Sanyo Mini Eco I 85464359981002 User Manual

INSTALLATION INSTRUCTIONS

– Mini ECO-i System Air Conditioner –

for Refrigerant R410A

I R410A Models

Indoor Units

Class

4-Way Air Discharge Semi-Concealed Type

1-Way Air Discharge Semi-Concealed Type

Concealed Duct Type

XHX1252 XHX1852 XHX2452 XHX3652

AHX0752

UHX0752

AHX0952 AHX1252

UHX1252 UHX1852 UHX2452 UHX3652

Concealed Duct

High-Static Pressure Type

DHX3652 DHX4852

Ceiling-Mounted Type

Wall-Mounted Type

THX1252 THX1852

THX2452

KHX0752

KHX0952 KHX1252 KHX1852 KHX2452

Outdoor Units

Class

Mini ECO-i

CHX03652 CHX06052

* Refrigerant R410A is used in the outdoor units.

Optional Controllers

Timer Wired Remote Controller

Wireless Remote Controller (For U, D Type)

Wireless Remote Controller (For X Type)

Wireless Remote Controller (For A, T Type)

RC Wireless Remote Controller (For K Type)

Simplified Remote Controller

System Controller

RCS-TM80BG

RCS-BH80AAB.WL

RCS-SH80AAB.WL

RCS-TRP80AAB.WL

RCS-SH1AAB

RCS-KR1AGB

SHA-KC64UG

Intelligent Controller

SHA-KT256BA

SHA-KA128AAB

ART-K45AGB

Communication Adaptor

Remote Sensor

LonWorks Interface

SHA-LN16UAB

85464359981002 ©SANYO 2006

SANYO Electric Co., Ltd.

Gunma, Japan

2. The standards for minimum room volume are as fol-

lows.

Check of Density Limit

The room in which the air conditioner is to be installed

requires a design that in the event of refrigerant gas

leaking out, its density will not exceed a set limit.

The refrigerant (R410A), which is used in the air conditioner,

is safe, without the toxicity or combustibility of ammonia,

and is not restricted by laws imposed to protect the ozone

layer. However, since it contains more than air, it poses the

risk of suffocation if its density should rise excessively.

Suffocation from leakage of refrigerant is almost non-exis-

tent. With the recent increase in the number of high density

buildings, however, the installation of multi air conditioner

systems is on the increase because of the need for effective

use of floor space, individual control, energy conservation

by curtailing heat and carrying power, etc.

(1) No partition (shaded portion)

(2) When there is an effective opening with the adjacent

room for ventilation of leaking refrigerant gas (opening

without a door, or an opening 0.15% or larger than the

respective floor spaces at the top or bottom of the

door).

Outdoor unit

Refrigerant tubing

Most importantly, the multi air conditioner system is able to

replenish a large amount of refrigerant compared to

conventional individual air conditioners. If a single unit of

the multi air conditioner system is to be installed in a small

room, select a suitable model and installation procedure

so that if the refrigerant accidentally leaks out, its density

does not reach the limit (and in the event of an emergency,

measures can be made before injury can occur).

In a room where the density may exceed the limit, create

an opening with adjacent rooms, or install mechanical

ventilation combined with a gas leak detection device.

The density is as given below.

Indoor unit

(3) If an indoor unit is installed in each partitioned room

and the refrigerant tubing is interconnected, the

smallest room of course becomes the object. But when

mechanical ventilation is installed interlocked with a

gas leakage detector in the smallest room where the

density limit is exceeded, the volume of the next

smallest room becomes the object.

Refrigerant tubing

Total amount of refrigerant (oz)

Min. volume of the indoor unit installed room (ft.³)

Outdoor unit

Density limit (oz/ft. )

Very

small

The density limit of refrigerant which is used in multi air condi-

tioners is 0.3 oz/ft.³(ISO 5149).

Indoor unit

room

Small

room

Medium

room

Large room

NOTE

1. If there are 2 or more refrigerating systems in a single

refrigerating device, the amount of refrigerant should be

as charged in each independent device.

Mechanical ventilation device – Gas leak detector

3. The minimum indoor floor space compared with the

amount of refrigerant is roughly as follows (when the

ceiling is 8.8 ft. high):

For the amount of charge in this example:

Outdoor unit

ft.³

ft.²

e.g., charged

amount (353 oz)

e.g., charged

amount (529 oz)

4000

454

Range below

the density limit of

0.3 oz/ft.³

(countermeasures

not needed)

3500

3000

2500

2000

1500

1000

500

398

341

284

227

170

114

Indoor unit

Room A Room B Room C Room D Room E Room F

Range above

the density limit of

0.3 oz/ft.³

(countermeasures

needed)

The possible amount of leaked refrigerant gas in rooms A, B

and C is 353 oz.

The possible amount of leaked refrigerant gas in rooms D, E

and F is 529 oz.

200 400 600 800 1000 1200

Total amount of refrigerant

Precautions for Installation Using New Refrigerant

1. Care regarding tubing

1-1. Process tubing

G Material: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless

Pipes and Tubes.”

G Tubing size: Be sure to use the sizes indicated in the table below.

G Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution joints

(optional).

G When bending tubing, use a bending radius that is 4 times the outer diameter of the tubing or larger.

Use sufficient care in handling the tubing. Seal the tubing ends with

CAUTION

caps or tape to prevent dirt, moisture, or other foreign substances

from entering. These substances can result in system malfunction.

Unit: in. (mm)

Material

Outer diameter

Wall thickness

1/4 (6.35)

1/32 (0.8)

3/8 (9.52)

1/32 (0.8)

1/2 (12.7)

1/32 (0.8)

5/8 (15.88)

5/128 (1.0)

3/4 (19.05)

5/128 (1.0)

Copper tube

1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A

refrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating

machine oil, the prevention of water and other impurities becomes more important than ever.

2. Be sure to recharge the refrigerant only in liquid form.

2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause

defects of the unit.

2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining

refrigerant and recharge the required total amount of new refrigerant after fixing the leak.

3. Different tools required

3-1. Tool specifications have been changed due to the characteristics of R410A.

Some tools for R22- and R407C-type refrigerant systems cannot be used.

Manifold gauge

R407C tools

compatible

with R410A?

New

tool?

Item

Remarks

Manifold gauge Yes

Types of refrigerant, refrigerating machine oil, and

pressure gauge are different.

Charge hose

Yes

To resist higher pressure, material must be changed.

Vacuum pump Yes

Yes

Use a conventional vacuum pump if it is equipped

with a check valve. If it has no check valve,

purchase and attach a vacuum pump adapter.

Leak detector

Flaring oil

Yes

Leak detectors for CFC and HCFC that

react to chlorine do not function because

R410A contains no chlorine. Leak detector

for HFC134a can be used for R410A.

Vacuum pump

Outlet

Inlet

For systems that use R22, apply mineral oil (Suniso oil)

to the flare nuts on the tubing to prevent refrigerant

leakage. For machines that use R407C or R410A, apply

synthetic oil (ether oil) to the flare nuts.

* Using tools for R22 and R407C and new tools for R410A together can cause defects.

3-2. Use R410A exclusive cylinder only.

Valve

Single-outlet valve

(with siphon tube)

Liquid refrigerant should be recharged

with the cylinder standing on end as

shown.

Liquid

New refrigerant R410A cannot be used for

earlier models

1. Compressor specifications are different.

If recharging a R22 or R407C compressor with

R410A, durability will significantly decrease since

some of the materials used for compressor parts are

different.

2. Existing tubing cannot be used (especially R22).

Completely cleaning out residual refrigerating

machine oil is impossible, even by flushing.

R410A

3. Refrigerating machine oil differs (R22).

Since R22 refrigerating machine oil is mineral oil, it

does not dissolve in R410A. Therefore, refrigerating

machine oil discharged from the compressor can

cause compressor damage.

R22 refrigerating machine oil

Mineral oil (Suniso oil)

R407C refrigerating machine oil Synthetic fluid (ether oil)

R410A refrigerating machine oil Synthetic fluid (ether oil)

CONTENTS

Page

3-11. Checking the Drainage

3-12. Electrical Power Wiring

3-13. How to Install the Ceiling Panel

IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Please Read Before Starting

Check of Density Limit

I Concealed Duct Type (U Type)

Precautions for Installation Using New Refrigerant

3-14. Required Minimum Space for Installation and

Service

3-15. Suspending the Indoor Unit

3-16. Installing the Drain Piping

3-17. Checking the Drainage

3-18. Increasing the Fan Speed

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1-1. Tools Required for Installation (not supplied)

1-2. Accessories Supplied

1-3. Type of Copper Tube and Insulation Material

1-4. Additional Materials Required for Installation

1-5. Tubing Size

1-6. Straight Equivalent Length of Joints

1-7. Additional Refrigerant Charge

1-8. System Limitations

1-9. Tubing Length

1-10. Check of Limit Density

1-11. Installing Distribution Joint

I Concealed Duct High-Static Pressure Type

(D Type)

3-19. Required Minimum Space for Installation and

Service

3-20. Suspending the Indoor Unit

3-21. Installing the Drain Piping

3-22. Caution for Ducting Work

3-23. Indoor Fan Performance

1-12. Optional Distribution Joint Kit

1-13. Example of Tubing Size Selection and

Refrigerant Charge Amount

I Ceiling-Mounted Type (T Type)

3-24. Required Minimum Space for Installation and

Service

2. SELECTING THE INSTALLATION SITE . . . . . 17

2-1. Indoor Unit

3-25. Suspending the Indoor Unit

3-26. Duct for Fresh Air

2-2. Outdoor Unit

2-3. Air-Discharge Chamber for Top Discharge

2-4. Installing the Unit in Heavy Snow Areas

2-5. Precautions for Installation in Heavy Snow

Areas

2-6. Dimensions of Air-Discharge Chamber

2-7. Dimensions of Outdoor Unit with

Air-Discharge Chamber (field supply)

2-8. Dimensions of Snow Ducting

2-9. Dimensions of Outdoor Unit with Snow-Proof

Ducting (field supply)

3-27. Shaping the Tubing

3-28. Installing the Drain Piping

I Wall-Mounted Type (K Type)

3-29. Removing the Rear Panel from the Unit

3-30. Selecting and Making a Hole

3-31. Installing the Rear Panel onto the Wall

3-32. Removing the Grille to Install the Indoor Unit

3-33. Preparing the Tubing

3-34. Shaping the Tubing

3-35. Installing the Drain Hose

3-36. When Using Wireless Remote Controller

Instead of Wired Remote Controller

3. HOW TO INSTALL THE INDOOR UNIT . . . . . 25

I 4-Way Air Discharge Semi-Concealed Type

(X Type)

4. HOW TO INSTALL THE OUTDOOR UNIT . . . 56

4-1. Installing the Outdoor Unit

3-1. Preparation for Suspending

3-2. Suspending the Indoor Unit

3-3. Placing the Unit Inside the Ceiling

3-4. Installing the Drain Piping

3-5. Checking the Drainage

3-6. How to Install the Ceiling Panel

3-7. Special Remarks

4-2. Drainage Work

4-3. Routing the Tubing and Wiring

5. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . 57

5-1. General Precautions on Wiring

5-2. Recommended Wire Length and Wire

Diameter for Power Supply System

I 1-Way Air Discharge Semi-Concealed Type

(A Type)

5-3. Wiring System Diagram

3-8. Suspending the Indoor Unit

3-9. Placing the Unit Inside the Ceiling

3-10. Installing the Drain Piping

Page

6. HOW TO PROCESS TUBING . . . . . . . . . . . . 61

6-1. Connecting the Refrigerant Tubing

6-2. Connecting Tubing Between Indoor and

Outdoor Units

6-3. Insulating the Refrigerant Tubing

6-4. Taping the Tubes

6-5. Finishing the Installation

7. AIR PURGING . . . . . . . . . . . . . . . . . . . . . . . . . 65

I Air Purging with a Vacuum Pump (for Test Run)

Preparation

8. TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

8-1. Preparing for Test Run

8-2. Test Run Procedure

8-3. Outdoor Unit PCB Setting

8-4. Auto Address Setting

8-5. Caution for Pump Down

8-6. Meaning of Alarm Messages

9. APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

9-1. 4-Way Air Discharge Semi-Concealed Type

(X Type)

9-2. 1-Way Air Discharge Semi-Concealed Type

(A Type)

9-3. Concealed Duct (High-Static Pressure) Type

(U, D Type)

9-4. Ceiling-Mounted Type (T Type)

9-5. Wall-Mounted Type (K Type)

1-3. Type of Copper Tube and Insulation Material

1. GENERAL

If you wish to purchase these materials separately from

a local source, you will need:

This booklet briefly outlines where and how to install

the air conditioning system. Please read over the entire

set of instructions for the outdoor unit and make sure all

accessory parts listed are with the system before

beginning.

1. Deoxidized annealed copper tube for refrigerant tub-

ing.

2. Foamed polyethylene insulation for copper tubes as

required to precise length of tubing. Wall thickness of

the insulation should be not less than 5/16 in.

1-1. Tools Required for Installation (not supplied)

1. Standard screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

3. Use insulated copper wire for field wiring. Wire size

varies with the total length of wiring.

Refer to 5. ELECTRICAL WIRING for details.

5. Carpenter’s level

6. Sabre saw or key hole saw

7. Hacksaw

8. Core bits

9. Hammer

Check local electrical codes

CAUTION

and regulations before

obtaining wire. Also, check

any specified instructions or

limitations.

10. Drill

11. Tube cutter

12. Tube flaring tool

13. Torque wrench

1-4. Additional Materials Required for Installation

1. Refrigeration (armored) tape

14. Adjustable wrench

15. Reamer (for deburring)

2. Insulated staples or clamps for connecting wire (See

your local codes.)

1-2. Accessories Supplied

3. Putty

See Tables 1-1 – 1-7.

4. Refrigeration tubing lubricant

5. Clamps or saddles to secure refrigerant tubing

6. Scale for weighing

Table 1-1 (Outdoor Unit)

Q’ty

Part name

Figure

03652

Model

(4 hp)

06052

Model

(6 hp)

Tube Discharge

Assy

Instruction manual

paper

hp = horsepower

Table 1-2 (4-Way Air Discharge Semi-Concealed)

Part Name

Figure

Q’ty

Remarks

Full-scale installation diagram

Printed on container box

For securing drain hose

For drain joint

Drain hose

Hose band

Drain insulator

For liquid tube

Flare insulator

For gas tube

White

Insulating tape

Packing

For gas tube joint

For drain joint

(heat-resisting)

Wiring cover

Screw

For covering erectrical wiring

For full-scale installation diagram

For suspending indoor unit from ceiling

For fixing the wiring cover

Washer

Screw

Table 1-3 (1-Way Air Discharge Semi-Concealed)

Part Name

Figure

Q’ty

Remarks

Full-scale installation diagram

Printed on container box

Drain hose

For securing drain hose

For drain joint

Hose band

Drain insulator

For liquid tube

Flare insulator

For gas tube

White

Insulating tape

Packing

For gas tube joint

(heat-resisting)

For drain joint

Washer

For suspending indoor unit from ceiling

For full-scale installation diagram

For electrical junction box

Screw

Bushing

Table 1-4 (Concealed Duct)

Part Name

Figure

Q’ty

Remarks

Drain hose

For securing drain hose

Hose band

For securing drain hose

For drain joint

Packing

Drain insulator

Flare insulator

Insulating tape

Flare insulator

Washer

For drain joint

For liquid tube

White

For gas and liquid tubes flare nuts

For gas tube

(heat-resisting)

For suspending indoor unit from ceiling

For sealing recessed portion of power supply

For flare and drain insulators

Sealing putty

Vinyl clamp

G Use 3/8" for suspending bolts.

G Field supply for suspending bolts and nuts.

Table 1-5 (Concealed Duct High-Static Pressure)

Part Name

Figure

Q’ty

Remarks

Washer

For suspending indoor unit from ceiling

Nut

For suspending indoor unit from ceiling

For gas tube

Flare insulator

For liquid tube

Drain socket

For drain pipe connection

Table 1-6 (Ceiling-Mounted)

Part Name

Figure

Q’ty

Remarks

Full-scale installation diagram

Printed on container box

Washer

For temporarily suspending indoor unit from ceiling

T1/8"

Flare insulator

For gas and liquid tube joints

T3/16"

White

Insulating tape

Vinyl clamp

Drain hose

For gas and liquid tubes flare nuts

For flare and drain insulators

For main unit and PVC pipe joints

For drain hose connection

For drain hose joint

(heat-resisting)

L5-1/2"

Hose band

Drain insulator

Gum eyelet

For power supply inlet

Table 1-7 (Wall-Mounted)

Part Name

Figure

Q’ty

Remarks

5/32" × 1"

Tapping screw

For fixing the rear panel

Plastic cover

For improved tubing appearance

Insulator

For insulating flare nut (2452 type only)

1-5. Tubing Size

Table 1-8 Main Tubing Size (LA)

BTU/h (kW)

System horsepower

Gas tubing

38,200 (11.2)

52,900 (15.5)

ø5/8" (ø15.88)

ø3/4" (ø19.05)

Liquid tubing

ø3/8" (ø9.52)

Unit: in. (mm)

Table 1-9 Main Tubing Size After Distribution (LB, LC...)

Below BTU/h 24,200 (2.5 hp) 38,200 (4 hp) 47,800 (5 hp) 52,900 (6 hp)

Total capacity

after distribution

Over BTU/h

Gas tubing

Liquid tubing

–

24,200 (2.5 hp)

ø5/8" (ø15.88)

ø3/8" (ø9.52)

ø1/2" (ø12.7)

ø3/8" (ø9.52)

ø3/4" (ø19.05)

Tubing size

Unit: in. (mm)

hp = horsepower

Note: In case the total capacity of connected indoor units exceeds the total capacity of the outdoor units, select the main

tubing size for the total capacity of the outdoor units.

Table 1-10 Indoor Unit Tubing Connection (

₂...

)

n–1

Indoor unit type

Gas tubing

ø1/2" (ø12.7)

ø5/8" (ø15.88)

Liquid tubing

ø1/4" (ø6.35)

ø3/8" (ø9.52)

Unit: in. (mm)

1-6. Straight Equivalent Length of Joints

Design the tubing system by referring to the following table for the straight equivalent length of joints.

Table 1-11 Straight Equivalent Length of Joints

Unit: ft.

Gas tubing size (in. (mm))

90° elbow

1/2" (12.7) 5/8" (15.88) 3/4" (19.05)

1.1

0.9

3.4

9.2

1.4

0.8

45° elbow

4.1

10.5

U-shape tube bend (R2-3/8" – 4" (60 – 100))

Trap bend

7.5

Y-branch distribution joint

Ball valve for service

Equivalent length conversion not needed.

Table 1-12 Required Copper Tubing Dimensions

Material

Unit: in. (mm)

Outer diameter

Wall thickness

1/4 (6.35)

1/32 (0.8)

3/8 (9.52)

1/32 (0.8)

1/2 (12.7)

1/32 (0.8)

5/8 (15.88)

5/128 (1.0)

3/4 (19.05)

Copper tube

over 5/128 (1.0)

1-7. Additional Refrigerant Charge

Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.

Table 1-13 Amount of Refrigerant Charge Per Meter, According to Liquid Tubing Size

Liquid tubing size

(in. (mm))

Amount of refrigerant

charge (oz/ft.)

Required amount of charge = (Amount of refrigerant

charge per meter of each size of liquid tube × its tube

length) + (...) + (...)

ø1/4" (ø6.35)

ø3/8" (ø9.52)

0.279

0.602

*Always charge accurately using a scale for weighing.

Table 1-14 Refrigerant Charge Amount at Shipment (for outdoor unit)

Heat pump unit

(Single-phase)

(oz)

CHX03652

CHX06052

123

1-8. System Limitations

Table 1-15 System Limitations

CHX03652 CHX06052

Outdoor units (Type)

Number of max. connectable indoor units

Max. allowable indoor/outdoor capacity ratio

50 – 130%

1-9. Tubing Length

Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown

in the figure below.

Main tube of unit

1st branch

Unit distribution tube

n-1

Note: Do not use commercially available T-joints for the liquid tubing.

R410A distribution joint

APR-P160BA (for indoor unit)

* Be sure to use special R410A distribution joints (APR: purchased separately) for outdoor

unit connections and tubing branches.

Table 1-16 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights

Items

Marks

Contents

Length (ft.)

Actual length

492

Max. tubing length

574

Equivalent length

Difference between max. length and min.

length from the No.1 distribution joint

Allowable tubing

length

131

L (L2 – L3)

₂...

Max. length of each distribution tube

Total max. tubing length including length of

656

+ +...

_n–1+L1

each distribution tube (only narrow tubing)

164

When outdoor unit is installed higher than indoor unit

Allowable elevation

difference

When outdoor unit is installed lower than indoor unit

131

Max. difference between indoor units

L = Length, H = Height

Always check the gas density

limit for the room in which the

unit is installed.

Minimum indoor volume & floor area as against the

amount of refrigerant is roughly as given in the following

table.

WARNING

ft.³

10000

ft.²

1136

1079

1022

966

909

852

795

738

682

625

568

511

454

398

341

284

227

170

114

1-10. Check of Limit Density

9500

9000

8500

8000

7500

7000

6500

6000

5500

5000

4500

4000

3500

3000

2500

2000

1500

1000

500

When installing an air conditioner in a room, it is neces-

sary to ensure that even if the refrigerant gas accidentally

leaks out, its density does not exceed the limit level for

that room.

Range below

the density limit of

0.3 oz/ft.³

(countermeasures

not needed)

If the density could exceed the limit level, it is necessary to

provide an opening between the unit and the adjacent

room, or to install mechanical ventilation which is inter-

locked with the leak detector.

Range above

the density limit of

0.3 oz/ft.³

(countermeasures

needed)

(Total refrigerant charged amount: oz)

(Min. indoor volume where the indoor unit is installed: ft.³)

Limit density 0.3 (oz/ft. )

500 1000 1500 2000 2500 3000

The limit density of refrigerant which is used in this unit is

0.3 oz/ft. (ISO 5149).

Total amount of refrigerant

The shipped outdoor unit comes charged with the amount

of refrigerant fixed for each type, so add it to the amount

that is charged in the field. (For the refrigerant charge

amount at shipment, refer to the unit’s nameplate.)

Tube branching methods (horizontal use)

Pay special attention to any

CAUTION

Horizontal

line

location, such as a basement,

etc., where leaking refrigerant

can accumulate, since refrig-

erant gas is heavier than air.

View as seen

from arrow

Arrow view

1-11. Installing Distribution Joint

Types of vertical trap specifications

(When using ball valve)

Main tubing

(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT”

enclosed with the optional distribution joint kit

(APR-P160BA).

(2) In order to prevent accumulation of refrigerant oil in

stopped units, if the main tubing is horizontal then each

branch tubing length should be at an angle that is

greater than horizontal. If the main tubing is vertical,

provide a raised starting portion for each branch.

Indoor unit (more than 2 units)

(If only 1 unit is connected,

a ball valve is also needed on this side.)

Ball valve

(BV: purchased

separately)

Indoor unit (1)

(When not using ball valve)

(3) If there are height differences between indoor units or if

branch tubing that follows a distribution joint is connect-

ed to only 1 unit, a trap or ball valve must be added to

that distribution joint. (When adding the ball valve,

locate it within 1.3 ft. of the distribution joint.)

(Consult with SANYO separately concerning the ball

valve.)

Main tubing

Horizontal

Indoor unit

(Each unit is connected to

tubing that is either level

or is directed downward.)

Branch tubing is

directed upward.

More than

8 in.

Indoor unit is directed downward

If a trap or ball valve is not added, do not operate

the system before repairs to a malfunctioning unit

are completed. (The refrigerant oil sent through the

tubing to the malfunctioning unit will accumulate

and may damage the compressor.)

1-12. Optional Distribution Joint Kit

See the installation instructions packaged with the distribution joint kit for the installation procedure.

Table 1-17

Model name

Cooling capacity after distribution

Remarks

APR-P160BA

76,400 BTU/h (22.4 kW) or less

For indoor unit

APR-P160BA

Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.)

Example

Gas tube

4-21/64

Liquid tube

4-21/64

3-13/16

Distribution

Joint

Unit: in.

Insulation

Table 1-18 Size of connection point on each part (Shown are inside diameters of tubing)

Size

Part A

Part B

Part C

Part D

Part E

ø3/4"

(ø19.05) (ø15.88)

ø5/8"

ø1/2"

(ø12.7)

ø3/8"

(ø9.52)

ø1/4"

(ø6.35)

in. (mm)

1-13. Example of Tubing Size Selection and Refrigerant Charge Amount

Additional refrigerant charging

Based on the values in Tables 1-2, 1-3, 1-4 and 1-7, use the liquid tubing size and length, and calculate the amount

of additional refrigerant charge using the formula below.

Required additional

refrigerant charge (oz)

= 0.602 × (a) + 0.279 × (b)

(a): Liquid tubing

Total length of ø3/8" (ft.)

(b): Liquid tubing

Total length of ø1/4" (ft.)

G Charging procedure

Be sure to charge with R410A refrigerant in liquid form.

1. After performing a vacuum, charge with refrigerant from the liquid tubing side. At this time, all valves must be

in the “fully closed” position.

2. If it was not possible to charge the designated amount, operate the system in Cooling mode while charging

with refrigerant from the gas tubing side. (This is performed at the time of the test run. For this, all valves

must be in the “fully open” position.)

Charge with R410A refrigerant in liquid form.

With R410A refrigerant, charge while adjusting the amount being fed a little at a time in order to prevent

liquid refrigerant from backing up.

G After charging is completed, turn all valves to the “fully open” position.

G Replace the tubing covers as they were before.

Tightening torque: 590 – 710 lbs·in.

Tightening torque for valve stem cap: 160 – 180 lbs·in.

Tightening torque: 300 – 360 lbs·in.

Tightening torque for valve stem cap: 240 – 280 lbs·in.

1. R410A additional charging absolutely must be done through liquid charging.

2. The R410A refrigerant cylinder has a gray base color, and the top part is pink.

CAUTION

3. The R410A refrigerant cylinder includes a siphon tube. Check that the siphon

tube is present. (This is indicated on the label at the top of the cylinder.)

4. Due to differences in the refrigerant, pressure, and refrigerant oil involved in

installation, it is not possible in some cases to use the same tools for R22 and

for R410A.

Example:

Main tube of unit

1st branch

Unit distribution tube

model 1852

n–1

model 0752 model 0952 model 1252 model 1852

G Example of each tubing length

Main tubing

LA = 131 ft.

LB = 16 ft.

LC = 16 ft.

LD = 49 ft.

Distribution joint tubing

Indoor side

1 = 16 ft.

2 = 16 ft.

3 = 7 ft.

4 = 20 ft.

5 = 16 ft.

G Obtain charge amount for each tubing size

Note that the charge amounts per 3.3 ft. are different for each liquid tubing size.

ø3/8" (ø9.52) → LA + LB + LC + LD

ø1/4" (ø6.35) → 1 + 2 + 3 + 4 + 5 : 75 ft. × 0.279 oz/ft.

: 212 ft. × 0.602 oz/ft. = 127 oz

20 oz

Total 147 oz

Additional refrigerant charge amount is 147 oz.

Be sure to check the limit

density for the room in which

the indoor unit is installed.

CAUTION

Checking of limit density

Density limit is determined on the basis of the size of a

room using an indoor unit of minimum capacity. For

instance, when an indoor unit is used in a room (floor area

80 ft²× ceiling height 8.8 ft. = room volume 704 ft.³), the

graph at right shows that the minimum room volume

should be 497 ft.³(floor area 56 ft.²) for refrigerant of 147

oz. Accordingly, openings such as louvers are required for

this room.

ft.³

4000

ft.²

454

Range below

the density limit of

0.3 oz/ft.³

(countermeasures

not needed)

3500

3000

2500

2000

1500

1000

500

398

341

284

227

170

114

Range above

the density limit of

0.3 oz/ft.³

(countermeasures

needed)

Overall refrigerant charge amount for the air conditioner: oz

(Minimum room volume for indoor unit: ft.³)

147 (oz) + 123 (oz)

200 400 600 800 1000 1200

Total amount of refrigerant

= 0.38 (oz/ft.³) > 0.3 (oz/ft.³)

704 (ft.³)

Therefore, openings such as louvers are required for this

room.

2. SELECTING THE INSTALLATION SITE

Ceiling-Mounted Type

Ceiling

2-1. Indoor Unit

AVOID:

Wall

G areas where leakage of flammable gas may be

expected.

min. 10 in.

G places where large amounts of oil mist exist.

Front view

G direct sunlight.

NOTE

G locations near heat sources which may affect the

The rear of the indoor unit can be installed flush

against the wall.

performance of the unit.

Air

discharge

G locations where external air may enter the room

directly. This may cause “sweating” on the air dis-

charge ports, causing them to spray or drip.

Air intake

min. 2 ft.

G locations where the remote controller will be splashed

with water or affected by dampness or humidity.

G installing the remote controller behind curtains or

Side view

Max. 10 in.

Obstacle

furniture.

G locations where high-frequency emissions are

Fig. 2-1

generated.

ConcealedDuct(High-StaticPressure)Type

4-Way Air Discharge Semi-Concealed Type

DO:

G select an appropriate position from which every

corner of the room can be uniformly cooled.

G select a location where the ceiling is strong enough

to support the weight of the unit.

G select a location where tubing and drain pipe have

the shortest run to the outdoor unit.

G allow room for operation and maintenance as well as

unrestricted air flow around the unit.

Fig. 2-2

G install the unit within the maximum elevation

difference above or below the outdoor unit and within

a total tubing length (L) from the outdoor unit as

detailed in Table 1-16.

1-Way Air Discharge Semi-Concealed Type

Ceiling

Air

G allow room for mounting the remote controller about

3 ft. off the floor, in an area that is not in direct

sunlight nor in the flow of cool air from the indoor

unit.

discharge

Air

intake

min. 2 in.

Wall

min. 2 in.

Obstacle

Side view

Fig. 2-3

NOTE

Wall-Mounted Type

Air delivery will be degraded if the distance from the

floor to the ceiling is greater than 10 ft.

min. 6 in.

min.

6 in.

min.

6 in.

Front View

Fig. 2-4

2-2. Outdoor Unit

Exhaust fan

AVOID:

Hot air

G heat sources, exhaust fans, etc. (Fig. 2-5)

G damp, humid or uneven locations

Heat source

Out-

door

unit

DO:

G choose a place as cool as possible.

G choose a place that is well ventilated and outside

air temperature does not exceed maximum 113°F

constantly.

Fig. 2-5

G allow enough room around the unit for air intake/

exhaust and possible maintenance. (Fig. 2-6)

G use lug bolts or equal to bolt down unit, reducing

vibration and noise.

Installation space

Distance between obstructions and the unit air inlet

and outlet must be as shown below.

(Obstruction above unit)

Air direction chamber

(field supply)

Inlet side C

More than 25/64"

Outlet side

More than

3.3 ft.

Inlet side

More than 8 in.

(Obstruction on

inlet side)

Fig. 2-6

(Ground)

Fig. 2-7

G Concerning inlet-side distance “C” (Fig. 2-6)

CAUTION

The minimum for distance “C” is 6 in. if there are no obstructions on the outlet side

(wall *1 side) and *2 or *4 is not present. In all other cases, the minimum for distance

“C” is 8 in.

G If the unit is installed with the outlet side facing wall *1, then there must be no obstruc-

tions on 2 of the remaining 3 sides: *2, *3, *4.

G If wall *1 is on the outlet side (Fig. 2-6), or if obstructions are present on all 3 sides *2,

*3, and *4 (Fig. 2-6), then the minimum distance for “A” and “B” is 6.6 ft. (Fig. 2-8).

Even if there is no wall on the outlet side, a minimum of 3.3 ft. is required.

In case of multiple installations

G provide a solid base (concrete block, 4 × 16 in.

beams or equal), a minimum of 6 in. above ground

level to reduce humidity and protect the unit against

possible water damage and decreased service life.

(Fig. 2-8)

Anchor bolts

(4 pieces)

G use lug bolts or equal to bolt down unit, reducing

vibration and noise.

Fig. 2-8

2-3. Air Discharge Chamber for Top Discharge

Be sure to install an air discharge chamber (field sup-

ply) in the field when:

Air discharge

G it is difficult to keep a space of min. 20 in. between

the air discharge outlet and an obstacle.

G the air discharge outlet is facing a sidewalk and

discharged hot air may annoy passers-by.

Refer to Fig. 2-10.

2-4. Installing the Unit in Heavy Snow Areas

In locations with strong wind, snow-proof ducting

(field supply) should be fitted and direct exposure to

the wind should be avoided as much as possible.

Fig. 2-10

I Countermeasures against snow and wind

In regions with snow and strong wind, the following

problems may occur when the outdoor unit is not pro-

vided with a platform and snow-proof ducting:

In regions with significant snowfall, the outdoor unit should

be provided with a platform and snow-proof ducting.

a) The outdoor fan may not run and damage to the

unit may occur.

b) There may be no air flow.

c) The tubing may freeze and burst.

d) The condenser pressure may drop because of

strong wind, and the indoor unit may freeze.

2-5. Precautions for Installation in Heavy Snow

Areas

(1) The platform should be higher than the max. snow

depth. (Fig. 2-11)

Without snow-

proof ducting

(Low platform)

With snow-

proof ducting

(High platform)

(2) The 2 anchoring feet of the outdoor unit should be

used for the platform, and the platform should be

installed beneath the air intake side of outdoor

unit.

Fig. 2-11

(3) The platform foundation must be firm and the unit

must be secured with anchor bolts.

Outdoor

Unit

(4) In case of installation on a roof subject to strong

wind, countermeasures must be taken to prevent

the unit from being blown over.

Duct

Air

Intake

Fig. 2-12

2-6. Dimensions of Air-Discharge Chamber

Reference diagram for air-discharge chamber (field supply)

CHX03652/06052

Unit front, air discharge chamber

Unit left side, air discharge chamber

Unit light side, air discharge chamber

Reinforcement brackets, 4 locations

9-7/16

1-1/8

9-7/16

Rectangular

hole

Rectangular

hole

Rectangular

hole

Rectangular

hole

22-13/32

21-13/32

Unit: in.

2-7. Dimensions of Outdoor Unit with Air-Discharge Chamber (field supply)

CHX03652/06052

6-11/16

25-31/32

4-5/16

Wind direction

1/2

2-11/36

21-13/32

11-13/16

Wind direction

Wind

direction

Wind

direction

Wind direction

Wind

direction

Wind

direction

Unit: in.

Reference for air-discharge chamber (field supply)

Required space around outdoor unit

CHX03652/06052

If an air discharge chamber is used, the space shown below must be secured around the outdoor unit.

If the unit is used without the required space, a protective device may activate, preventing the unit from operating.

(1) Single-unit installation

Unit: in.

The top and both sides must remain open.

If there are obstacles to the front and rear of the outdoor unit,

the obstacle at either the front or rear must be no taller than the

CAUTION

height of the outdoor unit.

(2) Multiple-unit installation

Installation in lateral rows

More than 11-13/16

Unit: in.

More than 7-7/8

The front and top must remain open.

The obstacles must be no taller than the height of the outdoor unit.

CAUTION

Installation in front-rear rows

Installation with intakes facing

Installation with intakes facing outlets

intakes or outlets facing outlets

More than 15-3/4

More than 78-3/4

More than 59-1/16

Unit: in.

The front and both sides must remain open.

CAUTION

2-8. Dimensions of Snow Ducting

Reference diagram for snow-proof ducting (field supply)

CHX03652/06052

Fastened by screws at 13 locations

30-3/32

Unit top, snow-proof vent

Unit left side

Unit right side

Unit reverse side

Unit: in.

25-13/32

17-15/32

11-7/8

3-3/4

19-11/16

3-31/32

Fastened by screws at

3 locations (also on reverse side)

5/8

1-3/16

1-5/8

28-3/4

Fastened by screw at

1 location (also on reverse side)

15-9/32

30-5/8

2-9. Dimensions of Outdoor Unit with Snow-Proof Ducting (field supply)

CHX03652/06052

30-3/32

7-1/16

Wind direction

Unit: in.

Wind direction

24-7/8

11-29/32

Wind direction

Reference diagram for snow-proof ducting – 1

Space requirements for setting – (1)

CHX03652/06052

[Obstacle to the front of unit]

[Obstacle to the rear of unit]

Top is open:

(1) Single-unit installation (2) Obstacles on both sides

(1) Single-unit installation

Min. B

(2) Multiple-unit installation (2 or more units)

Min. C

(3) Multiple-unit installation (2 or more units)

Min. I

Outdoor unit

CHX03652/06052

19-11/16 11-13/16 39-3/8

Min. E

Min. F

Outdoor unit

CHX03652/06052

5-29/32 5-29/32 11-13/16 7-7/8 11-13/16 5-29/32 7-7/8

Note: In cases 2 and 3 the height of the obstacle

must be no taller than the height of the outdoor

unit.

Top is blocked by an obstacle:

Min. M

Min. L

Outdoor unit

CHX03652/06052

39-3/8 39-3/8

Outdoor unit

CHX03652/06052

19-11/16 5-29/32

Unit: in.

Reference diagram for snow-proof ducting – 2

Space requirements for setting – (2)

CHX03652/06052

[Obstacles to the front and rear of unit]

The top and both sides must remain open. Either the obstacle to the front or

the obstacle to the rear must be no taller than the height of the outdoor unit.

(1) Single-unit installation

Dimension Q

If a snow protection duct is attached after the unit is

installed, verify that dimension Q is 19-11/16 in. or more.

Outdoor unit

CHX03652/06052

39-3/8 5-29/32

(2) Obstacles on both sides

Min. 11-13/16

[Installation in front-rear rows]

G The top and both sides must remain open. Either the obstacle to the front or the obstacle

to the rear must be no taller than the height of the outdoor unit.

Min. 11-13/16

Min. 39-3/8

Min. 7-7/8

Min. 59-1/16

Min. 78-3/4

Dimension Q

If a snow protection duct is

attached after the unit is

installed, verify that dimension

Q is 19-11/16 in. or more.

Unit: in.

3. HOW TO INSTALL THE INDOOR UNIT

I 4-Way Air Discharge Semi-Concealed Type (X Type)

Note: For DC Fan Tap Change Procedure

for 4-Way Cassette, see page 31.

3-1. Preparation for Suspending

This unit uses a drain pump. Use a carpenter’s level to check that the

unit is level.

Hole-in-anchor

Hole-in-plug

Concrete

Insert

3-2. Suspending the Indoor Unit

(1) Fix the suspension bolts securely in the ceiling using the method

shown in the diagrams (Figs. 3-1 and 3-2), by attaching them to the

ceiling support structure, or by any other method that ensures that

the unit will be securely and safely suspended.

Suspension bolt (M10 or 3/8")

(field supply)

(2) Follow Fig. 3-2 and Table 3-1 to make the holes in the ceiling.

Fig. 3-1

Table 3-1

Unit: in. (mm)

Length

Type

31-1/32 28-15/32 34-27/32 34-27/32

(788) (723) (885) (885)

12, 18, 24, 36

(3) Determine the pitch of the suspension bolts using the supplied full-

scale installation diagram. The diagram and table (Fig. 3-3 and

Table 3-2) show the relationship between the positions of the sus-

pension fitting, unit, and panel.

Unit: in. (mm)

Table 3-2

A (suspension bolt pitch)

Length

Type

C (ceiling opening dimension)

4-29/64

(113)

6-13/16

(173)

10-5/64

(256)

8-17/64

(210)

3-15/32

(88)

12, 18, 24

Fig. 3-2

4-29/64

(113)

6-13/16

(173)

12-9/16

(319)

8-17/64

(210)

3-15/32

(88)

Drain outlet(other side)

Refregerant tubing joint(liquid side)

Refregerant tubing joint(gas side)

(VP25)

Suspension lug

Power supply outlet

Inter-unit control wiring

Unit: in. (mm)

Fig. 3-3

3-3. Placing the Unit Inside the Ceiling

(1) When placing the unit inside the ceiling, determine

the pitch of the suspension bolts using the supplied

full-scale installation diagram. (Fig. 3-4)

Tubing and wiring must be laid inside the ceiling

when suspending the unit. If the ceiling is already

constructed, lay the tubing and wiring into position

for connection to the unit before placing the unit

inside the ceiling.

Full-scale installation diagram

(printed on top of container box)

Supplied bolt

Unit: in. (mm)

Fig. 3-4

(2) The length of suspension bolts must be appropriate

for a distance between the bottom of the bolt and the

bottom of the unit of more than 19/32 in. as shown in

Fig. 3-5.

Suspension bolt

Suspension lug

Nuts and washers

(use for upper and lower)

(3) Thread the 3 hexagonal nuts and 2 washers (field

supply) onto each of the 4 suspension bolts as shown

in Fig. 3-5. Use 1 nut and 1 washer for the upper side,

and 2 nuts and 1 washer for the lower side, so that the

unit will not fall off the suspension lugs.

Notch

Double nut

15/32 – 43/64 (12 – 17)

(4) Adjust so that the distance between the unit and the

ceiling bottom is 15/32 to 43/64 in. Tighten the nuts on

the upper side and lower side of the suspension lug.

Unit: in.

Fig. 3-5

(5) Remove the protective polyethylene used to protect

the fan parts during transport.

Hard PVC

socket

Hard PVC pipe

VP-25

(Field supply)

Hose band

Connection pipe

VP-25

(Field supply)

3-4. Installing the Drain Piping

Supplied

drain hose

(drain port)

(1) Prepare a standard hard PVC pipe (O.D. 1-1/4 in.) for

the drain and use the supplied drain hose and hose

band to prevent water leaks.

The PVC pipe must be purchased separately. The

unit’s transparent drain port allows you to check

drainage. (Fig. 3-6)

PVC adhesive

Packing

(supplied)

Align the hose

band with the end

of the pipe

CAUTION

Bead

Fig. 3-6

G Insert the drain pipe until it contacts the socket, as

shown in Fig. 3-6, then secure it tightly with the

hose band.

G Do not use adhesive when connecting the supplied

hose.

Drain insulator (supplied)

Reasons: 1. It may cause water to leak from the

connection. Since the connection is

slippery just after the adhesive has been

applied, the pipe easily slips off.

2. The pipe cannot be removed when

maintenance is needed.

Fig. 3-7

G Do not bend the supplied drain hose 90° or more.

The hose may slip off.

G Align the hose bands with the end of the hose.

Tighten the hose band firmly. Please make sure

that the bead is not covered by the hose band.

(Fig. 3-6)

Air bleeder prohibited

Tighten the hose clamps so

their locking nuts face upward.

(Fig. 3-6)

CAUTION

Fig. 3-8

(2) After checking the drainage, wrap the supplied packing

and drain pipe insulator around the pipe. (Fig. 3-7)

G Do not install an air bleeder

as this may cause water to

spray from the drain pipe

outlet. (Fig. 3-8)

CAUTION

NOTE

Make sure the drain pipe has a downward gradient (1/100

or more) and that there are no water traps.

CAUTION

11-3/16 in. or less (as short as possible)

33-15/32 in. or less

G In cases where it is necessary to raise the height

of the drain piping, the drain piping can be raised

to a maximum height of 33-15/32" above the

bottom surface of the ceiling. Under no

conditions attempt to raise it higher than

33-15/32" above the bottom surface of the ceiling.

Doing so will result in water leakage. (Fig. 3-9)

G Do not install the pipe with an upward gradient

from the connection port. This will cause the

drain water to flow backward and leak when the

unit is not operating. (Fig. 3-10)

0 – 45°

* Length of supplied drain hose = 9-27/32 in.

Fig. 3-9

Upward gradient prohibited

G Do not apply force to the piping on the unit side

when connecting the drain pipe. The pipe should

not be allowed to hang unsupported from its

connection to the unit. Fasten the pipe to a wall,

frame, or other support as close to the unit as

possible. (Fig. 3-11)

Fig. 3-10

G Provide insulation for any pipes that are run

indoors.

Support

pieces

3-5. Checking the Drainage

Fig. 3-11

After wiring and drain piping are completed, use the

following procedure to check that the water will drain

smoothly. For this, prepare a bucket and wiping cloth to

catch and wipe up spilled water.

Drainage check

(1) Connect power to the power terminal board (R, S

terminals) inside the electrical component box.

(2) Slowly pour about 0.3 gal of water into the drain pan

to check drainage. (Fig. 3-12)

(3) Short the check pin (CHK) on the indoor control

board and operate the drain pump. Check the water

flow through the transparent drain pipe and see if

there is any leakage.

Drain pan outlet

Plastic container

for water intake

Water (Approx. 0.3 gal)

(4) When the check of drainage is complete, open the

check pin (CHK) and remount the tube cover.

Fig. 3-12

Be careful since the fan will

start when you short the pin

on the indoor control board.

CAUTION

3-6. How to Install the Ceiling Panel

must be within the range of 15/32 – 43/64 in.

3-6-1. Before Installing the Ceiling Panel

Checking the unit position

If not within this range, malfunction or other trouble may result.

(1) Check that the ceiling hole is within this range:

33-55/64 × 33-55/64 to 35-53/64 × 35-53/64 in.

Main unit

(2) Use the full-scale installation diagram (from the

packaging) that was supplied with the unit to

determine the positioning of the unit on the ceiling

surface. If the positions of the ceiling surface and

unit do not match, air leakage, water leakage, flap

operation failure, or other problems may result.

Ceiling opening

dimension

Ceiling side

Fig. 3-13

Flap

CAUTION

G Never place the panel face-down. Either hang

it vertically or place it on top of a projecting

object. Placing it face-down will damage the

surface.

G Do not touch the flap or apply force to it.

(This may cause flap malfunction.)

Fig. 3-14

Remove the air-intake grille and air filter from the

ceiling panel. (Figs. 3-16, 3-17 and 3-18)

Screw

Latch

a) Remove the 2 screws on the latch of the air-intake

grille. (Fig. 3-16)

b) Slide the air-intake grille catches in the direction

shown by the arrows

(Fig. 3-17)

to open the grille.

c) With the air-intake grille opened, remove the grille

hinge from the ceiling panel by sliding it in the direc-

tion shown by the arrow 2 . (Fig. 3-18)

Fig. 3-15

Air-intake grille

Ceiling panel

Removing the corner cover

a) Slide the corner cover to the direction shown

by the arrow

(Fig. 3-18).

to remove the corner cover.

Air-intake grille hinge

Fig. 3-16

Fig. 3-17

Ceiling panel

Corner cover

Push

Strap

Corner cover

Fig. 3-18

Inter-unit control wiring

3-6-2. Installing the Ceiling Panel

After completing the wiring process, install the

supplied wiring cover before installing the panel.

It is not possible to install the wiring cover after

installing the panel.

The power must be turned ON in order to change the

flap angle. (Do not attempt to move the flap by hand.

Doing so may damage the flap.)

Screw (supplied)

Wiring cover (supplied)

Power supply outlet

M4-8 or 5/32" – 5/16"

(1) Insert the temporary fasteners (stainless steel) on

the inside of the ceiling panel into the square

holes on the unit to temporarily fasten the ceiling

panel in place. (Fig. 3-20-1)

Fig. 3-19-1

Fig. 3-19-2

Square hole in unit

G The ceiling panel must be installed in the correct

direction relative to the unit. Align the REF. PIPE

and DRAIN marks on the ceiling panel corner with

the correct positions on the unit.

Push when

Temporary

fastener

you remove

Temporary

fastener

G To remove the ceiling panel, support the ceiling

panel while pressing the temporary fasteners

toward the outside. (Fig. 3-20-1)

Fig. 3-20-1

Drain tubing corner

(2) Align the panel installation holes and the unit

screw holes.

Refrigerant tubing

corner

(3) Tighten the supplied washer head screws at the

4 panel installation locations so that the panel is

attached tightly to the unit. (Fig. 3-20-2)

After completing the

wiring process, install

the supplied wiring cover

before installing the panel.

It is not possible to install

the wiring cover after

installing the panel.

(4) Check that the panel is attached tightly to the

ceiling.

Celling panel

G At this time, make sure that there are no gaps

between the unit and the ceiling panel, or between

the ceiling panel and the ceiling surface.

(Fig. 3-21)

DRAIN mark

G If there is a gap between the panel and the ceiling,

leave the ceiling panel attached and make fine

adjustments to the installation height of the unit to

eliminate the gap with the ceiling. (Fig. 3-21)

Panel installation hole

(4 locations)

REF,PIPE

mark

Washer head

screws

Fig. 3-20-2

Insert a wrench

or other tool into

the corner cover

installation hole

and make fine

adjustments to

the unit nut.

Do not allow

gaps

Main unit

Ceiling surface

Ceiling panel

CAUTION

Fig. 3-21

Fig. 3-22

The height of the unit can be adjusted from the

ceiling panel corner hole, with the ceiling panel

attached, to an extent that does not affect the

unit levelness, the drain hose, or other elements.

G If the screws are not sufficiently tight-

ened, trouble such as that shown in

the figure below may occur. Be sure

to tighten the screws securely.

G If a gap remains between the ceiling

surface and the ceiling panel even

after the screws are tightened,

adjust the height of the unit again.

Air leakage

Air leakage from

ceiling surface

Staining

Adjust so that there are no gaps.

Condensation, water leakage

Fig. 3-23

3-6-3. Wiring the Ceiling Panel

(Direction that the unit faces has been changed to

facilitate explanation.)

(1) Open the cover of the electrical component box.

Electrical component

box cover

(2) Connect the 7P wiring connector (red) from the

ceiling panel to the connector in the unit electrical

component box.

Ceiling panel

wiring connector

G If the connectors are not connected, the Auto flap will

not operate. Be sure to connect them securely.

G Check that the wiring connector is not caught

between the electrical component box and the cover.

G Check that the wiring connector is not caught

between the unit and the ceiling panel.

Screws

(3 locations)

Ceiling panel side

Mains side

Clamp

* Pass the wiring connector through the clamp to fasten it in place,

as shown in the figure.

3-6-4. How to Attach the Corner & Air-Intake Grille

Attaching the corner cover and air-intake grille

Fig. 3-24

A. Attaching the corner cover

(1) Check that the safety cord from the corner cover is

fastened to the ceiling panel pin, as shown in the

figure.

(2) Use the supplied screws to attach the corner cover

to the ceiling panel.

B. Attaching the air-intake grille

Place the corner cover so that the 3 tabs

fit into the holes in the ceiling panel.

Then fasten it in place with the supplied screws.

G To install the air-intake grille, follow the steps for

Removing the grille in the reverse order. By rotating

the air-intake grille, it is possible to attach the grille

onto the ceiling panel from any of 4 directions.

Coordinate the directions of the air-intake grilles

when installing multiple units, and change the

directions according to customer requests.

Fig. 3-25

Hole for ceiling panel hook

G When attaching the air-intake grille, be careful

that the flap lead wire does not become caught.

G Be sure to attach the safety cord that prevents

the air-intake grille from dropping off to the

ceiling panel unit as shown in the figure at right.

G With this ceiling panel, the directions of the air-intake

grille lattices when installing multiple units, and the

position of the label showing the company name on

the corner panel, can be changed according to

customer requests, as shown in the figure below.

However, the optional wireless receiver kit can only

be installed at the refrigerant-tubing corner of the

ceiling unit.

Hook that prevents

the grille from dropping

Fig. 3-26

Locations of the air-intake grille catches at

the time the product is shipped.

* The grille can be installed with these

Unit drain hose side

Unit refrigerant tube side

catches facing in any of 4 directions.

Optional wireless receiver kit

* Can only be installed

in this position.

Can be installed rotated 90˚

Unit electrical component box

Fig. 3-27

3-6-5. Checking After Installation

G Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling

surface. Gaps may cause water leakage and condensation.

G Check that the wiring is securely connected.

If it is not securely connected, the auto flap will not operate. (“P09” is displayed on the remote controller.) In addition,

water leakage and condensation may occur.

3-6-6. When Removing the Ceiling Panel for Servicing

When removing the ceiling panel for servicing, remove the air-intake grille and air filter, disconnect the wiring connector

inside the electrical component box, and then remove the 4 mounting screws.

3-6-7. Adjusting the Auto Flap

The air-direction louver on the ceiling panel outlet can be adjusted as follows.

G Adjust the louver to the desired angle using the remote controller. The louver also has an automatic air-sweeping

mechanism.

NOTE

G Never attempt to move the louver by hand.

G Proper air flow depends on the location of the air conditioner, the layout of the room and furniture, etc. If cooling or

heating seems inadequate, try changing the direction of the air flow.

3-7. Special Remarks

DC Fan Tap Change Procedure

<Steps> Be sure to turn OFF the power (at mains) before beginning the work below.

(1) In the table below, check the field-supply parts that will be used. (If this setting is not made, the airflow may

decrease and condensation may occur.)

Setting

Air shield material (for use with 3-direction discharge)*

(a)

Air shield material (for use when a discharge duct is connected)*

(b)

Air shield material (for use with 2-direction discharge)*

* Use field-supply air shield material.

Setting (a): Go to (2).

Setting (b): Go to (3).

Indoor unit control PCB

(2) Setting (a)

Open the cover of the electrical component box.

Short the short-circuit pin TP3 (2P, yellow) on the

indoor unit control PCB.

* PCB model No.: CR-SXRP56B-B

(3) Setting (b)

Open the cover of the electrical component box.

Short the short-circuit pin TP6 (2P, white) on the

indoor unit control PCB.

Fig. 3-28

I 1-Way Air Discharge Semi-Concealed Type (A Type)

29-59/64 (Panel outer dimensions)

28-47/64 (Ceiling opening dimension)

25-63/64 (Suspension bolt pitch)

Unit: in.

3-8. Suspending the Indoor Unit

(1-27/64)

1-27/64

(1) Follow the diagrams to make the holes in the ceiling.

(Figs. 3-29 and 3-30)

(2) Depending on the ceiling type:

G Insert suspension bolts as shown in Fig. 3-31

G Use existing ceiling supports or construct a suitable

support as shown in Fig. 3-32.

G Make sure that the length of suspension bolts from the

bottom of the unit is 19/32 in. or more. (Fig. 3-33)

23-5/8

Fig. 3-29

Drain pipe connection

(Be sure to connect the supplied flexible hose.)

WARNING

22-3/64

It is important that you use extreme care in

supporting the indoor unit from the ceiling. Ensure

that the ceiling is strong enough to support the

weight of the unit. Before hanging the unit, test the

strength of each attached suspension bolt.

10-1/32

1-19/64

5-19/64

1-49/64

(3) Calculate the suspension bolt pitch using the full-

size installation diagram (printed on the package).

The relationship between the positions of the

suspension lugs, unit, and ceiling panel is as

shown in Fig. 3-30.

Flared refrigerant

connection outlet

(liquid tube)

Flared refrigerant

connection outlet

(gas tube)

Inter-unit

Control Wiring

Power supply outlet

Unit: in.

(4) Cut the ceiling material, if necessary.

(Figs. 3-29 and 3-30)

Fig. 3-30

If the system requires fresh air to be drawn into the unit,

cut and remove the insulation (both externally and

Hole-in-anchor

Hole-in-plug

Concrete

Insert

internally) at the location shown as

3-35.

in Figs. 3-34 and

Suspension bolt

(M10 or 3/8")

CAUTION

Fig. 3-31

When making the cuts to the insulation, be careful

not to damage the drain pan.

Ceiling tiles

3-9. Placing the Unit Inside the Ceiling

Be sure to use a level gauge

Ceiling support

CAUTION

and confirm that the unit is

level. If it is not level, water

leakage may occur.

(1) Use the supplied M5 or 3/16" screws (4) to attach

the full-size installation diagram to the indoor unit

suspension lugs, in order to obtain the ceiling

opening dimensions for suspending the unit.

Fig. 3-32

Full-scale

installation diagram

Caution: Piping and wiring work must be performed

inside the ceiling after the unit is suspended.

Therefore if the ceiling is already installed, the

wiring and piping work should be completed

up to the connection points prior to

Suspension

lug

suspending the unit.

over 19/32 in.

25/32 – 1 in.

(2) Attach the special washers (supplied) and nuts (field

supply) to the suspension bolts (4 locations).

Fig. 3-33

CAUTION

For fresh air intake

(ø3-15/16 hole)

3-5/32

G Use M10 or 3/8" nuts.

G The length of the suspension bolts must be such that

there is a space of at least 19/32 in. below the bottom

of the suspension lugs, as shown in Fig. 3-33. If the

length of the suspension bolts is too long, the bolts

may interfere with the ceiling panel and louver motor,

preventing their installation.

Unit: in.

Fig. 3-34

(3) Thread the 3 hexagonal nuts and 2 washers (field

supply) onto each of the 4 suspension bolts as

shown in Fig. 3-36. Use 1 nut and 1 washer for the

upper side, and 2 nuts and 1 washer for the lower

side, so that the unit will not fall off the suspension

lugs.

For fresh air intake

(ø3-15/16 hole)

6-11/16

(4) Lift up the indoor unit and fit the suspension bolts

into the notches in the suspension lugs.

(5) Adjust so that the distance between the bottom of

the indoor unit suspension lugs and the bottom of

the ceiling panel is 25/32 – 1 in. Then tighten the

nuts above and below each suspension lug. The

full-size installation diagram can be used to help

adjust the height of the indoor unit.

Unit: in.

Fig. 3-35

Suspension bolt

Nuts and washers

Suspension lug

(Used above and below.)

Double nuts

Notch

over 19/32 in.

25/32 – 1 in.

Fig. 3-36

2-1/8

CAUTION

G The indoor unit includes a drain pump. Be sure to

use a level gauge and verify that the unit is level.

G Before inserting the ceiling material, complete as

much of the drain piping work and refrigerant

tubing work as possible.

Suspension bolts

Tubing side

Unit: in.

(6) The distance between the unit and the opening of

the ceiling and the distance between the bottom

surface of the ceiling and the bottom surface of the

flange of the unit should follow the dimensions given

in Figs. 3-37 and 3-38.

Suspension bolts

Fig. 3-37

Ceiling

material

3-10. Installing the Drain Piping

(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for

the drain and use the supplied drain hose and hose

band to prevent water leaks.

Fig. 3-38

The PVC pipe must be purchased separately. The

unit’s transparent drain port allows you to check

drainage. (Fig. 3-39)

Align the hose band with end of the

hose, and tighten so that it does not

contact the bead.

CAUTION

Drainage check

Hard PVC

section on drain port

pipe

Drain hose

(supplied)

Hard PVC

(transparent)

VP-25

(not supplied)

socket VP-25

G Do not use adhesive at the drain connection port on

the indoor unit.

(not supplied)

G Insert the drain pipe until it contacts the socket, as

shown in the figure at right, then secure it tightly with

the hose band.

PVC adhesive

Packing (supplied)

Bead

G Tighten the hose clamps so their locking nuts face

upward. (Fig. 3-39)

Fig. 3-39

G Do not use the supplied drain hose bent at a 90°

angle. (The maximum permissible bend is 45°.)

G Check the drainage at the unit drain port

(transparent).

Drain insulator (supplied)

(2) After checking the drainage, wrap the supplied

packing and drain pipe insulator around the pipe,

then secure it with the supplied clamps. (Fig. 3-40)

Fig. 3-40

NOTE

Make sure the drain pipe has a downward gradient

(1/100 or more) and that there are no water traps.

CAUTION

G Do not install an air bleeder as this may cause water

to spray from the drain pipe outlet. (Fig. 3-41)

G In cases where it is necessary to raise the height of

the drain piping, the drain piping can be raised to a

maximum height of 33-15/32" above the bottom

surface of the ceiling. Under no conditions attempt to

raise it higher than 33-15/32" above the bottom

surface of the ceiling. Doing so will result in water

leakage. (Fig. 3-42)

Air bleed valve

Fig. 3-41

11-13/16 in. or less

33-15/32 in. or less

G Do not use natural drainage.

0 – 45°

G Do not install the pipe with an upward gradient from

the connection port. This will cause the drain water

to flow backward and leak when the unit is not

operating. (Fig. 3-43)

* Length of supplied drain hose = 9-27/32 in.

Fig. 3-42

G Do not apply force to the piping on the unit side when

connecting the drain pipe. The pipe should not be

allowed to hang unsupported from its connection to

the unit. Fasten the pipe to a wall, frame, or other

support as close to the unit as possible. (Fig. 3-44)

G Provide insulation for any pipes that are run indoors.

Uphill slope

Fig. 3-43

3-11. Checking the Drainage

Support

bracket

After wiring and drain piping are completed, use the

following procedure to check that the water will drain

smoothly. For this, prepare a bucket and wiping cloth to

catch and wipe up spilled water.

(1) Connect power to the power terminal board (R, S

terminals) inside the electrical component box.

Fig. 3-44

(2) Pour about 0.2 gal of water into the drain pan using a

siphon pump through the air outlet grille. (Fig. 3-45)

Drainage check

(3) Short the check pin (CHK) on the indoor control board

and operate the drain pump. Check the water flow

through the transparent drain pipe and see if there is any

leakage.

Drain tube

connection

(transparent)

Discharge port

water (0.2 gal)

Be careful since the fan will start

when you short the pin on the indoor

control board.

CAUTION

Fig. 3-45

(4) When the drainage check is complete, open the check

pin (CHK) and remount the insulator.

The bottom drain port is for use only

CAUTION

during test runs and servicing

inspections. Do not connect the drain

pipe to the bottom drain port.

Refrigerant tubing joint

(gas tube)

Drain pipe connection

(Be sure to connect the

supplied flexible hose.)

3-12. Electrical Power Wiring

(1) Wiring connections

Refrigerant tubing joint

(liquid tube)

The power inlet is on the side of the indoor unit where the

refrigerant tubing is located. The electrical component box

is on the lower air intake surface of the indoor unit.

(Fig. 3-46)

Inter-unit Control Wiring

Power supply outlet

(2) Wiring

WARNING

Fig. 3-46

G Route the power wiring into the indoor unit through the power inlet on the side of the unit. At this time, be

sure that the wiring passes through the power inlet in the unit power section. If the wiring does not pass

through this inlet, it may become pinched by the ceiling panel, and may result in fire.

G Pass the wiring through the power inlet on the electrical component box and connect it to the terminal plate.

Then fasten the wiring in place with the clamp.

3-13. How to Install the Ceiling Panel

Component Parts

Part name

Quantity

Appearance

Part name

Quantity

Appearance

M5 × 40

Washer-head

screw

5/16" × 9/16"

Ceiling panel

4 × 12 or 5/32" × 15/32"

For fastening

Screw

side panel

3-13-1. Before Installing the Ceiling Panel

Checking the position of the indoor unit

Be sure that this distance is within the range of 25/32 – 1 in.

If it is not within this range, malfunction or other problems may result.

(1) Check that the dimensions of the ceiling opening are

the following:

28-47/64" × 23-17/64"

Indoor unit

* For details, refer to the installation manual that was

supplied with the indoor unit.

Ceiling opening dimension

Ceiling surface

(2) Check that the positions of the ceiling surface and

indoor unit are as shown in Fig. 3-47. If the positions

of the ceiling surface and indoor unit are not correct,

problems such as air leakage, water leakage, and flap

operation trouble may occur.

Fig. 3-47

G Do not rest the panel facing downwards, lean up against

a wall, or leave it sitting on top of a protruding object.

Doing so may scratch the panel surface.

G Do not apply excessive force to the flap.

(Doing so may damage the flap.)

Flap

Fig. 3-48

Removing the intake grille

Screw

Slide the intake grille hooks (2 locations)

in the direction of the arrow to open the

intake grille. (fig. 3-49a)

Screw

Hook

When the intake grille is open, press a

flathead screwdriver against the rear

tabs (2 locations) and pull out the intake

grille. (Fig. 3-49b)

Fig. 3-49a

Intake grille

Removing the side panel

Grasp the finger grip on the side panel

and slide the panel in the direction of

arrow

to remove the panel.

(There are 2 panels: 1 each on the left

and right sides.) (Fig. 3-51)

Hinge

Fig. 3-49b

Press on the tabs with a flathead (minus)

screwdriver while pulling out the intake grille.

Tab

Fig. 3-50

Slide

Side panel

Fig. 3-51

3-13-2. Installing the ceiling panel

Hook receiver Press to remove.

(1) Fasten the hooks on both sides of the ceiling panel to

the indoor unit. The hooks on one side (2 locations) are

stationary, while the hook on the other side is move-

able. (Fig. 3-52)

Stationary hook

(2) Angle the panel somewhat and fasten the stationary

hook into the fastener on the side of the unit.

Moveable hook

Fig. 3-53

(3) After verifying that the hook is fastened, press the other

end up until the ceiling panel is level. Then press

upwards until the moveable hook is fastened into the

fastener on the unit.

(4) Verify that the hooks on both sides of the ceiling panel

are securely fastened to the unit. If the hooks are not

securely fastened, the panel may fall. At this point, the

panel is now provisionally fastened to the unit.

Moveable hook

Fig. 3-52

G When removing the panel, press the movable hook

toward the inside while supporting the panel. (Fig. 3-53)

(5) Align the installation holes on the panel with the

bolt holes on the unit.

Indoor unit

(6) Insert the supplied washer head bolts into the 4

panel installation holes, and tighten until the panel

is securely fastened against the unit. (Fig. 3-54)

(7) Verify that the panel is securely fastened against

the unit.

G At this time, make sure that there is no gap

between the indoor unit and the ceiling panel, or

between the ceiling panel and the ceiling surface.

(Fig. 3-55)

G If there is a gap between the ceiling panel and the

ceiling, leave the panel attached and adjust the

installation height of the indoor unit upwards until

the gap with the ceiling is eliminated. (Fig. 3-56)

Ceiling panel

G If the adjustment is small enough that it will not

affect the levelness of the indoor unit or the drain

piping, then the unit height can be adjusted from

the side panel installation holes, with the ceiling

panel still attached.

Washer-head screw

Fig. 3-54

Must be no gap.

Insert a wrench or other

standard tool into the side

panel installation holes

and make fine adjustments

to the indoor unit nuts.

Indoor unit

Ceiling surface

Ceiling panel

Fig. 3-55

Fig. 3-56

CAUTION

• If the screws are not fully tightened,

problems such as those shown below

may occur. Be sure to tighten the

screws securely.

• If there is a gap between the ceiling

surface and the ceiling panel even

when the screws are fully tightened,

readjust the height of the indoor unit.

(Fig. 3-56)

Air leakage

Ceiling panel

air leakage

Stains

Adjust so that there is no gap.

Condensation and water leakage

3-13-3. Wiring the ceiling panel

(1) Loosen the 2 screws on the electrical component

box lid, and remove the lid. (Fig. 3-57)

(2) Fasten the wiring connector (7P, red) which comes

out from the ceiling panel using the lead wire clamps

(2 locations) on the unit. Then connect it to the

connector (7P, red) inside the indoor unit electrical

component box. (Fig. 3-58)

G If the connector is not connected, “P09” is displayed

on the remote controller, and the automatic flap will

not operate. Be sure to securely connect the connec-

tor.

Screw

Electrical compornent

box cover

Fig. 3-57

G Check that the wiring connector is not pinched

between the electrical component box and the lid.

G Check that the wiring connector is not pinched

between the indoor unit and the ceiling panel.

3-13-4. Installing the side panel and intake grille

A. Installing the side panel

(1) Grasp the side panel finger grip and slide the panel

in the direction of the arrow to install the side panel.

(Fig. 3-59)

Inter-unit control wiring

Power supply outlet

(2) Fasten the side panel onto the ceiling panel using

Electrical compornent box

the supplied screws (4 × 12 or 5/32" × 15/32").

Indoor unit connector

B. Installing the intake grille

Fig. 3-58

G To install the intake grille, follow the procedure for

removing it in the reverse order. (Fig. 3-60)

G When installing the intake grille, be careful that the

flap lead wire does not become pinched. (Fig. 3-60)

Fasten with screws

(4 × 12 or 5/32" × 15/32")

Tabs

Tab

Slide

3-13-5. Other

A. Check after installation

G Check again that there is no gap between the indoor

unit and the ceiling panel, or between the ceiling

panel and the ceiling surface.

Slide the side panel so that the side panel tabs are fastened to

the ceiling panel. Then fasten in place with the supplied screws

(4 × 12 or 5/32" × 15/32").

* If there is a gap, then water leakage and condensa-

tion may occur.

Fig. 3-59

G Check that the wiring connections are secure.

* If the wiring is not connected, the automatic flap will

not operate. (“P09” is displayed on the remote

controller.) In addition, water leakage,

Screw

condensation, and other problems may occur.

B. If a wireless remote controller is used

G For details concerning the installation procedure,

refer to the installation manual which was supplied

with the optional wireless remote controller and

indoor unit internal receiver.

Fig. 3-60

I Concealed Duct Type (U Type)

3-14. Required Minimum Space for

A (Suspension bolt pitch)

Electrical

component box

Installation and Service

G This air conditioner is usually installed above the ceiling so that the

indoor unit and ducts are not visible. Only the air intake and air outlet

ports are visible from below.

Inspection

access

17-23/32

min.

9-27/32

Indoor unit

17-23/32

G The minimum space for installation and service is shown in

Fig. 3-61 and Table 3-3.

Refrigerant

tubing

min. 25-19/32

G It is recommended that space is provided (17-23/32 × 17-23/32 in.)

for checking and servicing the electrical system.

G Fig. 3-62 and Table 3-4 show the detailed dimensions of the indoor

unit.

Air outlet duct flange

Unit: in.

Fig. 3-61

Table 3-3

Unit: in. (mm)

Type

7, 12, 18

A (Length)

30-23/32 (780) 42-17/32 (1,080) 61-13/32 (1,560)

Number of duct flanges

Table 3-4

Unit: in.

Dimension

No. of holes

Type

23-5/8

7, 12, 18

26-1/16

37-7/8

27-9/16 30-23/32 11-13/32 10-5/16 26-25/32 28-5/32 7-3/32

39-3/8 42-17/32 11-13/32 10-23/32 38-19/32 39-31/32 5-1/8

58-9/32 61-13/32 13-3/16 12-7/32 57-15/32 58-27/32 5-1/8

–

13-3/8

(7-7/8 × 3)

35-7/16

(7-3/32 × 5)

54-11/32

(9-1/16 × 6)

9-21/32

(9-21/32 × 1)

19-9/32

(9-21/32 × 2)

9-27/32

56-25/32

9-7/16

Refrigerant tubing joint (liquid tube)

Refrigerant tubing joint (gas tube)

Upper drain port (O.D. 1-1/4 in.)

Bottom drain port (O.D. 1-1/32 in.)

Suspension lug

13/32

L-ø1/4

(Hole)

Power supply outlet (2-ø1-3/16 hole)

Fresh air intake port (ø5-29/32 hole)

3/4

A (O.D.)

Flange for the flexible air outlet duct (ø7-7/8 hole)

Tube cover

Electrical component box

Flange for the air intake duct

(Option or field supply)

H (Duct suspension bolt pitch)

G (Ceiling opening dimension)

4-ø15/32

(Hole)

Inter-unit control wiring

12-7/32

31/32

8-9/32

31/32

6-7/8

1-7/32

3-17/32

18-ø1/8

(Hole)

Inspection access

(17-23/32

17-23/32)

(Field supply)

1-9/16

1-3/8

(5-29/32)

(Suspension bolt pitch)

5-1/8

11-7/32

2-3/4

2-15/16

2-9/16

Inspection access panel

Ceiling

Unit: in.

Fig. 3-62

3-15. Suspending the Indoor Unit

Depending on the ceiling type:

Hole-in-anchor

Hole-in-plug

Concrete

Insert

• Insert suspension bolts as shown in Fig. 3-63

• Use existing ceiling supports or construct a suitable support as

shown in Fig. 3-64.

Suspension bolt (M10 or 3/8")

(field supply)

It is important that you use extreme care

WARNING

Fig. 3-63

in supporting the indoor unit inside the

ceiling. Ensure that the ceiling is strong

enough to support the weight of the unit.

Before hanging the unit, test the strength

of each attached suspension bolt.

Ceiling tiles

Ceiling support

(1) When placing the unit inside the ceiling, determine the pitch of

the suspension bolts referring to the dimensional data on the

previous page. (Fig. 3-61 and Table 3-3)

Tubing must be laid and connected inside the ceiling when

suspending the unit. If the ceiling is already constructed, lay the

tubing into position for connection to the unit before placing the

unit inside the ceiling.

Fig. 3-64

Suspension bolt

(2) Screw in the suspension bolts allowing them to protrude from

the ceiling as shown in Fig. 3-63. (Cut the ceiling material, if

necessary.)

Suspension lug

Nuts and washers

(use for upper and lower)

(3) Thread the 3 hexagonal nuts and 2 washers (field supply) onto

each of the 4 suspension bolts as shown in Figs. 3-65 and 3-66.

Use 1 nut and 1 washer for the upper part, and 2 nuts and 1

washer for the lower part, so that the unit will not fall off the

suspension lugs.

Notch

Double nuts

Fig. 3-65

Suspension bolt

Hexagonal nut

Double nuts

G Fig. 3-67 shows an example of installation.

Bolt anchor

Fig. 3-66

Air outlet duct

Suspension bolt

Air-intake duct

Air-outlet grille

Ceiling material

Indoor unit

Air-intake grille

Fig. 3-67

3-16. Installing the Drain Piping

Align the hose band with end of the

hose, and tighten so that it does not

contact the bead.

(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for the drain

and use the supplied hose band to

Drainage check

Hard PVC

pipe

VP-25

(not supplied)

prevent water leaks.

section on drain port

(transparent)

Drain hose

(supplied)

Hard PVC

The PVC pipe must be purchased separately.

The transparent drain part on the unit allows you to check

drainage. (Fig. 3-68)

socket VP-25

(not supplied)

CAUTION

PVC adhesive

Packing (supplied)

Bead

G Do not use adhesive at the drain connection port on the

indoor unit.

Fig. 3-68

G Insert the drain pipe until it contacts the socket, as shown in

the figure at right, then secure it tightly with the hose band.

G Do not use the supplied drain hose bent at a 90° angle.

(The maximum permissible bend is 45°.)

Drain insulator (supplied)

G Tighten the hose clamps so their locking nuts face upward.

(FIg. 3-68)

Vinyl clamps

(2) After connecting the drain piping securely, wrap the supplied

packing and drain pipe insulator around the pipe, then secure it

with the supplied vinyl clamps. (Fig. 3-69)

Fig. 3-69

Air bleeder

NOTE

Make sure the drain pipe has a downward gradient (1/100 or more)

and that there are no water traps.

Prohibited

Fig. 3-70

G Do not install an air bleeder as this may

CAUTION

cause water to spray from the drain pipe

outlet. (Fig. 3-70)

11-13/16" or less

19-11/16" or less

Good

G If it is necessary to increase the height of the drain pipe, the

section directly after the connection port can be raised a

maximum of 19-11/16". Do not raise it any higher than

19-11/16", as this could result in water leaks. (Fig. 3-71)

G Do not install the pipe with an upward gradient from the connec-

tion port. This will cause the drain water to flow backward and leak

when the unit is not operating. (Fig. 3-72)

Fig. 3-71

Upward gradient

G Do not apply force to the piping on the unit side when connecting

the drain pipe. The pipe should not be allowed to hang unsupport-

ed from its connection to the unit. Fasten the pipe to a wall, frame,

or other support as close to the unit as possible. (Fig. 3-73)

Prohibited

Fig. 3-72

3-17. Checking the Drainage

After wiring and drain piping are completed, use the following proce-

dure to check that the water will drain smoothly. For this, prepare a

bucket and wiping cloth to catch and wipe up spilled water.

Support pieces

(1) Connect power to the power terminal board (R, S terminals)

inside the electrical component box.

(2) Remove the tube cover and through the opening, slowly pour

about 0.3 gal of water into the drain pan to check drainage.

Fig. 3-73

(3) Short the check pin (CHK) on the indoor control board and oper-

ate the drain pump. Check the water flow through the transparent

drain port and see if there is any leakage.

Power supply outlet

Be careful since the fan will start when you

short the pin on the indoor control board.

CAUTION

Inter-unit control wiring

(4) When the check of drainage is complete, open the check pin (CHK)

and remount the insulator and drain cap onto the drain inspection port.

3-18. Increasing the Fan Speed

If external static pressure is too great (due to long extension of ducts, for

example), the air flow volume may drop too low at each air outlet. This problem

may be solved by increasing the fan speed using the following procedure:

(1) Remove 4 screws on the electrical component box and

remove the cover plate.

(2) Disconnect the fan motor sockets in the box.

Fig. 3-74

(3) Take out the booster cable (sockets at both ends)

clamped in the box.

Indoor Fan Performance

(4) Securely connect the booster cable sockets between the

disconnected fan motor sockets in step 2 as shown in

Fig. 3-75.

7, 12 Type

18 Type

(in.WG)

0.60

(in.WG)

0.60

(5) Place the cable neatly in the box and reinstall the cover

plate.

0.40

0.20

0.40

0.20

Electrical component box

Booster cable

Fan

Booster cable

motor

Fan motor socket

(At shipment)

(Booster cable installed)

Fig. 3-75

353

530

177

353

Air Flow (CFM)

How to read the diagram

36 Type

The vertical axis is the external static pressure (in.WG)

while the horizontal axis represents the air flow (CFM).

The characteristic curves for “HT,” “H,” “M” and “L” fan

speed control are shown. The nameplate values are

shown based on the “H” air flow. For the 24 type, the air

flow is 635 CFM, while the external static pressure is

0.20 in.WG at “H” position. If external static pressure is

too great (due to long extension of ducts, for example),

the air flow volume may drop too low at each air outlet.

This problem may be solved by increasing the fan

speed as explained above.

(in.WG)

24 Type

(in.WG)

0.60

0.40

0.20

353

706

1059

Air Flow (CFM)

HT: Using the booster cable

NOTE

H: At shipment

Fig. 3-76

I Concealed Duct High-Static Pressure Type (D Type)

Min. 23-5/8

(Space for service)

3-19. Required Minimum Space

19-11/16

11-27/64

5-1/8

for Installation and Service

G This air conditioner is usually installed above the ceiling

so that the indoor unit and ducts are not visible. Only the

air intake and air outlet ports are visible from below.

G The minimum space for installation and service is shown

in Fig. 3-77.

Suspension

bolt pitch

38-37/64

Suspension

Air suction side

bolt pitch

G It is recommended that space be provided (23-5/8" ×

23-5/8") for checking and servicing the electrical system.

G Fig. 3-78 and Table 3-5 show the detailed dimensions of

the indoor unit.

Refrigerant tubing

Electrical

component

box

Inspection access

(23-5/8" × 23-5/8")

Min. 23-5/8

Space for

service

Min. 22-53/64

Drain pan

Ceiling face

Min. 5-1/8

Unit: in.

Fig. 3-77

31-7/32

7 × 3-15/16 = 27-9/16

22 - ø1/8

25/32

3-35/64

2-5/32

1-37/64

(Hole for full

circumference)

2-23/64

1-57/64

Unit: in.

Table 3-5

Length

Type

Electrical component box

16-17/32 15-35/64 2-43/64

17-23/32 16-47/64 3-55/64

4-ø25/32 hole for

suspension bolt

1-13/16

4 × 3-15/16

= 15-3/4

Refrigerant liquid line (ø3/8 or ø1/4)

Refrigerant gas line (ø3/4 or ø5/8)

Power supply outlet

16 - ø1/8

(Hole for full

19-11/16

circumference)

Drain connection (25A, O.D. 1-1/4")

Duct connection for suction

Duct connection for discharge

Inter-unit control wiring

19/32 38-37/64 (Suspension bolt pitch) 19/32

24-13/32

19-11/16

39-49/64

2-3/4

1-3/8

25/64

Drain pan

Unit: in.

Fig. 3-78

3-20. Suspending the Indoor Unit

Depending on the ceiling type:

Hole-in-anchor

Hole-in-plug

Concrete

Insert

G Insert suspension bolts as shown in Fig. 3-79

G Use existing ceiling supports or construct a suitable support as

shown in Fig. 3-80.

Suspension bolt (M10 or 3/8")

(field supply)

It is important that you use extreme care

WARNING

Fig. 3-79

in supporting the indoor unit inside the

ceiling. Ensure that the ceiling is strong

enough to suport the weight of the unit.

Before hanging the unit, test the strength

of each attached suspension bolt.

Ceiling tiles

Ceiling support

(1) When placing the unit inside the ceiling, determine the pitch

of the suspension bolts referring to the dimensional data given

previously. (Figs. 3-77 and 3-78)

Tubing must be laid and connected inside the ceiling when

suspending the unit. If the ceiling is already constructed, lay

the tubing into position for connection to the unit before placing

the unit inside the ceiling.

Fig. 3-80

Suspension bolt

Hexagonal nuts

(2) Screw in the suspension bolts allowing them to protrude from

the ceiling as shown in Fig. 3-79. (Cut the ceiling material, if

necessary.)

and washers

(2 sets)

(3) Suspend and fix the indoor unit using the 2 hexagonal nuts

(field supply) and special washers (supplied with the unit) as

shown in Fig. 3-81.

Fig. 3-81

Air-outlet grille

Air-intake grille

Fig. 3-82

3-21. Installing the Drain Piping

Sealing tape

(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for the

drain and use the supplied drain socket to prevent water

leaks. The PVC pipe must be purchased separately.

When doing this, apply adhesive for the PVC pipe at the

connection point.

Drain pan

Drain joint

(supplied)

(2) If connecting a drain joint (supplied) to the threaded

drain port, first wrap the drain port threads with sealing

tape, then connect the joint. (Fig. 3-83)

Drain opening

(25A or 1-11/32" male screw)

Fig. 3-83

(3) After connecting the drain pipe securely, wrap insulator

(field supply) around the pipe.

Downward gradient

(4) Ensure the drain pipe has a downward gradient (1/100

or more) and prepare traps as indicated in Fig. 3-84.

Min. 1/100

(5) Also, in another part of the pipe arrangement, prepare

traps with an inspection plug to clean dust or debris that

may cause leaking of water. (Fig. 3-85)

Good

(6) After connecting the drain piping, slowly pour water into

the drain pan to check that the water drains smoothly.

3-22. Caution for Ducting Work

Not good

G This unit has high static pressure (applicable external static

pressure Max. 0.68 – 0.88 in.WG. In the case of small

pressure resistance (for instance, a short duct), install a

damper for adjusting air flow volume as air flow volume /

air flow noise increases.

Fig. 3-84

G If the air conditioner is to be installed in a room such as

an office or meeting room which needs a low sound

level, provide a supply and return noise absorption

chamber with an acoustic liner.

Min. 1-31/32 in.

G Include an air filter (field supply) at the return duct.

Inspection plug

3-23. Indoor Fan Performance

How to Read the Diagram

Fig. 3-85

36 Type

48 Type

(in.WG)

1.00

(in.WG)

1.00

The vertical axis is the External Static Pressure

(in.WG) while the horizontal axis represents the

Air Flow (CFM). The characteristic curve for the

0.80

“H,” “Med,” and “Lo” fan speed control.

The nameplate values are shown based on the

“H” air flow. Therefore in the case of 36 Type,

the flow is 1059 CFM, while the External Static

Pressure is 0.72 in.WG at “H” position. If the

external static pressure is too great (due to long

extension of duct, for example), the air flow

volume may drop too low at each air outlet.

0.60

0.40

0.20

0.40

0.20

883

1059

1236

1059

1236

1412

Air Flow (CFM)

NOTE

H: At shipment

Fig. 3-86

I Ceiling-Mounted Type (T Type)

3-24. Required Minimum Space for Installation and Service

(1) Dimensions of suspension bolt pitch and unit

Unit: in.

Table 3-6

Dimension

Type

Air intake

12, 18

33-21/32 35-53/64 8-17/64

44-19/64 46-29/64 8-17/64

Ceiling side

1-5/64

Air outlet

Unit: in.

(Suspension bolt pitch)

Fig. 3-87

(2) Refrigerant tubing • drain hose position

2-21/64

2-61/64

3-61/64

3-13/16

Rear (figure shows view from front)

Left side

Right side

8-1/2

(Liquid tubing •

Gas tubing)

9/64

Liquid

tubing

2-23/64

Gas tubing

3-5/16

6-11/32

9-7/8

5-3/4

Left drain position

Closed with rubber stopper at time of shipment.

Right drain position

Unit: in.

Fig. 3-88

(3) Unit opening position (Refrigerant tubing • drain hose • power inlet port • remote controller wiring inlet port)

Rear outlet port

Inter-unit control wiring

(ø1-3/16", knock-out, use rubber grommet)

10-5/16

4-59/64

2-53/64

Right-side drain

hose outlet port

Left-side drain hose

outlet port

Outside air intake duct connection port

(ø3-15/16", knock-out)

Power supply outlet

(ø1-3/16", knock-out)

Rear tubing hole

Left-side drain

hose outlet port

3-5/16

Side panel

Position of plate

inside side panel

13-21/32

Unit: in.

Side panel

*1 Use a compass saw, jig saw or similar tool and cut along the indented portion of the side panel.

Fig. 3-89

(4) Wall and ceiling side opening position

Figure shows view from front

Figure shows view from top

Wall

Ceiling

ø3-15/16 ceiling opening

ø3-15/16 wall side opening

3-35/64

5-5/16

ø3-15/16 wall side opening

(for left-side drain hose)

ø3-15/16 ceiling opening

4-59/64

Unit: in.

* If the optional drain up kit is installed, create a ø3-15/16" hole along the dotted line (part marked with * in figure).

Fig. 3-90

3-25. Suspending the Indoor Unit

Ceiling

(1) Place the full-scale diagram (supplied) on the ceiling

at the spot where you want to install the indoor unit.

Wall

Full-scale

installation diagram

Use a pencil to mark the drill holes. (Fig. 3-91).

NOTE

Fig. 3-91

Since the diagram is made of paper, it may shrink or

stretch slightly because of high temperature or humidity.

For this reason, before drilling the holes maintain the

correct dimensions between the markings.

Hole-in-anchor

Hole-in-plug

Concrete

Insert

(2) Drill holes at the 4 points indicated on the full-scale

diagram.

(3) Depending on the ceiling type:

Suspension bolt (M10 or 3/8")

(field supply)

a) Insert suspension bolts as shown in Fig. 3-92.

Fig. 3-92

b) Use existing ceiling supports or construct a

suitable support as shown in Fig. 3-93.

Ceiling tiles

Ceiling support

It is important that you use

WARNING

extreme care in supporting the

indoor unit from the ceiling.

Ensure that the ceiling is

strong enough to support the

weight of the unit. Before

hanging the ceiling unit, test

the strength of each attached

suspension bolt.

Fig. 3-93

Pull out the

air-intake grille

pushing claws

of the hinges

(4) Screw in the suspension bolts, allowing them to

protrude from the ceiling as shown in Figs. 3-92

and 3-93. The distance of each exposed bolt must

be of equal length within 1-15/16". (Fig. 3-94)

Hinge

Screw

Latch

unit

Ceiling

surface

Air-intake grille

Fixture

Fig. 3-94

Fig. 3-95

(5) Before suspending the indoor unit, remove the 2 or 3 screws on the

latch of the air-intake grilles, open the grilles, and remove them by

pushing the claws of the hinges as shown in Fig. 3-95. Then remove

both side panels sliding them along the unit toward the front after

removing the 2 attachment screws. (Fig. 3-96)

Slide toward

front side

(6) Carry out the preparation for suspending the indoor unit. The

suspension method varies depending on whether there is a suspended

ceiling or not. (Figs. 3-97 and 3-98)

Side panel

(7) Suspend the indoor unit as follows:

Fig. 3-96

a) Mount 1 washer and 2 hexagonal nuts on each suspension bolt as

shown in Fig. 3-99.

b) Lift the indoor unit, and place it on the washers through the notches,

in order to fix it in place. (Fig. 3-100)

c) Tighten the 2 hexagonal nuts on each suspension bolt to suspend

the indoor unit as shown in Fig. 3-101.

Suspension bolt

(field supply)

Unit

Ceiling surface

Washer (supplied)

Double nut

(field supply)

Fixture

NOTE

Fig. 3-97

The ceiling surface is not always level. Please confirm that the indoor unit

is evenly suspended. For the installation to be correct, leave a clearance of

about 3/8" between the ceiling panel and the ceiling surface and fill the gap

with an appropriate insulation or filler material.

Suspension bolt

(field supply)

Washer (field supply)

Unit

(8) If the tubing and wiring are to go towards the rear of the unit, make

holes in the wall. (Fig. 3-102)

Washer (supplied)

Double nut

(field supply)

(9) Measure the thickness of the wall from the inside to the outside and cut

PVC pipe at a slight angle to fit. Insert the PVC pipe in the wall.

(Fig. 3-103)

Fig. 3-98

Ceiling

surface

Washer

(supplied)

Nut

(field supply)

Suspension bolt

Fig. 3-99

Fig. 3-100

NOTE

Fig. 3-101

The hole should be made at a slight downward slant to

the outside.

PVC pipe (locally purchased)

INSIDE

OUTSIDE

Wall

Indoor

side

Outdoor

side

PVC pipe

Slight

angle

Cut at slight angle

Fig. 3-102

Fig. 3-103

3-26. Duct for Fresh Air

Rear outlet port

There is a duct connection port (knock-out hole) at the right-

rear of the top panel of the indoor unit for drawing in fresh air.

If it is necessary to draw in fresh air, remove the cover by

opening the hole and connecting the duct to the indoor unit

through the connection port. (Fig. 3-104)

Inter-unit control wiring

(ø1-3/16", knock-out, use rubber grommet)

Outside air intake duct connection port

(ø3-15/16", knock-out)

Power supply outlet

(ø1-3/16", knock-out)

3-27. Shaping the Tubing

Rear tubing hole

G The positions of the refrigerant tubing connections are

shown in the figure below. (The tubing can be routed in

3 directions.)

Left-side drain hose outlet port

Fig. 3-104

* When routing the tubing out through the top or right sides,

knock out the appropriate parts in the top panel and cut

notches in the side panel as shown in Fig. 3-89.

* When routing the tubing out through the top, the optional

L-shape tubing kit is required.

If the tubing is to be routed out

together, use a box cutter or simi-

lar tool to cut out the part of the

rear cover indicated by the marked

area in the figure below, to match

the positions of the tubes. Then

draw out the tubing.

Rear cover

Fig. 3-106

Fig. 3-105

3-28. Installing the Drain Piping

G Prepare standard PVC pipe for the drain and connect it to the

indoor unit drain pipe with the supplied hose clamps to prevent

water leaks.

Donward gradient

Min. 1/100

(1) Drain hose connection

G The drain hose is connected below the refrigerant tubing.

Good

(2) Installing the drain hose

G To install the drain hose, first place 1 of the 2 hose bands over the

unit drain port and the other hose band over the hard PVC pipe

(not supplied). Then connect both ends of the supplied drain hose.

G On the unit drain side, grasp the hose band with pliers and insert

the drain hose all the way to the base.

Not good

G If other commercially available hose bands are used, the drain

hose may become pinched or wrinkled and there is danger of

water leakage. Therefore be sure to use the supplied hose bands.

When sliding the hose bands, be careful to avoid scratching the

drain hose.

Fig. 3-107

CAUTION

G Do not use adhesive when connecting the supplied drain hose to

the drain port (either on the main unit or the PVC pipe).

G Wrap the hose with the supplied drain hose insulation and use the

4 twist ties so that the hose is insulated with no gaps.

G Connect the drain piping so that it slopes downward from the unit

to the outside. (Fig. 3-107)

G Attach so that the hose band fastener is

on the side of the drain port. (Fig. 3-108)

G Attach the hose bands so that each is

approximately 13/64 – 63/64 in. from the

end of the supplied drain hose.

Twist tie

(4 ties, supplied)

G Never allow traps to occur in the course of the piping.

G Insulate any piping inside the room to prevent drip-

ping.

Hard PVC pipe

(equivalent to

VP-20)

Drain hose

insulation

(supplied)

Position to

fasten hose

bands

Unit drain port

(Field supply)

G After the drain piping, pour water into the drain pan to

check that the water drains smoothly.

G If the drain hose is to be raised, use the optional drain

up kit.

The drain hose can be raised 23-5/8" above the top of

the main unit. (For details, refer to the manual of the

Drain hose

(supplied)

13/64

63/64

13/64

63/64

optional part.)

Drain port

5-33/64

Hose band

(2 bands, supplied)

Screwdriver

* If the drain hose is

routed through the

left side, refer to Fig.

3-105, and follow the

procedure above to

Unit drain pan

Unit: in.

Fig. 3-108

Rubber stopper

Check local electrical codes

and regulations before wiring.

Also, check any specified

instruction or limitations.

CAUTION

install the hose. Re-attach the rubber stopper that

was earlier removed onto the right side.

The rubber stopper can be inserted easily by using a

screwdriver or similar tool to press the stopper into

the drain port on the main unit. Press the stopper into

the main unit drain port as far as it will go.

How to carry out power supply wiring

(1) Wiring connection ports

(2) How to carry out wiring

The power inlet ports are located at the rear and top.

The remote controller wiring inlet ports are located at

the rear and top (for use with the wired remote

controller).

For details, refer to Fig. 3-104. For the method used to

insert the wiring, refer to the figure below. (Fig. 3-109)

G Open the knock-out hole on the rear or top of the

main unit. Attach the supplied rubber grommet and

pull the power wiring into the main unit.

G Feed the wiring into the wiring inlet port on the

electrical component box. Connect the wiring to

the terminal plate and fasten in place with the

supplied clamp.

G Perform electrical and grounding work in

accordance with the package A/C power

specifications, and following local electrical

codes and regulations.

When removing the fastening

CAUTION

bracket from the cover of the

electrical component box, use

caution to avoid dropping the

bracket.

Inter-unit control wiring

ø1-9/32 knock-out

Eyelet (supplied)

Powe supply outlet

Fig. 3-109

I Wall-Mounted Type (K Type)

3-29. Removing the Rear Panel from the Unit

(1) Remove the set screws used to fasten the rear panel to the

indoor unit during transportation.

Screws used during

transportation

(2) Press up on the frame at the 2 locations shown by the arrows

in the figure at right, and remove the rear panel.

Press

NOTE

Remove the rear panel

Tubing can be extended in 4 directions as shown in Fig. 3-111.

Select the direction which will provide the shortest run to the

outdoor unit.

Fig. 3-110

Left-rear tubing

3-30. Selecting and Making a Hole

Right-rear

tubing

(recommended)

Left tubing

(1) Remove the rear panel from the indoor unit and place it on

the wall at the location selected. Fix the rear panel and hook

the unit onto it temporarily. Make sure the unit is horizontal

using a carpenter’s level or tape measure to measure down

from the ceiling.

Right tubing

(2) Determine which notch of the rear panel should be used.

(Fig. 3-112)

Fig. 3-111

(3) Before drilling a hole, check that there are no studs or pipes

behind the determined location. The above precautions are

also applicable if tubing goes through the wall in any other

location.

Center of left rear

tubing hole

Center of right rear

tubing hole

(4) Using a sabre saw, key hole saw or hole-cutting drill attach-

ment, make a hole (dia. 3-5/32") in the wall. (Fig. 3-113)

Tubing hole diameter ø3-5/32

(5) Measure the thickness of the wall from the inside edge to the

outside edge and cut the PVC pipe at a slight angle

Fig. 3-112

15/64" shorter than the thickness of the wall. (Fig. 3-114)

Indoor

side

Outdoor

side

(6) Place the plastic cover over the end of the pipe (for indoor

side only) and insert in the wall. (Fig. 3-115)

NOTE

The hole should be made at a slight downward gradient to the

outside.

Fig. 3-113

PVC pipe (locally purchased)

Avoid areas where electrical wiring or

conduits are located.

CAUTION

3-31. Installing the Rear Panel onto the Wall

Confirm that the wall is strong enough to support the unit.

See either Item a) or b) below depending on the wall type.

Cut at slight angle

a) If the Wall is Wooden

Fig. 3-114

(1) Attach the rear panel to the wall with the 10 screws provided. (Fig. 3-116)

If you are not able to line up the holes in

INSIDE

OUTSIDE

Wall

the rear panel with the beam locations

marked on the wall, use Rawl plugs or

toggle bolts to go through the holes on

the panel or drill 3/16" dia. holes in the

panel over the stud locations and then

mount the rear panel.

Plastic

cover

PVC pipe

Slight

angle

Fig. 3-116

Fig. 3-115

(2) Check with a tape measure or carpenter’s level. This is

important so that the unit is correctly installed. (Fig. 3-117)

(3) Make sure the panel is flush against the wall. Any space

between the wall and unit will cause noise and vibration.

Fig. 3-117

b) If the Wall is Brick, Concrete or Similar

Drill 3/16" dia. holes in the wall. Insert Rawl plugs for

appropriate mounting screws. (Fig. 3-118)

3/16"

dia. hole

3-32. Removing the Grille to Install the Indoor Unit

In principle, with this model wiring can be completed without

removing the grille.

Rawl plug

However, if it is necessary to change the settings on the PCB,

follow the procedure below.

Fig. 3-118

Removing the grille

(1) Lift up on both sides of the air-intake grille to open it.

(Fig. 3-119)

Intake grille

(2) Remove the filter. (Fig. 3-119)

(3) Adjust the flap so that it is horizontal. (Fig. 3-120)

(4) Open the installation screw covers below the grille

(3 locations). (Fig. 3-120)

Filter

Flap

(5) Remove the screws. (Fig. 3-120)

(6) Remove the grille. (Fig. 3-121)

Attaching the grille

Open the grille

Fig. 3-119

(1) Close the flap.

(2) Keep the grille installation tabs aligned with the top portion of

the grille, and reinstall the lower portion of the grille.

Fit the installation tabs into the grooves and press the lower

portion of the grille back into its original position to install it.

Installation screw cover

(3) Press on the installation tabs to completely close the grille.

Check that the grille and frame are fitted tightly together.

Fig. 3-120

3-33. Preparing the Tubing

(1) Arrangement of tubing by directions

a) Right or left tubing

The corner of the right or left frame should be cut with a

hack saw or similar. (Fig. 3-122)

Remove the grille

b) Right-rear or left-rear tubing

Fig. 3-121

In this case, the corners of the frame do not need to be

cut.

Installation tabs

(2) Be sure to insulate the part of the drain hose that is

run indoors, and the refrigerant tubing.

Frame

If these are not insulated, condensation may result in

dripping and damage to walls and furniture.

The flare nuts on the 24-type (only) are large;

therefore, use the supplied insulation material.

Right tubing

outlet

Installation tabs

When left and right side tubing

Fig. 3-122

Fig. 3-123

(3) To mount the indoor unit on the rear panel.

1. When installing the indoor unit, position the indoor unit onto the

installation tabs on the upper part of the rear panel. (Fig. 3-123)

2. Press on the air outlet to hold it in place, and press the lower

part of the indoor unit until a “click” sound is heard and the

indoor unit is securely fastened to the installation tabs on the

lower side of the rear panel. (Fig. 3-124)

Press

Raising the clamp to lift up the indoor unit will facilitate this work.

(Fig. 3-125)

Fig. 3-124

Clamp

To remove the indoor unit, press up on the 2 locations

(L marks) on the lower part of the unit frame to disconnect the

installation tabs. Refer to Section 3-1. “Removing the Rear Panel

from the Unit” (Fig. 3-110).

Then lift up the indoor unit to remove it.

3-34. Shaping the Tubing

Right-rear tubing

Fig. 3-125

Rear panel tab

(1) Shape the refrigerant tubing so that it can easily go into the hole.

(Fig. 3-126)

Insulating

tape

Refrigerant

tubing

(2) After performing a leak test, wrap both the refrigerant tubing and

drain hose together with insulating tape.

The drain hose should be positioned below the refrigerant tubes,

and should be given sufficient space so that no strong tension is

applied to it.

Indoor and

outdoor unit

connection wiring

Plastic cover

(3) Push the wiring, refrigerant tubing and drain hose through the hole

in the wall. Adjust the indoor unit so it is securely seated on the

rear panel.

Fig. 3-126

Fig. 3-127

Left or left-rear tubing

(1) Pass the tubing and drain hose into the rear of the indoor unit.

Provide sufficient length for the connections to be made.

Next, bend the tubing with a pipe bender, and connect them.

Insulation

(2) After performing a leak test, wrap the refrigerant tubing and drain

hose together with insulating tape, as shown in the figure at right.

(Fig. 3-128)

Refrigerant tubing

Then fit the tubing into the tubing storage space in the rear of the

indoor unit and clamp in place.

Rear panel

Insulating tape

(3) Adjust the indoor unit so that it is securely installed onto the rear

panel.

Inter-unit wiring

Drain hose

3-35. Installing the Drain Hose

Fig. 3-128

a) The drain hose should be slanted downward to the

outside. (Fig. 3-129)

Indoor unit

b) Never form a trap in the course of the hose.

c) If the drain hose will run in the room, insulate the hose* so that

chilled condensation will not damage furniture or floors.

* Foamed polyethylene or its equivalent is recommended.

Slant

Do not supply power to the unit or operate

it until all tubing and wiring to the outdoor

unit are completed.

WARNING

Refrigerant

tubing

Fig. 3-129

3-36. When Using Wireless Remote Controller Instead Of Wired Remote Controller

When the wireless remote controller is to be used, slide the switch on the indoor unit control PCB.

• If this setting is not made, an alarm will occur. (The operation lamp on the display blinks.)

• This setting is not necessary if both the wired remote controller and wireless remote controller are used.

• The location of the switch varies depending on the type of PCB used. Check the model name before making the

setting.

KHX0752 / 0952 / 1252 / 1852

CR-KR74GXH56A-0

Slide No. 3 on SW101

Setting at time of

from ON OFF.

factory shipment

KHX2452

CR-KR254GXH56A-0

Slide No. 3 on SW101

Setting at time of

from ON OFF.

factory shipment

4. HOW TO INSTALL THE OUTDOOR UNIT

4-1. Installing the Outdoor Unit

G Use concrete or a similar material to create the base, and

ensure good drainage.

G Ordinarily, ensure a base height of 2 in. or more. If a drain

pipe is used, or for use in cold-weather regions, ensure a

height of 6 in. or more at the feet on both sides of the unit.

(In this case, leave clearance below the unit for the drain

pipe, and to prevent freezing of drainage water in

cold-weather regions.)

Drain port (2 locations)

6-47/64 25-63/64

4-3/8

G Refer to the Fig. 4-1 for the anchor bolt dimensions.

8-5/8

5-29/32

G Be sure to anchor the feet with the anchor bolts (M10 or

3/8"). In addition, use anchoring washers on the top side.

(Use large square 1-1/4" × 1-1/4" SUS washers with

diameters of 3/8".) (Field supply)

33/64

4-2. Drainage Work

Follow the procedure below to ensure adequate draining for

the outdoor unit.

G For the drain port dimensions, refer to the figure at right.

G Ensure a base height of 6 in. or more at the feet on both

sides of the unit.

4-3. Routing the Tubing and Wiring

G The tubing and wiring can be extended out in 4 directions:

front, rear, right, and down.

G The service valves are housed inside the unit. To access

them, remove the inspection panel. (To remove the

inspection panel, remove the 3 screws, then slide the

panel downward and pull it toward you.)

Anchor bolt (M10 or 3/8")

Unit: in.

Drain port

Fig. 4-1

(1) If the routing direction is through the front, rear, or right,

use a nipper or similar tool to cut out the knockout holes for

the inter-unit control wiring outlet, power wiring outlet, and

tubing outlet from the appropriate covers A and B.

Inter-unit control wiring

(2) If the routing direction is down, use a nipper or similar tool to

cut out the lower flange from cover A.

Inspection panel

Rear

G Route the tubing so that it does

CAUTION

Cover B

Cover A

not contact the compressor,

panel, or other parts inside the

unit. Increased noise will result if

the tubing contacts these parts.

Front

Right

Power supply

Down

G When routing the tubing, use a

Tubing outlet

tube bender to bend the tubes.

Fig. 4-2

5. ELECTRICAL WIRING

5-1. General Precautions on Wiring

(1) Before wiring, confirm the rated voltage of the unit

as shown on its nameplate, then carry out the

wiring closely following the wiring diagram.

(7) Regulations on wire diameters differ from locality

to locality. For field wiring rules, please refer to

your LOCAL ELECTRICAL CODES before begin-

ning.

(2) Provide a power outlet to be used exclusively for

each unit, and a power supply disconnect and

circuit breaker for overcurrent protection should be

provided in the exclusive line.

You must ensure that installation complies with all

relevant rules and regulations.

(8) To prevent malfunction of the air conditioner

caused by electrical noise, care must be taken

when wiring as follows:

(3) To prevent possible hazards from insulation

failure, the unit must be grounded.

(4) Each wiring connection must be done in accor-

dance with the wiring system diagram. Wrong

wiring may cause the unit to misoperate or

become damaged.

G The remote control wiring and the inter-unit control

wiring should be wired apart from the inter-unit

power wiring.

G Use shielded wires for inter-unit control wiring

(5) Do not allow wiring to touch the refrigerant tubing,

compressor, or any moving parts of the fan.

between units and ground the shield on both sides.

(9) If the power supply cord of this appliance is dam-

aged, it must be replaced by a repair shop

appointed by the manufacturer, because special

purpose tools are required.

(6) Unauthorized changes in the internal wiring can be

very dangerous. The manufacturer will accept no

responsibility for any damage or misoperation that

occurs as a result of such unauthorized changes.

5-2. Recommended Wire Length and Wire Diameter for Power Supply System

Outdoor unit

Time delay fuse or

circuit capacity

Type

(A) Power supply wiring

CHX03652

30 A

For field wiring rules, please refer

to your LOCAL ELECTRICAL CODES

CHX06052

50 A

Indoor unit

Time delay fuse or

circuit capacity

Type

(B) Power supply wiring

A, X, T, U

15 A

For field wiring rules, please refer

to your LOCAL ELECTRICAL CODES

Control wiring

(D) Remote control wiring

(E) Control wiring for group control

indoor units) control wiring

AWG #18 (0.75 mm²)

Use shielded wiring*

Use shielded wiring

Max. 3,280 ft.

Max. 1,640 ft.

Max. 1,640 ft. (Total)

NOTE

* With ring-type wire terminal.

5-3. Wiring System Diagram

Indoor

Outdoor unit

unit (No. 1)

INV unit

Power supply

208 / 230 V, 1ø, ~60Hz

Power supply

208 / 230 V, 1ø, ~60Hz

Ground

Remote

controller

WHT

BLK

Ground

Indoor

unit (No. 2)

Power supply

208 / 230 V, 1ø, ~60Hz

Ground

Remote

controller

WHT

BLK

Ground

Indoor

unit (No. 3)

Group control:

Power supply

208 / 230 V, 1ø, ~60Hz

Ground

Indoor

unit (No. n)

Power supply

208 / 230 V, 1ø, ~60Hz

Ground

Remote

controller

WHT

BLK

7P terminal board

Ground

NOTE

(1) Refer to Section 5-2. “Recommended Wire Length

and Wire Diameter for Power Supply System” for

the explanation of “A,” “B,” “C,” “D,” and “E,” in the

above diagram.

1(L1) 2(L2)

U1 U2 R1 R2

Remote

(2) The basic connection diagram of the indoor unit

shows the 7P terminal board, so the terminal

boards in your equipment may differ from the

diagram.

Power

Inter-unit

control wiring controller

supply

X, A, U, D, T Type

(3) Refrigerant Circuit (R.C.) address should be set

before turning the power on.

5P terminal board

(4) Regarding the R.C. address setting, refer to page

72. Auto. address setting can be executed by

remote controller automatically.

1(L1)2(L2)

Power

supply control wiring

U1 U2

Inter-unit

Refer to page 72 – 76.

K Type

CAUTION

(1) When linking outdoor units in a network (S-net link system), disconnect the terminal extended from the

short plug (CN003, 2P Black, location: right bottom on the outdoor main control PCB) from all outdoor

units except any one of the outdoor units.

(When shipping: In shorted condition.)

Otherwise the communication of S-net link system is not performed. For a system without link (no

connection wiring between outdoor units), do not remove the short plug.

(2) Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 5-1)

Outdoor unit

Prohibited

Indoor unit

Fig. 5-1

(3) Do not install inter-unit control wiring such as star

branch wiring. Star branch wiring causes mis-address

setting.

Outdoor unit

Indoor unit

Outdoor unit

Indoor unit

Branch point

Fig. 5-2

(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.

(Branches less than 3.3 ft. are not included in the total branch number.) (Fig. 5-3)

Outdoor unit

Indoor unit

more than 3.3 ft.

Branch

point

Indoor unit

16 or fewer

more than 3.3 ft.

Indoor unit

more than 3.3 ft.

Indoor unit

Fig. 5-3

(5) Use shielded wires for inter-unit control wiring (c)

and ground the shield on both sides, otherwise

misoperation from noise may occur. (Fig. 5-4)

Connect wiring as shown in Section “5-3. Wiring

System Diagram.”

Shielded wire

Loose wiring may cause

Ground

WARNING

the terminal to overheat or

result in unit malfunction.

A fire hazard may also

exist. Therefore, ensure

that all wiring is tightly

connected.

Fig. 5-4

When connecting each power wire to the terminal, follow

the instructions on “How to connect wiring to the terminal”

and fasten the wire securely with the fixing screw of the

terminal plate.

How to connect wiring to the terminal

Stranded wire

I For stranded wiring

(1) Cut the wire end with cutting pliers, then strip the

insulation to expose the stranded wiring about 3/8 in.

and tightly twist the wire ends. (Fig. 5-5)

Ring

pressure

terminal

(2) Using a Phillips head screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using a ring connector fastener or pliers, securely

clamp each stripped wire end with a ring pressure

terminal.

Fig. 5-5

(4) Place the ring pressure terminal, and replace and

tighten the removed terminal screw using a

screwdriver. (Fig. 5-6)

Special

washer

Screw

Ring pressure

terminal

Screw and

Special washer

Terminal plate

Wire

Ring

pressure

terminal

Wire

Fig. 5-6

6. HOW TO PROCESS TUBING

Deburring

After

Before

6-1. Connecting the Refrigerant Tubing

Use of the Flaring Method

Many of conventional split system air conditioners

employ the flaring method to connect refrigerant tubes

which run between indoor and outdoor units. In this

method, the copper tubes are flared at each end and

connected with flare nuts.

Flaring Procedure with a Flare Tool

(1) Cut the copper tube to the required length with a

tube cutter. It is recommended to cut approx. 1 –

2 ft. longer than the tubing length you estimate.

Fig. 6-1

(2) Remove burrs at the end of the copper tube with a

tube reamer or file. This process is important and

should be done carefully to make a good flare.

(Fig. 6-1)

Copper

tubing

Reamer

NOTE

When reaming, hold the tube end downward and be

sure that no copper scraps fall into the tube. (Fig. 6-2)

Fig. 6-2

(3) Remove the flare nut from the unit and be sure to

mount it on the copper tube.

(4) Make a flare at the end of copper tube with a flare

tool.* (Fig. 6-3)

(*Use “RIGID^®” or equivalent.)

Flare nut

Copper

tubing

NOTE

A good flare should have the following characteristics:

G inside surface is glossy and smooth

G edge is smooth

Flare tool

Fig. 6-3

G tapered sides are of uniform length

Caution Before Connecting Tubes Tightly

(1) Apply a sealing cap or water-proof tape to prevent dust or

water from entering the tubes before they are used.

Apply refrigerant

(2) Be sure to apply refrigerant lubricant to the matching

surfaces of the flare and union before connecting them

together. This is effective for reducing gas leaks. (Fig. 6-4)

lubricant here and here

Fig. 6-4

(3) For proper connection, align the union tube and flare tube

straight with each other, then screw in the flare nut lightly

at first to obtain a smooth match. (Fig. 6-5)

G Adjust the shape of the liquid tube using a tube bender at

the installation site and connect it to the liquid tubing side

valve using a flare.

Flare nut

Union

Cautions During Brazing

Fig. 6-5

G Replace air inside the tube with nitrogen gas to

prevent copper oxide film from forming during the

brazing process. (Oxygen, carbon dioxide and Freon

are not acceptable.)

Torque wrench

Spanner

G Do not allow the tubing to get too hot during brazing.

The nitrogen gas inside the tubing may overheat,

causing refrigerant system valves to become dam-

aged. Therefore allow the tubing to cool when brazing.

Indoor unit

Outdoor unit

G Use a reducing valve for the nitrogen cylinder.

Fig. 6-6

G Do not use agents intended to prevent the formation

of oxide film. These agents adversely affect the

refrigerant and refrigerant oil, and may cause damage

or malfunctions.

Tightening torque,

approximate

Tube thickness

Tube diameter

ø1/4"

(ø6.35 mm)

120 – 160 lbs in.

1/32"

(0.8 mm)

(140 – 180 kgf cm)

6-2. Connecting Tubing Between Indoor and Outdoor

Units

ø3/8"

(ø9.52 mm)

1/32"

(0.8 mm)

300 – 360 lbs in.

(340 – 420 kgf cm)

ø1/2"

(ø12.7 mm)

1/32"

(0.8 mm)

430 – 530 lbs in.

(1) Tightly connect the indoor-side refrigerant tubing extended

from the wall with the outdoor-side tubing.

(490 – 610 kgf cm)

ø5/8"

(ø15.88 mm)

5/128"

(1.0 mm)

590 – 710 lbs in.

(2) To fasten the flare nuts, apply specified torque as at right:

(680 – 820 kgf cm)

ø3/4"

(ø19.05 mm)

over 5/128"

(1.0 mm)

870 – 1040 lbs in.

G When removing the flare nuts from the tubing connections,

or when tightening them after connecting the tubing, be

sure to use 2 monkey wrenches or spanners as shown.

(Fig. 6-6)

(1000 – 1200 kgf cm)

Because the pressure is approximately 1.6 times

higher than conventional refrigerant pressure, the

use of ordinary flare nuts (type 1) or thin-walled

tubes may result in tube rupture, injury, or

If the flare nuts are over-tightened, the flare may be dam-

aged, which could result refrigerant leakage and cause in

injury or asphyxiation to room occupants.

G For the flare nuts at tubing connections, be sure to use the

flare nuts that were supplied with the unit, or else flare nuts

for R410A (type 2). The refrigerant tubing that is used must

be of the correct wall thickness as shown in the table at

right.

asphyxiation caused by refrigerant leakage.

G In order to prevent damage to the flare caused by

over-tightening of the flare nuts, use the table

above as a guide when tightening.

G When tightening the flare nut on the liquid tube,

use a monkey wrench with a nominal handle length

of 7-7/8 in.

6-3. Insulating the Refrigerant Tubing

Tubing Insulation

Two tubes arranged together

Liquid tubing

Gas tubing

G Thermal insulation must be applied to all unit tubing,

including distribution joint (purchased separately).

* For gas tubing, the insulation material must be heat

resistant to 248°F or above. For other tubing, it must

be heat resistant to 176°F or above.

Insulation

Fig. 6-7

Insulation material thickness must be 25/64" or greater.

If the conditions inside the ceiling exceed DB 86°F and

RH 70%, increase the thickness of the gas tubing

insulation material by 1 step.

Taping the flare nuts

If the exterior of the outdoor

CAUTION

unit valves has been finished

with a square duct covering,

make sure you allow sufficient

space to use the valves and to

allow the panels to be

attached and removed.

Sealer (supplied)

Insulation tape (white)

(supplied)

Wind the white insulation tape around the flare nuts at the

gas tube connections. Then cover up the tubing

connections with the flare insulator, and fill the gap at the

union with the supplied black insulation tape. Finally,

fasten the insulator at both ends with the supplied vinyl

clamps. (Fig. 6-8)

Flare insulator (supplied)

Tube insulator

(not supplied)

Heat resistant

248°F or above

Unit side

insulator

Flare nut

Vinyl clamps (supplied)

Insulation material

Fig. 6-8

The material used for insulation must have good insulation

characteristics, be easy to use, be age resistant, and must

not easily absorb moisture.

Refrigerant tubing and insulator

(not supplied)

Drain insulator

and clamp.

Large

Drain pipe and insulator

(not supplied)

After a tube has been

(supplied)

CAUTION

insulated, never try to bend it

into a narrow curve because it

can cause the tube to break or

crack.

Packing

clamp.

Small

hose band

(supplied)

Insulation

tape

Vinyl

Flare

clamp

insulator

Seal

The procedure used for

installing the insulator for

both gas and liquid

tubes is the same.

Fig. 6-9

Never grasp the drain or refrigerant connecting

outlets when moving the unit.

6-4. Taping the Tubes

(1) At this time, the refrigerant tubes (and electrical

wiring if local codes permit) should be taped

together with armoring tape in 1 bundle. To prevent

the condensation from overflowing the drain pan,

keep the drain hose separate from the refrigerant

tubing.

Clamp

(2) Wrap the armoring tape from the bottom of the

outdoor unit to the top of the tubing where it enters

the wall. As you wrap the tubing, overlap half of

each previous tape turn.

Drain hose

Insulated tubes

(3) Clamp the tubing bundle to the wall, using 1 clamp

approx. each ft. (Fig. 6-10)

NOTE

Fig. 6-10

Do not wind the armoring tape too tightly since this will

decrease the heat insulation effect. Also ensure that

the condensation drain hose splits away from the

bundle and drips clear of the unit and the tubing.

Apply putty here

6-5. Finishing the Installation

After finishing insulating and taping over the tubing, use

sealing putty to seal off the hole in the wall to prevent

rain and draft from entering. (Fig. 6-11)

Tubing

Fig. 6-11

7. AIR PURGING

Manifold gauge

Air and moisture in the refrigerant system may have

undesirable effects as indicated below.

G pressure in the system rises

G operating current rises

G cooling (or heating) efficiency drops

G moisture in the refrigerant circuit may freeze and block

capillary tubing

G water may lead to corrosion of parts in the refrigerant

system

Fig. 7-1

Therefore, the indoor unit and tubing between the indoor

and outdoor unit must be leak tested and evacuated to

remove any noncondensables and moisture from the

system.

Vacuum pump

Outlet

Inlet

I Air Purging with a Vacuum Pump (for Test Run)

Preparation

Check that each tube (both liquid and gas tubes) between

the indoor and outdoor units has been properly connected

and all wiring for the test run has been completed. Remove

the valve caps from both the gas tube and liquid tube

service valves on the outdoor unit. Note that both liquid and

gas tube service valves on the outdoor unit are kept closed

at this stage.

Fig. 7-2

Manifold valve

Pressure

gauge

Leak test

Charge hose

(1) Attach a manifold valve (with pressure gauges) and dry

nitrogen gas cylinder to this service port with charge

hoses.

Cylinder

valve

Nitrogen gas cylinder

(In vertical standing

position)

Use a manifold valve for air

CAUTION

purging. If it is not available, use

a stop valve for this purpose. The

“Hi” knob of the manifold valve

must always be kept closed.

Service port ø5/16"

(2) Pressurize the system to no more than

512 psig (36 kgf/cm²G) with dry nitrogen gas and close

the cylinder valve when the gauge reading reaches

512 psig (36 kgf/cm²G). Then, test for leaks with liquid

soap.

Open

Gas

tube

Outdoor unit

To avoid nitrogen entering the

Open

CAUTION

refrigerant system in a liquid state,

the top of the cylinder must be

higher than the bottom when you

pressurize the system. Usually,

the cylinder is used in a vertical

standing position. (Refer to the

previous page.)

Liquid

tube

Fig. 7-3

(3) Do a leak test of all joints of the tubing (both indoor and

outdoor) and both gas tube and liquid tube service

valves. Bubbles indicate a leak. Wipe off the soap with a

clean cloth after the leak test.

Manifold valve

(4) After the system is found to be free of leaks, relieve the

nitrogen pressure by loosening the charge hose

connector at the nitrogen cylinder. When the system

pressure is reduced to normal, disconnect the hose from

the cylinder.

Pressure

gauge

Evacuation

(1) Attach the charge hose end described in the preceding

steps to the vacuum pump to evacuate the tubing and

indoor unit. Confirm that the “Lo” knob of the manifold

valve is open. Then, run the vacuum pump. The

operation time for evacuation varies with the tubing

length and capacity of the pump. The following table

shows the amount of time for evacuation:

Vacuum pump

Service port ø5/16"

Open

Required time for evacuation

Gas

tube

when 30 gal/h vacuum pump is used

If tubing length is

less than 49 ft.

If tubing length is

longer than 49 ft.

90 min. or more

Outdoor unit

45 min. or more

Open

NOTE

Liquid

tube

The required time in the above table is calculated based on

the assumption that the ideal (or target) vacuum condition is

less than –14.7 psig (–755 mmHg, 5 Torr).

Fig. 7-4

(2) When the desired vacuum is reached, close the “Lo”

knob of the manifold valve and turn off the vacuum pump.

Confirm that the gauge pressure is under –14.7 psig

(–755 mmHg, 5 Torr) after 4 to 5 minutes of vacuum

pump operation.

Use a cylinder designed for

use with R410A respectively.

CAUTION

Manifold valve

Pressure

gauge

Charging additional refrigerant

G Charging additional refrigerant (calculated from the

liquid tube length as shown in Section 1-7

“Additional Refrigerant Charge”) using the liquid

tube service valve. (Fig. 7-5)

Valve

G Use a balance to measure the refrigerant accurately.

G If the additional refrigerant charge amount cannot

be charged at once, charge the remaining

refrigerant in liquid form by using the gas tube

service valve with the system in cooling operation

mode at the time of test run. (Fig. 7-6)

Liquid

Finishing the job

R410A

(1) With a hex wrench, turn the liquid tube service

valve stem counter-clockwise to fully open the

valve.

Open

Gas

(2) Turn the gas tube service valve stem

counter-clockwise to fully open the valve.

tube

Outdoor unit

To avoid gas from leaking when

CAUTION

removing the charge hose,

make sure the stem of the gas

tube is turned all the way out

(“BACK SEAT” position).

Liquid

tube

(3) Loosen the charge hose connected to the gas

tube service port (for ø5/16" tube) slightly to

release the pressure, then remove the hose.

Fig. 7-5

(4) Replace the service port cap on the gas tube

service port and fasten the cap securely with an

monkey spanner or box wrench. This process is

very important to prevent gas from leaking from

the system.

Open

(5) Replace the valve caps at both gas tube and liquid

tube service valves and fasten them securely.

Gas

tube

Open

This completes air purging with a vacuum pump. The

air conditioner is now ready for a test run.

Outdoor unit

Liquid

tube

Fig. 7-6

8. TEST RUN

8-1. Preparing for Test Run

G Before attempting to start the air conditioner,

check the following.

(1) All loose matter is removed from the cabinet,

especially steel filings, bits of wire, and clips.

(Power must be turned ON

at least 5 hours before

attempting test run)

(2) The control wiring is correctly connected and all

electrical connections are tight.

(3) The transportation pads for the indoor fan have

been removed. If not, remove them now.

Power mains switch

(4) The power has been connected to the unit for at

least 5 hours before starting the compressor. The

bottom of the compressor should be warm to the

touch and the crankcase heater around the feet of

the compressor should be hot to the touch.

(Fig. 8-1)

Fig. 8-1

(5) Both the gas and liquid tube service valves are

open. If not, open them now. (Fig. 8-2)

(6) Request that the customer be present for the trial

run.

Explain the contents of the instruction manual, then

have the customer actually operate the system.

(7) Be sure to give the instruction manual and

warranty certificate to the customer.

(8) When replacing the control PCB, be sure to make

all the same settings on the new PCB as were in

use before replacement.

The existing EEP ROM is not changed, and is

connected to the new control PCB.

Gas tube service cap

Liquid tube service cap

Fig. 8-2

8-2. Test Run Procedure

Items to Check Before the Test Run

1. Turn the remote power switch on at

least 5 hours before the test, in order to

energize the crank case heater.

2. Turn the outdoor service valves (2

locations) to the full-open positions.

G Use caution when making the settings. If

there are duplicated system addresses,

or if the settings for the Nos. of the

Recheck the items to check before the test run.

indoor units are not consistent, an alarm

will occur and the system will not start.

Unit No. setting switch

(S004)

Set the No. of indoor units.

G These settings are not made on the

indoor unit PCB.

CASE 1

Are the inter-unit control wires

connected to more than 1 refrigerant

system?

(Check the link wiring.)

Unit No. setting switch

(S002 and S003)

YES

Set the system address.

When multiple outdoor units exist, disconnect the terminals

extended from the shorted plugs (CN33) at all outdoor main unit

PCBs except for 1.

Refer to Fig. 8-4

Alternatively, move the sockets to the OPEN side.

CASE 2

Is it possible to turn ON the power only

for the 1 refrigerant system where the

YES

test run will be performed?

Turn ON the indoor and

outdoor unit power for that

refrigerant system only.

Will automatic address setting be

performed in Heating mode?

Make necessary corrections.

Short-circuit the automatic address pin (CN51)

on the outdoor unit PCB for 1 second or longer,

then release it.

CASE 3B

Turn OFF the indoor and

outdoor unit power

YES

CASE 3A

LED 1 and 2 blink alternately

(about 2 or 3 minutes).

Is it OK to start the compressors?

Check the alarm contents.

Turn ON the indoor and

outdoor unit power.

Turn ON the indoor and

outdoor unit power.

Are LEDs 1 and 2 on the

outdoor unit PCB OFF?

Make necessary

corrections

Refer to “Table of

Short-circuit the mode change pin

(CN50) on the outdoor main unit PCB.

At the same time, short-circuit the

automatic address pin (CN51) for 1

second or longer, then pull it out.

Short-circuit the automatic address

pin (CN51) on the outdoor unit PCB

for 1 second or longer,

Self-Diagnostic Functions and

Description of Alarm Displays.”

YES

Turn OFF the indoor

and outdoor unit

then release it.

Start indoor and outdoor unit

cooling operation.

Start indoor and outdoor unit

heating operation.

Check the alarm

contents.

LED 1 and 2 blink alternately.

*2 A minimum of 5 hours must have passed after the

power was turned ON to the outdoor unit.

*3 All indoor units operate in all refrigerant systems

where the power is ON.

Are LEDs 1 and 2 on the

outdoor unit PCB OFF?

YES

Check that test run preparation is OK.

(Do not allow the short-circuited pins to remain short-circuited.)

Set the wired remote controller for test run.

Refer to the remote

controller test-run

settings.

Check and make corrections according to

“Table of Self-Diagnostic Functions.”

Does system operate?

YES

Return remote control to normal mode

End test run.

Fig. 8-3

8-3. Outdoor Unit PCB Setting

CN33

CN51

CN50

S003

S002

S004

D043

(LED2)

D042

(LED1)

Fig. 8-4

Examples of the No. of indoor units settings

Indoor unit setting (S004)

No. of indoor units

(Rotary switch, red)

1 unit (factory setting)

2 units

Set to 1

Set to 2

9 units

Set to 9

Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used)

System address (S003)

System address (S002)

System address No.

(2P DIP switch, blue)

10 20

(Rotary switch, black)

Set to 1

Both OFF

System 1 (factory setting)

System 11

OFF

1 ON

Set to 1

Set to 0

OFF

System 21

2 ON

OFF

System 30

1 & 2 ON

OFF

8-4. Auto Address Setting

Basic wiring diagram: Example (1)

• If link wiring is not used

(The inter-unit control wires are not connected to multiple refrigerant systems.)

Indoor unit addresses can be set without operating the compressors.

No. 1 unit settings

(S004)

System address

(system 1 setting)

No. of indoor units

(8 units setting)

(S004)

(S003)

(S002)

OFF

Unit

No. 1

Outdoor Unit

Inter-unit control wiring

Indoor Unit

1-1

1-2

1-3

1-8

Remote controller

cross-over wiring

Remote controller

Fig. 8-5

(1) Automatic Address Setting from the Outdoor Unit

1. On the outdoor unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the

DIP switch (S003) is set to “0.”

(These are the settings at the time of factory shipment.)

OFF

2. To set the number of indoor units that are connected to the outdoor unit to 8, on the outdoor unit control PCB set

the No. of indoor units rotary switch (S004) to “8.”

3. Turn ON the power to the indoor and outdoor units.

4. On the outdoor unit control PCB, short-circuit the automatic address pin (CN51) for 1 second or longer, then

release it.

↓

(Communication for automatic address setting begins.)

↓

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates that automatic address setting is in progress turns OFF and the process is

stopped.

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)

↓

5. Operation from the remote controllers is now possible.

* To perform automatic address setting from the remote controller, perform steps 1 to 3, then use the remote controller and

complete automatic address setting.

Refer to “Automatic Address Setting from the Remote Controller.”

Basic wiring diagram: Example (2)

If link wiring is used

*When multiple outdoor units exist, remove the socket that

is used to short-circuit the terminal plug (CN33) from all

outdoor unit PCBs except for 1.

Alternatively, move the sockets to the “OPEN” side.

No. 1 unit settings

System address

(system 1 setting)

No. of indoor units

(6 units setting)

(S004)

(S003)

(S002)

OFF

Leave the socket

that is used to

short-circuit the

terminal plug.

(CN33)

Outdoor unit

system 1

Unit

No. 1

Inter-unit control wiring

1-1

1-2

1-3

1-6

Indoor unit

Remote controller

communication wiring

Remote

controller

No. 2 unit settings

System address

(system 2 setting)

No. of indoor units

(7 units setting)

(S002) (S003)

(S004)

OFF

Leave the socket

that is used to open

circuit the terminal

plug (CN33).

Unit

No. 1

Outdoor unit

system 2

Inter-unit control wiring

Indoor unit

2-1

2-2

2-7

To other system

link wiring

Remote controller

cross-over wiring

Remote

controller

Make settings as appropriate for the cases listed below.

(Refer to the instructions on the following pages.)

Indoor and outdoor unit power can be turned ON for each system separately.

Case 1

Indoor and outdoor unit power cannot be turned ON for each system separately.

Case 2

Case 3

Automatic address setting in Heating mode

Automatic address setting in Cooling mode

Fig. 8-6

Case 1

Automatic Address Setting (no compressor operation)

G Indoor and outdoor unit power can be turned ON for each system separately.

Indoor unit addresses can be set without operating the compressors.

Automatic Address Setting from Outdoor Unit

1. On the outdoor unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the DIP

switch (S003) is set to “0.”

(These are the settings at the time of factory shipment.)

OFF

2. To set the number of indoor units that are connected to the outdoor unit to 6, on the outdoor unit control PCB set the

No. of indoor units rotary switch (S004) to “6.”

3. At the outdoor unit where all indoor and outdoor unit power has been turned ON, short-circuit the automatic

address pin (CN51) for 1 second or longer, then pull it out.

↓

(Communication for automatic address setting begins.)

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

↓

(Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)

↓

4. Next turn the power ON only for the indoor and outdoor units of the next (different) system. Repeat steps 1 – 3 in

the same way to complete automatic address settings for all systems.

↓

5. Operation from the remote controllers is now possible.

* To perform automatic address setting from the remote controller, perform steps 1 and 2, then use the remote controller

complete automatic address setting.

Refer to “Automatic Address Setting from the Remote Controller.”

Case 2

Automatic Address Setting in Heating Mode

G Indoor and outdoor unit power cannot be turned ON for each system separately.

In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating.

Therefore perform this process only after completing all refrigerant tubing work.

Automatic Address Setting from Outdoor Unit

Case 1

1. Perform steps 1 and 2 in the same way as for

2. Turn the indoor and outdoor unit power ON at all systems.

↓

Heating mode

3. To perform automatic address setting in

, on the outdoor unit control PCB in the refrigerant

system where you wish to set the addresses, short-circuit the automatic address pin (CN51) for 1 second or

longer, then pull it out.

(Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for

more than one system at the same time.)

↓

(Communication for automatic address setting begins, the compressors turn ON, and automatic address

setting in heating mode begins.)

(All indoor units operate.)

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

↓

(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit

control PCB turn OFF.)

4. At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN51) for 1 second or

longer, then pull it out.

↓

(Repeat the same steps to complete automatic address setting for all units.)

↓

5. Operation from the remote controllers is now possible.

* To perform automatic address setting from the remote controller, perform steps 1 and 2, then use the remote controller

complete automatic address setting.

Refer to “Automatic Address Setting from the Remote Controller.”

Case 3

Automatic Address Setting in Cooling Mode

G Indoor and outdoor unit power cannot be turned ON for each system separately.

In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating.

Therefore perform this process only after completing all refrigerant tubing work.

Automatic address setting can be performed during Cooling operation.

Automatic Address Setting from Outdoor Unit

Case 1

1. Perform steps 1 and 2 in the same way as for

2. Turn the indoor and outdoor unit power ON at all systems.

↓

Cooling mode

3. To perform automatic address setting in

, on the outdoor unit control PCB in the refrigerant system

where you wish to set the addresses, short-circuit the mode change 2P pin (CN50). At the same time, short-circuit

the automatic address pin (CN51) for 1 second or longer, then pull it out. (Be sure to perform this process for one

system at a time. Automatic address settings cannot be performed for more than one system at the same time.)

↓

(Communication for automatic address setting begins, the compressors turn ON, and automatic address

setting in Cooling mode begins.)

(All indoor units operate.)

* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.

↓

The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.

(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit control

PCB turn OFF.)

4. At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN51) for 1 second or

longer, then pull it out.

↓

(Repeat the same steps to complete automatic address setting for all units.)

↓

5. Operation from the remote controllers is now possible.

* Automatic address setting in Cooling mode cannot be done from the remote controller.

Automatic Address Setting from the Remote Controller

Selecting each refrigerant system individually for automatic address setting

---Automatic address setting for each system: Item code “A1”

G Press the remote controller timer time

button and

button at the same

time. (Press and hold for 4 seconds or longer.)

G Next, press either the temperature setting

button.

(Check that the item code is “A1.”)

G Use either the

automatic address setting.

G Then press the button.

button to set the system No. to perform

(Automatic address setting for one refrigerant system begins.)

(When automatic address setting for one system is completed, the system

returns to normal stopped status.) <Approximately 4 – 5 minutes is required.>

(During automatic address setting, “SETTING” is displayed on the remote

controller. This message disappears when automatic address setting is

completed.)

G Repeat the same steps to perform automatic address setting for each successive system.

Display during automatic address setting

G On outdoor unit PCB

LED

* Do not short-circuit the automatic address setting pin (CN51) again while automatic

address setting is in progress. Doing so will cancel the setting operation and will cause

LEDs 1 and 2 to turn OFF.

Blink alternately

* When automatic address setting has been successfully completed, both LEDs 1 and 2 turn OFF.

* LED 1 is D042. LED 2 is D043.

* If automatic address setting is not completed successfully, refer to the table below and correct the problem. Then

perform automatic address setting again.

G Display details of LEDs 1 and 2 on the outdoor unit control PCB

(

: ON

: Blinking

: OFF)

Display meaning

LED 1

LED 2

After the power is turned ON (and automatic address setting is not in progress), no communication with the indoor

units in that system is possible.

After the power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are

confirmed in that system; however, the number of indoor units does not match the number that was set.

Automatic address setting is in progress.

Automatic address setting completed.

Alternating

At time of automatic address setting, the number of indoor units did not match the number that was set.

(when indoor units are operating) indication appears on the display.

Simultaneous

Alternating

Refer to Table of Self-Diagnostic Functions and Description of Alarm Displays.

Note:

indicates that the solenoid is fused or that there is a CT (current detection circuit) failure (current is detected when

the compressor is OFF).

G Remote controller display during automatic setting

is blinking

Request concerning recording the indoor/outdoor unit combination Nos.

After automatic address setting has been completed, be sure to record them for future reference.

List the outdoor unit system address and the addresses of the indoor units in that system in an easily visible loca-

tion (next to the nameplate), using a permanent marking pen or similar means that cannot be erased easily.

Example: (Outdoor) 1 – (Indoor) 1-1, 1-2, 1-3…

(Outdoor) 2 – (Indoor) 2-1, 2-2, 2-3…

These numbers are necessary for later maintenance. Please be sure to indicate them.

Checking the indoor unit addresses

Use the remote controller to check the indoor unit address.

1. Press and hold the

button and

button for 4 seconds or longer (simple settings mode).

2. The address is displayed for the indoor unit that is connected to the remote controller.

(Only the address of the indoor unit that is connected to the remote controller can be checked.)

3. Press the

button again to return to normal remote controller mode.

1. Press and hold the button and button for 4 seconds or longer (simple settings mode).

2. “ALL” is displayed on the remote controller.

3. Next, press the button.

4. The address is displayed for 1 of the indoor units which is connected to the remote controller. Check that the fan

of that indoor unit starts and that air is discharged.

5. Press the

6. Press the

button again and check the address of each indoor unit in sequence.

button again to return to normal remote controller mode.

Number changes to indicate which indoor unit is currently selected.

Remote Controller Test Run Settings

1. Press the remote controller

button for 4 seconds or longer. Then press the

button.

G “TEST” appears on the LCD display while the test run is in progress.

G The temperature cannot be adjusted when in Test Run mode.

(This mode places a heavy load on the machines. Therefore use it only when performing the test run.)

2. The test run can be performed using the HEAT, COOL, or FAN operation modes.

Note: The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after

operation is stopped.

3. If correct operation is not possible, a code is displayed on the remote controller display.

(Refer to “7-6. Meaning of Alarm Messages” and correct the problem.)

4. After the test run is completed, press the

troller display.

button again. Check that “TEST” disappears from the remote con-

(To prevent continuous test runs, this remote controller includes a timer function that cancels the test run after

60 minutes.)

* If the test run is performed using the wired remote controller, operation is possible even if the cassette-type ceil-

ing panel has not been installed. (“P09” display does not occur.)

8-5. Caution for Pump Down

Pump down means refrigerant gas in the system is

returned to the outdoor unit. Pump down is used

when the unit is to be moved, or before servicing the

refrigerant circuit.

G This outdoor unit cannot collect more than the rated refrigerant amount as shown

CAUTION

by the nameplate on the back.

G If the amount of refrigerant is more than that recommended, do not conduct pump

down. In this case use another refrigerant collecting system.

8-6. Meaning of Alarm Messages

Table of Self-Diagnostics Functions and Description of Alarm Displays

Alarm messages are indicated by the blinking of LED 1 and 2 (D72, D75) on the outdoor unit PCB. They are also displayed on

the wired remote controller.

G Viewing the LED 1 and 2 (D72 and D75) alarm displays

LED 2

Alarm contents

LED 1

Alarm display

LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats.

M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarm

N = Alarm No.

Alternating

Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.

Alarm is “P17.”

(

: Blinking)

Alarm

Possible cause of malfunction

message

Error in receiving serial communication signal.

(Signal from main indoor unit in case of group control)

Ex: Auto address is not completed.

Remote controller is detecting

error signal from indoor unit.

Serial

<E01>

commu-nication

errors

Mis-setting

<E02>

Error in transmitting serial communication signal.

Indoor unit is detecting error signal from remote controller (and system controller).

<<E03>>

Error in receiving serial communication signal.

When turning on the power supply, the number of connected

indoor units does not correspond to the number set. (Except R.C.

address is “0.”)

Indoor unit is detecting error

signal from outdoor unit.

E04

Error of the outdoor unit in receiving serial communication signal

from the indoor unit.

<E06>

Improper setting of indoor unit or

remote controller.

Indoor unit address setting is duplicated.

E08

Remote controller address connector (RCU. ADR) is duplicated.

<<E09>>

(Duplication of main remote controller)

Starting auto. address setting is prohibited.

During auto. address setting,

number of connected units does

not correspond to number set.

E12

This alarm message shows that the auto address connector CN100

is shorted while other RC line is executing auto address operation.

Error in auto. address setting. (Number of connected indoor units

is less than the number set)

E15

E16

When turning on the power

supply, number of connected

units does not correspond to

number set.

Error in auto. address setting. (Number of connected indoor units

is more than the number set)

No indoor unit is connected during auto. address setting.

Error of outdoor unit address setting.

E20

E25

(Except R.C. address is “0.”)

Indoor unit communication error

Error of main indoor unit in receiving serial communication signal

E18

of group control wiring.

from sub indoor units.

Continued

Alarm

message

Possible cause of malfunction

This alarm message shows when the indoor unit for multiple-use

is not connected to the outdoor unit.

Serial

commu-nication

errors

Improper setting.

L02

Duplication of main indoor unit address setting in group control.

<L03>

L04

Mis-setting

Duplication of outdoor R.C. address setting.

There are 2 or more indoor units

controllers which have operation

mode priority in 1 refrigerant circuit.

Priority set remote controller

L05

Non-priority set remote controller

L06

Group control wiring is connected to individual control indoor unit.

L07

Indoor unit address is not set.

L08

Capacity code of indoor unit is not set.

<<L09>>

L10

Capacity code of outdoor unit is not set.

Mis-matched connection of outdoor units which have different kinds

of refrigerant.

L17

4-way valve operation failure

L18

<<P01>>

<<P09>>

<<P10>>

P12

Thermal protector in indoor unit fan motor is activated.

Improper wiring connections of ceiling panel.

Float switch is activated.

Activation of

protective

device

Protective device in indoor unit

is activated.

Operation of protective function of fan inverter.

O2 sensor (detects low oxygen level) activated.

P14

Compressor thermal protector is activated.

Power supply voltage is unusual. (The voltage is more than 260 V

or less than 160 V between L1 and L2 phase.)

Protective device in outdoor unit

is activated.

P02

Incorrect discharge temperature.

P03

P04

P05

High pressure switch is activated.

Detective phase (3-phase outdoor unit only)

Compressor running failure resulting from missing phase in the

compressor wiring, etc. (Start failure not caused by IPM or no gas.)

P16

P22

Outdoor unit fan motor is unusual.

Overcurrent at time of compressor runs more than 80Hz (DCCT

secondary current or ACCT primary current is detected at a time

other than when IPM has tripped.)

P26

IPM trip (IPM current or temperature)

H31

Inverter for compressor is unusual. (DC compressor does not

operate.)

P29

Indoor coil temp. sensor (E1)

<<F01>>

<<F02>>

<<F03>>

<<F10>>

<<F11>>

F04

Thermistor

fault

Indoor thermistor is either open

or damaged.

Indoor coil temp. sensor (E2)

Indoor coil temp. sensor (E3)

Indoor suction air (room) temp. sensor (TA)

Indoor discharge air temp. sensor (BL)

Compressor discharge sensor (TD)

Outdoor No. 1 coil liquid temp. sensor (C1)

Outdoor air temp. sensor (TO)

Outdoor thermistor is either

open or damaged.

F07

F08

Compressor suction port temperature sensor (TS)

High pressure sensor

F12

F16

EEPROM on indoor unit PCB failure

F29

Protective

device for

Protective device for compressor

No. 1 is activated.

EEPROM on the outdoor unit PCB is a failure.

F31

compressor is

activated

Current is not detected when comp. is ON.

H03

9. APPENDIX

9-1. 4-Way Air Discharge Semi-Concealed Type (X Type)

I NAME OF PARTS

Water drain

X type (4-WAY)

Ceiling panel

(optional)

Air outlet

(4 locations)

Air intake grille

(air intake)

I CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect the power before

cleaning.

WARNING

2. Do not pour water on the indoor unit to clean it. This will damage the internal compo-

nents and cause an electric shock hazard.

Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When clean-

ing the air outlet side, be careful not to force the vanes out of place.

1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe plastic

CAUTION

parts using very hot water.

2. Some metal edges and the fins are sharp and may cause injury if handled improperly; be

especially careful when you clean these parts.

3. The internal coil and other components of the outdoor unit must be cleaned every year.

Consult your dealer or service center.

The air filter collects dust and other particles from the air and should be cleaned at regular intervals

as indicated in the table below or when the filter indication ( ) on the display of the remote control

unit (wired type) shows that the filter needs cleaning. If the filter gets blocked, the efficiency of the air

conditioner drops greatly.

Air filter

Type

Period

6 months

NOTE

The frequency with which the filter should be cleaned depends on the environment in which the

unit is used.

1. Remove the air filter from the air intake grille.

2. Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter, wash the fil-

ter in lukewarm, soapy water, rinse it in clean water, and dry it.

1. Use a screwdriver to remove the bolt screw on each side for the two latches. (Be sure to

reattach the two bolt screws after cleaning.)

2. Press on the two latches of the air intake grille with your thumbs in the direction of the

arrow to open the grille.

3. Open the air intake grille downward.

G When cleaning the air filter, never remove the safety chain. If it is necessary to remove it

for servicing and maintenance inside, be sure to reinstall the safety chain securely (hook

on the grille side) after the work.

CAUTION

G When the filter has been removed, rotating parts (such as the fan), electrically charged

areas, etc. will be exposed in the unit’s opening. Bear in mind the dangers that these parts

and areas pose, and proceed with the work carefully.

4. Remove the air filter attached to the air intake grille.

Latch

Safety chain

Air intake

grille

Bolt screws

Air filter

1. Certain metal edges and the condenser fins are sharp and may cause injury if handled

improperly; special care should be taken when you clean these parts.

2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt

or soot.

CAUTION

3. The internal coil and other components of the outdoor unit must also be cleaned periodi-

cally. Consult your dealer or service center.

Care: After a prolonged idle period

Check the indoor and outdoor unit air intakes and outlets for blockage; if there is a

blockage, remove it.

•

Operate the fan for half a day to dry out the inside.

Care: Before a prolonged idle period

Disconnect the power supply and also turn off the circuit breaker.

Clean the air filter and replace it in its original position.

Outdoor unit internal components must be checked and cleaned periodically. Con-

tact your local dealer for this service.

I TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work

properly, contact your dealer or a service center.

Possible Cause

Trouble

Remedy

Air conditioner does not run at all

1. Power failure.

1. After a power outage, press ON/OFF operation button

on the wired remote control unit.

2. Leakage circuit breaker has tripped.

3. Line voltage is too low.

2. Contact service center.

3. Consult your electrician or dealer.

4. Press the button again.

4. Operation button is turned off.

heat pump is

5. The wired remote control unit or

5. Consult your dealer.

malfunctioning.

(The inspection mark

and the letters E, F,

combination with numbers appear

H, L, P in

remote control unit.)

on the LCD of the wired

Compressor runs but soon stops

1. Obstruction in front of condenser coil

1. Remove obstruction

Poor cooling (or heating) performance 1. Dirty or clogged air filter.

1. Clean air filter to improve the airflow.

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or cold) out.

4. Remove it to ensure good airflow.

room.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air discharge port.

5. Thermostat is set too high for cooling

5. Set the temperature lower (or higher).

(or too low for heating).

6. (Defrosting system does not work.)

6. (Consult your dealer.)

I Tips for Energy Saving

•

Do not block the air intake and outlet of the unit. If either is obstructed, the unit

will not work well, and may be damaged.

Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls

and ceiling of the room are warmed by the sun, it will take longer to cool the room.

Avoid

•

Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

To prevent conditioned air from escaping, keep windows, doors and any other openings

closed.

Should the power fail while the unit is running

If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is

restored using the same settings before the power was interrupted.

NOTE

9-2. 1-Way Air Discharge Semi-Concealed Type (A Type)

I NAME OF PARTS

SEMI-CONCEALED

A type (1-WAY)

Water drain

Air outlet

Air intake

Ceiling panel

(optional)

I CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect the power

WARNING

before cleaning.

2. Do not pour water on the indoor unit to clean it. This will damage the internal compo-

nents and cause an electric shock hazard.

Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When cleaning

the air outlet side, be careful not to force the vanes out of place.

1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe

CAUTION

plastic parts using very hot water.

2. Some metal edges and the fins are sharp and may cause injury if handled improperly;

be especially careful when you clean these parts.

3. The internal coil and other components of the outdoor unit must be cleaned every year.

Consult your dealer or service center.

The air filter collects dust and other particles from the air and should be cleaned at regular intervals

as indicated in the table below or when the filter indication ( ) on the display of the remote control

unit (wired type) shows that the filter needs cleaning. If the filter gets blocked, the efficiency of the air

conditioner drops greatly.

Air filter

Type

Period

2 weeks

The frequency with which the filter should be cleaned depends on the environment in which the unit is used.

NOTE

Air filter finger-hold

Air intake grill

1. Remove the air filter from the air intake grille.

2. Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter,

wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it.

Air filter

1-way air discharge semi-concealed type (A):

1. Take hold of the finger-hold on the air intake grille and press it to

the rear, and the grille will open downward.

Hook

Screw

2. Take hold of the finger-hold on the air filter, pull it toward you.

Latch

Screw

Air filter finger-hold

*Take hold of the finger-hold on the air filter, pull it toward you.

Outdoor unit

1. Certain metal edges and the condenser fins are sharp and may cause injury if handled

improperly; special care should be taken when you clean these parts.

2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt

or soot.

CAUTION

3. The internal coil and other components of the outdoor unit must also be cleaned

periodically. Consult your dealer or service center.

Care: After a prolonged idle period

Care: Before a prolonged idle period

Check the indoor and outdoor unit air intakes and outlets for blockage; if there is a

blockage, remove it.

•

Operate the fan for half a day to dry out the inside.

Disconnect the power supply and also turn off the circuit breaker.

Clean the air filter and replace it in its original position.

Outdoor unit internal components must be checked and cleaned periodically.

Contact your local dealer for this service.

I TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work

properly, contact your dealer or a service center.

Possible Cause

Trouble

Remedy

Air conditioner does not run at all

1. Power failure.

1. After a power outage, press ON/OFF operation button

on the wired remote control unit.

2. Leakage circuit breaker has tripped.

3. Line voltage is too low.

2. Contact service center.

3. Consult your electrician or dealer.

4. Press the button again.

4. Operation button is turned off.

heat pump is

5. The wired remote control unit or

5. Consult your dealer.

malfunctioning.

(The inspection mark

and the letters E, F,

combination with numbers appear

H, L, P in

remote control unit.)

on the LCD of the wired

Compressor runs but soon stops

1. Obstruction in front of condenser coil

1. Remove obstruction

Poor cooling (or heating) performance 1. Dirty or clogged air filter.

1. Clean air filter to improve the airflow.

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or cold) out.

4. Remove it to ensure good airflow.

room.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air discharge port.

5. Thermostat is set too high for cooling

5. Set the temperature lower (or higher).

(or too low for heating).

6. (Defrosting system does not work.)

6. (Consult your dealer.)

I Tips for Energy Saving

•

Do not block the air intake and outlet of the unit. If either is obstructed, the unit

will not work well, and may be damaged.

Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls

and ceiling of the room are warmed by the sun, it will take longer to cool the room.

Avoid

•

Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

To prevent conditioned air from escaping, keep windows, doors and any other openings

closed.

Should the power fail while the unit is running

If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is

restored using the same settings before the power was interrupted.

NOTE

9-3. Concealed Duct (High-Static Pressure) Type (U, D Type)

I NAME OF PARTS

CONCEALED DUCT

U type (standard static pressure)

D type (high static pressure)

Air intake

sideduct flange

(rear)

Flexible duct

(optional)

Water drain

Canvas duct

(optional)

Electrical box

Air intake grille

(air intake)

(optional)

Air outlet side

duct flange

Air outlet grille

(optional)

I CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect the power before

cleaning.

WARNING

2. Do not pour water on the indoor unit to clean it. This will damage the internal compo-

nents and cause an electric shock hazard.

Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When clean-

ing the air outlet side, be careful not to force the vanes out of place.

1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe plastic

CAUTION

parts using very hot water.

2. Some metal edges and the fins are sharp and may cause injury if handled improperly; be

especially careful when you clean these parts.

3. The internal coil and other components of the outdoor unit must be cleaned every year.

Consult your dealer or service center.

*Concealed duct type (U, D):

Type

Period

An air filter is not provided with this air conditioner at the time of shipment. To get clean air

U, D*

(Depends on filter

specifications)

and to extend the service life of the air conditioner, an air filter must be installed in the air

intake. For installation and cleaning the air filter, consult your dealer or service center.

NOTE

The frequency with which the filter should be cleaned depends on the environment in which the unit is used.

1. Remove the air filter from the air intake grille.

2. Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter, wash the filter in lukewarm, soapy water,

rinse it in clean water, and dry it.

I TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work

properly, contact your dealer or a service center.

Possible Cause

Trouble

Remedy

Air conditioner does not run at all

1. Power failure.

1. After a power outage, press ON/OFF operation button

on the wired remote control unit.

2. Leakage circuit breaker has tripped.

3. Line voltage is too low.

2. Contact service center.

3. Consult your electrician or dealer.

4. Press the button again.

4. Operation button is turned off.

heat pump is

5. The wired remote control unit or

5. Consult your dealer.

malfunctioning.

(The inspection mark

and the letters E, F,

combination with numbers appear

H, L, P in

remote control unit.)

on the LCD of the wired

Compressor runs but soon stops

1. Obstruction in front of condenser coil

1. Remove obstruction

Poor cooling (or heating) performance 1. Dirty or clogged air filter.

1. Clean air filter to improve the airflow.

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or cold) out.

4. Remove it to ensure good airflow.

room.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air discharge port.

5. Thermostat is set too high for cooling

5. Set the temperature lower (or higher).

(or too low for heating).

6. (Defrosting system does not work.)

6. (Consult your dealer.)

I Tips for Energy Saving

•

Do not block the air intake and outlet of the unit. If either is obstructed, the unit

will not work well, and may be damaged.

Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls

and ceiling of the room are warmed by the sun, it will take longer to cool the room.

Avoid

•

Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

To prevent conditioned air from escaping, keep windows, doors and any other openings

closed.

Should the power fail while the unit is running

If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is

restored using the same settings before the power was interrupted.

NOTE

9-4. Ceiling-Mounted Type (T Type)

I NAME OF PARTS

CEILING-MOUNTED

T type

Air outlet

Water drain

(Drain pipe can be

connected to either

the left or right side.)

Air intake

grille (air

intake)

I CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect the power before

cleaning.

WARNING

2. Do not pour water on the indoor unit to clean it. This will damage the internal

components and cause an electric shock hazard.

Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When clean-

ing the air outlet side, be careful not to force the vanes out of place.

1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe plastic

CAUTION

parts using very hot water.

2. Some metal edges and the fins are sharp and may cause injury if handled improperly; be

especially careful when you clean these parts.

3. The internal coil and other components of the outdoor unit must be cleaned every year.

Consult your dealer or service center.

The air filter collects dust and other particles from the air and should be cleaned at regular intervals

as indicated in the table below or when the filter indication ( ) on the display of the remote control

unit (wired type) shows that the filter needs cleaning. If the filter gets blocked, the efficiency of the air

conditioner drops greatly.

Air filter

Type

Period

NOTE

2 weeks

The frequency with which the filter should be cleaned depends on the environment in which the

unit is used.

1. Remove the air filter from the air

intake grille.

2. Use a vacuum cleaner to remove

light dust. If there is sticky dust on

the filter, wash the filter in lukewarm,

soapy water, rinse it in clean water,

and dry it.

Air filter finger-hold

Air intake grill

finger-hold

Screw

Air filter

1. Take hold of the finger-hold

on the air intake grille and

press it to the rear, and the

grille will open downward.

2. Take hold of the finger-hold

on the air filter, pull it toward

you.

Hook

Screw

Latch

Air filter finger-hold

* Take hold of the finger-hold on the air filter, pull it toward you.

1. Certain metal edges and the condenser fins are sharp and may cause injury if handled

improperly; special care should be taken when you clean these parts.

2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt

or soot.

CAUTION

3. The internal coil and other components of the outdoor unit must also be cleaned periodi-

cally. Consult your dealer or service center.

Care: After a prolonged idle period

Check the indoor and outdoor unit air intakes and outlets for blockage; if there is a

blockage, remove it.

•

Operate the fan for half a day to dry out the inside.

Care: Before a prolonged idle period

Disconnect the power supply and also turn off the circuit breaker.

Clean the air filter and replace it in its original position.

Outdoor unit internal components must be checked and cleaned periodically. Con-

tact your local dealer for this service.

I TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work

properly, contact your dealer or a service center.

Possible Cause

Trouble

Remedy

Air conditioner does not run at all

1. Power failure.

1. After a power outage, press ON/OFF operation button

on the wired remote control unit.

2. Leakage circuit breaker has tripped.

3. Line voltage is too low.

2. Contact service center.

3. Consult your electrician or dealer.

4. Press the button again.

4. Operation button is turned off.

heat pump is

5. The wired remote control unit or

5. Consult your dealer.

malfunctioning.

(The inspection mark

and the letters E, F,

combination with numbers appear

H, L, P in

remote control unit.)

on the LCD of the wired

Compressor runs but soon stops

1. Obstruction in front of condenser coil

1. Remove obstruction

Poor cooling (or heating) performance 1. Dirty or clogged air filter.

1. Clean air filter to improve the airflow.

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or cold) out.

4. Remove it to ensure good airflow.

room.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air discharge port.

5. Thermostat is set too high for cooling

5. Set the temperature lower (or higher).

(or too low for heating).

6. (Defrosting system does not work.)

6. (Consult your dealer.)

I Tips for Energy Saving

•

Do not block the air intake and outlet of the unit. If either is obstructed, the unit will not

work well, and may be damaged.

Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls

and ceiling of the room are warmed by the sun, it will take longer to cool the room.

Avoid

•

Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

To prevent conditioned air from escaping, keep windows, doors and any other openings

closed.

Should the power fail while the unit is running

If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is

restored using the same settings before the power was interrupted.

NOTE

9-5. Wall-Mounted Type (K Type)

I NAME OF PARTS

K Type (Wall-Mounted)

Air intake

Air outlet

I CARE AND CLEANING

1. For safety, be sure to turn the air conditioner off and also to disconnect the power before

cleaning.

WARNING

2. Do not pour water on the indoor unit to clean it. This will damage the internal compo-

nents and cause an electric shock hazard.

Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them

(Indoor unit) with a clean, soft cloth.

If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When clean-

ing the air outlet side, be careful not to force the vanes out of place.

1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe plastic

parts using very hot water.

CAUTION

2. Some meta l edges and the fins are sharp and may cause injury if handled improperly; be

especially careful when you clean these parts.

3. The internal coil and other components of the outdoor unit must be cleaned every year.

Consult your dealer or service center.

The air filter collects dust and other particles from the air and should be cleaned at regular intervals

as indicated in the table below or when the filter indication ( ) on the display of the remote control

unit (wired type) shows that the filter needs cleaning. If the filter gets blocked, the efficiency of the air

conditioner drops greatly.

Air filter

NOTE

Type

Period

2 weeks

The frequency with which the filter should be cleaned depends on the environment in which the

unit is used.

1. Remove the air filter from the air intake grille.

2. Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter, wash the filter in

lukewarm, soapy water, rinse it in clean water, and dry it.

1. Move the flap on the air outlet grille to its lowest position with the remote control unit.

2. The filter is disengaged by pushing the tab up gently. Hold the air filter by the tab at the bottom,

and pull downward.

Air intake grille

Air filter

When replacing the filter, make sure that the FRONT mark is facing you.

Push it up until you hear it click back into position.

1. Certain metal edges and the condenser fins are sharp and may cause injury if handled

improperly; special care should be taken when you clean these parts.

2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt

or soot.

CAUTION

3. The internal coil and other components of the outdoor unit must also be cleaned periodi-

cally. Consult your dealer or service center.

Care: After a prolonged idle period

Check the indoor and outdoor unit air intakes and outlets for blockage; if there is a

blockage, remove it.

•

Operate the fan for half a day to dry out the inside.

Care: Before a prolonged idle period

Disconnect the power supply and also turn off the circuit breaker.

Clean the air filter and replace it in its original position.

Outdoor unit internal components must be checked and cleaned periodically. Con-

tact your local dealer for this service.

I TROUBLESHOOTING

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work

properly, contact your dealer or a service center.

Possible Cause

Trouble

Remedy

Air conditioner does not run at all

1. Power failure.

1. After a power outage, press ON/OFF operation button

on the wired remote control unit.

2. Leakage circuit breaker has tripped.

3. Line voltage is too low.

2. Contact service center.

3. Consult your electrician or dealer.

4. Press the button again.

4. Operation button is turned off.

heat pump is

5. The wired remote control unit or

5. Consult your dealer.

malfunctioning.

(The inspection mark

and the letters E, F,

combination with numbers appear

H, L, P in

remote control unit.)

on the LCD of the wired

Compressor runs but soon stops

1. Obstruction in front of condenser coil

1. Remove obstruction

Poor cooling (or heating) performance 1. Dirty or clogged air filter.

1. Clean air filter to improve the airflow.

2. Eliminate heat source if possible.

3. Shut them to keep the heat (or cold) out.

4. Remove it to ensure good airflow.

room.

2. Heat source or many people in

3. Doors and/or windows are open.

4. Obstacle near air intake or air discharge port.

5. Thermostat is set too high for cooling

5. Set the temperature lower (or higher).

(or too low for heating).

6. (Defrosting system does not work.)

6. (Consult your dealer.)

I Tips for Energy Saving

•

Do not block the air intake and outlet of the unit. If either is obstructed, the unit will not

work well, and may be damaged.

Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls

and ceiling of the room are warmed by the sun, it will take longer to cool the room.

Avoid

•

Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter

will impair the performance of the unit.

To prevent conditioned air from escaping, keep windows, doors and any other openings

closed.

Should the power fail while the unit is running

If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is

restored using the same settings before the power was interrupted.

NOTE

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