Toshiba Air Conditioner RAV SP180AT2 UL User Manual

AIR CONDITIONER (SPLIT TYPE)  
Installation manual  
For OUTDOOR USE only  
Outdoor Unit  
Model name:  
RAV-SP180AT2-UL  
Installation manual  
Air conditioner (Split type)  
English  
1
Manuel d'installation  
Climatiseur (Type split)  
Français  
19  
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1 DIMENSION  
23.6"(600)  
3.5"(90)  
A legs  
Space required for service  
Drain hole(Ø1"(25))  
2-Ø0.4"(11)×0.6"(14) U-shape holes  
(For Ø0.3"(8)-0.4"(10) anchor bolt)  
Drain hole  
4.3"(108) 4.9"(125)  
2.1"(54)  
(2-Ø0.7"(20) × 3.5"(88) long hole)  
23.6"(600)  
2-Ø0.4"(11)-0.6"(14)  
Air intake  
U-shape hole  
5.9"(150)  
(For Ø0.3"(8)-0.4"(10)  
anchor bolts)  
or more  
11.8"(300)  
or more  
5.9"(150)  
or more  
(Minimum  
distance up to wall)  
8-Ø0.2"(6) hole  
19.7"(500)  
2-Ø0.4"(11)×0.6"(14) long hole  
(For Ø0.3"(8)-0.4"(10) anchor bol  
or more  
(For fixing outdoor unit)  
Air discharge  
3.1"(79)  
1.2"(30)  
B legs  
2-Ø0.4"(11)×0.6"(14) long hole  
(For Ø0.3"(8)-0.4"(10) anchor bolts)  
19.1"(486)  
4.3"(108)  
10"(255)  
6.2"(157)  
5.7"(145)  
6.1"(155)  
0.9"(22)  
1"(26)  
Refrigerant pipe  
connecting port  
(Ø0.3"(6.4) flare at liquid side)  
Charge port  
13.5"(342)  
Refrigerant pipe  
1.3"(32)  
Discharge guard  
23.6"(600)  
R0.6"(15)  
19.7"(500)  
2.7"(69)  
connecting port  
30.7"(780)  
(Ø0.5"(12.7) flare at gas side)  
Discharge guide mounting hole  
(4-Ø1.8"(4.5) embossing)  
Ø0.4"(11)×0.6"(14)  
U-shape hole  
2.1"(54)  
Product  
1.5"(38)  
0.4"(11)  
external line  
2-Ø0.2"(6) hole  
2-Ø0.2"(6) hole  
R0.6"(15)  
1.5"(38)  
2.1"(54)  
Product  
external line  
Ø0.4"(11)×0.6"(14)  
23.6"(600)  
U-shape hole  
Details of A legs  
Details of B legs  
EN  
2-EN  
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2 ACCESSORY PARTS  
Part name  
Q’ty  
Shape  
Usage  
Installation manual  
1
This manual  
(Hand this directly to the customer.)  
Drain nipple  
1
2
Waterproof rubber cap  
NOTE  
Use drain nipple and waterproof rubber cap as necessary.  
3-EN  
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3 SYSTEM REQUIREMENTS  
Refrigerant charge  
Piping (Field supplied)  
• Minimum refrigerant line length between the outdoor  
unit and indoor unit is 16.5” (5 m)  
Length of refrigerant  
pipe connected to  
indoor/outdoor unit  
Additional refrigerant  
• Maximum pipe lengths  
16’5” - 65’7”  
(5 - 20 m)  
None  
Allowable  
pipe length  
(ft (m))  
Height difference  
(Indoor-outdoor H)  
(ft (m))  
Number of  
Add 0.22 oz/ft (20 g/m) of  
refrigerant for piping that exceeds  
65’7” (20 m) up to 164’1” (50 m).  
bent portions  
*65’7” - 164’1”  
(20 - 50 m)  
Totallength  
L
Indoor unit: Outdoor unit:  
Upper  
Lower  
10 or less  
* Caution during addition of refrigerant  
Max. amount of additional refrigerant is 1.8 lbs (800  
g).  
Charge the refrigerant accurately. Overcharging  
may cause serious trouble with the compressor.  
164’1” (50)  
98’5” (30)  
98’5” (30)  
Figure of Single  
Indoor Unit  
* Minimum refrigerant pipe is 16’5”(5 m).  
This may cause a malfunction of the compressor or  
other devices.  
Metering Device is an electronic EXV (PMV) in  
outdoor unit.  
Outdoor Unit  
Connecting power and control  
cables (Field supplied)  
• The main power is supplied to the outdoor unit. The  
field supplied connecting cables from the outdoor  
unit to the indoor unit consist for 4 wires and provides  
the power for the indoor unit as well as the  
communication signal between the outdoor and  
indoor unit.  
Refrigerant sizes  
Liquid side  
Outer  
Gas side  
Outer  
Thickness  
Thickness  
diameter  
diameter  
• Consult local building codes, NEC (National  
Electrical Code) or CEC (Canadian Electrical Code)  
for special requirements.  
0.03”  
(0.8 mm)  
Ø1/4”  
0.03”  
Ø1/2”  
(12.7 mm)  
(6.4 mm)  
(0.8 mm)  
Flare nuts and flaring  
• The following are the electrical requirements.  
• The flare nuts and flaring are different from those for  
the conventional refrigerant.  
Use the flare nuts supplied with the air conditioner or  
those for R410A.  
Model RAV-  
Power supply  
SP180  
208/230 V~, 60 Hz  
17 A  
MCA  
• Before performing flaring, carefully read  
“REFRIGERANT PIPING”  
MOCP (MAX Fuse/CB)  
Breaker  
30 A  
20 A  
Insulation  
Maximum 65’7” (20 m)  
2 x AWG12  
Both lines need to be insulated. Use a minimum 0.4”  
(10 mm) wall thickness.  
Power wire  
Ground : AWG14  
System  
interconnection wires  
4 x AWG12  
MCA = Minimum Circuit Amps  
MOCP =Maximum Over Protection Device Amps.  
EN  
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4 PRECAUTIONS FOR SAFETY  
Installing, starting up, and servicing air--conditioning equipment can be hazardous due to system pressures,  
electrical components, and equipment location (roofs, elevated structures, etc.).  
Only trained, qualified installers and service mechanics should install, start--up, and service this equipment.  
Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should  
be performed by trained service personnel.  
When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached  
to the equipment.  
Follow all safety codes. Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher nearby  
when brazing. Use care in handling, rigging, and setting bulky equipment.  
Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the  
unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety  
information. This is the safety--alert symbol  
. When you see this symbol on the unit and in instructions or  
manuals, be alert to the potential for personal injury.Understand these signal words: DANGER, WARNING, and  
CAUTION. These words are used with the safety--alert symbol.  
DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING  
signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which  
may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which  
will result in enhanced installation, reliability, or operation.  
WARNING  
Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.  
Perform installation work properly according to the Installation Manual.  
Inappropriate installation may result in water leakage, electric shock or fire.  
Be sure to ground the equipment  
Improper grounding may cause an electric shock.  
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.  
Turn off the circuit breaker before attempting any electrical work and maintenance.  
Make sure the circuit breaker is off. Failure to do so may cause electric shock.  
Use an exclusive power circuit for the air conditioner. Use the rated voltage.  
When moving the air conditioner for installation to another place, be very careful not to allow the specified  
refrigerant (R410A) to become mixed with any other gaseous body into the refrigeration cycle.  
If air or any other gas mixes with the refrigerant, the gas pressure in the refrigeration cycle will become abnormally  
high and it may result in the pipe bursting or personal injuries.  
Do not modify this unit by removing any of the safety guards or by by-passing any of the safety interlock  
switches.  
Do not touch the intake or aluminium fins of the outdoor unit.  
Doing so may result in injury.  
Tighten the flare nut with a torque wrench in the specified manner.  
Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in  
refrigerant leakage.  
Install the air conditioner securely in a location where the base can sustain the weight of the unit adequately.  
If refrigerant gas has leaked during the installation work, ventilate the room immediately.  
If the leaked refrigerant gas comes in contact with fire, noxious gas may be generated.  
After the installation work, confirm that refrigerant gas does not leak.  
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may be  
generated.  
Electrical work must be performed by a qualified electrician in accordance with the NEC and local code. Make  
sure the air conditioner uses an exclusive power supply.  
An insufficient power supply capacity or inappropriate installation may cause fire.  
Use only the specified wiring during the unit installation. Ensure that all terminals are securely fixed, so  
preventing any external forces having a negative effect on the terminals.  
5-EN  
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WARNING  
When the air conditioner cannot cool or heat a room well, contact the dealer from whom you purchased the  
air conditioner as refrigerant leakage is considered as the cause.  
In the case of repair that requires refill of refrigerant, ask service personnel about details of the repair.  
The refrigerant used in the air conditioner is harmless.  
Generally, the refrigerant does not leak. However, if the refrigerant leaks in a room and a heater or stove burner in  
the room catches fire, it may generate toxic gas.  
When you ask service personnel for repairing refrigerant leakage, confirm that the leakage portion has been  
completely repaired.  
Do not install the air conditioner in a location that may be subjected to a risk of exposure to a combustible  
gas.  
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.  
Install the refrigerant pipe securely during the installation work before operating the air conditioner.  
If the compressor is operated with the valve open and without the refrigerant pipe, the compressor sucks air and the  
refrigeration cycle is over pressurized, which may cause a burst or injury.  
When carrying out the pump-down work, shut down the compressor before disconnecting the refrigerant  
pipe.  
Disconnecting the refrigerant pipe with the service valve left open and with the compressor still operating will cause  
air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly  
resulting in rupturing, injury, etc.  
CAUTION  
Do not climb onto or place objects on top of the outdoor unit.  
You may fall or the objects may fall off of the outdoor unit and result in injury.  
Wear heavy gloves during the installation work to avoid injury.  
EQUIPMENT DAMAGE HAZARD  
Failure to follow this caution may result in equipment damage or improper operation.  
Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must be  
a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length is  
buried, refrigerant may migrate to the cooler buried section during extended periods of system shutdown. This causes  
refrigerant slugging and could possibly damage the compressor at start-up.  
EN  
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5 INSTALLATION OF NEW REFRIGERANT  
AIR CONDITIONER  
CAUTION  
New Refrigerant Air Conditioner Installation  
THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY  
OZONE LAYER.  
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working  
pressure of R410A refrigerant is approx. 1.6 times as that of refrigerant R22. Accompanied with the adoption of the new  
refrigerant, the refrigerant oil has also been changed. Therefore, during installation work, be sure that water, dust,  
former refrigerant, or refrigerant oil does not enter the new type refrigerant R410A air conditioner cycle.  
To prevent mixing of refrigerant or refrigerant oil, the sizes of connecting sections of charging port on main unit and  
installation tools are different from those of the conventional refrigerant units. Accordingly, special tools are required for  
the new refrigerant (R410A) units. For connecting pipes, use new and clean piping materials with high pressure fittings  
made for R410A only, so that water and/or dust does not enter.  
Required Tools/Equipment and Precautions for Use  
Prepare the tools and equipment listed in the following table before starting the installation work.  
: R410A exclusive  
: Generic  
Tools/equipment  
Manifold gauge*  
Use  
Vacuuming/charging refrigerant  
and operation check  
Charging hose  
Gas leak detector  
Gas leak check  
Vacuum drying  
Vacuum pump with backflow  
prevention function  
Flare tool  
Flare machining of pipes  
Bending pipes  
Usable if dimensions are adjusted.  
Ø1/4” (6.4 mm) and Ø1/2” (12.7 mm)  
Bender  
Refrigerant recovery equipment  
Torque wrench  
Pipe cutter  
Refrigerant recovery  
Tightening flare nuts  
Cutting pipes  
Brazing torch and nitrogen  
cylinder  
Braze pipes  
Refrigerant charging scales  
4 mm hexagon wrench  
Charging refrigerant  
Opening liquid valve  
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When an outdoor unit is installed in a location that is  
always exposed to strong winds like a coast or on  
the high stories of a building, one of the following is  
recommended.  
• Install the unit so that its discharge faces the wall of  
the structure.  
Installation Location  
WARNING  
Install the outdoor unit in a location that can support  
the weight of the outdoor unit.  
Insufficient durability may cause the outdoor unit to fall,  
which may result in injury.  
Keep a distance 19.7” (500 mm) or more between the  
unit and wall.  
19.7" (500 mm)  
CAUTION  
Do not install the outdoor unit in a location that is  
subject to combustible gas leaks.  
Accumulation of combustible gas around the outdoor  
unit may cause a fire.  
Install the outdoor unit in a location that meets the  
following conditions.  
• A well-ventilated location free from obstacles near the  
air inlets and air outlet  
• A location that does not increase the operating noise  
or vibration of the outdoor unit  
• Install the unit so that the discharge is at a right angle  
relative to the wind direction.  
• A location that does not produce any drainage  
problems from discharged water  
• Location with easy access to power.  
Strong wind  
Strong wind  
Do not install the outdoor unit in the following  
location.  
• A location with a saline atmosphere (coastal area) or  
one that is full of sulfide gas (hot-spring area) (Special  
maintenance is required.)  
• A location subject to oil, vapor, oily smoke, or  
corrosive gases  
• Use wind baffle. Produce those parts in the field.  
• When outside temperature conditions are 23 °F (-5  
°C) or lower and unit is running in cooling mode.  
• A location in which organic solvent is used  
• A location where high-frequency equipment (including  
inverter equipment, private power generator, medical  
equipment, and communication equipment) is used  
(Installation in such a location may cause malfunction  
of the air conditioner, abnormal control or problems  
due to noise from such equipment.)  
<Example>  
Wind baffle  
Wind baffle  
• A location in which the discharged air of the outdoor  
unit blows against the window of a neighboring house  
• A location where the operating noise of the outdoor  
unit is transmitted  
• When the outdoor unit is installed in an elevated  
position, be sure to secure its feet.  
• A location in which drain water poses any problems.  
EN  
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Unit : in (mm)  
Outdoor Unit  
Required Clearances  
Barrier at rear side  
Barrier in front  
Upper side is free  
1. Single unit installation  
Above unit is free  
1. Single unit installation  
2. Barrier on right, left and rear.  
2. Multiple units installation  
The height of the  
barrier should be  
lower than the height  
of the outdoor unit.  
5.9” (150)  
or more  
11.8” (300) or more  
3. Multiple units installation  
Barrier also above unit  
39.4” (1000)  
or more  
5.9”  
(150)  
or more  
11.8”  
11.8”  
11.8”  
(300)  
(300)  
(300)  
or more  
or more  
or more  
The height of the obstacle should be lower than the  
height of the outdoor unit.  
Barrier also above unit  
5.9” (150)  
or more  
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Barriers in front and back of unit  
Installation of Outdoor Unit  
• Before installation, check the strength and horizontal  
of the base so that abnormal sounds do not  
emanate.  
• According to the following base diagram, fix the base  
firmly with the anchor bolts.  
(Anchor bolt, nut: 3/8” (M10) x 4 pairs)  
Open above and to the right and left of the unit.  
The height of an barrier in both the front and rear of the  
unit, should be lower than the height of the outdoor  
unit.  
Standard installation  
1. Single unit installation  
3.5” (90)  
3.5” (90)  
23.6” (600)  
4.3” (108)  
Ø
1.0” (25)  
Drain hole  
1) Field fabricate a snow or an ice stand for the  
unit using the above dimension.  
2. Multiple unit installation  
a. Intake and supply parallel  
2) Place snow or ice stand on a foundation/pad  
and secure it to the foundation/pad and secure  
it to the foundation/pad by anchor bolts.  
NOTE  
When the outdoor unit is anchored directly on  
the foundation/pad (cooling only protrude a  
minimum of 0.6” (15 mm)).  
11.8” (300)  
or more  
11.8” (300) or more  
0.6” (15 mm) or less  
b. Intake and supply in line  
Open above and to the right and left of the unit.  
The height of an obstacle in both the front and  
rear of the unit should be lower than the height  
of the outdoor unit.  
Standard installation  
7.9”  
(200)  
or more  
59.1”  
(1500)  
or more  
78.7”  
(2000)  
or more  
39.4”  
(1000)  
or more  
11.8”  
(300) or  
more  
EN  
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3) Place unit on stand. Make sure it is level and  
fasten securely to the stand.  
As shown in the figure below, install the  
foundation and vibration-proof rubber pads to  
directly support the bottom surface of the fixing  
leg that is in contact with the bottom plate of the  
outdoor unit.  
Waterproof rubber cap  
(2pcs.)  
Drain nipple  
When installing the foundation for an outdoor  
unit with downward piping, consider the piping  
work.  
Waterproof rubber  
cap  
GOOD  
Mounting leg  
Base plate  
Drain nipple  
Foundation  
GOOD  
For Reference  
Bottom plate  
of outdoor unit  
If a heating operation is to be continuously performed  
for a long time under the condition that the outdoor  
temperature is 32 °F (0 °C) or lower, draining defrosted  
water may be difficult due to the bottom plate freezing,  
resulting in trouble with the cabinet or fan.  
Foundation  
Support the bottom surface of the  
mounting leg that is in contact with  
and underneath the bottom plate of  
the outdoor unit.  
Do not support  
NO GOOD  
the outdoor unit  
only with the  
If only the end of the  
mounting leg is  
supported, it may  
deform.  
mounting leg.  
Foundation  
• When water is to be drained through the drain hose,  
attach the following drain nipple and waterproof  
rubber cap, and use the drain hose (Inner diameter:  
0.6” (16 mm)) sold on the market. Also seal the  
screws securely with silicone material, etc., to  
prevent water from leaking.  
Some conditions may cause condensation or  
dripping of water.  
• When collectively draining discharged water  
completely, use a drain pan.  
11-EN  
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6 REFRIGERANT PIPING  
Tightening of Flare  
Connections  
1. Align the centers of the flare connections and fully  
tighten the flare nuts with your fingers.  
CAUTION  
TAKE NOTE OF THESE 4 IMPORTANT  
POINTS BELOW FOR PIPING WORK  
1. Keep dust and moisture away from inside the  
connecting pipes.  
Valve at liquid side  
2. Tightly connect the connection between pipes  
and the unit.  
3. Evacuate the air in the connecting pipes using a  
VACUUM PUMP.  
4. Check for gas leaks at connected points.  
Flaring  
1. Cut the pipe with a pipe cutter.  
Be sure to remove burrs that may cause a gas leak.  
2. Insert the supplied flare nut into the pipe, and then  
flare the pipe.  
As the flaring sizes of R410A differ from those of  
refrigerant R22, the flare tools newly manufactured  
for R410A are recommended.  
2. Use two wrenches to loosen or tighten the flare nut  
on the gas service valve as shown in the figure.  
Use only one wrench to loosen or tighten the flare  
not on the liquid service valve.  
However, the conventional tools  
B
can be used by adjusting the  
projection margin of the copper  
pipe.  
The final tightening with a torque wrench should be  
to the specifications shown in table below.  
Unit : ft•lbs (N•m)  
Projection margin in flaring : B (Unit : in (mm))  
Rigid (Clutch type)  
Outer diameter of copper pipe  
1/4” (6.4 mm)  
Tightening torque  
10 - 13 (14 - 18)  
37 - 46 (50 - 62)  
R410A tool  
used  
Conventional  
tool used  
1/2” (12.7 mm)  
Outer diameter of  
copper pipe  
R410A  
Valve at gas side  
0.04” - 0.06”  
(1.0 - 1.5)  
1/4” (6.4)  
0 - 0.02” (0 - 0.5)  
1/2” (12.7)  
Flaring diameter size : A (Unit : in (mm))  
+0  
Outer diameter of copper pipe  
1/4” (6.4)  
A
-0.02" (–0.4)  
0.39” (9.9)  
1/2” (12.7)  
0.65” (16.6)  
* In case of flaring for R410A with the  
conventional flare tool, pull the tool out  
approx. 0.02” (0.5 mm) more than that for  
R22 to adjust it to the specified flare size.  
The copper pipe gauge is useful for  
adjusting the projection margin size.  
A
EN  
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• After the installation work, be sure to check for gas  
leaks of the pipe connections with nitrogen.  
NO GOOD  
CAUTION  
1. Do not put the crescent wrench on the charge  
orifice or cover.  
The valve may be broken.  
2. If applying excessive torque, the nut may break  
according to some installation conditions.  
• Pressure of R410A is higher than that of R22  
(Approx. 1.6 times).  
Therefore, using a torque wrench, tighten the flare  
pipe connecting sections that connect the indoor/  
outdoor units at the specified tightening torque.  
Incomplete connections may cause not only a gas  
leak, but also trouble with the refrigeration cycle.  
Do not apply refrigerant oil to the flared  
surface.  
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7 ELECTRICAL CONNECTIONS  
Field wiring  
WARNING  
The dashed lines show field wiring.  
ELECTRICAL SHOCK HAZARD  
(Indoor/outdoor  
connecting wires)  
Failure to follow this warning could result in  
personal injury or death.  
(Main circuit)  
L
1
2
L
1
L
L
1
2
Input  
power  
• The unit cabinet must have an uninterrupted or  
unbroken ground to minimize personal injury if an  
electrical fault should occur. The ground may consist  
of electrical wire or metal conduit when installed in  
accordance with existing electrical codes.  
• Before performing service or maintenance, be sure  
main power switch is turned OFF.  
L2  
L
208/230 V~,  
60 Hz  
Remote  
controller  
S
S
circuit breaker  
Outdoor unit  
Indoor unit  
ground  
• Connect the indoor/outdoor connecting wires to the  
identical terminal numbers on the terminal block of  
each unit.  
CAUTION  
UNIT DAMAGE HAZARD  
Incorrect connection may cause a failure.  
Failure to follow this caution may result in damage  
or improper operation.  
• Unit failure as a result of operation on improper line  
voltage or excessive phase imbalance constitutes  
abuse and may cause damage to electrical  
components.  
• Wrong wiring may cause a burn-out of some electrical  
parts.  
• Do not damage or scratch the conductive core or inner  
insulator of the power and inter-connecting wires  
when peeling them.  
1. With the valve cover removed the electrical control  
box is exposed the side of the unit.  
2. Terminate the field wiring conduit (if used) at the  
conduit connection holes provided.  
3. Route the field power wires and the system  
interconnection wires (indoor to outdoor). Terminate  
the wires at field wiring terminal blocks.  
Field wiring terminal blocks  
L1 L2 S L1 L2  
Valve cover  
L1  
2  
L
Ground screw  
System interconnection  
wires  
Field power  
supply wires  
Wiring  
All wiring and connections must comply with NEC,  
CEC, local codes.  
1. Connect all wires to the correct terminal on the  
wiring terminal blocks.  
Field power  
supply wires  
2. Make sure that all connectors are secure.  
3. Size connectors per the ratings listed in the system  
requirement section.  
System  
interconnection wires  
Conduit  
4. System interconnections should be minimum, 16  
AWG.  
EN  
– 14 –  
14-EN  
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Installation Manual  
Outdoor Unit  
8 EVACUATE AND DEHYDRATE THE  
SYSTEM  
5. Evacuate using either deep vacuum or triple  
evacuation method.  
CAUTION  
6. After evacuation is complete, fully close the low side  
of manifold gage and stop operation of vacuum  
pump.  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in equipment  
damage or improper operation.  
Never use the system compressor as a vacuum pump.  
Deep Vacuum Method  
Refrigerant tubes and indoor heat exchanger should  
be evacuated using the recommended deep vacuum  
method of 500 microns. The alternate triple evacuation  
method may be used if the procedure outlined below is  
followed. Always break a vacuum with dry nitrogen.  
The deep vacuum method requires a vacuum pump  
capable of pulling a vacuum of 500 microns and a  
vacuum gage capable of accurately measuring this  
vacuum depth. The deep vacuum method is the most  
positive way of assuring a system is free of air and  
liquid water.  
Deep Vacuum Graph  
SYSTEM VACUUM AND  
5000  
4500  
4000  
CHARGE  
LEAK IN  
3500  
Using Vacuum Pump  
SYSTEM  
3000  
2500  
2000  
1. Completely tighten flare nuts A, B, C, D, connect  
manifold gage charge hose to a charge port of the  
low side service valve.  
VACUUM TIGHT  
1500  
TOO WET  
Service Valve  
1000  
TIGHT DRY  
Refrigerant  
Low Side  
Indoor Unit  
500  
Outdoor Unit  
SYSTEM  
C
D
A
B
0
1
2
3
4
5
6
7
High Side  
MINUTES  
Service Valve  
Triple Evacuation Method  
2. Connect charge hose to vacuum pump.  
3. Fully open the low side of manifold gage.  
The triple evacuation method should only be used  
when vacuum pump is only capable of pumping down  
to 28 in. of mercury vacuum and system does not  
contain any liquid water.  
Manifold Gage  
Manifold  
500 microns  
Refer to “Triple Evacuation Method chart” and proceed  
as follows:  
1. Pump system down to 28 in. of mercury and allow  
pump to continue operating for an additional 15  
minutes.  
Low side valve  
Charge hose  
High side valve  
Charge hose  
2. Close service valves and shut off vacuum pump.  
3. Connect a nitrogen cylinder and regulator to system  
and open until system pressure is 2 psig.  
4. Close service valve and allow system to stand for 1  
hr. During this time, dry nitrogen will be able to  
diffuse throughout the system absorbing moisture.  
5. Repeat this procedure as indicated in the chart.  
System will then be free of any cotaminants and  
water vapor.  
Vacuum pump  
Packed valve at gas side  
Charge port  
(Valve core (Setting pin))  
4. Start vacuum pump.  
15-EN  
– 15 –  
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Installation Manual  
Outdoor Unit  
Triple Evacuation Method chart  
Open service valves  
EVACUATE  
Open or close the valve.  
Liquid and gas side  
BREAK VACUUM WITH DRY NITROGEN  
Open the valve with a 4 mm hexagon wrench.  
[Hexagonal wrench is required.]  
WAIT  
EVACUATE  
BREAK VACUUM WITH DRY NITROGEN  
WAIT  
• While the valve is fully opened, after the screwdriver  
has reached the stopper, do not apply torque  
exceeding 4 ft•lbs (5 N•m). Applying excessive  
torque may damage the valve.  
EVACUATE  
CHECK FOR TIGHT, DRY SYSTEM  
(IF IT HOLDS DEEP VACCUM)  
Valve handling precautions  
• Open the valve stem until it reaches the stop.  
It is unnecessary to apply further force.  
RELEASE CHARGE INTO SYSTEM  
• Securely tighten the cap with a torque wrench.  
• Cap tightening torque  
Final Tubing Check  
Ø1/4” (6.4 mm)  
10 - 13 ft•lbs (14 - 18 N•m)  
Valve size  
IMPORTANT:  
Ø1/2” (12.7 mm) 24 - 31 ft•lbs (33 - 42 N•m)  
10 - 13 ft•lbs (14 - 18 N•m)  
Check to be certain factory tubing on both indoor and  
outdoor unit has not shifted during shipment. Ensure  
tubes are not rubbing against each other or any sheet  
metal. Pay close attention to feeder rubes, making sure  
wire ties on feeder tubes are secure and tight.  
Charge port  
EN  
– 16 –  
16-EN  
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Installation Manual  
Outdoor Unit  
9 FINISHING  
After the refrigerant pipe, inter-unit wires, and drain pipe have been connected, make sure they are supported and  
fixed in place for the entire length.  
Keep the power wires and system interconnection wires away from all factory wiring and piping.  
10TEST RUN  
Turn on the circuit breaker at least 12 hours before starting the system to preheat the compressor and  
prevent damage.  
To protect the compressor, power is supplied from the 208/230 VAC input to the unit to preheat the compressor.  
Check the following before starting a test run:  
That all pipes are connected securely without leaks.  
That the valve is open.  
If the compressor is operated with the valve closed, the outdoor unit will become over pressurized, which may  
damage the compressor or other components.  
If there is a leak at a connection, air can be sucked in and the internal pressure further increases, which may  
cause a burst or injury.  
• Operate the air conditioner using the correct procedure as specified in the Owner’s Manual.  
11PERIODIC MAINTENANCE  
• For an air conditioning system that is operated on a regular basis, cleaning and maintenance of the indoor/  
outdoor units are strongly recommended.  
As a general rule, if an indoor unit is operated for about 8 hours daily, the indoor/outdoor units will need to be  
cleaned at least once every 3 months. This cleaning and maintenance should be carried out by a qualified  
service person.  
Failure to clean the indoor/outdoor units regularly will result in poor performance, icing, water leaking and even  
compressor failure.  
17-EN  
– 17 –  
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Installation Manual  
Outdoor Unit  
SW801  
12UNIT PUMP DOWN  
... Power save setting  
• Use the refrigerant recovery switch on the terminal  
block of the outdoor units to pump down the unit.  
* All switches are OFF as factory default.  
Procedure  
CAUTION  
1. Start cooling operation for a while, and then stop the  
operation.  
2. Turn on the power of the air conditioner.  
3. Select the FAN mode for indoor unit operation with  
the remote controller.  
Do not touch SW801 dip switch 1, 3.  
If any changes are made, the unit may not work properly.  
4. Press reftigerant recovery switch for 2 seconds or  
more. The air conditioner enters the forced cooling  
mode for up to 10 minutes.  
Pump down the unit during this 10 minutes.  
5. Upon completion of pump down the unit, close the  
valve and press refrigerant recovery switch for at  
least 2 second to stop operation.  
6. Turn off the power.  
Refrigerant recovery switch  
SW801  
DANGER  
Be careful of electric shock because the P.C. board has  
an electrical current running through it.  
13POWER SAVE  
• Power save can be set by setting SW801 dip switch.  
Procedure  
1. Turn on the SW801 dip switch 2 to activate Power  
save.  
Power save controls reducing compressor periodicity  
(by approx. 10%) depending on the indoor unit heat  
exchanger temperature in heating operation  
EN  
– 18 –  
18-EN  
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EH99865301  
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