Sanyo Pnr Xs2432 User Manual

INSTALLATION INSTRUCTIONS  
— Split System Air Conditioner —  
CONTENTS  
Model Combinations  
IMPORTANT  
Page  
Combine indoor and outdoor units only as listed below.  
Please Read Before Starting  
Indoor units  
XS1852 (PNR-XS2432)  
Outdoor units  
C1852, CL1852  
1. GENERAL.............................................................3  
1-1. Tools Required for Installation (not supplied)  
1-2. Accessories Supplied with Unit  
1-3. Optional Copper Tubing Kit  
Power Supply :  
60Hz, single-phase, 208/230 V  
1-4. Type of Copper Tube and Insulation Material  
1-5. Additional Materials Required for Installation  
1-6. Operating Range  
Units should be installed by licensed contractor  
according to local code requirements  
1-7. Tubing Length  
2. SELECTING THE INSTALLATION SITE ............ 5  
Indoor Unit  
7. HOW TO PROCESS TUBING ........................... 21  
7-1. Use of the Flaring Method  
Outdoor Unit  
2-1. Baffle Plates for the Outdoor Unit  
7-2. Flaring Procedure with a Flare Tool  
7-3. Precaution before Connecting Tubes Tightly  
7-4. Precautions during Brazing  
7-5. Connecting Tubing between Indoor and  
Outdoor Units  
7-6. Insulating the Refrigerant Tubing  
7-7. Taping the Tubes  
7-8. Finishing the Installation  
3. HOW TO INSTALL THE INDOOR UNIT.............. 7  
3-1. Suspending the Indoor Unit  
3-2. Preparation for Suspending  
3-3. Placing the Unit Inside the Ceiling  
3-4. Installing the Drain Piping  
3-5. Checking the Drainage  
8. AIR PURGING ....................................................24  
Ceiling Panel......................................................11  
3-6. Before Installing the Ceiling Panel  
3-7. Installing the Ceiling Panel  
3-8. When Removing the Ceiling Panel for  
Servicing  
Air Purging with a Vacuum Pump  
(for Test Run)  
9. TEST RUN ..........................................................26  
9-1. Performing Test Run  
3-9. Duct for Fresh Air  
9-2. Performing Test Run with Optional Wired  
Remote Control Unit  
9-3. Basic Function of the Service Valves  
9-4. Pump Down  
4. HOW TO INSTALL THE REMOTE  
CONTROL UNIT .................................................15  
Wireless Remote Control Unit  
4-1. Mounting on a Wall  
Wired Remote Control Unit (Option)  
4-2. Installing the Wired Remote Control Unit  
5. ADDRESS SWITCHES .......................................17  
5-1. Finding the Address Switches  
5-2. Switch Positions for 2 Units or 2 Groups of  
Units  
6. ELECTRICAL WIRING .......................................18  
6-1. General Precautions on Wiring  
6-2. Recommended Wire Length and Wire  
Diameter for Power Supply System  
6-3. Wiring Instructions for the Outdoor Unit  
6-4. Examples of Incorrect Wiring  
6-5. How to Connect Wiring to the Terminal  
SANYO FISHER COMPANY  
A DIVISION OF SANYO NORTH  
AMERICA CORPORATION  
21605 Plummer Street  
Chatsworth, CA91311  
85464359128000  
SANYO 2000  
1
S4359128  
1. General  
Part Name  
Wireless  
remote control unit  
Figure  
Q’ty  
This booklet briefly outlines where and how to install  
the air conditioning system. Please read over the  
entire set of instructions for the indoor and outdoor  
units and make sure all accessory parts listed are with  
the system before beginning.  
1
AAA alkaline  
battery  
2
Special  
screw  
4 16 mm  
1
1
Tapping screw  
Tapping screw  
1-1. Tools Required for Installation (not supplied)  
1. Standard screwdriver  
2. Phillips head screwdriver  
3. Knife or wire stripper  
4. Tape measure  
TOTA 4 16  
1-3. Optional Copper Tubing Kit  
Copper tubing for connecting the outdoor unit to the  
indoor unit is available in kits which contain the narrow  
and wide tubing, fittings and insulation. Consult your  
nearest sales outlet or A/C workshop.  
5. Level  
6. Sabre saw or key hole saw  
7. Hacksaw  
8. Core bits  
9. Hammer  
1-4. Type of Copper Tube and Insulation Material  
10. Drill  
11. Tube cutter  
If you wish to purchase these materials separately  
from a local source, you will need:  
12. Tube flaring tool  
13. Torque wrench  
14. Adjustable wrench  
15. Reamer (for deburring)  
16. Service valve wrench  
17. Wire cutter  
1. Deoxidized annealed copper tube for refrigerant  
tubing.  
Cut each tube 12 in. to 16 in. longer than the  
appropriate lengths to dampen vibration between  
units.  
2. Foamed polyethylene insulation for 5/8"  
(15.88 mm) O.D. copper tubes as required to  
precise length of tubing. Wall thickness of the  
insulation should be not less than 0.3 inch  
(8 mm).  
1-2. Accessories Supplied with Unit  
Table 1-1  
Part Name  
Full-scale  
installation  
diagram  
Figure  
Q’ty  
Remarks  
For determining  
suspension bolt  
pitch  
1
Check local electrical codes  
CAUTION  
and regulations before  
Flare  
insulator  
obtaining wire. Also, check  
any specified instructions or  
limitations.  
1
1
1
For wide tubes  
Installation  
gauge  
For adjusting the  
unit position  
Insulating  
tape  
For wide tube  
flare nuts  
1-5. Additional Materials Required for Installation  
(White for insulating)  
1. Insulated staples or clamps for connecting wire  
(See your local codes.)  
For securing drain  
hose  
2
1
1
1
1
Hose band  
Packing  
2. Putty  
For drain joint  
For drain joint  
3. Refrigeration tubing lubricant  
4. Clamps or saddles to secure refrigerant tubing  
5. Scale for weighing  
Drain  
insulator  
Drain hose  
1-6. Operating Range  
Drain hose  
adapter  
For drain outlet  
Temperature Indoor Air Intake Outdoor Air Intake  
Maximum  
Minimum  
95°F DB, 71°F WB  
115°F DB  
Owner’s  
manual  
Cooling  
1
1
67°F DB, 57°F WB  
67°F DB (0°F DB)*  
*CL&&&& Models  
To open and shut  
the Narrow Tube  
Service Valve  
Hexagonal  
Wrench*  
*Packed in the outdoor unit  
3
S4359128  
1-7. Tubing Length  
Refrigerant tubing between the indoor and outdoor  
Tubing length (L)  
INDOOR  
UNIT  
units should be kept as short as possible.  
Select and decide the installation location so that  
the length of the refrigerant tubing will be within the  
limits given in Table 1-2.  
Elevation difference (H)  
OUTDOOR  
UNIT  
0711_M_I  
Fig. 1-1  
Table 1-2  
Models  
C1852  
Tubing Data  
CL1852  
Narrow tube in. (mm)  
1/4 (6.35): Thickness 0.0314" (0.8 mm)  
5/8 (15.88): Thickness 0.0394" (1.0 mm)  
65  
Tubing size  
outer dia.  
Wide tube  
in. (mm)  
(ft.)  
Limit of tubing length  
Outdoor unit is higher  
Limit of elevation  
23  
23  
than indoor unit  
(ft.)  
difference between  
Outdoor unit is lower  
(ft.)  
the 2 units  
than indoor unit  
Max. allowable tubing length at shipment (ft.)  
Required additional refrigerant *1  
(oz./ft.)  
33  
0.27  
No additional charge of compressor oil is necessary.  
1
*
If total tubing length becomes 33 to 65 ft., charge additional refrigerant (R22) by 0.27 oz./ft..  
4
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2. Selecting the Installation Site  
Indoor Unit  
AVOID:  
areas where leakage of flammable gas may be  
expected.  
places where large amount of oil mist exist.  
direct sunlight.  
locations near heat sources which may affect  
performance of the unit.  
locations where external air may enter the room  
directly. This may cause “sweating” on the air  
discharge ports, causing them to spray or drip.  
locations where the remote control unit will be  
splashed with water or affected by dampness or  
humidity.  
installing the remote control unit behind curtains or  
furniture.  
locations where the receiver in the indoor unit is  
exposed to the inverter lamp light. Faulty operation  
of the unit occurs.  
DO:  
3 ft.  
3 ft.  
select an appropriate position from which every  
corner of the room can be uniformly cooled.  
select a location where the ceiling is strong enough  
3 ft.  
to support the weight of the unit.  
3 ft.  
3 ft.  
select a location where tubing and drain pipe have  
the shortest run to the outdoor unit.  
1330_X_S  
allow room for operation and maintenance as well  
Fig. 2-1  
as unrestricted air flow around the unit. (Fig. 2-1)  
install the unit within the maximum elevation  
difference above or below the outdoor unit and  
within a total tubing length from the outdoor unit as  
detailed in Table 1-2.  
allow room for mounting the remote control unit  
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.  
NOTE  
Air delivery will be degraded if the distance from the  
floor to the ceiling is greater than 10 ft..  
5
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Outdoor Unit  
AVOID:  
Exhaust fan  
NO  
Hot air  
Heat source  
heat sources, exhaust fans, etc. (Fig. 2-2)  
Out-  
door  
unit  
damp, humid or uneven locations.  
DO:  
1817_C_I  
choose a place as cool as possible.  
Fig. 2-2  
choose a place that is well ventilated.  
Obstacle above  
allow enough room around the unit for air intake/  
Min.  
exhaust and possible maintenance. (Fig. 2-3)  
Min.  
7 ft.  
(2 m)  
7 ft.  
Air intake  
Min. 6" (15 cm)  
(2 m)  
Valve side  
Min. 10"  
(25 cm)  
Install the outdoor unit above  
snowfall line.  
CAUTION  
Do not place objects on or sit  
ontheoutdoorunit.Also,never  
block the air intake/outlet or  
exhaust. Distortion of the  
outdoor unit or incomplete  
combustion may result.  
Min. 6"  
(15 cm)  
Air discharge  
Min. 12"  
(30 cm)  
1818_M_I  
Ground  
Min. 6 in.  
(15 cm)  
Donotintroduceforeignmatter  
into the air intake/outlet or  
exhaust.Donotpokethemwith  
such objects as a stick.  
Air intake  
1819_M_I  
Fig. 2-3  
Anchor bolts  
(4 pcs)  
provide a solid base (level concrete pad, concrete  
block, 4 in. × 16 in. (10 × 40 cm) beams or equal), a  
minimum of 4 in. (10 cm) above ground level to  
reduce humidity and protect the unit against possible  
water damage and decreased service life (Fig. 2-4).  
Min. 4"  
(10 cm)  
Air intake  
Concrete  
or equal  
use lug bolts or equal to bolt down unit, reducing  
vibration and noise.  
2-1. Baffle Plates for the Outdoor Unit  
1820_M_I  
(CL×× models only)  
Fig. 2-4  
6" min  
NOTE  
Baffle  
plate  
Baffle  
plate  
It is recommended to use baffle plates for model  
CL1852. The baffle plates are not normally required for  
the other models.  
When the outdoor unit is installed in a position exposed  
to strong wind (like seasonal winds with low air  
temperature in winter), baffle plates must be installed on  
the outdoor unit. (Fig. 2-5)  
Air discharge  
This unit is designed so that the fan of the outdoor unit  
runs at low speed when the air conditioner is operated at  
low outdoor air temperatures. When the outdoor unit is  
exposed to strong wind, the system pressure drops  
because of the freeze protector.  
1821_M_I  
Fig. 2-5  
6
S4359128  
3. How to Install the Indoor Unit  
3-1. Suspending the Indoor Unit  
This unit uses a drain pump. Use a carpenter’s level to  
check that the unit is level.  
3-2. Preparation for Suspending  
Hole-in-anchor  
Hole-in-plug  
Concrete  
Insert  
(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.  
0038_T_I  
Fig. 3-1  
A (ceiling opening dimension)  
B (suspension bolt pitch)  
Table 3-1  
Unit : inch (mm)  
Length  
A
B
Type  
1/2"  
1/2"  
XS1852 (PNR-XS2432) 32-9/32 (820) 28-3/4 (730)  
Refrigerant  
tubing side  
Drain hose  
side  
(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  
suspension fitting, the unit, and the panel.  
Unit: inch  
0962_S_I  
Fig. 3-2  
Refrigerant tubing joint (narrow tube side)  
Refrigerant tubing joint (wide tube side)  
Drain inspection port  
Suspension lug  
15/32"  
15/32"  
Power supply inlet  
1019_X_I  
Fig. 3-3  
Table 3-2  
Unit : inch  
Length  
A
B
C
D
E
Type  
XS1852 (PNR-XS2432) 5-29/32 7-7/8 10-1/32 11-23/32 4-29/32  
7
S4359128  
3-3. Placing the Unit Inside the Ceiling  
(1) When placing the unit inside the ceiling, deter-  
mine the pitch of the suspension bolts using the  
supplied full-scale installation diagram. (Fig. 3-4)  
The size of the opening for the indoor unit can be  
confirmed by attaching the full-scale installation  
diagram beneath the unit. (Fig. 3-4)  
Full-scale installation diagram  
(printed on a cardboard packing)  
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 posi-  
tion for connection to the unit before placing the  
unit inside the ceiling.  
Full-scale installation  
diagram  
0963_X_I  
Fig. 3-4  
(2) The length of suspension bolt must be appropri-  
ate for a distance between the bottom of the bolt  
and the bottom of the ceiling of more than  
2-3/8 in. as shown in Fig. 3-4.  
Suspension bolt  
Suspension lug  
Nuts and washers  
(2 sets)  
(3) Thread the 2 hexagonal nuts and washers (field  
supply) onto the 4 suspension bolts as shown in  
Fig. 3-5.  
Upper  
Lower  
Use 2 sets of nuts and washers (upper and  
lower), so that the unit will not fall off the suspen-  
sion lugs.  
(4) Remove the protective cardboard used to protect  
the fan parts during transport.  
0041_X_I  
Fig. 3-5  
(5) Adjust the distance between the unit and surface  
of the ceiling (1-7/8 in.) using the supplied instal-  
lation gauge. (Fig. 3-4)  
8
S4359128  
3-4. Installing the Drain Piping  
Transparent part for  
checking drainage  
Hard PVC pipe  
(not supplied)  
Hose band  
(supplied)  
(1) Prepare standard hard PVC pipe (O.D. 1-3/64 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 transparent part allows you to check drain-  
age. (Fig. 3-6)  
Drain hose  
Packing  
(supplied)  
Drain hose  
(supplied)  
adapter  
(supplied)  
0964_X_I  
Tighten the hose clamps  
Fig. 3-6  
CAUTION  
so their locking nuts face  
upward. (Fig. 3-6)  
Drain insulator (supplied)  
(2) After checking the drainage, wrap the supplied  
packing and drain pipe insulator around the pipe.  
(Fig. 3-7)  
NOTE  
Ensure the drain pipe has a downward gradient  
(1/100 or more) and that there are no water traps.  
0197_X_I  
Fig. 3-7  
Do not install an air  
Air bleeder  
CAUTION  
bleeder tubes, as this  
may cause water to spray  
from the drain tube outlet.  
(Fig. 3-8)  
0047_X_I  
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 10 in. Do not raise it any  
higher than 10 in., as this could result  
in water leaks.  
Fig. 3-8  
5 in. or less (as short as possible)  
10 in. or less  
(Fig. 3-9)  
Do not install the pipe with an upward  
gradient from the connection port. It  
will cause the drain water to flow  
backwards and leak when the unit is  
stopped. (Fig. 3-10)  
0965_X_I  
Fig. 3-9  
Upward gradient  
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 connec-  
tion to the unit. Fasten the pipe to a  
wall, frame, or other support as close  
to the unit as possible. (Fig. 3-11)  
0049_X_I  
Fig. 3-10  
Provide insulation for any drain pipes  
that are installed indoors.  
Support  
pieces  
0050_X_I  
Fig. 3-11  
9
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3-5. Checking the Drainage  
After wiring and piping are completed, use the follow-  
ing procedure to check that the water will drain  
smoothly. For this, prepare a bucket and wiping cloth  
ready to catch and wipe up spilled water.  
Do not supply power to the  
unit until the tubing and  
wiring to the outdoor unit  
are completed.  
(1) Take off the tube cover and through the opening,  
slowly pour about 43 oz. of water into the drain  
pan to check drainage.  
(2) Do Test Run to check the drainage after complet-  
ing installation. When performing Test Run, be  
sure to observe the Test Run procedure.  
Refer to page 37.  
Be careful since the fan will  
CAUTION  
start turning when checking  
the drainage.  
5/16"(4 × 8 mm)  
tapping screw  
(3) After drain checking is finished, return the  
Operation Selector switch to the RUN position  
(ON position ) and remount the tube cover.  
To mount the tube cover,  
CAUTION  
use 5/16" (4 × 8 mm) tapping  
Tube cover  
screws. Do not use long  
screws as they may punc-  
ture the drain pan and cause  
water leakage.  
Siphon  
0966_X_I  
Fig. 3-12  
10  
S4359128  
Ceiling Panel  
Never touch or attempt to  
move the air direction louver  
by hand or you may damage  
the unit. Instead, use the  
remote control unit if you  
want to change the direction  
or air flow.  
CAUTION  
3-6. Before Installing the Ceiling Panel  
(1) Remove the air-intake grille and air filter from the  
ceiling panel. (Figs. 3-13 and 3-14)  
(a) Remove the 2 screws on the latch of the air-  
intake grille. (Fig. 3-13)  
Screw  
(b) Press on the 2 latches of the air-intake grille  
with your thumb in the direction of the arrow  
to open the grille. (Fig. 3-13)  
Latch  
(c) With the air-intake grille open about 45˚,  
remove the safety string (hook on the grille  
side). (Fig. 3-14)  
Air intake grille  
(d) Pull the air-intake grille towards you to  
remove it from the ceiling panel.  
(2) Pull down the two panel catches on the body of  
the indoor unit body. (Fig. 3-15)  
Ceiling panel  
0149_X_I  
Fig. 3-13  
Air filter  
45°  
Safety string  
Fig. 3-14  
0150_X_I  
11  
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3-7. Installing the Ceiling Panel  
(1) Lift the ceiling panel and position it to align the  
panel hook with the panel catch of the indoor unit.  
(5) Install the air filter and air-intake grille by perform-  
ing the steps in section 3-6 in reverse.  
NOTE  
NOTE  
The ceiling panel must be mounted in the correct  
direction. Note that the 2 catches of the panel differ in  
size.  
Rehook the safety string before closing the air-intake  
grille.  
Confirm that the catches are correctly matched be-  
tween the ceiling panel and the indoor unit body.  
3-8. When Removing the Ceiling Panel for  
Servicing  
(2) Next, check to see that the ceiling panel is prop-  
erly aligned with the seamline of the ceiling. If it is  
not, remove the ceiling panel and slightly readjust  
the indoor unit body to the proper suspension  
point.  
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) When the ceiling panel has been properly  
aligned, use the supplied 4 mounting screws (M5)  
with washers to permanently fasten the ceiling  
panel.  
(4) Install the wiring connector from the ceiling panel  
to the connector in the electrical component box  
of the indoor unit. After installing the connector,  
use the clamp on the body of the indoor unit to  
secure the wiring.  
Panel catch  
(pull down)  
Connector on unit  
(inside electrical component box)  
Electrical component box  
Connector of ceiling panel  
Ceiling panel  
Unit body  
Electrical  
component box  
Panel catch (pull down)  
Clamp  
Ceiling panel wiring  
connector  
Ceiling panel  
Screws M5 with washer  
Mark  
Air filter  
Air-intake grille  
Fig. 3-15  
0967_X_I  
12  
S4359128  
3-9. Duct for Fresh Air  
Air-intake chamber (including Duct connection box and flange) are attached to the indoor unit when used to  
take fresh outdoor air.  
High-performance filter or Super long-life filter can be also installed in the air-intake chamber.  
(1) SETUP PRIOR TO INSTALLATION  
When installing the high performance filter or super long-life filter, the parts and parts numbers of filters to be  
assembled with the air-intake chamber are listed below. Please check that the correct part numbers are  
present.  
High performance  
filter  
Air-intake  
chamber  
Super long-life  
filter  
AFT-MSJ80T  
AFT-HSJ80T  
CMB-GSJ80T  
(XS1852)  
AFT-LSJ80T  
(2) ACCESSORIES  
Check that the following parts are in the box when unpacking.  
NAME  
Cord with socket  
(9P)  
QT’Y  
1
REMARKS  
Connecting line. Connect only when  
high-performance filter is used  
Screw  
(M5 × L125)  
Air-intake filter  
(for fastening)  
4
Screw  
(M4 × L12)  
Duct connection flange/ box  
(for fastening)  
4+4  
Duct connection box  
1
1
(for fresh air)  
)
(for connecting fresh air duct  
Duct connection flange  
(3) INSTALLATION  
(a) Setup for the indoor unit  
When assembling the high-performance filter, open the lid of the electrical component box, remove the socket  
(9P) of the fan motor cable inside the electrical component box and connect the accessory cord with socket (9P).  
Do not connect the “acces-  
sory cord with socket” to  
the electrical component box  
when the unit is used to take  
fresh air.  
CAUTION  
Cord with socket  
(9P)  
Do not connect the “acces-  
sory cord with socket” when  
assembling the super long-  
life filter.  
Always store the “accessory  
cord with socket” inside the  
electrical component box.  
Installation steps (a) to (b) are the same for both  
the CMB-GSJ80T and the GSJ140T. The drawing  
illustrates installation of air-intake chamber to the  
CMB-GSJ80T.  
Electrical  
component box  
1114_X_S  
Fig. 3-16  
13  
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(b) INSTALLING THE AIR-INTAKE CHAMBER  
Set the air-intake chamber to the indoor unit taking  
care not to set to the incorrect direction. (Fig. 3-17)  
Fasten the air-intake camber with the accessory  
screws. (M5 × L125, 4pcs) (Fig. 3-17)  
Installation screws  
Socket cover  
(c) INSTALLING THE DUCT CONNECTION BOX  
Fasten the duct connection flange to the duct  
connection box with the accessory screws (M4 ×  
L12, 4 pcs.). (Fig. 3-18)  
Put the duct connction box into the rectangular hole  
of the air-intake chamber and fasten it to the both  
sides of the indoor unit and chamber with the  
accessory screws (M4 × L12, 4 pcs.). (Fig. 3-18)  
Air-intake chamber  
(6P socket)  
(d) INSTALLING THE INDOOR UNIT  
3P socket  
(from ceiling panel)  
Install the indoor unit to the ceiling.  
3P plug  
(electrical  
(Install the indoor unit according to items 3-1 to 3-6.)  
Operation  
selector  
component box)  
(e) INSTALLING THE CEILING PANEL  
Attach the ceiling panel to the chamber.  
Remove the socket cover of the air-intake chamber  
and pass the 3P and 6P sockets through it. (Fig. 3-17)  
Connect the 3P socket to the 3P plug of the indoor  
unit electrical component box.  
Indoor unit  
6P plug  
1115_X_S  
Fig. 3-17  
Connect the 6P socket to the 6P plug from the  
operation selector.  
Reattach the socket cover.  
Installation screws Installation screws  
(f) INSTALLING THE HIGH-PERFORMANCE FILTER  
(M4 × 12)  
(M4 × 12)  
OR SUPER LONG-LIFE FILTER (Fig. 3-18)  
Turn the filter hooks of the air-intake chamber.  
Install high-performance or super long-life filter into  
the chamber. (Install in the correct direction. Set the  
filter so that the arrow on the side as shown in the  
Duct  
connection box  
Air filter  
Arrow  
Duct  
connection  
flange  
drawing on the right can be installed into  
air-intake chamber.  
the  
Rectangular  
hole  
Turn the filter hook (positioned so the filter frame is  
Filter hook  
aligned) and secure the air filter in place.  
Ceiling panel  
Take adequate precautions  
CAUTION  
when installing onto the  
ceiling. The air-intake cham-  
ber is especially prone to  
rupture if struck on it’s side.  
1113_X_S  
Fig. 3-18  
14  
S4359128  
4. How to Install the Remote Control Unit  
Wireless Remote Control Unit  
The remote control unit can be operated from either a  
non-fixed position or a wall-mounted position.  
To ensure that the air conditioner operates correctly,  
do not install the remote control unit in the following  
places:  
In direct sunlight  
Behind a curtain or other place where it is covered  
More than 26 ft. away from the air conditioner  
In the path of the air conditioner’s airstream  
Where it may become extremely hot or cold  
Where it may be subject to electrical or magnetic  
interference  
Removable mounting  
4-1. Mounting on a Wall  
Wall  
(1) Removable mounting  
(a) Momentarily hold the remote control unit in  
the desired mounting position.  
(b) Confirm that the air conditioner responds  
correctly when you press keys on the  
remote control from that position.  
Special  
mounting  
screw  
(Packed in indoor unit)  
(c) After confirming correct operation, use a  
screwdriver to screw the supplied special  
mounting screw into the wall. (Fig. 4-1)  
0532_M_I  
Fig. 4-1  
(d) Hang the remote control unit from the  
mounting screw.  
(2) Non-removable mounting  
(a) Momentarily hold the remote control unit in  
the desired mounting position.  
Non-removable mounting  
(b) Confirm that the air conditioner responds  
correctly when you press keys on the  
remote control from that position.  
Wall  
(c) After confirming correct operation, use a  
screwdriver to screw the mounting screw  
into the wall. (Fig. 4-1)  
(d) Remove the remote control cover by sliding  
it downward.  
Screw  
(Packed in indoor unit)  
(e) Remove the batteries of the remote control  
unit.  
0533_M_I  
Fig. 4-2  
(f) Hang the remote control unit from the  
mounting screw, and use a screwdriver to  
screw the remote control unit securing  
screw into the wall through the hole in the  
battery compartment. (Fig. 4-2)  
(g) Replace the batteries.  
(h) Again confirm that the remote control unit  
operates correctly.  
15  
S4359128  
Wired Remote Control Unit (Option)  
Electrical  
Cover plate  
component box  
(1) To access the printed circuit board, remove the  
cover plate of the electrical component box.  
(2) Attach the remote control connectors securely to  
the mating connector pins on the printed circuit  
board.  
(3) Turn the R.C.U. switch from “WIRELESS” to  
“WIRED”.  
(4) Replace the cover plate.  
Do not supply power to  
the unit until the tubing and  
wiring to the outdoor unit is  
completed.  
The mounting position for the remote control unit  
should be located in an accessible place for control  
and permit the average room temperature to be  
detected. Never cover the unit or recess it into the wall.  
Connector for the wired  
remote control unit  
WIRED  
WIRELESS  
R.C.U. Switch  
1006_M_I  
Fig. 4-3  
4-2. Installing the Wired Remote Control Unit  
(1) Use a ballpoint pen or similar pointed object to  
remove the plastic bushing which is inserted in  
the rear of the remote control unit. The bushing  
can be discarded. (Fig. 4-4)  
Flat-head  
Groove  
tapping screw  
25/64"(3 × 10 mm)  
(SATA)  
Cord  
Rear  
Plastic  
bushing  
(2) Align the cord with the groove of the remote  
control unit.  
Cord clip  
Ballpoint  
pen  
(3) Attach the mounting plate to the wall with the 2  
supplied screws. Then align the rail on the rear of  
the control unit with the slot of the mounting plate  
and slide the unit down as far as it will go. (Fig. 4-4)  
Fix the control unit cord to the wall.  
Remote  
control  
unit  
Remote  
control  
unit  
Mounting  
plate  
(4) If local codes allow, the remote control unit cord  
can be wired in the wall. (Fig. 4-5)  
Truss-head  
tapping screw  
5/8"(4 × 16 mm)  
(TOTA)  
Wall  
1020_M_I  
0531_M_I  
Fig. 4-4  
Fig. 4-5  
16  
S4359128  
5. Address Switches  
If you are installing one indoor unit or one group of  
indoor units in the same room, it is necessary for you  
to assign each unit its own address so that each can  
be operated by its own remote control unit. You assign  
the addresses by matching the switch position of each  
indoor unit with the switch position of its remote control  
unit. The switch of the remote control unit is shown in  
Fig. 5-1.  
A
B
5-1. Finding the Address Switches  
Address  
Remote Control Unit  
Remove the lid by sliding it off. You can see the  
switches inside the battery compartment. (Fig. 5-1)  
Indoor Unit  
Address switch is in “A” position  
at time of shipment.  
1008_M_I  
(1) Turn off the Power Switch.  
(2) Remove the Grille.  
(3) Remove the cover of the Electrical Component  
Box.  
Fig. 5-1  
5-2. Switch Positions for 2 Units or 2 Groups of Units  
Table 5-1 shows the positions you can use for up to 2  
units or 2 groups of indoor units installed in the same  
room. Two remote control units are necessary to allow  
the respective units or group to be controlled indepen-  
dently.  
Table 5-1  
Remote Control  
Address switch  
Indoor Unit  
Unit No.  
Address switch  
1
2
1
2
A
B
OFF  
ON  
OFF  
ON  
The indoor unit address switch is set at 1-OFF & 2-OFF  
position at shipment.  
NOTE  
An indoor unit cannot be controlled if its remote control  
unit is too far away (more than 26 ft.). If the remote  
control unit does not work correctly, bring it closer to  
the unit being operated and try again. There should be  
no obstacles between the remote control unit and the  
indoor unit. For this reason, if the remote control unit is  
to be used from a fixed position, check the operation  
before mounting.  
P.C.B  
ON  
1
2
WIRED  
WIRELESS  
R.C.U. Switch  
Address Switch  
(DSW1)  
1321_M_I  
Fig. 5-2  
17  
S4359128  
6. Electrical Wiring  
6-1. General Precautions on Wiring  
(7) Regulations on wire diameters differ from locality  
to locality. For field wiring rules, please refer to  
your LOCAL ELECTRICAL CODES (ex. National  
Electric Code: ANSI/NFPA70) before beginning.  
You must ensure that installation complies with all  
relevant rules and regulations.  
(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.  
(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.  
(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.  
The inter-unit control wiring and the remote control  
wiring (option) should be wired apart from the inter-  
unit power wiring.  
(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.  
(5) Do not allow wiring to touch the refrigerant tubing,  
compressor, or any moving parts of the fan.  
(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.  
6-2. Recommended Wire Length and Wire Diameter for Power Supply System  
Power Supply Terminal Base  
(Outdoor Unit)  
(B)*1 Inter-unit  
Wiring  
Time Delay  
Fuse or  
Circuit  
(A)*1 Power Supply  
Models  
Max. Wire  
Diameter  
Capacity  
Capacity  
AWG #12  
75 ft.  
AWG #12  
65 ft.  
C1852, CL1852  
15 A  
20 A  
AWG #12  
*1 Refer to the Wiring System Diagrams (See Fig. 6-3) for the meaning of “A”, “B”.  
Terminal  
block  
AWG = American Wire Gauge  
Lock nut  
Access panel  
6-3. Wiring Instructions for the Outdoor Unit  
(1) To take off the access panel, remove the 4  
screws. (See Fig. 6-1)  
(2) Dismount plugs on the conduit plate.  
(3) Temporarily mount the conduits on the conduit  
Conduit  
plate  
plate.  
(4) Properly connect both the power supply and inter-  
unit lines to the corresponding terminals on the  
terminal block.  
Refer to the wiring diagram in Fig. 6-2 (which also  
appears on the access panel).  
Plug  
Power supply  
Inter-unit line  
1822_M_I  
Fig. 6-1  
18  
S4359128  
INDOOR  
INDOOR UNIT  
NOTE  
OUTDOOR UNIT  
Conduit's trade size for this unit is 1/2". The  
(Inter-unit)  
Power lines  
conduit can be purchased at a hardware store.  
B
230/208 V  
230/208 V  
230/208 V  
1
2
3
1
Fuse  
The fuse located in the outdoor unit provides  
power supply protection and may blow when  
power is applied if the system has been  
incorrectly wired.  
2
3
4
A
Disconnect  
switch  
(Field supply)  
L1  
5
L2  
6
(5) Ground the unit in accordance with local codes.  
G
G
(6) Be sure to size each wire allowing several inches  
longer than the required length for wiring.  
Grounding  
line  
1823_M_I  
Fig. 6-2  
(7) Use lock nuts to secure the conduit tubes.  
Be sure to comply with  
local codes while running  
the wire from the indoor  
unit to the outdoor unit  
(size of wire and wiring  
method, etc.).  
Every wire must be  
connected firmly.  
No wire should be  
allowed to touch  
To avoid the risk of  
electric shock, each air  
conditioner unit must be  
grounded.  
Be sure to connect the  
power supply line to the  
outdoor unit as shown in  
the wiring diagram. The  
indoor unit draws its  
power from the outdoor  
unit.  
CAUTION  
refrigerant tubing, the  
compressor or any  
moving part.  
6-4. Examples of Incorrect Wiring  
The following are examples of improper wiring that result in system misoperation. You should confirm that you  
have wired the units correctly before beginning the test run.  
Problem 1  
Problem 2  
Short circuit will occur after approx.  
3 minutes and the power circuit  
fuse blows.  
Air conditioner will not operate.  
Disconnect  
switch  
Disconnect  
(B)  
Disconnect  
switch  
(A)  
(C)  
switch  
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
G
G
G
G
G
G
Grounding line  
Grounding line  
Grounding line  
Indoor unit  
Outdoor unit  
Indoor unit  
Outdoor unit  
Indoor unit  
Outdoor unit  
1301_C_I  
1302_C_I  
1303_C_I  
Problem 3  
Compressor will not start; only indoor unit will operate.  
Disconnect  
switch  
Disconnect  
switch  
(D)  
(E)  
1
2
3
1
2
3
1
2
3
1
2
3
G
G
G
G
Grounding line  
Grounding line  
Indoor unit  
Outdoor unit  
Indoor unit  
Outdoor unit  
1304_C_I  
1305_C_I  
19  
S4359128  
Loose wiring may cause the  
terminal to overheat or result  
in unit malfunction. A fire  
hazard may also exist.  
Therefore, ensure that all  
wiring is tightly connected.  
When connecting each power wire to the correspond-  
ing 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.  
6-5. How to Connect Wiring to the Terminal  
Solid wire  
Insulation  
Loop  
For solid core wiring (or F-cable)  
(1) Cut the wire end with a wire cutter or wire-cutting  
pliers, then strip the insulation to expose the solid  
wire about 1 in.. (Fig. 6-3)  
1004_M_I  
(2) Using a screwdriver, remove the terminal  
screw(s) on the terminal plate.  
Fig. 6-3  
(3) Using the pliers, bend the solid wire to form a  
loop suitable for the terminal screw.  
Stranded wire  
(4) Shape the wire loop properly, position it on the  
terminal plate and fix it securely with the terminal  
screw using a screwdriver.  
Ring  
pressure  
terminal  
For stranded wiring  
(1) Cut the wire end with a wire cutter or wire-cutting  
pliers, then strip the insulation to expose the  
stranded wiring about 3/8 in.. (Fig. 6-4)  
1106_M_I  
Fig. 6-4  
(2) Using a Pillips head screwdriver, remove the  
terminal screw(s) on the terminal plate.  
Special  
washer  
Screw  
(3) Using a ring connector fastener or pliers, securely  
clamp each stripped wire end with a ring pressure  
terminal. (Fig. 6-4)  
Ring pressure  
terminal  
Screw and  
Special washer  
Terminal plate  
Wire  
(4) Place the ring pressure terminal, and replace and  
tighten the removed terminal screw using a  
screwdriver. (Fig. 6-5)  
Ring  
connector  
Wire  
1308_M_I  
Fig. 6-5  
20  
S4359128  
7. How to Process Tubing  
Deburring  
The narrow tubing side is connected by flare nut, and  
the wide tubing side is connected by brazing.  
Before  
After  
7-1. Use of the Flaring Method  
Many of the 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.  
7-2. Flaring Procedure with a Flare Tool  
(1) Cut the copper tube to the required length with a  
tube cutter. It is recommended to cut about  
0126_M_I  
Fig. 7-1  
12 – 20 in. longer than the estimated tubing length.  
(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. 7-1)  
Copper  
tubing  
NOTE  
Reamer  
When reaming, hold the tube end downward and be  
sure that no copper scraps fall into the tube. (Fig. 7-2)  
(3) Remove the flare nut from the unit and mount it  
on the copper tube.  
0127_M_I  
Fig. 7-2  
(4) Make a flare at the end of copper tube with a flare  
tool.* (Fig. 7-3)  
®
*Use “RIGID ” or equivalent.  
NOTE  
Flare nut  
A good flare should have the following characteristics:  
Copper  
tubing  
inside surface is glossy and smooth.  
edge is smooth.  
tapered sides are of uniform length.  
Flare tool  
0128_M_I  
7-3. Precaution before Connecting Tubes Tightly  
Fig. 7-3  
(1) Apply a sealing cap or water-proof tape to pre-  
vent dust or water from entering the tubes before  
they are used.  
(2) Apply refrigerant lubricant to the matching sur-  
faces of the flare and union before connecting  
them together. This helps to reduce gas leaks.  
(Fig. 7-4)  
Apply refrigerant  
lubricant here and here  
0129_M_I  
Fig. 7-4  
(3) For proper connection, align the union tube and  
flare tube with each other, then screw in the flare  
nut lightly at first to obtain a smooth match.  
(Fig. 7-5)  
Adjust the shape of the narrow and wide tubes  
using a tube bender at the installation site and  
connect them to the each tubing side valve using  
a flare nut.  
Union  
Flare nut  
0130_M_I  
Fig. 7-5  
21  
S4359128  
7-4. Precautions during Brazing  
Torque wrench  
Replace air inside the tube with nitrogen gas to  
prevent copper oxide film from forming during the  
brazing process.  
Spanner  
Indoor unit  
Do not allow the tubing to get too hot during the  
brazing process.  
Outdoor unit  
The nitrogen gas inside the tubing may overheat,  
causing refrigerant system valves to become  
damaged. Therefore allow the tubing to cool be-  
tween brazings.  
0131_C_I  
Fig. 7-6  
7-5. Connecting Tubing between Indoor and  
Outdoor Units  
Refrigerant tubing  
Seal (supplied)  
Insulation tape (white)  
(supplied)  
(1) Tightly connect the indoor side refrigerant tubing  
with the outdoor side tubing. (Fig. 7-6)  
Flare insulator (supplied)  
Tube insulator  
(not supplied)  
(2) To fasten the flare nuts, apply specified torque as:  
Unit side  
insulator  
Table 7-1  
Tube Dia.  
Tightening Torque  
Flare nut  
Vinyl clamps (supplied)  
Approx. 140 — 180 kg-cm  
(120 — 160 Ibs-in.)  
1015_X_I  
1/4" (6.35 mm)  
Fig. 7-7  
Approx. 680 — 820 kg-cm  
(590 — 710 lbs-in.)  
5/8" (15.88 mm)  
7-6. Insulating the Refrigerant Tubing  
Always insulate tubes after  
Refrigerant tubing and insulator  
(not supplied)  
Drain insulator  
and clamp.  
Large  
Drain pipe and insulator  
(not supplied)  
CAUTION  
completing leak tests on all  
connection points.  
(supplied)  
Important  
Packing  
clamp.  
Small  
hose band  
(supplied)  
To avoid condensation and water leaks, the wide and  
narrow tubes must be insulated with the supplied  
insulation materials.  
Insulation  
tape  
Vinyl  
clamp  
insulator  
Flare  
Taping the flare nuts  
Seal  
Wind white insulation tape around the flare nuts at the  
wide and narrow tube connections. Place the seal  
(supplied) on the unit. Then cover up the tubing  
connections with the flare nut insulator, and cover the  
gap at the union with the supplied black insulation  
tape. Finally, fix the insulator at both ends with vinyl  
clamps. (Fig. 7-7)  
0558_X_I  
Never grasp the drain or refrigerant connecting  
outlets when moving the unit.  
Insulation material  
Fig. 7-8  
The material used for insulation must have good  
insuIation characteristics, be easy to use, be age  
resistant, and must not easily absorb moisture.  
After a tube has been insu-  
CAUTION  
lated, never try to bend it  
because it can cause the  
tube to break or crack.  
22  
S4359128  
Important  
Insulation  
Because capillary tubing is installed in the outdoor unit,  
both the wide and narrow tubes of this air conditioner  
become cold. Therefore, to prevent heat loss and wet  
floors due to dripping of condensation water, both  
tubes must be well insulated with proper insulation  
material. The thickness of the insulation material  
should be a min. 8 mm (5/16").  
Thickness:  
Min. 5/16 in.  
Thickness:  
Min. 5/16 in.  
Narrow tube  
Wide tube  
0999_C_I  
7-7. Taping the Tubes  
(1) At this time, the refrigerant tubes (and electrical  
wiring if local codes permit) should be taped with  
armoring tape in 1 bundle. To prevent the con-  
densation from overflowing the drain pan, keep  
the drain hose separate from the refrigerant  
tubing.  
(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. (Fig. 7-9)  
Clamp  
Drain hose  
Insulated tubes  
(3) Clamp the tubing bundle to the wall, using 1  
clamp about every 3 feet.  
NOTE  
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.  
0136_M_I  
Fig. 7-9  
7-8. Finishing the Installation  
Apply putty here  
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. 7-10)  
Tubing  
0137_C_I  
Fig. 7-10  
23  
S4359128  
8. Air Purging  
Indoor unit  
Air and moisture remaining in the refrigerant system have  
undesirable effects as indicated below. Therefore, they  
must be purged completely.  
pressure in the system rises  
operating current rises  
Outdoor unit  
cooling (or heating) efficiency drops  
moisture in the air may freeze and block capillary tubing  
water may lead to corrosion of parts in the refrigerant  
system  
Air Purging with a Vacuum Pump (for Test Run)  
(1) Check that each tube (both narrow and wide tubes)  
between the indoor and outdoor units have been  
properly connected and all wiring for the test run has  
been completed.Note that both narrow and wide tube  
service valves on the outdoor unit are kept closed at  
this stage.  
Manifold valve  
(2) Using an adjustable wrench or box wrench, remove  
the valve caps from the service valve on both narrow  
and wide tubes.  
Pressure  
gauge  
Lo  
Hi  
(3) Connect a vacuum pump and a manifold valve (with  
pressure gauges) to the service port on the wide tube  
service valve. (Fig. 8-1)  
Be sure to use a manifold valve  
for air 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.  
CAUTION  
Vacuum pump  
1824_M_I  
(4) With the “Lo” knob of the manifold valve open, run the  
vacuum pump. The operation time for the vacuum  
pump varies with tubing length and the capacity of the  
pump. The following table shows the amount of time  
for evacuation:  
Fig. 8-1  
Required time for evacuation when capacity  
of 100 liter/h vacuum pump is used  
If tubing length is  
If tubing length is  
less than 33 ft. (10 m)  
more than 33 ft. (10 m)  
10 min. or more  
15 min. or more  
NOTE  
The required time in the above table is calculated based on  
the assumption that the ideal (or target) vacuum condition  
is around 10 mmHg abs.  
24  
S4359128  
(5) With the vacuum pump still running, close the “Lo”  
knob of the manifold valve. Then stop the vacuum  
pump.  
90° (1/4 turn)  
Narrow tube  
(6) With the accessory hex wrench, turn the valve stem  
on the narrow tube service valve counter-clockwise by  
90 degress (1/4 turn) for 10 seconds, and then turn  
the stem clockwise to close it again. (Fig. 8-2)  
Hex wrench  
Wide tube  
Be sure to completely insert  
the hex wrench before  
CAUTION  
attempting to turn the valve.  
Valve cap  
Vacuum hose to manifold valve  
(7) Leak test all joints at the tubing (both indoor and  
outdoors) with liquid soap. Bubbles indicate a leak. Be  
sure to wipe off the soap with a clean cloth.  
1825_M_I  
Fig. 8-2  
(8) With the hex wrench, turn the wide tube service valve  
stem counter-clockwise to fully open the valve.  
(9) Turn the narrow tube service valve stem counter-  
clockwise to fully open the valve.  
(10) Loosen the vacuum hose connected to the wide tube  
service port slightly to release the pressure. Then,  
remove the hose.  
(11) Replace the bonnet and flare nut on the wide tube  
service port and fasten the flare nut securely with an  
adjustable wrench or box wrench or box wrench.  
Next, mount the valve cap and tighten it with a torque  
wrench (the cap needs to be tightened with the torque  
of 170 ibs.·in. (200 kg·cm)). This process is very  
important to prevent gas from leaking from the  
system.  
(12) Test run the air conditioner. (See next page.)  
(13) While the air conditioner is running, apply liquid soap  
to check for any gas leaks around the service valves  
or caps.  
(14) If there is no leakage, stop the air conditioner.  
(15) Wipe off the soap on the tubing.  
This completes air purging with a vacuum pump and the air  
conditioner is ready for actual operation.  
25  
S4359128  
9. Test Run  
9-1. Performing Test Run  
TEST OFF ON  
Operation  
selector  
Be careful since the fan will  
CAUTION  
start when performing Test  
Run.  
(1) The Operation Selector is located on the electrical  
component box inside the indoor unit. To access the  
Operation Selector, press the two latches of the air  
intake grille in the direction of the arrow to open the  
grille. Open the air intake grille downward.  
(Fig. 9-1)  
Air filter  
Air intake grille  
(2) Set the Operation Selector to the “Test” position.  
The air conditioner will start running.  
1323_M_I  
Fig. 9-1  
(3) Let the unit run for about 30 minutes and check that  
the unit operates normally.  
(4) After the Test Run, be sure to reset the Operation  
Selector to the “ON” position for normal operation.  
The air conditioner continues to run .  
(5) Referring to the Operating Instructions, select the  
Cooling mode and press the ON / OFF operation  
button on the remote control unit, to confirm remote  
control unit operation.  
Important  
Set the Operation Selector at the “ON” position. Other-  
wise the unit will stop or will not run correctly.  
9-2. Performing Test Run with Optional Wired  
Remote Control Unit  
Service TEST RUN  
switch  
(1) Service TEST RUN switch is located on the rear  
side of the remote control unit. Set the switch to the  
TEST RUN position. (Fig. 9-2)  
RUN  
TEST  
RUN  
(2) Referring to the Operating Instructions, select the  
cooling mode and press the ON / OFF operation  
button on the remote control unit.  
(3) The air conditioner will start running 3 minutes after  
the ON / OFF operation button is pressed.  
(Bottom)  
Remote control unit  
viewed from rear  
(4) Let the unit run for about 30 minutes and check that  
it operates normally.  
0543_M_I  
Fig. 9-2  
(5) Press the ON / OFF operation button again to stop  
the unit.  
Important  
Set the Service Test RUN switch at “RUN” position,  
otherwise the unit will not run correctly.  
26  
S4359128  
9-3. Basic Function of the Service Valves  
The basic function of the service valves are given in Table 7 below.  
Narrow Tube Service  
Valve (2-Way)  
Wide Tube Service  
Valve (3-Way)  
Action  
O-ring  
Valve cap  
Stem  
Shipping  
1827_M_I  
1826_M_I  
Operating and  
test running the  
air conditioner  
1829_M_I  
1828_M_I  
Measuring  
pressure  
and gas charging  
1831_M_I  
1830_M_I  
Air purging with a  
vacuum pump  
1833_M_I  
1832_M_I  
The service port on the wide tube service  
valve uses a Schrader core valve to access  
the refrigerant system. Therefore, be sure to  
use a hose connector which has a push-pin  
inside. (Fig. 9-3)  
Service valve  
Hose with push-pin  
PUSH  
1834_M_I  
Fig. 9-3  
9-4. Pump Down  
Pump down means collecting all refrigerant gas in the  
system back into the outdoor unit without losing any of  
the gas. Pump down is used when the unit is to be  
moved or before servicing the refrigerant circuit  
valve clockwise all the way to close the service  
valve. (Be sure to confirm that the wide tube  
service valve is fully open.)  
(3) Press the operation button and start cooling  
operation.  
Pump Down Procedure  
Be sure to carry out pump down with the unit in  
cooling mode.  
(4) When the low pressure gauge reading falls to 1 to  
0.5 kg/cm2 (14.2 to 7.1 PSI), fully close the wide  
tube valve stem with a standard screwdriver. Then  
quickly stop the unit.  
(1) Connect the Lo side charging hose of the manifold  
valve to the service port on the wide tube service  
valve.  
(5) Disconnect all gauges and hose, and replace the  
bonnets and the valve caps as they were before.  
(2) Using a hex wrench, turn the narrow tube service  
27  
S4359128  

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