INSTALLATION INSTRUCTIONS
— Split System Air Conditioner —
CONTENTS
IMPORTANT Page
Please Read Before Starting
1. GENERAL.............................................................3
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied with Unit
1-3. Optional Copper Tubing Kit
1-4. Type of Copper Tube and Insulation Material
1-5. Additional Materials Required for Installation
1-6. Operating Range
1-7. Tubing Length
2. SELECTING THE INSTALLATION SITE ............ 5
Indoor Unit
Outdoor Unit
2-1. Baffle Plates for the Outdoor Unit
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
■ 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
3-9. Duct for Fresh Air
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
Model Combinations
Combine indoor and outdoor units only as listed below.
Indoor units Outdoor units
XS1852 (PNR-XS2432) C1852, CL1852
Power Supply :
60Hz, single-phase, 208/230 V
Units should be installed by licensed contractor
according to local code requirements
7. HOW TO PROCESS TUBING ........................... 21
7-1. Use of the Flaring Method
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
8. AIR PURGING ....................................................24
■ Air Purging with a Vacuum Pump
(for Test Run)
9. TEST RUN ..........................................................26
9-1. Performing Test Run
9-2. Performing Test Run with Optional Wired
Remote Control Unit
9-3. Basic Function of the Service Valves
9-4. Pump Down
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
85464359128000 SANYO 2000
SANYO FISHER COMPANY
A DIVISION OF SANYO NORTH
AMERICA CORPORATION
21605 Plummer Street
1
S4359128
Chatsworth, CA91311
Important
IMPORTANT!
Please Read Before Starting
This air conditioning system meets strict safety and
operating standards. As the installer or service person, it
is an important part of your job to install or service the
system so it operates safely and efficiently.
For safe installation and trouble-free operation,you
must:
ⓦ Carefully read this instruction booklet before beginning.
ⓦ Follow each installation or repair step exactly as shown.
ⓦ Observe all local, state, and national electrical codes.
ⓦ Pay close attention to all warning and caution notices
given in this manual.
This symbol refers to a hazard
or unsafe practice which can
result in severe personal injury
or death.
This symbol refers to a hazard
CAUTION
or unsafe practice which can
result in personal injury or
product or property damage.
If Necessary, Get Help
These instructions are all you need for most installation
sites and maintenance conditions. If you require help for a
special problem, contact our sales/service outlet or your
certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for
improper installation or maintenance service, including
failure to follow the instructions in this document.
SPECIAL PRECAUTIONS
When Wiring
……………………………………………………………………
ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO
WIRE THIS SYSTEM.
• Do not supply power to the unit until all wiring and
tubing are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this
system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and
inadequate grounding can cause accidental injury or
death.
• Ground the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause
overheating at connection points and a possible fire
hazard.
When Transporting
……………………………………………………………………
Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your knees
when lifting to reduce strain on your back. Sharp edges or
thin aluminum fins on the air conditioner can cut your
fingers.
When Installing
……………………………………………………………………
…In a Room
Properly insulate any tubing run inside a room to prevent
“sweating” that can cause dripping and water damage to
walls and floors.
…In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide a
solid, level foundation for the outdoor unit. This prevents
water damage and abnormal vibration.
…In an area with High Winds
Securely anchor the outdoor unit down with bolts and a
metal frame. Provide a suitable air baffle.
…In a Snowy Area
(for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher
than drifting snow. Provide snow vents.
When Connecting Refrigerant Tubing
……………………………………………………………………
• Execute enough ventilation in case refrigerant gases
leak during operations. Be careful that the contact of the
refrigerant gases with the flare will cause the generation
of poisonous gases.
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces of
the flare and union tubes before connecting them, then
tighten the nut with a torque wrench for a leak-free
connection.
• Check carefully for leaks before starting the test run.
NOTE
Depending on the system type, liquid and gas lines may
be either narrow or wide. Therefore, to avoid confusion the
refrigerant tubing for your particular model is specified as
either “narrow” or “wide” rather than as “liquid” or “gas”.
When Servicing
……………………………………………………………………
• Turn the power OFF at the main power box (mains)
before opening the unit to check or repair electrical
parts and wiring.
• Keep your fingers and clothing away from any moving
parts.
• Clean up the site after you finish, remembering to check
that no metal scraps or bits of wiring have been left
inside the unit being serviced.
2
S4359128
1. General
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.
1-1. Tools Required for Installation (not supplied)
1. Standard screwdriver
2. Phillips head screwdriver
3. Knife or wire stripper
4. Tape measure
5. Level
6. Sabre saw or key hole saw
7. Hacksaw
8. Core bits
9. Hammer
10. Drill
11. Tube cutter
12. Tube flaring tool
13. Torque wrench
14. Adjustable wrench
15. Reamer (for deburring)
16. Service valve wrench
17. Wire cutter
1-2. Accessories Supplied with Unit
Table 1-1
Part Name Figure Q’ty Remarks
Full-scale
installation
diagram
Flare
insulator
Installation
gauge
For determining
suspension bolt
1
pitch
For wide tubes
1
For adjusting the
1
unit position
Part Name Figure Q’ty
Wireless
remote control unit
AAA alkaline
battery
Tapping screw
Tapping screw
Special
screw
4 ✕ 16 mm
TOTA 4 ✕ 16
1
2
1
1
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.
1-4. Type of Copper Tube and Insulation Material
If you wish to purchase these materials separately
from a local source, you will need:
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).
Check local electrical codes
CAUTION
and regulations before
obtaining wire. Also, check
any specified instructions or
limitations.
Insulating
tape
(White for insulating)
Hose band
Packing
Drain
insulator
Drain hose
Drain hose
adapter
Owner’s
manual
Hexagonal
Wrench*
*Packed in the outdoor unit
For wide tube
1
flare nuts
For securing drain
2
hose
1
For drain joint
For drain joint
1
1
1
For drain outlet
1
To open and shut
the Narrow Tube
1
Service Valve
1-5. Additional Materials Required for Installation
1. Insulated staples or clamps for connecting wire
(See your local codes.)
2. Putty
3. Refrigeration tubing lubricant
4. Clamps or saddles to secure refrigerant tubing
5. Scale for weighing
1-6. Operating Range
Temperature Indoor Air Intake Outdoor Air Intake
Maximum 95°F DB, 71°F WB 115°F DB
Minimum 67°F DB, 57°F WB 67°F DB (0°F DB)*
*CL&&&& Models
3
Cooling
S4359128
1-7. Tubing Length
● Refrigerant tubing between the indoor and outdoor
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)
Table 1-2
Models C1852
Tubing Data
Tubing size
outer dia.
Narrow tube in. (mm) 1/4 (6.35): Thickness 0.0314" (0.8 mm)
Wide tube in. (mm) 5/8 (15.88): Thickness 0.0394" (1.0 mm)
CL1852
Limit of tubing length (ft.) 65
Limit of elevation
difference between
the 2 units
Outdoor unit is higher
than indoor unit (ft.)
Outdoor unit is lower
than indoor unit (ft.)
Max. allowable tubing length at shipment (ft.) 33
Required additional refrigerant *
1
(oz./ft.) 0.27
INDOOR
UNIT
23
23
Tubing length (L)
OUTDOOR
UNIT
0711_M_I
Fig. 1-1
No additional charge of compressor oil is necessary.
*1If 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:
● select an appropriate position from which every
corner of the room can be uniformly cooled.
● select a location where the ceiling is strong enough
to support the weight of the unit.
● select a location where tubing and drain pipe have
the shortest run to the outdoor unit.
● allow room for operation and maintenance as well
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.
3 ft.
3 ft.
3 ft.
3 ft.
3 ft.
1330_X_S
Fig. 2-1
NOTE
Air delivery will be degraded if the distance from the
floor to the ceiling is greater than 10 ft..
5
S4359128
Air intake
Concrete
or equal
About 4" (10 cm)
Min. 4"
(10 cm)
Anchor bolts
(4 pcs)
About 16" (40 cm)
1820_M_I
Outdoor Unit
AVOID:
● heat sources, exhaust fans, etc. (Fig. 2-2)
● damp, humid or uneven locations.
Hot air
NO
Exhaust fan
Heat source
Outdoor
unit
DO:
● choose a place as cool as possible.
● choose a place that is well ventilated.
● allow enough room around the unit for air intake/
exhaust and possible maintenance. (Fig. 2-3)
● Install the outdoor unit above
CAUTION
snowfall line.
● Do not place objects on or sit
on the outdoor unit. Also, never
block the air intake/outlet or
exhaust. Distortion of the
outdoor unit or incomplete
combustion may result.
● Do not introduce foreign matter
into the air intake/outlet or
exhaust. Do not poke them with
such objects as a stick.
● 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).
Air intake
Min. 6"
(15 cm)
Min. 6" (15 cm)
Air discharge
Fig. 2-2
Valve side
Min. 10"
(25 cm)
Min. 12"
(30 cm)
Fig. 2-3
1818_M_I
1817_C_I
Obstacle above
Min.
7 ft.
(2 m)
Air discharge
Ground
Min. 6 in.
(15 cm)
Air intake
Min.
7 ft.
(2 m)
Obstacle
1819_M_I
● use lug bolts or equal to bolt down unit, reducing
vibration and noise.
2-1. Baffle Plates for the Outdoor Unit
(CL×× models only)
NOTE
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)
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.
6
6" min
Air discharge
S4359128
Baffle
plate
Fig. 2-4
Fig. 2-5
Air discharge
6" min
Baffle
plate
1821_M_I
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
(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.
(2) Follow Fig. 3-2 and Table 3-1 to make the holes
in the ceiling.
Table 3-1 Unit : inch (mm)
Type
Length
AB
XS1852 (PNR-XS2432) 32-9/32 (820) 28-3/4 (730)
(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.
Hole-in-anchor
Hole-in-plug
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-1
A (ceiling opening dimension)
1/2"
1/2"1/2"
590 (suspension bolt pitch)
820 (ceiling opening dimension)
B (suspension bolt pitch)
Fig. 3-2
Concrete Insert
0038_T_I
1/2"
Refrigerant
tubing side
Drain hose
side
Unit: inch
0962_S_I
Refrigerant tubing joint (narrow tube side)
Refrigerant tubing joint (wide tube side)
Suspension lug
E
15/32" 15/32"
Power supply inlet
Table 3-2 Unit : inch
Type
Length
ABCDE
XS1852 (PNR-XS2432) 5-29/32 7-7/8 10-1/32 11-23/32 4-29/32
7
S4359128
Fig. 3-3
Drain inspection port
C
B
A
1019_X_I
D
3-3. Placing the Unit Inside the Ceiling
I
(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)
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.
(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.
(3) Thread the 2 hexagonal nuts and washers (field
supply) onto the 4 suspension bolts as shown in
Fig. 3-5.
Use 2 sets of nuts and washers (upper and
lower), so that the unit will not fall off the suspension lugs.
Full-scale installation diagram
(printed on a cardboard packing)
More than 2-3/8 inch
Nuts and washers
(2 sets)
1-7/8 inch
Full-scale installation
diagram
0963_X_I
Fig. 3-4
Suspension bolt
Suspension lug
Upper
Lower
(4) Remove the protective cardboard used to protect
the fan parts during transport.
(5) Adjust the distance between the unit and surface
of the ceiling (1-7/8 in.) using the supplied installation gauge. (Fig. 3-4)
0041_X_
Fig. 3-5
8
S4359128
3-4. Installing the Drain Piping
I
I
(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 drainage. (Fig. 3-6)
Tighten the hose clamps
CAUTION
so their locking nuts face
upward. (Fig. 3-6)
(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.
Transparent part for
checking drainage
Packing
(supplied)
Drain hose
(supplied)
Drain insulator (supplied)
Hose band
(supplied)
Fig. 3-6
Fig. 3-7
Hard PVC pipe
(not supplied)
Drain hose
adapter
(supplied)
0964_X_I
0197_X_I
● Do not install an air
CAUTION
bleeder tubes, as this
may cause water to spray
from the drain tube outlet.
(Fig. 3-8)
● 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. 3-9)
● 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)
● 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)
Air bleeder
0047_X_I
Fig. 3-8
5 in. or less (as short as possible)
10 in. or less
0965_X_I
Fig. 3-9
Upward gradient
0049_X_
Fig. 3-10
● Provide insulation for any drain pipes
that are installed indoors.
Support
pieces
0050_X_
Fig. 3-11
9
S4359128
3-5. Checking the Drainage
After wiring and piping are completed, use the following 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.
CAUTION
start turning when checking
the drainage.
(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,
Be careful since the fan will
CAUTION
use 5/16" (4 × 8 mm) tapping
screws. Do not use long
screws as they may puncture the drain pan and cause
water leakage.
5/16"(4 × 8 mm)
tapping screw
Tube cover
Siphon
0966_X_I
Fig. 3-12
10
S4359128
■ Ceiling Panel
Never touch or attempt to
CAUTION
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.
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)
(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)
(c) With the air-intake grille open about 45˚,
remove the safety string (hook on the grille
side). (Fig. 3-14)
(d) Pull the air-intake grille towards you to
remove it from the ceiling panel.
Latch
Screw
Air intake grille
(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
11
Fig. 3-14
0150_X_I
S4359128
3-7. Installing the Ceiling Panel
(1) Lift the ceiling panel and position it to align the
(5) Install the air filter and air-intake grille by perform-
panel hook with the panel catch of the indoor unit.
NOTE NOTE
The ceiling panel must be mounted in the correct
direction. Note that the 2 catches of the panel differ in
Rehook the safety string before closing the air-intake
grille.
size.
Confirm that the catches are correctly matched be-
3-8. When Removing the Ceiling Panel for
tween the ceiling panel and the indoor unit body.
(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
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.
point.
(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)
ing the steps in section 3-6 in reverse.
Servicing
Connector on unit
(inside electrical component box)
Ceiling panel
Clamp
Ceiling panel wiring
connector
Electrical
component box
Electrical component box
Connector of ceiling panel
Unit body
Panel catch (pull down)
Ceiling panel
Screws M5 with washer
Mark
Air filter
Fig. 3-15
12
Air-intake grille
0967_X_I
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.
Air-intake
chamber
CMB-GSJ80T
(XS1852)
High performance
filter
AFT-MSJ80T
AFT-HSJ80T
Super long-life
filter
AFT-LSJ80T
(2) ACCESSORIES
● Check that the following parts are in the box when unpacking.
NAME QT’Y REMARKS
Cord with socket
(9P)
Screw
(M5 × L125) (for fastening)
Screw
(M4 × L12) (for fastening)
Duct connection box 1 (for fresh air)
Duct connection flange 1
Connecting line. Connect only when
1
high-performance filter is used
Air-intake filter
4
Duct connection flange/ box
4+4
(for connecting fresh air duct
)
(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-
CAUTION
sory cord with socket” to
the electrical component box
when the unit is used to take
fresh air.
Do not connect the “accessory cord with socket” when
assembling the super longlife 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.
Cord with socket
(9P)
Electrical
component box
13
S4359128
1114_X_S
Fig. 3-16
(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)
(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)
(d) INSTALLING THE INDOOR UNIT
● Install the indoor unit to the ceiling.
(Install the indoor unit according to items 3-1 to 3-6.)
(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.
● Connect the 6P socket to the 6P plug from the
operation selector.
● Reattach the socket cover.
Installation screws
Air-intake chamber
3P socket
(from ceiling panel)
3P plug
(electrical
component box)
Indoor unit
Socket cover
(6P socket)
Operation
selector
6P plug
1115_X_S
Fig. 3-17
(f) INSTALLING THE HIGH-PERFORMANCE FILTER
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
drawing on the right can be installed into the
air-intake chamber.
● Turn the filter hook (positioned so the filter frame is
aligned) and secure the air filter in place.
Take adequate precautions
CAUTION
when installing onto the
ceiling. The air-intake chamber is especially prone to
rupture if struck on it’s side.
Arrow
Air filter
Ceiling panel
Installation screws
(M4 × 12)
connection box
Duct
Fig. 3-18
Installation screws
(M4 × 12)
Duct
connection
flange
Rectangular
hole
Filter hook
1113_X_S
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
4-1. Mounting on a 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.
(c) After confirming correct operation, use a
screwdriver to screw the supplied special
mounting screw into the wall. (Fig. 4-1)
(d) Hang the remote control unit from the
mounting screw.
Removable mounting
Wall
Special
mounting
screw
(Packed in indoor unit)
0532_M_I
Fig. 4-1
(2) Non-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.
(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.
(e) Remove the batteries of the remote control
unit.
(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.
Non-removable mounting
Wall
Screw
(Packed in indoor unit)
0533_M_I
Fig. 4-2
15
S4359128
■ Wired Remote Control Unit (Option)
(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.
Electrical
component box
Cover plate
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.
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)
(2) Align the cord with the groove of the remote
control unit.
(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.
(4) If local codes allow, the remote control unit cord
can be wired in the wall. (Fig. 4-5)
WIRED WIRELESS
R.C.U. Switch
Flat-head
tapping screw
25/64"(3 × 10 mm)
(SATA)
Cord clip
Remote
control
unit
Mounting
plate
Truss-head
tapping screw
5/8"(4 × 16 mm)
(TOTA)
Connector for the wired
remote control unit
Fig. 4-3
Cord
Rear
1006_M_I
Groove
Plastic
bushing
Ballpoint
pen
Remote
control
unit
Wall
16
S4359128
Fig. 4-4
1020_M_I
0531_M_I
Fig. 4-5
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.
5-1. Finding the Address Switches
Remote Control Unit
Remove the lid by sliding it off. You can see the
switches inside the battery compartment. (Fig. 5-1)
Indoor Unit
(1) Turn off the Power Switch.
(2) Remove the Grille.
(3) Remove the cover of the Electrical Component
Box.
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 independently.
Table 5-1
Remote Control Indoor Unit
Unit No. Address switch Address switch
Address switch is in “A” position
at time of shipment.
Fig. 5-1
A
B
Address
1008_M_I
12
1 A OFF OFF
2 BONON
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.
17
P.C.B
S4359128
WIRED WIRELESS
R.C.U. Switch
Fig. 5-2
ON
2
1
Address Switch
(DSW1)
1321_M_I
6. Electrical Wiring
6-1. 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.
(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.
(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.
(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.
(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.
(8) To prevent malfunction of the air conditioner
caused by electrical noise, care must be taken
when wiring as follows:
● The inter-unit control wiring and the remote control
wiring (option) should be wired apart from the interunit power wiring.
6-2. Recommended Wire Length and Wire Diameter for Power Supply System
Power Supply Terminal Base
(Outdoor Unit)
Capacity
Models
(A)*1 Power Supply
(B)*1 Inter-unit
AWG #12 AWG #12
Wiring
Time Delay
Fuse or
Circuit
Capacity
C1852, CL1852 75 ft. 65 ft. 15 A 20 A AWG #12
*1 Refer to the Wiring System Diagrams (See Fig. 6-3) for the meaning of “A”, “B”.
AWG = American Wire Gauge
Lock nut
Terminal
block
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
plate.
Conduit
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
Fig. 6-1
Max. Wire
Diameter
Access panel
1822_M_I
18
S4359128
NOTE
● Conduit's trade size for this unit is 1/2". The
conduit can be purchased at a hardware store.
● 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.
(5) Ground the unit in accordance with local codes.
(6) Be sure to size each wire allowing several inches
longer than the required length for wiring.
(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
refrigerant tubing, the
compressor or any
moving part.
INDOOR
INDOOR UNIT
1
2
3
G
Disconnect
switch
(Field supply)
CAUTION
(Inter-unit)
Power lines
230/208 V
230/208 V
230/208 V
Grounding
line
OUTDOOR UNIT
B
1
2
3
4
5
6
G
Fuse
A
L1
L2
Fig. 6-2
● 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.
Power supply line
Single-phase, 230/208 V
1823_M_I
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
● Short circuit will occur after approx.
Problem 2
● Air conditioner will not operate.
3 minutes and the power circuit
fuse blows.
Disconnect
(A)
switch
1
2
3
G G
Grounding line
Indoor unit Outdoor unit
1
2
3
1301_C_I
Disconnect
(B)
switch
1
2
3
G G
Grounding line
Indoor unit Outdoor unit
1
2
3
1302_C_I
Disconnect
(C)
switch
1
2
3
G G
Grounding line
Indoor unit Outdoor unit
1
2
3
1303_C_I
Problem 3
● Compressor will not start; only indoor unit will operate.
Disconnect
(D)
switch
1
2
3
G G
Grounding line
Indoor unit
1
2
3
Outdoor unit
1304_C_I
Disconnect
(E)
switch
1
2
3
G G
Grounding line
Indoor unit
1
2
3
Outdoor unit
1305_C_I
19
S4359128
Loose wiring may cause the
I
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 corresponding 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
■ 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)
(2) Using a screwdriver, remove the terminal
screw(s) on the terminal plate.
(3) Using the pliers, bend the solid wire to form a
loop suitable for the terminal screw.
(4) Shape the wire loop properly, position it on the
terminal plate and fix it securely with the terminal
screw using a screwdriver.
■ 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)
(2) Using a Pillips 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. 6-4)
(4) Place the ring pressure terminal, and replace and
tighten the removed terminal screw using a
screwdriver. (Fig. 6-5)
Special
washer
Wire
Solid wire
Strip 1 in.
Insulation
Stranded wire
Strip 3/8 in.
Screw
Ring pressure
terminal
Terminal plate
Fig. 6-3
Fig. 6-4
Wire
Fig. 6-5
Loop
1004_M_I
Ring
pressure
terminal
1106_M_I
Screw and
Special washer
Ring
connector
1308_M_
20
S4359128
7. How to Process Tubing
I
Flare nut
Copper
tubing
Flare tool
0128_M_I
Apply refrigerant
lubricant here and here
0129_M_I
The narrow tubing side is connected by flare nut, and
the wide tubing side is connected by brazing.
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
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)
NOTE
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.
(4) Make a flare at the end of copper tube with a flare
tool.* (Fig. 7-3)
*Use “RIGID®” or equivalent.
Deburring
Before After
Fig. 7-1
Copper
tubing
Reamer
0127_M_I
Fig. 7-2
0126_M_
NOTE
A good flare should have the following characteristics:
● inside surface is glossy and smooth.
● edge is smooth.
● tapered sides are of uniform length.
7-3. Precaution before Connecting Tubes Tightly
(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)
(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.
Fig. 7-3
Fig. 7-4
Union Flare nut
Fig. 7-5
0130_M_I
21
S4359128
7-4. Precautions during Brazing
● Replace air inside the tube with nitrogen gas to
prevent copper oxide film from forming during the
brazing process.
● Do not allow the tubing to get too hot during the
brazing process.
The nitrogen gas inside the tubing may overheat,
causing refrigerant system valves to become
damaged. Therefore allow the tubing to cool between brazings.
Indoor unit
Torque wrench
Fig. 7-6
Spanner
Outdoor unit
0131_C_I
7-5. Connecting Tubing between Indoor and
Outdoor Units
(1) Tightly connect the indoor side refrigerant tubing
with the outdoor side tubing. (Fig. 7-6)
(2)
To fasten the flare nuts, apply specified torque as:
Table 7-1
Tube Dia.
1/4" (6.35 mm)
5/8" (15.88 mm)
Tightening Torque
Approx. 140 — 180 kg-cm
(120 — 160 Ibs-in.)
Approx. 680 — 820 kg-cm
(590 — 710 lbs-in.)
7-6. Insulating the Refrigerant Tubing
Always insulate tubes after
CAUTION
completing leak tests on all
connection points.
Important
To avoid condensation and water leaks, the wide and
narrow tubes must be insulated with the supplied
insulation materials.
Taping the flare nuts
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)
Refrigerant tubing
Seal (supplied)
Unit side
insulator
Flare nut
Insulation tape (white)
(supplied)
Flare insulator (supplied)
Tube insulator
(not supplied)
Vinyl clamps (supplied)
Fig. 7-7
Refrigerant tubing and insulator
Drain insulator
and clamp.
Large
(supplied)
Packing
clamp.
Small
hose band
(supplied)
(not supplied)
Drain pipe and insulator
(not supplied)
Insulation
tape
Vinyl
Flare
clamp
insulator
Seal
0558_X_I
Never grasp the drain or refrigerant connecting
outlets when moving the unit.
1015_X_I
Insulation material
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
Fig. 7-8
S4359128
Tubing
Apply putty here
0137_C_I
I
Important
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").
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 condensation from overflowing the drain pan, keep
the drain hose separate from the refrigerant
tubing.
Thickness:
Min. 5/16 in.
Wide tube
Insulation
Thickness:
Min. 5/16 in.
Narrow tube
0999_C_I
(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)
(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.
7-8. 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. 7-10)
Insulated tubes
Fig. 7-9
Clamp
Drain hose
0136_M_
Fig. 7-10
23
S4359128
8. Air Purging
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
● 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.
(2) Using an adjustable wrench or box wrench, remove
the valve caps from the service valve on both narrow
and wide tubes.
(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)
Pressure
gauge
Indoor unit
Outdoor unit
Manifold valve
HiLo
Be sure to use a manifold valve
CAUTION
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.
(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:
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.
Vacuum pump
Fig. 8-1
1824_M_I
24
S4359128
(5) With the vacuum pump still running, close the “Lo”
knob of the manifold valve. Then stop the vacuum
pump.
(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)
Be sure to completely insert
CAUTION
the hex wrench before
attempting to turn the 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.
(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.
90° (1/4 turn)
Valve cap
Vacuum hose to manifold valve
Narrow tube
Fig. 8-2
Hex wrench
Wide tube
1825_M_I
(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
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)
(2) Set the Operation Selector to the “Test” position.
The air conditioner will start running.
(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.
Air filter
TESTOFF ON
Fig. 9-1
Operation
selector
Air intake grille
1323_M_I
Important
Set the Operation Selector at the “ON” position. Otherwise the unit will stop or will not run correctly.
9-2. Performing Test Run with Optional Wired
Remote Control Unit
(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)
(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.
(4) Let the unit run for about 30 minutes and check that
it operates normally.
(5) Press the ON / OFF operation button again to stop
the unit.
RUN
TEST
RUN
(Bottom)
Remote control unit
viewed from rear
Fig. 9-2
Service TEST RUN
switch
0543_M_I
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
Valve cap
Stem
O-ring
1827_M_I
The basic function of the service valves are given in Table 7 below.
Action
Shipping
Operating and
test running the
air conditioner
Measuring
pressure
and gas charging
Air purging with a
vacuum pump
Narrow Tube Service Wide Tube Service
Valve (2-Way) Valve (3-Way)
1826_M_I
1828_M_I
1829_M_I
∗
1830_M_I
1831_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)
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
Pump Down Procedure
Be sure to carry out pump down with the unit in
cooling mode.
(1) Connect the Lo side charging hose of the manifold
valve to the service port on the wide tube service
valve.
(2) Using a hex wrench, turn the narrow tube service
1833_M_I
Service valve
Hose with push-pin
PUSH
1834_M_I
Fig. 9-3
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.
(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.
(5) Disconnect all gauges and hose, and replace the
bonnets and the valve caps as they were before.
27
S4359128
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