Outdoor temperature : 109°F DB/ 65°F WB
Room temperature: 71°F WB/ 80°F DB
Minimum Conditions
Outdoor temperature : 0°F* DB/ 5°F WB
Room temperature: 57°F WB/ 59°F DB
* When air discharge chamber is installed.
Units should be installed by licensed contractor according to
local code requirements.
SANYO FISHER COMPANYIn Canada
A DIVISION OF SANYO NORTH SANYO Canada Inc.
AMERICA CORPORATION300 Applewood Crescent
21605 Plummer StreetConcord, Ontario
Chatsworth, CA 91311 U.S.A.L4K 5C7, Canada
TRC
SC
Page 2
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
WARNING
CAUTION
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
WARNING
• 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 Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED ELECTRICIAN
SHOULD ATTEMPT TO WIRE THIS SYSTEM.
unsafe practice which can result
in severe personal injury or death.
This symbol refers to a hazard or
unsafe practice which can result
in personal injury or product or
property damage.
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
• Ventilate the room well, in the event that is refrigerant
gas leaks during the installation. Be careful not to allow
contact of the refrigerant gas with a flame as this will
cause the generation of poisonous gas.
• 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.
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.
CAUTION
• Ventilate any enclosed areas when installing or testing
the refrigeration system. Escaped refrigerant gas, on
contact with fire or heat, can produce dangerously toxic
gas.
• Confirm after installation that no refrigerant gas is leaking. If the gas comes in contact with a burning stove, gas
water heater, electric room heater or other heat source,
it can cause the generation of poisonous gas.
2
Page 3
Check of Density Limit
The room in which the air conditioner is to be
installed requires a design that in the event of
refrigerant gas leaking out, its density will not
exceed a set limit.
The refrigerant (R410A), which is used in the air conditioner, is safe, without the toxicity or combustibility of
ammonia, and is not restricted by laws imposed to protect the ozone layer. However, since it contains more
than air, it poses the risk of suffocation if its density
should rise excessively. Suffocation from leakage of
refrigerant is almost non-existent. With the recent
increase in the number of high density buildings, however, the installation of multi air conditioner systems is
on the increase because of the need for effective use
of floor space, individual control, energy conservation
by curtailing heat and carrying power, etc.
Most importantly, the multi air conditioner system is
able to replenish a large amount of refrigerant compared to conventional individual air conditioners. If a
single unit of the multi air conditioner system is to be
installed in a small room, select a suitable model and
installation procedure so that if the refrigerant accidentally leaks out, its density does not reach the limit
(and in the event of an emergency, measures can be
made before injury can occur).
In a room where the density may exceed the limit,
create an opening with adjacent rooms, or install
mechanical ventilation combined with a gas leak
detection device. The density is as given below.
2. The standards for minimum room volume are as
follows.
(1) No partition (shaded portion)
(2) When there is an effective opening with the adja-
cent room for ventilation of leaking refrigerant gas
(opening without a door, or an opening 0.15% or
larger than the respective floor spaces at the top
or bottom of the door).
Outdoor unit
Refrigerant tubing
Indoor unit
(3) If an indoor unit is installed in each partitioned
room and the refrigerant tubing is interconnected,
the smallest room of course becomes the object.
But when mechanical ventilation is installed interlocked with a gas leakage detector in the smallest
room where the density limit is exceeded, the volume of the next smallest room becomes the object.
Refrigerant tubing
Total amount of refrigerant (oz.)
Min. volume of the indoor unit installed room (ft.3)
< Density limit (oz./ft.
3
)
The density limit of refrigerant which is used in multi air conditioners is 0.3 oz./ft.
3
(ISO 5149).
NOTE
1. If there are 2 or more refrigerating systems in a single refrigerating device, the amount of refrigerant
should be as charged in each independent device.
For the amount of charge in this example:
Outdoor unit
e.g., charged
amount (22 lbs.)
Indoor unit
Room A Room B Room C Room D Room E Room F
The possible amount of leaked refrigerant gas in rooms
A, B and C is 22 lbs.
The possible amount of leaked refrigerant gas in rooms
D, E and F is 33 lbs.
e.g., charged
amount (33 lbs.)
Outdoor unit
Very
small
room
Small
room
Mechanical ventilation device – Gas leak detector
Medium
room
Large room
Indoor unit
3. The minimum indoor floor space compared with the
amount of refrigerant is roughly as follows (when
the ceiling is 9 ft. high):
430
3
ft.
Min. indoor floor space
3
Range below the
376
density limit
of 0.3 oz./ft.
323
(countermeasures
not needed)
269
215
161
108
54
0
3
Range above
the density limit
of 0.3 oz./ft.
(countermeasures
needed)
224466
Total amount of refrigerant
3
lbs.
Page 4
Precautions for Installation Using New Refrigerant
1. Care regarding tubing
1-1. Process tubing
Material: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seam-
less Pipes and Tubes.”
Tubing size: Be sure to use the sizes indicated in the table below.
Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution
joints (optional).
When bending tubing ø5/8" or smaller, use a bending radius that is 4 times the outer diameter of the tubing or larger.
Use sufficient care in handling the tubing. Seal the tubing ends with
CAUTION
MaterialO
Copper tube
Outer diameter1/43/81/25/8
Wall thickness1/321/321/325/128
1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A
refrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating
machine oil, the prevention of water and other impurities becomes more important than ever.
caps or tape to prevent dirt, moisture, or other foreign substances
from entering. These substances can result in system malfunction.
Unit: inch
2. Be sure to recharge the refrigerant only in liquid form.
2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause
defects of the unit.
2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining
refrigerant and recharge the required total amount of new refrigerant after fixing the leak.
3. Different tools required
3-1. Tool specifications have been changed due to the characteristics of R410A.
Some tools for R22- and R407C-type refrigerant systems cannot be used.
R407C tools
Itemcompatible Remarks
Manifold gauge Yes No Types of refrigerant, refrigerating machine oil, and
Charge hose Yes No To resist higher pressure, material must be changed.
Vacuum pump Yes YesUse a conventional vacuum pump if it is equipped
Leak detector Yes No Leak detectors for CFC and HCFC that
Flaring oil Yes No For systems that use R22, apply mineral oil (Suniso oil)
New
tool?
with R410A?
pressure gauge are different.
with a check valve. If it has no check valve,
purchase and attach a vacuum pump adapter.
react to chlorine do not function because
R410A contains no chlorine. Leak detector
for HFC134a can be used for R410A.
to the flare nuts on the tubing to prevent refrigerant
leakage. For machines that use R407C or R410A, apply
synthetic oil (ether oil) to the flare nuts.
Manifold gauge
Vacuum pump
Outlet
Inlet
* Using tools for R22 and R407C and new tools for R410A together can cause defects.
4
Page 5
3-2. Use R410A exclusive cylinder only.
When charging with a refrigerant cylinder, use an
electronic scale for charging refrigerant. In this
case, if the volume of refrigerant in the cylinder
becomes less than 20% of the fully-charged
amount, the composition of the refrigerant starts
to change. Thus, do not use the refrigerant if the
amount in the charging cylinder is less than 20%.
Also, charge the minimum necessary amount to
the charging cylinder before using it to charge the
air conditioning unit.
Configuration and characteristics of cylinders
Valve
Liquid
Single valve
Charge liquid refrigerant with
cylinder inup-side-down position.
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied with Outdoor Unit
1-3. Type of Copper Tube and Insulation Material
1-4. Additional Materials Required for Installation
1-5. Tubing Size
2. SELECTING THE INSTALLATION SITE . . . . 16
2-1. Indoor Unit
2-2. Outdoor Unit
2-3. Air-Discharge Chamber for Top Discharge
2-4. Installing the Unit in Heavy Snow Areas
2-5. Precautions for Installation in Heavy Snow
Areas
2-6. Dimensions of Wind Ducting
2-7. Dimensions of Snow Ducting
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
3-6. Before Installing the Ceiling Panel
3-7. Installing the Ceiling Panel
3-8. When Removing the Ceiling Panel
3-10. Removing the Wall Fixture from the Unit
3-11. Selecting and Making a Hole
3-12. Installing the Rear Panel on the Wall
3-13. Removing the Grille to Install the Indoor Unit
3-14. Preparing the Indoor Side Tubing
3-15. Wiring Instructions
3-16. Wiring Instructions for Inter-Unit Connections
3-17. Shaping the Tubing
3-18. Installing the Drain Hose
5-1. General Precautions on Wiring
5-2. Recommended Wire Length and Wire
Diameter for Power Supply System
5-3. Wiring System Diagrams
5-4. How to Connect Wiring to the Terminal
6. HOW TO INSTALL THE WIRED REMOTE
CONTROLLER (OPTIONAL PART) . . . . . . . . 60
6-1. Installation Site Selection
6-2. Wired Remote Controller Installation
6-3. Basic Wiring Diagram
6-4. Wiring System Diagram for Group Control
6-5. Wiring System Diagram for Multiple Remote
Controllers
6-6. How to Switch the Indoor Temperature Sensor
6-7. Trouble Diagnostics
7. HOW TO INSTALL THE WIRELESS REMOTE
CONTROLLER (OPTIONAL PART) . . . . . . . . 68
7-1. Wireless Remote Controller Installation
7-2. Room Temperature Sensor Setting
7-3. Address Switches
7-4. Setting the Model Code
7-7. Indicator Section Installation
7-8. Operating Controller Installation
7-9. Electrical Wiring
7-10. Test Run Switch
7-11. Misoperation Alarm Indicators
6
Page 7
Page
<RCS-BH80UA.WL>
7-12. Separate Type Signal Receiving Unit Installation
7-13. Electrical Wiring
7-14. Test Run Switch
7-15. Misoperation Alarm Indicators
7-16. Basic Wiring Diagram
7-17. Wiring System Diagram for Group Control
7-18. Wiring System Diagram for Multiple Remote Controllers
<RCS-SH1UA>
7-19. Test Run Procedure
7-20. Check Items Before the Test Run
7-21. Preparing for the Test Run
7-22. Precautions
8-1.System Controller Installation
8-2.Electrical Wiring
8-3.Address Switch Setting
8-4.Mode Setting
8-5.How to Perform Zone Registration
8-6.Connection with Other Equipment
8-7.Memory Back Up Switch
8-8.Test Run
9. HOW TO PROCESS TUBING . . . . . . . . . . . . 96
9-1. Connecting the Refrigerant Tubing
9-2. Connecting Tubing between Indoor and
Outdoor Units
9-3. Insulating the Refrigerant Tubing
9-4. Taping the Tubes
9-5. Finishing the Installation
10. LEAK TEST, EVACUATION AND ADDITIONAL
REFRIGERANT CHARGE . . . . . . . . . . . . .100
10-1. Leak Test
10-2. Evacuation
10-3. Charging Additional Refrigerant
10-4. Finishing the Job
11-1. Preparing for Test Run
11-2. Caution
11-3. Test Run Procedure
11-4. Items to Check Before the Test Run
11-5. Test Run Using the Remote Controller
11-6. Precautions
11-7. Table of Self-Diagnostic Functions and Corrections
(X, T, U, K Type)
11-8. Examples of Wiring Diagrams
7
Page 8
1. GENERAL
1-3. Type of Copper Tube and Insulation Material
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)
1-2. Accessories Supplied with Outdoor Unit
See Tables 1-1 to 1-9.
TableType
1-14-Way Air Discharge Semi-Concealed
1-2Wall-Mounted
1-3Ceiling-Mounted
1-4Concealed-Duct
1-5Outdoor Unit
1-6Wired Remote Controller
1-7Wireless Remote Controller
1-8Timer Remote Controller
1-9System Controller
Copper tubing for connecting the outdoor unit to the
indoor unit is available in kits which contain the liquid
and gas tubing, fittings and insulation. Consult your
nearest sales outlet or A/C workshop.
If you wish to purchase these materials separately
from a local source, you will need:
1. Deoxidized annealed copper tube for refrigerant
tubing.
2. Foamed polyethylene insulation for copper tubes
as required to precise length of tubing.
Wall thickness of the insulation should be not less
than 5/16 in.
3. Use insulated copper wire for field wiring. Wire size
varies with the total length of wiring. Refer to
Section 5. “Electrical Wiring” for details.
CAUTION
Check local electrical codes
and regulations before
obtaining wire. Also, check
any specified instructions
or limitations.
1-4. Additional Materials Required for Installation
1. Refrigeration (armored) tape
2. Insulated staples or clamps for connecting wire
(See your local codes.)
3. Putty
4. Refrigeration tubing lubricant
5. Clamps or saddles to secure refrigerant tubing
6. Scale for weighing
8
Page 9
Table 1-1 XH (4-Way Air Discharge Semi-Concealed)
Part NameFigure
Full-scale installation diagram1
Flare insulator2
Washer8
Insulating tape1
(White)
Hose band2
Packing1
Drain insulator1
Drain hose1
Drain hose adaptor1
Sealing putty1
Tube connector1
Table 1-2KH (Wall-Mounted)
‘Q’ty
Wall fixture
Part NameFigureRemarks
*1
Qʼty
Remarks
For determining suspension bolt pitch
For gas and liquid tubes
For suspending indoor unit from ceiling
For gas tube flare nuts
For securing drain hose
For drain joint
For drain joint
For drain outlet
For sealing recessed portion of power supply
For sizing up of liquid tube from 1/4 in. to 3/8 in.
(only for 24 type)
For supporting the indoor unit
1
Insulator
Mounting plate
Tappingscrew
*1
*1
*1
Full-scale diagram
Wall fixture
Rawl plug
Cover
Tappingscrew
*2
*2
*2
*2
Insulator
Tube connector
Truss-head
Phillips
4 × 1 in.
Truss-head
Phillips
4× 5/8 in.
1
For insulation of the tubing of the indoor unit
For securing the indoor unit
1
For fixing the wall fixture
20
For determining the place where the indoor unit is
1
installed
1
For supporting the indoor unit
10
For fixing the wall fixture
1
For improved tubing appearance
10
For fixing the wall fixture
1
For insulation of the tubing of the indoor unit
For sizing up of liquid tube from 1/4 in. to 3/8 in.
1
(only for 24 type)
L shape tube connector
*1
KH3672R
*
2
KH3072R
KH3672R
*
3
KH3072R
KH3672R
*3
Simplifies on-site tubing work
1
9
Page 10
Table 1-3TH (Ceiling-Mounted)
T3
‘Q’ty
For temporarily suspending indoor unit
4
from ceiling
For drain hose joint
1 Set
For gas tube joints
Part NameFigureRemarks
Special washer
Drain insulator1
Flare insulator
T5
Drain hose adaptor1
Drain hose clamp4
Insulating tape
Black
White
(heat-resisting)
Vinyl clamp2
Full-scale installation
diagram
Sealing putty1
For gas tube and drain hose joint
2
For gas flare joints
1
For ends of flare insulator
For determiningsuspension
1
bolt pitch
For sealing recessed portion of power supply
Drain hose1
Tube connector1
For sizingup of liquid tube from 1/4 in. to 3/8 in.
(only for 24 type)
Table1-4 UH (Concealed-Duct)
Part NameFigure
‘Q’ty
Remarks
Flare insulator2
(Black)
2
For gas and liquid tubes
For gas and liquid tubes
Insulating tape
(White)
Tappingscrew TOTA4-10
2
14 or 20 or 24
Jumper cable*1
Hose band1
Packing1
Sealing putty1
Drain insulator1
For gas and liquid tube flare nuts
For air intake duct connection
For increasing the fanspeed
For securing drain hose
For drain joint
For sealing recessed portion of power supply
For drain joint
Drain hose1
Drain hose adaptor1
Clamp9
Tube connector1
For securing drain hose & refrigerant tubing
For sizingup of liquid tube from 1/4 in. to 3/8 in.
(only for 24 type)
* Jumper cable is housed inside the electrical component box.
Table 1-5 (Accessories for the Wired Remote Controller)
Part NameFigure
‘Q’ty
Part NameFigure
‘Q’ty
Wired remote controller
(comes with 7-7/8 in. wire)
Machine screws
M4 × 1 in.
Wood screws2
1Spacers2
2Wire joints4
10
Page 11
Table 1-6 (Accessories for the Wireless Remote Controller)
<RCS-SH80UA.WL>
Part NameFigure
‘Q’ty
Part NameFigure
‘Q’ty
Operation controller1Spacers2
Run Timer
Indicator section14
Heating preparations
Wireless remote controller12
Wireless remote controller
mounting cradle
Pan-head tapping screws
4× 13/32 in.
Tr uss-head tapping screws
4 × 5/8 in.
Vinyl clamps
13
L 5-29/32
Batteries2Wire joints4
<RCS-SH1UA>
Part NameFigurePart NameFigure
Wireless remote controller12
‘Q’ty‘Q’ty
Tr uss-head tapping screws
4 × 5/8 in.
Wireless remote controller
12
Batteries
mounting cradle
<RCS-BH80UA.WL>
Part NameFigure
Separate type signal receivingunit
(comes with 7-7/8 in. wire)
‘Q’ty
Small screws
12
M4 × 1-9/16 in.
Part NameFigure
Carrier for ceiling installation1Wood screws2
Wireless remote controller1Spacers4
Wireless remote controller
1Wire joints4
mounting cradle
Batteries2Clamp
Machine screws
M4 × 1 in.
Ceiling installation paper pattern
21
(
3-3/4 × 2-1/32 in.
)
‘Q’ty
1
11
Page 12
Table 1-7 (Accessories for the Timer Remote Controller)
Part NameFigure
Timer Remote Controller
Connecting wiring
length 4 ft.
Machine screws
‘Q’ty
Part NameFigure
1Wood screws
1Spacers2
2Clamps
M4 × 1 in.
Table 1-8 (Accessories for the System Controller)
Part NameFigure
System controller11
Rubber bushing
(7/8 in.)
Screws for fixture
(1-3/16 in.)
‘Q’ty
Label
(Identification label)
Label
41
(Terminal base label)
Part NameFigure
SYSTEM CONTROLLER IDENTIFICATION LABEL
ALL Central Control ALL RCU.
ZONE1 Central Control
ZONE1 RCU.
ZONE2 RCU.
ZONE2 Central Control
ZONE3 Central Control
ZONE3 RCU.
ZONE4 Central Control
ZONE4 RCU.
*Please attach this label on surface of the lid after cleaning.
*If need to write down some detail, use magic marker.
ALL ON
U1
INPUT
Inter-
unit
control
wiring
ALL OFF
U2
INPUT
COMMON
U2 Aux.
INPUT
OPERATION
STATE
UNUSED
OUTPUT
ALARM
OUTPUT
DC12V
FROM
INDOOR
UNIT PCB.
COMMON
OUTPUT
2
‘Q’ty
2
2
‘Q’ty
12
Page 13
1-5. Tubing Size
Single type
Refrigerant tubing between the indoor and outdoor units
should be kept as short as possible.
The length of the refrigerant tubes between the indoor
and outdoor units are limited by the elevation difference
between the 2 units. During tubing work, try to make both
the tubing length (L) and the difference in elevation (H1)
as short as possible. Refer to Table 1-10.
No additional charge of compressor oil isnecessary.
1
*
If total tubing length becomes 100 to 165 ft., charge additional refrigerant by 0.43 oz./ft.
Table 1-11 List of Connection Tube Sizes
Main tubing (L)
Type capacity of indoor units
Gas tube
Liquid tube
Amount of additional charge per 1 ft.
26 – 48
ø5/8"
ø3/8"
0.43 oz.
14
Page 15
CAUTION
1. This unit requires no additional refrigerant charge up to 100 ft. tubing length.
In case of more than 100 ft., additional
refrigerant charge is required. Refer to
Tables 1-11 and 1-12.
2. In case of multi type installation,
indoor units should be installed within
the same room. If multi type indoor
units are installed in different rooms,
temperature control may develop problems because thermostat operation
must follow the thermostat condition of
1 indoor unit only (the main unit).
WARNING
Always check the gas density
for the room in which the unit is
installed.
Check of limit density
When installing an air conditioner in a room, it is necessary to ensure that even if the refrigerant gas accidentally escapes, its density does not exceed the limit level.
If the density might exceed the limit level, it is necessary to set up an opening between it and the adjacent
room, or to install mechanical ventilation which is interlocked with the leak detector.
(Total refrigerant charged amount: oz.)
(Min indoor volume where the indoor unit is installed: ft.3)
<
Limit density 0.3 (oz./ft.3)
The limit density of refrigerant which is used in this unit
3
is 0.3 oz./ft.
(ISO 5149).
The shipped outdoor unit comes charged with the
amount of refrigerant fixed for each type; so add it to
the amount that is charged at the field. (For the refrigerant charge amount at shipment, refer to the unit’s
nameplate.)
Minimum indoor volume & floor area relative to
the amount of refrigerant is roughly as given in
the following table.
2
ft.
538
484
430
376
323
269
215
161
Min. indoor floor area
(when the ceiling is 9 ft. high)
108
54
3
ft.
4,842
4,356
3,870
3,384
2,907
2,421
1,935
1,449
Min. indoor volume
Range below the
density limit of
0.3 oz./ft.
(Countermeasures
not needed)
972
486
22
Total amount of refrigerant
3
Range above the
density limit of
0.3 oz./ft.
(Countermeasures
needed)
446688 lbs.
3
15
CAUTION
Pay special attention to any
location, such as a basement
or recessed area, etc. where
leaked refrigerant can collect,
since refrigerant gas is heavier than air.
Page 16
2. SELECTING THE INSTALLATION SITE
Ceiling-Mounted Type
2-1. Indoor Unit
AVOID:
areas where leakage of flammable gas may be
expected.
places where large amounts of oil mist exist.
direct sunlight.
locations near inverter lamps which may affect the
performance of the unit.
locations near heat sources which may affect the
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 controller will be splashed
with water or affected by dampness or humidity.
installing the remote controller 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.
Ceiling
Wall
Min. 10 inch
Front view
Min. 10 inch
NOTE
The rear of the indoor unit can be installed flush
against the wall.
Air
discharge
Min. 2 ft.
Ceiling
Air intake
Side view
4-Way Air Discharge Type
Concealed-Duct Type
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.
install the unit within the maximum elevation
difference above or below the outdoor unit and within
a total tubing length (L) from the outdoor unit as
detailed in Table 1-11.
allow room for mounting the remote controller about
3 ft. off the floor, in an area that is not in direct
sunlight nor in the flow of cool air from the indoor
unit.
NOTE
Air delivery will be degraded if the distance from the
floor to the ceiling is greater than 10 ft.
3 ft.
Min.
6 inch
3 ft.
3 ft.
3 ft.
3 ft.
Wall-Mounted Type
Min.
6 inch
Min.
12 inch
16
Page 17
2-2. Outdoor Unit
AVOID:
heat sources, exhaust fans, etc. (Fig. 2-1)
damp, humid or uneven locations
DO:
choose a place as cool as possible.
choose a place that is well ventilated and outside
air temperature does not exceed maximum 115°F
constantly.
allow enough room around the unit for air intake/
exhaust and possible maintenance. (Fig. 2-2)
use lug bolts or equal to bolt down unit, reducing
vibration and noise.
if cooling operation is to be used when the outdoor
air temperature is 23°F or below, install a duct on
the outdoor unit.
Installation space
Distance between obstructions and the unit air inlet
and outlet must be as shown below.
*3
More than 25/64"
Inlet side C
Outlet side
More than
3.3 ft.
More than 25/64"
*4*2
Hot air
Air direction chamber
(field supply)
Outdoor
unit
Fig. 2-1
(Obstruction above unit)
*1
Exhaust fan
Heat source
B
A
Inlet side
More than 8"
(Obstruction on
inlet side)
*1
Fig. 2-2
CAUTION
Concerning inlet-side distance “C” (Fig. 2-2)
The minimum for distance “C” is 6" if there are no obstructions on the outlet side
(wall *1 side) and *2 or *4 is not present. In all other cases, the minimum for distance
“C” is 8".
If the unit is installed with the outlet side facing wall *1, then there must be no obstruc-
tions on 2 of the remaining 3 sides: *2, *3, *4.
If wall *1 is on the outlet side (Fig. 2-2), or if obstructions are present on all 3 sides *2,
*3, and *4 (Fig. 2-2), then the minimum distance for “A” and “B” is 80" (Fig. 2-3). Even
if there is no wall on the outlet side, a minimum of 3.3 ft. is required.
Installation requirements
provide a solid base (concrete block, 4" × 16"
beams or equal), a minimum of 6" above ground
level to reduce humidity and protect the unit against
possible water damage and decreased service life.
(Fig. 2-4)
use lug bolts or equal to bolt down unit, reducing
vibration and noise.
(Ground)
Fig. 2-3
Anchor bolts
(4 pieces)
17
Fig. 2-4
Page 18
2-3. Air-Discharge Chamber for Top Discharge
Be sure to install an air discharge chamber in the
field when:
it is difficult to keep a space of min. 20" between
the air discharge outlet and an obstacle.
the air discharge outlet is facing a sidewalk and
discharged hot air may bother passers-by.
Refer to Fig. 2-5.
2-4. Installing the Unit in Heavy Snow Areas
In locations with strong wind, snow-proof ducting
should be fitted and direct exposure to the wind
should be avoided as much as possible.
Countermeasures against snow and wind
In regions with snow and strong wind, the following
problems may occur when the outdoor unit is not provided with a platform and snow-proof ducting:
a) The outdoor fan may not run and damage to the
unit may occur.
b) There may be no air flow.
c) The tubing may freeze and burst.
d) The condenser pressure may drop because of
strong wind, and the indoor unit may freeze.
Air discharge
Air discharge
Fig. 2-5
In regions with significant snowfall, the outdoor unit should
be provided with a platform and snow-proof duct.
2-5. Precautions for Installation in Heavy Snow
Areas
(1) The platform should be higher than the max. snow
depth. (Fig. 2-6)
(2) The 2 anchoring feet of the outdoor unit should be
used for the platform, and the platform should be
installed beneath the air intake side of outdoor
unit.
(3) The platform foundation must be firm and the unit
must be secured with anchor bolts.
(4) In case of installation on a roof subject to strong
wind, countermeasures must be taken to prevent
the unit from being blown over.
Without snowproof ducting
(Low platform)
Fig. 2-6
Outdoor
Unit
Duct
Air
Intake
With snowproof ducting
(High platform)
Fig. 2-7
18
Page 19
2-6. Dimensions of Wind Ducting
Reference diagram for air-discharge chamber (field supply)
STK–DRV80U for 2672R / 3072R / 3672R unit
1 Air discharge chamber
2 Air discharge chamber (base)
3-ø5/32 hole
2
1
2
Note: In snowy regions, if there is concern that snow may enter the air discharge
STK-DRE140A for 4872R unit
9-27/32
21-13/16
21-13/16
6-ø15/64 hole
22-7/16
23-15/32
21-39/64
5-3/16
9-27/329-27/32
1-1/16
15/16 17/32
(25/32)
(25/32)
Rectangular hole
(both sides)
5-5/32
chamber, remove the base of the chamber (10 screws) before using.
(25/32)(25/32)
Unit: inch
1 Unit front, air discharge chamber
2 Unit left side, air discharge chamber
3 Unit light side, air discharge chamber
4 Reinforcement brackets, 4 locations
9-7/161-1/8
Rectangular
hole
Rectangular
hole
2
1-3/821-5/3212-15/32
2-3/4
11-13/16
1
22-13/32
21-13/3211
4
3
9-27/32
9-27/32
12-7/329-27/32
39-1/4
42-29/32
9-7/16
Rectangular
hole
Rectangular
hole
19
1-1/8
12-15/3221-5/32
Unit: inch
1-3/8
2-3/4
Page 20
Dimensions of Outdoor Unit with air-discharge chamber (field supply)
2672R / 3072R / 3672R unit with STK-DRV80U
4-5/16
13/32
14-31/32
15-15/16
Wind
direction
13-3/8
6-11/16
25-31/32
1/21/2
Wind direction
2-17/32
30-23/32
Wind direction
23/32
21-13/16
Wind direction
4872R unit with STK-DRE140A
1/21/2
Wind
direction
13-3/8
37
25-31/326-11/16
Wind direction
1/2
Wind direction
4-5/16
25/3225/32
25/3225/32
19/32
21-5/84-1/16
14-31/3213/3219/32
9-27/32
Wind direction
5-3/16
Unit: inch
15-15/16
2-11/3621-13/32
37
Wind
direction
48-7/16
Wind
direction
23/32
11-13/16
Wind
direction
Wind
direction
1/2
20
4-1/439-1/4
11- 13/ 16
Wind direction
Wind direction
Unit: inch
Page 21
Reference diagram for air-discharge chamber (field supply)
If the air discharge chamber is used, the space shown below must be secured around the outdoor unit.
If the unit is used without the required space, a protective device may activate, preventing the unit from operating.
(1) Single-unit installation
Min. 7-7/8
Min. 39-3/8
Unit: inch
CAUTION
The top and both sides must remain open. If there are obstacles to the front and rear of
the outdoor unit, the obstacle at either the front or rear must be no taller than the height of
the outdoor unit.
(2) Multiple-unit installation
Installation in lateral rows
CAUTION
The front and top must remain open.
The obstacles must be no taller than the height of the outdoor unit.
Installation in front-rear rows
Installation with intakes facing outletsInstallation with intakes facing
Unit: inch
intakes or outlets facing outlets
More than 59-1/16
CAUTION
The front and both sides must remain open.
More than 15-3/4
More than 78-3/4
Unit: inch
21
Page 22
2-7. Dimensions of Snow Ducting
Reference diagram for snow-proof vents (field supply)
STK-BDRE80A for 2672R / 3072R / 3672R unit
1 Unit top, snow-proof vent
2 Unit left side
3 Unit right side
4 Unit reverse side
5 Unit reverse side
6 Unit sides, reinforcement brackets for snow-proof vent
Fastened by screws at 13 locations
25-13/32
17-15/32
9-3/16
16-25/32
27-29/32
Fastened by screws at 3 locations
(also on reverse side)
Unit anchor hole
Fastened by screw at 1
location (also on reverse side)
(6 – ø7 hole)
STK-BDR140U for 4872R unit
5-3/32
19-11/16
1-21/32
25/32
3-3/4
5
30-3/32
19-11/16
28-3/4
30-11/16
4
1
11-29/32
3-31/32
9-3/8
6
13-25/32
5/8
9-3/16
16-25/32
27-29/32
2
Unit: inch
1 Unit top, snow-proof vent
2 Unit left side
3 Unit right side
4 Unit reverse side
5 Unit reverse side
6 Unit sides, reinforcement brackets for snow-proof vent
3
9-3/16
28-13/16
47-19/32
Fastened by screws at
3 locations (also on reverse side)
25-13/32
17-15/32
Fastened by screws at 13 locations
3-3/419-11/16
25-32
5-29/32
17-23/3219-11/16
30-3/32
Unit anchor hole
(7 – ø7 hole)
13-5/1619-11/16
5/8
4
1
11-7/8
3-31/32
2
9-3/16
28-13/16
47-19/32
Fastened by screw at
1 location (also on reverse side)
15-9/32
1-5/828-3/4
30-5/8
22
1-13/16
Unit: inch
Page 23
Dimensions of outdoor unit with snow-proof vents (field supply)
2672R / 3072R / 3672R unit with STK-BDRE80A
Wind direction
25-13/32
Wind directionWind direction
30-23/32
30-3/32
Wind direction
37
7-1/16
25/32
14-31/3213/3219/32
3/4
Wind direction
15-15/16
11-29/32
Wind direction
16-3/4
4872R unit with STK-BDR140U
Wind direction
25-13/32
Wind direction
48-7/16
47-19/37
30-3/32
24-7/8
Wind direction
Wind direction
37
7-1/16
25/3225/32
14-31/3213/3219/32
15-15/16
Wind direction
Unit: inch
11-29/32
28-13/16
Wind direction
Unit: inch
23
Page 24
Reference diagram for snow-proof vents – 1
Space requirements for setting – (1)
C(H)2672R / 3072R / 3672R / 4872R with STK-BDRE80A & STK-BDR140U
[Obstacle to the rear of unit]
[Obstacle to the front of unit]
Top is open:Top is open:
(1) Single-unit installation
(2) Obstacles on both sides
Min. A
Min. B
Min. C
(1) Single-unit installation
Min. D
(2) Multiple-unit installation (2 or more units)
(3) Multiple-unit installation (2 or more units)
Min. G
Min. EM in. E
Note:
In cases 2 and 3 the
height of the obstacle
must be no taller than
the height of the
outdoor unit.
Outdoor unit
C(H)2672R / 3072R /
3672R / 4872R
Top is blocked by an obstacle:
Outdoor unit
A
B
C
D
E
F
G
Min. E
Min. F
C(H)2672R / 3072R /
3672R / 4872R
5-29/32
5-29/32
11-13/16
7-7/8
11-13/16
5-29/32
7-7/8
Min. IMin. I
H
19-11/16
Min. H
Min. J
I
11-13/16J39-3/8
Top is blocked by an obstacle:
Min. L
Min. K
Outdoor unit
C(H)2672R / 3072R /
3672R / 4872R
L
19-11/16
5-29/32
Min. M
Outdoor unit
C(H)2672R / 3072R /
3672R / 4872R
K
M
39-3/8
Min. N
N
39-3/8
Unit: inch
24
Page 25
Reference diagram for snow-proof vents – 2
Space requirements for setting – (2)
C(H)2672R / 3072R / 3672R / 4872R with STK-BDRE80A & STK-BDR140U
[Obstacles to the front and rear of unit]
The top and both sides must remain open. Either the obstacle to the front or
the obstacle to the rear must be no taller than the height of the outdoor unit.
(1) Single-unit installation
Q
Min. P
Dimension Q
If a snow protection duct is attached after the unit is
installed, verify that dimension Q is 19-11/16 in. or more.
Min. O
Outdoor unit
C(H)2672R / 3072R /
3672R / 4872R
O
39-3/8
P
5-29/32
(2) Obstacles on both sides
Q
Min. 11-13/36
Min. 11-13/16
Min. 7-7/8
Min. 39-3/8
[Installation in front-rear rows]
• The top and both sides must remain open. Either the obstacle to the front or the obstacle
to the rear must be no taller than the height of the outdoor unit.
Min. 11-13/16
Min. 39-3/8Min. 7-7/8
Min. 59-1/16Min. 78-3/4
0
Dimension Q
If a snow protection duct is
attached after the unit is
installed, verify that dimension
Q is 19-11/16 in. or more.
Unit: inch
25
Page 26
3. HOW TO INSTALL THE INDOOR UNIT
4-Way Air Discharge Semi-Concealed Type
(X Type)
X
3-1. Suspending the Indoor Unit
This unit uses a drain pump. Use a carpenter’s level to
Hole-in-anchor
Hole-in-plug
ConcreteInsert
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.
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-1
(2) Follow Fig. 3-2 and Table 3-1 to make the holes in
the ceiling.
Table 3-1
Type
XH2672R
(PNR-XH2442)
XH3672R, XH4872R
(PNR-XH3642)
Length
AB
32-9/32 (820) 22-9/32 (566)
43-11/16 (1,110) 33-11/16 (856)
Unit: inch (mm)
X
A (Ceiling opening)
(Suspension bolt pitch)
)gninepo gnilieC( 23/9-23
Grille center
B
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.
Refrigerant tubing joint (gas tube side)
Suspension lug
E
Table 3-2
Type
Length
ABCDE
Unit: inch (mm)
XH2672R6-3/167-5/32 10-9/3212-1/84-7/8
(PNR-XH2442)(157)(182)(261)(308)(124)
XH3672R, XH4872R6-3/167-5/32 11-15/3213-1/164-7/8
(PNR-XH3632)(157)(182)(291)(338)(124)
nsion bolt pitch)epsuS( 61/31-92
Fig. 3-3
Fig. 3-2
Refrigerant
tubingside
Drain connection (other side)
(VP25)
Refrigerant tubing joint
(liquid tube side)
D
61/3
C
B
A
1
26
Page 27
3-3. Placing the Unit Inside the Ceiling
(1) When placing the unit inside the ceiling, determine
the pitch of the suspension bolts using the
supplied full-scale installation diagram. (Fig. 3-4)
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.
erom ro hcni 23/91
Full-scale installation diagram
(printed on a cardboard packing)
Full-scale installation
diagram
hc
n
i
8/7-
1
X
Fig. 3-4
(2) The length of each suspension bolt must be
appropriate for a distance between the bottom of
the bolt and the bottom of the ceiling of 19/32 in.
or more as shown in Fig. 3-4.
(3) Thread the 2 hexagonal nuts (field supply) and
washers 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.
(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.) (Fig. 3-4)
Nuts and washers
(Use above and below)
Double nuts
Suspension bolt
Suspension lug
Upper
Lower
Notch
1-7/8 inch
Fig. 3-5
27
Page 28
3-4. Installing the Drain Piping
(1) Prepare standard hard PVC pipe for the drain and
Transparent part for
checking drainage
Hose band
(supplied)
Hard PVC pipe
(not supplied)
use the supplied drain hose and hose band to prevent water leaks.
X
The PVC pipe must be purchased separately. The
transparent part allows you to check drainage.
(Fig. 3-6)
CAUTION
Tighten the hose clamps so
their locking nuts face upward.
Packing
(supplied)
Drain hose
(supplied)
Fig. 3-6
Drain hose
adapter
(supplied)
(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.
CAUTION
Do not install an air bleeder tube, 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 19-11/16 in. Do not
raise it any higher than 19-11/16 in., as this could
result in water leaks. (Fig. 3-9)
Do not install the pipe with an upward gradient from
the connection port. This will cause 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)
Provide insulation for any drain pipe that is run
indoors.
Fig. 3-7
Air bleeder
Fig. 3-8
11-3/4 in. or less (as short as possible)
19-11/16 in. or less
Fig. 3-9
Upward gradient
Fig. 3-10
Support
pieces
Fig. 3-11
28
Page 29
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 to catch
and wipe up spilled water.
Do not supply power to the
WARNING
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 104.
Be careful since the fan will
CAUTION
start turning when checking
the drainage.
X
5/16"(4 × 8 mm)
tapping screw
(3) After drain checking is finished, return the Opera-
tion Selector switch to the RUN position (ON position ) and remount the tube cover.
To mount the tube cover, use
WARNING
5/16" (4
××
8 mm) tapping
screws. Do not use long
screws as they may puncture
the drain pan and cause water
leakage.
Tube cover
Siphon
Fig. 3-12
29
Page 30
Ceiling Panel
Latch
Screw
Never touch or attempt to
CAUTION
move the air direction louver
by hand or you may damage
X
the unit. Instead, use the
remote control unit if you want
to change the direction or air
Air-intake grille
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)
Ceiling panel
(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 thumbs 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 cord (hook on the grille
side). (Fig. 3-14)
(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
Panel catch
Electrical
component box
Electrical
component box
Fig. 3-13
Safety cord
Unit body
Panel catch
(arrange facing downwards)
(2 locations)
Fig. 3-14
Air filter
45°
Clamp
Ceiling panel wiring
connector
Screws M5 with washer
(supplied)
Air filter
Air-intake grille
Fig. 3-15
30
Page 31
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.
NOTE
The ceiling panel must be mounted in the correct direction. Note that the 2 catches of the panel differ in size.
Confirm that the catches are correctly matched
between 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
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.
X
(5) Install the air filter and air-intake grille by perform-
ing the steps in section 3-6 in reverse.
NOTE
Rehook the safety cord before closing the air-intake
grille.
3-8. When Removing the Ceiling Panel
for Servicing
When removing the ceiling panel for servicing, remove
the air-intake grille and air filter, disconnect the wiring
connector inside the electrical component box, and then
remove the 4 mounting screws.
31
Page 32
3-9. Duct for Fresh Air
There is a duct connection part on side of the indoor
For fresh air intake
unit. (Fig. 3-16)
An optional air-intake plenum (including duct connection
X
box and flange) can be attached to the indoor unit.
Air-intake plenumType
CMB-GSJ80U
CMB-GSJ140U
PNR-XH2442
(XH2672R)
PNR-XH3642
(XH3672R, XH4872R)
8/3-2
2-5/32
e
l
o
h
8
/
1
ø-
4
/31-4ø
23
(1) Accessories
Check that the following parts are in the box when
unpacking.
NameRemarksʻQʼty
Cord with socket
(9P)intaking fresh air.
Screw
(M5 × L5 in.)(for fastening)
Screw
(M4 × L1/2 in.)(for fastening)
Duct connection box1(for fresh air)
Duct connection flange1
Connecting line. Not necessary for
1
Air-intake filter
4
Duct connection flange / box
7
(for connecting fresh air duct
(2) Installation
Installation steps (a) to (d) are the same for both the
CMB-GSJ80U and the CMB-GSJ140U. The figure
illustrates installation of air-intake plenum to the
indoor unit. (Fig. 3-17)
(a) Installing the air-intake plenum
Set the air-intake plenum to the indoor unit taking care
not to set it in the wrong direction. (Fig. 3-17)
Fasten the air-intake plenum with the accessory screws.
(M5 × L5 in., 4 pcs) (Fig. 3-17)
(b) Installing the duct connection box
Fasten the duct connection flange to the duct connection box with the accessory screws.
(M4 × L1/2 in., 4 pcs) (Fig. 3-18)
Put the duct connection box into the rectangular hole of
the air-intake plenum and fasten it to both sides of the
indoor unit and plenum with the accessory screws.
(M4 × L1/2 in., 3 pcs) (Fig. 3-18)
(c) Installing the indoor unit
Install the indoor unit to the ceiling. (Install the indoor
unit according to items 3-1 to 3-6.)
Installation
screws
Air-intake
plenum
Indoor unit
Detail of fresh air intake
Fig. 3-16
)
Socket cover
Panel lead wire (8P)
Clamper
8P socket (red)
(electrical
component box)
8P socket (red)
(ceiling panel side)
When installing in a pre-
CAUTION
existing location, install the
indoor unit before installing
the duct connection box.
Fig. 3-17
32
Page 33
(d) Installing the ceiling panel
Attach the ceiling panel to the chamber. Drawing the
panel downwards sets the panel in position temporarily
with the panel catch (at 2 locations).
Remove the socket cover of the air-intake plenum and
pass the 8P sockets through it. (Fix the panel lead wire
with the chamber side clamp.) (Fig. 3-17)
Connect the 8P socket (electrical component box side)
to the 8P socket (ceiling panel side) of the indoor unit
electrical component box.
Reattach the socket cover.
Duct
connection
flange
Installation screws
(M4 × 1/2 in.)
Panel catch
Ceiling panel
Duct connection box
X
Fig. 3-18
33
Page 34
Wall-Mounted Type (K Type)
3-10. Removing the Wall Fixture from the Unit
KH2672R
Remove and discard the set screws and take off the
rear panel. (Fig. 3-19)
NOTE
K
Set screws for transportation only
Fig. 3-19
Tubing can be extended in 3 directions as shown in
Fig. 3-20. Select the direction that provides the shortest
run to the outside unit.
Left-rear tubling
Right-rear
tubing
(recommended)
3-11. Selecting and Making a Hole
KH2672R
(1) Remove the rear panel from the indoor unit and
place it on the wall at the location selected. Make
sure the unit is horizontal using a carpenter’s level
or tape measure to measure down from the ceiling.
(2) Determine which side of the unit you should make
the hole. (Fig. 3-21)
(3) Before making a hole, check carefully that no studs
or pipes are directly run behind the spot to be cut.
Also avoid areas where electri-
CAUTION
cal wiring or conduits are
located.
Fig. 3-20
In case of left-rear or right-rear tubing
Center of
left-rear
tubing hole
Fig. 3-21
Right tubing
Center of
right-rear
tubing hole
The above precautions are also applicable if tubing
goes through the wall in any other location.
(4) Using a sabre saw, key hole saw or hole-cutting
drill attachment, cut a hole in the wall. See Table
3-3 and Fig. 3-22.
Table 3-3
Hole Dia. (inch)
3-3/16"
(5) Measure the thickness of the wall from the inside
edge to the outside edge and cut PVC pipe at a
slight angle 1/4" shorter than the thickness of the
wall. (Fig. 3-23)
(6) Place the plastic cover over the end of the pipe (for
indoor side only) and insert in the wall.
(Fig. 3-24)
NOTE
Hole should be made at a slight downward slant to
the outdoor side.
PVC pipe (locally purchased)
Indoor
side
Outdoor
side
Fig. 3-22
INSIDE
Wall
Plastic cover
(Field supply)
OUTSIDE
Slight
angle
Fig. 3-24
34
Cut at slight angle
Fig. 3-23
PVC pipe
Page 35
KH3072R, KH3672R
One hole is required for the air conditioner tubing, and
may be either on the left or right side. (Also see section
3-14. Preparing the Indoor Side Tubing.)
(1) Tape the full-scale installation diagram on the wall
at the location selected. Make sure the unit is
horizontal using a level or tape measure to
measure down from the ceiling. (Fig. 3-25)
(2) Determine if the hole is to be drilled at the left or
right hole location.
(3) Before drilling a hole, check that there are no
studs or pipes behind the determined location.
Avoid any area where electrical
CAUTION
wiring or conduit is located.
Also take this precaution if the
tubing goes through a wall at
any other location.
(4) Using a sabre saw, key hole saw or 3-5/32 in.
hole-cutting drill attachment, make a hole in the
wall. The required minimum hole diameter for
these models is 3-3/16 in. (Fig. 3-26)
(5) Measure the thickness of the wall from the inside
edge to the outside edge and cut PVC pipe at a
slight angle 1/4 in. shorter than the thickness of
the wall. (Fig. 3-27)
Tape
Full-scale
installation diagram
Fig. 3-25
NOTE
Hole should be made at a slight downward slant to
the outdoor side.
Indoor
side
Outdoor
side
K
(6) Place the plastic cover over the end of the pipe,
(for indoor side only) and insert in the wall.
(Fig. 3-28)
35
Fig. 3-26
PVC pipe (locally purchased)
Cut at slight angle
Fig. 3-27
INSIDE
Plastic
cover
Wall
Fig. 3-28
OUTSIDE
PVC pipe
Slight
angle
Page 36
KHH2672R
Remove and discard the set screws and take off the
wall fixture. (Fig. 3-29)
KHH2672R
Wall fixture
(1) Tape the full-scale installation diagram on the wall
at the location selected. Make sure the unit is hori-
K
zontal using a level or tape measure to measure
down from the ceiling. (Fig. 3-30)
(2) Before drilling a hole, check that there are no studs
Set screws only for transportation
Fig. 3-29
Tape
lacs-lluF
noitallatsni e
margaid
or pipes behind the determined location.
Avoid any area where electrical
CAUTION
wiring or conduit is located.
Also take this precaution if the
tubing goes through a wall at
any other location.
(3) Using a sabre saw, key hole saw or 3-5/32 in.
hole-cutting drill attachment, make a hole in the
wall. The required minimum hole diameter for
these models is 3-3/16 in. (Fig. 3-31)
NOTE
Hole should be made at a slight dowward slant to the
outdoor side.
Fig. 3-30
(4) Measure the thickness of the wall from the inside
edge to the outside edge and cut PVC pipe at a
Indoor
side
Outdoor
side
slight angle 1/4 in. shorter than the thickness of
the wall. (Fig. 3-32)
(5) Place the plastic cover over the end of the pipe,
(for indoor side only) and insert in the wall.
(Fig. 3-33)
Fig. 3-31
PVC pipe (locally purchased)
Cut at slight angle
Fig. 3-32
INSIDE
Plastic
cover
Wall
Fig. 3-33
OUTSIDE
PVC pipe
Slight
angle
36
Page 37
3-12. Installing the Rear Panel on the Wall
KH2672R
Be sure to confirm that the wall is strong enough to suspend
the unit.
See either Item a) or b) below depending on the wall type.
a) If Wooden Wall
(1) Attach the rear panel to the wall with the 10 screws provid-
ed. (Fig. 3-34)
If you are not able to line up the holes in the rear panel
with the beam locations marked on the wall, use toggle
bolts to go through the holes on the panel or drill 3/16 in.
dia. holes in the panel over the stud locations and then
mount the rear panel.
(2) Double-check with a ruler or carpenter’s level that the
panel is level. This is important to install the unit properly.
(Fig. 3-35)
(3) Make sure the panel is flush against the wall. Any space
between the wall and unit will cause noise and vibration.
b) If Block, Brick, Concrete or Similar Type Wall
Make 3/16" dia. holes in the wall. Insert rawl plugs for appropriate mounting screws. (Fig. 3-36)
KH3072R, KH3672R
Fig. 3-34
Fig. 3-35
1-3/16
Fig. 3-36
"
or more
3/16
"
dia. hole
Rawl plug
(Field supply)
K
Confirm that the wall is strong enough to support the unit.
a) If Wooden Wall
(1) Attach the wall fixture to the wall with the 12 screws pro-
vided. (Fig. 3-37) If you are not able to line up the holes in
the wall fixture with the beam locations marked on the
wall, use rawl plugs or toggle bolts to go through the holes
on the panel or drill 3/16 in. dia. holes in the wall fixture
over the stud locations.
(2) Check with a tape measure or carpenter’s level that the
wall fixture is level. This is important so that the unit is correctly installed.
(3) Make sure the wall fixture is flush against the wall. Any
space between the wall and unit will cause noise and
vibration.
b) If Block, Brick, Concrete or Similar Type Wall
Make 3/16 in. dia. holes in the wall. Insert rawl plugs for
appropriate mounting screws. (Fig. 3-36)
37
Wall fixture
Fig. 3-37
Page 38
KHH2672R
wall fixture
Confirm that the wall is strong enough to support the
unit.
a) If Wooden Wall
(1) Attach the wall fixture to the wall with the 9 screws
provided. (Fig. 3-38)
K
If you are not able to line up the holes in the wall
fixture with the beam locations marked on the wall,
Fig. 3-38
use rawl plugs or toggle bolts to go through the
holes on the panel or drill 13/64 in. dia. holes in the
panel over the stud locations and then mount the
wall fixture.
3/16 in.
dia. hole
(2) Check with a tape measure or carpenter’s level
that the wall fixture is level. This is important so
that the unit is correctly installed.
(3) Make sure the wall fixture is flush against the wall.
Any space between the wall and unit will cause
noise and vibration.
b) If the Wall is Brick, Concrete or Similar
Drill 3/16 in. dia. holes in the wall. Insert rawl plugs for
appropriate mounting screws. (Fig. 3-39)
Rawl plug
Fig. 3-39
38
Page 39
3-13. Remove the Grille to Install the Indoor Unit
Grille
KH2672R
Basically, these models can be installed and wired
without removing the grille. If access to any internal
part is needed, follow the steps given below:
How to remove the grille
(1) Set the 2 flaps in the horizontal position.
(2) Unscrew the 3 screws. (Fig. 3-40a)
(3) Remove the grille.
(a) Hold both corners of the air intake grille, then
pull out and up to open. (Fig. 3-40b)
(b) Use a standard screwdriver to push up the 3
tabs to remove the grille. (Fig. 3-40b)
(c) Pull the lower part of the grille toward you to
remove. (Fig. 3-40a)
How to replace the grille
Air-intake grille
K
Fig. 3-40a
Air-intake grille
Fig. 3-40b
(1) Close the flaps.
(2) Reinstall the grille into the lower part while aligning
its tabs on the upper part. (Fig. 3-41a) Insert the
tabs in the slots and push the lower part of the
grille back into position.
(3) Press at each of the 5 tabs to completely close the
grille. Make sure that the grille and frame are firmly
fitted together. (Fig. 3-41b)
Fig. 3-41a
Fig. 3-41b
39
Page 40
KH3072R, KH3672R
How to Remove the Grille
(1) Remove the plastic cover. (Fig. 3-42)
(2) Remove the clamp for the wiring connector.
(Fig. 3-43)
(3) Disconnect the 2 wiring connectors. (Fig. 3-44)
K
Plastic cover
Screw
(4) Set the flap in the horizontal position. (Fig. 3-45)
(5) Remove the 3 screws. (Fig. 3-45)
Fig. 3-42
(6) Remove the grille. (Fig. 3-45)
NOTE
When replacing the grille, be careful not to crush the
lead wires between the grille and the frame.
(Fig. 3-45)
Clamp
Screw
Fig. 3-43
Grille
Flap
Screws
Wiring
connectors
Fig. 3-44
Frame
Fig. 3-45
40
Page 41
3-14. Preparing the Indoor Side Tubing
Indoor unit
Bottom
cover
Left
side
cover
Right
side
cover
L-shaped tube
Frame
KH2672R
Arrangement of tubing by directions
(a) Right tubing
The corner of the right frame needs to be cut by
a hacksaw or the like. (Fig. 3-46)
(b) Right-rear or left-rear tubing
In this case, the corner of the frame need not be
cut.
To mount the indoor unit on the rear panel:
(a) Hang the 3 mounting slots of the unit on the
upper tabs of the rear panel. (Fig. 3-47)
KH3072R, KH3672R
Tubing can be extended in 4 directions as shown in
Fig. 3-54.
Arrangement for Right-rear Tubing
Mounting slot
Right tubing
outlet
Fig. 3-46
Ta b
K
Fig. 3-47
Tubing
from the
outdoor
unit
(a) Remove the 2 screws and slide out the side
cover. (Fig. 3-48)
(b) Extend the gas tube from the outdoor side and
connect it directly to the mating tube inside the
indoor unit. Use a flare nut. (Fig. 3-49)
Arrangement for Right Tubing
(a) Remove the 2 screws and take off the side cover.
(Fig. 3-48)
(b) Cut out the L-shaped tubing outlet using a
hacksaw. (Fig. 3-50)
(c) Using the L-shaped tube (field supply),
connect tubing between the indoor and
outdoor units. (Fig. 3-52)
Arrangement for Left and Left-rear Tubing.
(a) Remove the 4 screws (2 on each side) and take
off both left and right side cover.
(Fig. 3-51)
Fig. 3-48
Fig. 3-49
Hacksaw
Fig. 3-50
Fig. 3-51
(b) Remove 4 screws to remove the bottom cover.
(c) Using the L-shaped tube (field supply), connect
tubing as in Fig. 3-53.
41
Fig. 3-52
L-shaped
tube
Fig. 3-53
Page 42
KHH2672R
Tubing can be extended in 4 directions as shown in
Fig. 3-54.
Arrangement for Left Tubing
Left
tubing
Left-rear
tubing
Right-rear
tubing
(Recommended)
(a) Cut out the left tubing outlet. (Fig. 3-55)
Right tubing
Arrangement for Right Tubing
K
Fig. 3-54
(a) Cut out the right tubing outlet using a hacksaw.
(Fig. 3-56)
Arrangement for Left-rear and Right-rear Tubing
(a) It is not necessary to cut a hole.
Left tubing
outlet
Right tubing
outlet
3-15. Wiring Instructions
General Precautions on Wiring
Fig. 3-55
Fig. 3-56
(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. 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) All wiring must be connected tightly.
(5) Do not allow wiring to touch refrigerant tubing,
compressor, or any moving parts of the fan.
Unauthorized changes in the
WARNING
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.
42
Page 43
3-16. Wiring Instructions for Inter-Unit Connections
KH2672R
(1) Insert the inter-unit wiring (according to local
electrical codes) into the through-the-wall PVC
pipe. Run the wiring toward the indoor side allowing
approx. 10 inches to extend from the wall face.
(Fig. 3-57)
(2) Route the inter-unit wiring from the back of the
indoor unit and pull it toward the front for
connection. (Figs. 3-58a and 3-58b)
(3) Connect the inter-unit wiring to the corresponding
terminals on the terminal plate (Figs. 3-58a and
3-58b) while referring to the wiring diagram.
(4) Be sure to secure the wiring with the provided
clamp.
How to remove the cover plate
To access the terminal plate inside the indoor unit,
follow these steps.
Rear
panel
Wiring
10 in.
Fig. 3-57
Wall
Plastic
cover
K
Terminal
plate
(1) Using a Phillips screwdriver, remove the screw on
the cover plate. (Figs. 3-58a and 3-58b)
(2) Remove the cover plate.
Cover plate
Fig. 3-58a
Inter-unit
control line
wiring
Earth
plate
Lock nut
Top of conduit
connector
Fig. 3-58b
43
Page 44
(1) Insert the inter-unit wiring (according to local
KHH2672R
codes) into the through-the-wall PVC pipe. Run the
wiring toward the indoor side allowing approx. 5" to
extend from the wall face.
(Figs. 3-59a and 3-59b)
Never fix the wiring by any
CAUTION
means before the indoor unit is
fully seated on the rear panel.
Rear
panel
Wiring
Wall
Plastic
cover
K
(2) Remove the side cover and the metallic cover.
(Fig. 3-60 or 3-61, depending on model.)
5"
(3) Secure the conduit connector to the chassis with a
lock nut. (Fig. 3-60 or 3-61)
Fig. 3-59a
(4) Give some play to the inter-unit wiring from the
outdoor unit to the corresponding terminals on the
terminal plate.
Be sure to refer to the wiring
CAUTION
system diagram label inside
the metallic cover and carry
KH3072R, KH3672R
Wall fixture
Wall
out the correct field wiring.
Wrong wiring can cause the
unit to malfunction.
Check local electrical codes
ConnectorWiring
and any specified wiring
instructions or limitations.
(5) Secure the metallic cover with its screw. Then
replace the side cover.
KHH2672R
Lock
nut
Power line
Grounding
line
Look nut
Elbow
conduit
Metallic cover
Plastic cover
Screw
5"
Fig. 3-59b
KH3072R, KH3672R
Metallic cover
Lock
nut
Connector
Side cover
Fig. 3-60
Fig. 3-61
44
Page 45
KHH2672R
(1) Shape the refrigerant tubing so that it can easily go into
the wall hole. (Fig. 3-62)
If using a stepladder, be careful to
CAUTION
(2) Push the wiring, refrigerant tubing, and drain hose
through the hole in the wall. Adjust the indoor unit so it is
securely seated on the rear panel.
(3) Carefully bend the tubing (if necessary) to run along the
wall in the direction of the outdoor unit and then tape as
far as the fittings.
CAUTION
(4) Connect the refrigerant tubing to the outdoor unit. (After
performing a leak test on the connecting part, insulate it
with tubing insulation. (Fig. 3-64)) Also, refer to Section
10-5. Connecting Tubing between Indoor and Outdoor
Units.
(5) Assemble the refrigerant tubing, drain hose, and
inter-unit wiring as shown in Fig. 3-65.
keep your balance and not fall off.
To prevent the unit from damage
and avoid personal injury, ask for
someone’s help when feeding the
tubing through the hole because
the unit is heavy and difficult to
hold in place.
The air conditioner’s performance
will deteriorate if a tube is crushed.
To prevent crushing of tubing,
avoid sharp bends. Use a pipe
bending tool to bend tubes.
(Fig. 3-63)
Cover
Fig. 3-62
Pipe bending tool
Fig. 3-63
Fig. 3-64
Refrigerant tubing
Conduit
Fig. 3-65
Refrigerant
tubing
Inter-unit
wiring
Drain hose
K
b
a
b / a = 0.7 or more
Insulation
(Field supply)
Drain hose
Inter-unit wiring
KH3072R, KH3672R
(1) Shape the narrow refrigerant tube and drain hose in the
desired direction so that they can easily go into the wall
hole. (Fig. 3-66)
(2) Push the wiring, narrow tube, and drain hose through
the hole in the wall.
(3) Bend the tubing (if necessary) to run along the wall in
the direction of the outdoor unit, then tape as far as the
fittings. The drain hose should come straight down the
wall to a point where water runoff won't stain the wall.
(4) Hang the indoor unit on the wall fixture. (Fig. 3-67)
(5) Install the mounting plate to secure the indoor unit
solidly to the wall. The plate can be positioned in either
of the 2 ways shown. (Fig. 3-68)
45
Or
Screws
Fig. 3-66
Drain hose
Fig. 3-68
Liquid
tube
Mounting plate
Wall
Indoor
unit
Wall fixture
Fig. 3-67
Page 46
3-17. Shaping the Tubing
Cover
KHH2672R
Refrigerant
tubing
(1) Shape the refrigerant tubing so that it can easily go
into the hole. (Fig. 3-69)
Inter-unit
(2) Push the wiring, refrigerant tubing and drain hose
through the hole in the wall. Adjust the indoor unit
K
so it is securely seated on the wall fixture.
Fig. 3-69
Drain hose
wiring
(3) Carefully bend the tubing (if necessary) to run
along the wall in the direction of the outdoor unit
and then insulate to the end of the fittings. The
drain hose should come straight down the wall to a
point where water runoff will not stain the wall.
(4) Connect the refrigerant tubing to the outdoor
Fig. 3-70
Insulating
tape
unit.(After performing a leak test on the connection,
insulate it with insulating tape. (Fig. 3-70)) Also,
refer to Section 10-5. Connecting Tubing between
Indoor and Outdoor Units.
(5) Assemble the refrigerant tubing, drain hose and
Refrigerant tubing
Inter-unit wiring
inter-unit wiring as shown in Fig. 3-71.
Drain hose
Fig. 3-71
3-18. Installing the Drain Hose
(1) The drain hose should be slanted downward on the
outdoor side. (Fig. 3-72)
(2) Never form a trap in the course of the hose.
(3) If the drain hose will run in the room, insulate* the
hose so that chilled condensation will not damage
furniture or floors. (Fig. 3-73)
* Foamed polyethylene or its equivalent is
recommended.
Do not supply power to the unit
WARNING
or operate it until all tubing and
wiring to the outdoor unit are
completed.
Indoor
unit
Fig. 3-72
Insulation material
(field supply)
must be used.
Fig. 3-73
Slant
Drain
hose
Condensation
46
Page 47
Ceiling-Mounted Type (T Type)
F
3-19. Suspending the Indoor Unit
ront face
(1) Place the full-scale diagram (supplied) on the
ceiling at the spot where you want to install the
indoor unit. Use a pencil to mark the drill holes.
(Fig. 3-74).
NOTE
Since the diagram is made of paper, it may shrink or
stretch slightly because of high temperature or
humidity. For this reason, before drilling the holes
maintain the correct dimensions between the markings.
(2) Drill holes at the 4 points indicated on the full-scale
diagram.
(3) Depending on the ceiling type:
(a) Insert suspension bolts as shown in Fig. 3-75.
or
(b) Use existing ceiling supports or construct a
suitable support as shown in Fig. 3-76.
Rear
Hole-in-anchor
Hole-in-plug
Full-scale diagram
Fig. 3-74
ConcreteInsert
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-75
Ceiling tiles
Ceiling support
T
It is important that you use
WARNING
extreme care in supporting the
indoor unit from the ceiling.
Ensure that the ceiling is
sufficiently strong enough to
support the weight of the unit.
Before hanging the ceiling unit,
test the strength of each
attached suspension bolt.
(4) Screw in the suspension bolts, allowing them to
protrude from the ceiling as shown in Fig. 3-76.
The distance of each exposed bolt must be of
equal length within 2 inches. (Fig. 3-77)
A
unit
A
Fig. 3-76
Fixture
Fig. 3-77
Ceiling
surface
.n
i 2
n
iht
i
W
47
Page 48
(5) Before suspending the indoor unit, remove the 2
screws on the latch of the air-intake grilles, open
the grilles, and remove them by pushing the claws
of the hinges as shown in Fig. 3-78. Then remove
both side panels sliding them along the unit toward
the front after removing the two screws which fix
them. (Fig. 3-79)
Screw
Latch
Pull out the
air-Intake grille
pushing claws
of the hinges
S
edil
Hinge
(6) Preparation for suspending the indoor unit. The
suspension method varies depending on whether
the unit is next to the ceiling or not.
(Figs. 3-80 and 3-81)
washers through the notches, to fix it in place.
(Fig. 3-83)
Washer
(supplied)
Suspension bolt
.
x
orppA
Ceiling
surface
Nut
(field supply)
h
c
n
i
1
(c) Tighten the two hexagonal nuts on each
suspension bolt to suspend the indoor unit as
shown in Fig. 3-84.
NOTE
A ceiling surface is not always level. Please confirm that
the indoor unit is evenly suspended. For the installation
to be correct, leave a clearance of about 3/8 in.
between the ceiling panel and the ceiling surface and fill
the gap with an appropriate insulation or filler
material.
(8) If the tubing and wiring are to go towards the rear
of the unit, make holes in the wall. (Fig. 3-85)
(9) Measure the thickness of the wall from the inside
to the outside and cut PVC pipe at a slight angle to
fit. Insert the PVC pipe in the wall. (Fig. 3-86)
Fig. 3-82
T
Fig. 3-83
PVC pipe (locally purchased)
49
Fig. 3-84
Indoor
side
Fig. 3-85
INSIDE
Cut at slight angle
Fig. 3-86
Outdoor
side
Wall
OUTSIDE
PVC pipe
Slight
angle
Page 50
3-20. Duct for Fresh Air
There is a duct connection port (knock-out hole) at the
right-rear on the panel top of the indoor unit for drawing
in fresh air. If it is necessary to draw in fresh air, remove
the cover by knocking it out and connect the duct to the
indoor unit through the connection port. (Fig. 3-87)
If connection at the right-rear on the panel top is not
appropriate, another duct connection port can be made
by cutting an opening on the left side of the rear panel of
the indoor unit as shown in Fig. 3-88.
Duct connection port
(Knock-out hole)
Panel Top
Fig. 3-87
T
3-21. Installing the Drain Piping
Prepare a standard PVC pipe for the drain and
connect it to the indoor unit drain pipe with the
supplied hose clamps to prevent water leaks.
Connect the drain piping so that it slopes downward
Right side
Rear side
A
4-11/32"
B
from the unit to the outside. (Fig. 3-89)
Never allow traps to occur in the course of the piping.
Insulate any piping inside the room to prevent
dripping.
Use the supplied drain pipe to connect the drain pipe
with the drain outlet of the indoor unit.
After connecting the drain pipe securely, wrap the
Cut this portion
TH3672R, TH4872R, THH3672RTH2672R, THH2672R
A3-15/16"7-3/32"
B
1-3/8"1-31/32"
Fig. 3-88
3-15/16"
supplied drain pipe insulator around the pipe, seal
the gap at the drain socket with the supplied black
insulation tape, then secure it with clamps.
Min. 1/100
(Fig. 3-90)
After the drain piping, pour water into the drain pan to
check that the water drains smoothly.
Good
Check local electrical codes
CAUTION
and regulations before
obtaining wire. Also, check any
specified instruction or
limitations.
50
Packing
(supplied)
Not good
Fig. 3-89
Drain hose
(supplied)
Fig. 3-90
Drain pipe
clamp
(supplied)
Hard PVC pipe
(not supplied)
Drain hose
adapter
(supplied)
Page 51
Concealed-Duct Type (U Type)
3-22. Required Minimum Space for
Installation and Service
This air conditioner is usually installed above the
A (Suspension bolt pitch)
ceiling so that the indoor unit and ducts are not
visible. Only the air intake and air outlet ports are
visible from below.
The minimum space for installation and service is
min.
9-27/32
23/72-22
Indoor Unit
shown in Fig. 3-91 and Table 3-4.
It is recommended that space is provided (17-23/32
× 17-23/32 in.) for checking and servicing the
electrical system.
Fig. 3-92 and Table 3-5 show the detailed
dimensions of the indoor unit.
Power supply outlet (2-ø1-3/16 hole)
Fresh air intake port (ø5-29/32 hole)
Flange for the flexible air outlet duct (ø7-7/8 hole)
9
Tube cover
10
Electrical component box
11
Flange for the air intake duct
(Option or field supply)
M-ø1/8
(Hole)
Inspection access
(17-23/32
×
17-23/32)
(Field supply)
23/71-4
Inspection access panel
L-ø1/4
(Hole)
I
EEEF2-15/16
A (O.D.)
H (Duct suspension bolt pitch)
G (Ceiling opening dimension)
B
C
D(5-29/32)
(Suspension bolt pitch)
13/32
IJJK
3/43/4
4-ø15/32
(Hole)
1-7/321-7/32
1-9/16
2-9/16
31/32 8-9/32
23/1361/31-42
23/31
61/3-14/3-2
6
1
/5-6
23/13
23/11-3
2-3/4
23/72-9
.nim
4/3-51
.nim
(9-21/32×1)
(9-21/32×2)
12-7/32
31/32
6-7/8
1-3/8
5-1/8
11-7/32
Ceiling
Electrical
component box
Inspection
access
17-23/32
17-23/32
Refrigerant
tubing
min. 25-19/32
Unit: inch (mm)
9-27/32 12 16
9-7/16 16 18
10
9
23/
51
7
×
Unit: inch
No. of
holes
L
M
U
Fig. 3-92
51
Page 52
3-23. Suspending the Indoor Unit
Hole-in-anchor
Hole-in-plug
ConcreteInsert
Depending on the ceiling type:
• Insert suspension bolts as shown in Fig. 3-93
or
• Use existing ceiling supports or construct a suitable
support as shown in Fig. 3-94.
Suspension bolt (M10 or 3/8")
(field supply)
It is important that you use
WARNING
extreme care in supporting the
Fig. 3-93
indoor unit inside the ceiling.
Ensure that the ceiling is strong
enough to support the weight of
Ceiling tiles
Ceiling support
the unit. Before hanging the unit,
test the strength of each
attached suspension bolt.
U
(1) When placing the unit inside the ceiling,
determine the pitch of the suspension bolts
referring to the dimensional data on the previous
page. (Fig. 3-92)
Tubing must be laid and connected inside the
ceiling when suspending the unit. If the ceiling is
Fig. 3-94
already constructed, lay the tubing into position for
connection to the unit before placing the unit inside
Suspension bolt
the ceiling.
Suspension lug
(2) Screw in the suspension bolts allowing them to
protrude from the ceiling as shown in Fig. 3-93.
(Cut the ceiling material, if necessary.)
Nuts and washers
(2 sets)
Upper
(3) Thread the 2 hexagonal nuts and washers (field
supply) onto the 4 suspension bolts as shown in
Figs. 3-95 and 3-96. Use 2 sets of nuts and washers (upper and lower), so that the unit will not fall
off the suspension lugs.
Lower
Fig. 3-95
Suspension bolt
Hexagonal nut
Fig. 3-96
52
Page 53
Fig. 3-97 shows an example of installation.
Bolt anchor
Air outlet duct
Air-outlet grille
Ceiling materialIndoor unit
3-24. Installing the Drain Piping
(1) Prepare standard hard PVC pipe for the drain and
use the supplied hose band to prevent water leaks.
The PVC pipe must be purchased separately.
When doing this, leave a gap between the drain
socket of the unit and the PVC pipe to allow the
drainage to be checked. The transparent drain
pipe allows you to check drainage. (Fig. 3-98)
Tighten the hose clamps so
CAUTION
their locking nuts face upward.
(Fig. 3-98)
Fig. 3-97
Air-intake grille
Transparent part for
checking drainage
Packing
(supplied)
Drain hose
(supplied)
Suspension bolt
Air-intake duct
Hose band
(supplied)
Drain hose
adapter
(supplied)
Fig. 3-98
Hard PVC pipe
(not supplied)
U
(2) After connecting the drain piping securely, wrap the
supplied packing and drain pipe insulator around
the pipe, then secure it with the supplied clamps.
(Fig. 3-99)
NOTE
Make sure the drain pipe has a downward gradient
(1/100 or more) and that there are no water traps.
Clamps (supplied)
Drain insulator (supplied)
Fig. 3-99
53
Page 54
CAUTION
Air bleeder
Do not install an air bleeder tube as this may cause
Not good
water to spray from the drain pipe outlet. (Fig. 3-100)
If it is necessary to increase the height of the drain
pipe, the section directly after the connection port
Fig. 3-100
can be raised a maximum of 19-11/16 in.
Do not raise it any higher than 19-11/16 in., as this
could result in water leaks. (Fig. 3-101)
Do not install the pipe with an upward gradient from
Good
11-13/16 in. or less
19-11/16 in. or less
the connection port. This will cause the drain water
to flow backward and leak when the unit is not
operating. (Fig. 3-102)
Do not apply force to the piping on the unit side
when connecting the drain pipe. The pipe should not
U
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. 3-103)
No good
Fig. 3-101
Upward gradient
3-25. Checking the Drainage
After wiring and drain piping are completed, use the
following procedure to check that the water will drain
Fig. 3-102
smoothly. For this, prepare a bucket and wiping cloth to
catch and wipe up spilled water.
Support pieces
(1) Connect power to the power terminal board (L1, L2
terminal) inside the electrical component box.
(2) Remove the tube cover and through the opening,
slowly pour about 43 oz. of water into the drain pan to
check drainage.
(3) Short the check pin (CN5 white) on the indoor control
board and operate the drain pump. Check the water
flow and see if there is any leakage.
Be careful since the fan will start
CAUTION
when you short the pin on the
indoor control board.
(4) When the check of drainage is complete, open the
check pin (CN5 white) and remount the insulator and
drain cap onto the drain inspection port.
To mount the tube cover, use 5/16"
CAUTION
(4 ××8 mm) tapping screws.
Do not use long screws as they
may puncture the drain pan and
cause water leak-age.
Good
Fig. 3-103
54
Page 55
3-26. Increasing the Fan Speed
If external static pressure is too great (due to long
extension of ducts, for example), the air flow volume
may drop too low at each air outlet. This problem may
be solved by increasing the fan speed using the
following procedure:
(1) Remove 4 screws on the electrical component box
and remove the cover plate.
(2) Disconnect the fan motor sockets in the box.
(3) Take out the booster cable (sockets at both ends)
clamped in the box.
(4) Securely connect the booster cable sockets
between the disconnected fan motor sockets in
step 2 as shown in the Fig. 3-104.
(5) Place the cable neatly in the box and reinstall the
cover plate.
Fan
motor
Electrical component box
Booster cable
Booster cable
Fan motor socket
(At shipment)(Booster cable installed)
Fig. 3-104
U
How to read the diagram
The vertical axis is the external static pressure (Pa)
while the horizontal axis represents the air flow (CFM).
The characteristic curves for “HT”, “H”, “M” and “L” fan
speed control are shown.
The nameplate values are shown based on the “H” air
flow. For the 26 type, the air flow is 636 CFM, while the
external static pressure is 49 Pa at “H” position. If
external static pressure is too great (due to long
extension of duct, for example), the air flow volume
may drop too low at each air outlet.
This problem may be solved by increasing the fan
speed as explained above.
er
usserP citatS
la
nr
e
txE
150
100
50
e
ni
l
t
im
)
aP
iL
(
tim
i
L
0
Air Flow (CFM)
NOTE
26 Type
e
n
i
l
L
Indoor Fan Performance
200
)aP(
)
qAn
150
i
(
0.5
0.4
0.3
HT
0.2
HH
H
700500300
0.1
0
900
erusserP c
100
i
tatS lanretx
50
E
0
5001000
HT : Using the booster cable
36 Type
enil
timiL
enil t
imi
L
L
Air Flow (CFM)
0.8
)qAni(
0.6
0.5
0.4
0.3
HT
0.2
HH
H
0.1
0
H : At shipment
Fig. 3-105
55
Page 56
4. HOW TO INSTALL THE OUTDOOR UNIT
4-1. Installing the Outdoor Unit
Use concrete or a similar material to create the base, and
ensure good drainage.
Ordinarily, ensure a base height of 2 in. or more. If a drain
pipe is used, or for use in cold-weather regions, ensure a
height of 6 in. or more at the feet on both sides of the unit.
(In this case, leave clearance below the unit for the drain
pipe, and to prevent freezing of drainage water in coldweather regions.)
Refer to the Fig. 4-1 for the anchor bolt dimensions.
Be sure to anchor the feet with the anchor bolts (M10). In
addition, use anchoring washers on the top side. (Use large
square 32 × 32 SUS washers with diameters of 10.)
(Field supply)
4-2. Drainage Work
Follow the procedure below to ensure adequate draining for
the outdoor unit.
For the drain port dimensions, refer to the figure at right.
Ensure a base height of 6 in. or more at the feet on both
sides of the unit.
When using a drain pipe, install the drain socket (optional
part STK-DS25T) onto the drain port. Seal the other drain
port with the rubber cap supplied with the drain socket.
For details, refer to the instruction manual of the drain
socket (optional part STK-DS25T).
4-3. Routing the Tubing and Wiring
The tubing and wiring can be extended out in 4 directions:
front, rear, right, and down.
The service valves are housed inside the unit. To access
them, remove the inspection panel. (To remove the inspection panel, remove the 3 screws, then slide the panel
downward and pull it toward you.)
(1) If the routing direction is through the front, rear, or right,
use a nipper or similar tool to cut out the knockout holes
for the inter-unit control wiring outlet, power wiring outlet,
and tubing outlet from the appropriate covers A and B.
(2) If the routing direction is down, use a nipper or similar tool
to cut out the lower flange from cover A.
Route the tubing so that it does
CAUTION
not contact the compressor,
panel, or other parts inside the
unit. Increased noise will result if
the tubing contacts these parts.
When routing the tubing, use a
tube bender to bend the tubes.
Drain port (2 locations)
6-47/64
13-13/64
11-21/32
33/6433/64
Drain port
Inter-unit control wiring outlet
Inspection panel
Cover A
Power wiring outlet
8-5/8
Front
25-63/64
5-29/32
942
Fig. 4-1
Fig. 4-2
33/6433/64
Down
Tubing outlet
4-3/8
25/32
25/6414-61/64
15-15/16
3/4
19/32
Anchor bolt (M10)
Rear
Cover B
Right
56
Page 57
5. ELECTRICAL WIRING
5-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit
as shown on its nameplate, then carry out the
wiring closely following the wiring diagram.
(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
accordance 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, must follow your
LOCAL ELECTRICAL CODES 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 remote control wiring and the inter-unit
control wiring should be wired apart from the
inter-unit power wiring.
Use shielded wires for inter-unit control wiring
between units and ground the shield on both
sides.
(9) If the power supply cord of this appliance is dam-
aged, it must be replaced by a repair shop
appointed by the manufacturer, because specialpurpose tools are required.
(10) All wiring used must be Class 1.
5-2. Recommended Wire Length and Wire Diameter for Power Supply System
You must follow LOCAL ELECTRICAL CODES for wiring.
Outdoor Unit
Model Name (A) Power Supply
CH2672R
CH3072R
CH3672R
CH4872R
AWG #12
Max. length 64 ft.
AWG #10
Max. length 92 ft.
AWG #10
Max. length 92 ft.
AWG #10
Max. length 81 ft.
Model Name (A) Power Supply
C2672R
C3072R
C3672R
C4872R
AWG #12
Max. length 76 ft.
AWG #10
Max. length 99 ft.
AWG #10
Max. length 99 ft.
AWG #10
Max. length 81 ft.
Trade Size
of Conduit
3/4 in.
3/4 in.
3/4 in.
MOP
(Fuse or HACR
type circuit breaker)
30 A
35 A (230/208 V)
35 A (230/208 V)
Power Supply Terminal Base
Capacity Max. Wire Diameter
50 A
50 A
50 A
3/4 in.1-1/4 in.50 AAWG #640 A
Trade Size
of Conduit
type circuit breaker)
3/4 in.
3/4 in.
3/4 in.
3/4 in.1-1/4 in.50 AAWG #6
MOP
(Fuse or HACR
25 A
30 A (230/208 V)
30 A (230/208 V)
35 A
Power Supply Terminal Base
Capacity Max. Wire Diameter
50 A
50 A
50 A
* AWG = American Wire Gauge
AWG #6
AWG #6
AWG #6
AWG #6
AWG #6
AWG #6
Trade Size
of Conduit
1-1/4 in.
1-1/4 in.
1-1/4 in.
Trade Size
of Conduit
1-1/4 in.
1-1/4 in.
1-1/4 in.
57
Page 58
g
Indoor Unit
MOP
(Fuse or HACR
Type
(B) Power Supply
AWG #14
Trade Size
of Conduit
type circuit breaker)
3/4 in.15 AMax. length 67 ft.X, K, T, U
Control Wiring
(C) Inter-Unit Control Wiring(D) Remote Control Wiring
AWG #18
Use high voltage wire (300 V)
*1
AWG #18
*2
(0.75 mm2)
Max. 1,650 ft.Max. 3,300 ft.Max. 1,650
5-3. Wiring System Diagrams
Basic wiring diagram for standard control
Indoor
Power supply
208 / 230 V, 60 Hz
Remote
controller
1
WHT
2
BLK
1
2
L1
L2
Ground
D
unit
1
2
B
U1
U2
C
Ground
(E) Control Wiring For Group Control
*2 –
(0.75 mm2)
– ft. (Total)
With ring-type wire terminal.
Wire joint connection.
L1
Power supply
L2
208 / 230 V, 60Hz
Outdoor unit
INV unit
L1
L2
1
2
AWG #18
*1
*2
A
NOTE
(1) Refer to Section 5-2. Recommended Wire Length
and Wire Diameter for Power Supply System for
the explanation of “A”, “B”, “C”, “D”, and “E”, in the
above diagrams.
(2) Inter-Unit Control Wiring (C) and remote control-
ler wiring (D), (E) have no polarity. But for other
wiring, respect polarity. Be sure to connect as
shown in the Wiring System Diagram.
CH Type
5P terminal board
L1 L21 2
Inter-unit
power wiring
X, T, U Type
5P terminal board
12
Inter-unit
power wiring
K Type
4P terminal board
U1 U2
Inter-unit
control wiring
Inter-unit
control wiring
U1
U2
Inter-unit
control wiring
12
Inter-unit
power wiring
Remote
controller wiring
Remote
controller wirin
58
Page 59
Loose wiring may cause the
WARNING
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.
Stranded wire
.ni 8/3 pirtS
Ring
pressure
terminal
Fig. 5-1
5-4. How to Connect Wiring to the 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. 5-1)
(2) Using a Phillips head screwdriver, remove the ter-
minal screw(s) on the terminal plate.
(3) Using a ring connector fastener or pliers, securely
clamp each stripped wire end with a ring pressure
terminal. (Fig. 5-1)
(4) Place the ring pressure terminal, and replace and
tighten the removed terminal screw using a
screwdriver. (Fig. 5-2)
Special
washer
Wire
Screw
Ring pressure
terminal
Terminal plate
Fig. 5-2
Wire
Screw and
Special washer
Ring
pressure
terminal
59
Page 60
6. HOW TO INSTALL THE WIRED REMOTE CONTROLLER
(OPTIONAL PART)
RC
(WD)
6-1. Installation Site Selection
Install the remote controller at a height of between
3–5 ft. above the floor.
Do not install the remote controller in a place where
it will be exposed to direct sunlight or near a
window or other place where it will be exposed to
the outside air.
Be sure to install the remote controller vertically,
such as on a wall.
The mounting position for the remote controller
should be located in an accessible place for control.
Never cover the remote controller or recess it into
the wall.
Drainage Work
When mounting the remote controller on a wall,
refer to Figs. 6-1 and 6-2.
Wall
Hole for routing
remote control
cable
JIS C8340
1 switchbox
(no cover)
Wall
3-21/32 in. or more
(from wall)
Spacer
3-17/32 in. or more
(from wall)
Spacer
3-17/32 in. or more
(from wall)
4-29/32 in. or more
(when continuous
installation)
4-29/32 in. or more
(when continuous
installation)
Fig. 6-1
4-29/32 in. or more
(when continuous
installation)
Hole for routing
remote control
cable
JIS CB8340
2 switchboxes
(no cover)
Fig. 6-2
60
Page 61
6-2. Wired Remote Controller Installation
Do not supply power to the unit or try
WARNING
to operate it until the tubing and wiring
to the outdoor unit are completed.
Do not twist the control wiring with the
CAUTION
power wiring or run it in the same
metal conduit, because this may cause
malfunction.
Install the remote controller away from
sources of electrical noise.
Install a noise filter or take other
appropriate action if electrical noise
affects the power supply circuit of the
unit.
If local electrical codes allow, this
remote controller can be mounted
using a conventional wall box for flush
mounting.
(1) When you open the decorative cover, you will see
two gaps under the remote controller. Insert a coin
into these gaps and pry off the back case.
(Fig. 6-4)
(2) Attach the back case with the 2 small screws
provided. Using a screwdriver, push open the cutouts on the back case. These holes are for screws.
Use the spacers and take care not to tighten the
screws excessively. If the back case will not seat
well, cut the spacers to a suitable thickness.
(Fig. 6-3)
(3) Connect the remote controller wiring (2 wires) cor-
rectly to the corresponding terminals in the
electrical component box of the indoor unit.
When wiring, do not connect
CAUTION
the remote controller wires to
the adjacent terminal block for
the power wiring. Otherwise,
the unit will break down.
Wired remote
controller
M4 × 25
Screws (2)
Decorative
cover
Control panel
Gap
Coin
Concealed box for 1
Spacer
RC
(WD)
Under case
(Back case)
Fig. 6-3
Gap
(4) To finish, fit the back tabs of the case into the
remote controller and mount it.
Fig. 6-4
61
Page 62
6-3. Basic Wiring Diagram
RC
(WD)
CAUTION
Carry out wiring correctly
(incorrect wiring will damage
the equipment).
Use shielded wires for inter-unit control wiring and
ground the shield on both sides. (Fig. 6-5)
Otherwise misoperation because of noise may occur.
Wiring procedure
Install the wiring according to the above wiring diagram.
Address setting is automatically executed after turn-
ing on the system.
An indoor unit address is assigned to each indoor
unit.
Operation takes place successively at intervals of 1
second, by using combinations of the address setting
of each unit.
Shielded wire
Ground
Fig. 6-5
Diagram of outer dimensions
2
3
5/32
4-23/32
/
3
Ground
23/3
24
5/8
62
Page 63
6-4. Wiring System Diagram for Group Control
This diagram shows when several units (maximum
of 8) are controlled by a remote controller (main
unit).
In this case, a remote controller can be connected
at any indoor unit.
Wiring procedure
Wire according to the diagram at right:
Address setting is executed automatically when
the outdoor unit is turned on.
Group control using 2 remote controllers
It does not matter which of the 2 remote controllers
you set as the main controller.
When using multiple remote controllers (up to 2 of
them can be used), one is the main remote
controller and the other is the sub-remote
controller.
To set up a sub-remote controller, change its
remote control address connector (RCU. ADR)
located on its PCB from main to sub position
(main: when shipped from factory).
Remote
controller
(main)
Wire joint
Indoor unit
12
1
No. 1
1
Inter-unit
control
wiring
Connection wiring
for group control
2
2
Wire joint
1
2
Indoor unit
No. 2
1
2
Remote
controller
1
2
1
2
Indoor unit
No. 1
1
2
1
2
Outdoor unit
Indoor unit
(sub)
12
1
No. 3
1
2
2
: Ground (earth)
1
2
Indoor unit
No. 8
1
2
RC
(WD)
63
1
2
Outdoor unit
1
2
Outdoor unit
1
2
Outdoor unit
1
2
Outdoor unit
: Ground (earth)
Page 64
6-5. Wiring System Diagram for Multiple Remote
Controllers
When Installing Multiple Remote Controllers
RC
(WD)
This multiple remote controller system is used for
operating the unit(s) at different positions. (A maximum
of 2 remote controllers can be installed.)
Setting method
To execute this control, make the setting according
to the following procedure.
(1) Of the 2 installed remote controllers, make 1 the
main remote controller (factory-shipped state).
(2) On the other remote controller, change the address
connector on the PCB from main to sub position.
In this state, it functions as a sub-remote controller.
Basic wiring diagram
Install wiring correctly
CAUTION
(incorrect wiring will damage
the equipment).
To operate 1 indoor unit with 2 remote controllers set
at different places.
Remote controllerRemote controller
address connector
Main
RCU check
Sub
RCU. ADR
6-6. How to Switch the Indoor Temperature Sensor
The indoor unit and the remote controller both contain
an indoor temperature sensor. The sensors on either
unit can be used but normally only the sensor set on
the indoor unit is used. However, use the following
procedure if you must use the sensor on the remote
controller.
(1) Press and hold the + + buttons for
at least 4 seconds.
Note: The Unit No. first displayed is the main
indoor unit address for group control.
Note: Do not press the button.
(2) Select CODE NO. 32 with the Temp. setting ()
/buttons.
(3) Change the set data from 0000 to 0001 with the
Timer () /buttons.
(4) Press the button. (Setting is OK if the blinking
display changes to a lit up display.)
(5) This is the usual off condition. At this time,
(remote controller) appears on the LCD display.
(sub)(main)
(Option)
1
2
Remote control
cable terminal
board
Earth
1
2
1
2
Indoor unit
Remote control cable
(wire it at the
installationsite)
NOTE
*1If using 2 remote controllers, either one (main or
sub-remote controller) can be used to make settings
but only the main unit functions as the remote
controller sensor.
*2The remote controller sensor will not function during
group control unless the group address is set in the
main remote controller indoor unit.
*3Do not use the remote controller switch for the
remote control sensor if the remote sensor is being
used jointly with the remote controller switch.
64
Page 65
6-7. Trouble Diagnostics
(1) Contents of remote controller switch alarm display
Possible cause of malfunction
Serial communication errors
Mis-setting
Remote controller is
detecting error signal from
indoor unit
Indoor unit is detecting error signal from remote controller (and system controller)
Improper setting of indoor
unit or remote controller
Indoor unit is detecting error
signaled from signal option
Setting error
Indoor unit is detecting error
signaled from outdoor unit
Outdoor unit is detecting
error signaled from indoor
unit
Automatic addresssetting
failed
Error in receivingserial communication signal
(Signal from main indoor unit in case of
Outdoor system address, indoor system address, or indoor unit
individual/main/sub setting isnot set
(Automatic addresssetting is not completed)
Auto address isnot completed
Error in transmittingserial communication signal
Indoor unit addre
Remote controller setting is duplicated
Error in transmittingserial communicationssignal
Error in receivingserial communicationssignal
Main unit duplication in simultaneous-operation multi control
(detected by outdoor unit)
Error in receivingserial communicationssignal
Error in transmittingserial communicationssignal
Error in receivingserial communicationssignal (includingunit
quantity verification failure)
Error in transmittingserial communicationssignal
Indoor unit capacity too low
Indoor unit capacity too high
ss setting is duplicated
group control)
ON:
Blinking:OFF:
Wired
remote
control
display
Wireless
remote controller
receiver display
Operation
E01
E02
E03
E08
E09
E10
E11
E14
E04
E05
E06
E07
E15
E16
Timer
Standby
RC
(WD)
An indoor unit detected
trouble in the signal from
another in
door unit
Communications trouble
between units
Setting errorMis-setting
No indoor units connected
Error in transmitti
ngserial communicationssignal
Error in receivingserial communicationssignal
Communications failure with MDC
Indoor unit group settings error
Indoor/outdoor unit type mismatch
Main unit duplication in group control (detected by indoor
Outdoor unit address duplication (system address)
Group wiring connected for independent indoor unit
Addressnot set or group not set
Indoor unit capacity not set
Outdoor unit capacity not set or setting error
Miswiring in group control wiring
Indoor unit type setting error (capacity)
unit)
E20
E17
E18
E31
L01
L02
L03
L04
L07
L08
L09
L10
L11
L13
Simultaneously
Simultaneously
Simultaneously
Simultaneously
Continued
65
Page 66
RC
(WD)
Ceiling panel connection failure
Activation of
Indoor protection
protective
device
Outdoor protection
Thermistor
ult
fa
Thermistor open circuit
• Short circuit (indoor)
Thermistor open circuit
• Short circuit (outdoor)
Possible cause of malfunction
Fan protective thermostat
Float switch
Discharge temperature trouble
High pressure switch or compressor motor thermal protector is activated.
Open phase detected, AC power trouble
No gas
4-way valve locked
High cooling load
Outdoor fan trouble
Inverter compressor trouble (HIC PCB)
Inverter compressor trouble (MDC)
Simultaneous-operation multi control trouble
Compressor current failure (overload)
Indoor heat exchanger temperature
Indoor heat exchanger temperature sensor (E2)
Indoor temperature sensor
Discharge temperature (TD)
Outdoor heat exchanger temperature (C1)
Outdoor heat exchanger temperature (C2)
Outdoor air temperature (TO)
Intake temperature (TS)
Indoor EEPROM error
Outdoor EEPROM error
sensor (E1)
Wired
remote
control
display
P09
P01
P10
P03
P04
P05
P15
P19
P20
P22
P26
P29
P31
H01
F01
F02
F10
F04
F06
F07
F08
F12
F29
F31
Wireless
remote controller
receiver display
Operation
Timer
Standby
Alternately
Alternately
Alter.
Alter.
Simul.
Simul.
66
Page 67
(2) LED Indicator Messages on Outdoor Control PCB
Power ON sequence
1. No communication from indoor units in system
2. Communication received from 1 or more indoor units in system
3. Regular communication OK (Capacity and unit quantity match)
LED 1LED 2Remarks
If it is not possible to
advance to 3, repeats 1 → 2.
At 3, changes to normal
control.
Normal operation
EEPROM error (F31)
Pre-trip (insufficient gas)
Pre-trip (P20)
Pre-trip (other)
Alarm
Insufficient gas indicator
Refrigerant recovery mode
Automatic address setting
Automatic address setting in progress
Automatic address setting alarm (E15)
Automatic address setting alarm (E20)
Displayed during automatic
address setting 1 and initial
communication. After these are
completed, alarm F31 is displayed.
(0.25/0.75)
(0.75/0.25)
Alternate blinking during alarms
LED 1 blinks M times, then LED 2 blinks N times.
The cycle then repeats.
M = 2: P alarm
N = Alarm No.
* Refer to
(0.25/0.75)
(0.75/0.25)
3: H alarm 4: E alarm 5: F alarm
“1. Examples of alarm display” below.
(0.25/0.75)
(0.75/0.25)
P03
6: L alarm
Blinking alternately
Blinking simultaneously
Blinking simultaneously
RC
(WD)
Automatic address setting alarm (Other than E15 and E20)
:
ON
:
Blinking (0.25/0.75) indicates that the lamp illuminates for 0.25 seconds, and then is OFF for 0.75 seconds.
Unless otherwise indicated, the blinking is (0.5/0.5).
:
OFF
(3) Examples of alarm display (other than E15, E16, and E20)
Alarm / DisplayLED 1Alternately
P03
P04
P05
P31
H01
H02
H03
•
E04
•
F07
•
L13
•
( Blinks 2 times )
→
)
(
"
)
(
"
)
(
"
(Blinks 3 times)
)
(
"
)
(
"
•
(Blinks 4 times)
•
(Blinks 5 times)
3
(Blinks 6 times)
•
LED 2
→
(Blinks 3 times)
(Blinks 4 times)
(Blinks 5 times)
(Blinks 31 times)
(Blinks 1 times)
(Blinks 2 times)
(Blinks 3 times)
(Blinks 4 times)
(Blinks 7 times)
(Blinks 13 times)
67
Blinking simultaneously
Note:
This table shows example alarms. Other alarms
may also be displayed.
Page 68
7. HOW TO INSTALL THE WIRELESS REMOTE CONTROLLER
(OPTIONAL PART)
IMPORTANT
Whenusing this air conditioner with the wireless
remote controller it may sometimes be
impossible to change the operation modes while
other indoor unit is running.
When this happens, a double beep tone sounds,
the (operation lamp) lightsup, and the (Timer
lamp) and (Standby lamp) blink alternately.
Operation is the same even during (AUTO mode)
automatic cooling or heating.
A beep tone sounds 5 times and no changes can
be made when any of the ON/OFF, MODE, Temperature setting buttons were pressed while set
under central control by the system controller.
7-1. Wireless Remote Controller Installation
The remote controller can be operated from either a
non-fixed position or a wall-mounted position.
RC
(WL)
To ensure that the air conditio
ner operates correctly,
do not install the remote controller 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.
(1)If Wall-mounted Fixed Position
Install the remote controller at a convenient
location on a nearby wall. However, before
attaching the remote controller mounting cradle,
check that the remote controller can operate from
the desired wall pos
ition. (Fig. 7-1)
How to Install Batteries
See Fig. 7-2.
(1)Press and slide the lid on the back of the remote
controller in the direction of the arrow.
Screws for fixture
Truss-head
tapping screws
(4 × L5/8")
Put on
1
2
Fig. 7-1
Mounting cradle
Push
(2)Install two AAA alkaline batteries. Make sure the
batteries point in the direction marked in the
battery compartment.
(3)Press the ACL button, then replace the lid. If you
press it, the current time, ON time, and OFF time
are all reset to 0:00.
68
Cover
Fig. 7-2
ACL button
Page 69
7-2. Room Temperature Sensor Setting
The room temperature sensors are built into the indoor
unit and the wireless remote controller. Either of these
room temperature sensors can operate.
The system isshipped from the factory set to the
indoor unit sensor. To switch to the remote controller
sensor, press the sensor switching button located
inside the remote controller cover and check that A/C
SENSOR on the LCD display panel goes out.
NOTE
If the sensor switch is set to the remote controller side,
but no room temperature data issent to the mainunit
for 10 minutes, the sensor is automatically switched to
the indoor unit side. As much as possible, install the
remote controller facing the unit.
7-3. AddressSwitches
If you are installing more than 1 indoor unit (up to 6) in
the same room, it isnecessary for you to assign each
unit its own addressso they each can be operated by
their remote controller.
Up to 6 indoor units can be controlled separately
through the addressswitches. The operating control
has the reception addressswitch and the remote
controller has the transmission addressswitch. This
function isutilized by matching the transmission and
reception addressswitches.
SET
CL
ACL
Sensor button
Fig. 7-3
ADR
SENSOR
Remote controller
address display
Addressswitch
positions
ADR
*Any address
switch position
available
ADR
1 2 3
456
ADR
1 2 3
456
ADR
1 2 3
456
7-4. Setting the Model Code
Flap display selector switch
1
Make the slide switch settings in the battery compartment box of the remote controller depending on the type
of indoor unit in which the wireless receivingunit isused.
2
Operation mode switch
In thisSplit System Air Conditioner set the switch to “A”.
* The switch is factory set to “S” / “A”.
* Always press the reset button after switching the setting.
S KNAHC
Fig. 7-4
Operation
2
mode switch
Flap display
1
selector switch
1
S KN
X, T typeK type
AHC
2
Heat pump with
Auto mode (CH type)
Heat pump without
S KNS KN
AHC
Cooling only
Auto mode
U type
AHC
RC
(WL)
69
Page 70
<RCS-SH80UA.WL>
4-Way Air Discharge Semi-concealed Type
(X Type)
7-5. Indicator Section Installation
X
Remove the ceilingpanel and indicator cover
Air intake grille
Mark section
(indicator section)
and install the indicator section.
(1)Remove the ceiling panel.
(2)Remove the corner cover behind the mark sec-
Ceiling panel
tion. (3screws)
(3)Remove the mark section inside the ceiling panel.
(2 screws)
(4)Install the indicator section in the location where
the mark section was attached. (2 screws)
(5)Form the wire to match the panel ribs asshown
3screws
Corner cover
in Fig. 7-6.
(6)Install the corner cover. (Restrain the wire with
the corner cover.)
Fig. 7-5
7-6. Operating Controller Installation
Pass the wiring through under the shaft.
CAUTION
Do not twist the operating
controller wires together
with the power supply
wires. Doingso can result
in malfunction.
If electrical noise is induced
in the unit power supply,
take appropriate measures,
for example installing a
Wiring
noise filter.
Install the operating controller at the indoor unit intake
section.
port
(1)Fasten the operating controller to the indoor unit
intake port section (electrical component box
2 screws
Indicator section
Fig. 7-6
opposite side) with the 2 accessory screws
(4 × L13/32 in.).
(2)Connect the operating controller 2 wires (WHT,
BLK) to the remote control wire (WHT) in the
electrical component box. (For details on
wiring, see “7-9. Electrical wiring” on page 72.)
(3)Install the ceiling panel.
(4)Connect the indicator section and the operating
controller with the 6P connector (white).
(5)Form the wires with vinyl clamps and fasten.
(6)Connect the ceiling panel wiring connector (2P,
3P) to the body connector in the electrical compo-
nent box.
(7)For details on test operation, see “Test Run.”
70
Operating
controller
Screws
Electrical
component box
Fig. 7-7
Page 71
Ceiling-Mounted Type (T Type)
7-7. Indicator Section Installation
Remove the side panel to install the indicator section.
(Fig. 7-8)
(1)Remove the side panel.
Open the air intake grille, remove the screw at
one place and then remove the side panel by
sliding it toward the front (arrow direction).
(2)Remove cover A and cover B.
Insert a standard screwdriver into the recess
of cover A to remove cover A and cover B.
(When removing the cover, take care not to
scratch the panel.)
(3)Remove cover B from cover A.
(4)Install the indicator section at cover A.
(5)After passing through the lead wires, install cover
A and the indicator section at the panel hole.
(The protrusion part of cover A is fixed with the
panel hole.)
(6)Bundle the lead wires along with the wiring of the
louver motor.
(7)Install the side panel.
Indicator section
Cover B
(Not used when
the indicator section
is installed.)
Recess
Cover A
Recess
Fig. 7-8
PanelIndicator section
Cover A
Side panel
Air intake grille
T
7-8. Operating Controller Installation
Do not twist the operating
CAUTION
controller wires together
with the power supply
wires. Doingso can result
in malfunction.
If electrical noise is
induced in the unit power
supply, take appropriate
measures, for example
installing a noise filter.
Install the operating controller on the top face of the air
intake section (space between the fan motor and the
electrical component box). (Fig. 7-9)
(1)Fasten the operati
ng controller to the ceiling
panel of the air intake section with the 2 supplied
screws (4 × L13/32 in.).
(2)Draw the lead wires into the electrical component
box and connect the operating controller 2 wires
(WHT, BLK) to the remote control wires in the
electrical component box.
(3)Connect the indicator section and the operating
controller using the 6P connector in the electrical
component box.
Operating controller
Electrical component box
Fig. 7-9
71
Page 72
RC
(WL)
7-9. Electrical Wiring
Indoor PCBOperating controller
CN1
WL
1
2
W1 (4.3 ft.)
WHT
BLK
Signal receivingunit
W2
(0.7 ft.)W3(4.3 ft.)
CN2
BLU
YEL
PNK
RED
GRY
BLK
Connection method
(1)Connect W1 to the indoor PCB WL connector.
(2)Connect W3 from the indicator section with W2
from the operating controller using the relay
connector.
7-10. Test Run Switch
The test runswitch is located in the operating control unit.
Regarding the test run, refer to section 11. Test Run.
7-10-1. How to use the test run setting (X, T Types)
Set DIP switch [DS] No. 1 on the wireless receiver
(1)
unit PCB from OFF to the ON position.
Press the ON/OFF operation button on the
(2)
wireless remote controller.
Make a test runusing the air conditioner in
(3)
COOL or HEAT mode.
During the test run, each of the 3 indicator lamps
(4)
on the indoor unit flash.
During the test run, the air conditioner runs
(5)
continuously and the thermo
stat doesnot control
the system.
After the test run, be sure to reset DIP switch No. 1
(6)
back to the OFF position and check that no indicator
lamps are blinking.
(This receiver includes a 60-minute automatic OFF
timer function in order to prevent continuous test run.)
BLU
YEL
PNK
RED
GRY
BLK
Relay connector
Fi
g. 7-10
1.TEST RUN
2.PCB CHK.
3.RCU: MAIN
RCU: SUB
4.NORMAL
ALL •
DIP switch
No. 1
Indicator section
CN1
All OFF( ) for
initial settings.
1
2 3 4
ADR
1
2 3
456
Addressswitch
Fig. 7-11
Flap
button
ON/OFF
operation
button
NOTE
In case of 4-way air discharge type, test run
To protect the air conditioner from overloading, the outdoor unit will not start running for 3 minutes after
power is applied or the air conditioner is turned off and then back on.
When the air conditioner fails to start the test run, 1 or more of the 3 alarm indicator lamps on the indoor
unit will flash (See next section).
When the DIP switch isset to “TEST – ON,” temperature control from the wireless remote controller is disabled.
Do not use thissetting at any time other than for the test run. Doingso will place an excessive load on the system.
To avoid placing an excessive load on the equipment, use this function only when conducting the test run.
operation isnot possible without the ceiling panel installation.
72
Page 73
7-11. Misoperation Alarm Indicators
Alarm indicator lamps on the indoor unit indicate the
error cause if the air conditioner fails to operateupon beingswitched on. The possible alarm indications are given in Table 7-1. Fig. 7-12 shows the
location of the alarm lamps on the indoor unit.
(See Table 7-1 and Fig. 7-12.)
Table 7-1
Alarm
(OPERATION
lamp)lamp)lamp)
(TIMER
(STANDBY
S.C. errors* between the indoor unit’s controller (PCB) and the remote
controller.
Compressor protector is working.
S.C. errors between indoor and outdoor units.
Indoor or outdoor thermistor is malfunctioning.
Outdoor unit protector is working.
Indoor unit protector is working.
TEST RUN switch on the operation controller is in ON state.
*S.C.: Serial communications
Cause of Trouble
OPERATION
lamp
TIMER
lamp
STANDBY
lamp
Fig. 7-12
NOTE
Stick the alarm message label accompanying the
wireless remote controller on the electrical component
box to indicate the cause of trouble for future reference.
RC
(WL)
Remote control
receiver
73
Page 74
<RCS-BH80UA.WL>
CAUTION
If the signal receiving unit
is installed near a rapidstart or inverter type
fluorescent lamp (neither
one usesglow lamps),
it may be impossible to
receive signals from the
wireless remote controller. To avoid signal interference from fluorescent
lamps, install the receiving unit at least 6.6 ft.
away from the lamps and
install at a location where
wireless remote controller
signals can be received
when the fluorescent
lamps are on.
RC
(WL)
7-12.
Separate Type Signal Receiving Unit Installation
Do not twist the operating
CAUTION
controller wires together
with the power supply
wires. Doingso can result
in malfunction.
If electrical noise is induced
in the unit power supply,
take appropriate measures,
for example installing a
noise filter.
If local electrical codes allow, this signal receving
unit can be mounted using a conventional wall box
for flush mounting.
(1)Insert a standard s
crewdriver into the gap under
the signal recevingunit and pry off the cover (Fig. 7-14)
(2)Attach the signal recevingunit with the 2 small
screws provided.
Use the spacers and take care not to tighten the
screws excessively.
If the signal recevingunit will not seat well, cut
the spacers to a suitable thickness. (Fig. 7-13)
(3)Connect the signal receving unit wiring (2 wire
correctly to the corresponding terminals in the
electrical component box of the indoor unit.
s)
Notch
M4 × L1 inScrews (2)
Cover plate
Signal receiving unit
Spacer
A
L
L
•
R
C
U
:
S
U
B
CP
B
C
H
K
.
T
E
S
T
R
U
N
R
C
U
:
M
A
I
N
N
RO
AM
L
1
2
3
A
D
R
4
5
6
Fig. 7-13
Fig. 7-14
Switch box (no cover)
When wiring, do not connect the signal receiving unit
CAUTION
wires to the adjacent terminal block for the power
wiring. Otherwise, the unit will break down.
74
Page 75
Whenusing the signal receivingunit on a wall with
the front exposed, choose a wall surface that the
signal receivingunit can be mounted on.
(1)Insert a standard (minus) screwdriver into the slot on
the lower side of the signal receivingunit and pry
off the back case asshown in Fig. 7-14.
(2)The wire routing at the signal receivingunit
comes out of the u
pper case (thin portion at
upper center) so use nippers or a similar tool to
cut out a notch beforehand large enough for the
remote control cable (option) to pass through asshown in Fig. 7-15.
(3)Remove the wire, which is connected prior to ship-
ping, from the connector.
Connect the remote control cable (option) to the
(4)
signal receivingunit connector asshown in Fig. 7-16
after the clamp (supplied) with the unit is installed.
(5)After arranging the wiring on the printed circuit
board asshown in Fig. 7-17 so that it is contained
within the signal receivingunit, attach the back
case. At this time, arrange so that the head of the
clamp faces the side.
(6)Remove the cover plate and install the signal
receivingunit using the 2 wood screws.
(7)Fasten to the wall using the cord clip (supplied).
(8)Reinstall the cover plate.
To use the signal receivingunit while mounted on the
ceiling, install by using the carrier for ceiling installationsupplied with the unit.
(1)Remove the cover plate by inserting a standard
(minus) screwdriver into the notch in the lower
section and prying it off.
(2)Cut out a section (3-3/4 × 2-1/32 in.) on the
ceilingusing the paper pattern (supplied) as a
guide.
(3)
Run the wire through the mounting carrier and insert
into the installation hole asshown in Fig. 7-19.
(4)Fit securely into the ceiling material at sections
(A) and (B) asshown in Fig. 7-20.
(5)Connect the wire (2-wire core) from the signal
receivingunit with the wire from the indoor unit.
(See section on how to wire the receivingunit.) asshown in Fig. 7-20.
(6)Use the supplied spacers to adjust for a thickness
several inches more than the ceiling material and
lightly fasten the receivingunit in place with the
small screws (M4 × 1-9/16 in., 2 pcs.) supplied
with the unit.
(7)Tighten the machine screws after fittingsections
(A) and (B) into the openings, in the gap between
the signal receivingunit and ceilingsurface as in
Fig. 7-21. Do not apply strong force when tightening the screws. Excessive force might warp or
damage the cover. When finished, the signal
receivingunit should still be able to move slightly
when pressed asshown in Fig. 7-21.
(8)Reinstall the cover plate.
Run the remote control
cable through a notch
in the upper case.
Remote control cord (Option)
Clamp
Fig. 7-17
Fig. 7-19
Fig. 7-21
About 3/32-1/8 in.
Connector
Fig. 7-16Fig. 7-15
Wood screws (2)
Clamp (Supplied)
Remote control cord
(Option)
Signal receivingunit
A
L
L
•
R
C
U
:
S
U
B
P
C
B
C
H
K
.
ET
S
T
R
NU
R
C
U
:
AM
I
N
N
RO
M
A
L
12
3
A
D
R
4
65
Fig. 7-18
A
B
Fig. 7-20
RC
(WL)
75
Page 76
7-13. Electrical Wiring
Be sure to do the wiring
CAUTION
correctly (incorrect
wiring will damage the
equipment).
Recommended wire diameter and allowable length
for signal receivingunit wiring and its branch wiring:
AWG #18, MAX 1,300 ft.
RC
(WL)
Terminal board
for indoor unit
remote controller
wiring
Wire joint (2 pcs.
white, supplied)
1
2
Signal receiving unit wiring (field supply)
Signal receiving
unit wiring
WHT
1
BLK2
Wire from signal receivingunit
Connection
1. Peel away 9/16 in. of shield from the wire
for the connection.
Join the 2 wires asshown and crimp-connect
2.
them with the wire joint (supplied).
Signal receiving
unit wiring
Wire joint CE-1
(supplied)
3. When no crimping tool is available or if a
solder connection was made, then coverwith insulating tape.
7-14. Test Run Switch
(1)
Remove the cover plate of the signal receivingunit.
Set the "TEST RUN" switch of the dip switches to
the ON position.
(2)Press the ON/OFF operation button on the
wireless remote controller.
To avoid placing an
CAUTION
excessive load on the
equipment, use this
function only when
conducting the test run.
Signal receiving
unit
ALL•
RCU : SUB
PCB CHK.
TEST RUN
ALL•
RCU : SUB
PCB CHK.
TEST RUN
RCU : MAIN
NORMAL
12 3
ADR
4
56
(3)Make a test runusing the air conditioner in
COOL or HEAT mode.
(4)During the test run, the “OPER.,” “TIMER,”
and “STDBY” LED all blink.
To protect the air conditioner from overloading, the outdoor unit will not start running for approximately 3 minutes
after power is applied or the air conditioner is turned off and then back on.
When the DIP switch isset to “TEST – ON,” temperature control from the wireless remote controller is disabled.
Do not use thissetting at any time other than for the test run. Doingso will place an excessive load on the system.
(5)After the test run, press the ON/OFF operation button on the wireless remote controller. Then, set the
TEST RUN switch back to the OFF position to cancel the test run mode.
(This receiver includes a 60-minute automatic OFF timer function in order to prevent continuous test run.)
Fig. 7-22
76
Page 77
7-15. Misoperation Alarm Indicators
A blinking lamp for other than the signal receivingunit
filter shows that a problem has occurred in the unit, so
make an inspection. (Refer to servicing information in
the service manual, etc.) Also, if wired remote controller and dedicated service check lines (854-9-9536044-97: service use) are available, then detailed error
information can be obtained by connecting to the
service connector ass
hown in the drawing. For
information on how to connect to the signal receivingunit, refer to the instruction manual that came with the
dedicated service check lines.
Table 7-2
Lamp
OPERATION
TIMERSTANDBY
BrightCause of Trouble
lamplamplamp
AlternatelyIndoor unit protector is activated.
AlternatelyOutdoor unit protector is activated.
ConcurrentMi
ConcurrentMis-setting of outdoor unit.
*S.C.: Serial communications
Service
connector
ALL•
RCU : SUB
PCB CHK.
TEST RUN
RCU : MAIN
NORMAL
Fig. 7-23
OPERATION lamp
TIMER lamp
STANDBY lamp
FILTER lamp
Fig. 7-24
No power supply or mis-wiring of signal receiving unit.
S.C.* errors between the indoor unit’s controller (PCB) and
signal receiving unit.
S.C. errors between indoor and outdoor units.
Compressor protector is activated.
s-setting of indoor unit.
RC
(WL)
77
Page 78
7-16. Basic Wiring Diagram
CAUTION
Wire joint
Inter-unit
control
wiring
Wiringprocedure
Be sure to do the wiring
correctly (incorrect wiring
will damage the equipment).
Remote
controller
1
2
1
2
Indoor unit
No. 1
1
2
1
2
Outdoor unit
: Ground (earth)
Use shielded wires for inter-unit control wiring and
ground the shield on both sides. (Fig. 7-25)
Otherwise misoperation because of electrical noise
may occur.
Shielded wire
Ground
Ground
Fig. 7-25
RC
(WL)
Carry out the wiring according to the above wiring
diagram.
Addresssetting is automatically executed
after turning on the system.
An indoor unit address is assigned to each
indoor unit.
Operation takes place successively at
intervals of 1 second, by using combinations
of the addresssetting of each unit.
78
Page 79
7-17. WiringSystem Diagram for Group Control
This diagram shows when several units (maximum of
8) are controlled by a signal receiving unit (main
unit). In this case, a signal receiving unit can be
connected at any indoor unit.
Group control using 2 signal receiving units
It doesnot matter which of the 2 signal receivingunits
youset as the main controller.
Remote
controller
(main)
Wire joint
Indoor unit
12
1
No. 1
1
Connection wiring
for group control
2
2
1
2
Indoor unit
No. 2
1
2
(sub)
12
1
2
Indoor unit
No. 3
1
2
1
Indoor unit
No. 8
1
Wiringprocedure
Wire according to the diagram at left:
Addresssetting is executed automatically when the
outdoor unit is turned on.
Each successive unit will respond at one-second
intervals following the order of the group address
when the remote controller is operated.
When using multiple signal receiving units (up to 2
can be used), one is the mainsignal receivingunit and the other is the sub-signal receivingunit.
To set up a sub-signal receiving unit, change its
remote control address connector (RCU. ADR)
located on its PCB from main to sub position
(main: whenshipped from factory).
2
2
RC
(WL)
1
2
Outdoor unit
1
2
Outdoor unit
1
Outdoor unit
1
2
: Ground (earth)
2
Outdoor unit
79
Page 80
7-18. WiringSystem Diagram for Multiple Remote Controllers
When installing multiple remote controllers
This multiple system isused for operating the unit(s) at
different positions. (A maximum of 2 signal receivingunits can be installed.)
Setting method
To execute this control, make the setting according
to the following procedure.
(1)Of the two installed signal receivingunits, make
one the mains
ignal receivingunit (factory-
shipped state).
(2)On the other signal receivingunit, change the
address connector on the PCB from main to sub
position.
In thisstate, it functions as a sub-signal receivingunit.
RC
(WL)
Basic wiring diagram
Carry out the wiring correctly
CAUTION
(incorrect wiring will damage
the equipment).
To operate 1 indoor unit with 2 signal receiving units
set at different locations.
Signal receiving unit
1
2
Remote control
cable terminal
board
Earth
(sub)(main)
(Option)
1
2
1
2
Indoor unit
Connection wiring
80
Page 81
<RCS-SH1UA>
7-19. Test Run Procedure
Wall-mounted model
(For new refrigerant R410A)
Inverter unit (Super Espacio)
Constant-speed unit
Wall-mounted Type
(K Type)
Check the “Check Items Before the Test Run.”
Verify the combination (wiring) of indoor and
outdoor units.
(Item 7-20)
Set the indoor unit controller to “TEST.”
Is operation
NO
possible?
(Item 7-21-3)
Check using the self-diagnostics
function table. (Refer to 11-7)
Correct any locations that require
correction.
YES
Note: Check the indoor-side drainage.
Return the indoor unit controller to
“NORM.” (Item 7-21-3)
7-20. Check Items Before the Test Run
(1)
Turn ON the remote power switch at least 5 hours before the test run in order to charge the crank-case heater.
(If the outdoor unit is an inverter unit, turn ON the power 12 hours in advance.)
(2)Fully open the service valves on the gas-tube and liquid-tube sides.
Set the slidingswitches on the inside of the wireless remote controller cover to the correct settings for that model.
(3)
After changing the settings, press the RESET button.
<For 3072R, 3672R>
Verify that sliding switch 1 is in the “K” position.
Wireless remote controller transmitter
RC
(WL)
S KN
S: Flap model (4-direction, ceiling suspended)
K: Swing-only model (wall-mounted), settings completed
N: No-flap model (built-in)
<For 2672R>
Verify that sliding switch 1 is in the “S” position.
S KN
Set sliding switch 2 to the correct setting for these models.
AHCAHC
A: Heat pump model
(H: Heat pump, no auto heating/cooling)
C: Cooling-only model
Sliding switch 1
81
RESET button
SENSOR button
Sliding switch 2
Page 82
7-21. Preparing for the Test Run
7-21-1. Changing the room temperature sensor
Room temperature sensors are installed inside the indoor unit and the wireless remote controller.
Either room temperature sensor can be used.
When “Unit Sensor” is indicated on the wireless remote controller LCD, the indoor unit sensor is operating
as the room temperature sensor.
To change to the remote controller sensor, open the remote controller cover an
d press the SENSOR button
once. The “Unit Sensor” display disappears, and the remote controller sensor becomes the room temperature
sensor.
If the temperature data from the remote controller is not communicated to the indoor
CAUTION
unit for a period of 10 minutes when the remote controller sensor isselected, the unit
automatically switchesback to the indoor unit sensor.
Install the remote controller in a location where the signal can reliably be received by
the indoor unit.
7-21-2. Using the remote controller
Face the remote controller toward the receiver (indoor unit).
The maximum distance where the remote controller signal can be received is approximately 8 m, however this
distance is only a guide. The actual distance may vary somewhat depending on battery capacity and other
conditions.
Make sure there are no obstructions which can block the signal between the remote controller and the receiver.
When the remote controller signal is received correctly, the indoor unit beeps.
(It beeps twice only when operation is started.)
RC
(WL)
Receiver
Do not drop, throw, or wash the remote controller.
Do not place the remote controller in a location exposed to direct sunlight, or near a stove or similar appliance.
7-21-3. Test run
Using the controller
(1)
Slide the main unit controller switch from “NORM.” to “TEST” (for
3072R, 3672R), “ON” to “TEST” (for 2672R).
(The outdoor unit will not operate for approximately 3 minutes after
the power is turned ON, or after operation isstopped.)
(2)
All indicator lamps on the display blink while test run is in progress.
(3)
Temperature control isnot possible during the test run.
(4)
If normal operation isnot possible, the lamps on the display will indicate the problem.
For 3072R, 3672R
Controller
NORM.
OFFTEST
STDBY
TIMEROPER.
For 2672R
Controller
ON
TEST
Indicator
Refer to the self-diagnostics function table and correct the problem.
(See 11-7. Table of Self-Diagnostics and corrections.)
(5)
After the test run is completed, move the controller switch from “TEST” to “NORM.” (for 3072R, 3672R), “TEST” to
“ON” (for 2672R) and verify that the indicator lampsstop blinking.
(A 60-minute automatic OFF timer function is included in order to prevent continuous test run.)
CAUTION
OFF
STDBYTIMEROPER.
Do not use thissetting at any time other than for the test run. Doingso will place an excessive load on
the system.
Test run is not possible if the power was turned ON when the controller switch was in the “TEST” position.
Leave the power ON and move the switch to “NORM.” or “OFF,” then move the switch back to “TES
T.”
82
Page 83
7-22. Precautions
Request that the customer be present at the time the test run is performed. Explain the Operation Manual to
the customer, and then have the customer actually operate the system.
Be sure to pass the manual and warranty certificate to the customer.
Verify that the AC 208 / 230 V wiring isnot connected to the terminal plate which isused to connect the inter-unit
control wiring.
* If AC 208 / 230 V is accidentally applied to this terminal plate, the fuse (0.5A for both indoor and outdoor units) on
the inter-unit control PCB will be tripped in order to protect the PCB. Correct the wiring connections, then
disconnect the 2P connectors (indoor unit: blu
e, OC, CN40; outdoor unit: blue, OC) which are connected
to the PCB and connect the other 2P connectors (indoor unit: brown, EMG, CN44; outdoor unit: brown, EMG).
(See the figure below.)
If operation isstill not possible with the brown connectors connected, cut the varistor (black) (for both the indoor
and outdoor units).
(Be sure to turn OFF the power before performing this work.)
Indoor unit control PCBOutdoor unit control PCB
<For 3072R, 3672R>
<For 2672R>
VA5 (Varistor, black)
2P connector (brown)
EMG, CN44
2P connector (blue)
OC, CN40
Fuse
0.5A
Fuse
0.5A
2P connector (blue)
2P connector (brown)
Var istor (black)
VA002
CHK (2P plug)
SW103
(Invertor 2, 3 hp)
(Invertor 4, 5, 6 hp)
TEST
OFF
ON
Var istor (black)
Var istor (black)
Fuse
0.5A
Te r mi nal plug (black)
Serial 2 connector (brown)
Serial 1 connector (blue)
Fuse
0.5A
Serial 1 connector (blue)
Serial 2 connector (brown)
RC
(WL)
83
Page 84
8.
HOW TO INSTALL THE SYSTEM CONTROLLER
(OPTIONAL PART)
Do not supply power to the
unit or try to operate it until
the tubing and wiring to the
outdoor unit are completed.
8-1. System Controller Installation
Do not twist the control
CAUTION
wiring with the power
wiring or run it in the
same metal conduit,
because this may cause
malfunction.
Install the system controller away from sources
of electrical noise.
Install a noise filter or
take other appropriate
action if electrical noise
affects the power supply
circuit of the unit.
(1)Remove the flat-top screw on the bottom of the
back case. When you openu
p the decorative
cover, you will see two gapsunder the system
controller. Insert a coin into these gaps and
remove the back case. (Figs. 8-1, 8-2)
System
controller
Coin
M4 × 1-3/16 in.
Screws (2)
Gap
Switch box
(with cover)
Back case
Flat-top
Screw
Fig. 8-1
Gap
SC
(2)Connect the wires to terminal base of the system
controller (see next page).
(3)Attach the back case with the 2 M4 screws
provided.
(4)To finish, fit the back tabs of the back case into
the system controller and mount it using the flattop screw.
Fig. 8-2
84
Page 85
8-2. Electrical Wiring
How to connect electrical wiring
(1)Connect B1, B2 to indoor PCB CRV connector
using accessary 2P connector. (*No polarity)
Total wire length is less than 985 ft. and size is
AWG#18.
(2)Connect B5, B6 to indoor unit 2P terminal base.
(*No polarity). Wire size is AWG#18.
Basic wiring
B1:
B2:
B3:Not be used
B4:Auxiliary of inter-unit control wiring
B5:
B6:
Power supply: DC12V *No polarity
To CRV connector (CN91) on indoor PCB
Inter-unit control wiring. (Low voltage)
To indoor unit 2P terminal base (U1, U2)
*No polarity
Terminals for remote monitoring
A1:Input for turning on air conditioners concurrently.
A2:Input for turning off air conditioners concurrently.
Common input for turning air conditioners on or off.
A3:
B1
B2
B3
B4
B5
B6
System controller
<Back side of system controller>
A1
A2
A3
A4
A5
A6
Accessary connector
Wire joint connection
U1
U2
2P terminal base
Fig. 8-3
Indoor unit PCB
CRV
(CN91: WHT)
Indoor unit
B6
B5
B4
B3
B2
B1
A4:ON operationstate indicator output.
A5:Alarm indicator output.
A6:Common indicator output.
Basic wiring diagram of control wiring
A max. of 64 indoor units and 30 outdoor units
can be connected in 1 system.
Up to 10 system controllers can be connected
in 1 system.
RC1
Inter-unit
control wiring
1-1
Fig. 8-4
RC2RC3
2-13-1
SC
System controller
85
Page 86
8-3. AddressSwitch Setting
SW1
Main/subselection switch
OFF: System controller operates as main controller.
ON: System controller operates assub-controller.
ALL/ZONE mode selection switch
ALL mode:
All indoor units can be controlled by system controller
ZONE 1, 2, 3, 4 mode:
Indoor units in one of zone 1, 2, 3, or 4 can be controlled
by system controller. All indoor units cannot be s
5
4
OFF
ON
ON
ON
ON
ALL mode
ZONE 1 mode
ZONE 2 mode
ZONE 3 mode
ZONE 4 mode
2
OFF
OFF
ON
OFF
ON
3
OFF
OFF
OFF
ON
ON
OFF
et.
Central control/Remote control mode selection switch.
OFF: Central control mode.
Individual setting by remote controller can be inhibited by
system controller.
ON: Remote control mode.
Setting by system controller is inhibited by other central
control equipment.
ON
OFF
1
2 3 4
SW1
5 6 7 8
SC
Central control Main/Subselection switch
(OFF: Main, ON: Sub)
1
When AMY adaptor etc. is
used with system controller,
set the switch to ON position.
2
When only one system controller isused, set the switch to
OFF position.
Except , when multiple system controllers are used,
3
1
set only one system controller to OFF position and others to
ON position.
ALL mode system controller should be in OFF position.
(recommen
ded)
(Central control) button operation switch
OFF: (Central control) button operation is permitted.
ON : button operation is inhibited.
*All switches are in OFF position at shipment.
86
Page 87
SW2
Weekly timer input switches
System controller operation can be set when weekly timer
activates (ON/OFF).
Switch No.
System controller operation
132
Timer OFF→ONTimer ON→OFF
1
2
All ON
No change
Individual control
3
of all indoor units
All OFF
All OFF
All indoor units to
be 1*
1
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
to be permitted
All OFF and all
4
Same as above
Same as above
5
indoor units to be
1
1*
All indoor units to
be 2*
2
ON
OFF
ON
OFF
OFF
ON
All OFF and all
Same as above
6
indoor units to be
2
2*
In case of Remote control mode, use or .
12
ON
OFF
ON
In case of ZONE 1, 2, 3, 4 mode, ALL, all indoor units means
one of ZONE 1, 2, 3, 4.
1
*
: 1 (Central control 1) means ON/OFF operation cannot
be executed by remote controller.
2
*
: 2 (Central control 2) means ON/OFF, MODE change.
Temp. setting cannot be executed by remote controller.
ON
OFF
1
2 3 4
SW2
5 6 7 8
Auxiliary switch
Must be set to OFF position.
Beep tone switch
OFF: Beep tone when each button is pushed.
ON: No tone when each button is pushed.
Indicationswitch
Normally set to OFF position.
Whenset to ON position, indication isnot displayed on LCD
of
system controller.
*All switches are in OFF position at shipment.
SC
87
Page 88
8-4. Mode Setting
According to the function of each system controller, set
SW1 as shown in Fig. 8-5.
(1)Central control/Remote control mode
Central control mode
The system controller isused as the central control
equipment.
Individual setting by remote controller can be
inhibited by the system controller
Remote control mode
The system controller is used as the remote controller.
Setting by system controller is inhibited by other
central control equipment.
(2)ALL/ZONE mode
ALL mode
All indoor units can be controlled by the system
controller.
ZONE mode
Indoor units in one of ZONE 1, 2, 3 or 4 can be
controlled by the system controller
Central control
mode
2
3 4 5 6
ON
OFF
ALL
central control
2
3 4 5 6
ON
OFF
ZONE1
central control
2
3 4 5 6
ON
OFF
ZONE2
central control
2
3 4 5 6
ON
OFF
ZONE3
central control
2
3 4 5 6
ON
OFF
ZONE4
central control
Remote control
mode
2
3 4 5 6
ON
OFF
ALL
remote control
2
3 4 5 6
ON
OFF
ZONE1
remote control
2
3 4 5 6
ON
OFF
ZONE2
remote control
2
3 4 5 6
ON
OFF
ZONE3
remote control
2
3 4 5 6
ON
OFF
ZONE4
remote control
Inter-unit control wiring
1
216
17
1832
33
3448
49
5064
ZONE1
central control
address 1-16
ZONE2
central control
address 17-32
ZONE3
central control
address33-48
ZONE4
central control
address 49-64
SC
(3)The function of the system controller consists of 10 types
according to the combination of central control/remote
co
ntrol mode and ALL/ZONE mode setting asshown
in the table 8-1.
(4)Stick the system controller unit label in a con-
Table 8-1
spicuous position.
ALL1. ALL/Central6. ALL/Remote
ZONE12. ZONE1/Central7. ZONE1/Remote
ZONE23. ZONE2/Central8. ZONE2/Remote
ZONE34. ZONE3/Central9. ZONE3/Remote
ZONE45. ZONE4/Central10. ZONE4/Remote
Fig. 8-5
Central controlRemote control
88
Page 89
8-5. How to Perform Zone Registration
To operate the system controller properly, zone registration is required after finishing the test run (and after
setting all indoor unit addresses) using one of the following methods.
(a) Zone registrationusing the remote controller (RCS-SH80UG)
Refer to page 90.
(b) Zone registrationusing the system controller (SHA-KC64UG)
Refer to page 91.
(c) Automatic zone registrationusing the system controller (SHA-KC64UG)
Refer to page 92.
For methods (a) and (b), youshould make a zone registration table manually before performing the
registration asshown on the next page.
For method (c), zone registration is executed automatically, proceeding from the smallest indoor unit address and
smallest central addresses to larger numbers innumerical order. For example:
Central address123456
ZONE–group1-11-21-31-41-51-6
Indoor unit address1-11-22-12-22-33-1
NOTE
An indoor unit address is assigned to each indoor unit during automatic address
1.
operation. Each indoor unit address combines an R.C. address and indoor unit number
as follows:
: Indoor unit address (UNIT No.)1 – 1
Indoor unit No.
Refrigerant circuit No. (R.C. address)
This address is displayed on the remote controller for UNIT No. when the UNIT
2.
button is pressed.
The central address represents the zone and group number. These addresses are
assigned in ascendingnumerical order.
SC
89
Page 90
(a)Zone registration using the remote controller
(RCS-SH80UG)
(Determination of central address)
In this case, after confirming which indoor unit is
connected to the remote controller and that the air
conditioner in the OFF state, youset the central
addresses one at a time.
If the system hasno remote controller, connect a
remote controller to the system temporarily. Then
follow this procedure.
NOTE
The indoor unit address must already have beenset
before performing zone registration. If necessary, refer
to the Installation Manual supplied with the outdoor
unit.
SC
(1)Press the
and buttons on the remote
controller at the same time for more than
4 seconds.
(2)Do not press buttton.
(3)Once in this mode, the UNIT No., CODE No., No.
of SET DATA and
indications will flash on
the display asshown Fig. 8-6.
NOTE
In case of group control “ALL” instead of “UNIT No.”
will flash on the display. Select the main indoor unit
address by pressing the button once.
(4)Set CODE No. to 03using the and
() buttons.
NOTE
CODE No. 03 must be selected to perform zone
registrationusing the remote controller.
(5)Set the Central address you want to assign
to the indoor unit addressusing the and
Fig. 8-6
() buttons according to the zone
registration table.
(6)Press the button. The CODE No. and Central
address changes from flashing to ON state. If you
make a mistake, press the button and
reset the central address.
(7)Press the
button to finish zone registration.
For example, in this case
Indoor unit address: 1–8
Central address: 17 (Zone 2, Group 1)
Fig. 8-7
90
Page 91
(b) Zone registration using the system controller
(SHA-KC64UG)
In this case, youset all central addresses by
the system controller at once manually.
(1)Press the
and
buttons at the same
ZONE
time for more than 4 seconds.
and CODE No. C1 will flash.
(2)After confirming that CODE No. C1 is displayed,
press the button. Once in this mode, a
change takes place asshown in Fig. 8-8.
(3)Select the zone and group No. you want to
set with
and (GROUP)
ZONE
buttons.
If already set, press the
buttons.
(4)Set the unit No. (indoor unit address) with
and buttons, according to the zone registra-
tion table.
R.C. No. ................... button
Indoor unit No...........
button
If data is
registered
the unit No.
is displayed.
ZONE
SELECT
ZONE
ZONE
ZONE
1
2
9
ZONE
Fig. 8-8
1
2
9
3 4
3 47
6
GROUP
6
If no data is
registeredno number is
displayed.
Selected group
No. if no data is
registered.
(5)Press the button.
GROUP No. turns ON and UNIT No. (indoor unit
address) changes from flashing to ON state.
UNIT No. is registered to the selected ZONE No.
and GROUP No.
If you make a mistake, press the
button
and reselect the ZONE, GROUP and UNIT No.
(6)Register the other UNIT Nos. in the same way by
followingsteps (3) to (5).
(7)Finally, complete the registration by pressing the
button.
flashes for a few minutes, then turns OFF.
SELECT
ZONE
GROUP
For example, in this case
Zone 3, Group No. 7
Unit No. (indoor unit address) 2-8
Unit No. 2-8 is registered to Zone 3, Group 7.
Fig. 8-9
SC
91
Page 92
(c)Automatic zone registration using the system
controller (SHA-KC64UG)
(1)Press the
and buttons at the same
time for more than 4 seconds.
and CODE No. C1 will flash.
(2)Select CODE No. C2 by pressing
and
( ) button and press the button.
C2 changes from flashing to ON state and
automatic zone registration will start.
(3)
Any registered GROUP Nos. will be erased.
(4)Central address will be assigned from the smallest
indoor unit address to larger ones innumerical
order automatically.
On finishing automatic zone registration,
changes from flashing to OFF.
(5)If an error occurs, “CHECK” starts
flashing and zone registration finishes at this
time. Press the button to start over.
(6)Finally, complete automatic zone registration
mode by pressing the button.
flashes for a few minutes, then turns OFF.
Fig. 8-10
SC
92
Page 93
How to check for overlapping of central address Nos.
(1)Press the and buttons at the same
time for more than 4 seconds.
and CODE No. C1 will flash.
(2)Select CODE No. C3 by pressing
,
( ) button and press the button.
C3 changes from flashing to ON state and
will flash. Then auto overlap checking will start.
(3)If C3 changes from ON to flashing and
stops flashing and disappears, there isno overlapping.
Then finally, complete the auto overlap checking
mode by pressing the button.
(4)If some of GROUP No., ZONE No. and UNIT No.
flash, youshould try the zone registration again.
1
Select CODE No. C1 by pressing,
( ) button and press the button.
2
Select the flashing GROUP No. with the ZONE
and GROUP buttons.
Then press the button and reselect the
ZONE, GROUP and UNIT No.
3
Then finally, complete the auto overlap
checking mode by pressing the button.
Fig. 8-11
SC
93
Page 94
ZONE registration table
ZONE GROUP
1
2
3
4
5
6
7
1
8
9
10
11
12
13
14
Central
address
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Indoor unit
address
(UNIT No.)
Unit locationZONE GROUP
1
2
3
4
5
6
7
3
8
9
10
11
12
13
14
Central
address
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Indoor unit
address
(UNIT No.)
Unit location
SC
15
16
1
2
3
4
5
6
7
2
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
4
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
15
16
31
32
NOTE
Assign indoor unit addresses to the desired positions (central addresses)
manually.
2.1.For group control, only the main indoor unit should be assigned.
Sub indoor units cannot be assigned.
94
15
16
63
64
Page 95
8-6. Connection with Other Equipment
meti tuptuo/tupnI
emaNslanimret tupt
ON/OFF output
Alarm output
Potential tree
tuptuo sutatS
A contact, static
(relay output)
Contact capacity
DC 30V, 0.5A
uo/tupni latigiD
All ON input
All OFF input
Pulse (photo
coupler input)
tupni lortnoC
Contact capacity
DC 24V, 10mA
System controllerEquipment
Input/output
ON/OFF
Alarm
Output common
ALL ON (+)
CX
ALL OFF (+)
TX
Input common
8-7. Memory Backup Switch
CPEV
AWG#16
CPEV
AWG#16
tupni latigiD
+24
COM
Input/outputTerminalTerminalExample
Wire length:
less than330 ft.
Pulse width:
more than
84 ft./sec.
9
Wire length:
less than330 ft.
Check the backup switch is ON on the for back side of
the PCB of the system controller.
8-8. Test Run
(1)Power on all indoor units. Next, power on the
system controller.
will flash, checking the indoor unit addresses
automatically.
(2)If group No. displayed onsystem controller isnot the
same as the indoor unit No.* which is connected, see
Fig. 9-5 and carry out setting again.
*In case of group control, mainunit No. only.
FFONO
Back up switch
Back up battery
SC
95
Page 96
9. HOW TO PROCESS TUBING
Deburring
The liquid tubing side is connected by a flare nut, and
the gas tubing side is connected by brazing.
9-1. Connecting the Refrigerant Tubing
Use of the Flaring Method
Many conventional split system air conditioners employ
the flaring method to connect refrigerant tubes which run
between indoor and outdoor units. In this method, the
copper tubes are flared at each end and connected with
flare nuts.
Flaring Procedure with a Flare Tool
(1) Cut the copper tube to the required length with a
tube cutter. It is recommended to cut
approx. 12 – 20 in. longer than the tubing length
you estimate.
(2) Remove burrs at each end of the copper tubing
with a tube reamer or file. This process is important and should be done carefully to make a good
flare. Be sure to keep any contaminants (moisture,
dirt, metal filings, etc.) from entering the tubing.
(Figs. 9-1 and 9-2)
Before
After
Fig. 9-1
Copper
tubing
Reamer
Fig. 9-2
NOTE
When reaming, hold the tube end downward and be
sure that no copper scraps fall into the tube. (Fig. 9-2)
(3) Remove the flare nut from the unit and be sure to
mount it on the copper tube.
(4) Make a flare at the end of the copper tube with a
flare tool.* (Fig. 9-3)
*Use “RIGID
®
” or equivalent.
NOTE
A good flare should have the following characteristics:
inside surface is glossy and smooth
edge is smooth
tapered sides are of uniform length
Flare tool
Fig. 9-3
A
Flare size: A (inch)
Copper tubing
(Outer dia.)
ø1/4
ø3/8
ø1/2
ø5/8
A
– 0.4
23/64
33/64
21/32
25/32
Flare nut
Copper
tubing
0
96
Page 97
Caution Before Connecting Tubes Tightly
(1) Apply a sealing cap or water-proof tape to prevent dust
or water from entering the tubes before they are used.
(2) Be sure to apply refrigerant lubricant to the matching
surfaces of the flare and union before connecting them
together. This is effective for reducing gas leaks.
(Fig. 9-4)
(3) For proper connection, align the union tube and flare
tube straight with each other, then screw on the flare nut
lightly at first to obtain a smooth match. (Fig. 9-5)
Adjust the shape of the liquid tube using a tube bender at
the installation site and connect it to the liquid tubing side
valve using a flare.
Apply refrigerant
lubricant here and here
Fig. 9-4
Union
Flare nut
Fig. 9-5
Cautions During Brazing
Replace air inside the tube with nitrogen gas to
prevent copper oxide film from forming during the
brazing process. (Oxygen, carbon dioxide and Freon
are not acceptable.)
Do not allow the tubing to get too hot during brazing.
The nitrogen gas inside the tubing may overheat,
causing refrigerant system valves to become
damaged. Therefore allow the tubing to cool when
brazing.
Use a reducing valve for the nitrogen cylinder.
Do not use agents intended to prevent the formation
of oxide film. These agents adversely affect the
refrigerant and refrigerant oil, and may cause
damage or malfunctions.
9-2. Connecting Tubing between Indoor and
Outdoor Units
(1) Tightly connect the indoor-side refrigerant tubing extended
from the wall with the outdoor-side tubing.
(2) To fasten the flare nuts, apply specified torque as at right.
When removing the flare nuts from the tubing connec-
tions, or when tightening them after connecting the tubing,
be sure to use 2 monkey wrenches or spanners as
shown. (Fig. 9-6)
If the flare nuts are over-tightened, the flare may be damaged, which could result in refrigerant leakage and cause
injury or asphyxiation to room occupants.
When removing or tightening the gas tube flare nut, use 2
monkey wrenches together: one at the gas tube flare nut,
and one at part A. (Fig. 9-7)
For the flare nuts at tubing connections, be sure to use
the flare nuts that were supplied with the unit, or else flare
nuts for R410A (type 2). The refrigerant tubing that is
used must be of the correct wall thickness as shown in
the table at right.
Torque wrench
Indoor unit
Outdoor unit
Spanner
Fig. 9-6
A
Fig. 9-7
Tube diameter
ø1/4" (6.35 mm)
ø3/8" (9.52 mm)
ø1/2" (12.7 mm)
ø5/8" (15.88 mm)
Tightening torque
(approximate)
14 – 18 N
(140 – 180 kgf
34 – 42 N
(340 – 420 kgf
49 – 61 N
(490 – 610 kgf
68 – 82 N
(680 – 820 kgf
m
·
·
m
·
·
m
·
·
m
·
·
cm)
cm)
cm)
cm)
Tube thickness
1/32 in.
1/32 in.
1/32 in.
1/32 in.
Because the pressure is approximately 1.6 times higher than
conventional refrigerant pressure, the use of ordinary flare
nuts (type 1) or thin-walled tubes may result in tube rupture,
injury, or asphyxiation caused by refrigerant leakage.
In order to prevent damage to the flare caused by
over-tightening of the flare nuts, use the table above as a
guide when tightening.
When tightening the flare nut on the liquid tube, use a mon-
key wrench with a nominal handle length of 7-7/8 in.
97
Page 98
Do not use a spanner to tighten the valve stem caps.
Doing so may damage the valves.
Depending on the installation conditions, applying
excessive torque may cause the nuts to crack.
Precautions for Packed Valve Operation
If the packed valve is left for a long time with the valve
stem cap removed, refrigerant will leak from the valve.
Therefore, do not leave the valve stem cap removed.
Use a torque wrench to securely tighten the valve stem
cap.
Valve stem cap tightening torque:
Packed valve
Valve stem
Valve stem cap
Fig. 9-8
2 tubes arranged together
Charging port
Main valve
Charging port8 – 10 N • m (80 – 100 kgf • cm)
ø3/8" (Liquid side)19 – 21 N • m (190 – 210 kgf • cm)
ø5/8
" (Gas side)28 – 32 N • m (280 – 320 kgf • cm)
9-3. Insulating the Refrigerant Tubing
Tubing Insulation
Thermal insulation must be applied to all unit tubing,
including the distribution joint (purchased separately).
* For gas tubing, the insulation material must be heat
resistant to 248°F or above. For other tubing, it must be
heat resistant to 176°F or above.
Insulation material thickness must be 13/32 in. or greater.
If the conditions inside the ceiling exceed DB 86°F and
RH 70%, increase the thickness of the gas tubing
insulation material by 1 step.
If the exterior of the outdoor unit
CAUTION
valves has been finished with a
square duct covering, make sure
you allow sufficient space to
access the valves and to allow
the panels to be attached and
removed.
Taping the flare nuts
Wind the white insulation tape around the flare nuts at the
gas tube connections. Then cover up the tubing
connections with the flare insulator, and fill the gap at the
union with the supplied black insulation tape. Finally, fasten
the insulator at both ends with the supplied vinyl clamps.
(Fig. 9-10)
Insulation material
The material used for insulation must have good insulation
characteristics, be easy to use, be age resistant, and must
not easily absorb moisture.
After a tube has been insulated,
CAUTION
never try to bend it into a narrow curve because it can cause
the tube to break or crack.
Inter-unit
control wiring
Insulation
Gas tube
Armoring tape
Fig. 9-9
Sealer (supplied)
Unit side
insulator
Flare nut
Insulation tape (white)
(supplied)
Flare insulator (supplied)
Tube insulator
(not supplied)
Heat resistant
248ºF or above
Vinyl clamps (supplied)
Fig. 9-10
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
The procedure used for
installing the insulator for
both gas and liquid
tubes is the same.
Fig. 9-11
Never grasp the drain or refrigerant connecting
outlets when moving the unit.
98
Liquid tube
Page 99
9-4. Taping the Tubes
(1) At this time, the refrigerant tubes (and electrical
wiring if local codes permit) should be taped
together with armoring tape in 1 bundle. To
prevent condensation 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.
(3) Clamp the tubing bundle to the wall, using 1
clamp approx. each meter. (Fig. 9-12)
Inter-unit
control wiring
Insulation
Gas tube
Armoring tape
Liquid tube
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.
9-5. Finishing the Installation
After finishing insulating and taping over the tubing,
use sealing putty to seal off the hole in the wall to
prevent rain and draft from entering. (Fig. 9-13)
Fig. 9-12
Apply putty here
Tubing
Fig. 9-13
99
Page 100
10. LEAK TEST, EVACUATION AND
Manifold gauge
ADDITIONAL REFRIGERANT CHARGE
Perform an air-tightness test for this package A/C. Check
that there is no leakage from any of the connections.
Air and moisture in the refrigerant system may have
undesirable effects as indicated below.
pressure in the system rises
operating current rises
cooling (or heating) efficiency drops
moisture in the refrigerant circuit may freeze and block
capillary tubing
water may lead to corrosion of parts in the refrigerant
system
Therefore, the indoor unit and tubing between the indoor
and outdoor unit must be leak tested and evacuated to
remove any noncondensables and moisture from the
system.
Air Purging with a Vacuum Pump (for Test Run)
C
Preparation
Manifold valve
Check that each tube (both liquid and gas tubes) between
the indoor and outdoor units has been properly connected
and all wiring for the test run has been completed. Remove
Pressure
gauge
the valve caps from both the gas and liquid service valves
on the outdoor unit. Note that both liquid and gas tube
service valves on the outdoor unit are kept closed at this
stage.
The refrigerant charge at the time of shipment is only
guaranteed sufficient for a tubing length of up to 100 ft.
The tubing may exceed this length, up to the maximum
permitted length; however, an additional charge is
necessary for the amount that the tubing exceeds 100 ft.
(No additional refrigerating machine oil is needed.)
Fig. 10-1
Vacuum pump
Outlet
Inlet
Fig. 10-2
LoHi
Charge hose
Cylinder
valve
Nitrogen gas cylinder
(In vertical standing
position)
10-1. Leak Test
(1) With the service valves on the outdoor unit closed,
remove the 1/4 in. flare nut and its bonnet on the gas
tube service valve. (Save for reuse.)
(2) Attach a manifold valve (with pressure gauges) and dry
nitrogen gas cylinder to this service port with charge
hoses.
Use a manifold valve for air
CAUTION
purging. If it is not available,
use a stop valve for this
purpose. The “Hi” knob of the
manifold valve must always be
kept closed.
Open
Gas
tube
Close
Outdoor unit
Liquid
tube
Close
Fig. 10-3
100
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