Page 1
INSTALLATION INSTRUCTIONS
– W-3WAY ECO-i System Air Conditioner –
for Refrigerant R410A
This air conditioner uses the new refrigerant R410A.
NOTE
R410A Models
Indoor Units
Class 9 12 18 24 36 48
X 4-Way Air Discharge Semi-Concealed Type XHX1252 XHX1852 XHX2452 XHX3652
XM 4-Way Air Discharge Semi-Concealed Type XMHX1252 XMHX1852
A 1-Way Air Discharge Semi-Concealed Type AHX0752 AHX0952 AHX1252
U Concealed Duct Type UHX0752 UHX1252 UHX1852 UHX2452 UHX3652
D DHX3652 DHX4852
T Ceiling-Mounted Type THX1252 THX1852 THX2452
K Wall-Mounted Type KHX0752 KHX0952 KHX1252 KHX1852 KHX2452
Concealed Duct
High-Static Pressure Type
Outdoor Units
Class 90 140
CECO-i W-3WAY
* Refrigerant R410A is used in the outdoor units.
Optional Controllers
Timer Wired Remote Controller RCS-TM80BG
Wireless Remote Controller (For U, D Types) RCS-BH80AAB.WL
Wireless Remote Controller (For X Type) RCS-SH80AAB.WL
Wireless Remote Controller (For XM Type) RCS-XM18AAB.WL
Wireless Remote Controller (For A, T Types) RCS-TRP80AAB.WL
RC Wireless Remote Controller (For K Type) RCS-SH1AAB
Simplified Remote Controller RCS-KR1AGB
System Controller SHA-KC64UG
Intelligent Controller SHA-KT256BA
Communication Adaptor SHA-KA128AAB
Remote Sensor ART-K45AGB
LonWorks Interface SHA-LN16UAB
External diameter of service port R410A: 5/16"
7
CHDZ09053 CHDZ14053
CHDZR09053 CHDZR14053
X
XM
A
U
D
T
K
SANYO Commercial Solutions In Canada
A division of SANYO North America Corporation SANYO Canada Inc.
Cornerstone Business Park 1-300 Applewood Crescent
1062 Thorndale Avenue Concord, Ontario
85464369098000 ©SANYO 2008
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Bensenville, IL 60106, U.S.A. L4K 5C7, Canada
a
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
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.
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
When Wiring
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.
ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO
WIRE THIS SYSTEM.
• Do not supply power to the unit until all wiring and tubing
are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this
system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.
• Ground the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
When Transporting
Be careful when picking up and moving the indoor and outdoor
units. Get a partner to help, and bend your knees when lifting
to reduce strain on your back. Sharp edges or thin aluminum
fins on the air conditioner can cut your fingers.
When 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.
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Check of Density Limit
2. The standards for minimum room volume are as follows.
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.
Total amount of refrigerant (lbs)
3
Min. volume of the indoor unit installed room (ft.
<
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 (353 oz)
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 353 oz.
The possible amount of leaked refrigerant gas in rooms D, E
and F is 529 oz.
e.g., charged
amount (529 oz)
(1) No partition (shaded portion)
(2) When there is an effective opening with the adjacent
room for ventilation of leaking refrigerant gas (opening without a door, or an opening 0.15% or larger than
the respective floor spaces at the top or bottom of the
door).
Outdoor unit
Refrigerant tubing
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
Outdoor unit
Ver y
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 8.8 ft. high)
3
ft.
4000
3500
3000
2500
2000
1500
Min. indoor volume
1000
Range below
the density limit of
0.3 oz/ft.
(countermeasures
not needed)
500
00
0
3
Range above
the density limit of
0.3 oz/ft.
(countermeasures
needed)
400200 600 800 1000 1200
Total amount of refrigerant
3
3
454
398
341
284
227
170
114
57
oz
2
ft.
Min. indoor floor area
(when the ceiling is 8.8 ft. high)
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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 Seamless
Pipes and Tubes.”
For tubes of ø7/8" (ø22.22 mm) or larger, use C1220 T-1/2H material or H material, and do not bend the 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, 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 caps or tape to
CAUTION
Copper tube
Wall thickness 1/32 (0.8) 1/32 (0.8) 1/32 (0.8) 5/128 (1.0)
Copper tube
Wall thickness 5/128 (1.0) 5/128 (1.0) 5/128 (1.0) 3/64 (1.1)
Material O
Outer diameter 1/4 (6.35) 3/8 (9.52) 1/2 (12.7) 5/8 (15.88) 3/4 (19.05)
Material 1/ 2 H, H
Outer diameter 7/8 (22.22) 1 (25.4) 1-1/8 (28.58) 1-1/4 (31.75) 1-1/2 (38.1) 1-5/8 (41.28)
prevent dirt, moisture, or other foreign substances from entering. These substances
can result in system malfunction.
Unit: in. (mm)
over 5/128 (1.0)
over 3/64 (1.15)
over
Unit: in. (mm)
3/64 (1.20)
1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A refriger-
ant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating machine oil, the
prevention of water and other impurities becomes more important than ever.
2. Be sure to recharge the refrigerant only in liquid form.
2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause defects
in the unit.
2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining refriger-
ant 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.
Item compatible Remarks
with R410A?
Manifold gauge Yes No Types of refrigerant, refrigerating machine
oil, and pressure gauge are different.
Charge hose Yes No To resist higher pressure, material must be changed.
Vacuum pump Yes Yes Use a conventional vacuum pump if it is equipped
with a check valve. If it has no check valve,
purchase and attach a vacuum pump adapter.
Leak detector Yes No Leak detectors for CFC and HCFC that
react to chlorine do not function because
R410A contains no chlorine. Leak detector
for HFC134a can be used for R410A.
Flaring oil Yes No For systems that use R22, apply mineral oil (Suniso oil)
to the flare nuts on the tubing to prevent refrigerant
leakage. For machines that use R407C or R410A, apply
synthetic oil (ether oil) to the flare nuts.
New
tool?
R407C tools
Manifold gauge
Vacuum pump
Outlet
Inlet
* Using tools for R22 and R407C and new tools for R410A together can cause defects.
4
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Page 5
3-2. Use R410A exclusive cylinder only.
New refrigerant R410A cannot be used for
earlier models
1. Compressor specifications are different.
If recharging a R22 or R407C compressor with R410A,
durability will significantly decrease since some of the
materials used for compressor parts are different.
2. Existing tubing cannot be used (especially R22).
Completely cleaning out residual refrigerating
machine oil is impossible, even by flushing.
Valve
Single-outlet valve
(with siphon tube)
Liquid refrigerant should be recharged
with the cylinder standing on end as
shown.
Liquid
3. Refrigerating machine oil differs (R22).
Since R22 refrigerating machine oil is mineral oil, it
does not dissolve in R410A. Therefore, refrigerating
machine oil discharged from the compressor can cause
compressor damage.
R22 refrigerating machine oil Mineral oil (Suniso oil)
R407C refrigerating machine oil Synthetic fluid (ether oil)
R410A refrigerating machine oil Synthetic fluid (ether oil)
R410A
5
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Page 6
CONTENTS
Page Page
IMPORTANT! . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Please Read Before Starting
Check of Density Limit
Precautions for Installation Using New Refrigerant
New refrigerant R410A cannot be used for earlier models
1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied
1-3. Type of Copper Tube and Insulation Material
1-4. Additional Materials Required for Installation
1-5. Tubing Length
1-6. Tubing Size
1-7. Straight Equivalent Length of Joints
1-8. Additional Refrigerant Charge
1-9. System Limitations
1-10. Installation Standards
1-11. Check of Limit Density
1-12. Installing Distribution Joint
1-13. Optional Distribution Joint Kits
Optional Distribution Joint Kits
1-14. Optional Solenoid Valve Kit
Example of Tubing Size Selection and
1-15.
Refrigerant Charge Amount
2. SELECTING THE INSTALLATION SITE . . . . 23
2-1. Indoor Unit
2-2. Outdoor Unit
2-3. Precautions When Installing in Heavy Snow
Areas
2-4. Dimensions of Wind Ducting
2-5. Dimensions of Snow Ducting
3. HOW TO INSTALL THE INDOOR UNIT . . . . . 28
4-Way Air Discharge Semi-Concealed Type
(X Type)
3-1. Preparation for Suspending
3-2. Suspending the Indoor Unit
3-3. Placing the Unit Inside the Ceiling
3-4. Installing the Drain Piping
3-5. Checking the Drainage
3-6. How to Install the Ceiling Panel
3-7. Special Remarks
(XM Type)
3-8. Preparation for Suspending
3-9. Suspending the Indoor Unit
3-10. Placing the Unit Inside the Ceiling
3-11. Installing the Drain Piping
3-12. Checking the Drainage
3-13. How to Install the Ceiling Panel
1-Way Air Discharge Semi-Concealed Type
(A Type)
3-14. Suspending the Indoor Unit
3-15. Placing the Unit Inside the Ceiling
3-16. Installing the Drain Piping
3-17. Checking the Drainage
3-18. Electrical Power Wiring
3-19. How to Install the Ceiling Panel
Concealed Duct Type (U Type)
3-20. Required Minimum Space for Installation and
Service
3-21. Suspending the Indoor Unit
3-22. Installing the Drain Piping
3-23. Checking the Drainage
3-24. Increasing the Fan Speed
Concealed Duct High-Static Pressure Type
(D Type)
3-25. Required Minimum Space for Installation and
Service
3-26. Suspending the Indoor Unit
3-27. Installing the Drain Piping
3-28. Caution for Ducting Work
3-29. Indoor Fan Performance
Ceiling-Mounted Type (T Type)
3-30. Required Minimum Space for Installation and
Service
3-31. Suspending the Indoor Unit
3-32. Duct for Fresh Air
3-33. Shaping the Tubing
3-34. Installing the Drain Piping
Wall-Mounted Type (K Type)
3-35. Removing the Rear Panel from the Unit
3-36. Selecting and Making a Hole
3-37. Installing the Rear Panel onto the Wall
3-38. Removing the Grille to Install the Indoor Unit
3-39. Preparing the Tubing
3-40. Shaping the Tubing
3-41. Installing the Drain Hose
3-42. When Using Wireless Remote Controller
Instead of Wired Remote Controller
4. HOW TO INSTALL THE OUTDOOR UNIT . . . 64
4-1. Transporting
4-2. Installing the Outdoor Unit
4-3. Remove the Brackets Used for Transport
4-4. Routing the Tubing
4-5. Prepare the Tubing
4-6. Connect the Tubing
6
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Page 7
Page
5. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . 68
5-1. General Precautions on Wiring
5-2. Recommended Wire Length and Wire
Diameter for Power Supply System
5-3. Wiring System Diagram
5-4. Important Note When Wiring for
Common Type
5-5. Important Note When Wiring for
XM Type
6.
HOW TO PROCESS TUBING . . . . . . . . . . . . 76
6-1. Connecting the Refrigerant Tubing
6-2. Connecting Tubing Between Indoor and
Outdoor Units
6-3. Insulating the Refrigerant Tubing
6-4. Taping the Tubes
6-5. Finishing the Installation
7. AIR PURGING . . . . . . . . . . . . . . . . . . . . . . . . . 80
Air Purging with a Vacuum Pump (for Test Run)
Preparation
8. TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
8-1. Preparing for Test Run
8-2. Test Run Procedure
8-3. Main Outdoor Unit PCB Setting
8-4. Auto Address Setting
8-5. Remote Controller Test Run Settings
8-6. Caution for Pump Down
8-7. Meaning of Alarm Messages
9. APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
9-1. 4-Way Air Discharge Semi-Concealed Type
(X, XM Types)
9-2. 1-Way Air Discharge Semi-Concealed Type
(A Type)
9-3. Concealed Duct (High-Static Pressure) Type
(U, D Types)
9-4. Ceiling-Mounted Type (T Type)
9-5. Wall-Mounted Type (K Type)
7
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Page 8
1. GENERAL
This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for
the outdoor unit and make sure all accessory parts listed are with the system before beginning.
1-1. Tools Required for Installation (not supplied)
1. Flathead screwdriver
2. Phillips head screwdriver
3. Knife or wire stripper
4. Tape measure
5. Carpenter’s 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
See Tables 1-1 – 1-8.
1-3. Type of Copper Tube and Insulation Material
If you wish to purchase these materials separately from a
local source, you will need:
1. Deoxidized annealed copper tube for refrigerant tubing.
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
5. ELECTRICAL WIRING” for details.
Check local electrical codes and
CAUTION
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
Table 1-1 Outdoor Unit
Part name
Connection tubing
Outer
diameter
ø1-1/8"
Outer
diameter
ø7/8"
Figure
Instruction manual paper
Inner
diameter
ø1"
Inner
diameter
ø3/4"
Q’ty
09053 Model
(10 hp)
0
14053 Model
(16 hp)
1
10
11
(hp = horse power)
8
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Page 9
Table 1-2 (4-Way Air Discharge Semi-Concealed) (X-Type)
Part Name Figure
Full-scale installation diagram
Drain hose
Hose band
Drain insulator
Flare insulator
Insulating tape
Packing
Wiring cover
Screw
Washer
Screw
White
(heat-resisting)
Q’ty
Printed on container box
1
For securing drain hose
1
For securing drain hose
1
For drain joint
1
For liquid tube
1
For gas tube
1
For gas tube joint
2
For drain joint
1
For covering electrical wiring
1
For full-scale installation diagram
4
For suspending indoor unit from ceiling
8
For fixing the wiring cover
1
Table 1-3 (1-Way Air Discharge Semi-Concealed)
Part Name Figure
Full-scale installation diagram Printed on container box
Drain hose
Hose band
Drain insulator
Flare insulator
Insulating tape
Washer
Screw
Bushing
White
(heat-resisting)
Q’ty
1
1
For securing drain hose
1
For securing drain hose
1
For drain joint
1
For liquid tube
1
For gas tube
For gas tube joint
2
For drain joint
1Packing
8
For suspending indoor unit from ceiling
4
For full-scale installation diagram
1
For electrical junction box
Remarks
Remarks
Table 1-4 (Concealed Duct)
Part Name Figure
Drain hose
Hose band 1
Packing 1
Drain insulator 1
Flare insulator 1
Insulating tape 2
Flare insulator 1
Washer 8
Sealing putty 1
Vinyl clamp 8
●
Use M10 or 3/8" for suspending bolts.
●
Field supply for suspending bolts and nuts.
White
(heat-resisting)
Q’ty
For securing drain hose
1
For securing drain hose
For drain joint
For drain joint
For liquid tube
For gas and liquid tubes flare nuts
For gas tube
For suspending indoor unit from ceiling
For sealing recessed portion of power supply
For flare and drain insulators
Remarks
9
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Page 10
Table 1-5 (Concealed Duct High-Static Pressure)
Part Name Figure
Flare insulator
Q’ty
8 For suspending indoor unit from ceiling Washer
8 For suspending indoor unit from ceiling Nut
1 For gas tube
1 For liquid tube
1 For drain pipe connection Drain socket
Remarks
Table 1-6 (Ceiling-Mounted)
Part Name Figure
Full-scale installation diagram 1 Printed on container box
Washer 4 For temporarily suspending indoor unit from ceiling
T1/8"
T3/16"
Insulating tape 2 For gas and liquid tubes flare nuts
White
(heat-resisting)
Vinyl clamp 8 For flare and drain insulators
Drain hose 1 For main unit and PVC pipe joints
Hose band 2 For drain hose connection
Drain insulator 1 For drain hose joint
Gum eyelet 2 For power supply inlet and 3 way wiring
L5-1/2"
Q’ty
2
2
Remarks
For gas and liquid tube joints Flare insulator
inlet
Table 1-7 (Wall-Mounted)
Part Name Figure
5/32" s 1"
Q’ty
10 For fixing the rear panel Tapping screw
1 For improved tubing appearance Plastic cover
1 For insulating flare nut (2452 type only) Insulator
Table 1-8 (4-Way Air Discharge Semi-Concealed) (XM Type)
Parts Name Figure RemarksQ'ty
T3
T5
8
2
set
2
8
1
Washer
Flare
insulation
Insulation tie
Vinyl tie
Drain hose
insulation
●
Use M10 or 3/8" for suspending bolts.
●
Field supply for suspending bolts and nuts.
T10
For temporarily
suspending indoor
unit from ceiling
For gas /
liquid tube
connection
For gas /
liquid tube / flare
nut connection
For flare / drain
insulating
connection
For drain tube
connection
Parts Name Figure RemarksQ'ty
Full-scale
installation
diagram
Washer head
screw
Drain hose
Hose band
Remarks
L140
Printed on
1
container box
For full-scale
installation
4
diagram
For unit & PVC
1
tube connection
For drain hose
2
connection
10
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Page 11
1-5. Tubing Length
Select the installation location so that the length and size of refrigerant tubing are within the allowable range shown
in the figure below.
1. Main tubing length LM = LA + LB … b 262 ft.
2. Main distribution tubes LC – LH are selected according to the capacity after the
3. Sizes of indoor unit connection tubing 1 – 40 are determined by the connection tubing
distribution joint.
sizes on the indoor units.
H3
Balance tubing
(ø9.52)
C
LM
B
LB LC
LD
L2
L1
T-joint tubing
(header joint system)
LE L3
LA
H1
H2
Explanation of symbols
Distribution joint
(APR: purchased separately)
LF
Max. 1.3 ft.
Max. 1.3 ft.
For
extension
For
extension
4
5 6
LH
Ball valve (field supply)
T-joint (field supply)
Solidly welded shut
(pinch weld)
Note: Do not use commercially available T-joints for the liquid tubing and parts.
* Be sure to use special R410A distribution joints (APR: purchased separately) for outdoor
unit connections and tubing branches.
L4
LG
1
2
7
Solenoid valve kit
40
3
R410A distribution joint
APR-CHRZP900BAB (for outdoor unit)
APR-RZP224BAB (for indoor unit)
APR-RZP680BAB (for indoor unit)
APR-RZP1350BAB (for indoor unit)
Table 1-9 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
Item Mark Contents Length (ft.)
Actual length 492
Equivalent length 574
Allowable tubing
length
Allowable elevation
difference
L1 Max. tubing length
$L (L2 – L4)
Difference between max. length and min.
length from the No. 1 distribution joint
LM Max. length of main tubing (at max. diameter) 262
40
,2...
1
2
+
L1+
A
...
1
B
+
+LF+LG+LH each distribution tube (only liquid tubing)
L5
H1
H2
Max. length of each distribution tube 98
39
+
Total max. tubing length including length of
Distance between outdoor units
When outdoor unit is installed higher than indoor unit 164
When outdoor unit is installed lower than indoor unit 131
Max. difference between indoor units
H3 Max. difference between outdoor units
Allowable length of
joint tubing
L = Length, H = Height
L3
T-joint tubing (field-supply); Max. tubing length between
the first T-joint and solidly welded-shut end point
NOTE
1: If the longest tubing length (L1) exceeds 295 ft. (equivalent length), increase the sizes of the main tubes (LM) by 1 rank for
the discharge tubes, suction tubes, and liquid tubes. (Use a field supply reducer.)
2: If the longest main tube length (LM) exceeds 164 ft., increase the main tube size at the portion before 164 ft. by 1 rank for
the suction tubes and discharge tubes. (Use a field supply reducer.)
(For the portion that exceeds 164 ft., set based on the main tube sizes (LA) listed in the table on the following page.)
>
>
>
>
>
>
>
>
>
>
>
>
131
*2
984
32
49
13
6.6
11
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Page 12
1-6. Tubing Size
Table 1-10 Main Tubing Size (LA)
Unit: in. (mm)
26
16
10
ø1-3/8"
(ø34.92)
ø1-1/8"
(ø28.58)
(ø19.05)
307.100
32
16
16
ø3/4"
BTU/h
Total system
horsepower
Combined
outdoor units
Suction tubing
Discharge tubing
Liquid tubing
95.500
10
10
ø7/8"
(ø22.22)
ø3/4"
(ø19.05)
ø3/8"
(ø9.52)
153.600
16
16
ø1-1/8"
(ø28.58)
(ø22.22)
ø1/2"
(ø12.70)
ø7/8"
191.000
20
10
10
ø5/8"
(ø15.88)
249.100
*1: If future extension is planned, select the tubing diameter based on the total horsepower after extension.
However extension is not possible if the resulting tubing size is two ranks higher.
*2: The balance tube (outdoor unit tube) diameter is ø3/8" (ø9.52).
*3: Type 1 tubing should be used for the refrigerant tubes.
*4: If the length of the longest tube (L1) exceeds 295 ft. (equivalent length), increase the main tube (LM) size by 1 rank for the
suction, discharge, and liquid tubes. (Use field-supply reducers.) (Select from Table 1-10 and Table 1-15.)
*5: If the longest main tube length (LM) exceeds 164 ft., increase the main tube size at the portion before 164 ft. by 1 rank for
the suction tubes and discharge tubes.
(For the portion that exceeds 164 ft., set based on the main tube sizes (LA) listed in the table above.)
Table 1-11 Main Tubing Size After Distribution (LB, LC...)
Total capacity
after distribution
Tubing size
Total capacity
after distribution
Tubing size
Below BTU/h
Over BTU/h
Suction tubing
Discharge tubing
Liquid tubing
Below BTU/h
Over BTU/h
Suction tubing
Discharge tubing
Liquid tubing
24.200
(2.5 hp)
–
ø5/8"
(ø15.88)
ø1/2"
(ø12.70)
ø3/8"
(ø9.52)
258.000
(27 hp)
238.900
(25 hp)
ø1-3/8"
(ø34.93)
ø1-1/8"
(ø28.58)
ø3/4"
(ø19.05)
54.600
(6 hp)
24.200
(2.5 hp)
ø3/4"
(ø19.05)
ø5/8"
(ø15.88)
ø3/8"
(ø9.52)
334.400
(35 hp)
258.000
(27 hp)
ø1-3/8"
(ø34.93)
ø1-1/8"
(ø28.58)
ø3/4"
(ø19.05)
85.300
(9 hp)
54.600
(6 hp)
ø3/4"
(ø19.05)
ø5/8"
(ø15.88)
ø3/8"
(ø9.52)
–
334.400
(35 hp)
ø1-1/2"
(ø38.10)
ø1-1/8"
(ø28.58)
ø3/4"
(ø19.05)
102.400
(11 hp)
85.300
(9 hp)
ø7/8"
(ø22.22)
ø3/4"
(ø19.05)
ø3/8"
(ø9.52)
124.200
(13 hp)
102.400
(11 hp)
ø1-1/8"
(ø28.58)
ø3/4"
(ø19.05)
ø1/2"
(ø12.70)
143.300
(15 hp)
124.200
(13 hp)
ø1-1/8"
(ø28.58)
ø7/8"
(ø22.22)
ø1/2"
(ø12.70)
162.400
(17 hp)
143.300
(15 hp)
ø1-1/8"
(ø28.58)
ø7/8"
(ø22.22)
ø1/2"
(ø12.70)
*1: If the total capacity of the indoor units con-
nected to the tube ends is different from the
total capacity of the outdoor units, then the
main tube size is selected based on the total
capacity of the outdoor units.
(For LA, LB, and LF in particular)
Unit: in. (mm)
hp = horsepower
200.600
(21 hp)
162.400
(17 hp)
ø1-1/8"
(ø28.58)
ø7/8"
(ø22.22)
ø5/8"
(ø15.88)
238.900
(25 hp)
200.600
(21 hp)
ø1-1/8"
(ø28.58)
ø1-1/8"
(ø28.58)
ø5/8"
(ø15.88)
Table 1-12 Outdoor Unit Tubing Connection Size ( A – D)
BTU/h
Suction tubing
95.500 153.600
ø7/8"(ø22.22)
ø1-1/8"(ø28.58)
Brazing connection
Discharge
tubing
Liquid tubing
Balance tubing
ø3/4"(ø19.05)
Brazing connection
ø3/8"(ø9.52)
Brazing connection
ø3/8"(ø9.52)
Flare connection
ø7/8"(ø22.22)
ø1/2"(ø12.7)
Unit: in. (mm)
12
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Page 13
Table 1-13 Indoor Unit Tubing Connection Size ( 1 – 40)
Indoor unit type
Total system horsepower
Distribution
joint –
solenoid valve
kit tubing
Solenoid valve
kit – Indoor
Suction tubing
Discharge tubing
Liquid tubing
Gas tubing
unit tubing
connection
Liquid tubing
7
0.8
912
1
1.3
ø1/2"
(ø12.70)
ø1/4"
(ø6.35)
18 24
2345
ø5/8"
(ø15.88)
ø1/2"
(ø12.70)
ø3/8"
(ø9.52)
ø5/8"
(ø15.88)
ø3/8"
(ø9.52)
36
in. (mm)
48
*1: For the solenoid valve kits, use type 160 with parallel specifications. Branch the tubing before and after the solenoid valve kits.
1-7. Straight Equivalent Length of Joints
Design the tubing system by referring to the following table for the straight equivalent length of joints.
Table 1-14 Straight Equivalent Length of Joints
Gas tubing size (in.(mm))
90o elbow
45o elbow
U-shape tube bent
(R2–23/64–3–15/16 in.)
T r ap bend
1/2"
(12.7)
1 ft.
(0.30 m)
0.8 ft.
(0.23 m)
3 ft.
(0.90 m)
7.5 ft.
(2.30 m)
5/8"
(15.88)
1.1 ft.
(0.35 m)
0.9 ft.
(0.26 m)
3.4 ft.
(1.05 m)
9.2 ft.
(2.80 m)
3/4"
(19.05)
1.4 ft.
(0.42 m)
1 ft.
(0.32 m)
4.1 ft.
(1.26 m)
10.5 ft.
(3.20 m)
7/8"
(22.22)1"(25.4)
1.6 ft.
(0.48 m)
1.2 ft.
(0.36 m)
4.7 ft.
(1.44 m)
12.5 ft.
(3.80 m)
1.7 ft.
(0.52 m)
1.3 ft.
(0.39 m)
5.1 ft.
(1.56 m)
14.1 ft.
(4.30 m)
1-1/8"
(28.58)
1.9 ft.
(0.57 m)
1.4 ft.
(0.43 m)
5.6 ft.
(1.71 m)
15.4 ft.
(4.70 m)
1-1/4"
(31.8)
2.3 ft.
(0.70m)
1.7 ft.
(0.53 m)
6.9 ft.
(2.10 m)
16.4 ft.
(5.00 m)
1-1/2"
(38.1)
2.6 ft.
(0.79 m)
1.9 ft.
(0.59 m)
7.8 ft.
(2.37 m)
14.0 ft.
(5.80 m)
Y-branch distr ibution joint Equivalent length con version not needed.
Ball v alve f or ser vice Equivalent length con version not needed.
Table 1-15 Refrigerant tubing (Existing tubing can be used.)
Material O Material 1/2H • H
ø1/4" (ø6.35) t1/32 (t0.8)
ø3/8" (ø9.52) t1/32 (t0.8) ø1-1/8" (ø28.58) t5/128 (t1.0)
ø1/2" (ø12.7) t1/32 (t0.8) ø1-1/4" (ø31.75) t3/64 (t1.1)
ø5/8" (ø15.88) t5/128 (t1.0) ø1-1/2" (ø38.10) over t3/64 (t1.15)
ø3/4" (ø19.05)
ø7/8" (ø22.22) t5/128 (t1.0)
Tubing size (in. (mm))
over t5/128 (t1.0)
* When bending the tubes, use a bending
radius that is at least 4 times the outer
diameter of the tubes.
In addition, take sufficient care to avoid
crushing or damaging the tubes when
bending them.
ø1-5/8" (ø41.28) over t3/64 (t1.20)
1-8. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.
Table 1-16-1 Amount of Refrigerant Charge Per ft.,
According to Liquid Tubing Size
Liquid tubing
size
Amount of
refrigerant
charge (oz/ft.)
ø1/4"
(ø6.35)
ø3/8"
(ø9.52)
ø1/2"
(ø12.7)
ø5/8"
(ø15.88)
ø3/4"
(ø19.05)
ø7/8"
(ø22.22)
0.279 0.602 1.38 1.99 2.78 3.93
Required amount of charge = Necessary Amount of
Refrigerant Charge Per Unit (14053 Type) + (Amount
of refrigerant charge per ft. of each size of liquid tube
its tube length) + (...) + (...)
×
* Always charge accurately using a scale for weighing.
Table 1-16-2 Necessary Amount of Refrigerant
Charge Per Unit
CHDZ09053
CHDZR09053
— 113 oz/unit
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CHDZ14053
CHDZR14053
13
Page 14
Table 1-17 Refrigerant Charge Amount at Shipment (for outdoor unit)
CHDZ09053 CHDZ14053
DC
CHDZR09053 CHDZR14053
(oz)
416 416
1-9. System Limitations
Table 1-18 System Limitations
Max. No. allowable connected outdoor units 2
Max. capacity allowable connected outdoor units
Max. connectable indoor units 40
307,100 BTU/h (32 hp, 90 kw)
*1
Max. allowable indoor/outdoor capacity ratio 50 – 130 %
*1: In the case of 20 hp (type 191.100 BTU/h) or smaller units, the number is limited by the total capacity of the connected indoor units.
1-10. Installation Standards
Relationship between A/C units and refrigerant tubing
Outdoor unit Outdoor unit Indoor unit
●
Install the solenoid valve kit 98 ft. or less from the indoor unit.
●
In quiet locations such as hospitals, libraries, and hotel rooms, the refrigerant noise may be somewhat notice-
4-tube layout 3-tube layout 2-tube layout
Suction tube
Discharge tube
Liquid tube
Balance tube
Suction tube
Discharge tube
Liquid tube
Solenoid
valve kit
Gas tube
Liquid
tube
able. It is recommended that the solenoid valve kit be installed inside the corridor ceiling, at a location outside
the room.
Room
Indoor unit
Room
Indoor unit
NO
Room
Indoor unit
Room
Indoor unit
YES
Hallway
Solenoid
valve kit
Hallway
Solenoid
valve kit
Common solenoid valve kit
●
Multiple indoor units under group control can utilize a solenoid valve kit in common.
●
Categories of connected indoor unit capacities are determined by the solenoid valve kit.
Type of solenoid valve kit Total capacity of indoor units (BTU/h)
160 19.000
56 7.500
●
If the capacity range is exceeded, use 2 solenoid valves connected in parallel.
<
Total capacity < 54.600
<
Total capacity < 19.000
14
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Page 15
Always check the gas density
WARNING
limit for the room in which the
unit is installed.
1-11. Check of Limit Density
When installing an air conditioner in a room, it is necessary
to ensure that even if the refrigerant gas accidentally leaks
out, its density does not exceed the limit level for that room.
If the density could exceed the limit level, it is necessary to
provide an opening between the unit and the adjacent room,
or to install mechanical ventilation which is interlocked with
a 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 is
0.3 oz/ft.3 (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 in the field. (For the refrigerant charge amount at
shipment, refer to the unit’s nameplate.)
tubing to the malfunctioning unit will accumulate
and may damage the compressor.)
Minimum indoor volume & floor area as against the
amount of refrigerant is roughly as given in the following table.
3
ft.
10000
9500
9000
Range below
8500
the density limit of
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
Min. indoor volume
3000
2500
2000
1500
1000
500
00
0
3
0.3 oz/ft.
(countermeasures
not needed)
Range above
the density limit of
0.3 oz/ft.
(countermeasures
needed)
1000500 1500 2000 2500 3000
Total amount of refrigerant
3
Tube branching methods (horizontal use)
2
ft.
1136
1079
1022
966
909
852
795
738
682
625
568
511
454
398
Min. indoor floor area
341
284
227
170
114
57
oz
(when the ceiling is 8.8 ft. high)
1-12. Installing Distribution Joint
Pay special attention to any
CAUTION
location, such as a basement,
etc., where leaking refrigerant
can accumulate, since refrigerant gas is heavier than air.
(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT”
enclosed with the optional distribution joint kit
(APR-CHRZP900BAB, RZP224BAB, RZP680BAB,
RZP1350BAB).
(2) When creating a branch using a commercially available
T-joint (header joint system), orient the main tubing so
that it is either horizontal (level) or vertical. In order to
prevent accumulation of refrigerant oil in stopped units,
if the main tubing is horizontal then each branch tubing
length should be at an angle that is greater than horizontal. If the main tubing is vertical, provide a raised starting
portion for each branch.
[Header joint system]
●
Be sure to solidly weld shut the T-joint end (marked
by “X” in the figure). In addition, pay attention to the
insertion depth of each connected tube so that the
flow of refrigerant within the T-joint is not impeded.
●
When using the header joint system, do not make fur-
ther branches in the tubing.
●
Do not use the header joint system on the outdoor
unit side.
(3) If there are height differences between indoor units or if
branch tubing that follows a distribution joint is connected to only 1 unit, a trap or ball valve must be added to
that distribution joint. (When adding the ball valve, locate
it within 15 - 3/4" of the distribution joint.)
If a trap or ball valve is not added, do not operate
the system before repairs to a malfunctioning unit
are completed. (The refrigerant oil sent through the
15
B
Header joint system (Indoor)
Outdoor
Indoor
Horizontal
line
L3 6.56 ft.
Types of vertical trap specifications
(When using ball valve)
Main tubing
Ball valve
(BV: purchased
separately)
Indoor unit (1)
(When not using ball valve)
Main tubing
Indoor unit is directed downward
Indoor unit (more than 2 units)
(If only 1 unit is connected, a ball valve
is also needed on this side.)
Branch tubing is
directed upward.
More than
7–7/8"
A
Arrow view
Install at a
positive angle
Indoor
Indoor
Horizontal
line
Horizontal
Indoor unit
15 to 30
B
Horizontal
line
View as seen
from arrow
Install at a
positive angle
(15 – 30°)
Solidly welded
shut (X)
(Each unit is connected
to tubing that is either
level or is directed
downward.)
A
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Page 16
1-13. Optional Distribution Joint Kits
See the installation instructions packaged with the distribution joint kit for the installation procedure.
Table 1-19
Model name Cooling capacity after distribution Remarks
1. APR-CHRZP900BAB 307.100 BTU/h or less For outdoor unit
2. APR-RZP224BAB 76.400 BTU/h or less For indoor unit
3. APR-RZP680BAB 232.000 BTU/h or less For indoor unit
4. APR-RZP1350BAB 460.700 BTU/h or less For indoor unit
Tubing size (with thermal insulation)
■
1. APR-CHRZP900BAB
For outdoor unit (Capacity after distribution joint is 307.100 BTU/h or less.)
Note that the dimension marked with every alphabetical letter in the diagram shows the inner diameter.
Suction Tube
B
Distribution
Joint
11- 13/ 16 11- 13/ 16
C
#C
#C
D
E
C
D
E
DE
Insulation
*Insulators for both the Suction tube and the Discharge tube are the same.
C
Discharge Tube
#C
#C
D
E
F
Liquid Tube
G
F
EDF
C
F
G
H
I
E
E
13-25/64
EFG
HI
InsulationInsulation
Unit: in.
*Suction tube and Discharge tube are similar in sizes and both the tube entrances have the same diameter. So the both
Distribution joints can fit into different tubes. Since the diameter of the tube ends for both Suction and Discharge tube are
different, take care not to connect the distribution joint different. See the " # " marks on the above figures.
Table 1-20 Dimensions for connections of each part
Size
Inch
Part B Part C Part D Part E Part F Part G Part H Part I
7/81-1/4
3/41-1/8 3/85/8 1/21
16
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Page 17
Table 1-21 Dimensions for connections of each part
Unit: in.
Position A B C D E F G H I J
Dimension ø1-1/2" ø1-1/4" ø1-1/8" ø1" ø7/8" ø3/4" ø5/8" ø1/2" ø3/8" –
2. APR-RZP224BAB
Use: For indoor unit (Capacity after distribution joint is 76.400 BTU/h or less.)
Example: (F below indicates inner diameter. below indicates outer diameter.)
F
Liquid tubing
9–1/4
I
H
HIIH
2–23/32
2–11/64
F
G
F
Suction tubing
8–17/64
F
F
F
G
H
5–45/64
F
GH
2–11/64
3–5/8 15/32
1–37/64
Discharge tubing
7–21/64
H
G
5–23/64
H
G
HH
H
H
G
3–1/32 9/32
Thermal insulation
Thermal insulation
Thermal insulation
Unit: in.
3. APR-RZP680BAB
Use: For indoor unit (Capacity after distribution joint is greater than 76.400 BTU/h and no more than 232.000 BTU/h.)
Note that the dimension marked with every alphabetical letter in the diagram shows the inner diameter.
Suction Tube
11- 13/ 16
#C
EFD
C
D
EF
G
#C
D
E
Insulation
F
G
*Insulators for both the Suction tube and the Discharge tube are the same.
*Suction tube and Discharge tube are similar in sizes and both the tube entrances have the same diameter. So the both
Distribution joints can fit into different tubes. Since the diameter of the tube ends for both Suction and Discharge tube are
different, take care not to connect the distribution joint different. See the " # " marks on the above figures.
FED
Insulation
Discharge Tube
11-13/16
C
#D
E
F
G
H
#D
Liquid Tube
I
H
FE
HG
GF E
H
I
G
F
E
EFG
13-25/64
Insulation
Unit: in.
IH
4. APR-RZP1350BAB
Use: For indoor unit (Capacity after distribution joint is greater than 232.000 BTU/h and no more than 460.700 BTU/h.)
Example: (B below indicates inner diameter. below indicates outer diameter.)
Suction tubing • Discharge tubing
H
G
2–11/64
C
Thermal insulation
W-3WAYECO-iUS.indd17W-3WAYECO-iUS.indd17 2008/02/0710:55:402008/02/0710:55:40
F
BB
3–35/64
F
E
D
C
C
A
B
B
BB
4–9/64 4–13/32
1–49/64
C
B
Liquid tubing
I
H
G
G
F
E
E
13–25/64
G
E
F
G
G
F
I
H
ECDAFFADCE
Thermal insulation
G
5–1/8
HI
1–31/32
Unit: in.
17
Page 18
1-14. Optional Solenoid Valve Kit
Precautions on Installation of Solenoid Valve Kit
(1) Clean base metals thoroughly.
(2) Use proper ventilation to carry fumes away from the work area.
(3) Use a high quality silver based solder of at least 15 % silver.
(4) Heat the base materials broadly and uniformly.
(5) Take precautions not to overheat the device which could damage sensitive internal components.
(6) Insure compliance with all local codes!
Part
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1-21/32
3-21/32
ATK-RZP56BAWB
Types and specifications of
tubing connections
Gas tube: ID1/2"
Liquid tube : ID1/4"
Suspension hook
Liquid tube : ID3/8"
Suction tube: ID5/8"
Discharge tube: ID1/2"
Service panel
Base of control box
Terminal for power line
Terminal for communication line
Earth (M5 with washer)
Cover of control box
Relay kit
Cover of relay kit
5-25/32
1-21/32
3-21/32
4-7/32
Specifications
ATK-RZP56BAWB
Compatibility
Power source
Power input
Net weight
Accessories
7.500 Total capacity of indoor units (BTU/h) < 19.000
Single-phase 200V 50/60Hz (supplied by indoor unit)
20 W
151.7 oz.
Washer x 2
Insulating tape
1
3
6
63/64
4
5
2-31/64
3-15/16
6-29/64
8-15/32
63/64
2-31/64
3-15/16
9-13/32
7
53/64 2-63/64
2
5-55/64
4-21/64 4-21/64
9
11
8
5-3/64
4-1/4
3-25/32
12
5-55/64
9-29/64
7/16
43/64
1-7/64
5-55/64
2-3/64
5-9/32
4-49/64
Unit: in.
1314
10
18
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Page 19
ATK-RZP160BAWB
Specifications
Part
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1-21/32
3-21/32
Types and specifications of
tubing connections
Gas tube: ID5/8"
Liquid tube : ID3/8"
Suspension hook
Liquid tube : ID3/8"
Suction tube: ID5/8"
Discharge tube: ID1/2"
Service panel
Base of control box
Terminal for power line
Terminal for communication line
Earth (M5 with washer)
Cover of control box
Relay kit
Cover of relay kit
5-25/32
4-7/32
3-21/32
1-21/32
ATK-RZP160BAWB
Compatibility
Power source
Power input
Net weight
Accessories
19.000 Total capacity of indoor units (BTU/h) < 54.600
Single-phase 200V 50/60Hz (supplied by indoor unit)
25 W
165.8 oz.
Washer x 2
Insulating tape
1
3
6
63/64
4
5
2-31/64
3-15/16
6-29/64
8-15/32
63/64
2-31/64
3-15/16
9-13/32
7
53/64 2-63/64
2
5-55/64 5-55/64
11
10
9
4-21/64 4-21/64
8
5-3/64
4-1/4
3-25/32
12
9-29/64
7/16
43/64
1-7/64
5-55/64
2-3/64
5-9/32
4-49/64
Unit: in.
1314
10
19
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Page 20
Installation of Solenoid Valve Kit
1. Install the relay kit into the indoor unit.
Refer to the Installation Manual for the solenoid valve kit.
2. Connect the solenoid valve kit and the relay kit in the field.
Gas tube
Liquid tube
Connect with
conduit for
power supply
Suspension hook
Top surface
Discharge tube
Relay kit
Front
Liquid tube
Suction tube
Cover of control box
NOTE
Notes on Installation
• Be sure to secure the valve body by using its structure with the suspension bolt, etc.
• Install the valve body within a distance of 98 ft. from the indoor unit.
Some refrigerant noise will be produced. Therefore in hospitals, libraries, hotel guest rooms, and other quiet
locations, it is recommended that the solenoid valve kit be installed on the ceiling reverse side of a hallway or
another location separated from the room.
• When installing the valve body, install with the top surface facing up. Secure 7-7/8" or more of space to the front
so that the front service panel can be removed.
• If the supplied suspension hook will not be used, and other fastening devices will be attached in the field, use
the 4 screw holes on the top surface. DO NOT use any long screws other than the supplied screws. Use of other
screws may puncture the internal tubing, resulting in refrigerant leakage.
• Do not block the air holes.
Suspension bolt (3/8" or M10) (field supplied)
Nut (field supplied) (3/8" or M10)
Washer
M4 screws
(12 pcs.)
Suspension hook
Front
Service space
20
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7-7/8" or more
Page 21
1-15. Example of Tubing Size Selection and Refrigerant Charge Amount
Additional refrigerant charging
Based on the values in Tables 1-10, 11, 12, 15 and 16-2 use the liquid tubing size and length, and calculate the amount of additional
refrigerant charge using the formula below.
Required additional
refrigerant charge (oz)
(a) : Liquid tubing Total length of ø7/8" (ft.) (d) : Liquid tubing Total length of ø1/2" (ft.)
(b) : Liquid tubing Total length of ø3/4" (ft.) (e) : Liquid tubing Total length of ø3/8" (ft.)
(c) : Liquid tubing Total length of ø5/8" (ft.) (f ) : Liquid tubing Total length of ø1/4" (ft.)
Charging procedure
●
Be sure to charge with R410A refrigerant in liquid form.
1. After performing a vacuum, charge with refrigerant from the liquid tubing side. At this time, all valves must be in the “fully
closed” position.
2. If it was not possible to charge the designated amount, operate the system in Cooling mode while charging with refrigerant
from the gas tubing side. (This is performed at the time of the test run. For this, all valves must be in the “fully open” position.
However if only one outdoor unit is installed, a balance tube is not used. Therefore, leave the valves fully closed.)
Charge with R410A refrigerant in liquid form.
With R410A refrigerant, charge while adjusting the amount being fed a little at a time in order to prevent liquid refrigerant from
backing up.
After charging is completed, turn all valves to the “fully open” position.
●
Replace the tubing covers as they were before.
●
CAUTION
Example:
Outdoor unit
09053
model
Necessary Amount of Refrigerant Charge Per Unit + 3.93 × (a) + 2.78 × (b) + 1.99 × (c) + 1.38 × (d) +
=
0.602 × (e) + 0.279 × (f)
1. R410A additional charging absolutely must
be done through liquid charging.
2. The R410A refrigerant cylinder has a gray
base color, and the top part is pink.
Balance tube
Use a flathead screwdriver
and open by turning the part
with the screw groove to the
right, from " " to " "
3. The R410A refrigerant cylinder includes a
siphon tube. Check that the siphon tube is
present. (This is indicated on the label at
the top of the cylinder.)
4. Due to differences in the refrigerant, pressure, and refrigerant oil involved in installation, it is not possible in some cases to
use the same tools for R22 and for R410A.
09053
model
Liquid tube
Use a hex wrench (width 5/32 inch)
and turn to the left to open.
Discharge tube
Use a flathead screwdriver
and open by turning the part
with the screw groove to the
right, from " " to " "
Use a flathead screwdriver
and open by turning the part
with the screw groove to the
right, from " " to " "
Suction tube
A
B
Example of each tubing length
●
LB
LA
1 2 3 4
48 model 48 model 48 model 36 model
LC
Main tubing Distribution joint tubing
LA = 131 ft. Outdoor side Indoor side
LB = 16 ft.
LC = 16 ft.
A = 7 ft. 1 = 98 ft.
B = 7 ft. 2 = 16 ft.
3 = 16 ft.
4 = 65 ft.
21
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Page 22
Obtain liquid tubing size from Tables 1-10, 11, 12 and 15.
●
Main tubing
LA = ø5/8 (ft.) (Total capacity of indoor unit is 179,400 BTU/h) The longest tubing length in this example
LB = ø1/2 (ft.) (Total capacity of indoor unit is 131,600 BTU/h) (LA = 131 ft.)
LC = ø3/8 (ft.) (Total capacity of indoor unit is 83,800 BTU/h)
Distribution joint tubing
Outdoor side
Indoor side
Obtain charge amount for each tubing size
●
A: ø3/8 (ft.) B: ø3/8 (ft.) (from outdoor unit connection tubing)
1: ø3/8 (ft.) 2: ø3/8 (ft.) 3: ø3/8 (ft.) 4: ø3/8 (ft.) (from indoor unit connection tubing)
Note that the charge amounts per 1 meter are different for each liquid tubing size.
ø5/8 (ft.) → LA : 131 ft. × 1.99 oz/ft. = 261 oz
ø1/2 (ft.) → LB : 16 ft. × 1.38 oz/ft. = 22 oz
ø3/8 (ft.) → LC +
A – B + 1 – 4 : 225 ft. × 0.602 oz/ft. = 135 oz
Total 418 oz
Additional refrigerant charge amount is 418 oz.
Remark:
When operating only one model CHDZ (R) 14053 or jointing with one more model, be sure to include the values in Table 1-16-2
Necessary Amount of Refrigerant Charge Per Unit.
CAUTION
Be sure to check the limit density for
the room in which the indoor unit is
installed.
Checking of limit density
Density limit is determined on the basis of the size of a room
using an indoor unit of minimum capacity. For instance, when
2
an indoor unit is used in a room (floor area 161 ft.
3
ing height 8.8 ft. = room volume 1417 ft.
), the graph at right
shows that the minimum room volume should be 2455 ft.
2
(floor area 279 ft.
) for refrigerant of 418 oz.
× ceil-
3
<Determination by calculation>
Overall refrigerant charge amount for the air conditioner: oz
(Minimum room volume for indoor unit: ft.3)
418 (oz)
=
1417 (ft.
= 0.29 (oz/ft.
3
)
3
) < 0.3 (oz/ft.3)
Therefore, openings such as louvers are not required for this
room.
3
ft.
4000
3500
3000
2500
2000
1500
Min. indoor volume
1000
Range below
the density limit of
0.3 oz/ft.
(countermeasures
not needed)
500
00
0
3
Range above
the density limit of
0.3 oz/ft.
(countermeasures
needed)
400200 600 800 1000 1200
Total amount of refrigerant
3
2
ft.
454
398
341
284
227
170
114
Min. indoor floor area
57
oz
(when the ceiling is 8.8 ft. high)
22
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Page 23
2. SELECTING THE INSTALLATION SITE
2-1. Indoor Unit
Ceiling-Mounted T ype
Ceiling
AVOID:
areas where leakage of flammable gas may be expected.
●
places where large amounts of oil mist exist.
●
direct sunlight.
●
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 high-frequency emissions are generated.
●
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 1-9.
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.
Wall
Min. 10 in.
Front view
Min. 10 in.
NOTE
The rear of the indoor unit can be installed flush
against the wall.
Air
discharge
Min. 2 ft.
Side vie w
Air intake
Max. 10 in.
Obstacle
Fig. 2-1
Concealed Duct (High-Static Pressure) Type
4-Way Air Discharge Semi-Concealed Type
3 ft.
3 ft.
3 ft.
3 ft.
3 ft.
Fig. 2-2
1-Way Air Discharge Semi-Concealed Type
Ceiling
Min. 2 in.
Air
discharge
Min. 3 ft.
Obstacle
Air
intake
Min. 2 in.
Wall
Wall
Side view
Fig. 2-3
Wall-Mounted T ype
Min.
6 in.
23
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Min.6 in.
Front View
Fig. 2-4
Min.
6 in.
Page 24
2-2. Outdoor Unit
AVOID:
heat sources, exhaust fans, etc.
●
damp, humid or uneven locations
●
indoors (no-ventilation location)
●
DO:
choose a place as cool as possible.
●
choose a place that is well ventilated.
●
allow enough room around the unit for air intake/
●
exhaust and possible maintenance.
Installation Space
Install the outdoor unit where there is enough space for ven-
tilation. Otherwise the unit may not operate properly. Fig. 2-6
shows the minimum space requirement around the outdoor
units when 3 sides are open and only 1 side is shuttered,
with open space above the unit. The mounting base should
be concrete or a similar material that allows for adequate
drainage. Make provisions for anchor bolts, platform height,
and other site-specific installation requirements.
Leave space open above the
●
CAUTION
unit.
Construct louvers or other
●
openings in the wall, if necessary, to ensure adequate
ventilation.
Exhaust fan
Hot air
Heat
Outdoor
unit
source
Fig. 2-5
Example of installation of 2 units
(When wall height is below 6 ft.)
* More than 4 in.
* More than 4 in.
More than
2 in.
* More than 4 in.
* However, be sure to ensure a space of 1 ft. or more at
either the right side or the rear of the unit.
More than
1.7 ft.
Fig. 2-6
NOTE
Do not do any wiring or tubing within 1 ft. of the front
●
panel, because this space is needed as a servicing
space for the compressor.
Ensure a base height of 4 in. or more to ensure that
●
drainage water does not accumulate and freeze
around the bottom of the unit.
If installing a drain pan, install the drain pan prior to
●
installing the outdoor unit.
* Make sure there is at least 6 in. between the outdoor
unit and the ground.
Also, the direction of the tubing and electrical wiring
should be from the front of the outdoor unit.
74-1/64 (Ceiling panel dimensions)
35-3/64 (Ceiling panel dimensions) 35-3/64 (Ceiling panel dimensions)
31-7/64 (Installation hole pitch) 31-7/64 (Installation hole pitch)
70-5/64 (Installation hole pitch)
3-15/16
7-7/8
Top view
Fig. 2-7
36-7/32 (Installation hole pitch)
35-3/64 (Ceiling panel dimensions)
37-13/32 (Maximum dimensions)
Unit: in.
24
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Page 25
2-3. Precautions When Installing in Heavy Snow
Areas
a) The platform should be higher than the maximum snow
depth. (Fig. 2-8)
b) 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 the outdoor unit.
c) The platform foundation must be solid and the unit must
be secured with anchor bolts.
d) When installing on a roof subject to strong wind, coun-
termeasures must be taken to prevent the unit from
being overturned.
AVOID
Without snowproof ducting
(Without platform)
Fig. 2-8
25
Fig. 2-9
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Page 26
2-4. Dimensions of Wind Ducting
Reference diagram for air-discharge chamber (field supply)
unit: in.
Ceiling panel
33-3/16
35-3/64
(Ceiling panel dimensions)
35-15/64
(Maximum bracket dimensions)
33-3/16
35-3/64
Air direction: Front direction Air direction: Right direction
35-3/64
(Ceiling panel dimensions)
2-11/64 15/16
97-29/32
65-53/64 (32-5/64)
35-3/64
(Ceiling panel dimensions)
2-11/6415/16
97-29/32
65-53/64 (32-5/64)
Ceiling panel
35-15/64
(Ceiling panel dimensions)
(Maximum bracket dimensions)
Front view Front view Right side view Right side view
Note: Can be installed so that the air direction is to the front, right, left or rear direction.
2-unit installation
(2-unit installation: maximum dimensions)
74-7/32
33-3/16
31-7/64
5-25/32
(Installation hole pitch)
7-7/8
33-3/16
31-7/64
Top view
36-7/32
(Installation hole pitch)
2-11/64 15/16
97-29/32
unit: in.
35-3/64
(Ceiling panel dimensions)
65-53/64 (32-5/64)
Front view Right side view
26
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Page 27
2-5. Dimensions of Snow Ducting
Reference diagram for snow-proof ducting (field supply)
31-17/32
53-55/64
31-17/32
9-13/32
45-5/16
(Ceiling panel dimensions)
36-7/64
2-unit installation
Air direction:
Front direction
Ceiling panel
31-17/32
31-17/32 (Air intake duct)
35-3/64
53-55/64
33-3/16 (Air outlet duct)
9-13/32
1 pc.
4 pc.
9-13/32
(32-5/64)
97-29/32
65-53/64
35-3/64
(Ceiling panel dimensions)
32-7/8 32-7/8
Front view Right side view
Note: Can be installed so that the air direction is to the front, right, left or rear direction.
74-1/64 (Ceiling panel dimensions)
35-3/64
35-3/64
3-15/16
Ceiling panel dimensions
9-13/32
15/16 15/16
36-7/64
9-13/32
45-5/16
Air direction:
Right direction
Ceiling panel
35-3/64
53-55/64
31-17/32
53-55/64
35-3/64
(Ceiling panel dimensions)
9-13/32
9-13/32 9-13/32
unit: in.
33-3/16 (Air outlet duct)
31-17/32 (Air intake duct)
Front view Right side view
Installation hole pitch
31-17/32
45-5/16
36-7/64
Top (Before installation of snowfall protection duct)
35-3/64
36-7/32
37-13/32
31-7/64
7-7/8
223
31-7/64
70-5/64
Installation hole pitchInstallation hole pitch
unit: in.
31-17/32
Ceiling panel
2
1
2
3
3
92-53/64
2
1
2
36-7/64
9-29/64 9-29/64
97-29/32
65-53/64
45-5/16
35-3/64
(Ceiling panel dimensions)
7/82-11/64
1
2
36-7/64
45-5/16
Front view Right side view
27
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Page 28
X
3. HOW TO INSTALL THE INDOOR UNIT
4-Way Air Discharge Semi-Concealed Type (X Type)
■
3-1. Preparation for Suspending
This unit uses a drain pump. Use a carpenter’s level to check that the
unit is level.
3-2. Suspending the Indoor Unit
(1) Fix the suspension bolts securely in the ceiling using the method
shown in the diagrams (Figs. 3-1 and 3-2), by attaching them to
the ceiling support structure, or by any other method that ensures
that the unit will be securely and safely suspended.
(2) Follow Fig. 3-2 and Table 3-1 to make the holes in the ceiling.
34-27/32
(885)
Unit: in. (mm)
34-27/32
(885)
Table 3-1
Type
Length
12, 18, 24, 36
ABCD
31-1/32
(788)
28-15/32
(723)
(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, unit, and panel.
8-17/64
(210)
8-17/64
(210)
Unit: in. (mm)
E
3-15/32
(88)
3-15/32
(88)
Table 3-2
Type
Length
12, 18, 24
36
ABCD
4-29/64
(113)
4-29/64
(113)
6-13/16
(173)
6-13/16
(173)
10-5/64
(256)
12-9/16
(319)
Note: For DC Fan Tap Change Procedure
for 4-Way Cassette, see page 34.
Hole-in-anchor
Hole-in-plug
Concrete Insert
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-1
B (suspension bolt pitch)
D (ceiling opening dimension)
A (suspension bolt pitch)
C (ceiling opening dimension)
Fig. 3-2
Drain outlet(other side)
(VP25)
Suspension lug
D
E
Refregerant tubing joint(liquid side) Refregerant tubing joint(gas side)
3-3. Placing the Unit Inside the Ceiling
(1) When placing the unit inside the ceiling, determine
the pitch of the suspension bolts using the supplied
full-scale installation diagram. (Fig. 3-4)
Tubing and wiring must be laid inside the ceiling
when suspending the unit. If the ceiling is already
constructed, lay the tubing and wiring into position
for connection to the unit before placing the unit
inside the ceiling.
Fig. 3-3
Over 19/32 (15)
Supplied bolt
A
Power supply outlet
Inter-unit control wiring
Full-scale installation diagram
(printed on top of container box)
Fig. 3-4
C
B
1-3/8 (35)
Unit: in. (mm)
15/32 – 43/64
(12 – 17)
Unit: in. (mm)
28
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Page 29
(2) The length of suspension bolts must be appropriate
for a distance between the bottom of the bolt and the
bottom of the unit of more than 19/32 in. as shown in
Fig. 3-5.
Nuts and washers
(use for upper and lower)
Suspension bolt
Suspension lug
(3) Thread the 3 hexagonal nuts and 2 washers (field
supply) onto each of the 4 suspension bolts as shown
in Fig. 3-5. Use 1 nut and 1 washer for the upper side,
and 2 nuts and 1 washer for the lower side, so that the
unit will not fall off the suspension lugs.
(4) Adjust so that the distance between the unit and the
ceiling bottom is 15/32 to 43/64 in. Tighten the nuts on
the upper side and lower side of the suspension lug.
(5) Remove the protective polyethylene used to protect
the fan parts during transport.
3-4. Installing the Drain Piping
(1) Prepare a standard hard PVC pipe (O.D. 1-1/4 in.) for
the drain and use the supplied drain hose and hose
band to prevent water leaks.
The PVC pipe must be purchased separately. The
unit’s transparent drain port allows you to check drainage. (Fig. 3-6)
CAUTION
●
Insert the drain pipe until it contacts the socket,
as shown in Fig. 3-6, then secure it tightly with the
hose band.
●
Do not use adhesive when connecting the supplied
hose.
Reasons: 1. It may cause water to leak from the
connection. Since the connection is
slippery just after the adhesive has been
applied, the pipe easily slips off.
2. The pipe cannot be removed when
maintenance is needed.
●
Do not bend the supplied drain hose 90° or more.
The hose may slip off.
●
Align the hose bands with the end of the hose.
Tighten the hose band firmly. Please make sure
that the bead is not covered by the hose band.
(Fig. 3-6)
Double nut
Connection pipe
(drain port)
Align the hose
band with the end
of the pipe
15/32 – 43/64 (12 – 17)
Fig. 3-5
Hose band
Bead
Supplied
drain hose
Fig. 3-6
Drain insulator (supplied)
Fig. 3-7
Air bleeder prohibited
Hard PVC
socket
VP-25
(Field supply)
Packing
(supplied)
Notch
Unit: in. (mm)
Hard PVC pipe
VP-25
(Field supply)
PVC adhesive
X
CAUTION
Tighten the hose clamps so
their locking nuts face upward.
Fig. 3-8
(Fig. 3-6)
(2) After checking the drainage, wrap the supplied packing
and drain pipe insulator around the pipe. (Fig. 3-7)
●
NOTE
CAUTION
Make sure the drain pipe has a downward gradient (1/100
or more) and that there are no water traps.
29
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Do not install an air bleeder
as this may cause water to
spray from the drain pipe
outlet. (Fig. 3-8)
Page 30
X
CAUTION
●
In cases where it is necessary to raise the height
of the drain piping, the drain piping can be raised
to a maximum height of 33-15/32" above the
bottom surface of the ceiling. Under no
conditions attempt to raise it higher than
33-15/32" above the bottom surface of the ceiling.
Doing so will result in water leakage. (Fig. 3-9)
●
Do not install the pipe with an upward gradient
from the connection port. This will cause the
drain water to flow backward and leak when the
unit is not operating. (Fig. 3-10)
●
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 pipes that are run
indoors.
3-5. Checking the Drainage
After wiring and drain piping are completed, use the
following procedure to check that the water will drain
smoothly. For this, prepare a bucket and wiping cloth to
catch and wipe up spilled water.
(1) Connect power to the power terminal board (R, S
terminals) inside the electrical component box.
11-3/16 in. or less (as short as possible)
33-15/32 in. or less
0 – 45°
* Length of supplied drain hose = 9-27/32 in.
Fig. 3-9
Upward gradient prohibited
Fig. 3-10
Support
pieces
Fig. 3-11
Drainage check
(2) Slowly pour approx. 0.3 gal of water into the drain
pan to check drainage. (Fig. 3-12)
(3) Short the check pin (CHK) on the indoor control
board and operate the drain pump. Check the water
flow through the transparent drain pipe and see if
there is any leakage.
(4) When the check of drainage is complete, open the
check pin (CHK) and remount the tube cover.
CAUTION
Be careful since the fan will
start when you short the pin
on the indoor control board.
Over 3-15/16 in.
Water (Approx. 0.3 gal)
Plastic container
for water intake
Drain pan outlet
Fig. 3-12
30
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3-6. How to Install the Ceiling Panel
3-6-1. Before Installing the Ceiling Panel
Checking the unit position
(1) Check that the ceiling hole is within this range:
33-55/64 × 33-55/64 to 35-53/64 × 35-53/64 in.
must be within the range of 15/32 – 43/64 in. (Fig. 3-13)
A
If not within this range, malfunction or other trouble may occur.
Main unit
X
(2) Use the full-scale installation diagram (from the
packaging) that was supplied with the unit to
determine the positioning of the unit on the ceiling
surface. If the positions of the ceiling surface and
unit do not match, air leakage, water leakage, flap
operation failure, or other problems may occur.
CAUTION
●
Never place the panel face-down. Either hang
it vertically or place it on top of a projecting
object. Placing it face-down will damage the
surface.
●
Do not touch the flap or apply force to it.
(This may cause flap malfunction.)
Remove the air-intake grille and air filter from the
ceiling panel. (Figs. 3-15, 3-16 and 3-17)
a) Remove the 2 screws on the latch of the air-intake
grille. (Fig. 3-15)
b) Slide the air-intake grille catches in the direction
shown by the arrows
to open the grille.
1
(Fig. 3-16)
A
Ceiling side
Ceiling opening
dimension
Fig. 3-13
Fig. 3-14
Latch
Flap
Screw
c) With the air-intake grille opened, remove the grille
hinge from the ceiling panel by sliding it in the direction shown by the arrow
. (Fig. 3-17)
2
Removing the corner cover
a) Slide the corner cover to the direction shown
by the arrow
to remove the corner cover.
1
(Fig. 3-18).
Push
Corner cover
Air-intake grille
Air-intake grille hinge
Fig. 3-16
Corner cover
Fig. 3-18
Fig. 3-15
Ceiling panel
1
1
2
Fig. 3-17
Ceiling panel
1
Strap
31
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X
3-6-2. Installing the Ceiling Panel
After completing the wiring process, install the
supplied wiring cover before installing the panel.
It is not possible to install the wiring cover after installing the panel.
The power must be turned ON in order to change the
flap angle. (Do not attempt to move the flap by hand.
Doing so may damage the flap.)
(1) Insert the temporary fasteners (stainless steel) on
the inside of the ceiling panel into the square holes
on the unit to temporarily fasten the ceiling panel in
place. (Fig. 3-20-1)
●
The ceiling panel must be installed in the correct
direction relative to the unit. Align the REF. PIPE
and DRAIN marks on the ceiling panel corner with
the correct positions on the unit.
●
To remove the ceiling panel, support the ceiling
panel while pressing the temporary fasteners toward
the outside. (Fig. 3-20-1)
(2) Align the panel installation holes and the unit screw
holes.
Screw (supplied)
M4-8 or 5/32" – 5/16"
Fig. 3-19-1
Square hole in unit
Push when
you remove
Temporary
fastener
Inter-unit control wiring
Wiring cover (supplied) Power supply outlet
Fig. 3-19-2
Temporary
fastener
Fig. 3-20-1
Drain tubing corner
Refrigerant tubing
corner
(3) Tighten the supplied washer head screws at the
4 panel installation locations so that the panel is
attached tightly to the unit. (Fig. 3-20-2)
(4) Check that the panel is attached tightly to the
ceiling.
●
At this time, make sure that there are no gaps
between the unit and the ceiling panel, or between
the ceiling panel and the ceiling surface. (Fig. 3-21)
●
If there is a gap between the panel and the ceil-
ing, leave the ceiling panel attached and make fine
adjustments to the installation height of the unit to
eliminate the gap with the ceiling. (Fig. 3-21)
CAUTION
●
●
If the screws are not sufficiently tight-
ened, trouble such as that shown in
the figure below may occur. Be sure
to tighten the screws securely.
If a gap remains between the ceiling surface and the ceiling panel
even after the screws are tightened,
adjust the height of the unit again.
Ceiling panel
Main unit
Ceiling surface
Washer head
screws
Ceiling panel
Fig. 3-21
The height of the unit can be adjusted from the
ceiling panel corner hole, with the ceiling panel
attached, to an extent that does not affect the
unit levelness, the drain hose, or other elements.
Do not allow
gaps
REF. PIPE
mark
Fig. 3-20-2
After completing the
wiring process, install
the supplied wiring cover
before installing the panel.
It is not possible to install
the wiring cover after
installing the panel.
DRAIN mark
Panel installation hole
(4 locations)
Insert a wrench
or other tool into
the corner cover
installation hole
and make fine
adjustments to
the unit nut.
Fig. 3-22
Air leakage
Air leakage from
ceiling surface
Staining
Condensation, water leakage
Adjust so that there are no gaps.
Fig. 3-23
32
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Page 33
3-6-3. Wiring the Ceiling Panel
(1) Open the cover of the electrical component box.
(2) Connect the 7P wiring connector (red) from the
ceiling panel to the connector in the unit electrical
component box. (Fig. 3-24)
●
If the connectors are not connected, the Auto flap will
not operate. Be sure to connect them securely.
●
Check that the wiring connector is not caught
between the electrical component box and the cover.
●
Check that the wiring connector is not caught
between the unit and the ceiling panel.
3-6-4. How to Attach the Corner & Air-Intake Grille
Attaching the corner cover and air-intake grille
A. Attaching the corner cover
(1) Check that the safety cord from the corner cover is
fastened to the ceiling panel pin, as shown in the
figure. (Fig. 3-25)
(2) Use the supplied screws to attach the corner cover
to the ceiling panel. (Fig. 3-25)
(Direction that the unit faces has been changed to
facilitate explanation.)
Electrical component
box cover
Ceiling panel
Screws
(3 locations)
Ceiling panel side
Mains side
Clamp
* Pass the wiring connector through the clamp to fasten it in place,
as shown in the figure.
wiring connector
Fig. 3-24
Pin
X
B. Attaching the air-intake grille
●
To install the air-intake grille, follow the steps for
Removing the grille in the reverse order. By rotating
the air-intake grille, it is possible to attach the grille
onto the ceiling panel from any of 4 directions.
Coordinate the directions of the air-intake grilles when
installing multiple units, and change the directions
according to customer requests. (Fig. 3-26)
●
When attaching the air-intake grille, be careful
that the flap lead wire does not become caught.
●
Be sure to attach the safety cord that prevents
the air-intake grille from dropping off to the
ceiling panel unit as shown in the figure at right.
●
With this ceiling panel, the directions of the air-intake
grille lattices when installing multiple units, and the
position of the label showing the company name on
the corner panel, can be changed according to
customer requests, as shown in the figure below.
However, the optional wireless receiver kit can only
be installed at the refrigerant-tubing corner of the
ceiling unit. (Fig. 3-27)
Locations of the air-intake grille catches at
the time the product is shipped.
* The grille can be installed with these
catches facing in any of 4 directions.
Unit drain hose side
Place the corner cover so that the 3 tabs
fit into the holes in the ceiling panel.
Then fasten it in place with the supplied screws.
Fig. 3-25
Hole for ceiling panel hook
Hook that prevents
the grille from dropping
Fig. 3-26
Unit refrigerant tube side
Optional wireless receiver kit
* Can only be installed
in this position.
Unit electrical component box
Can be installed rotated 90˚
Fig. 3-27
33
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Page 34
X
3-6-5. Checking After Installation
●
Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling
surface. Gaps may cause water leakage and condensation.
●
Check that the wiring is securely connected.
If it is not securely connected, the auto flap will not operate. (“P09” is displayed on the remote controller.) In addition,
water leakage and condensation may occur.
3-6-6. When Removing the Ceiling Panel for Servicing
When removing the ceiling panel for servicing, remove the air-intake grille and air filter, disconnect the wiring connector inside the electrical component box, and then remove the 4 mounting screws.
3-6-7. Adjusting the Auto Flap
The air-direction louver on the ceiling panel outlet can be adjusted as follows.
●
Adjust the louver to the desired angle using the remote controller. The louver also has an automatic air-sweeping
mechanism.
NOTE
●
Never attempt to move the louver by hand.
●
Proper air flow depends on the location of the air conditioner, the layout of the room and furniture, etc. If cooling or
heating seems inadequate, try changing the direction of the air flow.
3-7. Special Remarks
DC Fan Tap Change Procedure
Be sure to turn OFF the power (at mains) before beginning the work below.
(1) In the table below, check the field-supply parts that will be used. (If this setting is not made, the airflow may
decrease and condensation may occur.)
(2) Setting (a)
Open the cover of the electrical component box.
Setting
(a)
(b)
Setting (a): Go to (2).
Setting (b): Go to (3).
Air shield material (for use with 3-direction discharge)*
Air shield material (for use when a discharge duct is connected)*
Air shield material (for use with 2-direction discharge)*
Indoor unit control PCB
* Use field-supply air shield material.
* PCB model No.: CR-SXRP56B-B
Short the short-circuit pin TP3 (2P, yellow) on the
indoor unit control PCB. (Fig. 3-28)
(3) Setting (b)
Open the cover of the electrical component box.
Short the short-circuit pin TP6 (2P, white) on the
indoor unit control PCB. (Fig. 3-28)
Fig. 3-28
34
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Page 35
■ 4-Way Air Discharge Semi-Concealed Type (XM
Type)
3-8. Preparation for Suspending
This unit uses a drain pump. Use a carpenter’s level to check
that the unit is level.
3-9. Suspending the Indoor Unit
(1) Fix the suspension bolts securely in the ceiling using
the method shown in the diagrams, by attaching
them to the ceiling support structure, or by any other
method that ensures that the unit will be securely
and safely suspended. (Fig. 3-29)
(2) Follow the diagram to make the holes in the ceiling.
(3) Determine the pitch of the suspension bolts using
the supplied full-scale installation diagram. The diagram shows the relationship between the positions
of the suspension fitting, unit, and panel. (Fig. 3-30)
Hole-in-anchor
Hole-in-plug
Suspension bolt (M10 or 3/8")
(field supply)
Ceiling opening dimensions
21-1/32" Suspension bolt pitch
Concrete Insert
23-5/8"
Fig. 3-29
23-5/8"
21-1/32"
Suspension bolt pitch
Ceiling opening dimensions
XM
3-10. 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. 3-31)
Tubing and wiring must be laid inside the ceiling
when suspending the unit. If the ceiling is already
constructed, lay the tubing and wiring into position
for connection to the unit before placing the unit
inside the ceiling.
(2) The length of suspension bolts must be appropriate
for a distance between the bottom of the bolt and the
bottom of the unit of more than 19/32" as shown in
the diagram. (Fig. 3-31)
(3) Thread the 3 hexagonal nuts and 2 washers (field
supply) onto each of the 4 suspension bolts as
shown in the diagram. Use 1 nut and 1 washer for
the upper side, and 2 nuts and 1 washer for the
lower side, so that the unit will not fall off the suspension lugs. (Fig. 3-32)
(4) Adjust so that the distance between the unit and the
ceiling bottom is 33/64" to 45/64". Tighten the nuts
on the upper side and lower side of the suspension
lug. (Fig. 3-32)
(5) Remove the protective polyethylene used to protect
the fan parts during transport.
2-3/32"
1-49/64"
4-39/64" 1-49/64"
Power supply port
Over 19/32"
Supplied bolt
Nuts and washers
(used for upper and lower)
Double nut
22-41/64"
6-11/16"6-19/64"
Refrigerant tubing joint
(liquid side)
ø1/4 (flared)
Full-scale installation diagram
(printed on top of container box)
33/64" – 45/64"
Drain tube
connection port
(outer dia ø1-1/32")
8-15/32"
Suspension bolt
Suspension lug
11-9/641-3/16"
Fig. 3-30
33/64" – 45/64"
Fig. 3-31
Notch
Fig. 3-32
35
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Page 36
XM
3-11. Installing the Drain Piping
(1) Prepare standard hard PVC pipe (O.D. 1-1/32") for
the drain and use the supplied hose band to prevent
water leaks. (Fig. 3-33)
The PVC pipe must be purchased separately.
The transparent drain part on the unit allows you to
check drainage.
(2) Installing the drain hose
To install the drain hose, first place 1 of the 2 hose bands
●
over the unit drain port and the other hose band over the
hard PVC pipe (not supplied). Then connect both ends of
the supplied drain hose. (Fig. 3-33)
On the unit drain side, grasp the hose band with pliers and
●
insert the drain hose all the way to the base.
If other commercially available hose bands are used, the
●
drain hose may become pinched or wrinkled and there is
danger of water leakage. Therefore be sure to use the supplied hose bands. When sliding the hose bands, be careful
to avoid scratching the drain hose.
Do not use adhesive when connecting the supplied drain
●
hose to the drain port (either on the main unit or the PVC
pipe).
Reasons: 1. It may cause water to leak from the connec-
tion. Since the connection is slippery just
after the adhesive has been applied, the pipe
easily slips off.
2. The pipe cannot be removed when maintenance is needed.
Wrap the hose with the supplied drain hose insulation and
●
use the 4 twist ties so that the hose is insulated with no
gaps.
Do not bend the supplied drain hose 90° or more. The hose
●
may slip off.
NOTE
Make sure the drain pipe has a downward gradient (1/100 or
more) and that there are no water traps.
Twist tie
(4 ties, supplied)
Drain port
13/64"
5
63/64"
25 25
5-33/64"
Unit
CAUTION
CAUTION
Drain hose
insulation
(supplied)
13/64"
5
63/64"
140
Attach so that the hose band
●
fastener is on the side of the
drain port.
Attach the hose bands so that
●
each is approximately 13/64"
to 63/64" from the end of the
supplied drain hose.
Air bleeder prohibited
Do not install an air bleeder as
●
this may cause water to spray
from the drain pipe outlet.
Hard PVC pipe
(equivalent to
O.D. 1-1/32")
(Field supply)
Drain hose
(supplied)
Hose band
(2 bands, supplied)
Position to
fasten hose
bands
Fig. 3-33
CAUTION
In cases where it is necessary to raise the height of the
●
drain piping, the drain piping can be raised to a maximum height of 2.78 ft. above the bottom surface of the
ceiling. Under no conditions attempt to raise it higher
than 2.78 ft. above the bottom surface of the ceiling.
Doing so will result in water leakage. (Fig. 3-34)
Do not use natural drainage.
●
Do not install the pipe with an upward gradient from
●
the connection port. This will cause the drain water to
flow backward and leak when the unit is not operating.
(Fig. 3-35)
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. 3-36)
Provide insulation for any pipes that are run indoors.
●
36
1 ft. or less
2.78 ft. or less
* Length of supplied drain hose = 5-33/64"
Uphill slope
Support
bracket
Fig. 3-34
Fig. 3-35
Fig. 3-36
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Page 37
3-12. Checking the Drainage
After wiring and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water.
Water drain
(1) Connect power to the power terminal board (R, S
terminals) inside the electrical component box.
(2) Slowly pour approx. 0.13 gal of water into the drain
pan to check drainage. (Fig. 3-37)
(3) Short the check pin (CHK) on the indoor control
board and operate the drain pump. Check the water
flow through the transparent drain pipe and see if
there is any leakage.
(4) When the check of drainage is complete, open the
check pin (CHK) and remount the tube cover.
Be careful since the fan will start
CAUTION
when you short the pin on the
indoor control board.
3-13. How to Install the Ceiling Panel
Checking the unit position
(1) Check that the ceiling hole is within this range:
23-5/8" × 23-5/8"
(2) Confirm that the position of the indoor unit and the
ceiling as shown in the diagram. If the positions of
the ceiling surface and unit do not match, air leakage, water leakage, flap operation failure, or other
problems may occur.
CAUTION
Over
3-15/16"
Plastic container
for water intake
must be within the range of 33/64" to 45/64". (Fig. 3-38)
A
If not within this range, malfunction or other trouble may occur.
Water
(Approx. 0.13 gal)
Drain pan outlet
Fig. 3-37
Main unit
A
Ceiling side
Ceiling opening
dimension
Fig. 3-38
Flap
Fig. 3-39
Screw
XM
Never place the panel face-down. Either hang it verti-
●
cally or place it on top of a projecting object. Placing it
face-down will damage the surface.
Do not touch the flap or apply force to it. (This may
●
cause flap malfunction.)
3-13-1. Before Installing the Ceiling Panel
(1) Remove the air-intake grille and air filter from the
ceiling panel.
a) Slide the air-intake grille catches in the direction
shown by the arrows
to open the grille. (Fig. 3-40)
1
b) With the air-intake grille opened, remove the grille
hinge from the ceiling panel by sliding it in the
direction shown by the arrow
. (Fig. 3-41)
2
(2) Removing the corner cover
a) Remove the screws on the corner and slide the
latches in the direction of the arrow
to discon-
1
nect the hinges (3 locations). (Fig. 3-42) Then,
remove the air-intake grille in the direction of the
arrow 2. (Fig. 3-43)
Air-intake grille
Air-intake grille hinge
Corner cover
37
Latch
Ceiling panel
1
1
2
Fig. 3-40
Corner cover
1
Push
Ceiling panel
Fig. 3-42 Fig. 3-43
Fig. 3-41
2
1
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Page 38
XM
3-13-2. Installing the Ceiling Panel
The power must be turned ON in order to change the flap
angle. (Do not attempt to move the flap by hand. Doing so
may damage the flap.)
(1) Hang the temporary latches on the inside of the ceil-
ing panel to the receptacle on the unit to temporarily
attach the ceiling panel in place. (Fig. 3-44)
The ceiling panel must be installed in the correct direction
●
relative to the unit. Align the REF. PIPE and DRAIN marks
on the ceiling panel corner with the correct positions on the
unit.
(2) Align the panel installation holes and the unit screw
holes. (Fig. 3-45)
(3) Tighten the supplied washer head screws at the
4 panel installation locations so that the panel is
attached tightly to the unit.
(4) Check that the panel is attached tightly to the ceil-
ing. (Fig. 3-46)
At this time, make sure that there are no gaps between the
●
unit and the ceiling panel, or between the ceiling panel and
the ceiling surface.
If there is a gap between the panel and the ceiling, leave
●
the ceiling panel attached and make fine adjustments to
the installation height of the unit to eliminate the gap with
the ceiling.
Temporary
latch
Ceiling panel
Washer head screws
Ceiling surface
Temporary latches
Refrigerant tubing joint
REF. mark
Panel installation hole
(4 locations)
Main unit
Ceiling panel
Fig. 3-44
Drainage check
DRAIN mark
Fig. 3-45
Do not allow
gaps
Fig. 3-46
CAUTION
If a gap remains between the ceil-
If the screws are not sufficiently tight-
●
ened, trouble such as that shown in
the figure below may occur. Be sure to
tighten the screws securely.
Air leakage
Air leakage from
ceiling surface
Staining
Condensation, water leakage
●
ing surface and the ceiling panel
even after the screws are tightened,
adjust the height of the unit again.
Adjust so that there are no gaps.
3-13-3. Wiring the Ceiling Panel
(1) Open the cover of the electrical component box for
control PCB.
(2) Connect the 7P wiring connector (red) from the ceil-
ing panel to the connector on the control PCB in the
unit electrical component box. (Fig. 3-48)
If the connectors are not connected, the Auto flap will not
●
operate. Be sure to connect them securely.
Check that the wiring connector is not caught between the
●
electrical component box and the cover.
Check that the wiring connector is not caught between the
●
unit and the ceiling panel.
Fig. 3-47
(Direction that the unit faces has been changed to facilitate
explanation.)
Electrical component box cover
Screws
(3 locations)
Fig. 3-48
Ceiling panel wiring connector
* Pass the wiring connector through the clamp to fasten it in place,
as shown in the figure.
38
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Page 39
3-13-4. How to Attach the Corner & Air-Intake Grille
Attaching the corner cover and air-intake grille
A. Attaching the corner cover
(1) Check that the safety cord from the corner cover is
fastened to the ceiling panel pin, as shown in the figure. (Fig. 3-49)
(2) Use the supplied screws to attach the corner cover
to the ceiling panel.
B. Attaching the air-intake grille
To install the air-intake grille, follow the steps for Removing
●
the grille in the reverse order. By rotating the air-intake
grille, it is possible to attach the grille onto the ceiling panel
from any of 4 directions. Coordinate the directions of the
air-intake grilles when installing multiple units, and change
the directions according to customer requests. (Fig. 3-50)
When attaching the air-intake grille, be careful that the
●
flap lead wire does not become caught.
Be sure to attach the safety cord that prevents the air-
●
intake grille from dropping off to the ceiling panel unit
as shown in the figure at right.
With this ceiling panel, the directions of the air-intake grille
●
lattices when installing multiple units, and the position of the
label showing the company name on the corner panel, can
be changed according to customer requests, as shown in
the figure below. However, the optional wireless receiver kit
can only be installed at the refrigerant-tubing corner of the
ceiling unit. (Fig. 3-51)
Refrigerant tube side
Optional wireless receiver kit
* Only this area is possible
for installation.
Electrical component box
for power PCB
Locations of air-intake grille hinges
Pin
Place the corner cover so that the 3 tabs
fit into the holes in the ceiling panel.
Then fasten it in place with the supplied screws.
Hole for ceiling
panel hook
Hook that prevents
the grille from
dropping
* The grille can be installed
with these hinges facing
in any of 4 directions.
Drain pipe side
XM
Fig. 3-49
Fig. 3-50
Can be installed rotated 90°
Fig. 3-51
Electrical component box for control PCB
3-13-5. Checking After Installation
Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling surface.
●
Gaps may cause water leakage and condensation.
Check that the wiring is securely connected.
●
If it is not securely connected, the auto flap will not operate. (“P09” is displayed on the remote controller.) In addition, water leakage and condensation may occur.
3-13-6. When Removing the Ceiling Panel for Servicing
When removing the ceiling panel for servicing, remove the air-intake grille and air filter, disconnect the wiring connector inside the
electrical component box, and then remove the 4 mounting screws.
3-13-7. Adjusting the Auto Flap
The air-direction louver on the ceiling panel outlet can be adjusted as follows.
Adjust the louver to the desired angle using the remote controller. The louver also has an automatic air-sweeping mechanism.
●
NOTE
Never attempt to move the louver by hand.
●
Proper air flow depends on the location of the air conditioner, the layout of the room and furniture, etc. If cooling or heating seems
●
inadequate, try changing the direction of the air flow.
39
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Page 40
1-Way Air Discharge Semi-Concealed Type (A Type)
■
3-14. Suspending the Indoor Unit
(1) Follow the diagrams to make the holes in the ceiling.
(Figs. 3-52 and 3-53)
(2) Depending on the ceiling type:
●
Insert suspension bolts as shown in Fig. 3-54
or
●
Use existing ceiling supports or construct a suitable
A
support as shown in Fig. 3-55.
●
Make sure that the length of suspension bolts from the
bottom of the unit is 19/32 in. or more. (Fig. 3-56)
29-59/64 (Panel outer dimensions)
28-47/64 (Ceiling opening dimension)
1-27/64
25-63/64 (Suspension bolt pitch)
22-3/64
23-5/8
Fig. 3-52
(1-27/64)
19/32
15-3/4 (Suspension bolt pitch)
23-15/64 (Ceiling opening dimension)
24-13/32 (Outline dimension of panel)
19/32
3-47/64
Unit: in.
WARNING
It is important that you use extreme care in
supporting the indoor unit from the ceiling. Ensure
that the ceiling is strong enough to support the
weight of the unit. Before hanging the unit, test the
strength of each attached suspension bolt.
(3) Calculate the suspension bolt pitch using the full-
size installation diagram (printed on the package).
The relationship between the positions of the
suspension lugs, unit, and ceiling panel is as
shown in Fig. 3-53.
(4) Cut the ceiling material, if necessary.
(Figs. 3-52 and 3-53)
If the system requires fresh air to be drawn into the unit,
cut and remove the insulation (both externally and
internally) at the location shown as
A
in Figs. 3-57 and
3-58.
CAUTION
5-19/64 1-49/64
2-31/64
9-29/64
3-3/16
Flared refrigerant
connection outlet
(liquid tube)
Hole-in-anchor
Hole-in-plug
Drain pipe connection
(Be sure to connect the supplied flexible hose.)
22-3/64
10-1/32
Flared refrigerant
connection outlet
(gas tube)
1-19/64
2-9/16
1-49/64
12-19/64
Inter-unit
Control Wiring
Power supply outlet
Fig. 3-53
Concrete
Suspension bolt
(M10 or 3/8")
Insert
Fig. 3-54
1-3/16
Unit: in.
When making the cuts to the insulation, be careful
not to damage the drain pan.
Ceiling tiles
Ceiling support
Fig. 3-55
40
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Page 41
3-15. Placing the Unit Inside the Ceiling
Full-scale
installation diagram
CAUTION
Be sure to use a level gauge
and confirm that the unit is
level. If it is not level, water
leakage may occur.
(1) Use the supplied M5 or 3/16" screws (4) to attach
the full-size installation diagram to the indoor unit
suspension lugs, in order to obtain the ceiling
opening dimensions for suspending the unit. (Fig.
3-56)
Caution: Piping and wiring work must be performed
inside the ceiling after the unit is suspended.
Therefore if the ceiling is already installed, the
wiring and piping work should be completed
up to the connection points prior to
suspending the unit.
(2) Attach the special washers (supplied) and nuts (field
supply) to the suspension bolts (4 locations).
CAUTION
Suspension
lug
25/32 – 1 in.
For fresh air intake
(ø3-15/16 hole)
6-11/16
Fig. 3-56
A
Fig. 3-57
For fresh air intake
(ø3-15/16 hole)
over 19/32 in.
A
3-5/32
6-11/16
Unit: in.
A
●
Use M10 or 3/8" nuts.
●
The length of the suspension bolts must be such that
there is a space of at least 19/32 in. below the bottom
of the suspension lugs, as shown in Fig. 3-56. If the
length of the suspension bolts is too long, the bolts
may interfere with the ceiling panel and louver motor,
preventing their installation.
(3) Thread the 3 hexagonal nuts and 2 washers (field
supply) onto each of the 4 suspension bolts as
shown in Fig. 3-59. Use 1 nut and 1 washer for the
upper side, and 2 nuts and 1 washer for the lower
side, so that the unit will not fall off the suspension
lugs.
(4) Lift up the indoor unit and fit the suspension bolts
into the notches in the suspension lugs.
(5) Adjust so that the distance between the bottom of
the indoor unit suspension lugs and the bottom of
the ceiling panel is 25/32-1 in. Then tighten the nuts
above and below each suspension lug. The
full-size installation diagram can be used to help
adjust the height of the indoor unit.
8-1/16
Nuts and washers
(Used above and below.)
Double nuts
over 19/32 in.
Unit: in.
Fig. 3-58
Suspension bolt
Suspension lug
Notch
25/32-1 in.
Fig. 3-59
41
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Page 42
CAUTION
●
The indoor unit includes a drain pump. Be sure to
use a level gauge and verify that the unit is level.
●
Before inserting the ceiling material, complete
as much of the drain piping work and refrigerant
tubing work as possible.
19/32
2-1/8
Suspension bolts
Tubing side
2-1/8
(6) The distance between the unit and the opening of
A
the ceiling and the distance between the bottom
surface of the ceiling and the bottom surface of the
flange of the unit should follow the dimensions given
in Figs. 3-60 and 3-61.
3-16. Installing the Drain Piping
(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for
the drain and use the supplied drain hose and hose
band to prevent water leaks.
The PVC pipe must be purchased separately. The
unit’s transparent drain port allows you to check
drainage. (Fig. 3-62)
CAUTION
●
Do not use adhesive at the drain connection port on
the indoor unit.
●
Insert the drain pipe until it contacts the socket, as
shown in the figure at right, then secure it tightly with
the hose band.
●
Tighten the hose clamps so their locking nuts face
upward. (Fig. 3-62)
●
Do not use the supplied drain hose bent at a 90°
angle. (The maximum permissible bend is 45°.)
●
Check the drainage at the unit drain port
(transparent).
Suspension bolts
19/32
Fig. 3-60
25/32
25/32
Fig. 3-61
Align the hose band with end of the
hose, and tighten so that it does not
contact the bead.
Drainage check
section on drain port
(transparent)
Bead
Drain hose
(supplied)
Fig. 3-62
Drain insulator (supplied)
Ceiling
material
25/32
Hard PVC
socket VP-25
(not supplied)
Packing (supplied)
Unit: in.
Hard PVC
pipe
VP-25
(not supplied)
PVC adhesive
(2) After checking the drainage, wrap the supplied
packing and drain pipe insulator around the pipe,
then secure it with the supplied clamps. (Fig. 3-63)
Fig. 3-63
NOTE
Make sure the drain pipe has a downward gradient
(1/100 or more) and that there are no water traps.
42
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Page 43
CAUTION
●
Do not install an air bleeder as this may cause water
to spray from the drain pipe outlet. (Fig. 3-64)
●
In cases where it is necessary to raise the height of
the drain piping, the drain piping can be raised to a
maximum height of 33-15/32" above the bottom
surface of the ceiling. Under no conditions attempt to
raise it higher than 33-15/32" above the bottom
surface of the ceiling. Doing so will result in water
leakage. (Fig. 3-65)
●
Do not use natural drainage.
●
Do not install the pipe with an upward gradient from
the connection port. This will cause the drain water
to flow backward and leak when the unit is not
operating. (Fig. 3-66)
●
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. 3-67)
●
Provide insulation for any pipes that are run indoors.
Air bleed valve
Fig. 3-64
A
11-13/16 in. or less
33-15/32 in. or less
0 – 45°
* Length of supplied drain hose = 9-27/32 in.
Fig. 3-65
Uphill slope
Fig. 3-66
3-17. Checking the Drainage
After wiring and drain piping are completed, use the
following procedure to check that the water will drain
smoothly. For this, prepare a bucket and wiping cloth to
catch and wipe up spilled water.
(1) Connect power to the power terminal board (R, S
terminals) inside the electrical component box.
(2) Slowly pour approx. 0.2 gal of water into the drain pan
using a siphon pump through the air outlet grille. (Fig.
3-68)
(3) Short the check pin (CHK) on the indoor control board
and operate the drain pump. Check the water flow
through the transparent drain pipe and see if there is any
leakage.
CAUTION
Be careful since the fan will start
when you short the pin on the indoor
control board.
(4) When the drainage check is complete, open the check
pin (CHK) and remount the insulator.
Support
bracket
Fig. 3-67
Drainage check
Discharge port
water (approx. 0.2 gal)
Fig. 3-68
Drain tube
connection
(transparent)
CAUTION
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The bottom drain port is for use
only during test runs and servicing
inspections. Do not connect the drain
pipe to the bottom drain port.
43
Page 44
3-18. Electrical Power Wiring
(1) Wiring connections
The power inlet is on the side of the indoor unit where the
refrigerant tubing is located. The electrical component box
is on the lower air intake surface of the indoor unit.
(Fig. 3-69)
(2) Wiring
Refrigerant tubing joint
(gas tube)
Refrigerant tubing joint
(liquid tube)
Drain pipe connection
(Be sure to connect the
supplied flexible hose.)
Inter-unit Control Wiring
Power supply outlet
A
●
Route the power wiring into the indoor unit through the power inlet on the side of the unit. At this time, be
WARNING
sure that the wiring passes through the power inlet in the unit power section. If the wiring does not pass
through this inlet, it may become pinched by the ceiling panel, and may result in fire.
●
Pass the wiring through the power inlet on the electrical component box and connect it to the terminal plate.
Then fasten the wiring in place with the clamp.
3-19. How to Install the Ceiling Panel
Component Parts
Part name Quantity Appearance Part name Quantity Appearance
Ceiling panel
1
3-19-1. Before Installing the Ceiling Panel
Checking the position of the indoor unit
(1) Check that the dimensions of the ceiling opening are
the following:
Washer-head
screw
Screw
Be sure that this distance is within the range of 25/32 – 1 in.
If it is not within this range, malfunction or other problems may result.
Fig. 3-69
"
4
2
ø11/16
4 s12 or 5/32" s15/32"
For fastening
side panel
M5 s40
or
5/16" s9/16"
28-47/64" × 23-17/64"
* For details, refer to the installation manual that was
supplied with the indoor unit.
(2) Check that the positions of the ceiling surface and
indoor unit are as shown in Fig. 3-70. If the positions
of the ceiling surface and indoor unit are not correct,
problems such as air leakage, water leakage, and flap
operation trouble may occur.
●
Do not rest the panel facing downwards, lean up against
a wall, or leave it sitting on top of a protruding object.
Doing so may scratch the panel surface.
●
Do not apply excessive force to the flap. (Fig. 3-71)
(Doing so may damage the flap.)
44
25/32 – 1 in.
Ceiling surface
Indoor unit
Ceiling opening dimension
Fig. 3-70
Flap
Fig. 3-71
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Page 45
Removing the intake grille
Slide the intake grille hooks (2
locations) in the direction of the
arrow to open the intake grille.
(Fig. 3-72)
When the intake grille is open,
press a flathead screwdriver against
the rear tabs (2 locations) and pull
out the intake grille. (Fig. 3-73)
Removing the side panel
Grasp the finger grip on the side
panel and slide the panel in the
direction of arrow
to remove the
1
panel. (Fig. 3-74)
(There are 2 panels: 1 each on the
left and right sides.)
Press on the tabs with a flathead (minus)
screwdriver while pulling out the intake grille.
Fig. 3-72
Fig. 3-73
Slide
Hinge
Screw
Hook
Screw
Intake grille
A
Tab
1
Slide
Side panel
Fig. 3-74
3-19-2. Installing the ceiling panel
(1) Fasten the hooks on both sides of the ceiling panel to
the indoor unit. The hooks on one side (2 locations)
are stationary, while the hook on the other side is
moveable. (Fig. 3-75)
(2) Angle the panel somewhat and fasten the stationary
hook into the fastener on the side of the unit.
(3) After verifying that the hook is fastened, press the
other end up until the ceiling panel is level. Then
press upwards until the moveable hook is fastened
into the fastener on the unit.
(4) Verify that the hooks on both sides of the ceiling
panel are securely fastened to the unit. If the hooks
are not securely fastened, the panel may fall. At this
point, the panel is now provisionally fastened to the
unit.
●
When removing the panel, press the movable hook
toward the inside while supporting the panel.
(Fig. 3-76)
Stationary hook
Fig. 3-75
Hook receiver
Moveable hook
Moveable hook
Press to remove.
Fig. 3-76
45
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Page 46
A
(5) Align the installation holes on the panel with the bolt
holes on the unit.
(6) Insert the supplied washer head bolts into the 4
panel installation holes, and tighten until the panel is
securely fastened against the unit. (Fig. 3-77)
(7) Verify that the panel is securely fastened against the
unit.
At this time, make sure that there is no gap between
●
the indoor unit and the ceiling panel, or between the
ceiling panel and the ceiling surface. (Fig. 3-78)
If there is a gap between the ceiling panel and the
●
ceiling, leave the panel attached and adjust the
installation height of the indoor unit upwards until
the gap with the ceiling is eliminated. (Fig. 3-79)
If the adjustment is small enough that it will not
●
affect the levelness of the indoor unit or the drain
piping, then the unit height can be adjusted from the
side panel installation holes, with the ceiling panel
still attached.
Indoor unit
Ceiling panel
Washer-head screw
Fig. 3-77
Indoor unit
Ceiling surface
Fig. 3-78
CAUTION
• If the screws are not fully tightened,
problems such as those shown below
may occur. Be sure to tighten the
screws securely.
Air leakage
Ceiling panel
air leakage
Stains
Condensation and water leakage
Must be no gap.
Ceiling panel
Insert a wrench or other
standard tool into the side
panel installation holes
and make fine adjustments
to the indoor unit nuts.
Fig. 3-79
• If there is a gap between the ceiling
surface and the ceiling panel even
when the screws are fully tightened,
readjust the height of the indoor unit.
(Fig. 3-79)
Adjust so that there is no gap.
46
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Page 47
3-19-3. Wiring the ceiling panel
(1) Loosen the 2 screws on the electrical component
box lid, and remove the lid. (Fig. 3-80)
(2) Fasten the wiring connector (7P, red) which comes
out from the ceiling panel using the lead wire clamps
(2 locations) on the unit. Then connect it to the
connector (7P, red) inside the indoor unit electrical
component box. (Fig. 3-81)
●
If the connector is not connected, “P09” is displayed
on the remote controller, and the automatic flap will
not operate. Be sure to securely connect the connector.
●
Check that the wiring connector is not pinched
between the electrical component box and the lid.
●
Check that the wiring connector is not pinched
between the indoor unit and the ceiling panel.
3-19-4. Installing the side panel and intake grille
A. Installing the side panel
(1) Grasp the side panel finger grip and slide the panel
in the direction of the arrow to install the side panel.
(Fig. 3-82)
(2) Fasten the side panel onto the ceiling panel using
the supplied screws (4 × 12 or 5/32" × 15/32").
B. Installing the intake grille
●
To install the intake grille, follow the procedure for
removing it in the reverse order. (Fig. 3-83)
●
When installing the intake grille, be careful that the
flap lead wire does not become pinched. (Fig. 3-83)
3-19-5. Others
Screws
Electrical component box
Indoor unit connector
Tabs
Fig. 3-80
Fig. 3-81
Electrical component
box cover
Inter-unit control wiring
Power supply outlet
Fasten with screws
(4 s12 or 5/32" s15/32")
Tab
Slide
A
A. Check after installation
●
Check again that there is no gap between the indoor
unit and the ceiling panel, or between the ceiling
panel and the ceiling surface.
* If there is a gap, then water leakage and condensa-
tion may occur.
●
Check that the wiring connections are secure.
* If the wiring is not connected, the automatic flap will
not operate. (“P09” is displayed on the remote
controller.) In addition, water leakage,
condensation, and other problems may occur.
B. If a wireless remote controller is used
●
For details concerning the installation procedure,
refer to the installation manual which was supplied
with the optional wireless remote controller and
indoor unit internal receiver.
47
Slide the side panel so that the side panel tabs are fastened to
the ceiling panel. Then fasten in place with the supplied screws
(4 s12 or 5/32" s15/32").
Fig. 3-82
Screw
Screw
Fig. 3-83
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Page 48
Concealed Duct Type (U Type)
■
3-20. Required Minimum Space for
Installation and Service
●
This air conditioner is usually installed above the ceiling so that the
indoor unit and ducts are not visible. Only the air intake and air outlet
ports are visible from below.
●
The minimum space for installation and service is shown in
Fig. 3-84 and Table 3-3.
●
It is recommended that space is provided (17-23/32 × 17-23/32 in.)
for checking and servicing the electrical system.
●
Fig. 3-85 and Table 3-4 show the detailed dimensions of the indoor
unit.
Table 3-3
U
Type
A (Length)
30-23/32 (780)
Number of duct flanges
Table 3-4
Dimension
Type
7, 12, 18
24 37-7/8
36
ABCDEFGH I JK
26-1/16
56-25/32
23-5/8
(7-7/8 s 3)
35-7/16
(7-3/32 s 5)
54-11/32
(9-1/16 s 6)
A (Suspension bolt pitch)
Min.
9-27/32
22-27/32
Air outlet duct flange
Indoor unit
Min.
Min.
15-3/4
9-27/32
Electrical
component box
Min. 25-19/32
Fig. 3-84
Unit: in. (mm)
7, 12, 18
24
42-17/32 (1,080)
2
3
27-9/16 30-23/32 11-13/32 10-5/16 26-25/32 28-5/32 7-3/32 – 13-3/8 8 12
39-3/8 42-17/32 11-13/32 10-23/32 38-19/32 39-31/32 5-1/8
58-9/32 61-13/32 13-3/16 12-7/32 57-15/32 58-27/32 5-1/8
36
61-13/32 (1,560)
4
9-21/32
(9-21/32 s 1)
19-9/32
(9-21/32 s 2)
9-27/32 12 16
9-7/16 16 18
Inspection
access
17-23/32
17-23/32
Refrigerant
tubing
Unit: in.
Unit: in.
No. of holes
LM
2-5/322-5/32
7-7/8
10-1/4
(O.D.)
31/32
10-13/16
(Ceiling opening dimension)
3-17/32
7-9/32
(Suspension bolt pitch)
13/32
13/32
13/32
3-15/32
3-15/16
1-7/32 1-7/32
22-27/3231/32
L-ø1/4
(Hole)
I
(Suspension bolt pitch)
EEEF
A (O.D.)
H (Duct suspension bolt pitch)
G (Ceiling opening dimension)
B
C
D
IJJK
3/43/4
1-9/16
13/32
11
4-ø15/32
(Hole)
18-ø1/8
(Hole)
Inspection access
(17-23/32
17-23/32)
(Field supply)
(5-29/32)
2-15/16
2-9/16
Refrigerant tubing joint (liquid tube)
Refrigerant tubing joint (gas tube)
Upper drain port (O.D. 1-1/4 in.)
Bottom drain port (O.D. 1-1/32 in.)
Suspension lug
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)
Tube cover
Electrical component box
Flange for the air intake duct
(Option or field supply)
Inter-unit control wiring
12-7/32
4-17/32
31/32 8-9/32
13/32
24-13/16 31/32
1-3/16
6-5/16
2-3/4
31/32
2-3/4
3-11/32
Inspection access panel
5-1/8
11-7/32
Ceiling
31/32
6-7/8
1-3/8
7-15/32
10
9
Unit: in.
Fig. 3-85
48
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Page 49
3-21. Suspending the Indoor Unit
Depending on the ceiling type:
• Insert suspension bolts as shown in Fig. 3-86
or
• Use existing ceiling supports or construct a suitable support as
shown in Fig. 3-87.
WARNING
It is important that you use extreme care
in supporting the indoor unit inside the
ceiling. Ensure that the ceiling is strong
enough to support the weight of the unit.
Before hanging the unit, test the strength
of each attached suspension bolt.
(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. 3-84 and Table 3-3)
Tubing must be laid and connected inside the ceiling when
suspending the unit. If the ceiling is already constructed, lay the
tubing into position for connection to the unit before placing the
unit inside the ceiling.
(2) Screw in the suspension bolts allowing them to protrude from
the ceiling as shown in Fig. 3-86. (Cut the ceiling material, if necessary.)
Hole-in-anchor
Hole-in-plug
Suspension bolt (M10 or 3/8")
(field supply)
Nuts and washers
(use for upper and lower)
Concrete Inser t
Fig. 3-86
Ceiling tiles
Ceiling suppor t
U
Fig. 3-87
Suspension bolt
Suspension lug
(3) Thread the 3 hexagonal nuts and 2 washers (field supply) onto
each of the 4 suspension bolts as shown in Figs. 3-88 and 3-89.
Use 1 nut and 1 washer for the upper part, and 2 nuts and 1
washer for the lower part, so that the unit will not fall off the
suspension lugs.
●
Fig. 3-90 shows an example of installation.
Bolt anchor
Air outlet duct
Air-outlet grille
Ceiling material Indoor unit
Double nuts
Suspension bolt
Air-intake duct
Notch
Fig. 3-88
Suspension bolt
Hexagonal nut
Double nuts
Fig. 3-89
Air-intake grille
Fig. 3-90
49
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Page 50
3-22. Installing the Drain Piping
CAUTION
(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for the drain
and use the supplied hose band to prevent water leaks.
The PVC pipe must be purchased separately.
The transparent drain part on the unit allows you to check
drainage. (Fig. 3-91)
CAUTION
Align the hose band with end of the
hose, and tighten so that it does not
contact the bead.
Drainage check
section on drain port
(transparent)
Drain hose
(supplied)
Hard PVC
socket VP-25
(not supplied)
Hard PVC
pipe
VP-25
(not supplied)
●
Do not use adhesive at the drain connection port on the
indoor unit.
●
Insert the drain pipe until it contacts the socket, as shown in
the figure at right, then secure it tightly with the hose band.
U
●
Do not use the supplied drain hose bent at a 90° angle.
(The maximum permissible bend is 45°.)
●
Tighten the hose clamps so their locking nuts face upward.
(Fig. 3-91)
(2) After connecting the drain piping securely, wrap the supplied
packing and drain pipe insulator around the pipe, then secure it
with the supplied vinyl clamps. (Fig. 3-92)
NOTE
Make sure the drain pipe has a downward gradient (1/100 or more)
and that there are no water traps.
●
Do not install an air bleeder as this may
cause water to spray from the drain pipe
outlet. (Fig. 3-93)
●
If it is necessary to increase the height of the drain pipe, the
section directly after the connection port can be raised a
maximum of 19-11/16". Do not raise it any higher than
19-11/16", as this could result in water leaks. (Fig. 3-94)
●
Do not install the pipe with an upward gradient from the connec-
tion port. This will cause the drain water to flow backward and leak
when the unit is not operating. (Fig. 3-95)
●
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. 3-96)
Prohibited
Good
Prohibited
Bead
Packing (supplied)
Fig. 3-91
Drain insulator (supplied)
Vinyl clamps
Fig. 3-92
Air bleeder
Fig. 3-93
11-13/16" or less
19-11/16" or less
Fig. 3-94
Upward gradient
PVC adhesive
3-23. Checking the Drainage
After wiring and drain piping are completed, use the following proce-
Fig. 3-95
dure to check that the water will drain smoothly. For this, prepare a
bucket and wiping cloth to catch and wipe up spilled water.
Support pieces
(1) Connect power to the power terminal board (R, S terminals)
inside the electrical component box.
(2) Remove the tube cover and through the opening, slowly pour
approx. 0.3 gal of water into the drain pan to check drainage.
(3) Short the check pin (CHK) on the indoor control board and oper-
Fig. 3-96
ate the drain pump. Check the water flow through the transparent
drain port and see if there is any leakage.
50
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CAUTION
Be careful since the fan will start when you
short the pin on the indoor control board.
(4) When the check of drainage is complete, open the check pin (CHK)
and remount the insulator and drain cap onto the drain inspection port.
3-24. 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.
Power supply outlet
Inter-unit control wiring
(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
Fig. 3-98.
(5) Place the cable neatly in the box and reinstall the cover
plate.
Electrical component box
Fan
motor
Booster cable
Booster cable
Fan motor socket
(At shipment) (Booster cable installed)
Fig. 3-98
How to read the diagram
The vertical axis is the external static pressure (in. WG)
while the horizontal axis represents the air flow (CFM).
The characteristic curves for “HT,” “H,” “M” and “L” fan
speed control are shown. The nameplate values are
shown based on the “H” air flow. For the 24 type, the air
flow is 635 CFM, while the external static pressure is
0.20 in. WG at “H” position. If external static pressure is
too great (due to long extension of ducts, for example),
the air flow volume may drop too low at each air outlet. This problem may be solved by increasing the fan
speed as explained above.
Indoor Fan Performance
(in. WG)
0.60
0.40
Limit line
Limit line
0.20
External Static Pressure
0
177
Air Flow (CFM) Air Flow (CFM)
(in. WG)
0.60
0.40
0.20
External Static Pressure
24 Type
Limit line
Limit line
L
0
Air Flow (CFM) Air Flow (CFM)
HT
H
M
L
353
HT
H
M
706353
Fig. 3-97
(in. WG)
0.60
0.40
Limit line
Limit line
0.20
External Static Pressure
0
(in. WG)
0.60
Limit line
0.40
Limit line
0.20
External Static Pressure
0
706
U
18 Type 7, 12 Type
HT
H
M
L
530353
36 Type
HT
H
M
L
1059
NOTE
HT: Using the booster cable
H: At shipment
Fig. 3-99
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Concealed Duct High-Static Pressure Type (D Type)
■
3-25. Required Minimum Space for Installation and
Service
●
This air conditioner is usually installed above the ceiling
so that the indoor unit and ducts are not visible. Only the
air intake and air outlet ports are visible from below.
●
The minimum space for installation and service is shown
in Fig. 3-100.
●
It is recommended that space be provided (23-5/8" ×
23-5/8") for checking and servicing the electrical system.
●
Fig. 3-101 and Table 3-3 show the detailed dimensions of
the indoor unit.
D
37
38-37/64
Suspension
bolt pitch
Inspection access
(23-5/8" × 23-5/8")
Drain pan
Ceiling face
5-1/8
19-11/16
11-27/64
Suspension
bolt pitch
Electrical
component
box
Fig. 3-100
Min. 23-5/8
(Space for service)
Air suction side
Refrigerant tubing
Min. 23-5/8
Space for
service
Min. 22-53/64
Min. 5-1/8
Unit: in.
Table 3-5
Length
Type
36
48
16-17/32
17-23/32
1
2-5/322-5/32
A
12-13/64
A
B
15-35/64
16-47/64
2-43/64
3-55/64
24-13/32
19-11/16 2-3/4
Unit: in.
C
16 - ø1/8
(Hole for full
circumference)
25/6425/64
37
31-7/32
7 s3-15/16 = 27-9/16
22 - ø1/8
(Hole for full
circumference)
5-1/8
(Suspension bolt pitch)
3-5/32 11-27/64
19/32
1-3/8 1-3/8
1-31/32
2-5/32
B
11-13/16
1-13/16
(Suspension bolt pitch)
38-37/64
19-11/16
39-49/64
37
2-5/32
1-37/64
1-57/64
4 s3-15/16
= 15-3/4
25/32
3-35/64
2-23/64
Electrical component box
4-ø20 hole for
suspension bolt
Refrigerant liquid line (ø3/8 or ø1/4)
Refrigerant gas line (ø3/4 or ø5/8)
Power supply outlet
19/32
Drain connection (25A, O.D. 1-1/4")
Duct connection for suction
Duct connection for discharge
Inter-unit control wiring
3-15/16
3-15/16
3-55/64
1-11/32
3-15/16
Drain pan
3-15/16
Unit: in.
Fig. 3-101
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3-26. Suspending the Indoor Unit
Depending on the ceiling type:
●
Insert suspension bolts as shown in Fig. 3-102
or
●
Use existing ceiling supports or construct a suitable support as
shown in Fig. 3-103.
WARNING
It is important that you use extreme care
in supporting the indoor unit inside the
ceiling. Ensure that the ceiling is strong
enough to support the weight of the unit.
Before hanging the unit, test the strength
of each attached suspension bolt.
(1) When placing the unit inside the ceiling, determine the pitch
of the suspension bolts referring to the dimensional data given
previously. (Figs. 3-100 and 3-101)
Tubing must be laid and connected inside the ceiling when
suspending the unit. If the ceiling is already constructed, lay
the tubing into position for connection to the unit before placing
the unit inside the ceiling.
Hole-in-anchor
Hole-in-plug
Concrete Insert
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-102
Ceiling tiles
Ceiling suppor t
D
Fig. 3-103
(2) Screw in the suspension bolts allowing them to protrude from
the ceiling as shown in Fig. 3-102. (Cut the ceiling material, if
necessary.)
(3) Suspend and fix the indoor unit using the 2 hexagonal nuts
(field supply) and special washers (supplied with the unit) as
shown in Fig. 3-104.
Air-outlet grille
Air-intake grille
Hexagonal nuts
and washers
(2 sets)
"
– 1-31/32
"
25/32
Fig. 3-104
Suspension bolt
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Page 54
3-27. Installing the Drain Piping
(1) Prepare standard hard PVC pipe (O.D. 1-1/4") for the
drain and use the supplied drain socket to prevent water
leaks. The PVC pipe must be purchased separately.
When doing this, apply adhesive for the PVC pipe at the
connection point.
(2) If connecting a drain joint (supplied) to the threaded
drain port, first wrap the drain port threads with sealing
tape, then connect the joint. (Fig. 3-105)
(3) After connecting the drain pipe securely, wrap insulator
(field supply) around the pipe.
(4) Ensure the drain pipe has a downward gradient (1/100
or more) and prepare traps as indicated in Fig. 3-106.
(5) Also, in another part of the pipe arrangement, prepare
traps with an inspection plug to clean dust or debris that
may cause leaking of water. (Fig. 3-107)
(6) After connecting the drain piping, slowly pour water into
D
the drain pan to check that the water drains smoothly.
3-28. Caution for Ducting Work
●
This unit has high static pressure (applicable external static pressure Max. 0.68 – 0.88 in. WG. In the case of small
pressure resistance (for instance, a short duct), install a
damper for adjusting air flow volume as air flow volume /
air flow noise increases.
●
If the air conditioner is to be installed in a room such
as an office or meeting room which needs a low sound
level, provide a supply and return noise absorption
chamber with an acoustic liner.
●
Include an air filter (field supply) at the return duct.
3-29. Indoor Fan Performance
How to Read the Diagram
The vertical axis is the External Static Pressure
(in. WG) while the horizontal axis represents the
Air Flow (CFM). The characteristic curve for the
“H,” “Med,” and “Lo” fan speed control.
The nameplate values are shown based on the
“H” air flow. Therefore in the case of 36 Type,
the flow is 1059 CFM, while the External Static
Pressure is 0.72 in. WG at “H” position. If the
external static pressure is too great (due to long
extension of duct, for example), the air flow
volume may drop too low at each air outlet. (Fig.
3-108)
(in. WG)
1.00
0.80
Limit line
0.60
0.40
External Static Pressure
0.20
0
36 Type 48 Type
M
L
883 1059 1236
Air Flow (CFM) Air Flow (CFM)
Drain pan
H
Limit line
Drain opening
(25A or 1-11/32
Fig. 3-105
Good
Not good
Fig. 3-106
Inspection plug
Fig. 3-107
H
M
" male screw)
Downward gradient
Min. 1/100
Min.
3-15/16 in.
Min. 1-31/32 in.
(in. WG)
1.00
Limit line
0.80
0.60
0.40
External Static Pressure
0.20
0
1059 1236 1412
L
Sealing tape
Drain joint
(supplied)
H
M
Limit line
H,M
NOTE
H: At shipment
Fig. 3-108
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Page 55
Ceiling-Mounted Type (T Type)
■
3-30. Required Minimum Space for Installation and Service
(1) Dimensions of suspension bolt pitch and unit
Table 3-6
Dimension
Type
12, 18
ABC
33-21/32 35-53/64 8-17/64
Unit: in.
6-11/16
B
C
Air intake
24
44-19/64 46-29/64 8-17/64
12-19/32
(Suspension bolt pitch)
Ceiling side
A
(Suspension bolt pitch)
26-49/64
1-5/641-5/64
Air outlet
Fig. 3-109
(2) Refrigerant tubing • drain hose position
Left side
9-7/8
Closed with rubber stopper at time of shipment.
Rear (figure shows view from front)
1-1/4
6-47/64
3-5/16
1-17/32
Left drain position Right drain position
2-23/64
1-1/4
2-21/64
2-61/64
Liquid
tubing
Gas tubing
9/64
5-3/4
3-61/64
3-13/16
4-9/64
2-3/64
6-47/64
1-17/32
Right side
8-1/2
(Liquid tubing •
Gas tubing)
6-11/32
9-7/8
Unit: in.
Fig. 3-110
(3) Unit opening position (Refrigerant tubing • drain hose • power inlet port • remote controller wiring inlet port)
Unit: in.
T
Rear outlet port
Inter-unit control wiring
Left-side drain hose
outlet port
*1
Side panel
1 Use a compass saw, jig saw or similar tool and cut along the indented portion of the side panel.
*
(ø1-3/16", knock-out, use rubber grommet)
Outside air intake duct connection port
"
, knock-out)
(ø3-15/16
6-47/64
Power supply outlet
(ø1-3/16", knock-out)
Rear tubing hole
3-5/16
Left-side drain
hose outlet port
3-35/64
10-5/16
4-59/64 2-53/64
13-21/32
3-11/64
4-11/64
Unit: in.
Fig. 3-111
55
Right-side drain
hose outlet port
Side panel
*1
Position of plate
inside side panel
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Page 56
(4) Wall and ceiling side opening position
Figure shows view from front
5-45/64
3-35/64
ø3-15/16 wall side opening
ø3-15/16 wall side opening
(for left-side drain hose)
* If the optional drain up kit is installed, create a ø3-15/16" hole along the dotted line (part marked with * in figure).
3-31. Suspending the Indoor Unit
(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. 3-113).
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
T
correct dimensions between the markings.
(2) Drill holes at the 4 points indicated on the full-scale
diagram.
5-5/16
Ceiling
ø3-15/16 ceiling opening
ø3-15/16 ceiling opening
Fig. 3-112
Figure shows view from top
Wall
Full-scale
installation diagram
Hole-in-anchor
Hole-in-plug
4-59/64
Fig. 3-113
Concrete Insert
3-35/64
*
6-7/64
Ceiling
Wall
(3) Depending on the ceiling type:
a) Insert suspension bolts as shown in Fig. 3-114.
or
b) Use existing ceiling supports or construct a
suitable support as shown in Fig. 3-115.
WARNING
It is important that you use
extreme care in supporting
the indoor unit from the ceiling. Ensure that the ceiling
is strong enough to support
the weight of the unit. Before
hanging the 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 Figs. 3-114
and 3-115. The distance of each exposed bolt must
be of equal length within 1-15/16". (Fig. 3-116)
Pull out the
air-intake grille
pushing claws
of the hinges
Screw
Latch
Slide
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-114
Ceiling tiles
Ceiling suppor t
A
A
Fig. 3-115
Hinge
unit
Ceiling
surface
Fixture
Fig. 3-116
Within
1-15/16"
Air-intake grille
Fig. 3-117
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(5) Before suspending the indoor unit, remove the 2 or 3 screws on the
latch of the air-intake grilles, open the grilles, and remove them by
pushing the claws of the hinges as shown in Fig. 3-117. Then remove
both side panels sliding them along the unit toward the front after
removing the 2 attachment screws. (Fig. 3-118)
(6) Carry out the preparation for suspending the indoor unit. The
suspension method varies depending on whether there is a suspended
ceiling or not. (Figs. 3-119 and 3-120)
(7) Suspend the indoor unit as follows:
a) Mount 1 washer and 2 hexagonal nuts on each suspension bolt as
shown in Fig. 3-121.
b) Lift the indoor unit, and place it on the washers through the notches,
in order to fix it in place. (Fig. 3-122)
c) Tighten the 2 hexagonal nuts on each suspension bolt to suspend
the indoor unit as shown in Fig. 3-123.
NOTE
The ceiling surface is not always level. Please confirm that the indoor unit
is evenly suspended. For the installation to be correct, leave a clearance of
about 3/8" between the ceiling panel and the ceiling surface and fill the gap
with an appropriate insulation or filler material.
(8) If the tubing and wiring are to go towards the rear of the unit, make
holes in the wall. (Fig. 3-124)
(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. 3-125)
Slide toward
front side
Side panel
Unit
Unit
Fig. 3-118
Fixture
Fig. 3-119
Fig. 3-120
Suspension bolt
(field supply)
Ceiling surface
Washer (supplied)
Double nut
(field supply)
Suspension bolt
(field supply)
Washer (field supply)
T
Washer (supplied)
Double nut
(field supply)
Fig. 3-122
NOTE
The hole should be made at a slight downward slant to
the outside.
Indoor
side
Outdoor
side
Washer
(supplied)
PVC pipe (locally purchased)
Suspension bolt
Fig. 3-121
Fig. 3-123
INSIDE
Wall
Approx.
Ceiling
surface
Nut
(field supply)
"
63/64
OUTSIDE
PVC pipe
Slight
angle
Cut at slight angle
Fig. 3-124
Fig. 3-125
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Page 58
3-32. Duct for Fresh Air
There is a duct connection port (knock-out hole) at the rightrear of the top panel of the indoor unit for drawing in fresh
air. If it is necessary to draw in fresh air, remove the cover by
opening the hole and connecting the duct to the indoor unit
through the connection port. (Fig. 3-126)
3-33. Shaping the Tubing
●
The positions of the refrigerant tubing connections are
shown in the figure below. (The tubing can be routed in
3 directions.)
* When routing the tubing out through the top or right sides,
knock out the appropriate parts in the top panel and cut
notches in the side panel as shown in Fig. 3-111.
* When routing the tubing out through the top, the optional
L-shape tubing kit is required.
Rear outlet port
Inter-unit control wiring
"
, knock-out, use rubber grommet)
(ø1-3/16
Outside air intake duct connection port
(ø3-15/16
"
, knock-out)
Power supply outlet
"
, knock-out)
(ø1-3/16
Rear tubing hole
Left-side drain hose outlet port
If the tubing is to be routed out
together, use a box cutter or similar tool to cut out the part of the
rear cover indicated by the marked
area in the figure below, to match
the positions of the tubes. Then
draw out the tubing.
Fig. 3-126
T
Rear cover
Fig. 3-127
3-34. Installing the Drain Piping
●
Prepare standard PVC pipe for the drain and connect it to the
indoor unit drain pipe with the supplied hose clamps to prevent
water leaks.
(1) Drain hose connection
●
The drain hose is connected below the refrigerant tubing.
(2) Installing the drain hose
●
To install the drain hose, first place 1 of the 2 hose bands over the
unit drain port and the other hose band over the hard PVC pipe
(not supplied). Then connect both ends of the supplied drain hose.
●
On the unit drain side, grasp the hose band with pliers and insert
the drain hose all the way to the base.
●
If other commercially available hose bands are used, the drain
hose may become pinched or wrinkled and there is danger of
water leakage. Therefore be sure to use the supplied hose bands.
When sliding the hose bands, be careful to avoid scratching the
drain hose.
●
Do not use adhesive when connecting the supplied drain hose to
the drain port (either on the main unit or the PVC pipe).
●
Wrap the hose with the supplied drain hose insulation and use the
4 twist ties so that the hose is insulated with no gaps.
●
Connect the drain piping so that it slopes downward from the unit
to the outside. (Fig. 3-129)
CAUTION
●
Attach so that the hose band fastener is
on the side of the drain port. (Fig. 3-130)
●
Attach the hose bands so that each is
approximately 13/64 – 63/64 in. from the
end of the supplied drain hose.
Fig. 3-128
Downward gradient
Min. 1/100
Good
Not good
Fig. 3-129
58
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Page 59
●
Never allow traps to occur in the course of the piping.
●
Insulate any piping inside the room to prevent drip-
ping.
●
After the drain piping, pour water into the drain pan to
check that the water drains smoothly.
●
If the drain hose is to be raised, use the optional drain
up kit.
The drain hose can be raised 23-5/8" above the top of
the main unit. (For details, refer to the manual of the
optional part.)
* If the drain hose is
Screwdriver
Drain port
routed through the
left side, refer to Fig.
3-127, and follow the
Rubber stopper
procedure above to
install the hose. Re-attach the rubber stopper that was
earlier removed onto the right side.
The rubber stopper can be inserted easily by using
a screwdriver or similar tool to press the stopper into
the drain port on the main unit. Press the stopper into
the main unit drain port as far as it will go.
Unit drain port
13/64
63/64 63/64
Unit drain pan
CAUTION
Twist tie
(4 ties)
5-33/64
13/64
Hard PVC pipe
(equivalent to
VP-20)
(Field supply)
Drain hose
(supplied)
Hose band
(2 bands, supplied)
Position to
fasten hose
bands
Drain hose
insulation
(supplied)
Fig. 3-131
Check local electrical codes
and regulations before wiring. Also, check any specified
instruction or limitations.
Unit: in.
How to carry out power supply wiring
(1) Wiring connection ports
The power inlet ports are located at the rear and top.
The remote controller wiring inlet ports are located at
the rear and top (for use with the wired remote
controller).
For details, refer to Fig. 3-126. For the method used to
insert the wiring, refer to the figure below. (Fig. 3-132)
CAUTION
When removing the fastening
bracket from the cover of the
electrical component box, use
caution to avoid dropping the
bracket.
(2) How to carry out wiring
●
Open the knock-out hole on the rear or top of the
main unit. Attach the supplied rubber grommet and
pull the power wiring into the main unit.
●
Feed the wiring into the wiring inlet port on the
electrical component box. Connect the wiring to the
terminal plate and fasten in place with the
supplied clamp.
●
Perform electrical and grounding work in
accordance with the package A/C power
specifications, and following local electrical
codes and regulations.
Inter-unit control wiring
T
ø1-9/32 knock-out
Eyelet (supplied)
Power supply outlet
Fig. 3-132
59
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Page 60
Wall-Mounted Type (K Type)
■
3-35. Removing the Rear Panel from the Unit
(1) Remove the set screws used to fasten the rear panel to the
indoor unit during transportation.
(2) Press up on the frame at the 2 locations shown by the arrows
in the figure at right, and remove the rear panel.
NOTE
Tubing can be extended in 4 directions as shown in Fig. 3-134.
Select the direction which will provide the shortest run to the
outdoor unit.
3-36. Selecting and Making a Hole
(1) Remove the rear panel from the indoor unit and place it on
the wall at the location selected. Fix the rear panel and hook
the unit onto it temporarily. Make sure the unit is horizontal
using a carpenter’s level or tape measure to measure down
from the ceiling.
(2) Determine which notch of the rear panel should be used.
(Fig. 3-135)
(3) Before drilling a hole, check that there are no studs or pipes
behind the determined location. The above precautions are
also applicable if tubing goes through the wall in any other
location.
(4) Using a sabre saw, key hole saw or hole-cutting drill attach-
K
ment, make a hole (dia. 3-5/32") in the wall. (Fig. 3-136)
(5) Measure the thickness of the wall from the inside edge to the
outside edge and cut the PVC pipe at a slight angle
15/64" shorter than the thickness of the wall. (Fig. 3-137)
(6) Place the plastic cover over the end of the pipe (for indoor
side only) and insert in the wall. (Fig. 3-138)
Screws used during
transportation
Left tubing
Center of left rear
tubing hole
Tubing hole diameter ø3-5/32
Press
Fig. 3-133
Fig. 3-134
Fig. 3-135
Indoor
side
Remove the rear panel
Left-rear tubing
Right-rear
tubing
(recommended)
Right tubing
Center of right rear
tubing hole
Outdoor
side
NOTE
The hole should be made at a slight downward gradient to the
outside.
CAUTION
Avoid areas where electrical wiring or
conduits are located.
3-37. Installing the Rear Panel onto the Wall
Confirm that the wall is strong enough to support the unit.
See either Item a) or b) below depending on the wall type.
a) If the Wall is Wooden
(1) Attach the rear panel to the wall with the 10 screws provided. (Fig. 3-139)
If you are not able to line up the holes in
the rear panel with the beam locations
marked on the wall, use Rawl plugs or
toggle bolts to go through the holes on
the panel or drill 3/16" dia. holes in the
Plastic
cover
INSIDE
Wall
OUTSIDE
PVC pipe
Slight
angle
panel over the stud locations and then
mount the rear panel.
Fig. 3-138
60
Fig. 3-136
PVC pipe (locally purchased)
Cut at slight angle
Fig. 3-137
Fig. 3-139
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Page 61
(2) Check with a tape measure or carpenter’s level. This is
important so that the unit is correctly installed. (Fig. 3-140)
(3) Make sure the panel 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" dia. holes in the wall. Insert Rawl plugs for
appropriate mounting screws. (Fig. 3-141)
Fig. 3-140
3-38. Removing the Grille to Install the Indoor Unit
In principle, with this model wiring can be completed without
removing the grille.
However, if it is necessary to change the settings on the PCB,
follow the procedure below.
Removing the grille
(1) Lift up on both sides of the air-intake grille to open it.
(Fig. 3-142)
(2) Remove the filter. (Fig. 3-142)
(3) Adjust the flap so that it is horizontal. (Fig. 3-143)
(4) Open the installation screw covers below the grille
(3 locations). (Fig. 3-143)
(5) Remove the screws. (Fig. 3-143)
(6) Remove the grille. (Fig. 3-144)
Attaching the grille
(1) Close the flap.
(2) Keep the grille installation tabs aligned with the top portion of
the grille, and reinstall the lower portion of the grille.
Fit the installation tabs into the grooves and press the lower
portion of the grille back into its original position to install it.
(3) Press on the installation tabs to completely close the grille.
Check that the grille and frame are fitted tightly together.
3/16"
dia. hole
Rawl plug
Fig. 3-141
Intake grille
Filter
Flap
Open the grille
Fig. 3-142
K
Installation screw cover
Fig. 3-143
3-39. Preparing the Tubing
(1) Arrangement of tubing by directions
a) Right or left tubing
The corner of the right or left frame should be cut with a
hack saw or similar. (Fig. 3-145)
b) Right-rear or left-rear tubing
In this case, the corners of the frame do not need to be
cut.
(2) Be sure to insulate the part of the drain hose that is run
indoors, and the refrigerant tubing.
If these are not insulated, condensation may result in dripping
and damage to walls and furniture.
The flare nuts on the 24-type (only) are large;
therefore, use the supplied insulation material.
61
Remove the grille
Fig. 3-144
Right tubing
outlet
When left and right side tubing
Fig. 3-145
Frame
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Page 62
(3) To mount the indoor unit on the rear panel.
▲
1. When installing the indoor unit, position the indoor unit onto the
installation tabs on the upper part of the rear panel. (Fig. 3-146)
2. Press on the air outlet to hold it in place, and press the lower
part of the indoor unit until a “click” sound is heard and the
indoor unit is securely fastened to the installation tabs on the
lower side of the rear panel. (Fig. 3-147)
Raising the clamp to lift up the indoor unit will facilitate this work.
(Fig. 3-148)
To remove the indoor unit, press up on the 2 locations
(
marks) on the lower part of the unit frame to disconnect the
▲
installation tabs. Refer to Section 3-35. “Removing the Rear Panel
from the Unit” (Fig. 3-133).
Then lift up the indoor unit to remove it.
3-40. Shaping the Tubing
Right-rear tubing
Installation tabs
Installation tabs
Fig. 3-146
Fig. 3-148
Press
Fig. 3-147
Clamp
(1) Shape the refrigerant tubing so that it can easily go into the hole.
(Fig. 3-149)
(2) After performing a leak test, wrap both the refrigerant tubing and
drain hose together with insulating tape.
The drain hose should be positioned below the refrigerant tubes,
and should be given sufficient space so that no strong tension is
applied to it.
(3) Push the wiring, refrigerant tubing and drain hose through the hole
K
in the wall. Adjust the indoor unit so it is securely seated on the
rear panel.
Left or left-rear tubing
(1) Pass the tubing and drain hose into the rear of the indoor unit.
Provide sufficient length for the connections to be made.
Next, bend the tubing with a pipe bender, and connect them.
(Fig. 3-150)
(2) After performing a leak test, wrap the refrigerant tubing and drain
hose together with insulating tape, as shown in the figure at right.
(Fig. 3-151)
Then fit the tubing into the tubing storage space in the rear of the
indoor unit and clamp in place.
(3) Adjust the indoor unit so that it is securely installed onto the rear
panel.
3-41. Installing the Drain Hose
a) The drain hose should be slanted downward to the
outside. (Fig. 3-152)
b) Never form a trap in the course of the hose.
c) If the drain hose will run in the room, insulate the hose* so that
chilled condensation will not damage furniture or floors.
* Foamed polyethylene or its equivalent is recommended.
Rear panel tab
Plastic cover
Insulating tape
Drain hose
Fig. 3-149
Fig. 3-150
Fig. 3-151
Indoor unit
Insulating
tape
Refrigerant
tubing
Indoor and
outdoor unit
connection wiring
Insulation
Refrigerant tubing
Rear panel
Inter-unit wiring
Slant
WARNING
Do not supply power to the unit or operate
it until all tubing and wiring to the outdoor
unit are completed.
62
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Fig. 3-152
Refrigerant
tubing
Page 63
3-42. When Using Wireless Remote Controller Instead of Wired Remote Controller
When the wireless remote controller is to be used, slide the switch on the indoor unit control PCB.
• If this setting is not made, an alarm will occur. (The operation lamp on the display blinks.)
• This setting is not necessary if both the wired remote controller and wireless remote controller are used.
• The location of the switch varies depending on the type of PCB used. Check the model name before making the
setting.
KHX0752 / 0952 / 1252 / 1852
CR-KR74GXH56A-0
KHX2452
CR-KR254GXH56A-0
Setting at time of
factory shipment
Setting at time of
factory shipment
Slide No. 3 on SW101
from ON OFF.
K
Slide No. 3 on SW101
from ON OFF.
63
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Page 64
4. HOW TO INSTALL THE OUTDOOR UNIT
4-1. Transporting
When transporting the unit, have it delivered as close to the installation site as
possible without unpacking. Use a hook for suspending the unit. (Fig. 4-1)
CAUTION
When hoisting the outdoor unit, pass ropes or straps under the bottom plate
●
as shown in the figure at right. When hoisting, the angle between the rope
and top panel must be 70° or greater so that the rope does not come into
contact with the fan guard.
(Use 2 lengths of rope 25 ft. long or longer.)
When passing the ropes through the square holes of the bottom plate:
●
Place the rope in the outer edge of the square holes.
Use protective panels or padding at all locations where the rope contacts the
●
outer casing or other parts to prevent scratching. In particular, use protective
material (such as cloth or cardboard) to prevent the edges of the top panel
from being scratched.
Be careful of the fan.
●
There is danger of injury if the fan starts to turn during inspection. Be sure to
turn OFF the remote power switch before beginning inspection.
4-2. Installing the Outdoor Unit
(1) Use anchor bolts (M12 or 15/32") or similar to securely anchor the unit in
place. (Fig. 4-2)
(2) Be sure the rubber vibration insulator and platform extend to the inside of the
legs. In addition, the washers used to anchor the unit from the top must be
larger than the installation anchor holes. (Figs. 4-2 and 4-3)
(Positions where anchor bolts are fastened)
Installation anchor hole (4 – 19/32 s 25/32 oval holes)
Fig. 4-1
Plate leg
Anchor bolts
Washer
25/32
3-15/32
(3-15/16)
(3-15/16)
Vibration insulator
1-31/32
Base
Unit: in.
The vibration insulator, base, or platform must
be large enough to bear the full surface of the
base plate legs.
Fig. 4-2
36-7/32 (Installation hole pitch)
37-13/32 (Maximum dimensions)
35-3/64 (Ceiling panel dimensions)
31-7/64 (Installation hole pitch)
35-3/64 (Ceiling panel dimensions)
35-3/64 (Ceiling panel dimensions) 35-3/64 (Ceiling panel dimensions)
31-7/64 (Installation hole pitch) 31-7/64 (Installation hole pitch)
74-1/64 (Ceiling panel dimensions)
35-3/64 (Ceiling panel dimensions)
70-5/64 (Installation hole pitch)
Top view
Fig. 4-4
36-7/32 (Installation hole pitch)
37-13/32 (Maximum dimensions)
Unit: in.
64
Surface where
installation anchor
brackets are
installed
1-31/32
4 – 19/32 25/32 hole
(Detailed view of legs)
19/32
Unit: in.
1-33/64
Fig. 4-3
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Page 65
4-3. Remove the Brackets Used for Transport
●
After installing the unit, remove the
2 transport brackets from the front
and rear (4 brackets total).
(Fig. 4-5)
Remove the 2 screws
(8 screws total)
Remove the 2 transport brackets from
the front and rear (4 brackets total)
Fig. 4-5
4-4. Routing the Tubing
●
The tubing can be routed out either from the front or from the bottom. (Fig. 4-6)
●
The connecting valve is contained inside the unit. Therefore, remove the front panel. (Fig. 4-6)
(1) If the tubing is routed out from the front, use cutting pliers or a similar tool to cut out the tubing outlet slit (part
indicated by
) from the tubing cover. (Figs. 4-6 and 4-7)
Front
Bottom
Tubing cover
Remove 2 screws
Use cutting pliers or similar
tool to cut cover out
(2) If the tubing is routed out from the bottom, remove
the slit part ( ).
●
Use a drill bit approximately 13/64" dia. to create
holes at the 4 slit hole indentations (openings).
●
Punch out the slit part ( ).
●
Be careful not to damage the base plate.
Remove 11 panel
screws from front
panel
Fig. 4-6
Indentation
(4 locations)
Slit hole
Fig. 4-7
65
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Page 66
4-5. Prepare the Tubing
●
Material: Use C1220 phosphorous deoxidized copper as described in JIS H3300, “Copper and Copper Alloy
Seamless Pipes and Tubes.”
(For tubes that are ø1" (ø25.4 mm) or larger, use 1/2H material or H material. For all others use O material.)
●
Tubing size
Use the tubing size indicated in the table below.
●
When cutting the tubing, use a tube cutter, and be sure to remove any burrs.
(The same applies to distribution tubing (optional).)
●
When bending the tubes, bend each tube using a radius that is at least 4 times the outer diameter of the tube.
When bending, use sufficient care to avoid crushing or damaging the tube
●
For flaring, use a flare tool, and be sure that flaring is performed correctly.
CAUTION
means of caps or taping to prevent dust, moisture, or other foreign substances
from entering the tubes.
Refrigerant tubing (Existing tubing can be used.)
Use sufficient caution during preparation of the tubing. Seal the tube ends by
Outer dia. Thickness Outer dia. Thickness
ø1/4" (ø6.35) t1/32" (t0.8) ø3/4" (ø19.05) over t5/128" (t1.0)
ø3/8" (ø9.52) t1/32" (t0.8) ø7/8" (ø22.22) t5/128" (t1.0)
ø1/2" (ø12.7) t1/32" (t0.8) ø1-1/8" (ø28.58) t5/128" (t1.0)
ø5/8" (ø15.88) t5/128" (t1.0) ø1-3/8" (ø34.93) t3/64" (t1.1)
Tubing size (mm)
4-6. Connect the Tubing
●
Use the supplied connector tubing. (See figure below.)
09053 type (10 horsepower)
2
34
1
Refrigerant
tubing
1
Suction tube
2
Discharge tube
3
Liquid tube
4
Balance tube
Connection method
Brazed connection
Brazed connection
Brazed connection
Flared connection
Use supplied
connector tube?
Yes (ø3/4" m ø7/8")
Yes (ø5/8" m ø3/4")
No
No
014053 type (16 horsepower)
1
2
34
Refrigerant
tubing
1
Suction tube
2
Discharge tube
3
Liquid tube
4
Balance tube
Brazed connection
Brazed connection
Brazed connection
Flared connection
Refrigerant tube port
●
Use caulking, putty, or a similar material to fill any
gaps at the refrigerant tube port ( ) in order to
prevent rainwater, dust or foreign substances from
entering the unit.
* Perform this work even if the tubing is routed out
in a downward direction.
Connection method
Tubing routed out forward
66
Use supplied
connector tube?
Yes (ø1" m ø1"–1/8")
Yes (ø3/4" m ø7/8")
No
No
Tubing
cover
Tubing routed out downward
Base plate
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Page 67
●
Tighten each cap as specified below.
Tightening torque for each cap
Service port cap
(width 19/32")
Valve cap
(width 55/64")
Flare nut
(valve dia. ø3/8")
60 – 100 lbs · in (70 – 120 kgf · cm)
170 – 220 lbs · in (200 – 250 kgf · cm)
300 – 360 lbs · in (340 – 420 kgf · cm)
Valve cap
Flare nut
Service port cap
Do not apply a monkey wrench
to the hexagonal part.
Do not use two monkey wrenches when
removing or installing the balance tube
flare nut. In particular, do not apply a
monkey wrench to the hexagonal part at
the top of the valve.
(If force is applied to this part,
gas leakage will occur.)
Precautions for brazing
●
Use two monkey wrenches, as shown in the figure,
when removing the liquid tube valve flare nut.
1. Do not apply a wrench to the valve cap when removing or
installing the flare nuts. Doing so may damage the valve.
2. If the valve cap is left off for a long period of time, refrigerant
leakage will occur. Therefore, do not leave the valve cap off.
3. Applying refrigerant oil to the flare surface can be effective in
preventing gas leakage, however be sure to use a refrigerant
oil which is suitable for the refrigerant that is used in the system.
(This unit utilizes R410A refrigerant, and the refrigerant oil is
ether oil (synthetic oil). However, hub oil (synthetic oil) can also
be used.)
Be sure to replace the air inside the tube with nitrogen to prevent oxide film from forming during the brazing process.
Be sure to use a damp cloth or other means to cool the valve unit during brazing.
Work method
Field-supply tube
Brazing locations
Remote valve
Taping
Pressure-reducing valve (regulator)
Nitrogen
CAUTION
1. Be sure to use nitrogen. (Oxygen, CO2, and CFC must not be used.)
2. Use a pressure-reducing valve on the nitrogen tank.
3. Do not use agents intended to prevent the formation of oxide film. They will adversely affect the refrigeration oil, and may cause equipment failure.
4. The balance tube is not used if only 1 outdoor unit is installed.
Use the unit in the same conditions as when it was shipped from the factory.
67
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Page 68
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, please refer to 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 manufacture, because special purpose
tools are required.
5-2. Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit
Time delay fuse or
circuit capacity
CHDZ09053
CHDZR09053
CHDZ14053
CHDZR14053
Indoor unit
Type
K
A, X, XM, T, U
D (364, 484)
Control wiring
(A) Inter-unit (between outdoor and
indoor units) control wiring
AWG #18 (0.75 mm
Use shielded wiring* Use shielded wiring Use shielded wiring
Max. 3,280 ft. Max. 1,640 ft.
50 A
70 A
Time delay fuse or
circuit capacity
10 – 16A
10 – 16A
10 – 16A
(B) Remote control wiring (C) Control wiring for group control
2
)
AWG #18 (0.75 mm
Max. 1,640 ft. (Total)
2
)AWG #18 (0.75 mm2)
NOTE
* With ring-type wire terminal.
68
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(D) Inter-outdoor unit control wiring
2
AWG #18 (0.75 mm
Use shielded wiring
Max. 1,640 ft.
)
Page 69
5-3. Wiring System Diagram
For K, A, X, T, U and D Types
●
Power supply
208 / 230V, 1ø, ~60Hz
Remote
controller
WHT
BLK
Power supply
208 / 230V, 1ø, ~60Hz
Remote
controller
WHT
BLK
Group control:
Power supply
208 / 230V, 1ø, ~60Hz
Power supply
208 / 230V, 1ø, ~60Hz
Remote
controller
WHT
BLK
L1
L2
Ground
1
1
2
2
L1
L2
Ground
1
1
2
2
L1
L2
Ground
L1
L2
Ground
1
1
2
2
Indoor
*
B
unit (No. 1)
L1
L2
U1
U2
R1
R2
Outdoor unit
A
1
U1
2
U2
3
4
3
5
4
INV unit
*
L1
L2
L3
Ground
Power supply
208 / 230V, 3ø, ~60Hz
A
Indoor
C
unit (No. 2)
L1
L2
U1
U2
R1
R2
A
Indoor
unit (No. 3)
L1
L2
U1
U2
R1
R2
D
Inter-outdoor-unit control wiring
Outdoor unit
INV unit
*
NOTE:
1
2
3
3
4
4
5
*
L1
L2
L3
Ground
Disconnect Switch may be needed by the
National/Local code.
Power supply
208 / 230V, 3ø, ~60Hz
* Disconnect switch
(
Field Supply)
*
B
*
A
ALWAYS COMPLY WITH NATIONAL AND
Indoor
*
B
unit (No. n)
L1
L2
U1
U2
R1
R2
LOCAL CODE REQUIREMENTS.
NOTE
(1) Refer to Section 5-2. “Recommended Wire Length and
Wire Diameter for Power Supply System” for the
explanation of “A,” “B,” “C,” and “D,” in the above
diagram.
(2) The basic connection diagram of the indoor unit shows
the 7P terminal board, so the terminal boards in your
equipment may differ from the diagram.
(3) Refrigerant Circuit (R.C.) address should be set before
turning the power on.
(4) Regarding the R.C. address setting, refer to page 87.
Address setting can be executed by remote controller
automatically. Refer to page 87 – 91.
69
1(L1) 2(L2)
Power
supply
7P terminal board
U2
U1
Inter-unit
control wiring
X, A, U, D, T Types
5P terminal board
12 3 4 5
1(L1)2(L2)
Power
supply
U1 U2
Inter-unit
control wiring
K Type
R1
R2
Remote
controller
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Page 70
For XM Type
●
Power supply
208/230V, 1ø, ~60Hz
Remote
controller
WHT
1
BLK
2
Power supply
208/230V, 1ø, ~60Hz
Remote
controller
WHT
BLK
212
Group control:
Power supply
208/230V, 1ø, ~60Hz
1
2
1
L
N
Ground
L
N
Ground
L
N
Ground
Indoor unit
C
(No. 1)
1
2
3
U1
U2
1
2
Indoor unit
(No. 2)
1
2
3
U1
U2
1
2
Indoor unit
(No. 3)
1
2
3
U1
U2
1
2
Outdoor unit
INV unit
A
1
U1
2
U2
3
4
3
5
4
*
L1
L2
L3
N
Ground
Power supply
208/230V, 3ø, ~60Hz
A
Inter-outdoor-unit control wiring
D
Outdoor unit
INV unit
1
2
3
3
4
4
A
5
*
L1
L2
L3
N
Ground
Power supply
208/230V, 3ø, ~60Hz
* Disconnect switch
(
Field Supply)
*
NOTE:
Disconnect Switch may be needed by the
National/Local code.
*
B
*
B
*
A
Indoor unit
(No. n)
1
2
3
U1
U2
1
2
Power supply
208/230V, 1ø, ~60Hz
Remote
controller
WHT
BLK
212
1
L
N
Ground
*
B
NOTE
(1) Refer to Section 5-2. “Recommended Wire Length
and Wire Diameter for Power Supply System” for
the explanation of “A,” “B,” “C,” and “D,” in the above
diagram.
(2) The basic connection diagram of the indoor unit
shows the 6P (XM type) terminal board, so the terminal boards in your equipment may differ from the
diagram.
(3) Refrigerant Circuit (R.C.) address should be set
before turning the power on.
(4) Regarding R.C. address setting, refer to page 87.
Auto address setting can be executed by remote
controller automatically. Refer to page 87 – 91.
ALWAYS COMPLY WITH NATIONAL AND
LOCAL CODE REQUIREMENTS.
XM Type
6P terminal board
L N U1 U2 R1 R2
POWER
SUPPLY
UNIT CONTROL
LINE
REMOTE
CONTROL
LINE
70
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Page 71
CAUTION
(1) When linking outdoor units in a network (S-net link system), disconnect the terminal extended from the short plug
(CN003, 2P Black, location: right bottom on the outdoor main control PCB) from all outdoor units except any one of
the outdoor units. (When shipping: In shorted condition.)
Otherwise the communication of S-net link system is not performed. For a system without link (no connection wir-
ing between outdoor units), do not remove the short plug.
(2) Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 5-1)
Outdoor unit Outdoor unit Outdoor unit
Prohibited
Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit
Fig. 5-1
(3) Do not install inter-unit control wiring such as star branch wir-
ing. Star branch wiring causes mis-address setting. (Fig. 5-2)
NO
Outdoor unit Indoor unit Indoor unit Indoor unit
NO
(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.
(Branches less than 3.3 ft. are not included in the total branch number.) (Fig. 5-3)
Indoor unit Indoor unit Indoor unit
Branch point
Fig. 5-2
Prohibited
Outdoor unit
Indoor unit
Branch
point
16 or fewer
Outdoor unit Outdoor unit Outdoor unit
Indoor unit Indoor unit Indoor unit Indoor unit
more than 3.3 ft.
Indoor unit
more than 3.3 ft.
Indoor unit
less than 3.3 ft.
Indoor unit
Indoor unit Indoor unit Indoor unit
Fig. 5-3
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Loose wiring may cause the
WARNING
terminal to overheat or result
in unit malfunction. A fire
hazard may also exist.
Therefore, ensure that all wir-
ing is tightly connected.
When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the
terminal” and fasten the wire securely with the fixing
screw of the terminal plate.
How to connect wiring to the terminal
■ For stranded wiring
(1) Cut the wire end with cutting pliers, then strip the
insulation to expose the stranded wiring approx.
3/8 in. and tightly twist the wire ends. (Fig. 5-4)
(2) Using a Phillips head screwdriver, remove the termi-
nal 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.
(4) Place the ring pressure terminal, and replace and
tighten the removed terminal screw using a screwdriver. (Fig. 5-5)
Special
washer
Wire
Stranded wire
Strip 3/8 in.
Fig. 5-4
Screw
Ring pressure
terminal
Terminal plate
Fig. 5-5
Ring
pressure
terminal
Screw and
Special washer
Ring
pressure
terminal
Wire
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5-4. Important Note When Wiring for Common Type
Connect the wires referring to the diagram. Note that
the remote control wires and the power supply wires
are not supplied. The remote control wires shall be
segregated from the power supply wires as follows:
Install the optional remote control wires (field supplied)
1.
and the manufacturer supplied 3-way wiring harness to
the electrical connection box as shown in the diagram.
One end of the optional remote control wiring is
connected to the R1/R2 terminals.
Connect the power supply wires to "L1, L2" of the
2.
terminal block. Be sure to connect the grounding
conductor of the incoming power supply to the earth
(ground) screw.
Securely affix the power supply wires and remote
3.
control wires by the clamping strap or clamping clip
not to cross each other and not to leave the wirings
loose. When loosening the clamping clip, twist the
strap and it will come undone.
Clamping clip
Twist
X Type
Earth screw
Power wiring
(field supplied)
Clamping
clip
3-way connection
wiring with harness
(supplied)
NOTE
Securely affix the 3-way wiring harness with the
remote control wire (X type).
A Type U Type
Optional remote control
wire (field supplied)
Conduit
Earth screw
Power wiring
(field supplied)
Conduit
Conduit
Optional remote control
wire (field supplied)
Clamping
clip
Clamping
clip
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Earth screw
Power wiring
(field supplied)
Optional remote control
wire (field supplied)
73
3-way connection wiring with
harness (supplied)
Page 74
Important Note When Wiring for Common Type (Continued)
D Type T Type
Optional remote control
wire (field supplied)
Clamping
clip
Conduit
Clamping
clip
Optional remote control wire
(field supplied)
Power wiring
Earth screw
(field supplied)
K Type
Model : KHX0752/0952/1252/1852
Clamping
strap
Power wiring
(field supplied)
3-way connection wiring
with harness (supplied)
Earth screw
Model :
KHX2452
Clamping
strap
Power wiring
(field supplied)
Power wiring
(field supplied)
3-way connection wiring
with harness (supplied)
Conduit
Optional remote
Conduit
control wire
Conduit
(field supplied)
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Optional remote
control wire
(field supplied)
Page 75
5-5. Important Note When Wiring for XM Type
Connect the wires referring to the diagram. Note that
the remote control wires and the power supply wires
are not supplied. The remote control wires shall be
segregated from the power supply wires as follows:
Install the optional remote control wires (field supplied)
1.
and the manufacturer supplied 3-way wiring harness to
the electrical connection box as shown in the diagram.
One end of the optional remote control wiring is
connected to the R1/R2 terminals. Then place and fix
the two clasps so that the clasps shall cover both the
remote control wires and the 3-way wiring harness as
shown in the magnified drawing.
Connect the grounding conductor of the incoming
2.
power supply to the earth (ground) screw before
connecting the power supply conductors to "L1, L2"
of the terminal block.
Securely affix the two power supply conductors
3.
(L1, L2) in the wiring channel by the clamping strap
as shown.
NOTE
XM Type
3-way connection wiring with
harness (supplied)
Optional remote control wire
(field supplied)
Clasp
Power wiring
(field supplied)
Conduit
Earth screw
Clamping strap
Take care not to damage the remote wiring by the
clasp. Do not leave the remote wiring loose.
Entirely cover the remote
wiring and the 3-way wiring
harness with the clasp.
Remote control wiring
75
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6. HOW TO PROCESS TUBING
The liquid tubing side is connected by a flare nut, and the gas
tubing side is connected by brazing.
6-1. Connecting the Refrigerant Tubing
Use of the Flaring Method
Many of conventional split system air conditioners employ the
flaring method to connect refrigerant tubes which run between
indoor and outdoor units. In this method, the copper tubes are
flared at each end and connected with flare nuts.
Before
Deburring
After
Flaring Procedure with a Flare Tool
(1) Cut the copper tube to the required length with a tube
cutter. It is recommended to cut approx. 1 – 2 ft. longer
than the tubing length you estimate.
(2) Remove burrs at the end of the copper tube with a tube
reamer or file. This process is important and should be
done carefully to make a good flare. (Fig. 6-1)
NOTE
When reaming, hold the tube end downward and be sure that
no copper scraps fall into the tube. (Fig. 6-2)
(3) Remove the flare nut from the unit and be sure to mount
it on the copper tube.
(4) Make a flare at the end of copper tube with a flare tool.*
(Fig. 6-3)
®
(*Use “RIGID
” or equivalent.)
NOTE
A good flare should have the following characteristics:
inside surface is glossy and smooth
●
edge is smooth
●
tapered sides are of uniform length
●
Fig. 6-1
Copper
tubing
Reamer
Fig. 6-2
Flare nut
Copper
tubing
Flare tool
Fig. 6-3
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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 match-
ing surfaces of the flare and union before connecting
them together. This is effective for reducing gas leaks.
(Fig. 6-4)
(3) For proper connection, align the union tube and
flare tube straight with each other, then screw in the
flare nut lightly at first to obtain a smooth match.
(Fig. 6-5)
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.
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 for-
●
mation of oxide film. These agents adversely
affect the refrigerant and refrigerant oil, and may
cause damage or malfunctions.
6-2. 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
●
connections, or when tightening them after connecting the tubing, be sure to use 2 monkey wrenches or
spanners as shown. (Fig. 6-6)
If the flare nuts are over-tightened, the flare may be
damaged, which could result refrigerant leakage and
cause in injury or asphyxiation to room occupants.
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.
Apply refrigerant
lubricant
Fig. 6-4
Fig. 6-5
Fig. 6-6
Flare nut
Outdoor unit
inch
·
cm)
·
inch
·
cm)
·
inch
·
inch
·
cm)
·
inch
·
cm)
·
Spanner
Tube thickness
1/32"
(0.8 mm)
1/32"
(0.8 mm)
1/32"
(0.8 mm)
5/128"
(1.0 mm)
over 5/128"
(1.0 mm)
Indoor unit
Tube diameter
ø1/4" (ø6.35 mm)
ø3/8" (ø9.52 mm)
ø1/2" (ø12.7 mm)
ø5/8" (ø15.88 mm)
ø3/4" (ø19.05 mm)
Union
Torque wrench
Tightening torque,
approximate
120 – 160 lbs
(140 – 180 kgf
300 – 360 lbs
(340 – 420 kgf
430 – 530 lbs
(490 – 610 kgf·cm)
590 – 710 lbs
(680 – 820 kgf
870 – 1040 lbs
(1000 – 1200 kgf
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 monkey wrench with a nominal handle length of
7-7/8 in.
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6-3. Insulating the Refrigerant Tubing
Tubing Insulation
Thermal insulation must be applied to all unit tubing,
●
including the distribution joint (purchased separately).
(Fig. 6-7)
* 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 25/64 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 use
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. 6-8)
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.
CAUTION
After a tube has been insulated,
never try to bend it into a narrow
curve because it can cause the
tube to break or crack.
Two tubes arranged together
Liquid tubing
Three tubes arranged together
Liquid tubing
Insulation
Four tubes arranged together
Discharge tubing
Balance tubing
Insulation
Sealer (supplied)
Unit side
insulator
Flare nut
Drain insulator
and clamp.
Large
(supplied)
Insulation
Cosmetic
(finishing) tape
Cosmetic
(finishing) tape
Fig. 6-7
Insulation tape (white)
(supplied)
Vinyl clamps (supplied)
Fig. 6-8
Refrigerant tubing and insulator
(not supplied)
Drain pipe and insulator
(not supplied)
Gas tubing
Gas tubing
Balance tubing
Suction tubing
Liquid tubing
Flare insulator (supplied)
Tube insulator
(not supplied)
Heat resistant
248°F or above
Packing
clamp.
Small
hose band
(supplied)
Flare
insulator
Seal
The procedure used for
installing the insulator for
both gas and liquid
tubes are the same.
Insulation
tape
Vinyl
clamp
Fig. 6-9
Never grasp the drain or refrigerant connecting outlets
when moving the unit.
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Page 79
6-4. Taping the Tubes
(1) At this time, the refrigerant tubes (and electrical wir-
ing if local codes permit) should be taped together
with armoring tape in 1 bundle. To prevent the condensation from overflowing the drain pan, keep the
drain hose separate from the refrigerant tubing.
(2) Wrap the armoring tape from the bottom of the out-
door 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 ft. (Fig. 6-10)
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.
6-5. Finishing the Installation
After finishing insulating and taping over the tubing, use
sealing putty to seal off the hole in the wall to prevent
rain and draft from entering. (Fig. 6-11)
Apply putty here
Insulated tubes
Fig. 6-10
Clamp
Drain hose
Tubing
Fig. 6-11
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7. AIR PURGING
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)
■
Preparation
Check that each tube between the indoor and outdoor
units have been properly connected and all wiring for
the test run has been completed. Remove the valve
caps from all service ports on the outdoor unit. (Fig.
7-2) Note that all service valves on the outdoor unit are
kept closed at this stage.
The balance tube leak test is not necessary if only 1
outdoor unit is installed.
Leak test
(1) Attach a manifold valve (with pressure gauges) and
dry nitrogen gas cylinder to all service ports with
charge hoses.
The balance tube leak test is not necessary if only 1
outdoor unit is installed.
Use a manifold valve for air
CAUTION
(2) Pressurize the system to no more than 469 psig
(33 kgf/cm
2
G) with dry nitrogen gas and close the cylinder valve when the gauge reading reaches 469 psig
(33 kgf/cm2G). Then, test for leaks with liquid soap.
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.
Manifold gauge
Fig. 7-1a
Flare nut
Pressure
gauge
Suction
tube
Discharge
tube
Valve cap
Fig. 7-2
Manifold valve
Lo Hi
Cylinder
valve
Open
Open
Vacuum pump
Outlet
Inlet
Fig. 7-1b
Service port cap
Charge hose
Nitrogen gas cylinder
(In vertical standing
position)
Close
Outdoor unit
Close
Open
Close
CAUTION
To avoid nitrogen entering
the refrigerant system in a
liquid state, the top of the
Liquid
tube
cylinder must be higher than
the bottom when you pressurize the system. Usually,
the cylinder is used in a ver-
Balance
tube
Open
Close
tical standing position.
Fig. 7-3
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(3) Do a leak test of all joints of the tubing (both indoor
and outdoor) and all service valves. Bubbles indicate
a leak. Wipe off the soap with a clean cloth after a
leak test.
(4) After the system is found to be free of leaks, relieve
the nitrogen pressure by loosening the charge hose
connector at the nitrogen cylinder. When the system
pressure is reduced to normal, disconnect the hose
from the cylinder.
Evacuation
(1) Attach the charge hose end described in the preced-
ing steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm that the “Lo” knob of the
manifold valve is open. Then, run the vacuum pump.
The operation time for evacuation varies with the
tubing length and capacity of the pump. The following table shows the amount of time for evacuation:
Required time for evacuation
when 30 gal/h vacuum pump is used
If tubing length is If tubing length is
less than 49 ft. longer than 49 ft.
45 min. or more 90 min. or more
Evacuation is not necessary for the balance tube if
only 1 outdoor unit is installed.
Pressure
gauge
Suction
tube
Discharge
tube
Manifold valve
Lo Hi
Open
Open
Open
Vacuum pump
Close
Outdoor unit
Close
Liquid
tube
Balance
tube
Close
Open
Close
Fig. 7-4
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NOTE
The required time in the above table is calculated based
on the assumption that the ideal (or target) vacuum
condition is less than –14.7 psig (–755 mm Hg, 5 Torr).
(2) When the desired vacuum is reached, close the “Lo”
knob of the manifold valve and turn off the vacuum
pump. Please confirm that the gauge pressure is
under –14.7 psig (–755 mm Hg, 5 Torr) after 4 to 5
minutes of vacuum pump operation.
Charging additional refrigerant
Pressure
gauge
Manifold valve
Lo Hi
Valve
Liquid
CAUTION
●
Charging additional refrigerant (calculated from the
Use a cylinder designed for
use with R410A.
liquid tube length as shown in Section 1-8 “Additional
Refrigerant Charge”) using the liquid tube service
valve. (Fig. 7-5)
●
Use a balance or scale to measure the refrigerant
accurately.
●
If the additional refrigerant charge amount cannot be
charged at once, charge the remaining refrigerant in
liquid form by using the suction tube service valve
with the system in Cooling mode at the time of test
run. (Fig. 7-6)
●
Close the valve on the cylinder containing R410A.
Finishing the job
(1) With a flathead screwdriver, turn the liquid tube ser-
vice valve counter-clockwise to fully open the valve.
(2) Turn the all service valve counter-clockwise to fully
open the valve.
(3) Close all stop valves and loosen the “LO” knob of
the manifold valve.
(4) Loosen the charge hose connected to all service
port, then remove the hose.
(5) Replace all valve caps at all service ports and fasten
them securely.
This completes air purging with a vacuum pump. The air
conditioner is now ready for a test run.
Suction
tube
Discharge
tube
Liquid
tube
Balance
tube
Suction
tube
Discharge
tube
Close
Close
Open
Close
Fig. 7-5
Open
Close
R410A
Close
Outdoor unit
Close
Close
Close
Open
Outdoor unit
Open
Close
Liquid
tube
Close
Balance
tube
Open
Open
Fig. 7-6
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8. TEST RUN
8-1. Preparing for Test Run
●
Before attempting to start the air conditioner,
check the following.
(1) The control wiring is correctly connected and all
electrical connections are tight.
(2) The transportation pads for the indoor fan have
been removed. If not, remove them now.
(3) The power has been connected to the unit for at
least 5 hours before starting the compressor. The
bottom of the compressor should be warm to the
touch and the crankcase heater around the feet of
the compressor should be hot to the touch.
(Fig. 8-1)
(4) If only 1 outdoor unit is installed, close the service
valve on the balance tubes, and open the service
valve on the other 3 tubes (suction, discharge, and
liquid tubes). (Fig. 8-2)
If 2 or 3 outdoor units are installed, open the service
valves on all 4 tubes (suction, discharge, liquid, and
balance tubes). (Fig. 8-2)
(5) Request that the customer be present for the trial
run.
Explain the contents of the instruction manual, then
have the customer actually operate the system.
(6) Be sure to give the instruction manual and warranty
certificate to the customer.
(7) When replacing the control PCB, be sure to make all
the same settings on the new PCB as were in use
before replacement.
The existing EEP ROM is not changed, and is connected to the new control PCB.
Power mains switch
Balance tube
Liquid tube
Discharge tube
ON
(Power must be turned ON
at least 5 hours before
attempting test run)
Fig. 8-1
Suction tube
Fig. 8-2
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8-2. Test Run Procedure
<Outdoor unit control PCB>
Unit No. setting switch
(S007)
<Outdoor unit control PCB>
Unit No. setting switch
(S006)
<Outdoor unit control PCB>
Unit No. setting switch
(S004 and S005)
(Check the link wiring.)
<Outdoor unit control PCB>
Unit No. setting switch
(S002 and S003)
When multiple outdoor main units exist, disconnect the terminals
Refer to Fig. 8-4
extended from the shorted plugs (CN003) at all outdoor main unit
NO
CASE 3B CASE 3A
Is it OK to start the compressors?
Recheck the items to check before the test run.
Have the outdoor sub units been connected?
YES
Set the unit address.
Set the No. of outdoor units.
Set the No. of indoor units.
Are the inter-unit control wires
connected to more than 1 refrigerant
system?
YES
Set the system address.
Alternatively, move the sockets to the OPEN side.
PCBs except for 1.
Is it possible to turn ON the power only
for the 1 refrigerant system where the
test run will be performed?
NO
Will automatic address setting be
performed in Heating mode?
YES
Is it OK to start the compressors?
NO
*1
*1 The unit with the unit
No. set to 1 is the
main unit. All other
units are sub units.
CASE 1
NO
Note: It is not necessary to remove
the socket that is used to
short-circuit the terminal plugs
from the outdoor sub unit
PCBs.
CASE 2
YES
Make necessary corrections.
Tur n OFF the indoor and
outdoor unit power.
Check the alarm contents.
Items to Check Before the Test Run
1. Turn the remote power switch on at
least 5 hours before the test, in order
to energize the crank case heater.
2. Turn the outdoor service valves (4
locations) to the full-open positions.
●
Use caution when making the
settings. If there are duplicated
system addresses, or if the settings
for the Nos. of the indoor units are not
consistent, an alarm will occur and
the system will not start.
●
These settings are not made on the
indoor unit PCB.
Tur n ON the indoor and
outdoor unit power for that
refrigerant system only.
Short-circuit the automatic address pin (CN100)
on the outdoor main unit PCB for 1 second or
longer, then release it.
LED 1 and 2 blink alternately
(about 2 or 3 minutes).
Tur n ON the indoor and
outdoor unit power.
*2
Short-circuit the mode change pin
(CN101) on the outdoor main unit PCB.
At the same time, short-circuit the
automatic address pin (CN100) for 1
second or longer, then release it.
*3 *3
Start indoor and outdoor unit
cooling operation.
LED 1 and 2 blink alternately.
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
Check that test run preparation is OK.
(Do not allow the short-circuited pins to remain short-circuited.)
Set the wired remote controller for test run.
Refer to the remote
controller test-run
settings.
Does system operate?
Return remote control to normal mode
End test run.
Tur n ON the indoor and
outdoor unit power.
*2
Short-circuit the automatic address
pin (CN100) on the outdoor main
unit PCB for 1 second or longer,
then release it.
Start indoor and outdoor unit
heating operation.
LED 1 and 2 blink alternately.
NO
YES
NO
YES
Make necessary
corrections
Tur n OFF the indoor
and outdoor unit power.
Check the alarm
contents.
Refer to “Table of
Self-Diagnostic Functions and
Description of Alarm Displays.”
*2 A minimum of 5 hours must have
passed after the power was turned
ON to the outdoor unit.
*3 All indoor units operate in all
refrigerant systems where the
power is ON.
Check and make corrections according to
“Table of Self-Diagnostic Functions.”
Fig. 8-3
NO
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
YES
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L Examples of the No. of indoor units settings (S005, S004)
No. of indoor units
1 unit (factory setting)
11 units
21 units
31 units
40 units
Indoor unit setting (S005)
(3P DIP switch, blue)
All OFF
1 ON
2 ON
3 ON
1 & 3 ON
10 20 30
ON
1
ON
1
ON
1
ON
1
ON
1
ON
3
2
OFF
ON
3
2
OFF
ON
3
2
OFF
ON
3
2
OFF
ON
3
2
OFF
Indoor unit setting (S004)
(Rotary switch, red)
1
Set to 1
1
Set to 1
1
Set to 1
1
Set to 1
0
Set to 0
L Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used) (S003, S002)
System address No.
System 1 (factory setting)
System 11
System 21
System 30
System address (S003)
(2P DIP switch, blue)
Both OFF
1 ON
2 ON
1 & 2 ON
10 20
ON
ON
ON
ON
ON
2
OFF
1
ON
2
1
OFF
ON
2
OFF
1
ON
2
1
OFF
System address (S002)
(Rotary switch, black)
1
Set to 1
1
Set to 1
1
Set to 1
0
Set to 0
L Examples of the No. of outdoor units settings (S006)
No. of outdoor units
1 unit (factory setting)
2 units
3 units
4 units
Outdoor unit setting (S006)
(3P DIP switch, blue)
ON
1 ON
2 ON
1 & 2 ON
3 ON
1
ON
12
ON
1
ON
1
2
2
2
ON
3
OFF
ON
3
OFF
ON
3
OFF
ON
3
OFF
L Address setting of main outdoor unit (S007)
Unit No. setting
Unit No. 1 (main unit)
(factory setting)
Address setting of outdoor unit (S007)
(3P DIP switch, blue)
ON
21ON3
OFF
L Address setting of sub outdoor unit
Unit No. setting
Unit No. 2 (sub unit)
(factory setting)
Unit No. 3 (sub unit)
Unit No. 4 (sub unit)
Address setting of outdoor unit (S007)
(3P DIP switch, blue)
ON
2 ON
12
ON
1 & 2 ON
3 ON
21
21ON3
ON
3
OFF
ON
3
OFF
ON
OFF
The sub unit control PCB contains the same switches as the main unit control PCB for No. of indoor units, No. of outdoor units,
and system address. However it is not necessary to set these switches.
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8-3. Main Outdoor Unit PCB Setting
Fig. 8-4
86
CN003
CN101
CN100
S003
S002S004S005S006S007
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8-4. Auto Address Setting
Basic wiring diagram: Example (1)
• If link wiring is not used
(The inter-unit control wires are not connected to multiple refrigerant systems.)
Indoor unit addresses can be set without operating the compressors.
No. 1 (main unit)
settings
System address
(system 1 setting)
(S003)(S002)
ON
1
No. of
outdoor
units (2 units
setting)
ON
2
1
OFF
(S006) (S007)
ON
ON
2
3
1
OFF
No. of indoor units
(10 units setting)
(S004)
(S005)
1ON3
Unit number
setting
(Unit No. 1)
0
ON
2
OFF
ON
ON
1
2
3
OFF
No. 2 (sub unit)
Unit
number
setting
(Unit No. 2)
settings
(S007)
ON
123
ON
OFF
Outdoor Unit
Unit
No. 1
(Main)
Outdoor main/sub
Unit
No. 2
(Sub)
control wiring
Inter-unit control wiring
Indoor Unit
1-1
1-2 1-3
1-10
Remote controller
Remote controller
cross-over wiring
Fig. 8-5
(1) Automatic Address Setting from the Outdoor Unit
1. On the outdoor main unit control PCB, check that the system address rotary switch (S002) is set to “1” and that
the DIP switch (S003) is set to
ON
ON
“0.” (These are the settings at the time of factory shipment.)
1
2
OFF
2. To set the number of indoor units that are connected to the outdoor unit to 10, on the outdoor main unit control
PCB set the No. of indoor units DIP switch (S005) to
ON
1
ON
“1,” and set the rotary switch (S004) to “0.”
2
3
OFF
3. To set the number of outdoor units, on the outdoor main unit control PCB set the No. of outdoor units DIP switch
(S006) to
ON
1
ON
(2 units), and set the unit No. DIP switch (S007) to
2
3
OFF
4. On the No. 2 (sub) unit control PCB, set the unit No. switch (S007) to
ON
ON
1
3
2
1
(unit No. 1 – main).
2
3
(unit No. 2).
5. Turn ON the power to the indoor and outdoor units.
6. On the outdoor main unit control PCB, short-circuit the automatic address pin (CN100) for 1 second or longer,
then release it.
↓
(Communication for automatic address setting begins.)
↓
* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.
The LED that indicates that automatic address setting is in progress turns OFF and the process is
stopped. Be sure to perform automatic address setting again.
(Automatic address setting is completed when LEDs 1 and 2 on the outdoor main unit control PCB turn OFF.)
↓
7. Operation from the remote controllers is now possible.
* To perform automatic address setting from the remote controller, perform steps 1 to 5, then use the remote controller and
complete automatic address setting.
●
Refer to “Automatic Address Setting from the Remote Controller.”
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Basic wiring diagram: Example (2)
System address
(system 1 setting)
(S003)(S002)
1
No. of
outdoor units
(2 units
setting)
• If link wiring is used
No. 1 (main unit) settings
No. of indoor units
(13 units setting)
ON
ON
2
1
OFF
(S006)
ON
ON
2
3
1
OFF
Outdoor unit
system 1
Indoor unit
(S004)
(S005)
ON
3
2
1
Unit
number
setting
(unit No. 1)
Unit
No. 1
(Main)
1-1 1-2
Remote
controller
3
ON
OFF
(S007)
ON
ON
2
3
1
OFF
Leave the socket that
is used to short-circuit
the terminal plug.
(CN003)
* When multiple outdoor main units exist, remove the socket that
is used to short-circuit the terminal plug (CN003) from all
outdoor main unit PCBs except for 1.
Alternatively, move the sockets to the “OPEN” side.
No. 2 (sub unit)
settings
Unit
number
setting
(unit No. 2)
(S007)
ON
123
ON
OFF
Unit
No. 2
(Sub)
Inter-unit control wiring
1-3 1-13
Remote controller
communication wiring
No. 1 (main unit) settings
System address
(system 2 setting)
(S003)(S002)
ON
2
No. of
outdoor
units (2 units
setting)
1
2
(S006)
ON
123
Outdoor unit
system 2
ON
OFF
ON
OFF
No. of indoor units
(9 units setting)
(S004)
9
(S005)
1ON3
Unit
number
setting
(unit No. 1)
ON
2
OFF
(S007)
ON
2
1
Unit
No. 1
(Main)
No. 2 (sub unit) settings
Unit
number
ON
setting
OFF
(unit No. 2)
3
Leave the socket
that is used to open
circuit the terminal
plug (CN003).
Inter-unit control wiring
To other system
link wiring
Indoor unit
Remote
controller
2-1 2-2 2-9
Remote controller
cross-over wiring
Make settings as appropriate for the cases listed below.
(Refer to the instructions on the following pages.)
• Indoor and outdoor unit power can be turned ON for each system separately.
• Indoor and outdoor unit power cannot be turned ON for each system separately.
Automatic address setting in Heating mode
Automatic address setting in Cooling mode
(S007)
ON
123
ON
OFF
Unit
No. 2
(Sub)
Outdoor main/sub control wiring
Case 1
Case 2
Case 3
Fig. 8-6
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Case 1
●
Indoor and outdoor unit power can be turned ON for each system separately.
Automatic Address Setting (no compressor operation)
Indoor unit addresses can be set without operating the compressors.
Automatic Address Setting from Outdoor Unit
1. On the outdoor main unit control PCB, check that the system address rotary switch (S002) is set to “1” and that
the DIP switch (S003) is set to “0”
ON
1
ON
. (These are the settings at the time of factory shipment.)
2
OFF
2. To set the number of indoor units that are connected to the outdoor unit to 13, on the outdoor main unit control
PCB set the No. of indoor units DIP switch (S005) to “1”
3. To set the number of outdoor units, on the outdoor main unit control PCB set the No. of outdoor units DIP switch
(S006) to
ON
1
ON
(2 units).
2
3
OFF
ON
1
ON
, and set the rotary switch (S004) to “3.”
2
3
OFF
ON
4. On the No. 1 (main) unit control PCB, set the unit No. switch (S007) to
On the No. 2 (sub) unit control PCB, set the unit No. switch (S007) to
ON
1
1
2
2
3
(unit No. 2).
3
(unit No. 1).
5. At the outdoor main unit where all indoor and outdoor unit power has been turned ON, short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.
↓
(Communication for automatic address setting begins.)
↓
* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.
The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.
Be sure to perform automatic address setting again.
(Automatic address setting is completed when LEDs 1 and 2 on the outdoor main unit control PCB turn OFF.)
↓
6. Next turn the power ON only for the indoor and outdoor units of the next (different) system. Repeat steps 1 – 5
in the same way to complete automatic address settings for all systems.
↓
7. Operation from the remote controllers is now possible.
* To perform automatic address setting from the remote controller, perform steps 1 – 4, then use the remote controller and
complete automatic address setting.
●
Refer to “Automatic Address Setting from Remote Controller.”
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Case 2
●
Indoor and outdoor unit power cannot be turned ON for each system separately.
Automatic Address Setting in Heating Mode
In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating.
Therefore perform this process only after completing all refrigerant tubing work.
Automatic Address Setting from Outdoor Unit
1. Perform steps 1 – 4 in the same way as for
Case 1
.
2. Turn the indoor and outdoor unit power ON at all systems.
3. To perform automatic address setting in
↓
Heating mode
, on the outdoor main unit control PCB in the refrigerant system where you wish to set the addresses, short-circuit the automatic address pin (CN100) for 1 second
or longer, then release it.
(Be sure to perform this process for one system at a time. Automatic address settings cannot be performed for
more than one system at the same time.)
↓
(Communication for automatic address setting begins, the compressors turn ON, and automatic address
setting in Heating mode begins.)
(All indoor units operate.)
↓
* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.
The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.
Be sure to perform automatic address setting again.
(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the main unit control
PCB turn OFF.)
4. At the outdoor main unit in the next (different) system, short-circuit the automatic address pin (CN100) for 1
second or longer, then release it.
↓
(Repeat the same steps to complete automatic address setting for all units.)
↓
5. Operation from the remote controllers is now possible.
* To perform automatic address setting from the remote controller, perform steps 1 – 5, then use the remote controller and
complete automatic address setting.
●
Refer to “Automatic Address Setting from Remote Controller.”
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Case 3
●
Indoor and outdoor unit power cannot be turned ON for each system separately.
Automatic Address Setting in Cooling Mode
In the following, automatic setting of indoor unit addresses is not possible if the compressors are not operating.
Therefore perform this process only after completing all refrigerant tubing work.
Automatic address setting can be performed during Cooling operation.
Automatic Address Setting from Outdoor Unit
1. Perform steps 1 – 4 in the same way as for
Case 1
.
2. Turn the indoor and outdoor unit power ON at all systems.
3. To perform automatic address setting in
↓
Cooling mode
, on the outdoor main unit control PCB in the refrigerant system where you wish to set the addresses, short-circuit the mode change 2P pin (CN101). At the same
time, short-circuit the automatic address pin (CN100) for 1 second or longer, then release it. (Be sure to perform
this process for one system at a time. Automatic address settings cannot be performed for more than one system at the same time.)
↓
(Communication for automatic address setting begins, the compressors turn ON, and automatic address
setting in Cooling mode begins.)
(All indoor units operate.)
↓
* To cancel, again short-circuit the automatic address pin (CN100) for 1 second or longer, then release it.
The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.
Be sure to perform automatic address setting again.
(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor main
unit control PCB turn OFF.)
4. At the outdoor main unit in the next (different) system, short-circuit the automatic address pin (CN100) for 1
second or longer, then release it.
↓
(Repeat the same steps to complete automatic address setting for all units.)
↓
5. Operation from the remote controllers is now possible.
Automatic Address Setting* from the Remote Controller
Selecting each refrigerant system individually for automatic address setting
---Automatic address setting for each system: Item code “A1”
1. Press the remote controller timer time
button and button at the
same time. (Press and hold for 4 seconds or longer.)
2. Next, press either the temperature setting
or button.
(Check that the item code is “A1.”)
3. Use either the
or button to set the system No. to perform
automatic address setting.
4. Then press the
button.
(Automatic address setting for one refrigerant system begins.)
(When automatic address setting for one system is completed, the system returns to normal stopped status.) <Approximately 4 – 5 minutes is
required.>
(During automatic address setting, “NOW SETTING” is displayed on the remote controller. This message disappears when automatic address setting is completed.)
5. Repeat the same steps to perform automatic address setting for each successive system.
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Display during automatic address setting
On outdoor main unit PCB
●
1
2
LED
* Do not short-circuit the automatic address setting pin (CN100) again while automatic address set-
ting is in progress. Doing so will cancel the setting operation and will cause LEDs 1 and 2 to turn
Blink alternately
OFF.
* When automatic address setting has been successfully completed, both LEDs 1 and 2 turn OFF.
* LED 1 is D72. LED 2 is D75.
* If automatic address setting is not completed successfully, refer to the table below and correct the problem. Then perform
automatic address setting again.
Display details of LEDs 1 and 2 on the outdoor unit control PCB
●
( : ON : Blinking : OFF)
LED 1 LED 2
After the power is turned ON (and automatic address setting is not in progress), no communication with the indoor
units in that system is possible.
After the power is turned ON (and automatic address setting is not in progress), 1 or more indoor units are
confirmed in that system; however, the number of indoor units does not match the number that was set.
Display meaning
Alternating
Simultaneous
Alternating
Automatic address setting is in progress.
Automatic address setting completed.
At time of automatic address setting, the number of indoor units did not match the number that was set.
“ ” (when indoor units are operating) indication appears on the display.
Refer to “Table of Self-Diagnostic Functions and Description of Alarm Displays.”
Note: “ ” indicates that the solenoid is fused or that there is a CT detection current failure (current is detected when the
compressor is OFF).
Remote controller display
●
is blinking
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Request concerning recording the indoor/outdoor unit combination Nos.
After automatic address setting has been completed, be sure to record them for future reference.
List the outdoor main unit system address and the addresses of the indoor units in that system in an easily visible location (next to the nameplate), using a permanent marking pen or similar means that cannot be abraded easily.
Example: (Outdoor) 1 – (Indoor) 1-1, 1-2, 1-3… (Outdoor) 2 – (Indoor) 2-1, 2-2, 2-3…
These numbers are necessary for later maintenance. Please be sure to indicate them.
Checking the indoor unit addresses
Use the remote controller to check the indoor unit address.
<If 1 indoor unit is connected to 1 remote controller>
1. Press and hold the
button and button for 4 seconds or longer (simple settings mode).
2. The address is displayed for the indoor unit that is connected to the remote controller.
(Only the address of the indoor unit that is connected to the remote controller can be checked.)
3. Press the
button again to return to normal remote controller mode.
<If multiple indoor units are connected to 1 remote controller (group control)>
1. Press and hold the
button and button for 4 seconds or longer
(simple settings mode).
2. “ALL” is displayed on the remote controller.
3. Next, press the
button.
4. The address is displayed for 1 of the indoor units which is connected to
the remote controller. Check that the fan of that indoor unit starts and that
air is discharged.
5. Press the
button again and check the address of each indoor unit
in sequence.
6. Press the
button again to return to normal remote controller mode.
Number changes to indicate which
indoor unit is currently selected.
8-5. Remote Controller Test Run Settings
1. Press the remote controller
button for 4 seconds or longer. Then press the button.
“TEST RUN” appears on the LCD display while the test run is in progress.
The temperature cannot be adjusted when in Test Run mode.
(This mode places a heavy load on the machines. Therefore use it only when performing the test run.)
2. The test run can be performed using the HEAT, COOL, or FAN operation modes.
Note: The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after opera-
tion is stopped.
3. If correct operation is not possible, a code is displayed on the remote controller LCD display.
(Refer to “Table of Self-Diagnostic Functions” and correct the problem.)
4. After the test run is completed, press the
button again. Check that “TEST RUN” disappears from the LCD display. (To prevent continuous test runs, this remote controller includes a timer function that cancels the test run after
60 minutes.)
* If the test run is performed using the wired remote controller, operation is possible even if the cassette-type ceiling
panel has not been installed. (“P09” display does not occur.)
8-6. Caution for Pump Down
Pump down means refrigerant gas in the system is returned to the outdoor unit. Pump down is used when the unit is to
be moved, or before servicing the refrigerant circuit. (Refer to the Service Manual)
This outdoor unit cannot collect more than the rated refrigerant amount as shown by the
CAUTION
nameplate on the back.
If the amount of refrigerant is more than that recommended, do not conduct pump down.
In this case use another refrigerant collecting system.
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8-7. Meaning of Alarm Messages
Table of Self-Diagnostics Functions and Description of Alarm Displays
Alarm messages are indicated by the blinking of LED 1 and 2 (D72, D75) on the outdoor unit PCB. They are also
displayed on the wired remote controller.
●
Viewing the LED 1 and 2 (D72 and D75) alarm displays
LED 1
Alternating
LED 2
Alarm display
LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats.
M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarm
N = Alarm No.
( : Blinking)
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).
Indoor unit is detecting error
signal from main outdoor unit.
Improper setting of indoor unit or
remote controller.
During auto. address setting,
number of connected units does
not correspond to number set.
When turning on the power
supply, number of connected
units does not correspond to
number set.
(Except R.C. address is “0”.)
Indoor unit communication error
of group control wiring.
Improper setting.
Alarm contents
Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.
Alarm is “P17”.
Error in receiving serial communication signal.
(Signal from main indoor unit in case of group control)
Ex: Auto address is not completed.
Error in transmitting serial communication signal.
Error in receiving serial communication signal.
When turning on the power supply, the number of connected
indoor units does not correspond to the number set. (Except R.C.
address is “0”.)
Error of the main outdoor unit in receiving serial communication
signal from the indoor unit.
Indoor unit address setting is duplicated.
Remote controller address connector (RCU. ADR) is duplicated.
(Duplication of main remote controller)
Starting auto. address setting is prohibited.
This alarm message shows that the auto address connector CN100
is shorted while other RC line is executing auto address operation.
Error in auto. address setting. (Number of connected indoor units
is less than the number set.)
Error in auto. address setting. (Number of connected indoor units
is more than the number set.)
No indoor unit is connected during auto. address setting.
Main outdoor unit is detecting error signal from sub outdoor unit.
Error of outdoor unit address setting.
The number of connected main and sub outdoor units do not
correspond to the number set at main outdoor unit PCB.
Error of sub outdoor unit in receiving serial communication signal
from main outdoor unit.
Error of main indoor unit in receiving serial communication signal
from sub indoor units.
This alarm message shows when an indoor unit for multiple-use
is not connected to the outdoor unit.
Duplication of main indoor unit address setting in group control.
Duplication of outdoor R.C. address setting.
Group control wiring is connected to individual control indoor unit.
Indoor unit address is not set.
Capacity code of indoor unit is not set.
Capacity code of outdoor unit is not set.
Mis-match connection of outdoor units that have different kinds of
refrigerant.
Alarm
message
<E01>
<E02>
<<E03>>
E04
<E06>
E08
<<E09>>
E12
E15
E16
E20
E24
E25
E26
E29
E18
L02
<L03>
L04
L07
L08
<<L09>>
L10
L17
Continued
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Possible cause of malfunction
Activation of
protective
device
Thermistor
fault
EEP ROM on indoor unit P.C.B. failure
Protective
device for
compressor is
activated
Protective device in indoor unit
is activated.
Protective device in outdoor
unit is activated.
Indoor thermistor is either open
or damaged.
Outdoor thermistor is either
open or damaged.
Protective device for compressor
No. 1 is activated.
Protective device for compressor
No. 2 is activated.
Protective device for compressor
No. 3 is activated.
Oil sensor fault.
(Disconnection, etc.)
Thermal protector in indoor unit fan motor is activated.
Improper wiring connections of ceiling panel.
Float switch is activated.
Incorrect discharge temperature. (Comp. No. 1)
High pressure switch or over load relay is activated.
Power supply voltage is unusual. (The voltage is less than 160 V
between L1 and L2 phase.)
Negative (defective) phase.
2 sensor (detects low oxygen level) activated
O
Compressor running failure resulting from missing phase in the
compressor wiring, etc. (Start failure not caused by IPM or no gas.)
Incorrect discharge temperature. (Comp. No. 2)
Compressor 3 discharge temp. failure
Outdoor unit fan motor is unusual.
Overcurrent at time of compressor runs more than 80Hz (DCCT
secondary current or ACCT primary current is detected at a time
other than when IPM has tripped.)
IPM trip (IPM current or temperature)
Inverter for compressor is unusual. (DC compressor does not
operate.)
Indoor coil temp. sensor (E1)
Indoor coil temp. sensor (E2)
Indoor coil temp. sensor (E3)
Indoor suction air (room) temp. sensor (TA)
Indoor discharge air temp. sensor (BL)
Comp. No. 1 discharge gas temp. sensor (DISCH1)
Comp. No. 2 discharge gas temp. sensor (DISCH2)
Outdoor No. 1 coil gas temp. sensor
Outdoor No. 1 coil liquid temp. sensor
(EXG1)
(EXL1)
Outdoor air temp. sensor (AIR TEMP)
Compressor intake port temperature sensor (RDT)
High pressure sensor.
Negative (defective) N phase.
Low-pressure sensor failure
Compressor 3 discharge temp. sensor failure (DISCH3)
Outdoor No. 2 coil gas temp. sensor (EXG2)
Outdoor No. 2 coil liquid temp. sensor (EXL2)
Outdoor No. 3 coil gas temp. sensor (EXG3)
Outdoor No. 3 coil liquid temp. sensor (EXL3)
EEP ROM on the main or sub outdoor unit PCB has failed.
Overload current is detected.
Lock current is detected.
Current is not detected when comp. No. 1 is ON.
Compressor No. 2 current trouble (overcurrent)
Compressor No. 2 current trouble (locked)
Compressor No. 2 CT sensor disconnected or short circuit
Compressor No. 2 discharge temp. sensor disconnected
Compressor No. 3 current trouble (overcurrent)
Compressor No. 3 current trouble (locked)
Compressor No. 3 CT sensor disconnected or short circuit
Compressor No. 3 discharge temp. sensor disconnected
Low pressure switch is activated.
Comp. No. 1 oil sensor
Comp. No. 2 oil sensor
Comp. No. 3 oil sensor
Alarm
message
<<P01>>
<<P09>>
<<P10>>
P03
P04
P05
P14
P16
P17
P18
P22
P26
H31
P29
<<F01>>
<<F02>>
<<F03>>
<<F10>>
<<F11>>
F04
F05
F06
F07
F08
F12
F16
F17
F22
F23
F24
F25
F26
F29
F31
H01
H02
H03
H11
H12
H13
H15
H21
H22
H23
H25
H06
H08
H27
H28
Continued
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Alarm messages displayed on system controller
Serial
communication
errors
Mis-setting
Activation of
protective
device
Error in transmitting serial
communication signal
Error in receiving serial
communication signal
Protective device of sub indoor
unit in group control is activated.
Indoor or main outdoor unit is not operating correctly.
Mis-wiring of control wiring between indoor unit, main outdoor unit
and system controller.
Indoor or main outdoor unit is not operating correctly.
Mis-wiring of control wiring between indoor unit, main outdoor unit
and system controller.
CN1 is not connected properly.
When using wireless remote controller or system controller, in
order to check the alarm message in detail, connect wired
remote controller to indoor unit temporarily.
NOTE
1. Alarm messages in << >> do not affect other indoor unit operations.
2. Alarm messages in < > sometimes affect other indoor unit operations depending on the fault.
C05
C06
P30
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9. APPENDIX
9-1. 4-Way Air Discharge Semi-Concealed Type (X, XM Types)
■
NAME OF PARTS
X type (4-WAY)
Water drain
Ceiling panel
(optional)
Air outlet
(4 locations)
XM type (4-WAY)
Water drain
Ceiling panel
(optional)
Air outlet
(4 locations)
X
XM
■
CARE AND CLEANING
WARNING
Air intake grille
(air intake)
1. For safety, be sure to turn the air conditioner off and also to disconnect the power before
cleaning.
Air intake grille
(air intake)
2. Do not pour water on the indoor unit to clean it. This will damage the internal components
and cause an electric shock hazard.
Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them
(Indoor unit) with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with water. When cleaning the air outlet side,
be careful not to force the vanes out of place.
1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe plastic
CAUTION
parts using very hot water.
2. Some metal edges and the fins are sharp and may cause injury if handled improperly; be
especially careful when you clean these parts.
3. The internal coil and other components must be cleaned regularly. Consult your dealer or
service center.
Air filter
The air filter collects dust and other particles from the air and should be cleaned at regular intervals
as indicated in the table below or when the filter indication (
) on the display of the remote control
unit (wired type) shows that the filter needs cleaning. If the filter gets blocked, the efficiency of the air
conditioner drops greatly.
Type Period
X, XM 6 months
NOTE
The frequency with which the filter should be cleaned depends on the environment in which the
unit is used.
<How to clean the filter>
1. Remove the air filter from the air intake grille.
2. Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter, wash the
filter in lukewarm, soapy water, rinse it in clean water, and dry it.
<How to remove the filter>
1. Use a screwdriver to remove the bolt screw on each side for the two latches. (Be sure to
reattach the two bolt screws after cleaning.)
2. Press on the two latches of the air intake grille with your thumbs in the direction of the
arrow to open the grille.
3. Open the air intake grille downward.
●
When cleaning the air filter, never remove the safety chain. If it is necessary to remove it
CAUTION
for servicing and maintenance inside, be sure to reinstall the safety chain securely (hook
on the grille side) after the work.
●
When the filter has been removed, rotating parts (such as the fan), electrically charged
areas, etc. will be exposed in the unit’s opening. Bear in mind the dangers that these parts
and areas pose, and proceed with the work carefully.
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X
XM
4. Remove the air filter attached to the air intake grille.
X type (4-WAY) XM type (4-WAY)
Latch
Air intake
grille
Safety chain
Bolt screws
Air filter
Air intake
grille
Latch
Safety chain
Screw
Air filter
CAUTION
erly; special care should be taken when you clean these parts.
2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt or
soot.
3. The internal coil and other components of the outdoor unit must also be cleaned periodically.
Consult your dealer or service center.
1. Certain metal edges and the condenser fins are sharp and may cause injury if handled improp-
Care: After a prolonged idle period
Check the indoor and outdoor unit air intakes and outlets for blockage; if there is a blockage, remove it.
Care: Before a prolonged idle period
• Operate the fan for half a day to dry out the inside.
• Disconnect the power supply and also turn off the circuit breaker.
• Clean the air filter and replace it in its original position.
• Outdoor unit internal components must be checked and cleaned periodically. Contact
your local dealer for this service.
■
TROUBLESHOOTING
If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or a service center.
Trouble
Air conditioner does not r un at all 1. Power f ailure. 1.
2. Leakage circuit break er has
3. Line v oltage is too lo w.
4. Operation b utton is tur ned off .
5. The wired remote control unit or heat pump is
malfunctioning.
(
The in spection ma rk and t he
H , L , P in
the LCD of t he wire d
on
Compressor r uns b ut soon s tops 1. Obstruction in front of condenser coil 1. Remo ve obstruction
Poor cooling (or heating) performance 1. Dirty or clogged air filter . 1. Clean air filter to impro ve the
2. Heat source or man y people in
3. Doors and/or windows are open.
4. Obstacle near air intak e or air
5. Thermostat is set too high f or
(or too lo w f or heating).
6. (Defrosting system does not w ork.)
Possible Cause
tripped.
letters E, F ,
combination wit h numbers
remote co ntrol u nit.)
room.
discharge por t.
cooling
appear
Remedy
After a po wer outage, pr ess O N/ OFF operation b utton
o nthe
2. Contact ser vice center .
3. Consult y our electr ician or dealer .
4. Press the b utton again.
5. Consult y our dealer .
2. Eliminate heat source if possib le.
3. Shut them to k eep the heat (or
4. Remove it to e nsure good airflo w.
5. Set the temper ature lo wer (or
6. (Consult y our dealer .)
wired re mote control unit.
airflow.
cold) out.
higher).
Tips for Energy Saving
■
Avoid
• Do not block the air intake and outlet of the unit. If either is obstructed, the unit
will not work well, and may be damaged.
• Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls
and ceiling of the room are warmed by the sun, it will take longer to cool the room.
• Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter
Do
will impair the performance of the unit.
• To prevent conditioned air from escaping, keep windows, doors and any other openings
closed.
NOTE
Should the power fail while the unit is running
If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is
restored using the same settings before the power was interrupted.
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9-2. 1-Way Air Discharge Semi-Concealed Type (A Type)
NAME OF PARTS
■
SEMI-CONCEALED
A type (1-WAY)
Wa t e r d r a i n
Air outlet
Air intake
Ceili ng p a nel
(op t io na l)
CARE AND CLEANING
■
1. For safety, be sure to turn the air conditioner off and also to disconnect the power
WARNING
before cleaning.
2. Do not pour water on the indoor unit to clean it. This will damage the internal components and cause an electric shock hazard.
Air intake and outlet side Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them
(Indoor unit) with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with water. When cleaning the air outlet side,
be careful not to force the vanes out of place.
1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe
CAUTION
plastic parts using very hot water.
2. Some metal edges and the fins are sharp and may cause injury if handled improperly;
be especially careful when you clean these parts.
3. The internal coil and other components must be cleaned regularly. Consult your dealer
or service center.
A
Air filter
The air filter collects dust and other particles from the air and should be cleaned at regular intervals
as indicated in the table below or when the filter indication (
unit (wired type) shows that the filter needs cleaning. If the filter gets blocked, the efficiency of the air
conditioner drops greatly.
Type A
Period 2 weeks
NOTE
The frequency with which the filter should be cleaned depends on the environment in which the unit is used.
<How to clean the filter>
1. Remove the air filter from the air intake grille.
2. Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter,
wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it.
<How to remove the filter>
1-way air discharge semi-concealed type (A):
1. Take hold of the finger-hold on the air intake grille and press it to
the rear, and the grille will open downward.
2. Take hold of the finger-hold on the air filter, pull it toward you.
) on the display of the remote control
Air filter finger-hold
Air intake grill
Air filter
Slide
Latch
Air filter finger-hold
*Take hold of the finger-hold on the air filter, pull it toward you.
Hook
Screw
Screw
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CAUTION
1. Certain metal edges and the condenser fins are sharp and may cause injury if handled
improperly; special care should be taken when you clean these parts.
2. Periodically check the outdoor unit to see if the air outlet or air intake is clogged with dirt
or soot.
3. The internal coil and other components of the outdoor unit must also be cleaned
periodically. Consult your dealer or service center.
A
Care: After a prolonged idle period
Check the indoor and outdoor unit air intakes and outlets for blockage; if there is a
blockage, remove it.
Care: Before a prolonged idle period
• Operate the fan for half a day to dry out the inside.
• Disconnect the power supply and also turn off the circuit breaker.
• Clean the air filter and replace it in its original position.
• Outdoor unit internal components must be checked and cleaned periodically.
Contact your local dealer for this service.
TROUBLESHOOTING
■
If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work
properly, contact your dealer or a service center.
Trouble
Air conditioner does not r un at all 1. Power f ailure. 1.
2. Leakage circuit break er has
3. Line v oltage is too lo w.
4. Operation b utton is tur ned off .
5. The wired remote control unit or heat pump is
malfunctioning.
(
The in spection ma rk and t he
H , L , P in
the LCD of t he wire d
on
Compressor r uns b ut soon s tops 1. Obstruction in front of condenser coil 1. Remo ve obstruction
Poor cooling (or heating) performance 1. Dirty or clogged air filter . 1. Clean air filter to impro ve the
2. Heat source or man y people in
3. Doors and/or windows are open.
4. Obstacle near air intak e or air
5. Thermostat is set too high f or
(or too lo w f or heating).
6. (Defrosting system does not w ork.)
Possible Cause
tripped.
letters E, F ,
combination wit h numbers
remote co ntrol u nit.)
room.
discharge por t.
cooling
appear
Remedy
After a po wer outage, pr ess O N/ OFF operation b utton
o nthe
2. Contact ser vice center .
3. Consult y our electr ician or dealer .
4. Press the b utton again.
5. Consult y our dealer .
2. Eliminate heat source if possib le.
3. Shut them to k eep the heat (or
4. Remove it to e nsure good airflo w.
5. Set the temper ature lo wer (or
6. (Consult y our dealer .)
wired re mote control unit.
airflow.
cold) out.
higher).
Tips for Energy Saving
■
NOTE
Should the power fail while the unit is running
If the power supply for this unit is temporarily cut off, the unit will automatically resume operation once power is
restored using the same settings before the power was interrupted.
Avoid
Do
• Do not block the air intake and outlet of the unit. If either is obstructed, the unit
will not work well, and may be damaged.
• Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls
and ceiling of the room are warmed by the sun, it will take longer to cool the room.
• Always try to keep the air filter clean. (Refer to “Care and Cleaning.”) A clogged filter
will impair the performance of the unit.
• To prevent conditioned air from escaping, keep windows, doors and any other openings
closed.
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