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Page a
INSTALLATION INSTRUCTIONS
– Mini ECO-i System Air Conditioner –
X
for Refrigerant R410A
R410A Models
Indoor Units
Class
7
9
X
4-Way Air Discharge Semi-Concealed Type
A
1-Way Air Discharge Semi-Concealed Type
AHX0752
U
Concealed Duct Type
UHX0752
D
Concealed Duct
High-Static Pressure Type
T
Ceiling-Mounted Type
K
Wall-Mounted Type
KHX0752
KHX0952
Class
36
60
AHX0952
12
18
24
36
XHX1252
XHX1852
XHX2452
XHX3652
48
AHX1252
UHX1252
U
UHX1852
UHX2452
UHX3652
DHX3652
THX1252
THX1852
THX2452
KHX1252
KHX1852
KHX2452
DHX4852
Outdoor Units
C
A
D
T
K
Mini ECO-i
CHX03652 CHX06052
* Refrigerant R410A is used in the outdoor units.
Optional Controllers
Timer Wired Remote Controller
RCS-TM80BG
Wireless Remote Controller (For U, D Type)
RCS-BH80AAB.WL
Wireless Remote Controller (For X Type)
RCS-SH80AAB.WL
Wireless Remote Controller (For A, T Type)
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
85464359981002 ©SANYO 2006
SANYO Electric Co., Ltd.
Gunma, Japan
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Page 2
IMPORTANT!
Please Read Before Starting
reduce strain on your back. Sharp edges or thin aluminum fins
on the air conditioner can cut your fingers.
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.
When Installing…
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.
This product is intended for professional use.
Permission from the power supplier is required when
installing an outdoor unit that is connected to a 16 A distribution network.
Pay close attention to all warning and caution notices
given in this manual.
This symbol refers to a hazard or
unsafe practice which can result
WARNING
in severe personal injury or death.
CAUTION
…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.
This symbol refers to a hazard or
unsafe practice which can result
in personal injury or product or
property damage.
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.
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.
• Keep all tubing runs as short as possible.
In Case of Improper Installation
• Use the flare method for connecting tubing.
The manufacturer shall in no way be responsible for
improper installation or maintenance service, including failure to follow the instructions in this document.
• 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.
SPECIAL PRECAUTIONS
• Check carefully for leaks before starting the test run.
WARNING
When Servicing
When Wiring
• Turn the power OFF at the main power box (mains)
before opening the unit to check or repair electrical parts
and wiring.
ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO
WIRE THIS SYSTEM.
• 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.
• 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.
CAUTION
• Ground the unit following local electrical codes.
• 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.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
When Transporting
• 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.
Be careful when picking up and moving the indoor and outdoor
units. Get a partner to help, and bend your knees when lifting to
2
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Page 3
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
(1) No partition (shaded portion)
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
(2) When there is an effective opening with the adjacent
risk of suffocation if its density should rise excessively.
room for ventilation of leaking refrigerant gas (opening
Suffocation from leakage of refrigerant is almost non-exiswithout a door, or an opening 0.15% or larger than the
tent. With the recent increase in the number of high density
respective floor spaces at the top or bottom of the
buildings, however, the installation of multi air conditioner
door).
systems is on the increase because of the need for effective
use of floor space, individual control, energy conservation
Outdoor unit
by curtailing heat and carrying power, etc.
Refrigerant tubing
Most importantly, the multi air conditioner system is able to
Indoor unit
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
(3) If an indoor unit is installed in each partitioned room
so that if the refrigerant accidentally leaks out, its density
and the refrigerant tubing is interconnected, the
does not reach the limit (and in the event of an emergency,
smallest room of course becomes the object. But when
measures can be made before injury can occur).
mechanical ventilation is installed interlocked with a
In a room where the density may exceed the limit, create
gas leakage detector in the smallest room where the
an opening with adjacent rooms, or install mechanical
density limit is exceeded, the volume of the next
ventilation combined with a gas leak detection device.
smallest room becomes the object.
The density is as given below.
Refrigerant tubing
Total amount of refrigerant (oz)
Min. volume of the indoor unit installed room (ft.3)
< Density limit (oz/ft.3)
Outdoor unit
Very
small
room
The density limit of refrigerant which is used in multi air conditioners is 0.3 oz/ft.3 (ISO 5149).
Indoor unit
Small
room
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.
Large room
Mechanical ventilation device – Gas leak detector
3. The minimum indoor floor space compared with the
amount of refrigerant is roughly as follows (when the
ceiling is 8.8 ft. high):
Outdoor unit
ft.3
4000
e.g., charged
amount (529 oz)
Range below
the density limit of
0.3 oz/ft.3
(countermeasures
not needed)
3500
Min. indoor volume
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.
ft.2
454
3000
2500
398
341
284
227
2000
1500
Range above
the density limit of
0.3 oz/ft.3
(countermeasures
needed)
1000
500
0
0
200
400
600
114
57
0
800 1000 1200
Total amount of refrigerant
3
170
oz
Min. indoor floor area
(when the ceiling is 8.8 ft. high)
For the amount of charge in this example:
e.g., charged
amount (353 oz)
Medium
room
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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.”
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 prevent dirt, moisture, or other foreign substances
from entering. These substances can result in system malfunction.
CAUTION
Unit: in. (mm)
Material
Copper tube
O
Outer diameter
1/4 (6.35)
3/8 (9.52)
1/2 (12.7)
5/8 (15.88)
3/4 (19.05)
Wall thickness
1/32 (0.8)
1/32 (0.8)
1/32 (0.8)
5/128 (1.0)
5/128 (1.0)
1-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A
refrigerant deterioration and compressor defects. Due to the features of the refrigerant and refrigerating
machine oil, the prevention of water and other impurities becomes more important than ever.
2. Be sure to recharge the refrigerant only in liquid form.
2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause
defects of the unit.
2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining
refrigerant and recharge the required total amount of new refrigerant after fixing the leak.
3. Different tools required
3-1. Tool specifications have been changed due to the characteristics of R410A.
Some tools for R22- and R407C-type refrigerant systems cannot be used.
Item
R407C tools
New compatible
tool? with R410A?
Manifold gauge
Remarks
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.
* Using tools for R22 and R407C and new tools for R410A together can cause defects.
4
Vacuum pump
Outlet
Inlet
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Page 5
3-2. Use R410A exclusive cylinder only.
Valve
Single-outlet valve
(with siphon tube)
Liquid refrigerant should be recharged
with the cylinder standing on end as
shown.
Liquid
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.
R410A
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)
5
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CONTENTS
Page
Page
3-11. Checking the Drainage
3-12. Electrical Power Wiring
3-13. How to Install the Ceiling Panel
IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Please Read Before Starting
Check of Density Limit
Concealed Duct Type (U Type)
3-14. Required Minimum Space for Installation and
Service
3-15. Suspending the Indoor Unit
3-16. Installing the Drain Piping
3-17. Checking the Drainage
3-18. Increasing the Fan Speed
Precautions for Installation Using New Refrigerant
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 Size
1-6. Straight Equivalent Length of Joints
1-7. Additional Refrigerant Charge
1-8. System Limitations
1-9. Tubing Length
1-10. Check of Limit Density
1-11. Installing Distribution Joint
1-12. Optional Distribution Joint Kit
1-13. Example of Tubing Size Selection and
Refrigerant Charge Amount
Concealed Duct High-Static Pressure Type
(D Type)
3-19. Required Minimum Space for Installation and
Service
3-20. Suspending the Indoor Unit
3-21. Installing the Drain Piping
3-22. Caution for Ducting Work
3-23. Indoor Fan Performance
Ceiling-Mounted Type (T Type)
3-24. Required Minimum Space for Installation and
Service
3-25. Suspending the Indoor Unit
3-26. Duct for Fresh Air
3-27. Shaping the Tubing
3-28. Installing the Drain Piping
2. SELECTING THE INSTALLATION SITE . . . . . 17
2-1. Indoor Unit
2-2. Outdoor Unit
2-3. Air-Discharge Chamber for Top Discharge
2-4. Installing the Unit in Heavy Snow Areas
2-5. Precautions for Installation in Heavy Snow
Areas
2-6. Dimensions of Air-Discharge Chamber
2-7. Dimensions of Outdoor Unit with
Air-Discharge Chamber (field supply)
2-8. Dimensions of Snow Ducting
2-9. Dimensions of Outdoor Unit with Snow-Proof
Ducting (field supply)
Wall-Mounted Type (K Type)
3-29. Removing the Rear Panel from the Unit
3-30. Selecting and Making a Hole
3-31. Installing the Rear Panel onto the Wall
3-32. Removing the Grille to Install the Indoor Unit
3-33. Preparing the Tubing
3-34. Shaping the Tubing
3-35. Installing the Drain Hose
3-36. When Using Wireless Remote Controller
Instead of Wired Remote Controller
3. HOW TO INSTALL THE INDOOR UNIT . . . . . 25
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
4. HOW TO INSTALL THE OUTDOOR UNIT . . . 56
4-1. Installing the Outdoor Unit
4-2. Drainage Work
4-3. Routing the Tubing and Wiring
5. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . 57
5-1. General Precautions on Wiring
5-2. Recommended Wire Length and Wire
Diameter for Power Supply System
5-3. Wiring System Diagram
1-Way Air Discharge Semi-Concealed Type
(A Type)
3-8. Suspending the Indoor Unit
3-9. Placing the Unit Inside the Ceiling
3-10. Installing the Drain Piping
6
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Page
6. HOW TO PROCESS TUBING . . . . . . . . . . . . 61
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 . . . . . . . . . . . . . . . . . . . . . . . . . 65
Air Purging with a Vacuum Pump (for Test Run)
Preparation
8. TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8-1. Preparing for Test Run
8-2. Test Run Procedure
8-3. Outdoor Unit PCB Setting
8-4. Auto Address Setting
8-5. Caution for Pump Down
8-6. Meaning of Alarm Messages
9. APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9-1. 4-Way Air Discharge Semi-Concealed Type
(X Type)
9-2. 1-Way Air Discharge Semi-Concealed Type
(A Type)
9-3. Concealed Duct (High-Static Pressure) Type
(U, D Type)
9-4. Ceiling-Mounted Type (T Type)
9-5. Wall-Mounted Type (K Type)
7
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1. GENERAL
1-3. Type of Copper Tube and Insulation Material
This booklet briefly outlines where and how to install
the air conditioning system. Please read over the entire
set of instructions for the outdoor unit and make sure all
accessory parts listed are with the system before
beginning.
If you wish to purchase these materials separately from
a local source, you will need:
1-1.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
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.
Tools Required for Installation (not supplied)
Standard screwdriver
Phillips head screwdriver
Knife or wire stripper
Tape measure
Carpenter’s level
Sabre saw or key hole saw
Hacksaw
Core bits
Hammer
Drill
Tube cutter
Tube flaring tool
Torque wrench
Adjustable wrench
Reamer (for deburring)
3. Use insulated copper wire for field wiring. Wire size
varies with the total length of wiring.
Refer to 5. ELECTRICAL WIRING for details.
CAUTION
Check local electrical codes
and regulations before
obtaining wire. Also, check
any specified instructions or
limitations.
1-4. Additional Materials Required for Installation
1. Refrigeration (armored) tape
2. Insulated staples or clamps for connecting wire (See
your local codes.)
1-2. Accessories Supplied
3. Putty
See Tables 1-1 – 1-7.
4. Refrigeration tubing lubricant
5. Clamps or saddles to secure refrigerant tubing
6. Scale for weighing
Table 1-1 (Outdoor Unit)
Q’ty
Part name
Figure
Tube Discharge
Assy
Instruction manual
paper
03652
Model
06052
Model
(4 hp)
(6 hp)
0
1
1
1
hp = horsepower
8
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Page 9
Table 1-2 (4-Way Air Discharge Semi-Concealed)
Part Name
Figure
Q’ty
Remarks
Full-scale installation diagram
1
Printed on container box
Drain hose
1
For securing drain hose
Hose band
1
For securing drain hose
Drain insulator
1
For drain joint
1
For liquid tube
1
For gas tube
2
For gas tube joint
Packing
1
For drain joint
Wiring cover
1
For covering erectrical wiring
Screw
4
For full-scale installation diagram
Washer
8
For suspending indoor unit from ceiling
Screw
1
For fixing the wiring cover
Flare insulator
White
(heat-resisting)
Insulating tape
Table 1-3 (1-Way Air Discharge Semi-Concealed)
Part Name
Figure
Q’ty
Remarks
Full-scale installation diagram
1
Printed on container box
Drain hose
1
For securing drain hose
Hose band
1
For securing drain hose
Drain insulator
1
For drain joint
1
For liquid tube
1
For gas tube
2
For gas tube joint
Packing
1
For drain joint
Washer
8
For suspending indoor unit from ceiling
Screw
4
For full-scale installation diagram
Bushing
1
For electrical junction box
Flare insulator
White
(heat-resisting)
Insulating tape
Table 1-4 (Concealed Duct)
Part Name
Figure
Q’ty
Remarks
Drain hose
1
For securing drain hose
Hose band
1
For securing drain hose
Packing
1
For drain joint
Drain insulator
1
For drain joint
Flare insulator
1
For liquid tube
2
For gas and liquid tubes flare nuts
Flare insulator
1
For gas tube
Washer
8
For suspending indoor unit from ceiling
Sealing putty
1
For sealing recessed portion of power supply
Vinyl clamp
8
For flare and drain insulators
Insulating tape
White
(heat-resisting)
Use 3/8" for suspending bolts.
Field supply for suspending bolts and nuts.
9
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Table 1-5 (Concealed Duct High-Static Pressure)
Part Name
Figure
Q’ty
Remarks
Washer
8
For suspending indoor unit from ceiling
Nut
8
For suspending indoor unit from ceiling
1
For gas tube
1
For liquid tube
1
For drain pipe connection
Flare insulator
Drain socket
Table 1-6 (Ceiling-Mounted)
Part Name
Figure
Q’ty
Remarks
Full-scale installation diagram
1
Printed on container box
Washer
4
For temporarily suspending indoor unit from ceiling
2
T1/8"
Flare insulator
For gas and liquid tube joints
2
T3/16"
White
(heat-resisting)
2
For gas and liquid tubes flare nuts
8
For flare and drain insulators
1
For main unit and PVC pipe joints
Hose band
2
For drain hose connection
Drain insulator
1
For drain hose joint
Gum eyelet
1
For power supply inlet
Insulating tape
Vinyl clamp
Drain hose
L5-1/2"
Table 1-7 (Wall-Mounted)
Part Name
Figure
Q’ty
5/32" × 1"
Remarks
10
For fixing the rear panel
Plastic cover
1
For improved tubing appearance
Insulator
1
For insulating flare nut (2452 type only)
Tapping screw
1-5. Tubing Size
Table 1-8 Main Tubing Size (LA)
BTU/h (kW)
38,200 (11.2)
52,900 (15.5)
System horsepower
4
6
Gas tubing
ø5/8" (ø15.88)
Liquid tubing
ø3/4" (ø19.05)
ø3/8" (ø9.52)
Unit: in. (mm)
Table 1-9 Main Tubing Size After Distribution (LB, LC...)
Total capacity
after distribution
Tubing size
Below BTU/h 24,200 (2.5 hp) 38,200 (4 hp)
Over BTU/h
–
Gas tubing
ø1/2" (ø12.7)
Liquid tubing
ø3/8" (ø9.52)
47,800 (5 hp)
52,900 (6 hp)
24,200 (2.5 hp)
ø5/8" (ø15.88)
ø3/4" (ø19.05)
Unit: in. (mm)
hp = horsepower
ø3/8" (ø9.52)
Note: In case the total capacity of connected indoor units exceeds the total capacity of the outdoor units, select the main
tubing size for the total capacity of the outdoor units.
Table 1-10 Indoor Unit Tubing Connection (
Indoor unit type
7
9
12
1,
18
2...
n–1)
24
36
Gas tubing
ø1/2" (ø12.7)
ø5/8" (ø15.88)
Liquid tubing
ø1/4" (ø6.35)
ø3/8" (ø9.52)
10
48
Unit: in. (mm)
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Page 11
1-6. Straight Equivalent Length of Joints
Design the tubing system by referring to the following table for the straight equivalent length of joints.
Table 1-11 Straight Equivalent Length of Joints
Gas tubing size (in. (mm))
Unit: ft.
1/2" (12.7)
5/8" (15.88) 3/4" (19.05)
90° elbow
1
1.1
1.4
45° elbow
0.8
0.9
1
3
3.4
4.1
7.5
9.2
10.5
U-shape tube bend (R2-3/8" – 4" (60 – 100))
Trap bend
Y-branch distribution joint
Equivalent length conversion not needed.
Ball valve for service
Equivalent length conversion not needed.
Table 1-12 Required Copper Tubing Dimensions
Unit: in. (mm)
Material
Copper tube
O
Outer diameter
1/4 (6.35)
3/8 (9.52)
1/2 (12.7)
5/8 (15.88)
3/4 (19.05)
Wall thickness
1/32 (0.8)
1/32 (0.8)
1/32 (0.8)
5/128 (1.0)
over 5/128 (1.0)
1-7. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.
Table 1-13 Amount of Refrigerant Charge Per Meter, According to Liquid Tubing Size
Liquid tubing size
(in. (mm))
Amount of refrigerant
charge (oz/ft.)
ø1/4" (ø6.35)
0.279
Required amount of charge = (Amount of refrigerant
charge per meter of each size of liquid tube × its tube
length) + (...) + (...)
ø3/8" (ø9.52)
0.602
*Always charge accurately using a scale for weighing.
Table 1-14 Refrigerant Charge Amount at Shipment (for outdoor unit)
Heat pump unit
(Single-phase)
(oz)
CHX03652
CHX06052
123
123
1-8. System Limitations
Table 1-15 System Limitations
Outdoor units (Type)
Number of max. connectable indoor units
Max. allowable indoor/outdoor capacity ratio
CHX03652
CHX06052
6
9
50 – 130%
11
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Page 12
1-9. 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.
L1
L2
LA
LB
Main tube of unit
LD
LC
n
H1
1st branch
L3
2
1
3
H2
n-1
Unit distribution tube
Note: Do not use commercially available T-joints for the liquid tubing.
* Be sure to use special R410A distribution joints (APR: purchased separately) for outdoor
unit connections and tubing branches.
R410A distribution joint
APR-P160BA (for indoor unit)
Table 1-16 Ranges that Apply to Refrigerant Tubing Lengths and to Differences in Installation Heights
Items
Marks
Contents
L1
Allowable tubing
length
1
Allowable elevation
difference
Max. tubing length
L (L2 – L3)
1
, 2...
+ 2 +...
H1
H2
Actual length
n
n–1
+L1
Equivalent length
Length (ft.)
> 492
> 574
Difference between max. length and min.
length from the No.1 distribution joint
> 131
Max. length of each distribution tube
> 98
Total max. tubing length including length of
each distribution tube (only narrow tubing)
> 656
When outdoor unit is installed higher than indoor unit
> 164
When outdoor unit is installed lower than indoor unit
> 131
> 49
Max. difference between indoor units
L = Length, H = Height
12
3/19/07
WARNING
2:40 PM
Page 13
Always check the gas density
limit for the room in which the
unit is installed.
Minimum indoor volume & floor area as against the
amount of refrigerant is roughly as given in the following
table.
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 the leak detector.
(Total refrigerant charged amount: oz)
(Min. indoor volume where the indoor unit is installed: ft.3)
< Limit density 0.3 (oz/ft.3)
The limit density of refrigerant which is used in this unit 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.)
CAUTION
Min. indoor volume
1-10. Check of Limit Density
ft.3
10000
9500
9000
8500
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
0
ft.2
1136
1079
1022
Range below
966
the density limit of
909
0.3 oz/ft.3
852
(countermeasures
795
738
not needed)
682
625
568
511
454
398
341
Range above
284
the density limit of
227
0.3 oz/ft.3
170
(countermeasures
114
57
needed)
0
500 1000 1500 2000 2500 3000
oz
Total amount of refrigerant
Min. indoor floor area
(when the ceiling is 8.8 ft. high)
07-056 Mini_ECOi_II_NA
15
to
30
°
Tube branching methods (horizontal use)
B
Pay special attention to any
location, such as a basement,
etc., where leaking refrigerant
can accumulate, since refrigerant gas is heavier than air.
B
Horizontal A
line
View as seen
from arrow
A
Arrow view
1-11. Installing Distribution Joint
Types of vertical trap specifications
(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT”
enclosed with the optional distribution joint kit
(APR-P160BA).
(When using ball valve)
Main tubing
(2) 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.
Indoor unit (more than 2 units)
Ball valve
(If only 1 unit is connected,
(BV: purchased
a ball valve is also needed on this side.)
separately)
Indoor unit (1)
(When not using ball valve)
(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 1.3 ft. of the distribution joint.)
(Consult with SANYO separately concerning the ball
valve.)
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
tubing to the malfunctioning unit will accumulate
and may damage the compressor.)
Main tubing
Horizontal
Indoor unit (Each unit is connected to
tubing that is either level
or is directed downward.)
Branch tubing is
directed upward.
More than
8 in.
Indoor unit is directed downward
13
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Page 14
1-12. Optional Distribution Joint Kit
See the installation instructions packaged with the distribution joint kit for the installation procedure.
Table 1-17
Model name
Cooling capacity after distribution
Remarks
APR-P160BA
76,400 BTU/h (22.4 kW) or less
For indoor unit
APR-P160BA
Use: For indoor unit (Capacity after distribution joint is 76,400 BTU/h (22.4 kW) or less.)
Example
Gas tube
Liquid tube
4-21/64
4-21/64
3-13/16
3-13/16
B
A
B
B
D
A
C
D
E
Insulation
DE
C
Distribution
Joint
C
Insulation
C
2-53/64
2-53/64
Distribution
Joint
B
Unit: in.
Table 1-18 Size of connection point on each part (Shown are inside diameters of tubing)
Size
Part A
Part B
Part C
Part D
Part E
in. (mm)
ø3/4"
(ø19.05)
ø5/8"
(ø15.88)
ø1/2"
(ø12.7)
ø3/8"
(ø9.52)
ø1/4"
(ø6.35)
14
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Page 15
1-13. Example of Tubing Size Selection and Refrigerant Charge Amount
Additional refrigerant charging
Based on the values in Tables 1-2, 1-3, 1-4 and 1-7, use the liquid tubing size and length, and calculate the amount
of additional refrigerant charge using the formula below.
Required additional
refrigerant charge (oz) = 0.602 × (a) + 0.279 × (b)
(a): Liquid tubing
Total length of ø3/8" (ft.)
(b): 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.)
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.
1 Tightening torque: 590 – 710 lbs · in.
Tightening torque for valve stem cap: 160 – 180 lbs · in. 4
Tightening torque: 300 – 360 lbs · in. 3
CAUTION
2 Tightening torque for valve stem cap: 240 – 280 lbs · in.
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.
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.
15
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Page 16
Example:
L1
L2
LA
LB
Main tube of unit
LC
LN
n
1st branch
Unit distribution tube
2
1
3
model 1852
n–1
model 0752 model 0952 model 1252 model 1852
Example of each tubing length
Main tubing
Distribution joint tubing
LA = 131 ft.
Indoor side
LB = 16 ft.
1 = 16 ft.
4 = 20 ft.
LC = 16 ft.
2 = 16 ft.
5 = 16 ft.
LD = 49 ft.
3 = 7 ft.
Obtain charge amount for each tubing size
Note that the charge amounts per 3.3 ft. are different for each liquid tubing size.
ø3/8" (ø9.52) → LA + LB + LC + LD
: 212 ft. × 0.602 oz/ft. = 127 oz
ø1/4" (ø6.35) → 1 + 2 + 3 + 4 + 5 : 75 ft. × 0.279 oz/ft. = 20 oz
Total
147 oz
Additional refrigerant charge amount is 147 oz.
CAUTION
Be sure to check the limit
density for the room in which
the indoor unit is installed.
Checking of limit density
ft.3
4000
Min. indoor volume
3000
2500
341
284
227
1500
Range above
the density limit of
0.3 oz/ft.3
(countermeasures
needed)
1000
0
0
ft.3)
398
2000
500
Overall refrigerant charge amount for the air conditioner: oz
(Minimum room volume for indoor unit:
Range below
the density limit of
0.3 oz/ft.3
(countermeasures
not needed)
3500
<Determination by calculation>
ft.2
454
200
400
600
Therefore, openings such as louvers are required for this
room.
16
114
57
0
800 1000 1200
Total amount of refrigerant
= 147 (oz) + 123 (oz) = 0.38 (oz/ft.3) > 0.3 (oz/ft.3)
704 (ft.3)
170
oz
Min. indoor floor area
(when the ceiling is 8.8 ft. high)
Density limit is determined on the basis of the size of a
room using an indoor unit of minimum capacity. For
instance, when an indoor unit is used in a room (floor area
80 ft2 × ceiling height 8.8 ft. = room volume 704 ft.3), the
graph at right shows that the minimum room volume
should be 497 ft.3 (floor area 56 ft.2) for refrigerant of 147
oz. Accordingly, openings such as louvers are required for
this room.
07-056 Mini_ECOi_II_NA
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Page 17
2. SELECTING THE INSTALLATION SITE
Ceiling-Mounted Type
2-1. Indoor Unit
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.
Wall
min. 10 in.
NOTE
The rear of the indoor unit can be installed flush
against the wall.
Air
discharge
Side view
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 1-16.
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. 3 ft.
select an appropriate position from which every
corner of the room can be uniformly cooled.
Air intake
min. 2 ft.
DO:
min. 10 in.
Front view
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.
Air
discharge
min. 2 in.
Air
intake
min. 2 in.
Wall
Obstacle
Side view
Fig. 2-3
NOTE
Wall-Mounted Type
Air delivery will be degraded if the distance from the
floor to the ceiling is greater than 10 ft.
min.
6 in.
min. 6 in.
Front View
Fig. 2-4
17
min.
6 in.
Wall
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Page 18
2-2. Outdoor Unit
Exhaust fan
AVOID:
heat sources, exhaust fans, etc. (Fig. 2-5)
damp, humid or uneven locations
Hot air
Heat source
Outdoor
unit
DO:
choose a place as cool as possible.
choose a place that is well ventilated and outside
air temperature does not exceed maximum 113°F
constantly.
allow enough room around the unit for air intake/
exhaust and possible maintenance. (Fig. 2-6)
use lug bolts or equal to bolt down unit, reducing
vibration and noise.
Fig. 2-5
Installation space
Distance between obstructions and the unit air inlet
and outlet must be as shown below.
(Obstruction above unit)
Air direction chamber
(field supply)
*3
Inlet side C
More than 25/64"
B
More than 25/64"
A
*2
*4
Outlet side
More than
3.3 ft.
Inlet side
More than 8 in.
*1
(Obstruction on
inlet side)
*1
Fig. 2-6
(Ground)
Fig. 2-7
CAUTION
Concerning inlet-side distance “C” (Fig. 2-6)
The minimum for distance “C” is 6 in. if there are no obstructions on the outlet side
(wall *1 side) and *2 or *4 is not present. In all other cases, the minimum for distance
“C” is 8 in.
If the unit is installed with the outlet side facing wall *1, then there must be no obstructions on 2 of the remaining 3 sides: *2, *3, *4.
If wall *1 is on the outlet side (Fig. 2-6), or if obstructions are present on all 3 sides *2,
*3, and *4 (Fig. 2-6), then the minimum distance for “A” and “B” is 6.6 ft. (Fig. 2-8).
Even if there is no wall on the outlet side, a minimum of 3.3 ft. is required.
In case of multiple installations
provide a solid base (concrete block, 4 × 16 in.
beams or equal), a minimum of 6 in. above ground
level to reduce humidity and protect the unit against
possible water damage and decreased service life.
(Fig. 2-8)
use lug bolts or equal to bolt down unit, reducing
vibration and noise.
Anchor bolts
(4 pieces)
Fig. 2-8
18
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Page 19
2-3. Air Discharge Chamber for Top Discharge
Be sure to install an air discharge chamber (field supply) in the field when:
it is difficult to keep a space of min. 20 in. between
the air discharge outlet and an obstacle.
the air discharge outlet is facing a sidewalk and
discharged hot air may annoy passers-by.
Refer to Fig. 2-10.
Air discharge
2-4. Installing the Unit in Heavy Snow Areas
In locations with strong wind, snow-proof ducting
(field supply) should be fitted and direct exposure to
the wind should be avoided as much as possible.
Fig. 2-10
Countermeasures against snow and wind
In regions with snow and strong wind, the following
problems may occur when the outdoor unit is not provided with a platform and snow-proof ducting:
In regions with significant snowfall, the outdoor unit should
be provided with a platform and snow-proof ducting.
a) The outdoor fan may not run and damage to the
unit may occur.
b) There may be no air flow.
c) The tubing may freeze and burst.
d) The condenser pressure may drop because of
strong wind, and the indoor unit may freeze.
2-5. Precautions for Installation in Heavy Snow
Areas
(1) The platform should be higher than the max. snow
depth. (Fig. 2-11)
Without snowproof ducting
(Low platform)
(2) The 2 anchoring feet of the outdoor unit should be
used for the platform, and the platform should be
installed beneath the air intake side of outdoor
unit.
With snowproof ducting
(High platform)
Fig. 2-11
(3) The platform foundation must be firm and the unit
must be secured with anchor bolts.
Outdoor
Unit
(4) In case of installation on a roof subject to strong
wind, countermeasures must be taken to prevent
the unit from being blown over.
Duct
Air
Intake
Fig. 2-12
19
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Page 20
Unit front, air discharge chamber
2
Unit left side, air discharge chamber
3
Unit light side, air discharge chamber
4
Reinforcement brackets, 4 locations
9-7/16
3
4
1
21-5/32
42-29/32
39-1/4
12-7/32
2-3/4
Rectangular
hole
9-27/32
12-15/32
Rectangular
hole
22-13/32
21-13/32
1
2-3/4
Rectangular
hole
9-27/32
21-5/32
Rectangular
hole
1-1/8
1-3/8
9-7/16
9-27/32
1-1/8
1-3/8
2
12-15/32
1
11-13/16
2-6. Dimensions of Air-Discharge Chamber
Reference diagram for air-discharge chamber (field supply)
CHX03652/06052
Unit: in.
1
13/32
14-31/32
13-3/8
Win
dire d
ctio
n
11-13/16
1/2
21-13/32
11-13/16
4-1/4
2-11/36
37
Wind direction
Wind
direction
Wind direction
48-7/16
39-1/4
Wind
direction
15-15/16
4-5/16
19/32
25-31/32
Wind direction
1/2
1/2
25/32
6-11/16
25/32
2-7. Dimensions of Outdoor Unit with Air-Discharge Chamber (field supply)
CHX03652/06052
Wind
direction
23/32
Wind
direction
Unit: in.
20
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Reference for air-discharge chamber (field supply)
Required space around outdoor unit
CHX03652/06052
If an air discharge chamber is used, the space shown below must be secured around the outdoor unit.
If the unit is used without the required space, a protective device may activate, preventing the unit from operating.
Min. 7-7/8
Min. 39-3/8
(1) Single-unit installation
Unit: in.
CAUTION
The top and both sides must remain open.
If there are obstacles to the front and rear of the outdoor unit,
the obstacle at either the front or rear must be no taller than the
height of the outdoor unit.
(2) Multiple-unit installation
More than 11-13/16
More than 11-13/16
More than 7-7/8
CAUTION
More than 15-3/4
Installation in lateral rows
Unit: in.
The front and top must remain open.
The obstacles must be no taller than the height of the outdoor unit.
Installation in front-rear rows
Installation with intakes facing
intakes or outlets facing outlets
Installation with intakes facing outlets
More than 15-3/4
More than 78-3/4
More than 59-1/16
Unit: in.
CAUTION
The front and both sides must remain open.
21
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2-8. Dimensions of Snow Ducting
Reference diagram for snow-proof ducting (field supply)
CHX03652/06052
Fastened by screws at 13 locations
30-3/32
1
Unit top, snow-proof vent
2
Unit left side
3
Unit right side
4
Unit reverse side
4
Unit: in.
1
25-13/32
3
11-7/8
17-15/32
9-3/16
28-13/16
Fastened by screw at
1 location (also on reverse side)
ole
rh
cho hole)
n
a
2
it
Un ø9/3
–
(7
1-5/8
15-9/32
47-19/32
19-11/16
19-11/16
47-19/32
Fastened by screws at
3 locations (also on reverse side)
5/8
1-3/16
28-3/4
30-5/8
2-9. Dimensions of Outdoor Unit with Snow-Proof Ducting (field supply)
CHX03652/06052
15-15/16
Unit: in.
19/32
25/32
Wind direction
25/32
14-31/32
25-13/32
13/32
30-3/32
7-1/16
Wind direction Wind direction
Wind direction
37
11-29/32
48-7/16
47-19/32
28-13/16
24-7/8
Wind direction
Wind direction
22
2
3-31/32
13-5/16
25/32
19-11/16
17-23/32
28-13/16
9-3/16
5-29/32
3-3/4
07-056 Mini_ECOi_II_NA
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Page 23
Reference diagram for snow-proof ducting – 1
Space requirements for setting – (1)
CHX03652/06052
[Obstacle to the front of unit]
[Obstacle to the rear of unit]
Top is open:
Top is open:
(1) Single-unit installation
Min. D
Min. A
Min. H
(1) Single-unit installation (2) Obstacles on both sides
Min. B
(2) Multiple-unit installation (2 or more units)
Min. C
Min. I
Min. G
Min. I
Min. J
(3) Multiple-unit installation (2 or more units)
H
Outdoor unit
Min. E
Min. E
I
J
CHX03652/06052 19-11/16 11-13/16 39-3/8
Min. E
Min. F
Outdoor unit
CHX03652/06052
A
B
C
5-29/32 5-29/32 11-13/16
D
E
F
7-7/8 11-13/16 5-29/32
G
7-7/8
Top is blocked by an obstacle:
Note: In cases 2 and 3 the height of the obstacle
must be no taller than the height of the outdoor
unit.
Min. N
Top is blocked by an obstacle:
Min. M
Min. K
Min. L
Outdoor unit
K
Outdoor unit
M
N
CHX03652/06052
39-3/8
39-3/8
L
CHX03652/06052 19-11/16 5-29/32
Unit: in.
23
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Page 24
Reference diagram for snow-proof ducting – 2
Space requirements for setting – (2)
CHX03652/06052
[Obstacles to the front and rear of unit]
The top and both sides must remain open. Either the obstacle to the front or
the obstacle to the rear must be no taller than the height of the outdoor unit.
Q
Min. O
Min. P
(1) Single-unit installation
Dimension Q
If a snow protection duct is attached after the unit is
installed, verify that dimension Q is 19-11/16 in. or more.
O
Outdoor unit
CHX03652/06052
P
39-3/8 5-29/32
Min. 11-13/16
Q
Min. 7-7/8
Min. 11-13/16
Min. 39-3/8
(2) Obstacles on both sides
[Installation in front-rear rows]
The top and both sides must remain open. Either the obstacle to the front or the obstacle
to the rear must be no taller than the height of the outdoor unit.
0
Min. 11-13/16
Min. 39-3/8
Min. 59-1/16
Min. 78-3/4
Min. 7-7/8
Dimension Q
If a snow protection duct is
attached after the unit is
installed, verify that dimension
Q is 19-11/16 in. or more.
Unit: in.
24
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3. HOW TO INSTALL THE INDOOR UNIT
4-Way Air Discharge Semi-Concealed Type (X Type)
Note: For DC Fan Tap Change Procedure
for 4-Way Cassette, see page 31.
3-1. Preparation for Suspending
This unit uses a drain pump. Use a carpenter’s level to check that the
unit is level.
Hole-in-anchor
Hole-in-plug
Concrete
X
Insert
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.
Table 3-1
12, 18, 24, 36
A
B
C
D
31-1/32
(788)
28-15/32
(723)
34-27/32
(885)
34-27/32
(885)
(3) Determine the pitch of the suspension bolts using the supplied fullscale 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.
Unit: in. (mm)
Table 3-2
Length
A
B
C
D
E
12, 18, 24
4-29/64
(113)
6-13/16
(173)
10-5/64
(256)
8-17/64
(210)
3-15/32
(88)
36
4-29/64
(113)
6-13/16
(173)
12-9/16
(319)
8-17/64
(210)
3-15/32
(88)
Type
Drain outlet(other side)
(VP25)
D (ceiling opening dimension)
Length
Fig. 3-1
Unit: in. (mm)
B (suspension bolt pitch)
Type
Suspension bolt (M10 or 3/8")
(field supply)
A (suspension bolt pitch)
C (ceiling opening dimension)
Fig. 3-2
Refregerant tubing joint(liquid side)
Refregerant tubing joint(gas side)
Power supply outlet
Inter-unit control wiring
(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.
Supplied bolt
Full-scale installation diagram
(printed on top of container box)
Fig. 3-4
25
Unit: in. (mm)
15/32 – 43/64
(12 – 17)
Over 19/32 (15)
Fig. 3-3
3-3. Placing the Unit Inside the Ceiling
1-3/8 (35)
E
A
B
D
C
Suspension lug
Unit: in. (mm)
07-056 Mini_ECOi_II_NA
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Page 26
(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.
X
Suspension bolt
Suspension lug
Nuts and washers
(use for upper and lower)
(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.
Notch
Double nut
15/32 – 43/64 (12 – 17)
(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.
Unit: in.
Fig. 3-5
(5) Remove the protective polyethylene used to protect
the fan parts during transport.
Hard PVC
socket
Hard PVC pipe
Hose band
VP-25
VP-25
Supplied
Connection pipe
(Field
supply)
(Field supply)
drain hose
(drain port)
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)
Packing
(supplied)
Align the hose
band with the end
of the pipe
CAUTION
Bead
Fig. 3-6
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)
CAUTION
PVC adhesive
Drain insulator (supplied)
Fig. 3-7
Air bleeder prohibited
Tighten the hose clamps so
their locking nuts face upward.
(Fig. 3-6)
Fig. 3-8
(2) After checking the drainage, wrap the supplied packing
and drain pipe insulator around the pipe. (Fig. 3-7)
CAUTION
NOTE
Do not install an air bleeder
as this may cause water to
spray from the drain pipe
outlet. (Fig. 3-8)
Make sure the drain pipe has a downward gradient (1/100
or more) and that there are no water traps.
26
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Page 27
CAUTION
11-3/16 in. or less (as short as possible)
33-15/32 in. or less
In cases where it is necessary to raise the height
0 – 45°
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.
X
* Length of supplied drain hose = 9-27/32 in.
Fig. 3-9
Upward gradient prohibited
Fig. 3-10
Support
pieces
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.
Fig. 3-11
Drainage check
(1) Connect power to the power terminal board (R, S
terminals) inside the electrical component box.
Over 3-15/16 in.
(2) Slowly pour about 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.
Drain pan outlet
Plastic container
for water intake
(4) When the check of drainage is complete, open the
check pin (CHK) and remount the tube cover.
CAUTION
Water (Approx. 0.3 gal)
Fig. 3-12
Be careful since the fan will
start when you short the pin
on the indoor control board.
27
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3-6. How to Install the Ceiling Panel
A must be within the range of 15/32 – 43/64 in.
3-6-1. Before Installing the Ceiling Panel
If not within this range, malfunction or other trouble may result.
Checking the unit position
X
(1) Check that the ceiling hole is within this range:
33-55/64 × 33-55/64 to 35-53/64 × 35-53/64 in.
Main unit
(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 result.
A
Ceiling opening
dimension
Ceiling side
Fig. 3-13
Flap
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.)
Fig. 3-14
Remove the air-intake grille and air filter from the
ceiling panel. (Figs. 3-16, 3-17 and 3-18)
Latch
Screw
a) Remove the 2 screws on the latch of the air-intake
grille. (Fig. 3-16)
b) Slide the air-intake grille catches in the direction
shown by the arrows 1 to open the grille.
(Fig. 3-17)
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 2 . (Fig. 3-18)
Fig. 3-15
Air-intake grille
Removing the corner cover
Ceiling panel
1
1
a) Slide the corner cover to the direction shown
by the arrow 1 to remove the corner cover.
(Fig. 3-18).
2
Air-intake grille hinge
Fig. 3-16
Fig. 3-17
Ceiling panel
Corner cover
1
Push
Strap
Corner cover
Fig. 3-18
28
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Page 29
Inter-unit control wiring
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)
X
Screw (supplied)
Wiring cover (supplied)
M4-8 or 5/32" – 5/16"
Fig. 3-19-1
Fig. 3-19-2
Square hole in unit
Push when
you remove
Temporary
fastener
Temporary
fastener
Fig. 3-20-1
Drain tubing corner
(2) Align the panel installation holes and the unit
screw holes.
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 ceiling,
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)
DRAIN mark
Washer head
screws
Ceiling surface
surface and the ceiling panel even
after the screws are tightened,
adjust the height of the unit again.
Air leakage
Air leakage from
ceiling surface
Staining
Condensation, water leakage
Adjust so that there are no gaps.
Fig. 3-23
29
Fig. 3-20-2
Insert a wrench
or other tool into
the corner cover
installation hole
and make fine
adjustments to
the unit nut.
Ceiling panel
Fig. 3-21
If a gap remains between the ceiling
REF,PIPE Panel installation hole
(4 locations)
mark
Do not allow
gaps
CAUTION
ened, trouble such as that shown in
the figure below may occur. Be sure
to tighten the screws securely.
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.
Celling panel
Main unit
If the screws are not sufficiently tight-
Power supply outlet
Fig. 3-22
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.
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Page 30
3-6-3. Wiring the Ceiling Panel
(Direction that the unit faces has been changed to
facilitate explanation.)
(1) Open the cover of the electrical component box.
X
Electrical component
box cover
(2) Connect the 7P wiring connector (red) from the
ceiling panel to the connector in the unit electrical
component box.
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.
Screws
(3 locations)
Ceiling panel side
Ceiling panel
wiring connector
Mains side
Clamp
3-6-4. How to Attach the Corner & Air-Intake Grille
* Pass the wiring connector through the clamp to fasten it in place,
as shown in the figure.
Attaching the corner cover and air-intake grille
Fig. 3-24
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.
Pin
(2) Use the supplied screws to attach the corner cover
to the ceiling panel.
B. Attaching the air-intake grille
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.
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.
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.
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.
Fig. 3-25
Hole for ceiling panel hook
Hook that prevents
the grille from dropping
Fig. 3-26
Unit drain hose side
Unit refrigerant tube side
Optional wireless receiver kit
* Can only be installed
in this position.
Can be installed rotated 90˚
Unit electrical component box
Fig. 3-27
30
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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
<Steps> 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.)
Setting
Air shield material (for use with 3-direction discharge)*
(a)
Air shield material (for use when a discharge duct is connected)*
(b)
Air shield material (for use with 2-direction discharge)*
* Use field-supply air shield material.
Setting (a): Go to (2).
Setting (b): Go to (3).
(2) Setting (a)
Open the cover of the electrical component box.
Short the short-circuit pin TP3 (2P, yellow) on the
indoor unit control PCB.
Indoor unit control PCB
* PCB model No.: CR-SXRP56B-B
(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
31
X
Page 32
1-Way Air Discharge Semi-Concealed Type (A Type)
3-8. Suspending the Indoor Unit
1-27/64
29-59/64 (Panel outer dimensions)
28-47/64 (Ceiling opening dimension)
25-63/64 (Suspension bolt pitch) (1-27/64)
3-47/64
22-3/64
23-5/8
Fig. 3-29
Drain pipe connection
(Be sure to connect the supplied flexible hose.)
10-1/32
(3) Calculate the suspension bolt pitch using the fullsize installation diagram (printed on the package).
The relationship between the positions of the
suspension lugs, unit, and ceiling panel is as
shown in Fig. 3-30.
5-19/64
Flared refrigerant
connection outlet
(liquid tube)
22-3/64
1-19/64
1-49/64
Flared refrigerant
connection outlet
(gas tube)
12-19/64
1-3/16
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.
2-9/16
1-49/64
WARNING
9-29/64
3-3/16
2-31/64
A
(2) Depending on the ceiling type:
Insert suspension bolts as shown in Fig. 3-31
or
Use existing ceiling supports or construct a suitable
support as shown in Fig. 3-32.
Make sure that the length of suspension bolts from the
bottom of the unit is 19/32 in. or more. (Fig. 3-33)
15-3/4 (Suspension bolt pitch)
(1) Follow the diagrams to make the holes in the ceiling.
(Figs. 3-29 and 3-30)
Unit: in.
19/32
2:40 PM
24-13/32 (Outline dimension of panel)
3/19/07
19/32 23-15/64 (Ceiling opening dimension)
07-056 Mini_ECOi_II_NA
Inter-unit
Control Wiring
Power supply outlet
Unit: in.
(4) Cut the ceiling material, if necessary.
(Figs. 3-29 and 3-30)
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. 3-34 and
3-35.
Fig. 3-30
Hole-in-anchor
Hole-in-plug
Concrete
Suspension bolt
(M10 or 3/8")
CAUTION
Fig. 3-31
When making the cuts to the insulation, be careful
not to damage the drain pan.
32
Insert
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Page 33
3-9. Placing the Unit Inside the Ceiling
Ceiling tiles
Ceiling support
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. 3-32
A
Full-scale
installation diagram
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.
Suspension
lug
over 19/32 in.
25/32 – 1 in.
(2) Attach the special washers (supplied) and nuts (field
supply) to the suspension bolts (4 locations).
Fig. 3-33
CAUTION
For fresh air intake
(ø3-15/16 hole) A
Use M10 or 3/8" nuts.
3-5/32
The length of the suspension bolts must be such that
6-11/16
there is a space of at least 19/32 in. below the bottom
of the suspension lugs, as shown in Fig. 3-33. If the
length of the suspension bolts is too long, the bolts
may interfere with the ceiling panel and louver motor,
preventing their installation.
Unit: in.
Fig. 3-34
(3) Thread the 3 hexagonal nuts and 2 washers (field
supply) onto each of the 4 suspension bolts as
shown in Fig. 3-36. 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.
6-11/16
8-1/16
(4) Lift up the indoor unit and fit the suspension bolts
into the notches in the suspension lugs.
For fresh air intake
(ø3-15/16 hole) A
(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.
Unit: in.
Fig. 3-35
Suspension bolt
Nuts and washers
(Used above and below.)
Suspension lug
Double nuts
over 19/32 in.
Notch
25/32 – 1 in.
Fig. 3-36
33
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Page 34
19/32
07-056 Mini_ECOi_II_NA
CAUTION
2-1/8
2-1/8
The indoor unit includes a drain pump. Be sure to
Suspension bolts
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
(6) The distance between the unit and the opening of
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. 3-37 and 3-38.
Unit: in.
Suspension bolts
Fig. 3-37
Ceiling
material
(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. 3-39)
25/32
3-10. Installing the Drain Piping
25/32
25/32
A
Tubing side
Fig. 3-38
Align the hose band with end of the
hose, and tighten so that it does not
contact the bead.
CAUTION
Drainage check
section on drain port
(transparent)
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. 3-39)
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).
Drain hose
(supplied)
Bead
Hard PVC
pipe
Hard PVC
socket VP-25 VP-25
(not supplied) (not supplied)
PVC adhesive
Packing (supplied)
Fig. 3-39
Drain insulator (supplied)
(2) After checking the drainage, wrap the supplied
packing and drain pipe insulator around the pipe,
then secure it with the supplied clamps. (Fig. 3-40)
Fig. 3-40
NOTE
Make sure the drain pipe has a downward gradient
(1/100 or more) and that there are no water traps.
34
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Page 35
CAUTION
Do not install an air bleeder as this may cause water
to spray from the drain pipe outlet. (Fig. 3-41)
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. 3-42)
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. 3-43)
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. 3-44)
Provide insulation for any pipes that are run indoors.
Air bleed valve
Fig. 3-41
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. 3-42
Uphill slope
Fig. 3-43
3-11. Checking the Drainage
Support
bracket
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.
Fig. 3-44
(2) Pour about 0.2 gal of water into the drain pan using a
siphon pump through the air outlet grille. (Fig. 3-45)
Drainage check
(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.
Drain tube
connection
(transparent)
Discharge port
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.
CAUTION
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.
35
water (0.2 gal)
Fig. 3-45
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Page 36
Refrigerant tubing joint
(gas tube)
3-12. Electrical Power Wiring
(1) Wiring connections
Drain pipe connection
(Be sure to connect the
supplied flexible hose.)
Refrigerant tubing joint
(liquid tube)
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. 3-46)
Inter-unit Control Wiring
Power supply outlet
(2) Wiring
WARNING
Fig. 3-46
Route the power wiring into the indoor unit through the power inlet on the side of the unit. At this time, be
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.
3-13. How to Install the Ceiling Panel
Component Parts
Ceiling panel
Quantity
Appearance
Part name
Quantity
Washer-head
screw
4
Screw
2
Appearance
ø1
1/1
6"
Part name
M5 × 40
or
5/16" × 9/16"
1
4 × 12 or 5/32" × 15/32"
For fastening
side panel
3-13-1. Before Installing the Ceiling Panel
Checking the position of the indoor unit
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.
(1) Check that the dimensions of the ceiling opening are
the following:
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. 3-47. 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.
(Doing so may damage the flap.)
25/32 – 1 in.
A
Indoor unit
Ceiling opening dimension
Ceiling surface
Fig. 3-47
Flap
Fig. 3-48
36
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Removing the intake grille
Screw
Slide the intake grille hooks (2 locations)
in the direction of the arrow to open the
intake grille. (fig. 3-49a)
de
Sli
When the intake grille is open, press a
flathead screwdriver against the rear
tabs (2 locations) and pull out the intake
grille. (Fig. 3-49b)
Screw
Hook
Fig. 3-49a
A
Intake grille
Removing the side panel
Grasp the finger grip on the side panel
and slide the panel in the direction of
arrow 1 to remove the panel.
(There are 2 panels: 1 each on the left
and right sides.) (Fig. 3-51)
Hinge
Fig. 3-49b
Press on the tabs with a flathead (minus)
screwdriver while pulling out the intake grille.
Tab
1
Fig. 3-50
Slide
Side panel
Fig. 3-51
3-13-2. Installing the ceiling panel
Hook receiver
(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. 3-52)
Press to remove.
Stationary hook
(2) Angle the panel somewhat and fasten the stationary
hook into the fastener on the side of the unit.
Moveable hook
Fig. 3-53
(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. 3-53)
37
Moveable hook
Fig. 3-52
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(5) Align the installation holes on the panel with the
bolt holes on the unit.
Indoor 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. 3-54)
(7) Verify that the panel is securely fastened against
the unit.
A
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. 3-55)
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. 3-56)
Ceiling panel
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.
Washer-head screw
Fig. 3-54
Must be no gap.
Insert a wrench or other
standard tool into the side
panel installation holes
and make fine adjustments
to the indoor unit nuts.
Indoor unit
Ceiling surface
Ceiling panel
Fig. 3-55
Fig. 3-56
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
• 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. 3-56)
Ceiling panel
air leakage
Stains
Adjust so that there is no gap.
Condensation and water leakage
38
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3-13-3. Wiring the ceiling panel
(1) Loosen the 2 screws on the electrical component
box lid, and remove the lid. (Fig. 3-57)
(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. 3-58)
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.
Screw
Electrical compornent
box cover
Fig. 3-57
3-13-4. 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. 3-59)
(2) Fasten the side panel onto the ceiling panel using
the supplied screws (4 × 12 or 5/32" × 15/32").
Inter-unit control wiring
Electrical compornent box
Power supply outlet
Indoor unit connector
B. Installing the intake grille
To install the intake grille, follow the procedure for
removing it in the reverse order. (Fig. 3-60)
When installing the intake grille, be careful that the
flap lead wire does not become pinched. (Fig. 3-60)
Fig. 3-58
Fasten with screws
(4 × 12 or 5/32" × 15/32")
Tabs
Tab
3-13-5. Other
Slide
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 condensation 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.
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 × 12 or 5/32" × 15/32").
Fig. 3-59
Screw
Screw
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.
39
Fig. 3-60
A
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3-14. 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. 3-61 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. 3-62 and Table 3-4 show the detailed dimensions of the indoor
unit.
Table 3-3
A (Suspension bolt pitch)
Inspection
access
22-27/32
min.
9-27/32
Electrical
component box
Indoor unit
17-23/32
17-23/32
Refrigerant
tubing
min.
15-3/4
min. 25-19/32
Air outlet duct flange
Unit: in.
Fig. 3-61
Unit: in. (mm)
7, 12, 18
Type
A (Length)
24
36
30-23/32 (780) 42-17/32 (1,080) 61-13/32 (1,560)
Number of duct flanges
2
3
4
Table 3-4
D
35-7/16
(7-3/32 × 5) 39-3/8
54-11/32
56-25/32 (9-1/16 × 6) 58-9/32
E
F
G
H
J
K
30-23/32 11-13/32 10-5/16 26-25/32 28-5/32
7-3/32
–
13-3/8
42-17/32 11-13/32 10-23/32 38-19/32 39-31/32
5-1/8
61-13/32 13-3/16
5-1/8
12-7/32 57-15/32 58-27/32
K
A (O.D.)
J
11
I
3/4
H (Duct suspension bolt pitch)
G (Ceiling opening dimension)
4-ø15/32
(Hole)
1-7/32
B
18-ø1/8
(Hole)
31/32
13/32
12-7/32
31/32
8-9/32
31/32
6-7/8
C
D
(Suspension bolt pitch)
E
E
1-9/16
(5-29/32)
E
F
2-15/16
2-9/16
31/32
2-3/4
17-23/32)
(Field supply)
9
7-15/32
Inspection access
(17-23/32
24-13/16
1-3/16
6-5/16
10
3-11/32
1-7/32
J
4-17/32
3-17/32
L-ø1/4
(Hole)
I
9-21/32
(9-21/32 × 1) 9-27/32
19-9/32
(9-21/32 × 2) 9-7/16
2-3/4
1-3/8
5-1/8
11-7/32
Inspection access panel
Ceiling
Unit: in.
Fig. 3-62
40
L
M
8
12
12
16
16
18
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
13/32
13/32
3/4
No. of holes
I
2-5/32
13/32
10-1/4
(O.D.)
7-7/8
13/32
36
C
37-7/8
31/32
24
B
23-5/8
26-1/16 (7-7/8 × 3) 27-9/16
2-5/32
7, 12, 18
A
(Ceiling opening dimension)
10-13/16
3-15/16
3-15/32
Type
Unit: in.
(Suspension bolt pitch)
31/32
22-27/32
Dimension
7-9/32
U
min.
9-27/32
Concealed Duct Type (U Type)
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3-15. Suspending the Indoor Unit
Depending on the ceiling type:
Hole-in-anchor
Hole-in-plug
Concrete
Insert
• Insert suspension bolts as shown in Fig. 3-63
or
• Use existing ceiling supports or construct a suitable support as
shown in Fig. 3-64.
Suspension bolt (M10 or 3/8")
(field supply)
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.
Fig. 3-63
Ceiling tiles
Ceiling support
U
(1) When placing the unit inside the ceiling, determine the pitch of
the suspension bolts referring to the dimensional data on the
previous page. (Fig. 3-61 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.
Fig. 3-64
Suspension bolt
(2) Screw in the suspension bolts allowing them to protrude from
the ceiling as shown in Fig. 3-63. (Cut the ceiling material, if
necessary.)
Suspension lug
Nuts and washers
(use for upper and lower)
(3) Thread the 3 hexagonal nuts and 2 washers (field supply) onto
each of the 4 suspension bolts as shown in Figs. 3-65 and 3-66.
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.
Notch
Double nuts
Fig. 3-65
Suspension bolt
Hexagonal nut
Fig. 3-67 shows an example of installation.
Double nuts
Bolt anchor
Air outlet duct
Suspension bolt
Air-intake duct
Air-outlet grille
Ceiling material
Indoor unit
Air-intake grille
Fig. 3-67
41
Fig. 3-66
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3-16. Installing the Drain Piping
(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. 3-68)
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
pipe
Hard PVC
socket VP-25 VP-25
(not supplied) (not supplied)
CAUTION
Do not use adhesive at the drain connection port on the
U
Bead
PVC adhesive
Packing (supplied)
Fig. 3-68
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.
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. 3-68)
Drain insulator (supplied)
Vinyl clamps
(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. 3-69)
Fig. 3-69
Air bleeder
NOTE
Make sure the drain pipe has a downward gradient (1/100 or more)
and that there are no water traps.
CAUTION
Prohibited
Fig. 3-70
Do not install an air bleeder as this may
cause water to spray from the drain pipe
outlet. (Fig. 3-70)
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. 3-71)
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. 3-72)
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. 3-73)
11-13/16" or less
Good
19-11/16" or less
Fig. 3-71
Upward gradient
Prohibited
Fig. 3-72
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.
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
about 0.3 gal of water into the drain pan to check drainage.
(3) Short the check pin (CHK) on the indoor control board and operate the drain pump. Check the water flow through the transparent
drain port and see if there is any leakage.
42
Fig. 3-73
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Power supply outlet
Be careful since the fan will start when you
short the pin on the indoor control board.
Inter-unit control wiring
(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.
3-18. Increasing the Fan Speed
If external static pressure is too great (due to long extension of ducts, for
example), the air flow volume may drop too low at each air outlet. This problem
may be solved by increasing the fan speed using the following procedure:
(1) Remove 4 screws on the electrical component box and
remove the cover plate.
(2) Disconnect the fan motor sockets in the box.
Indoor Fan Performance
Booster cable
HT
0.20
H
e
it lin
it l
ine
Lim
0.40
Lim
Booster cable
18 Type
(in.WG)
0.60
Lim
it lin
e
it li
ne
Electrical component box
0.40
Lim
External Static Pressure
(5) Place the cable neatly in the box and reinstall the cover
plate.
Fan motor socket
(At shipment)
7, 12 Type
(in.WG)
0.60
External Static Pressure
(4) Securely connect the booster cable sockets between the
disconnected fan motor sockets in step 2 as shown in
Fig. 3-75.
Fan
motor
U
Fig. 3-74
(3) Take out the booster cable (sockets at both ends)
clamped in the box.
0.20
HT
H
M
M
L
L
(Booster cable installed)
0
177
Fig. 3-75
0
353
353
Air Flow (CFM)
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.
530
Air Flow (CFM)
36 Type
(in.WG)
H
0.20
M
it li
ne
0.40
HT
Lim
HT
External Static Pressure
Limit
it lin
e
0.40
Lim
External Static Pressure
line
0.60
Lim
(in.WG)
0.60
it lin
e
24 Type
H
0.20
M
L
L
0
0
353
706
706
Air Flow (CFM)
NOTE
HT: Using the booster cable
H: At shipment
Fig. 3-76
43
1059
Air Flow (CFM)
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Concealed Duct High-Static Pressure Type (D Type)
3-19. 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. 3-77.
It is recommended that space be provided (23-5/8" ×
23-5/8") for checking and servicing the electrical system.
Fig. 3-78 and Table 3-5 show the detailed dimensions of
the indoor unit.
19-11/16
11-27/64
5-1/8
Min. 23-5/8
(Space for service)
37
Suspension
bolt pitch
38-37/64
Suspension
bolt pitch
Air suction side
Refrigerant tubing
Electrical
component
box
Inspection access
(23-5/8" × 23-5/8")
Min. 23-5/8
Space for
service
D
Min. 22-53/64
Drain pan
Ceiling face
Min. 5-1/8
Unit: in.
Fig. 3-77
37
31-7/32
7 × 3-15/16 = 27-9/16
22 - ø1/8
2-5/32
(Hole for full
circumference) 1-37/64
17-23/32 16-47/64 3-55/64
16 - ø1/8
(Hole for full
circumference)
19/32
25/64
1-31/32
2-5/32
25/64
2-3/4
1-3/8
4 × 3-15/16
= 15-3/4
19-11/16
38-37/64 (Suspension bolt pitch) 19/32
39-49/64
37
1-3/8
Refrigerant liquid line (ø3/8 or ø1/4)
Refrigerant gas line (ø3/4 or ø5/8)
Power supply outlet
Drain connection (25A, O.D. 1-1/4")
Duct connection for suction
Duct connection for discharge
Inter-unit control wiring
11-13/16
B
1
2-5/32
24-13/32
19-11/16
4-ø25/32 hole for
suspension bolt
1-13/16
1-11/32
48
Electrical component box
3-15/16
C
B
16-17/32 15-35/64 2-43/64
3-55/64
11-27/64
A
36
3-5/32
Length
3-15/16
2-5/32
3-15/16
A
12-13/64
Type
Unit: in.
3-15/16
Table 3-5
(Suspension bolt pitch)
5-1/8
1-57/64
25/32
3-35/64
2-23/64
Drain pan
Unit: in.
Fig. 3-78
44
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3-20. Suspending the Indoor Unit
Depending on the ceiling type:
Insert suspension bolts as shown in Fig. 3-79
or
Use existing ceiling supports or construct a suitable support as
shown in Fig. 3-80.
Hole-in-anchor
Hole-in-plug
Concrete
Insert
Suspension bolt (M10 or 3/8")
(field supply)
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 suport the weight of the unit.
Before hanging the unit, test the strength
of each attached suspension bolt.
Fig. 3-79
Ceiling tiles
Ceiling support
(1) When placing the unit inside the ceiling, determine the pitch
of the suspension bolts referring to the dimensional data given
previously. (Figs. 3-77 and 3-78)
(2) Screw in the suspension bolts allowing them to protrude from
the ceiling as shown in Fig. 3-79. (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. 3-81.
D
Fig. 3-80
Suspension bolt
Hexagonal nuts
and washers
(2 sets)
25/32" – 1-31/32"
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.
Fig. 3-81
Air-outlet grille
Air-intake grille
Fig. 3-82
45
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3-21. Installing the Drain Piping
Sealing tape
(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.
Drain pan
(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. 3-83)
Drain joint
(supplied)
Drain opening
(25A or 1-11/32" male screw)
Fig. 3-83
(3) After connecting the drain pipe securely, wrap insulator
(field supply) around the pipe.
Downward gradient
(4) Ensure the drain pipe has a downward gradient (1/100
or more) and prepare traps as indicated in Fig. 3-84.
Min. 1/100
(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. 3-85)
(6) After connecting the drain piping, slowly pour water into
the drain pan to check that the water drains smoothly.
3-22. 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.
Not good
Min.
3-15/16 in.
Fig. 3-84
Min. 1-31/32 in.
Inspection plug
3-23. Indoor Fan Performance
Fig. 3-85
How to Read the Diagram
36 Type
(in.WG)
48 Type
(in.WG)
lin
e
1.00
it l
ine
0.80
0.40
M
0.20
Limit
H
H
L
0.60
M
M
External Static Pressure
H
Lim
0.80
Li
m
it
1.00
L
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.
External Static Pressure
D
Good
0.60
0.40
H,M
0.20
line
Limit
0
line
0
883
1059
1236
Air Flow (CFM)
NOTE
1236
Air Flow (CFM)
H: At shipment
Fig. 3-86
46
1059
1412
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Ceiling-Mounted Type (T Type)
3-24. Required Minimum Space for Installation and Service
Table 3-6
6-11/16
(1) Dimensions of suspension bolt pitch and unit
Unit: in.
C
C
Air intake
12, 18
33-21/32 35-53/64 8-17/64
24
44-19/64 46-29/64 8-17/64
26-49/64
B
12-19/32
A
(Suspension bolt pitch)
Dimension
Type
B
Ceiling side
A
1-5/64
1-5/64
Air outlet
(Suspension bolt pitch)
Unit: in.
Fig. 3-87
(2) Refrigerant tubing • drain hose position
4-9/64
Liquid
tubing
Right side
2-3/64
1-1/4
9/64
2-23/64
1-1/4
6-47/64
3-61/64
3-13/16
2-61/64
8-1/2
(Liquid tubing •
Gas tubing)
6-47/64
Rear (figure shows view from front) 2-21/64
Left side
T
9-7/8
3-5/16
Left drain position
5-3/4
1-17/32
1-17/32
Gas tubing
6-11/32
9-7/8
Right drain position
Unit: in.
Closed with rubber stopper at time of shipment.
Fig. 3-88
6-47/64
Left-side drain hose
outlet port
Inter-unit control wiring
(ø1-3/16", knock-out, use rubber grommet)
Outside air intake duct connection port
(ø3-15/16", knock-out)
Power supply outlet
(ø1-3/16", knock-out)
Rear tubing hole
3-5/16
*1
10-5/16
4-59/64
Left-side drain
hose outlet port
2-53/64
Side panel
13-21/32
Unit: in.
Side panel
*1
Right-side drain
hose outlet port
*1
4-11/64 3-11/64
Rear outlet port
3-35/64
(3) Unit opening position (Refrigerant tubing • drain hose • power inlet port • remote controller wiring inlet port)
Use a compass saw, jig saw or similar tool and cut along the indented portion of the side panel.
Fig. 3-89
47
Position of plate
inside side panel
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Page 48
Figure shows view from top
Wall
5-45/64
Ceiling
3-35/64
6-7/64
Figure shows view from front
* 3-35/64
(4) Wall and ceiling side opening position
ø3-15/16 ceiling opening
ø3-15/16 wall side opening
ø3-15/16 wall side opening
(for left-side drain hose)
5-5/16
ø3-15/16 ceiling opening
4-59/64
Unit: in.
* If the optional drain up kit is installed, create a ø3-15/16" hole along the dotted line (part marked with * in figure).
Fig. 3-90
3-25. Suspending the Indoor Unit
Ceiling
(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. 3-91).
Wall
Full-scale
installation diagram
NOTE
Since the diagram is made of paper, it may shrink or
stretch slightly because of high temperature or humidity.
For this reason, before drilling the holes maintain the
correct dimensions between the markings.
Hole-in-anchor
Hole-in-plug
Concrete
Insert
(2) Drill holes at the 4 points indicated on the full-scale
diagram.
(3) Depending on the ceiling type:
Suspension bolt (M10 or 3/8")
(field supply)
a) Insert suspension bolts as shown in Fig. 3-92.
Fig. 3-92
or
b) Use existing ceiling supports or construct a
suitable support as shown in Fig. 3-93.
Ceiling tiles
Ceiling support
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.
A
A
Fig. 3-93
Pull out the
air-intake grille
pushing claws
of the hinges
Screw
(4) Screw in the suspension bolts, allowing them to
protrude from the ceiling as shown in Figs. 3-92
and 3-93. The distance of each exposed bolt must
be of equal length within 1-15/16". (Fig. 3-94)
Hinge
Latch
de
Sli
unit
Ceiling
surface
Within
1-15/16"
T
Fig. 3-91
Air-intake grille
Fixture
Fig. 3-94
Fig. 3-95
48
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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. 3-95. Then remove
both side panels sliding them along the unit toward the front after
removing the 2 attachment screws. (Fig. 3-96)
Slide toward
front side
(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. 3-97 and 3-98)
(7) Suspend the indoor unit as follows:
a) Mount 1 washer and 2 hexagonal nuts on each suspension bolt as
shown in Fig. 3-99.
b) Lift the indoor unit, and place it on the washers through the notches,
in order to fix it in place. (Fig. 3-100)
c) Tighten the 2 hexagonal nuts on each suspension bolt to suspend
the indoor unit as shown in Fig. 3-101.
Side panel
Fig. 3-96
Suspension bolt
(field supply)
Unit
Ceiling surface
Washer (supplied)
Double nut
(field supply)
Fixture
NOTE
Fig. 3-97
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. 3-102)
Suspension bolt
(field supply)
Washer (field supply)
Unit
T
Washer (supplied)
Double nut
(field supply)
(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. 3-103)
Approx.
63/64"
Fig. 3-98
Ceiling
surface
Washer
(supplied)
Nut
(field supply)
Suspension bolt
Fig. 3-99
Fig. 3-100
NOTE
Fig. 3-101
The hole should be made at a slight downward slant to
the outside.
PVC pipe (locally purchased)
Indoor
side
INSIDE
Outdoor
side
Wall
OUTSIDE
PVC pipe
Slight
angle
Cut at slight angle
Fig. 3-103
Fig. 3-102
49
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3-26. 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. 3-104)
3-27. 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. 3-89.
* When routing the tubing out through the top, the optional
L-shape tubing kit is required.
Rear outlet port
Inter-unit control wiring
(ø1-3/16", knock-out, use rubber grommet)
Outside air intake duct connection port
(ø3-15/16", knock-out)
Power supply outlet
(ø1-3/16", knock-out)
Rear tubing hole
Left-side drain hose outlet port
Fig. 3-104
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.
T
Rear cover
Fig. 3-106
Fig. 3-105
3-28. 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.
Donward gradient
Min. 1/100
Good
(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
Not good
the drain hose all the way to the base.
Fig. 3-107
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.
CAUTION
Do not use adhesive when connecting the supplied drain hose to
the drain port (either on the main unit or the PVC pipe).
Attach so that the hose band fastener is
on the side of the drain port. (Fig. 3-108)
Wrap the hose with the supplied drain hose insulation and use the
4 twist ties so that the hose is insulated with no gaps.
Attach the hose bands so that each is
approximately 13/64 – 63/64 in. from the
Connect the drain piping so that it slopes downward from the unit
end of the supplied drain hose.
to the outside. (Fig. 3-107)
50
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Never allow traps to occur in the course of the piping.
Twist tie
(4 ties, supplied)
Insulate any piping inside the room to prevent drip-
Unit drain port
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.)
Hard PVC pipe
(equivalent to
VP-20)
(Field supply)
Drain hose
insulation
(supplied)
Position to
fasten hose
bands
Drain hose
(supplied)
13/64
63/64
Drain port
13/64
63/64
5-33/64
Screwdriver
* If the drain hose is
routed through the
left side, refer to Fig.
3-105, 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.
Hose band
(2 bands, supplied)
Unit drain pan
Fig. 3-108
CAUTION
Unit: in.
Check local electrical codes
and regulations before wiring.
Also, check any specified
instruction or limitations.
T
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. 3-104. For the method used to
insert the wiring, refer to the figure below. (Fig. 3-109)
CAUTION
(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.
When removing the fastening
bracket from the cover of the
electrical component box, use
caution to avoid dropping the
bracket.
Inter-unit control wiring
ø1-9/32 knock-out
Eyelet (supplied)
Powe supply outlet
Fig. 3-109
51
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Wall-Mounted Type (K Type)
3-29. 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.
Screws used during
transportation
Press
NOTE
Remove the rear panel
Tubing can be extended in 4 directions as shown in Fig. 3-111.
Select the direction which will provide the shortest run to the
outdoor unit.
Fig. 3-110
Left-rear tubing
3-30. 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.
Right-rear
tubing
(recommended)
Left tubing
Right tubing
(2) Determine which notch of the rear panel should be used.
(Fig. 3-112)
Fig. 3-111
(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.
K
(4) Using a sabre saw, key hole saw or hole-cutting drill attachment, make a hole (dia. 3-5/32") in the wall. (Fig. 3-113)
Center of left rear
tubing hole
(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. 3-114)
(6) Place the plastic cover over the end of the pipe (for indoor
side only) and insert in the wall. (Fig. 3-115)
Center of right rear
tubing hole
Tubing hole diameter
ø3-5/32
Fig. 3-112
Indoor
side
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.
3-31. 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.
Fig. 3-113
PVC pipe (locally purchased)
Cut at slight angle
a) If the Wall is Wooden
(1) Attach the rear panel to the wall with the 10 screws provided. (Fig. 3-116)
If you are not able to line up the holes in
OUTSIDE
INSIDE
Wall
the rear panel with the beam locations
Plastic
PVC pipe
cover
marked on the wall, use Rawl plugs or
toggle bolts to go through the holes on
Slight
angle
the panel or drill 3/16" dia. holes in the
panel over the stud locations and then
Fig. 3-115
mount the rear panel.
52
Fig. 3-114
Fig. 3-116
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(2) Check with a tape measure or carpenter’s level. This is
important so that the unit is correctly installed. (Fig. 3-117)
(3) Make sure the panel is flush against the wall. Any space
between the wall and unit will cause noise and vibration.
Fig. 3-117
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. 3-118)
3/16"
dia. hole
3-32. 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.
Rawl plug
Fig. 3-118
Removing the grille
(1) Lift up on both sides of the air-intake grille to open it.
(Fig. 3-119)
Intake grille
(2) Remove the filter. (Fig. 3-119)
(3) Adjust the flap so that it is horizontal. (Fig. 3-120)
(4) Open the installation screw covers below the grille
(3 locations). (Fig. 3-120)
Filter
Flap
(5) Remove the screws. (Fig. 3-120)
Open the grille
Fig. 3-119
(6) Remove the grille. (Fig. 3-121)
Attaching the grille
K
(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.
Installation screw cover
(3) Press on the installation tabs to completely close the grille.
Check that the grille and frame are fitted tightly together.
Fig. 3-120
3-33. 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. 3-122)
Remove the grille
b) Right-rear or left-rear tubing
In this case, the corners of the frame do not need to be
cut.
Fig. 3-121
Installation tabs
(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.
Frame
Right tubing
outlet
When left and right side tubing
Fig. 3-122
53
Installation tabs
Fig. 3-123
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Page 54
(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. 3-123)
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. 3-124)
Press
Fig. 3-124
Raising the clamp to lift up the indoor unit will facilitate this work.
(Fig. 3-125)
Clamp
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 3-1. “Removing the Rear Panel
from the Unit” (Fig. 3-110).
Then lift up the indoor unit to remove it.
3-34. Shaping the Tubing
Fig. 3-125
Right-rear tubing
(1) Shape the refrigerant tubing so that it can easily go into the hole.
(Fig. 3-126)
Rear panel tab
Insulating
tape
(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.
K
(3) Push the wiring, refrigerant tubing and drain hose through the hole
in the wall. Adjust the indoor unit so it is securely seated on the
rear panel.
Refrigerant
tubing
Indoor and
outdoor unit
connection wiring
Plastic cover
Fig. 3-126
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.
(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. 3-128)
Then fit the tubing into the tubing storage space in the rear of the
indoor unit and clamp in place.
Insulation
Fig. 3-127
Refrigerant tubing
Rear panel
Insulating tape
(3) Adjust the indoor unit so that it is securely installed onto the rear
panel.
Drain hose
3-35. Installing the Drain Hose
Fig. 3-128
a) The drain hose should be slanted downward to the
outside. (Fig. 3-129)
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.
WARNING
Inter-unit wiring
Do not supply power to the unit or operate
it until all tubing and wiring to the outdoor
unit are completed.
54
Indoor unit
Slant
Refrigerant
tubing
Fig. 3-129
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3-36. 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
Setting at time of
factory shipment
Slide No. 3 on SW101
from ON OFF.
K
KHX2452
CR-KR254GXH56A-0
Setting at time of
factory shipment
55
Slide No. 3 on SW101
from ON OFF.
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4. HOW TO INSTALL THE OUTDOOR UNIT
4-1. Installing the Outdoor Unit
Ordinarily, ensure a base height of 2 in. or more. If a drain
pipe is used, or for use in cold-weather regions, ensure a
height of 6 in. or more at the feet on both sides of the unit.
(In this case, leave clearance below the unit for the drain
pipe, and to prevent freezing of drainage water in
cold-weather regions.)
Drain port (2 locations)
6-47/64
Be sure to anchor the feet with the anchor bolts (M10 or
3/8"). In addition, use anchoring washers on the top side.
(Use large square 1-1/4" × 1-1/4" SUS washers with
diameters of 3/8".) (Field supply)
25-63/64
8-5/8
5-29/32
33/64
33/64
33/64
4-2. Drainage Work
33/64
37
Follow the procedure below to ensure adequate draining for
the outdoor unit.
For the drain port dimensions, refer to the figure at right.
Ensure a base height of 6 in. or more at the feet on both
sides of the unit.
4-3/8
14-61/64
15-15/16
Refer to the Fig. 4-1 for the anchor bolt dimensions.
13-13/64
11-21/32
25/32
25/64
Use concrete or a similar material to create the base, and
ensure good drainage.
3/4
19/32
4-3. Routing the Tubing and Wiring
The tubing and wiring can be extended out in 4 directions:
front, rear, right, and down.
The service valves are housed inside the unit. To access
them, remove the inspection panel. (To remove the
inspection panel, remove the 3 screws, then slide the
panel downward and pull it toward you.)
(1) If the routing direction is through the front, rear, or right,
use a nipper or similar tool to cut out the knockout holes for
the inter-unit control wiring outlet, power wiring outlet, and
tubing outlet from the appropriate covers A and B.
(2) If the routing direction is down, use a nipper or similar tool to
cut out the lower flange from cover A.
CAUTION
Route the tubing so that it does
not contact the compressor,
panel, or other parts inside the
unit. Increased noise will result if
the tubing contacts these parts.
Anchor bolt (M10 or 3/8")
Drain port
Unit: in.
Fig. 4-1
Inter-unit control wiring
Inspection panel
Rear
Cover B
Cover A
Front
Right
Power supply
Down
When routing the tubing, use a
tube bender to bend the tubes.
Tubing outlet
Fig. 4-2
56
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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.
(7) Regulations on wire diameters differ from locality
to locality. For field wiring rules, please refer to
your LOCAL ELECTRICAL CODES before beginning.
(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.
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:
(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.
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 damaged, it must be replaced by a repair shop
appointed by the manufacturer, because special
purpose tools are required.
(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.
5-2. Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit
Time delay fuse or
circuit capacity
Type
(A) Power supply wiring
CHX03652
For field wiring rules, please refer
to your LOCAL ELECTRICAL CODES
CHX06052
30 A
50 A
Indoor unit
Type
Time delay fuse or
circuit capacity
(B) Power supply wiring
K
A, X, T, U
15 A
For field wiring rules, please refer
to your LOCAL ELECTRICAL CODES
D
15 A
15 A
Control wiring
(C) Inter-unit (between outdoor and
indoor units) control wiring
(D) Remote control wiring
(E) Control wiring for group control
AWG #18 (0.75 mm2)
Use shielded wiring*
AWG #18 (0.75 mm2)
Use shielded wiring
AWG #18 (0.75 mm2)
Use shielded wiring
Max. 3,280 ft.
Max. 1,640 ft.
Max. 1,640 ft. (Total)
NOTE
* With ring-type wire terminal.
57
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5-3. Wiring System Diagram
Indoor
unit (No. 1)
L1
Power supply
208 / 230 V, 1ø, ~60Hz L2
Outdoor unit
INV unit
L1
A
L1
L2
L1
L2
L2
Ground
Remote
controller
WHT 1
BLK 2
Power supply
208 / 230 V, 1ø, ~60Hz
C
B
D
U1
U1
U2
U2
Ground
R1
1
2
Ground
R2
Ground
C
Indoor
unit (No. 2)
L1
Power supply
208 / 230 V, 1ø, ~60Hz L2
L1
L2
Ground
Remote
controller
WHT 1
BLK 2
B
U1
U2
D
R1
1
2
R2
Ground
C
Indoor
unit (No. 3)
Group control:
L1
Power supply
208 / 230 V, 1ø, ~60Hz L2
L1
L2
Ground
B
U1
E
U2
R1
R2
Ground
C
Indoor
unit (No. n)
L1
Power supply
208 / 230 V, 1ø, ~60Hz L2
L1
L2
Ground
Remote
controller
WHT 1
BLK 2
B
U1
U2
D
R1
1
2
R2
7P terminal board
Ground
NOTE
(1) Refer to Section 5-2. “Recommended Wire Length
and Wire Diameter for Power Supply System” for
the explanation of “A,” “B,” “C,” “D,” and “E,” in the
above diagram.
U1 U2 R1 R2
Remote
Inter-unit
control wiring controller
1(L1) 2(L2)
Power
supply
(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.
X, A, U, D, T Type
(3) Refrigerant Circuit (R.C.) address should be set
before turning the power on.
5P terminal board
(4) Regarding the R.C. address setting, refer to page
72. Auto. address setting can be executed by
remote controller automatically.
Refer to page 72 – 76.
1
2
3
4
5
1(L1)2(L2) U1 U2
Power
Inter-unit
supply control wiring
K Type
58
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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 wiring 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
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 wiring. Star branch wiring causes mis-address
setting.
Outdoor unit
NO
Outdoor unit
NO
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Branch point
Fig. 5-2
(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)
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
more than 3.3 ft.
Branch
point
16 or fewer
Indoor unit
Indoor unit
more than 3.3 ft.
Indoor unit
more than 3.3 ft.
Indoor unit
Fig. 5-3
59
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(5) Use shielded wires for inter-unit control wiring (c)
and ground the shield on both sides, otherwise
misoperation from noise may occur. (Fig. 5-4)
Connect wiring as shown in Section “5-3. Wiring
System Diagram.”
WARNING
Shielded wire
Loose wiring may cause
the terminal to overheat or
result in unit malfunction.
A fire hazard may also
exist. Therefore, ensure
that all wiring is tightly
connected.
Ground
Ground
Fig. 5-4
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
Stranded wire
Strip 3/8 in.
(1) Cut the wire end with cutting pliers, then strip the
insulation to expose the stranded wiring about 3/8 in.
and tightly twist the wire ends. (Fig. 5-5)
(2) Using a Phillips head screwdriver, remove the terminal
screw(s) on the terminal plate.
Ring
pressure
terminal
(3) Using a ring connector fastener or pliers, securely
clamp each stripped wire end with a ring pressure
terminal.
Fig. 5-5
(4) Place the ring pressure terminal, and replace and
tighten the removed terminal screw using a
screwdriver. (Fig. 5-6)
Special
washer
Screw
Ring pressure
terminal
Wire
Screw and
Special washer
Terminal plate
Ring
pressure
terminal
Wire
Fig. 5-6
60
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6. HOW TO PROCESS TUBING
Deburring
6-1. Connecting the Refrigerant Tubing
After
Before
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.
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.
Fig. 6-1
(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)
Copper
tubing
Reamer
NOTE
When reaming, hold the tube end downward and be
sure that no copper scraps fall into the tube. (Fig. 6-2)
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.)
Flare nut
Copper
tubing
NOTE
A good flare should have the following characteristics:
inside surface is glossy and smooth
edge is smooth
tapered sides are of uniform length
Flare tool
Fig. 6-3
61
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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.
Apply refrigerant
lubricant here and here
(2) Be sure to apply refrigerant lubricant to the matching
surfaces of the flare and union before connecting them
together. This is effective for reducing gas leaks. (Fig. 6-4)
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.
Union
Cautions During Brazing
Flare nut
Fig. 6-5
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.)
Torque wrench
Spanner
Do not allow the tubing to get too hot during brazing.
The nitrogen gas inside the tubing may overheat,
causing refrigerant system valves to become damaged. Therefore allow the tubing to cool when brazing.
Use a reducing valve for the nitrogen cylinder.
Do not use agents intended to prevent the formation
of oxide film. These agents adversely affect the
refrigerant and refrigerant oil, and may cause damage
or malfunctions.
Indoor unit
Outdoor unit
Fig. 6-6
Tube diameter
Tightening torque,
approximate
ø1/4"
(ø6.35 mm)
120 – 160 lbs · in.
(140 – 180 kgf · cm)
1/32"
(0.8 mm)
6-2. Connecting Tubing Between Indoor and Outdoor
Units
ø3/8"
(ø9.52 mm)
300 – 360 lbs · in.
(340 – 420 kgf · cm)
1/32"
(0.8 mm)
(1) Tightly connect the indoor-side refrigerant tubing extended
from the wall with the outdoor-side tubing.
ø1/2"
(ø12.7 mm)
430 – 530 lbs · in.
(490 – 610 kgf · cm)
1/32"
(0.8 mm)
ø5/8"
(ø15.88 mm)
590 – 710 lbs · in.
(680 – 820 kgf · cm)
5/128"
(1.0 mm)
ø3/4"
(ø19.05 mm)
870 – 1040 lbs · in.
(1000 – 1200 kgf · cm)
over 5/128"
(1.0 mm)
(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.
62
Tube thickness
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
Two tubes arranged together
Liquid tubing
Tubing Insulation
Thermal insulation must be applied to all unit tubing,
including distribution joint (purchased separately).
* For gas tubing, the insulation material must be heat
resistant to 248°F or above. For other tubing, it must
be heat resistant to 176°F or above.
Insulation material thickness must be 25/64" 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.
Gas tubing
Insulation
Fig. 6-7
Taping the flare nuts
CAUTION
If the exterior of the outdoor
unit 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.
Sealer (supplied)
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 tape (white)
(supplied)
Flare insulator (supplied)
Tube insulator
(not supplied)
Heat resistant
248°F or above
Unit side
insulator
Flare nut
Vinyl clamps (supplied)
Insulation material
Fig. 6-8
The material used for insulation must have good insulation
characteristics, be easy to use, be age resistant, and must
not easily absorb moisture.
Refrigerant tubing and insulator
(not supplied)
CAUTION
Drain insulator
and clamp.
Large
(supplied)
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.
Drain pipe and insulator
(not supplied)
Packing
clamp.
Small
hose band
(supplied)
Seal
Insulation
tape
Vinyl
Flare clamp
insulator
The procedure used for
installing the insulator for
both gas and liquid
tubes is the same.
Fig. 6-9
Never grasp the drain or refrigerant connecting
outlets when moving the unit.
63
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6-4. Taping the Tubes
(1) At this time, the refrigerant tubes (and electrical
wiring if local codes permit) should be taped
together with armoring tape in 1 bundle. To prevent
the condensation from overflowing the drain pan,
keep the drain hose separate from the refrigerant
tubing.
Clamp
(2) Wrap the armoring tape from the bottom of the
outdoor unit to the top of the tubing where it enters
the wall. As you wrap the tubing, overlap half of
each previous tape turn.
Insulated tubes Drain hose
(3) Clamp the tubing bundle to the wall, using 1 clamp
approx. each ft. (Fig. 6-10)
NOTE
Fig. 6-10
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.
Apply putty here
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)
Tubing
Fig. 6-11
64
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7. AIR PURGING
Manifold gauge
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
Fig. 7-1
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.
Vacuum pump
Outlet
Inlet
Air Purging with a Vacuum Pump (for Test Run)
Preparation
Check that each tube (both liquid and gas tubes) between
the indoor and outdoor units has been properly connected
and all wiring for the test run has been completed. Remove
the valve caps from both the gas tube and liquid tube
service valves on the outdoor unit. Note that both liquid and
gas tube service valves on the outdoor unit are kept closed
at this stage.
Fig. 7-2
Manifold valve
Pressure
gauge
Lo
Hi
Leak test
Charge hose
(1) Attach a manifold valve (with pressure gauges) and dry
nitrogen gas cylinder to this service port with charge
hoses.
CAUTION
Nitrogen gas cylinder
(In vertical standing
position)
Use a manifold valve for air
purging. If it is not available, use
a stop valve for this purpose. The
“Hi” knob of the manifold valve
must always be kept closed.
(2) Pressurize the system to no more than
512 psig (36 kgf/cm2G) with dry nitrogen gas and close
the cylinder valve when the gauge reading reaches
512 psig (36 kgf/cm2G). Then, test for leaks with liquid
soap.
CAUTION
Cylinder
valve
Service port ø5/16"
Open
Gas
tube
Close
Outdoor unit
To avoid nitrogen entering the
refrigerant system in a liquid state,
the top of the cylinder must be
higher than the bottom when you
pressurize the system. Usually,
the cylinder is used in a vertical
standing position. (Refer to the
previous page.)
65
Open
Liquid
tube
Close
Fig. 7-3
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(3) Do a leak test of all joints of the tubing (both indoor and
outdoor) and both gas tube and liquid tube service
valves. Bubbles indicate a leak. Wipe off the soap with a
clean cloth after the 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.
Manifold valve
Pressure
gauge
Lo
Hi
Evacuation
(1) Attach the charge hose end described in the preceding
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:
Vacuum pump
Service port ø5/16"
Open
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
Gas
tube
Close
Outdoor unit
Open
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 mmHg, 5 Torr).
(2) When the desired vacuum is reached, close the “Lo”
knob of the manifold valve and turn off the vacuum pump.
Confirm that the gauge pressure is under –14.7 psig
(–755 mmHg, 5 Torr) after 4 to 5 minutes of vacuum
pump operation.
66
Liquid
tube
Close
Fig. 7-4
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CAUTION
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Page 67
Use a cylinder designed for
use with R410A respectively.
Manifold valve
Pressure
gauge
Charging additional refrigerant
Lo
Hi
Charging additional refrigerant (calculated from the
liquid tube length as shown in Section 1-7
“Additional Refrigerant Charge”) using the liquid
tube service valve. (Fig. 7-5)
Use a balance 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 gas tube
service valve with the system in cooling operation
mode at the time of test run. (Fig. 7-6)
Valve
Liquid
Finishing the job
R410A
(1) With a hex wrench, turn the liquid tube service
valve stem counter-clockwise to fully open the
valve.
Close
Gas
tube
(2) Turn the gas tube service valve stem
counter-clockwise to fully open the valve.
CAUTION
Close
To avoid gas from leaking when
removing the charge hose,
make sure the stem of the gas
tube is turned all the way out
(“BACK SEAT” position).
Outdoor unit
Open
Liquid
tube
Close
(3) Loosen the charge hose connected to the gas
tube service port (for ø5/16" tube) slightly to
release the pressure, then remove the hose.
Fig. 7-5
(4) Replace the service port cap on the gas tube
service port and fasten the cap securely with an
monkey spanner or box wrench. This process is
very important to prevent gas from leaking from
the system.
Open
(5) Replace the valve caps at both gas tube and liquid
tube service valves and fasten them securely.
Gas
tube
Open
This completes air purging with a vacuum pump. The
air conditioner is now ready for a test run.
Outdoor unit
Close
Liquid
tube
Open
Fig. 7-6
67
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8. TEST RUN
8-1. Preparing for Test Run
Before attempting to start the air conditioner,
check the following.
ON
(1) All loose matter is removed from the cabinet,
especially steel filings, bits of wire, and clips.
(Power must be turned ON
at least 5 hours before
attempting test run)
(2) The control wiring is correctly connected and all
electrical connections are tight.
(3) The transportation pads for the indoor fan have
been removed. If not, remove them now.
Power mains switch
(4) 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)
Fig. 8-1
(5) Both the gas and liquid tube service valves are
open. If not, open them now. (Fig. 8-2)
(6) 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.
(7) Be sure to give the instruction manual and
warranty certificate to the customer.
(8) 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.
Gas tube service cap
Liquid tube service cap
Fig. 8-2
68
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8-2. Test Run Procedure
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 (2
locations) to the full-open positions.
Recheck the items to check before the test run.
<Outdoor unit control PCB>
Unit No. setting switch
(S004)
Set the No. of indoor units.
CASE 1
NO
Are the inter-unit control wires
connected to more than 1 refrigerant
system?
(Check the link wiring.)
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.
YES
<Outdoor unit control PCB>
Unit No. setting switch
(S002 and S003)
Set the system address.
When multiple outdoor units exist, disconnect the terminals
extended from the shorted plugs (CN33) at all outdoor main unit
PCBs except for 1.
Alternatively, move the sockets to the OPEN side.
Refer to Fig. 8-4
YES
Is it possible to turn ON the power only
for the 1 refrigerant system where the
test run will be performed?
CASE 2
Turn ON the indoor and
outdoor unit power for that
refrigerant system only.
NO
Will automatic address setting be
performed in Heating mode?
NO
YES
CASE 3B
Make necessary corrections.
Is it OK to start the compressors?
Is it OK to start the compressors?
Check the alarm contents.
Turn ON the indoor and
outdoor unit power.
Turn ON the indoor and
outdoor unit power.
*2
NO
Make necessary
corrections
*2
Short-circuit the mode change pin
(CN50) on the outdoor main unit PCB.
At the same time, short-circuit the
automatic address pin (CN51) for 1
second or longer, then pull it out.
*3
Turn OFF the indoor and
outdoor unit power
CASE 3A
Short-circuit the automatic address
pin (CN51) on the outdoor unit PCB
for 1 second or longer,
then release it.
Turn OFF the indoor
and outdoor unit
Refer to “Table of
Self-Diagnostic Functions and
Description of Alarm Displays.”
LED 1 and 2 blink alternately
(about 2 or 3 minutes).
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
*3
Start indoor and outdoor unit
heating operation.
LED 1 and 2 blink alternately.
Start indoor and outdoor unit
cooling operation.
LED 1 and 2 blink alternately.
Check the alarm
contents.
*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.
NO
Are LEDs 1 and 2 on the
outdoor unit PCB OFF?
YES
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.
Short-circuit the automatic address pin (CN51)
on the outdoor unit PCB for 1 second or longer,
then release it.
Does system operate?
NO
Check and make corrections according to
“Table of Self-Diagnostic Functions.”
YES
Return remote control to normal mode
End test run.
Fig. 8-3
69
YES
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8-3. Outdoor Unit PCB Setting
CN33
CN51
CN50
S003
S002
D043
(LED2)
S004
D042
(LED1)
Fig. 8-4
70
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Examples of the No. of indoor units settings
No. of indoor units
Indoor unit setting (S004)
(Rotary switch, red)
1
1 unit (factory setting)
Set to 2
9
9 units
2
2 units
Set to 1
Set to 9
Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used)
System address No.
System address (S003)
(2P DIP switch, blue)
10 20
ON
System address (S002)
(Rotary switch, black)
1
ON
System 1 (factory setting)
System 11
Both OFF
1 2
ON
OFF
ON
2
ON
OFF
ON
1 2
ON
OFF
ON
2
OFF
1
System 21
System 30
1
1 ON
2 ON
1 & 2 ON
1
1
0
71
Set to 1
Set to 1
Set to 1
Set to 0
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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 unit settings
(S004)
System address
(system 1 setting)
(S003)
ON
1
2
No. of indoor units
(8 units setting)
(S004)
(S002)
ON
1
8
OFF
Unit
No. 1
Outdoor Unit
Inter-unit control wiring
1-1
Indoor Unit
1-2
1-3
1-8
Remote controller
cross-over wiring
Remote controller
Fig. 8-5
(1) Automatic Address Setting from the Outdoor Unit
1. On the outdoor unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the
ON
DIP switch (S003) is set to “0.” ON
(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 8, on the outdoor unit control PCB set
the No. of indoor units rotary switch (S004) to “8.”
3. Turn ON the power to the indoor and outdoor units.
4. On the outdoor unit control PCB, short-circuit the automatic address pin (CN51) for 1 second or longer, then
release it.
↓
(Communication for automatic address setting begins.)
↓
* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.
The LED that indicates that automatic address setting is in progress turns OFF and the process is
stopped.
(Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)
↓
5. Operation from the remote controllers is now possible.
* To perform automatic address setting from the remote controller, perform steps 1 to 3, 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)
If link wiring is used
* When multiple outdoor units exist, remove the socket that
is used to short-circuit the terminal plug (CN33) from all
outdoor unit PCBs except for 1.
Alternatively, move the sockets to the “OPEN” side.
No. 1 unit settings
System address
(system 1 setting)
(S003)
(S004)
(S002)
ON
ON
No. of indoor units
(6 units setting)
1
6
1
2
OFF
Outdoor unit
system 1
Leave the socket
that is used to
short-circuit the
terminal plug.
(CN33)
Unit
No. 1
Inter-unit control wiring
1-1
Indoor unit
1-2
1-3
1-6
Remote controller
communication wiring
Remote
controller
No. 2 unit settings
(S002)
No. of indoor units
(7 units setting)
(S003)
ON
ON
7
System address
(system 2 setting)
(S004)
2
2
OFF
Outdoor unit
system 2
7
1
Leave the socket
that is used to open
circuit the terminal
plug (CN33).
Unit
No. 1
Inter-unit control wiring
To other system
link wiring
Indoor unit
2-1
2-2
2-7
Remote controller
cross-over wiring
Remote
controller
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.
Case 1
Indoor and outdoor unit power cannot be turned ON for each system separately.
Automatic address setting in Heating mode
Case 2
Automatic address setting in Cooling mode
Case 3
Fig. 8-6
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Case 1 Automatic Address Setting (no compressor operation)
Indoor and outdoor unit power can be turned ON for each system separately.
Indoor unit addresses can be set without operating the compressors.
Automatic Address Setting from Outdoor Unit
1. On the outdoor unit control PCB, check that the system address rotary switch (S002) is set to “1” and that the DIP
ON
switch (S003) is set to “0.” ON
(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 6, on the outdoor unit control PCB set the
No. of indoor units rotary switch (S004) to “6.”
3. At the outdoor unit where all indoor and outdoor unit power has been turned ON, short-circuit the automatic
address pin (CN51) for 1 second or longer, then pull it out.
↓
(Communication for automatic address setting begins.)
↓
* To cancel, again short-circuit the automatic address pin (CN51) for 1 second or longer, then pull it out.
The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.
(Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB turn OFF.)
↓
4. Next turn the power ON only for the indoor and outdoor units of the next (different) system. Repeat steps 1 – 3 in
the same way to complete automatic address settings for all systems.
↓
5. Operation from the remote controllers is now possible.
* To perform automatic address setting from the remote controller, perform steps 1 and 2, then use the remote controller
complete automatic address setting.
Refer to “Automatic Address Setting from the Remote Controller.”
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Case 2 Automatic Address Setting in Heating Mode
Indoor and outdoor unit power cannot be turned ON for each system separately.
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 and 2 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 unit control PCB in the refrigerant
system where you wish to set the addresses, short-circuit the automatic address pin (CN51) for 1 second or
longer, then pull it out.
(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 (CN51) for 1 second or longer, then pull it out.
The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.
(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit
control PCB turn OFF.)
4. At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN51) for 1 second or
longer, then pull it out.
↓
(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 and 2, then use the remote controller
complete automatic address setting.
Refer to “Automatic Address Setting from the Remote Controller.”
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Case 3 Automatic Address Setting in Cooling Mode
Indoor and outdoor unit power cannot be turned ON for each system separately.
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 and 2 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 unit control PCB in the refrigerant system
where you wish to set the addresses, short-circuit the mode change 2P pin (CN50). At the same time, short-circuit
the automatic address pin (CN51) for 1 second or longer, then pull it out. (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 (CN51) for 1 second or longer, then pull it out.
The LED that indicates automatic address setting is in progress turns OFF and the process is stopped.
(Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor unit control
PCB turn OFF.)
4. At the outdoor unit in the next (different) system, short-circuit the automatic address pin (CN51) for 1 second or
longer, then pull it out.
↓
(Repeat the same steps to complete automatic address setting for all units.)
↓
5.
Operation from the remote controllers is now possible.
* Automatic address setting in Cooling mode cannot be done from the remote controller.
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”
Press the remote controller timer time
button and
time. (Press and hold for 4 seconds or longer.)
button at the same
Next, press either the temperature setting
(Check that the item code is “A1.”)
button.
Use either the
or
automatic address setting.
Then press the
or
button to set the system No. to perform
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, “SETTING” is displayed on the remote
controller. This message disappears when automatic address setting is
completed.)
Repeat the same steps to perform automatic address setting for each successive system.
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Display during automatic address setting
On outdoor unit PCB
LED 2
1
Blink alternately
* Do not short-circuit the automatic address setting pin (CN51) again while automatic
address setting is in progress. Doing so will cancel the setting operation and will cause
LEDs 1 and 2 to turn OFF.
* When automatic address setting has been successfully completed, both LEDs 1 and 2 turn OFF.
* LED 1 is D042. LED 2 is D043.
* 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
LED 1
:: Blinking
: OFF)
Display meaning
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.
Alternating
Automatic address setting is in progress.
Automatic address setting completed.
Simultaneous
Alternating
Note:
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 displa y.
Refer to Table of Self-Diagnostic Functions and Description of Alarm Displays.
indicates that the solenoid is fused or that there is a C T (current detection circuit) failure (current is detected when
the compressor is OFF).
Remote controller display during automatic setting
is blinking
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 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 erased 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.
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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
6. Press the
button again and check the address of each indoor unit in sequence.
button again to return to normal remote controller mode.
Number changes to indicate which indoor unit is currently selected.
Remote Controller Test Run Settings
1. Press the remote controller
button for 4 seconds or longer. Then press the
button.
“TEST” 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
operation is stopped.
3. If correct operation is not possible, a code is displayed on the remote controller display.
(Refer to “7-6. Meaning of Alarm Messages” and correct the problem.)
4. After the test run is completed, press the
button again. Check that “TEST” disappears from the remote controller 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.)
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8-5. 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.
CAUTION
This outdoor unit cannot collect more than the rated refrigerant amount as shown
by the 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.
8-6. 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
LED 2
Alternating
(
Alarm contents
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.
Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.
Alarm is “P17.”
: Blinking)
Alarm
message
Possible cause of malfunction
Remote controller is detecting
Serial
commu-nication error signal from indoor unit.
errors
Mis-setting
Error in receiving serial communication signal.
(Signal from main indoor unit in case of group control)
Ex: Auto address is not completed.
<E01>
Error in transmitting serial communication signal.
<E02>
Indoor unit is detecting error signal from remote controller (and system controller).
Indoor unit is detecting error
signal from outdoor unit.
E04
Error of the outdoor unit in receiving serial communication signal
from the indoor unit.
<E06>
Improper setting of indoor unit or Indoor unit address setting is duplicated.
remote controller.
Remote controller address connector (RCU. ADR) is duplicated.
(Duplication of main remote controller)
Starting auto. address setting is prohibited.
During auto. address setting,
number of connected units does This alarm message shows that the auto address connector CN100
not correspond to number set.
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)
When turning on the power
Error in auto. address setting. (Number of connected indoor units
supply, number of connected
is more than the number set)
units does not correspond to
No
indoor unit is connected during auto. address setting.
number set.
(Except R.C. address is “0.”)
Error of outdoor unit address setting.
Indoor unit communication error
of group control wiring.
<<E03>>
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 main indoor unit in receiving serial communication signal
from sub indoor units.
E08
<<E09>>
E12
E15
E16
E20
E25
E18
Continued
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Alarm
message
Possible cause of malfunction
Serial
Improper setting.
commu-nication
errors
Mis-setting
This alarm message shows when the indoor unit for multiple-use
is not connected to the outdoor unit.
L02
Duplication of main indoor unit address setting in group control.
<L03>
Duplication of outdoor R.C. address setting.
There are 2 or more indoor units
Priority set remote controller
controllers which have operation
mode priority in 1 refrigerant circuit. Non-priority set remote controller
Group control wiring is connected to individual control indoor unit.
Indoor unit address is not set.
Protective device in indoor unit
is activated.
Protective device in outdoor unit
is activated.
Thermistor
fault
Indoor thermistor is either open
or damaged.
Outdoor thermistor is either
open or damaged.
Protective device for compressor
No. 1 is activated.
L06
L07
L08
<<L09>>
Capacity code of outdoor unit is not set.
L10
Mis-matched connection of outdoor units which have different kinds
of refrigerant.
L17
L18
Thermal protector in indoor unit fan motor is activated.
<<P01>>
Improper wiring connections of ceiling panel.
<<P09>>
Float switch is activated.
<<P10>>
Operation of protective function of fan inverter.
P12
O2 sensor (detects low oxygen level) activated.
P14
Compressor thermal protector is activated.
Power supply voltage is unusual. (The voltage is more than 260 V
or less than 160 V between L1 and L2 phase.)
Incorrect discharge temperature.
P02
P03
High pressure switch is activated.
P04
Detective phase (3-phase outdoor unit only)
P05
Compressor running failure resulting from missing phase in the
compressor wiring, etc. (Start failure not caused by IPM or no gas.)
P16
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.)
P22
IPM trip (IPM current or temperature)
H31
Inverter for compressor is unusual. (DC compressor does not
operate.)
P29
P26
Indoor coil temp. sensor (E1)
<<F01>>
Indoor coil temp. sensor (E2)
<<F02>>
Indoor coil temp. sensor (E3)
<<F03>>
Indoor suction air (room) temp. sensor (TA)
<<F10>>
Indoor discharge air temp. sensor (BL)
<<F11>>
Compressor discharge sensor (TD)
F04
Outdoor No. 1 coil liquid temp. sensor (C1)
F07
Outdoor air temp. sensor (TO)
F08
Compressor suction port temperature sensor (TS)
F12
High pressure sensor
F16
F29
EEPROM on indoor unit PCB failure
Protective
device for
compressor is
activated
L05
Capacity code of indoor unit is not set.
4-way valve operation failure
Activation of
protective
device
L04
EEPROM on the outdoor unit PCB is a failure.
F31
Current is not detected when comp. is ON.
H03
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9. APPENDIX
9-1. 4-Way Air Discharge Semi-Concealed Type (X Type)
NAME OF PARTS
X type (4-WAY)
Water drain
X
Ceiling panel
(optional)
Air outlet
(4 locations)
Air intake grille
(air intake)
CARE AND CLEANING
1. For safety, be sure to turn the air conditioner off and also to disconnect the power 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.
WARNING
Air intake and outlet side
(Indoor unit)
Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them
with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with a mild liquid detergent. 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
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 of the outdoor unit must be cleaned every year.
Consult your dealer or service center.
CAUTION
Air filter
Type
X
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.
Period
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.
CAUTION
When cleaning the air filter, never remove the safety chain. If it is necessary to remove it
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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4. Remove the air filter attached to the air intake grille.
Latch
X
Air intake
grille
Safety chain
Bolt screws
Air filter
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.
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.
Possible Cause
Trouble
Air conditioner does not run at all
Remedy
1. Power failure.
1. After a power outage, press ON/ OFF operation button
2. Leakage circuit breaker has tripped.
3. Line voltage is too low.
4. Operation button is turned off.
2. Contact service center.
3. Consult your electrician or dealer.
4. Press the button again.
5. The wired remote control unit or heat pump is
malfunctioning.
(The inspection mark
and the letters E, F,
5. Consult your dealer.
on the wired remote control unit.
H, L, P in combination with numbers appear
on the LCD of the wired remote control unit.)
Compressor runs but soon stops
1. Obstruction in front of condenser coil
1. Remove obstruction
Poor cooling (or heating) performance
1.
2.
3.
4.
1.
2.
3.
4.
Dirty or clogged air filter.
Heat source or many people in room.
Doors and/or windows are open.
Obstacle near air intake or air discharge port.
5. Thermostat is set too high for cooling
(or too low for heating).
6. (Defrosting system does not work.)
Clean air filter to improve the airflow.
Eliminate heat source if possible.
Shut them to keep the heat (or cold) out.
Remove it to ensure good airflow.
5. Set the temperature lower (or higher).
6. (Consult your dealer.)
Tips for Energy Saving
Avoid
Do
NOTE
• 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.
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)
Water drain
Air outlet
Air intake
A
Ceiling panel
(optional)
CARE AND CLEANING
WARNING
1. For safety, be sure to turn the air conditioner off and also to disconnect the power
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
(Indoor unit)
Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them
with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When cleaning
the air outlet side, be careful not to force the vanes out of place.
CAUTION
1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe
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 of the outdoor unit must be cleaned every year.
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
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.
Air filter finger-hold
Air intake grill
Air filter
<How to remove the filter>
1-way air discharge semi-concealed type (A):
de
Hook
Latch
Sli
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.
Screw
Screw
Air filter finger-hold
*Take hold of the finger-hold on the air filter, pull it toward you.
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Outdoor unit
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.
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
•
•
•
•
A
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.
Possible Cause
Trouble
Air conditioner does not run at all
Remedy
1. Power failure.
1. After a power outage, press ON/ OFF operation button
2. Leakage circuit breaker has tripped.
3. Line voltage is too low.
4. Operation button is turned off.
2. Contact service center.
3. Consult your electrician or dealer.
4. Press the button again.
5. The wired remote control unit or heat pump is
malfunctioning.
(The inspection mark
and the letters E, F,
5. Consult your dealer.
on the wired remote control unit.
H, L, P in combination with numbers appear
on the LCD of the wired remote control unit.)
Compressor runs but soon stops
1. Obstruction in front of condenser coil
1. Remove obstruction
Poor cooling (or heating) performance
1.
2.
3.
4.
1.
2.
3.
4.
Dirty or clogged air filter.
Heat source or many people in room.
Doors and/or windows are open.
Obstacle near air intake or air discharge port.
5. Thermostat is set too high for cooling
(or too low for heating).
6. (Defrosting system does not work.)
Clean air filter to improve the airflow.
Eliminate heat source if possible.
Shut them to keep the heat (or cold) out.
Remove it to ensure good airflow.
5. Set the temperature lower (or higher).
6. (Consult your dealer.)
Tips for Energy Saving
Avoid
Do
NOTE
• 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.
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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9-3. Concealed Duct (High-Static Pressure) Type (U, D Type)
NAME OF PARTS
CONCEALED DUCT
CONCEALED DUCT
U type (standard static pressure)
Air outlet grille
(optional)
D type (high static pressure)
Flexible duct
(optional)
Air intake
sideduct flange
(rear)
Water drain
Water drain
Canvas duct
(optional)
Electrical box
Air intake grille
(air intake)
(optional)
Air outlet side
duct flange
D
CARE AND CLEANING
WARNING
Air intake and outlet side
(Indoor unit)
1. For safety, be sure to turn the air conditioner off and also to disconnect the power 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.
Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them
with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When cleaning the air outlet side, be careful not to force the vanes out of place.
CAUTION
Type
U, D*
1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe 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 of the outdoor unit must be cleaned every year.
Consult your dealer or service center.
Period
(Depends on filter
specifications)
U
*Concealed duct type (U, D):
An air filter is not provided with this air conditioner at the time of shipment. To get clean air
and to extend the service life of the air conditioner, an air filter must be installed in the air
intake. For installation and cleaning the air filter, consult your dealer or service center.
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.
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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.
Possible Cause
Trouble
Air conditioner does not run at all
Remedy
1. Power failure.
1. After a power outage, press ON/ OFF operation button
2. Leakage circuit breaker has tripped.
3. Line voltage is too low.
4. Operation button is turned off.
2. Contact service center.
3. Consult your electrician or dealer.
4. Press the button again.
5. The wired remote control unit or heat pump is
malfunctioning.
(The inspection mark
and the letters E, F,
5. Consult your dealer.
on the wired remote control unit.
H, L, P in combination with numbers appear
on the LCD of the wired remote control unit.)
U
Compressor runs but soon stops
1. Obstruction in front of condenser coil
1. Remove obstruction
Poor cooling (or heating) performance
1.
2.
3.
4.
1.
2.
3.
4.
Dirty or clogged air filter.
Heat source or many people in room.
Doors and/or windows are open.
Obstacle near air intake or air discharge port.
5. Thermostat is set too high for cooling
(or too low for heating).
6. (Defrosting system does not work.)
D
Clean air filter to improve the airflow.
Eliminate heat source if possible.
Shut them to keep the heat (or cold) out.
Remove it to ensure good airflow.
5. Set the temperature lower (or higher).
6. (Consult your dealer.)
Tips for Energy Saving
Avoid
Do
NOTE
• 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.
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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9-4. Ceiling-Mounted Type (T Type)
NAME OF PARTS
CEILING-MOUNTED
T type
Air outlet
Water drain
(Drain pipe can be
connected to either
the left or right side.)
Air intake
grille (air
intake)
CARE AND CLEANING
WARNING
Air intake and outlet side
(Indoor unit)
1. For safety, be sure to turn the air conditioner off and also to disconnect the power 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.
Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them
with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with a mild liquid detergent. When cleaning the air outlet side, be careful not to force the vanes out of place.
CAUTION
1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe 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 of the outdoor unit must be cleaned every year.
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
T
Period
2 weeks
<How to clean the filter>
NOTE
The frequency with which the filter should be cleaned depends on the environment in which the
unit is used.
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.
Air filter finger-hold
Air intake grill
Air intake grill
finger-hold
Screw
Air filter
de
Hook
Sli
<How to remove the filter> 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.
Screw
Latch
Air filter finger-hold
* Take hold of the finger-hold on the air filter, pull it toward you.
87
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CAUTION
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Page 88
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.
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.
Possible Cause
Trouble
Air conditioner does not run at all
Remedy
1. Power failure.
1. After a power outage, press ON/ OFF operation button
2. Leakage circuit breaker has tripped.
3. Line voltage is too low.
4. Operation button is turned off.
2. Contact service center.
3. Consult your electrician or dealer.
4. Press the button again.
5. The wired remote control unit or heat pump is
malfunctioning.
(The inspection mark
and the letters E, F,
5. Consult your dealer.
on the wired remote control unit.
T
H, L, P in combination with numbers appear
on the LCD of the wired remote control unit.)
Compressor runs but soon stops
1. Obstruction in front of condenser coil
1. Remove obstruction
Poor cooling (or heating) performance
1.
2.
3.
4.
1.
2.
3.
4.
Dirty or clogged air filter.
Heat source or many people in room.
Doors and/or windows are open.
Obstacle near air intake or air discharge port.
5. Thermostat is set too high for cooling
(or too low for heating).
6. (Defrosting system does not work.)
Clean air filter to improve the airflow.
Eliminate heat source if possible.
Shut them to keep the heat (or cold) out.
Remove it to ensure good airflow.
5. Set the temperature lower (or higher).
6. (Consult your dealer.)
Tips for Energy Saving
Avoid
Do
NOTE
• 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.
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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Page 89
9-5. Wall-Mounted Type (K Type)
NAME OF PARTS
K Type (Wall-Mounted)
Air intake
Air outlet
CARE AND CLEANING
1. For safety, be sure to turn the air conditioner off and also to disconnect the power 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.
WARNING
Air intake and outlet side
(Indoor unit)
Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe them
with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with a mild liquid detergent. 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
parts using very hot water.
2. Some meta l 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 of the outdoor unit must be cleaned every year.
Consult your dealer or service center.
CAUTION
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
K
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. Move the flap on the air outlet grille to its lowest position with the remote control unit.
2. The filter is disengaged by pushing the tab up gently. Hold the air filter by the tab at the bottom,
and pull downward.
Air intake grille
Air filter
When replacing the filter, make sure that the FRONT mark is facing you.
Push it up until you hear it click back into position.
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CAUTION
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Page 90
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.
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.
Possible Cause
Trouble
Air conditioner does not run at all
Remedy
1. Power failure.
1. After a power outage, press ON/ OFF operation button
2. Leakage circuit breaker has tripped.
3. Line voltage is too low.
4. Operation button is turned off.
2. Contact service center.
3. Consult your electrician or dealer.
4. Press the button again.
5. The wired remote control unit or heat pump is
malfunctioning.
(The inspection mark
and the letters E, F,
5. Consult your dealer.
on the wired remote control unit.
H, L, P in combination with numbers appear
on the LCD of the wired remote control unit.)
K
Compressor runs but soon stops
1. Obstruction in front of condenser coil
1. Remove obstruction
Poor cooling (or heating) performance
1.
2.
3.
4.
1.
2.
3.
4.
Dirty or clogged air filter.
Heat source or many people in room.
Doors and/or windows are open.
Obstacle near air intake or air discharge port.
5. Thermostat is set too high for cooling
(or too low for heating).
6. (Defrosting system does not work.)
Clean air filter to improve the airflow.
Eliminate heat source if possible.
Shut them to keep the heat (or cold) out.
Remove it to ensure good airflow.
5. Set the temperature lower (or higher).
6. (Consult your dealer.)
Tips for Energy Saving
Avoid
Do
NOTE
• 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.
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.
90