Page 1
Notice
CORRECTION
SERVICE FLASH
PRODUCTION CHANGE
ADDED INFORMATION
REFERENCE NO. SM700856-03
FILE NO.
Page No.
of the Manual
Contents
Table 6
Reason
for change
Please add this notice to the TECHNICAL & SERVICE MANUAL listed below.
The reason for change
< Reference No. >
Current
A : Correction B : Quality reliability C : Standardization
D : Design change E : Addition of parts F : New information
Category :
Model :
Destination :
Serial No. :
North America
Issue Number : 3
DC INVERTER MULTI-SYSTEM AIR CONDITIONER
CM1972A
CM2472A
CM3172A
Date : June, 2011
New
SM700856-03SM700856-02
A
Product Code No.
1 852 356 14
1 852 356 11
1 852 356 12
Capacity at 230V
19,700 BTU/h
25,400 BTU/h
30,600 BTU/h
Outdoor Model No.
CM1972A
CM2472A
CM3172A
APPENDIX A
21
Fuse or Circuit Capacity of CM1972A : 20 15
Page 2
For Parts or Service Assistance please contact your local Sanyo HVAC Contractor or Distributor
United States: SCS, HVAC Solutions
Web: www.SanyoHVAC.com
Parts: hvac.parts@sna.sanyo.com
Service: hvac.service@sna.sanyo.com
Canada: Sanyo Canada Inc.
Web: www.SanyoHVAC.com
Parts/Service: hvac@sci.sanyo.com
6/11 Printed in Japan
Page 3
TECHNICAL & SERVICE MANUAL
OUTDOOR UNIT : CM1972A
FILE NO.
CM2472A
CM3172A
Destination: North America
DC INVERTER MULTI-SYSTEM AIR CONDITIONER
Product Code No.
1 852 356 14
1 852 356 11
1 852 356 12
< Applicable Indoor Units >
Wall mounted type
KMS0772
KMS0972
KMS1272
KMS1872
KMS2472
Semi-concealed type
XMS0972 & PNR-XS1872
XMS1272 & PNR-XS1872
XS1872 & PNR-XS1872
CM1972A
Capacity at 230V
19,700 BTU/h
25,400 BTU/h
30,600 BTU/h
Outdoor Model No.
CM1972A
CM2472A
CM3172A
CM2472A
CM3172A
NOTE
For details about the combination, refer to
"Unit Combination Table" in the Appendix
of this manual.
IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
REFERENCE NO.
SM700856-03
Page 4
SAFETY PRECAUTIONS
• Before doing repair work, please read the " SAFETY PRECAUTIONS" carefully and fully understand them.
• The precautionary items here are divided into " Warning" and " Caution" items.
Items in particular which may cause death or serious injury to the service personnel if the work is not performed correctly,
are included in the " Warning" table.
However, even precautionary items identified as " Caution" also have the potential for serious consequences
if not performed correctly.
Important safety precautions are described for all items in both categories. Be sure to carefully follow all of them.
• Symbol Indication
: This symbol indicates items to which we need to pay attention.
In this triangle, a definite precautionary item is described.
: This symbol indicates the item to be prohibited.
In or close to this circle, a prohibited item is described.
: This symbol indicates the items requiring special attention or instruction.
In or close to this circle, a prohibited item is described.
• After doing repair work, perform a test run to confirm that there are no abnormalities.
At the same time, explain the precautions in use to the user.
Warning
Before performing an overhaul, disconnect the power plug or power cable from the unit.
Performing the work with the power supplied to the unit, may cause an electric shock.
When repair work or circuit inspection that requires power supply for the air conditioner, is to be performed,
do not touch the charging section.
Doing so may cause an electric shock.
Prohibit
For the step-up capacitor attached to the electric section, perform the repair work after sufficiently discharging it.
Insufficient capacitor discharge may cause an electric shock.
Do not perform repair work on the electric sections with wet hands.
Doing so may cause an electric shock.
Do not start or stop the air conditioner by means of connecting or disconnecting the power plug.
Doing so may cause an electric shock or fire.
When conducting repair work only use components included in the parts list for the corresponding unit and perform
the work with the appropriate tools.
Incorrect or poor repair work may cause an electric shock or fire.
Never modify the unit.
Doing so may cause an electric shock or fire.
Perform all electric work according to local applicable regulations related to electrical equipment or interior wiring
regulation and make sure to use the exclusive circuit.
Insufficient capacity to the electric circuit or defective arrangement results may cause an electric shock or fire.
Make sure to replace any power cable or lead wire showing any signs of scratch or deterioration.
Failure to do so may cause an electric shock, overheating or fire.
Make sure that there is no dust on or slack in the power plug and insert fully into the socket.
Dust or incomplete connections may cause an electric shock or fire.
Do not damage or process the power cord, as it may cause an electric shock or fire.
Prohibit
Prohibit
Prohibit
Prohibit
For the wiring between the indoor unit and outdoor unit, securely fix the specified cable onto the terminal plate.
Poorly fixed wiring may cause a heat or fire.
After connecting the wiring between the indoor unit and outdoor unit, attach the terminal cover securely.
Incomplete attachment of the terminal cover may cause overheating or fire.
2
Page 5
Warning
If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.
If refrigerant gas leaks during the work, ventilate the room.
If refrigerant gas catches fire, harmful gas may be generated.
Do not mix any gas other than the specified refrigerant gas in the refrigerating cycle.
If air or other contaminants mix with the gas, pressure will become extremely high in the refrigerating cycle,
which may cause a unit breakdown."
When the welded section of the compressor intake or discharge pipe is to be disconnected, perform it in
a well-ventilated place after sufficiently recovering the refrigerant gas.
Any residue gas may jet out refrigerant or refrigerating machine oil, which may cause an injury.
When the work is to be performed in a high place (About 2 meters or more), make sure to wear a safety helmet,
gloves and safety belt. Insufficient safety gear may cause a serious injury in case of a fall.
When the unit is to be relocated, confirm that the new installation location has sufficient strength for the weight of the unit.
Insufficient strength of the installation location and incomplete installation work may cause an injury due to
the unit falling.
When the remote controller batteries are replaced, dispose of the old batteries out of the reach of children.
If a child swallows a battery, make sure that the child gets immediate medical attention.
Caution
Prohibit
Prohibit
Do not wash the air conditioner with water, as this may cause an electric shock or fire.
For the repair work in places with high humidity or moisture, make sure to ground the unit.
Failure to do so may cause an electric shock.
Confirm that the component attachment position, wiring condition, soldering condition and connector connection
are normal.
If not, it may cause overheating or fire.
Confirm that the temperature around the compressor is not too high, and then perform the repair work.
Failure to do so may cause a burn.
Perform welding work in a place with good ventilation.
If the work is performed in a poorly ventilated area, it might cause a lack of oxygen.
If the installation plate or attachment frame has deteriorated due to corrosion, etc., replace it.
Failure to do so may cause an injury due to the unit falling.
When the cleaning is to be performed, make sure to turn off the power and pull out the plug.
Touching the fan that is rotating at high speed may result in an injury.
When the indoor unit is to be removed, do not place it on an incline.
Doing so may cause wet furniture because water left inside may trickle down.
Do not hold the sharp end of the unit or the aluminum fins, as it may cause an injury to your hand or finger.
Prohibit
Prohibit
Prohibit
After repairs, make sure to measure the insulation resistance and confirm that the value is 1 Mohm or more.
Any insulation error may cause an electric shock.
After repairs, make sure to check the drainage of the indoor unit.
Inappropriate drainage may cause wet furniture and floors due to water leakage.
3
Page 6
Table of Contents
2
4
6
7
8
14
17
18
21
24
47
53
56
60
62
63
64
65
69
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Page
SAFETY PRECAUTIONS
TABLE OF CONTENTS
APPLICABLE INDOOR UNITS
1. OPERATING RANGE
2. SPECIFICATIONS
2-1. Unit Specifications
2-2. Major Component Specifications
2-3. Other Component Specifications
3. DIMENSIONAL DATA
4. REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram
5. PERFORMANCE DATA
5-1. Temperature Charts
5-2. Cooling Capacity
6. ELECTRICAL DATA
6-1. Electric Wiring Diagrams
7. FUNCTIONS
7-1. Explanation of Functions
7-2. Protective Functions
8. TROUBLESHOOTING
8-1. Precautions before Performing Inspection or Repair
8-2. Trouble Diagnosis by Error Monitop Lamps
8-3. Checking the Outdoor System
8-4. Trouble Diagnosis of Each Part
8-5. Trouble Diagnosis of Fan Motor
4
Page 7
70
71
72
72
73
75
76
76
A-1
A-2
.........................................................................
...................................................................................................
................................................................................................
............................................................................................
....................................................................................
............................................................................................
..........................................................................................
............................................................................................
.............................................................................
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Page
9. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
9-1. Characteristics of New Refrigerant R410A
9-2. Checklist before Servicing
9-3. Tools Specifically for R410A
9-4. Tubing Installation Procedures
9-5. In Case of Compressor Malfunction
9-6. In Case Refrigerant is Leaking
9-7. Charging Additional Refrigerant
9-8. Retro-Fitting Existing Systems
APPENDIX A INSTALLATION INSTRUCTIONS
APPENDIX B UNIT COMBINATION TABLES
5
Page 8
APPLICABLE INDOOR UNITS
Wall Mounted Type
Indoor Unit
KMS0772
Multi-Outdoor Unit
KMS0972 KMS1272 KMS1872 KMS2472
3-Room
4-Room
4-Room
CM1972A
CM2472A
CM3172A
Semi-Concealed Type
Indoor Unit
Multi-Outdoor Unit
3-Room
4-Room
4-Room
CM1972A
CM2472A
CM3172A
YES
YES
YES
XMS0972
&
PNR-XS1872
YES
YES
YES
YES
YES
YES
XMS1272
&
PNR-XS1872
YES
YES
YES
YES
YES
YES
XS1872
&
PNR-XS1872
YES
YES
YES
YES
YES
YES
NO
YES
YES
6
Page 9
1. OPERATING RANGE
Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.
Cooling
Maximum
Minimum
95 °F D.B. / 71 °F W.B.
67 °F D.B. / 57 °F W.B.
115 °F D.B.
14 °F D.B.
7
Page 10
2. SPECIFICATIONS
2-1. Unit Specifications
Outdoor Unit CM1972A
Indoor Unit KMS0972
× 3
Remarks:
1. The values shown in performance section and electrical rating section above are based on the following unit combination.
For other combination unit, please refer to the "Unit Combination Tables" in this manual.
Indoor Unit : KMS0972 3units Outdoor Unit : CM1972A 1unit
2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B.
Outdoor air temp. 95°F D.B./ 75°F W.B.
< 230V >
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
7.0
1,570
19,700
5.80
( 9,800 to 19,700 )
( 2.90 to 5.80 )
Shipping Volume
Cooling
16,800
2,900
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m
3
)
(mm)
inch
(mm)
3-Room Multi Outdoor Unit
Outdoor Unit
inch
187 to 253
Dimensions & Weight
Refrigerant Tubing Connections
Unit Dimensions
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Operation Sound (High) Cool
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
138.9
147.7
12.71
(63.0)
(67.0)
(0.36)
33-27/32 × 40-5/8 × 16-1/4
(860 × 1,032 × 413)
(740 × 900 × 320)
Outdoor Unit
29-1/8 × 35-7/16 × 12-19/32
1/4 (6.35) × 3
3/8 (9.52) × 3
ft (m)
dB-A
Max. allowable tubing length per unit
Flare Type
82 (25)
R410A / 6.17 (2,800)
Electric Expansion Valve
DC Twin Rotary (Inverter)
Fan Speeds Auto (Hi, Me, Lo)
Control Microprocessor
Features
Compressor Locked Rotor Amperes
50
BTU/h
Performance
%Power Factor 98
A 13.0
Type
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 16.5
3Number of Connectable Indoor Units
3Number of Operatable Indoor Units
230V Single-Phase 60HzVoltage Rating
1,707 (2,900)Air Circulation (High) ft3/min (m3/h)
EER BTU/h/W 12.5
Fuse or Circuit Breaker Capacity 15A
8
Page 11
Outdoor Unit CM1972A
Indoor Unit KMS0972
Type
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Available Voltage Range
Running Amperes
EER BTU/h/W 12.5
SEER BTU/Wh 16.5
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity 15A
Control Microprocessor
Fan Speeds Auto (Hi, Me, Lo)
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Operation Sound (High) Cool
Features
Refrigerant Tubing Connections
Max. allowable tubing length per unit
Refrigerant inch (mm)
Tube Diameter inch (mm)
Unit Dimensions
Height × Width × Depth
Package Dimensions
Height × Width × Depth
Weight
Shipping Volume
Dimensions & Weight
× 3
Narrow tube
Wide tube
Net
Shipping
BTU/h
kW
BTU/h
BTU/h
V
A
WPower Input
%Power Factor 98
A 13.0
dB-A
ft (m)
inch
(mm)
inch
(mm)
Ibs (kg)
Ibs (kg)
3
cu.ft (m
)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
3-Room Multi Outdoor Unit
208V Single-Phase 60HzVoltage Rating
Cooling
19,700
29-1/8 × 35-7/16 × 12-19/32
33-27/32 × 40-5/8 × 16-1/4
( 9,800 to 19,700 )
5.80
( 2.90 to 5.80 )
16,800
1,707 (2,900)Air Circulation (High) ft3/min (m3/h)
187 to 253
1,570
Outdoor Unit
DC Twin Rotary (Inverter)
R410A / 6.17 (2,800)
Electric Expansion Valve
Flare Type
82 (25)
1/4 (6.35) × 3
3/8 (9.52) × 3
Outdoor Unit
(740 × 900 × 320)
(860 × 1,032 × 413)
138.9
147.7
12.71
< 208V >
3Number of Connectable Indoor Units
3Number of Operatable Indoor Units
2,900
7.7
50
(63.0)
(67.0)
(0.36)
Remarks:
1. The values shown in performance section and electrical rating section above are based on the following unit combination.
For other combination unit, please refer to the "Unit Combination Tables" in this manual.
Indoor Unit : KMS0972 3units Outdoor Unit : CM1972A 1unit
2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B.
Outdoor air temp. 95°F D.B./ 75°F W.B.
9
Page 12
Outdoor Unit CM2472A
Indoor Unit KMS0972
Type
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Available Voltage Range
Running Amperes
EER BTU/h/W 9.9
SEER BTU/Wh 16.2
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A20
Control Microprocessor
Fan Speeds Auto (Hi, Me, Lo)
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Operation Sound (High) Cool
Features
Refrigerant Tubing Connections
Max. allowable tubing length per unit
Refrigerant inch (mm)
Tube Diameter inch (mm)
Unit Dimensions
Height × Width × Depth
Package Dimensions
Height × Width × Depth
Weight
Shipping Volume
Dimensions & Weight
× 3
Narrow tube
Wide tube
Net
Shipping
BTU/h
kW
BTU/h
BTU/h
V
A
WPower Input
%Power Factor 98
A 13.0
dB-A
ft (m)
inch
(mm)
inch
(mm)
Ibs (kg)
Ibs (kg)
3
cu.ft (m
)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
4-Room Multi Outdoor Unit
230V Single-Phase 60HzVoltage Rating
Cooling
25,400
3/8 (9.52) × 3 + 1/2 (12.7) × 1
29-1/8 × 35-7/16 × 12-19/32
33-27/32 × 40-5/8 × 16-1/4
( 9,800 to 25,400 )
7.50
( 2.90 to 7.50 )
21,400
1,707 (2,900)Air Circulation (High) ft3/min (m3/h)
187 to 253
2,560
Outdoor Unit
DC Twin Rotary (Inverter)
R410A / 6.17 (2,800)
Electric Expansion Valve
Flare Type
82 (25)
1/4 (6.35) × 4
Outdoor Unit
(740 × 900 × 320)
(860 × 1,032 × 413)
138.9
147.7
12.71
< 230V >
4Number of Connectable Indoor Units
4Number of Operatable Indoor Units
4,000
11.3
50
(63.0)
(67.0)
(0.36)
Remarks:
1. The values shown in performance section and electrical rating section above are based on the following unit combination.
For other combination unit, please refer to the "Unit Combination Tables" in this manual.
Indoor Unit : KMS0972 3units Outdoor Unit : CM2472A 1unit
2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B.
Outdoor air temp. 95°F D.B./ 75°F W.B.
10
Page 13
Outdoor Unit CM2472A
Indoor Unit KMS0972
Type
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Available Voltage Range
Running Amperes
EER BTU/h/W 9.9
SEER BTU/Wh 16.2
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A20
Control Microprocessor
Fan Speeds Auto (Hi, Me, Lo)
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Operation Sound (High) Cool
Features
Refrigerant Tubing Connections
Max. allowable tubing length per unit
Refrigerant inch (mm)
Tube Diameter inch (mm)
Unit Dimensions
Height × Width × Depth
Package Dimensions
Height × Width × Depth
Weight
Shipping Volume
Dimensions & Weight
× 3
Narrow tube
Wide tube
Net
Shipping
BTU/h
kW
BTU/h
BTU/h
V
A
WPower Input
%Power Factor 98
A 13.0
dB-A
ft (m)
inch
(mm)
inch
(mm)
Ibs (kg)
Ibs (kg)
3
cu.ft (m
)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
4-Room Multi Outdoor Unit
208V Single-Phase 60HzVoltage Rating
Cooling
24,400
3/8 (9.52) × 3 + 1/2 (12.7) × 1
29-1/8 × 35-7/16 × 12-19/32
33-27/32 × 40-5/8 × 16-1/4
( 9,800 to 24,400 )
7.20
( 2.90 to 7.20 )
20,600
1,707 (2,900)Air Circulation (High) ft3/min (m3/h)
187 to 253
2,560
Outdoor Unit
DC Twin Rotary (Inverter)
R410A / 6.17 (2,800)
Electric Expansion Valve
Flare Type
82 (25)
1/4 (6.35) × 4
Outdoor Unit
(740 × 900 × 320)
(860 × 1,032 × 413)
138.9
147.7
12.71
< 208V >
4Number of Connectable Indoor Units
4Number of Operatable Indoor Units
3,800
12.5
50
(63.0)
(67.0)
(0.36)
Remarks:
1. The values shown in performance section and electrical rating section above are based on the following unit combination.
For other combination unit, please refer to the "Unit Combination Tables" in this manual.
Indoor Unit : KMS0972 3units Outdoor Unit : CM2472A 1unit
2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B.
Outdoor air temp. 95°F D.B./ 75°F W.B.
11
Page 14
Outdoor Unit CM3172A
Indoor Unit KMS0972
Type
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Available Voltage Range
Running Amperes
EER BTU/h/W 10.9
SEER BTU/Wh 17.6
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A20
Control Microprocessor
Fan Speeds Auto (Hi, Me, Lo)
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Operation Sound (High) Cool
Features
Refrigerant Tubing Connections
Max. allowable tubing length per unit
Refrigerant inch (mm)
Tube Diameter inch (mm)
Unit Dimensions
Height × Width × Depth
Package Dimensions
Height × Width × Depth
Weight
Shipping Volume
Dimensions & Weight
× 4
Narrow tube
Wide tube
Net
Shipping
BTU/h
kW
BTU/h
BTU/h
V
A
WPower Input
%Power Factor 99
A 17.0
dB-A
ft (m)
inch
(mm)
inch
(mm)
Ibs (kg)
Ibs (kg)
cu.ft (m
3
)
35-1/32 × 35-7/16 × 12-19/32
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
4-Room Multi Outdoor Unit
230V Single-Phase 60HzVoltage Rating
Cooling
30,600
3/8 (9.52) × 2 + 1/2 (12.7) × 2
( 9,800 to 30,600 )
9.00
( 2.90 to 9.00 )
25,800
1,942 (3,300)Air Circulation (High) ft3/min (m3/h)
187 to 253
2,800
Outdoor Unit
DC Twin Rotary (Inverter)
R410A / 8.38 (3,800)
Electric Expansion Valve
Flare Type
100 (30.5)
1/4 (6.35) × 4
Outdoor Unit
(890 × 900 × 320)
39-3/4 × 40-5/8 × 16-1/4
(1,010 × 1,032 × 413)
174.2
183.0
15.18
< 230V >
4Number of Connectable Indoor Units
4Number of Operatable Indoor Units
4,800
12.3
53
(79.0)
(83.0)
(0.43)
Remarks:
1. The values shown in performance section and electrical rating section above are based on the following unit combination.
For other combination unit, please refer to the "Unit Combination Tables" in this manual.
Indoor Unit : KMS0972 4units Outdoor Unit : CM3172A 1unit
2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B.
Outdoor air temp. 95°F D.B./ 75°F W.B.
12
Page 15
Outdoor Unit CM3172A
Indoor Unit KMS0972
Type
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Available Voltage Range
Running Amperes
EER BTU/h/W 10.9
SEER BTU/Wh 17.6
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A20
Control Microprocessor
Fan Speeds Auto (Hi, Me, Lo)
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Operation Sound (High) Cool
Features
Refrigerant Tubing Connections
Max. allowable tubing length per unit
Refrigerant inch (mm)
Tube Diameter inch (mm)
Unit Dimensions
Height × Width × Depth
Package Dimensions
Height × Width × Depth
Weight
Shipping Volume
Dimensions & Weight
× 4
Narrow tube
Wide tube
Net
Shipping
BTU/h
kW
BTU/h
BTU/h
V
A
WPower Input
%Power Factor 99
A 17.0
dB-A
ft (m)
inch
(mm)
inch
(mm)
Ibs (kg)
Ibs (kg)
cu.ft (m
3
)
35-1/32 × 35-7/16 × 12-19/32
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
4-Room Multi Outdoor Unit
208V Single-Phase 60HzVoltage Rating
Cooling
28,600
3/8 (9.52) × 2 + 1/2 (12.7) × 2
( 9,800 to 28,600 )
8.40
( 2.90 to 8.40 )
24,200
1,942 (3,300)Air Circulation (High) ft3/min (m3/h)
187 to 253
2,800
Outdoor Unit
DC Twin Rotary (Inverter)
R410A / 8.38 (3,800)
Electric Expansion Valve
Flare Type
100 (30.5)
1/4 (6.35) × 4
Outdoor Unit
(890 × 900 × 320)
39-3/4 × 40-5/8 × 16-1/4
(1,010 × 1,032 × 413)
174.2
183.0
15.18
< 208V >
4Number of Connectable Indoor Units
4Number of Operatable Indoor Units
4,400
13.6
53
(79.0)
(83.0)
(0.43)
Remarks:
1. The values shown in performance section and electrical rating section above are based on the following unit combination.
For other combination unit, please refer to the "Unit Combination Tables" in this manual.
Indoor Unit : KMS0972 4units Outdoor Unit : CM3172A 1unit
2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B.
Outdoor air temp. 95°F D.B./ 75°F W.B.
13
Page 16
2-2. Major Component Specifications
2-2-1. Outdoor Unit
Outdoor Unit CM1972A
Control PCB
Part No.
Controls
Control Circuit Fuse
Compressor
Type
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C))
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Overload Relay
Operation Temp.
Run Capacitor
Crankcase Heater
Pints (cc)
Ohm
Model
Micro F
VAC
CB-CM1972A
Microprocessor
250V 25A
DC Twin Rotary (Hermetic)
5KD240XAB21 / 1,700W
FV50S ... 1.91 (900)
U - V :
0.720
V - W :
W - U :
CS-7L-2515
Open : 239 °F (115 °C), Close : 212 °F (100 °C)
230V 30W
0.708
0.726
Yes
Yes
Yes
-
-
Fan
Type
Q'ty ... Dia. inch (mm)
Fan Motor
Type
Model ... Q'ty
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
Coil Resistance
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Over-Current Protection
Run Capacitor
Heat Exchanger Coil
Coil
Rows
Fins per inch
Face Area
Over-Heat Protection
W
Ohm
Micro F
VAC
2
ft
(m2)
Propeller
1 ... D18-1/8 (D460)
DC Motor
SIC-71FW-D490-1 ... 1
8
750
90
-
Internal Controller
Yes
Yes
-
-
Aluminum Plate Fin / Copper Tube
2
18.1
6.40 (0.595)
External Finish Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
14
Page 17
Outdoor Unit CM2472A
Control PCB
Part No.
Controls
Control Circuit Fuse
Compressor
Type
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C))
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Overload Relay
Run Capacitor
Crankcase Heater
Pints (cc)
Ohm
Model
Operation Temp.
Micro F
VAC
CB-CM2472A
Microprocessor
250V 25A
DC Twin Rotary (Hermetic)
5KD240XAB21 / 1,700W
FV50S ... 1.91 (900)
U - V :
0.720
V - W :
W - U :
0.708
0.726
Yes
Yes
Yes
CS-7L-2515
Open : 239 °F (115 °C), Close : 212 °F (100 °C)
-
-
230V 30W
Fan
Type
Q'ty ... Dia. inch (mm)
Fan Motor
Type
Model ... Q'ty
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
Coil Resistance
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Over-Current Protection
Over-Heat Protection
Run Capacitor
Heat Exchanger Coil
Coil
Rows
Fins per inch
Face Area
W
Ohm
Micro F
VAC
2
ft
(m2)
Propeller
1 ... D18-1/8 (D460)
DC Motor
SIC-71FW-D490-1 ... 1
8
750
90
-
Internal Controller
Yes
Yes
-
-
Aluminum Plate Fin / Copper Tube
2
18.1
6.40 (0.595)
External Finish Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
15
Page 18
Outdoor Unit CM3172A
Control PCB
Part No.
Controls
Control Circuit Fuse
Compressor
Type
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C))
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Overload Relay
Run Capacitor
Crankcase Heater
Pints (cc)
Ohm
Model
Operation Temp.
Micro F
VAC
CB-CM3172A
Microprocessor
250V 25A
DC Twin Rotary (Hermetic)
5JD420XAB22 / 3,000W
FV50S ... 2.55 (1,200)
U - V :
0.435
V - W :
W - U :
0.441
0.452
Yes
Yes
Yes
CS-7L-2515
Open : 239 °F (115 °C), Close : 212 °F (100 °C)
-
-
230V 30W
Fan
Type
Q'ty ... Dia. inch (mm)
Fan Motor
Type
Model ... Q'ty
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
Coil Resistance
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Over-Current Protection
Over-Heat Protection
Run Capacitor
Heat Exchanger Coil
Coil
Rows
Fins per inch
Face Area
W
Ohm
Micro F
VAC
2
ft
(m2)
Propeller
1 ... D18-1/8 (D460)
DC Motor
SIC-71FW-D490-1 ... 1
8
800
90
-
Internal Controller
Yes
Yes
-
-
Aluminum Plate Fin / Copper Tube
2
18.1
7.75 (0.72)
External Finish Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
16
Page 19
2-3. Other Component Specifications
Sensor Name
Outdoor air temp sensor
Outdoor heat exchanger sensor
AW / AN sensor
BW / BN sensor
CW / CN sensor
DW / DN sensor
Model No.
of sensor
TKS295B
TKS292B
TKS292B
TKS292B
TKS292B
TKS292B
40
35
30
25
20
Resistance (k ohm)
15
10
5
Quantity of Sensor
CM1972A CM2472A CM3172A
1
1
1 / 1
1 / 1
1 / 1
0
1
1
1 / 1
1 / 1
1 / 1
1 / 1
1
1
1 / 1
1 / 1
1 / 1
1 / 1
0
Sensor Name
Compressor temp sensor TKS293B
Model No.
of sensor
200
180
160
140
120
100
Resistance (k ohm)
80
60
40
-
4514 23 32 41 50 59 68
(
20)(-15)(-10) (-5) (0) (5) (10) (15) (20)
-
Temperature F ( C)
Quantity of Sensor
CM1972A CM2472A CM3172A
11
1
20
0
32 50 68 86 104 122 140 158 176 194
(0) (10) (20) (30) (40) (50) (60) (70) (80) (90)
Temperature F ( C)
17
Page 20
Wide tube service valve
dia.3/8" (9.52) × 3
Narrow tube service valve
dia.1/4" (6.35) × 3
4-7/16
5-29/32 2-27/32 2-3/4
2-1/32 4-1/2
2-15/16
2-3/4
29-1/8(740)
23/32
1-13/16
35-7/16(900)
23-15/16 5-11/32
15/32
12-19/32(320)
13-19/32
14-17/32
11-17/32
ID:23/32
2-ID:15/16
1-3/8
2-15/16
2-1/16
3. DIMENSIONAL DATA
Outdoor Unit CM1972A
Unit: inch(mm)
(852-0-0010-11500-0)
18
Page 21
Wide tube service valve
dia.1/2" (12.70) × 1
Narrow tube service valve
dia.1/4" (6.35) × 4
Wide tube service valve
dia.3/8" (9.52) × 3
4-7/16
5-29/32 2-27/32 2-3/4
2-3/4
2-1/32 4-1/2
2-15/16
2-3/4 2-3/4
29-1/8(740)
23/32
1-13/16
35-7/16(900)
23-15/16 5-11/32
15/32
12-19/32(320)
13-19/32
14-17/32
11-17/32
ID:23/32
2-ID:15/16
1-3/8
2-15/16
2-1/16
2-13/32
Outdoor Unit CM2472A
Unit: inch(mm)
(852-0-0010-20500-0)
19
Page 22
Wide tube service valve
dia.1/2" (12.70) × 2
Narrow tube service valve
dia.1/4" (6.35) × 4
Wide tube service valve
dia.3/8" (9.52) × 2
4-7/16
5-29/32
2-1/32 4-1/2
2-15/16
2-3/4 2-3/4
35-1/32(890)
23/32
1-13/16
35-7/16(900)
23-15/16 5-11/32
15/32
12-19/32(320)
13-19/32
14-17/32
11-17/32
ID:23/32
2-ID:15/16
1-3/8
2-15/16
2-1/16
2-13/32
Outdoor Unit CM3172A
Unit: inch(mm)
(852-0-0010-20600-0)
2-7/8 2-3/4 2-3/4
20
Page 23
Compressor
High pressure
switch
H.P.
Main
accumulator
Sub
accumulator
Service valve on
narrow tube
Service valve on
wide tube
CN
BN
AN
CW
BW
AW
O.D.1/4"
O.D.1/4"
O.D.1/4"
O.D.3/8"
O.D.3/8"
O.D.3/8"
Heat exchanger
Cooling cycle
Indoor unit Outdoor unit
Strainer Header
Header
M
M
M
Wide tube
Narrow tube
4. REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram
Outdoor Unit CM1972A
Insulation of Refrigerant Tubing
Because capillary tubing is used in the outdoor unit, both the
wide and narrow tubes of this air conditioner become cold. To
prevent heat loss and wet floors due to dripping of
condensation, both tubes must be well insulated with a
proper insulation material. The thickness of the insulation
should be a min.5/16"(8 mm).
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.
Wide tube
Thickness:
Min.5/16"(8 mm)
Insulation
Narrow tube
Thickness:
Min.5/16"(8 mm)
IMPORTANT
CAUTION
Electric
expansion
valve
21
Page 24
Outdoor Unit CM2472A
Insulation of Refrigerant Tubing
Because capillary tubing is used in the outdoor unit, both the
wide and narrow tubes of this air conditioner become cold. To
prevent heat loss and wet floors due to dripping of
condensation, both tubes must be well insulated with a
proper insulation material. The thickness of the insulation
should be a min.5/16"(8 mm).
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.
Wide tube
Thickness:
Min.5/16"(8 mm)
Insulation
Narrow tube
Thickness:
Min.5/16"(8 mm)
IMPORTANT
CAUTION
Service valve on
narrow tube
Electric
expansion
valve
Service valve on
wide tube
DN
CN
BN
AN
DW
CW
BW
AW
O.D.1/4"
O.D.1/4"
O.D.1/4"
O.D.1/4"
O.D.1/2"
O.D.3/8"
O.D.3/8"
O.D.3/8"
Cooling cycle
Strainer Header
Header
M
M
M
M
Indoor unit Outdoor unit
Wide tube
Narrow tube
Compressor
High pressure
switch
H.P.
Main
accumulator
Sub
accumulator
Heat exchanger
22
Page 25
Outdoor Unit CM3172A
Indoor unit Outdoor unit
Service valve on
Wide tube
O.D.1/2"
O.D.1/2"
O.D.3/8"
O.D.3/8"
Narrow tube
O.D.1/4"
O.D.1/4"
O.D.1/4"
O.D.1/4"
wide tube
DW
CW
BW
AW
Service valve on
narrow tube
DN
CN
BN
AN
Header
Electric
expansion
valve
M
M
M
M
Strainer Header
Sub
accumulator
Main
accumulator
High pressure
switch
H.P.
Compressor
Heat exchanger
Cooling cycle
Insulation of Refrigerant Tubing
IMPORTANT
Because capillary tubing is used in the outdoor unit, both the
wide and narrow tubes of this air conditioner become cold. To
prevent heat loss and wet floors due to dripping of
condensation, both tubes must be well insulated with a
proper insulation material. The thickness of the insulation
should be a min.5/16"(8 mm).
After a tube has been insulated,
CAUTION
never try to bend it into a narrow
curve because it can cause the tube
to break or crack.
23
Thickness:
Min.5/16"(8 mm)
Wide tube
Insulation
Thickness:
Min.5/16"(8 mm)
Narrow tube
Page 26
5. PERFORMANCE DATA
5-1. Temperature Charts
5-1-1. Temperature Charts (CM1972A)
Outdoor Unit CM1972A Indoor Unit KMS0772 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
188
(1.3)
psig (MPaG)
174
(1.2)
160
(1.1)
Low pressure at wide tube service valve
146
(1.0)
Lo fanHi fan HH fan
p. 86°F (30°C)
77
(25)
Indoor air tem
86
(30)
Outdoor air temperature °F (°C)
80°F (27°C)
75°F (24°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan HH fan
5
4
Indoor air temp. 86°F (30°C)
86
(30)
80°F (27°C)
75°F (24°C)
95
(35)
3
Operating current (A)
2
77
(25)
Outdoor air temperature °F (°C)
(3) Indoor discharge air performance chart
104
(40)
104
(40)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6t (7.5m). If the tubing length is different, the performance chart will vary.
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
Lo fanHi fan HH fan
Indoor air temp. 86°F (30°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
24
80°F (27°C)
75°F (24°C)
95
(35)
104
(40)
Page 27
Outdoor Unit CM1972A Indoor Unit KMS0972 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
188
(1.3)
psig (MPaG)
174
(1.2)
160
(1.1)
Low pressure at wide tube service valve
146
(1.0)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan
6
5
4
Operating current (A)
3
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
HH fan
HH fan
104
(40)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
86
(30)
Outdoor air temperature °F (°C)
25
80°F (27°C)
75°F (24°C)
95
(35)
HH fan
104
(40)
Page 28
Outdoor Unit CM1972A Indoor Unit KMS1272 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
160
(1.1)
146
(1.0)
Low pressure at wide tube service valve
132
(0.9)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan
6
5
4
Operating current (A)
3
77
(25)
Outdoor air temperature °F (°C)
Indoor air temp. 86°F (30°C)
80°F (27°C
86
(30)
75°F (24°C)
)
95
(35)
HH fan
HH fan
104
(40)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
26
95
(35)
HH fan
104
(40)
Page 29
Outdoor Unit CM1972A Indoor Unit KMS1872 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
160
(1.1)
146
(1.0)
Low pressure at wide tube service valve
132
(0.9)
Lo fanHi fan
77
(25)
Outdoor air temperature °F (°C)
(2) Operating current performance chart
8
Lo fanHi fan
7
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
95
(35)
HH fan
HH fan
104
(40)
6
Operating current (A)
5
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
Indoor discharge air temperature °F (°C)
46.4( 8)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
HH fan
104
(40)
27
Page 30
Outdoor Unit CM1972A Indoor Unit XMS0972 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
160
(1.1)
146
(1.0)
Low pressure at wide tube service valve
132
(0.9)
Lo fanHi fan
77
(25)
Indoor air temp. 86
Indoor air temp. 86°F (30°C)
80
80°F (27°C
75
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
°F (27
F (24
°
)
C)
°
C)
°
95
(35)
F (30
°
(2) Operating current performance chart
6
Lo fanHi fan
5
F (30
°
p. 86
F (24
C)
°
C)
°
p. 86°F (30°C
4
Operating current (A)
3
Indoor air tem
Indoor air tem
F (27
°
80
80°F (27°C)
°
75
75°F (24°C)
HH fan
C)
°
HH fan
C)
°
104
(40)
)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
Lo fanHi fan
77
(25)
Indoor air temp. 86
Indoor air temp. 86°F (30°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
F (30°
°
°
F (27
°
80
80°F (27°C)
F (24
°
75
75°F (24°C)
HH fan
C)
C)
C)
°
104
(40)
28
Page 31
Outdoor Unit CM1972A Indoor Unit XMS1272 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
160
psig (MPaG)
(1.1)
146
(1.0)
132
(0.9)
Low pressure at wide tube service valve
Lo fanHi fan
HH fan
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan
6
5
Indoor air temp. 86°F (30°C)
86
(30)
80°F (27°C)
75°F (24°C)
95
(35)
4
Operating current (A)
3
77
(25)
Outdoor air temperature °F (°C)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Lo fanHi fan
Indoor air te
80°F (27°C)
75°F (24°C)
mp. 86°F (30°
C)
HH fan
HH fan
104
(40)
104
(40)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Indoor discharge air temperature °F (°C)
42.8( 6)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
29
95
(35)
104
(40)
Page 32
Outdoor Unit CM1972A Indoor Unit XS1872 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
160
psig (MPaG)
(1.1)
146
(1.0)
132
(0.9)
Low pressure at wide tube service valve
Lo fanHi fan
HH fan
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
(2) Operating current performance chart
Lo fanHi fan
7
6
5
Operating current (A)
4
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
HH fan
104
(40)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
42.8( 6)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Lo fanHi fan
77
(25)
Indoor air tem
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
p. 86°F (30°C
95
(35)
HH fan
)
104
(40)
30
Page 33
5-1-2. Temperature Charts (CM2472A)
Outdoor Unit CM2472A Indoor Unit KMS0772 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
188
(1.3)
psig (MPaG)
174
(1.2)
160
(1.1)
Low pressure at wide tube service valve
146
(1.0)
Lo fanHi fan HH fan
Indoor air temp. 86°F (30°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
80°F (27°C)
75°F (24°C)
(2) Operating current performance chart
Lo fanHi fan HH fan
5
4
3
Operating current (A)
2
77
(25)
Outdoor air temperature °F (°C)
Indoor air temp. 86°F (30°C)
80°F (27°C
75°F (24°C)
86
(30)
)
(35)
95
(3) Indoor discharge air performance chart
104
(40)
104
(40)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6t (7.5m). If the tubing length is different, the performance chart will vary.
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
Lo fanHi fan HH fan
Indoor air temp. 86°F (30°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
31
80°F (27°C)
75°F (24°C)
95
(35)
104
(40)
Page 34
Outdoor Unit CM2472A Indoor Unit KMS0972 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
188
(1.3)
psig (MPaG)
174
(1.2)
160
(1.1)
Low pressure at wide tube service valve
146
(1.0)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan
6
5
p. 86°F (30°C
4
Operating current (A)
3
77
(25)
Outdoor air temperature °F (°C)
86
(30)
Indoor air tem
80°F (27°C)
75°F (24°C)
95
(35)
HH fan
HH fan
)
104
(40)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
86
(30)
Outdoor air temperature °F (°C)
32
80°F (27°C)
75°F (24°C)
95
(35)
HH fan
104
(40)
Page 35
Outdoor Unit CM2472A Indoor Unit KMS1272 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
160
(1.1)
146
(1.0)
Low pressure at wide tube service valve
132
(0.9)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan
6
5
Indoor air temp. 86°F (30°C)
86
(30)
80°F (27°C)
75°F (24°C)
95
(35)
4
Operating current (A)
3
77
(25)
Outdoor air temperature °F (°C)
HH fan
HH fan
104
(40)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
Lo fanHi fan
77
(25)
Indoor air te
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
33
mp. 86°F (30°
95
(35)
HH fan
C)
104
(40)
Page 36
Outdoor Unit CM2472A Indoor Unit KMS1872 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
160
(1.1)
146
(1.0)
Low pressure at wide tube service valve
132
(0.9)
Lo fanHi fan
77
(25)
Outdoor air temperature °F (°C)
(2) Operating current performance chart
8
Lo fanHi fan
7
Indoor air tem
86
(30)
80°F (27°C)
75°F (24°C)
p. 86°F (30°C)
95
(35)
HH fan
HH fan
104
(40)
6
Operating current (A)
5
77
(25)
Outdoor air temperature °F (°C)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
(35)
95
104
(40)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
Indoor discharge air temperature °F (°C)
46.4( 8)
Lo fanHi fan
77
(25)
Indoor air tem
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
p. 86°F (30°C)
95
(35)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
HH fan
104
(40)
34
Page 37
Outdoor Unit CM2472A Indoor Unit KMS2472 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
160
(1.1)
146
(1.0)
Low pressure at wide tube service valve
132
(0.9)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
86
(30)
Outdoor air temperature °F (°C)
75°F (24°C)
95
(35)
80°F (27°C)
(2) Operating current performance chart
9
Lo fanHi fan
8
7
Operating current (A)
6
Indoor air temp. 86°F (30°C
80°F (27°C)
75°F (24°C)
HH fan
HH fan
)
104
(40)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
Indoor discharge air temperature °F (°C)
46.4( 8)
Lo fanHi fan
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
C)
75°F (24°
86
(30)
Outdoor air temperature °F (°C)
95
(35)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
HH fan
104
(40)
35
Page 38
Outdoor Unit CM2472A Indoor Unit XMS0972 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
160
(1.1)
146
(1.0)
Low pressure at wide tube service valve
132
(0.9)
Lo fanHi fan
77
(25)
Indoor air temp. 86
Indoor air temp. 86°F (30°C)
80
80°F (27°C
75
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
°F (27
F (24
°
)
C)
°
C)
°
95
(35)
F (30
°
(2) Operating current performance chart
6
Lo fanHi fan
5
F (30
°
p. 86
F (24
C)
°
C)
°
p. 86°F (30°C
4
Operating current (A)
3
Indoor air tem
Indoor air tem
F (27
°
80
80°F (27°C)
°
75
75°F (24°C)
HH fan
C)
°
HH fan
C)
°
104
(40)
)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
Lo fanHi fan
77
(25)
Indoor air temp. 86
Indoor air temp. 86°F (30°C)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
F (30
°
°
F (27
°
80
80°F (27°C)
F (24
°
75
75°F (24°C)
HH fan
C)
°
C)
C)
°
104
(40)
36
Page 39
Outdoor Unit CM2472A Indoor Unit XMS1272 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
160
psig (MPaG)
(1.1)
146
(1.0)
132
(0.9)
Low pressure at wide tube service valve
Lo fanHi fan
HH fan
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan
6
5
Indoor air temp. 86°F (30°C)
86
(30)
80°F (27°C)
75°F (24°C)
95
(35)
4
Operating current (A)
3
77
(25)
Outdoor air temperature °F (°C)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Lo fanHi fan
Indoor air te
80°F (27°C)
75°F (24°C)
mp. 86°F (30°
C)
HH fan
HH fan
104
(40)
104
(40)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Indoor discharge air temperature °F (°C)
42.8( 6)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
37
95
(35)
104
(40)
Page 40
Outdoor Unit CM2472A Indoor Unit XS1872 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
160
psig (MPaG)
(1.1)
Lo fanHi fan
HH fan
80°F (27°C)
75°F (24°C)
p. 86°F (30°C)
95
(35)
146
(1.0)
132
(0.9)
Low pressure at wide tube service valve
77
(25)
Indoor air tem
86
(30)
Outdoor air temperature °F (°C)
(2) Operating current performance chart
Lo fanHi fan
7
6
Indoor air temp. 86°F (30°C)
86
(30)
80°F (27°C)
75°F (24°C)
95
(35)
5
Operating current (A)
4
77
(25)
Outdoor air temperature °F (°C)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
Lo fanHi fan
HH fan
HH fan
104
(40)
104
(40)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
42.8( 6)
77
(25)
Outdoor air temperature °F (°C)
86
(30)
Indoor air tem
80°F (27°C)
75°F (24°C)
38
p. 86°F (30°C
95
(35)
)
104
(40)
Page 41
5-1-3. Temperature Charts (CM3172A)
Outdoor Unit CM3172A Indoor Unit KMS0772 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
146
(1.0)
118
(0.8)
Low pressure at wide tube service valve
90
(0.6)
Lo fanHi fan Hi fan HH fan
Indoor air temp. 86°F (30°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
80°F (27°C
(2) Operating current performance chart
5
Lo fanHi fan Hi fan HH fan
4
Indoor air temp. 86°F (30°C)
Operating current (A)
3
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
)
104
(40)
80°F (27°C)
75°F (24°C)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Lo fanHi fan Hi fan HH fan
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
Indoor discharge air temperature °F (°C)
46.4( 8)
77
(25)
Outdoor air temperature °F (°C)
Indoor air temp. 86°F (30°C)
86
(30)
39
80°F (27°C)
75°F (24°C)
95
(35)
104
(40)
Page 42
Outdoor Unit CM3172A Indoor Unit KMS0972 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
146
(1.0)
118
(0.8)
Low pressure at wide tube service valve
90
(0.6)
Lo fanHi fan Hi fan HH fan
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
5
Lo fanHi fan Hi fan HH fan
4
Indoor air temp. 86°F (30°C)
Operating current (A)
3
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
80°F (27°C)
75°F (24°C)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Lo fanHi fan Hi fan HH fan
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
77
(25)
Outdoor air temperature °F (°C)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
40
95
(35)
104
(40)
Page 43
Outdoor Unit CM3172A Indoor Unit KMS1272 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
146
(1.0)
118
(0.8)
Low pressure at wide tube service valve
90
(0.6)
Lo fanHi fan Hi fan HH fan
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
6
Lo fanHi fan Hi fan HH fan
5
Indoor air temp. 86°F (30°C)
4
Operating current (A)
3
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
80°F (27°C)
75°F (24°C)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Lo fanHi fan Hi fan HH fan
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
77
(25)
Outdoor air temperature °F (°C)
Indoor air temp. 86°F (30°C)
86
(30)
41
80°F (27°C)
75°F (24°C)
95
(35)
104
(40)
Page 44
Outdoor Unit CM3172A Indoor Unit KMS1872 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
146
(1.0)
Indoor air temp. 86°F (30°C)
118
(0.8)
Low pressure at wide tube service valve
90
(0.6)
77
(25)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
Lo fanHi fan
95
(35)
(2) Operating current performance chart
9
8
7
6
Operating current (A)
5
4
77
(25)
Outdoor air temperature °F (°C)
80°F (27°C)
Indoor air temp. 86°F (30°C)
75°F (24°C)
86
(30)
Lo fanHi fan
95
(35)
104
(40)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
77
(25)
Indoor air temp. 86°F (30°C)
86
(30)
Outdoor air temperature °F (°C)
42
Lo fanHi fan
80°F (27°C)
75°F (24°C)
95
(35)
104
(40)
Page 45
Outdoor Unit CM3172A Indoor Unit KMS2472 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
146
(1.0)
118
(0.8)
Low pressure at wide tube service valve
90
(0.6)
77
(25)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
Lo fanHi fan
95
(35)
(2) Operating current performance chart
12
11
10
Operating current (A)
9
8
77
(25)
Outdoor air temperature °F (°C)
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C
86
(30)
Lo fanHi fan
)
95
(35)
104
(40)
104
(40)
(3) Indoor discharge air performance chart
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
77
(25)
Outdoor air temperature °F (°C)
Indoor air temp. 86°F (30°C)
86
(30)
43
Lo fanHi fan
80°F (27°C)
75°F (24°C)
95
(35)
104
(40)
Page 46
Outdoor Unit CM3172A Indoor Unit XMS0972 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
146
(1.0)
118
(0.8)
Low pressure at wide tube service valve
(0.6)
Lo fanHi fan Hi fan HH fan
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
90
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan Hi fan HH fan
5
Operating current (A)
4
Indoor air temp. 86°F (30°C)
104
(40)
80°F (27°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
42.8( 6)
Indoor discharge air temperature °F (°C)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Lo fanHi fan Hi fan HH fan
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
44
Page 47
Outdoor Unit CM3172A Indoor Unit XMS1272 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
146
(1.0)
118
(0.8)
Low pressure at wide tube service valve
(0.6)
Lo fanHi fan Hi fan HH fan
Indoor air temp. 86°F (30°C)
80°F (27°C)
75°F (24°C)
90
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
(2) Operating current performance chart
Lo fanHi fan Hi fan HH fan
6
5
Operating current (A)
4
Indoor air temp. 86°F (30°C)
104
(40)
80°F (27°C)
75°F (24°C)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
(3) Indoor discharge air performance chart
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
Indoor discharge air temperature °F (°C)
42.8( 6)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Lo fanHi fan Hi fan HH fan
77
(25)
Indoor air temp. 86°F (30°C)
86
(30)
Outdoor air temperature °F (°C)
80°F (27°C)
75°F (24°C)
95
(35)
104
(40)
45
Page 48
Outdoor Unit CM3172A Indoor Unit XS1872 × 1
Cooling Characteristics
(RH : 46%, Indoor fan speed : High fan)
(230V, 60Hz)
(1) Low pressure performance chart
174
(1.2)
psig (MPaG)
146
(1.0)
Indoor air temp. 86°F (30°C)
118
(0.8)
Low pressure at wide tube service valve
90
(0.6)
77
(25)
80°F (27°C)
75°F (24°C)
86
(30)
Outdoor air temperature °F (°C)
Lo fanHi fan
95
(35)
(2) Operating current performance chart
9
8
7
6
Operating current (A)
5
80°F (27°C)
Indoor air temp. 86°F (30°C
75°F (24°C)
Lo fanHi fan
)
104
(40)
77
(25)
86
(30)
Outdoor air temperature °F (°C)
95
(35)
104
(40)
(3) Indoor discharge air performance chart
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
46.4( 8)
42.8( 6)
39.2( 4)
Indoor discharge air temperature °F (°C)
77
(25)
Indoor air temp. 86°F (30°C)
86
(30)
Outdoor air temperature °F (°C)
NOTE
• This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on
the indoor unit type.
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
(In this case, be sure to stop all the indoor units where performance is not being checked.)
• The performance is for a tubing length of 24.6ft (7.5m). If the tubing length is different, the performance chart will vary.
Lo fanHi fan
80°F (27°C)
75°F (24°C)
95
(35)
104
(40)
46
Page 49
Outdoor Unit : CM1972A
Indoor Unit : KMS0972 × 3
Power Supply : 230V Single Phase 60Hz
< Cooling Capacity >
5-2. Cooling Capacity
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#)
: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) D.B. / 67 °F (19.4 °C) W.B.
: Outdoor Ambient Temp. 95 °F (35 °C) D.B.
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
NOTE
RATING CAPACITY: 19,700 BTU/h AIR FLOW RATE: 883 CFM
INDOOR OUTDOOR
ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C)
W.B. D.B. 65 75 85 95 105 115
(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)
TC 19,800 19,100 18,350 17,770 16,890 15,940
72 (22.2) SHC 17,470 17,130 16,790 16,610 16,270 15,760
59 76 (24.4) SHC 19,800 19,100 18,350 17,770 16,890 15,940
(15.0) 80 (26.7) SHC 19,800 19,100 18,350 17,770 16,890 15,940
84 (28.9) SHC 19,800 19,100 18,350 17,770 16,890 15,940
88 (31.1) SHC 19,800 19,100 18,350 17,770 16,890 15,940
TC 20,790 20,060 19,290 18,720 17,800 16,820
72 (22.2) SHC 14,210 13,870 13,530 13,360 13,010 12,670
63 76 (24.4) SHC 17,130 16,960 16,610 16,270 15,930 15,590
(17.2) 80 (26.7) SHC 20,390 20,040 19,290 18,720 17,800 16,820
84 (28.9) SHC 20,790 20,060 19,290 18,720 17,800 16,820
88 (31.1) SHC 20,790 20,060 19,290 18,720 17,800 16,820
TC 21,790 21,050 20,240 # 19,700 18,750 17,720
72 (22.2) SHC 10,960 10,610 10,270 10,100 9,760 9,410
67 76 (24.4) SHC 13,870 13,700 13,360 13,190 12,840 12,330
(19.4) 80 (26.7) SHC 16,960 16,790 16,440 16,270 15,930 15,590
84 (28.9) SHC 20,040 19,700 19,360 19,190 18,750 17,720
88 (31.1) SHC 21,790 21,050 20,240 19,700 18,750 17,720
TC 22,800 22,040 21,210 20,700 19,720 18,470
72 (22.2) SHC 7,360 7,190 6,840 6,670 6,330 5,980
71 76 (24.4) SHC 10,440 10,100 9,930 9,760 9,410 8,900
(21.7) 80 (26.7) SHC 13,530 13,190 13,010 12,840 12,500 11,990
84 (28.9) SHC 16,440 16,270 15,930 15,760 15,410 15,070
88 (31.1) SHC 19,530 19,190 19,010 18,840 18,500 17,990
TC 23,690 22,920 22,080 21,600 20,590 18,950
75 76 (24.4) SHC 7,010 6,840 6,500 6,330 6,160 5,640
(23.9) 80 (26.7) SHC 10,100 9,930 9,590 9,410 9,240 8,730
84 (28.9) SHC 13,190 12,840 12,670 12,500 12,160 11,640
88 (31.1) SHC 16,100 15,930 15,590 15,410 15,070 14,730
47
Page 50
Outdoor Unit : CM1972A
Indoor Unit : XMS1272 × 3
Power Supply : 230V Single Phase 60Hz
< Cooling Capacity >
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#)
: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) D.B. / 67 °F (19.4 °C) W.B.
: Outdoor Ambient Temp. 95 °F (35 °C) D.B.
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
NOTE
RATING CAPACITY: 18,300 BTU/h A IR FLOW RATE: 706 CFM
ROODTUOROODNI
ENT. TEMP.
o
F (
o
.PMET TNEIBMA)C
o
F (oC)
W.B. D.B. 65 75 85 95 105115
(18.3)(23.9)(29.4) (35.0) (40.6)(46.1)
TC 18,380 17,78017,130 16,61015,83014,990
CI
0.86 1.06 1.26 1.40 1.61 1.81
72 (22.2) SHC 15,860 15,590 15,310 15,040 14,77014,350
59 76 (24.4) SHC 18,380 17,78017,130 16,610 15,83014,990
(15.0) 80 (26.7) SHC 18,380 17,78017,130 16,610 15,83014,990
84 (28.9) SHC 18,380 17,780 17,130 16,610 15,83014,990
88 (31.1) SHC 18,380 17,780 17,130 16,610 15,83014,990
TC 19,230 18,62017,950 17,450 16,64015,780
CI 0.86 1.07 1.28 1.42 1.63 1.85
72 (22.2) SHC 12,980 12,710 12,430 12,16011,890 11,470
63 76 (24.4) SHC 15,590 15,31015,040 14,770 14,49014,080
(17.2) 80 (26.7) SHC 18,330 18,06017,780 17,450 16,64015,780
84 (28.9) SHC 19,230 18,620 17,950 17,450 16,64015,780
88 (31.1) SHC 19,230 18,620 17,950 17,450 16,64015,780
TC 20,090 19,46018,780 #18,30017,480 16,580
CI
0.86 1.08 1.29 1.44 1.66 1.88
72 (22.2) SHC 9,970 9,8309,550 9,280 9,000 8,730
67 76 (24.4) SHC 12,570 12,43012,160 11,890 11,610 11,340
(19.4) 80 (26.7) SHC 15,310 15,04014,900 14,630 14,35014,080
84 (28.9) SHC 17,920 17,650 17,510 17,230 16,96016,580
88 (31.1) SHC 20,090 19,460 18,780 18,300 17,48016,580
TC 20,930 20,30019,610 19,160 18,32017,100
CI
0.86 1.09 1.31 1.45 1.69 1.89
72 (22.2) SHC 6,950 6,6706,400 6,260 5,990 5,580
71 76 (24.4) SHC 9,5509,280 9,0008,870 8,5908,180
(21.7) 80 (26.7) SHC 12,300 12,02011,750 11 ,610 11 ,340 10,930
84 (28.9) SHC 14,900 14,630 14,350 14,220 13,94013,530
88 (31.1) SHC 17,510 17,230 16,960 16,820 16,55016,140
TC 21,660 21,03020,330 19,930 19,08017,510
CI
0.87 1.10 1.34 1.47 1.72 1.89
75 76 (24.4) SHC 6,5406,260 6,1205,990 5,7105,300
(23.9) 80 (26.7) SHC 9,2809,000 8,8708,730 8,4608,040
84 (28.9) SHC 11,89011,61011,47011,340 11 ,060 10,510
88 (31.1) SHC 14,490 14,220 14,080 13,940 13,67013,120
48
Page 51
Outdoor Unit : CM2472A
Indoor Unit : KMS0972 × 3
Power Supply : 230V Single Phase 60Hz
< Cooling Capacity >
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#)
: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) D.B. / 67 °F (19.4 °C) W.B.
: Outdoor Ambient Temp. 95 °F (35 °C) D.B.
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
NOTE
RATING CAPACITY: 25,400 BTU/h AIR FLOW RATE: 883 CFM
INDOOR OUTDOOR
ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C)
W.B. D.B. 65 75 85 95 105 115
(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)
TC 25,690 24,800 23,840 23,190 22,040 17,290
72 (22.2) SHC 20,210 19,870 19,360 19,010 18,500 16,440
59 76 (24.4) SHC 23,130 22,790 22,270 22,100 21,410 17,290
(15.0) 80 (26.7) SHC 25,690 24,800 23,840 23,190 22,040 17,290
84 (28.9) SHC 25,690 24,800 23,840 23,190 22,040 17,290
88 (31.1) SHC 25,690 24,800 23,840 23,190 22,040 17,290
TC 26,810 25,900 24,910 24,290 23,110 17,700
72 (22.2) SHC 16,790 16,440 15,930 15,760 15,240 13,010
63 76 (24.4) SHC 19,700 19,360 19,010 18,670 18,160 15,930
(17.2) 80 (26.7) SHC 22,960 22,440 22,100 21,760 21,240 17,700
84 (28.9) SHC 25,870 25,530 24,910 24,290 23,110 17,700
88 (31.1) SHC 26,810 25,900 24,910 24,290 23,110 17,700
TC 27,910 26,980 25,970 # 25,400 24,180 18,070
72 (22.2) SHC 13,360 13,010 12,500 12,330 11,810 9,590
67 76 (24.4) SHC 16,270 15,930 15,590 15,240 14,900 12,500
(19.4) 80 (26.7) SHC 19,360 19,010 18,670 18,330 17,990 15,590
84 (28.9) SHC 22,440 22,100 21,590 21,410 20,900 18,070
88 (31.1) SHC 25,360 25,020 24,670 24,330 23,810 18,070
TC 28,980 28,030 26,990 26,500 25,010 18,380
72 (22.2) SHC 9,590 9,240 8,900 8,730 8,210 5,980
71 76 (24.4) SHC 12,670 12,330 11,810 11,640 11,130 8,900
(21.7) 80 (26.7) SHC 15,760 15,410 15,070 14,730 14,210 11,990
84 (28.9) SHC 18,670 18,330 17,990 17,810 17,300 15,070
88 (31.1) SHC 21,590 21,240 20,900 20,730 20,210 17,990
TC 29,880 28,920 27,870 27,460 25,330 18,590
75 76 (24.4) SHC 9,070 8,730 8,390 8,210 7,530 5,470
(23.9) 80 (26.7) SHC 12,160 11,810 11,470 11,300 10,610 8,560
84 (28.9) SHC 15,070 14,730 14,390 14,390 13,700 11,640
88 (31.1) SHC 18,160 17,810 17,470 17,300 16,610 14,560
49
Page 52
Outdoor Unit : CM2472A
Indoor Unit : XS1872 + XMS1272 + XMS1272
Power Supply : 230V Single Phase 60Hz
< Cooling Capacity >
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#)
: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) D.B. / 67 °F (19.4 °C) W.B.
: Outdoor Ambient Temp. 95 °F (35 °C) D.B.
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
NOTE
RATING CAPACITY: 24,800 BTU/h A IR FLOW RATE:812 CFM
ROODTUOROODNI
ENT. TEMP.
o
F (
o
.PMET TNEIBMA)C
o
F (oC)
W.B. D.B. 65 75 85 95 105115
(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)
TC 25,12024,280 23,37022,760 18,30013,500
CI
1.55 1.85 2.15 2.32 2.19 1.88
72 (22.2) SHC19,99019,520 19,040 18,89016,840 13,500
59 76 (24.4) SHC 22,830 22,51022,040 21,73018,30013,500
(15.0) 80 (26.7) SHC 25,120 24,28023,370 22,76018,30013,500
84 (28.9) SHC25,12024,280 23,370 22,76018,300 13,500
88 (31.1) SHC25,12024,280 23,370 22,76018,300 13,500
TC 26,140 25,290 24,35023,780 18,700 13,780
CI
1.58 1.89 2.20 2.37 2.19 1.88
72 (22.2) SHC16,52016,210 15,730 15,57013,37011,470
63 76 (24.4) SHC 19,520 19,04018,730 18,41016,36013,780
(17.2) 80 (26.7) SHC 22,510 22,20021,730 21,57018,70013,780
84 (28.9) SHC25,51025,040 24,350 23,78018,700 13,780
88 (31.1) SHC26,14025,290 24,350 23,78018,700 13,780
TC 27,130 26,270 25,310#24,800 19,05014,010
CI
1.62 1.94 2.26 2.42 2.19 1.88
72 (22.2) SHC13,05012,740 12,260 12,1009,900 8,160
67 76 (24.4) SHC 16,050 15,73015,260 15,10012,89011,160
(19.4) 80 (26.7) SHC 19,040 18,73018,410 18,10016,05014,010
84 (28.9) SHC22,04021,730 21,250 21,10018,890 14,010
88 (31.1) SHC25,04024,570 24,250 24,09019,050 14,010
TC 28,070 27,200 26,23025,790 19,330 14,190
CI
1.67 2.00 2.33 2.48 2.19 1.88
72 (22.2) SHC 9,4209,110 8,790 8,6306,430 4,690
71 76 (24.4) SHC 12,26011,950 11,630 11,470 9,270 7,690
(21.7) 80 (26.7) SHC 15,420 15,10014,790 14,63012,42010,690
84 (28.9) SHC18,41018,100 17,630 17,47015,260 13,680
88 (31.1) SHC21,25020,940 20,620 20,46018,260 14,190
TC 28,840 27,970 26,99026,290 19,480 14,290
CI
1.72 2.06 2.41 2.51 2.19 1.88
75 76 (24.4) SHC 8,790 8,4808,160 8,0005,8004,380
(23.9) 80 (26.7) SHC 11,790 11,630 11,320 11,000 8,950 7,370
84 (28.9) SHC14,79014,470 14,160 14,00011,950 10,370
88 (31.1) SHC17,78017,470 17,150 16,99014,790 13,370
50
Page 53
Outdoor Unit : CM3172A
Indoor Unit : KMS0972 × 4
Power Supply : 230V Single Phase 60Hz
< Cooling Capacity >
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#)
: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) D.B. / 67 °F (19.4 °C) W.B.
: Outdoor Ambient Temp. 95 °F (35 °C) D.B.
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
NOTE
RATING CAPACITY: 30,600 BTU/h AIR FLOW RATE: 1,177 CFM
INDOOR OUTDOOR
ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C)
W.B. D.B. 65 75 85 95 105 115
(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)
TC 31,170 30,000 28,730 28,010 22,960 16,690
72 (22.2) SHC 25,580 24,900 24,440 23,980 21,700 16,690
59 76 (24.4) SHC 29,470 29,010 28,320 28,010 22,960 16,690
(15.0) 80 (26.7) SHC 31,170 30,000 28,730 28,010 22,960 16,690
84 (28.9) SHC 31,170 30,000 28,730 28,010 22,960 16,690
88 (31.1) SHC 31,170 30,000 28,730 28,010 22,960 16,690
TC 32,490 31,280 29,960 29,310 23,400 16,970
72 (22.2) SHC 21,010 20,550 19,870 19,640 17,120 14,610
63 76 (24.4) SHC 24,900 24,440 23,980 23,520 21,240 16,970
(17.2) 80 (26.7) SHC 29,010 28,550 28,100 27,640 23,400 16,970
84 (28.9) SHC 32,490 31,280 29,960 29,310 23,400 16,970
88 (31.1) SHC 32,490 31,280 29,960 29,310 23,400 16,970
TC 33,790 32,540 31,170 # 30,600 23,770 17,200
72 (22.2) SHC 16,440 15,980 15,290 15,070 12,550 10,270
67 76 (24.4) SHC 20,320 19,870 19,410 19,180 16,670 14,150
(19.4) 80 (26.7) SHC 24,440 23,980 23,520 23,300 20,780 17,200
84 (28.9) SHC 28,550 28,100 27,410 27,180 23,770 17,200
88 (31.1) SHC 32,440 31,980 31,170 30,600 23,770 17,200
TC 35,020 33,730 32,320 31,860 24,020 17,350
72 (22.2) SHC 11,410 10,950 10,490 10,490 7,750 5,690
71 76 (24.4) SHC 15,520 15,070 14,610 14,380 11,640 9,580
(21.7) 80 (26.7) SHC 19,640 19,180 18,720 18,500 15,980 13,690
84 (28.9) SHC 23,520 23,070 22,610 22,610 19,870 17,350
88 (31.1) SHC 27,640 27,180 26,720 26,500 23,750 17,350
TC 36,040 34,730 33,270 32,940 24,130 17,390
75 76 (24.4) SHC 10,720 10,270 9,810 9,810 7,070 5,240
(23.9) 80 (26.7) SHC 14,840 14,610 14,150 13,920 11,180 9,350
84 (28.9) SHC 18,950 18,500 18,040 17,810 15,290 13,240
88 (31.1) SHC 22,840 22,380 21,920 21,920 19,180 17,350
51
Page 54
Outdoor Unit : CM3172A
Indoor Unit : XMS0972 × 4
Power Supply : 230V Single Phase 60Hz
< Cooling Capacity >
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#)
: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) D.B. / 67 °F (19.4 °C) W.B.
: Outdoor Ambient Temp. 95 °F (35 °C) D.B.
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
NOTE
RATING CAPACITY: 28,600 BTU/h A IR FLOW RATE:883 CFM
ROODTUOROODNI
ENT. TEMP.
o
F (
o
.PMET TNEIBMA)C
o
F (oC)
W.B. D.B. 65 75 85 95 105115
(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)
TC 29,10028,130 27,06026,410 21,68015,790
CI
1.73 2.04 2.35 2.51 2.43 2.05
72 (22.2) SHC22,73022,210 21,700 21,53019,300 15,790
59 76 (24.4) SHC 25,980 25,47024,960 24,78021,68015,790
(15.0) 80 (26.7) SHC 29,100 28,13027,060 26,41021,68015,790
84 (28.9) SHC29,10028,130 27,060 26,41021,680 15,790
88 (31.1) SHC29,10028,130 27,060 26,41021,680 15,790
TC 30,180 29,200 28,110 27,520 22,030 16,020
CI
1.78 2.10 2.43 2.58 2.43 2.05
72 (22.2) SHC18,78018,440 17,930 17,76015,360 12,960
63 76 (24.4) SHC 22,210 21,70021,180 21,01018,61016,020
(17.2) 80 (26.7) SHC 25,640 25,13024,610 24,44022,03016,020
84 (28.9) SHC28,90028,390 27,870 27,52022,030 16,020
88 (31.1) SHC30,18029,200 28,110 27,52022,030 16,020
TC 31,220 30,220 29,110 #28,600 22,29016,190
CI
1.83 2.17 2.51 2.65 2.43 2.05
72 (22.2) SHC15,01014,500 14,160 13,81011,4109,360
67 76 (24.4) SHC 18,270 17,76017,410 17,24014,67012,610
(19.4) 80 (26.7) SHC 21,700 21,18020,840 20,67018,10016,040
84 (28.9) SHC24,96024,440 24,100 23,93021,530 16,190
88 (31.1) SHC28,21027,870 27,360 27,18022,290 16,190
TC 32,170 31,160 30,03029,630 22,450 16,280
CI
1.90 2.25 2.60 2.73 2.43 2.05
72 (22.2) SHC10,73010,380 10,040 9,870 7,300 5,410
71 76 (24.4) SHC 13,980 13,64013,300 13,13010,7308,670
(21.7) 80 (26.7) SHC 17,410 17,07016,730 16,56014,16012,100
84 (28.9) SHC20,84020,330 19,980 19,81017,410 15,360
88 (31.1) SHC24,10023,760 23,240 23,07020,670 16,280
TC 32,910 31,900 30,76030,490 22,460 16,280
CI
1.98 2.33 2.69 2.81 2.43 2.05
75 76 (24.4) SHC 10,0409,700 9,360 9,1806,780 4,900
(23.9) 80 (26.7) SHC 13,470 13,13012,780 12,61010,2108,330
84 (28.9) SHC16,73016,380 16,040 15,87013,47011,580
88 (31.1) SHC19,98019,640 19,300 19,30016,730 14,840
52
Page 55
6. ELECTRICAL DATA
6-1. Electric Wiring Diagrams
Outdoor Unit CM1972A
BLK
REACTANCE
WHT
1 1
1 1
(1P)CONNECTOR
1
RELAY
6
GRN/YEL
WHT
WHT
WHT
(1P)
CONNECTOR
4
1
1
2
2
WHT
WHT
WHT
BLK
5
BLK
GRN/YEL
WHT
WHT
CRANKCASE
BN THERMISTOR
YEL
YEL
YEL
YEL
BW THERMISTOR
AN THERMISTOR
YEL
YEL
YEL
YEL
AW THERMISTOR
THERMISTOR
OUTDOOR
BLK
BLK
YEL
YEL
THERMISTOR
COIL
L1
BLK
1
TERMINAL PLATE
W
ACIN1
W
E
WW
E1
WHT
WHT
W
L2 L1
(2P)CONNECTOR
W
HEATER0
W
HEATER1
HEATER
4
4
3
3
B-TH
2
2
1
1
4
4
3
3
A-TH
2
2
1
1
4
4
3
3
2
2
1
1
COIL/OUTDOOR
BLK
BLK
THERMISTOR
COMPRESSOR
1
1
SUPPLY
POWER
L2
2
WHT
W
25A
COMP
2 2
GND
CORE
FERRITE
ACIN2
CONTROLLER
U
WVWWW
WHT
W
SI-A
SICOM2
UNIT
A INDOOR
123456789
BLK
WHT
BLU
RED
WHT
BLK
WHT
BLK
BLU
RED
WHT
BLK
BLU
RED
WHT
BLK
BLU
RED
WHT
BLK
ORG
WHT
BRN
BLU
RED
GRY
BLK
YEL
RED
ORG
GRY
BLK
YEL
RED
ORG
WHT
7
6
5
4
3
2
1
BLU
5
4
3
2
1
5
4
3
2
1
W
4
4
3
3
2
2
1
1
6
6
5
5
4
4
3
3
2
2
1
1
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
1 2 3 4 5 6 7
CORE
FERRITE
3
2
1
BLK
5
4
3
2
1
5
4
3
2
1
CN01
CN02
CN03
TERMINAL PLATE
RED
W
SI-B
5
5
4
4
3
3
MV0
2
2
1
1
5
5
4
4
3
3
MV1
2
2
1
1
W
4
3
KS10
2
1
6
5
4
KS22
3
2
1
8
7
6
5
KS23FM
4
3
2
1
7
6
5
4
3
2
1
BLU
WHT
RED (PNK)
TO INDOOR UNIT
UNIT
UNIT
B INDOOR
BLK
WHT
WHT
MV0
MAGNETIC COIL
MV1
MAGNETIC COIL
W
SI-C
SICOM2
GRY
5
5
BLK
4
4
YEL
3
3
MV2C-TH
RED
2
2
ORG
1
1
4
4
EXPANSION BOARD
3
3
2
2
1
1
(7P)CONNECTOR
ORG
WHT
BRN
FM
BLU
RED
WHT
3
2
1
FAN MOTOR
BLU
WHT
RED (PNK)
(3P)CONNECTOR
C INDOOR
GND
BRN
WHT
5
5
4
4
3
3
MV2
2
2
1
1
MAGNETIC COIL
BLK
11
22
YEL
YEL
YEL
YEL
R/V
CN THERMISTOR
11
22
(2P)CONNECTOR
CW THERMISTOR
BLK
BLK
SWITCH
HIGH PRESSURE
CM
MOTOR
S/U C/W
COMPRESSOR
RED
(2P)CONNECTOR
WHT WHT
WHT WHT
OVERLOAD
RELAY(OLR)
8FA2-5257-59400-1
53
Page 56
Outdoor Unit CM2472A
BLK
REACTANCE
WHT
1 1
1 1
(1P)CONNECTOR
1
RELAY
6
GRN/YEL
WHT
WHT
WHT
(1P)
CONNECTOR
4
BLK
5
BLK
1
1
2
2
WHT
WHT
WHT
WHT
WHT
CRANKCASE
BN THERMISTOR
YEL
YEL
YEL
YEL
BW THERMISTOR
AN THERMISTOR
YEL
YEL
YEL
YEL
AW THERMISTOR
THERMISTOR
OUTDOOR
BLK
BLK
YEL
YEL
THERMISTOR
COIL
L1
BLK
1
TERMINAL PLATE
W
ACIN1
WW
E
GRN/YEL
W
E1
WHT
WHT
W
L2 L1
(2P)CONNECTOR
W
HEATER0
W
HEATER1
HEATER
4
4
3
3
B-TH
2
2
1
1
4
4
3
3
A-TH
2
2
1
1
4
4
3
3
2
2
1
1
COIL/OUTDOOR
BLK
BLK
THERMISTOR
COMPRESSOR
1
1
SUPPLY
POWER
L2
2
WHT
W
25A
COMP
2 2
GND
WHT
CORE
FERRITE
ACIN2
CONTROLLER
U
WVWWW
W
SI-A
W
SI-B
5
4
3
MV0
2
1
5
4
3
MV1
2
1
W
SICOM2
4
3
KS10
2
1
6
5
4
KS22
3
2
1
8
7
6
5
KS23FM
4
3
2
1
7
6
5
4
3
2
1
BLU
UNIT
UNIT
A INDOOR
123456789
BLK
BLK
GRY
BLK
YEL
RED
ORG
GRY
BLK
YEL
RED
ORG
WHT
BLU
5
5
4
4
3
3
MV0
2
2
1
1
5
5
4
4
3
3
MV1
2
2
1
1
W
SI-C
W
SICOM2
W
SI-D
4
4
3
3
CN01
2
2
MV2C-TH
1
1
6
6
5
5
4
4
MV3
CN02
3
3
2
2
1
1
TERMINAL PLATE
RED
5
4
3
2
1
5
4
3
2
1
WHT
BLU
RED
WHT
BLK
WHT
BLK
BLU
RED
WHT
BLK
EXPANSION BOARD
BLU
8
8
RED
7
7
WHT
6
6
BLK
5
5
BLU
CN03
4
4
RED
3
3
WHT
BLK
WHT
ORG
7
WHT
6
BRN
5
BLU
4
3
2
RED
1
WHT
RED (PNK)
2
2
1
1
1 2 3 4 5 6 7
CORE
FERRITE
(7P)CONNECTOR
ORG
WHT
BRN
BLU
RED
WHT
3
3
2
2
1
1
D-TH
(3P)CONNECTOR
TO INDOOR UNIT
UNIT
B INDOOR
BLK
WHT
MAGNETIC COIL
MAGNETIC COIL
GRY
5
5
BLK
4
4
YEL
3
3
RED
2
2
ORG
1
1
GRY
5
5
BLK
4
4
YEL
3
3
RED
2
2
ORG
1
1
4
4
3
3
2
2
1
1
4
4
3
3
2
2
1
1
FM
FAN MOTOR
BLU
WHT
RED (PNK)
C INDOOR
101112
BRN
5
5
4
4
3
3
2
2
1
1
5
5
4
4
3
3
2
2
1
1
YEL
YEL
YEL
YEL
YEL
YEL
YEL
YEL
R/V
CM
S/U C/W
UNIT
D INDOOR
GND
WHT
GRY
MV2
MAGNETIC COIL
BLK
MV3
CN THERMISTOR
MAGNETIC COIL
(2P)CONNECTOR
CW THERMISTOR
DN THERMISTOR
DW THERMISTOR
BLK
BLK
SWITCH
HIGH PRESSURE
MOTOR
COMPRESSOR
WHT
11
22
11
22
(2P)CONNECTOR
WHT WHT
WHT WHT
OVERLOAD
RELAY(OLR)
RED
8FA2-5257-59600-1
54
Page 57
Outdoor Unit CM3172A
BLK
CORE
REACTANCE
WHT
1 1
1 1
(1P)CONNECTOR
1
RELAY
6
FERRITE
WHT
WHT
WHT
(1P)
CONNECTOR
4
BLK
5
BLK
GRN/YEL
GRN/YEL
1
1
2
2
WHT
WHT
WHT
WHT
WHT
CRANKCASE
BN THERMISTOR
YEL
YEL
YEL
YEL
BW THERMISTOR
AN THERMISTOR
YEL
YEL
YEL
YEL
AW THERMISTOR
THERMISTOR
OUTDOOR
BLK
BLK
YEL
YEL
THERMISTOR
COIL
L1
BLK
1
TERMINAL PLATE
W
ACIN1
WW
E
W
E1
WHT
WHT
W
L2 L1
(2P)CONNECTOR
W
HEATER0
W
HEATER1
HEATER
4
4
3
3
B-TH
2
2
1
1
4
4
3
3
A-TH
2
2
1
1
4
4
3
3
2
2
1
1
COIL/OUTDOOR
1
1
BLK
BLK
THERMISTOR
COMPRESSOR
SUPPLY
POWER
L2
2
WHT
W
25A
COMP
2 2
GND
WHT
ACIN2
W
W
SI-A
SI-B
5
4
3
MV0
2
1
5
4
3
MV1
2
1
W
SICOM2
4
3
KS10
2
1
6
KS22
KS23FM
5
4
3
2
1
8
7
6
5
4
3
2
1
7
6
5
4
3
2
1
BLU
CONTROLLER
U
WVWWW
UNIT
UNIT
A INDOOR
123456789
BLK
BLK
GRY
BLK
YEL
RED
ORG
GRY
BLK
YEL
RED
ORG
WHT
BLU
5
5
4
4
3
3
MV0
2
2
1
1
5
5
4
4
3
3
MV1
2
2
1
1
W
SI-C
W
SICOM2
W
SI-D
4
4
3
3
CN01
2
2
MV2C-TH
1
1
6
6
5
5
4
4
MV3
CN02
3
3
2
2
1
1
TERMINAL PLATE
RED
5
4
3
2
1
5
4
3
2
1
WHT
BLU
RED
WHT
BLK
WHT
BLK
BLU
RED
WHT
BLK
EXPANSION BOARD
BLU
8
8
RED
7
7
WHT
6
6
BLK
5
5
BLU
CN03
4
4
RED
3
3
BLK
ORG
WHT
BRN
BLU
RED
WHT
RED (PNK)
WHT
WHT
7
6
5
4
3
2
1
2
2
1
1
1 2 3 4 5 6 7
CORE
FERRITE
(7P)CONNECTOR
ORG
WHT
BRN
BLU
RED
WHT
3
3
2
2
1
1
D-TH
(3P)CONNECTOR
TO INDOOR UNIT
UNIT
B INDOOR
BLK
WHT
MAGNETIC COIL
MAGNETIC COIL
GRY
5
5
BLK
4
4
YEL
3
3
RED
2
2
ORG
1
1
GRY
5
5
BLK
4
4
YEL
3
3
RED
2
2
ORG
1
1
4
4
3
3
2
2
1
1
4
4
3
3
2
2
1
1
FM
FAN MOTOR
BLU
WHT
RED (PNK)
C INDOOR
101112
BRN
5
5
4
4
3
3
2
2
1
1
5
5
4
4
3
3
2
2
1
1
YEL
YEL
YEL
YEL
YEL
YEL
YEL
YEL
R/V
CM
S/U C/W
UNIT
D INDOOR
GND
WHT
GRY
MV2
MAGNETIC COIL
BLK
MV3
CN THERMISTOR
MAGNETIC COIL
(2P)CONNECTOR
CW THERMISTOR
DN THERMISTOR
DW THERMISTOR
BLK
BLK
SWITCH
HIGH PRESSURE
MOTOR
COMPRESSOR
WHT
11
22
11
22
(2P)CONNECTOR
WHT WHT
WHT WHT
OVERLOAD
RELAY(OLR)
RED
8FA2-5257-89500-1
55
Page 58
7. FUNCTIONS
7-1. Explanation of Functions
NOTE
The numerical values such as temperature, frequency, time and current in parentheses are an example
of CM3172A and the values are different from the other models.
INITIAL
Control/conditions
Breaker is ON. Power is supplied to the indoor and outdoor unit
The ON/OFF operation
button on the remote
controller is pressed.
If automatic operation mode has been selected
with the remote controller, operation begins in
SENSOR DRY, or COOL mode depending
on the room temperature and
outdoor temperature at the time operation starts.
Depending on the operational mode, refer to the SENSOR DRY, or COOL item.
Unit operation Explanation
control circuits, however the unit remains stopped.
Positioning of the outdoor unit electric expansion
valve is performed.
This applies in the case of automatic
COOL operation.
56
Page 59
Control/conditions
Unit operation Explanation
COOL
The ON/OFF operation
button on the remote
controller is pressed.
The room temperature
has reached the
desired temperature.
The thermostat turns
OFF.
The thermostat turns
ON again.
The operation lamp illuminates.
The indoor fan operates at the set fan speed.
The outdoor unit stops.
The outdoor unit starts.
(Compressor and the outdoor fan start.)
When the frequency reaches Hz,
frequency increases are stopped for a period
of seconds. (Refer to Table 1.)
The frequency then increases.
The indoor temperature and the desired
temperature are approximately equal.
After the thermostat turns ON again, the
outdoor unit will not operate for 3 minutes,
even if the room temperature increases
above the desired temperature.
The outdoor unit does not operate for 3 minutes
even after the breaker is turned ON.
The frequency is increased at the rate of 0.5
Hz every 1 seconds.
This is in order to stabilize the return of oil to the
compressor.
If the indoor and outdoor temperatures are high,
the current peak cut-off activates, stopping
any increases in frequency.
Operating frequency is stabilized in order to
maintain a comfortable environment.
The outdoor unit stops. (It does not stop if the
thermostart for another indoor unit is ON.)
After 3 minutes, the outdoor unit begins operating
automatically.
During these 3 minutes, a pressure balance is
achieved, allowing the compressor to start
more easily.
Freeze prevention In order to protect against freezing, the
Stop All indicator lamps turn OFF. The indoor and
Operation is restarted
within 4 hours (only when
AUTO mode is selected
with the remote
controller).
Operation starts after 4
hours or more have
passed.
When the temperature of the indoor heat
exchanger drops to approximately 35.6 °F
or below, the compressor turns OFF, the
outdoor fan turns OFF, and the indoor fan
continues operating with no changes.
Approximately 3 minutes later, if the
temperature of the indoor heat exchanger
is adove 46.4 °F, the system returns to its
original conditions.
outdoor units stop.
Starts operating in the same operating mode
(COOL) and with the same temperature
settings as before operation was stopped.
New operating mode is determined based on
the temperature conditions at the time the
ON/OFF operation button is pressed.
compressor stops temporarily, until the
temperature of the indoor heat exchanger has
risen.
Within 4 hours after operation was stopped, it is
assumed that there has been no significant
change in the indoor and outdoor temperatures,
and the previous conditions (COOL) are stored.
Frequency control
(Hz)
Outdoor air temperature is below 32 °F.
(senconds)
Outdoor air temperature is 32 °F or higher.
(25) Hz
(35) Hz
(45) Hz
(55) Hz
(120) seconds
(60) seconds
(60) seconds
(180) seconds
Table 1
57
(60) seconds
(30) seconds
(30) seconds
(90) seconds
Page 60
(1/f fluctuation fan)
SENSOR
DRY
Control/conditions
The ON/OFF operation
button on the remote
controller is pressed.
The room temperature
reaches the desired
temperature, and there
is no need for further
cooling.
The room temperature is
59 °F or higher, and is
slightly too cold.
Unit operation Explanation
The operation lamp illuminates.
The indoor fan operates at the set fan speed.
The outdoor unit stops.
The outdoor unit starts.
(Compressor and the outdoor fan start.)
When the frequency reaches Hz,
frequency increases are stopped for a period
of seconds. (Refer to Table 1.)
The frequency then increases.
DRY operation starts
DRY A operation
The indoor fan changes between "Low"
and "LL" (very low) over a 6-minute cycle.
This is 1/f fluctuation fan operation.
(Refer to Fig. 1.)
DRY B operation
(1)
The indoor fan changes between "Low"
and "LL" (very low) over a 6-minute cycle.
This is 1/f fluctuation fan operation.
The outdoor unit does not operate for 3 minutes
even after the breaker is turned ON.
The frequency is increased at the rate of 0.5
Hz every 1 seconds.
This is in order to stabilize the return of oil to the
compressor.
If the indoor and outdoor temperatures are high,
the current peak cut-off activates, stopping
any increases in frequency.
Operating frequency is stabilized in order to
maintain a comfortable environment.
Operates to effectively dehumidify the air while
not excessively reducing the indoor
temperature.
The indoor unit operates at 1/f fluctuation fan
operation, at a fan speed that does not cause
a chilly feeling.
The compressor operates on a 3-minutes ON,
6-minutes OFF cycle, to prevent the room
temperature from dropping too much.
The room temperature is
below 59 °F.
1/f fluctuation fan
250
200
150
(Step)
100
50
0
(2)
After appoximately 3 minutes, the
compressor turns OFF, the outdoor fan
turns OFF, and the indoor fan turns OFF.
After approximately 6 minutes, the
(3)
conditions return to (1).
Monitoring operation begins.
6-minute cycle
Fig. 1
When monitoring operation begins, the
compressor stops, and the indoor fan operates at
"LL" (very low) speed.
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< Low Ambient Cooling Operation >
When the outdoor air temperature reaches 57.2 °F (14 °C ) or less during the cooling operation,
the operation mode is switched to low ambient cooling operation.
When the mode is switched from cooling opration to low ambient cooling operation,
the compressor is stopped for 150 seconds temporarily.
When the mode has been switched to low ambient cooling operation,
the outdoor fan speed is lowered as the outdoor air temperature falls.
Outdoor fan speed [ rpm ]
When the outdoor air temperature reaches 62.6 °F (17 °C ) or more during the low ambient
cooling operation, the operation mode is switched to cooling operation.
The following protective actions are available to prevent the compressor from operating
with abnormal loads.
At that time, they initiate thermo-off ( stopping the outdoor unit ) of the air conditioner.
32 °F ( °C )
Outdoor air temperature
Outdoor air temp.
°F ( °C )
14 (-10)
8.6 (-13)
Compressor
Indoor fan
ON ON
OFF
ON
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7-2. Protective Functions
NOTE
The numerical values such as temperature, frequency, time and current in parentheses are an example
of CM3172A and the values are different from the other models.
7-2-1. Current Control
The operating current may rise as a result of causes including increasing cooling loads or decreases in power
voltage. In these cases, the operating frequency is automatically reduced, or operation is stopped, in order to control
the operating current so that it is (20 A) or less.
As a result:
Power breakers and fuses will not be tripped.
•
Operation can continue during this period with somewhat reduced cooling capacity.
•
Operation at normal capacity is restored when the cause of the current rise is eliminated.
•
Description of function
Example of operation for cooling
(20A)
(17A)
(16.6A)
Target
frequency
Power Point C
Point B
Point A
Frequency
Frequency Current
Operates at the target frequency at Point A and below.
•
Stops increases to the frequency between Points A and B.
•
Reduces the frequency by 1 Hz per 0.5 seconds when Point B is exceeded.
•
Stops operation, and restarts it appoximately 3 minutes later, if Point C is exceeded.
•
(May operate when sudden voltage fluctuations occur. Indicates trouble.)
Stops operation
Approx.3 minutes
(1) Automatic frequency control
The operating frequency is reduced automatically, or operation is stopped, in order to control the operating
current so that it is at or below the values shown in the table below.
(20A)
COOL
Point C (peak cut trip)
Point B (Hz reduction)
Point A (Hz increase prohibit) (16.6)
(20.0)
(17.0)
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Current(A)
Frequency (Hz)
Trip
Hz reduction
Hz increase
prohibit
Hz reduction
Hz increase prohibit
Hz reduction
Hz increase prohibit
(16)
(15.6)
0
(30)
Example of operation during cooling
The operating frequency upper limits shown in the figure below are established for frequency reduction and
increase-prohibit.
(2) Current control
(230)
(223)
(212)
Trip
5Hz every 30 sec. reduction
2Hz every 30 sec. reduction
No control
Increase
prohibit range
(Hz reduction)
(°F)
Compressor discharge temperature
(194)
Within the increase-prohibit range, the range changes
to the Hz reduction range (2 Hz every 30 seconds) if
the compressor temperature rises by 4 °F.
*
Operation starts at (8 Hz), and the start current is less than the normal operating current. This prevents the flickering
of fluorescent lights or television screens that occurs when ordinary A/C units start.
7-2-2. Low Start Current
To protect the compressor coil from overheating, the operating frequency is controlled based on the compressor
discharge temperature.
7-2-3. Compressor Temperature Control
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8. TROUBLESHOOTING
8-1. Precautions before Performing Inspection or Repair
Both the indoor unit and outdoor unit include electronic control circuits.
Be sure to pay attention to the following before inspecting or repairing the outdoorside electronic circuits.
High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an
electrical charge (charging voltage DC 311 V) even after the power is turned OFF, and some time is required
for the charge to dissipate.
Be careful not to touch any electrified parts before the control circuit board Power Lamp (red) turns OFF.
If the outdoor control circuit board is normal, approximately 180 seconds will be required for the charge to
dissipate. However, allow at least 30 minutes for the charge to dissipate if it is thought there might be trouble
with the outdoor control circuit board.
For example, if the outdoor control circuit board fuse has blown, approximately 30 minutes will be required to
discharge the high-capacity electrolytic capacitors.
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8-2. Trouble Diagnosis by Error Monitor Lamps
Warning
To prevent electric shock, do not inspect or repair until the Power Lamp on
the P.C.Board is turned off.
8-2-1. Location of the Error Monitor Lamps
Remove the top plate of outdoor unit and the cover of Electrical Component Box.
The Power Lamp and Error Monitor Lamps are located on the P.C.Board of Electrical Component Box. (Fig.1)
Heat Exchanger Rear side P.C.Board of Electrical Component Box.
Error Monitor Lamps
Power Lamp
ERR0
ERR1
ERR2
ERR3
Front side
Fig.1 View from top
8-2-2. Display of the Error Monitor Lamps
If a protective device has activated or there is a sensor failure in the outdoor unit, the 4 error monitor lamps on the
outdoor control circuit board will indicate the nature of the trouble.
: ON : OFF
Error Monitor Lamp
ERR0 ERR1 ERR2 ERR3
Sensor for compressor discharge temp
Sensor for heat excharge temp
Sensor for branch pipe A (Narrow tube)
Sensor for branch pipe B (Narrow tube)
Sensor for branch pipe C (Narrow tube)
Sensor for branch pipe D (Narrow tube)
Outdoor temp sensor
Sensor for branch pipe A (Wide tube)
Sensor for branch pipe B (Wide tube)
Sensor for branch pipe C (Wide tube)
Sensor for branch pipe D (Wide tube)
Error Contents
HIC circuit trouble (current, temp)
Actuation of comp over load relay
Actuation of freeze protection function
Outdoor unit error. Detail of error message indicate on indoor LED
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Page 66
8-3. Checking the Outdoor System
8-3-1. Checking the outdoor unit
No.
1
2
NOTE
Work procedure
Apply 220 V AC between terminals L1 and L2 on the
•
outdoor unit terminal plate.
Short-circuit the T-RUN terminal to the COM terminal
•
of TEST/T-RUN terminals.
The LED (red) on the control board must illuminate.•
The compressor and fan motor must turn ON.
•
(They turn ON about (70) seconds later after the power
is turned ON.)
Check items (unit operation)
If the above check items are okay, but the outdoor unit does not operate, there may be a faulty
connection between the indoor unit and the outdoor unit.
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8-4. Trouble Diagnosis of Each Part
8-4-1. Problems of Each Part and Inspection Points
For details about the inspection points, refer to the Inspection Points for Each Part.
Problems
Inspection
points
Self-Diagnostics check
Indoor controller
(control unit)
Indoor fan motor
Room temperature
sensor
Heat exchanger
temperature sensor
Indoor unitOutdoor unit
Inter-unit cable
Indoor unit
Indoor unit does not operate.
Operation lamp blinking.
Operation lamp does not illuminate.
Indoor fan dose not turn.
Outdoor unit
Outdoor unit does not operate.
Outdoor fan dose not turn.
The compressor (only) does not
operate.
The compressor stops on occasion.
The compressor speed does not
Others
No. of
Inspection
Points for
Each part
increase.
The electric expansion valve does
not operate.
Does not cool or cooling
performance is inadequate.
Switch circuit board
Outdoor control circuit
board
Diode module
HIC
Electrolytic capacitor
Fuse
Compressor
Compressor protective
sensor
Outdoor fan motor
Coil thermistor
Electric expansion valve
Branch tubing
temperature sensor
(1)
(2)
(3)
(4)
(5)
(6)
(7)
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Problems
Inspection
points
Indoor unit
Indoor unit does not operate.
Operation lamp blinking.
Operation lamp does not illuminate.
Indoor fan dose not turn.
Outdoor unit
Outdoor unit does not operate.
Outdoor fan dose not turn.
The compressor (only) does not
operate.
The compressor stops on occasion.
The compressor speed does not
Others
No. of
Inspection
Points for
Each part
increase.
The electric expansion valve does
not operate.
Does not cool or cooling
performance is inadequate.
Breaker
Refrigerant gas pressure
Others
8-4-2. Inspection Points for Each Part
(1) Outdoor control circuit board
Refer to 8-3-1. Checking the outdoor unit.
NOTE
(2) Fuse
Check it visually or the continuity with a tester.
(3) Compressor
Check for an open circuit in the compressor coil winding.
(4) Compressor protective sensor (compressor discharge temperature thermistor)
Check that the senseor is securely contained in the thermostart holder.
Do not remove or insert the outdoor control circuit board connector when power is being supplied to it.
(The controller will be damaged.)
(8)
(9)
(5) Coil thermistor
Check that the sensor is securely contained in the thermostat holder.
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(6) Electric expansion valve
When replacing the electric expansion valve and coil, be sure to attach the connectors in the correct positions.
Labels are applied to the valve body and coil, corresponding to the connector colors, to identify them.
Controller check
No voltage on circuit board
Check the illumination
of the red Power Lamp.
Replace the controller.
NOTE
Cool the main unit with
a damp cloth or other
means while welding.
When applying
vacuum, use the
special service magnet
and rotate at least 5
revolutions
counterclockwise to
fully open the electric
expansion valve.
Use a multi-meter to measure the voltage (12 V).
When the power is turned ON, the needle will move in the
Voltage varies
Check the coil resistance.
0 ohm
Replace the coil.
No temperature change Temperature changes
Replace the electric
expansion valve.
Approx. 46 +/– 4 ohm
Open and close the
electric expansion valve
by hand to check it.
This part is normal.
following seguence in approximately 10 to 20 seconds for
each point.
*1
Check elsewhere.
Model No. Sequence
CM1972A
CM2472A
CM3172A
MV0 MV1
MV0 MV1 MV2 MV3
Check the resistance between the gray lead
wire and the other wires.
Resistance is OK if it is 46 + / – 4ohm at 68 °F
Use the special service magnet and
rotate 5 revolutions clockwise to fully
close the valve.
Then start the unit and measure the
temperature at the inlet and outlet
tubes of the electric expansion valve.
If the temperature difference is large,
the valve is closed.
Then rotate 5 revolutions
counterclockwise to open the valve.
Operation is normal if the temperature
difference between the 2 tubes drops.
MV2
*1 If you have manually checked the electric expansion valve, be sure to reapply the outdoor power after you have
replaced the wiring. (The position of the elecric expansion valve will changed.)
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(7) Branch tubing temperature sensor
Check that the sensor is securely contained in the thermostat holder.
(8) Breaker
Check whether or not the breaker has been tripped.
Check that the breakers and fuses used are of the specified capacity.
Check that the breaker and its line are exclusive for A/C use.
(9) Refrigerant gas pressure
Start a COOL test run, and messure the temperatures of the A/C intake air and discharge air. Compare the values
with the performance charts.
If the values are higher than the performance charts:
Check for refrigerant shortage or blockage of the refrigerant circuit.
< Assessment of refrigerant shortage >
1. The pressure in the low-pressure section is 5 MPa or more below the value in the performance charts.
2. There is little condensation on the indoor heart exchanger, which overall appears dry.
< Distinguishing between refrigerant shortage and refrigerant circuit blockage >
If the pressure in the low-pressure section does not change when the circuit is charged 2 to 3 times with
refrigerant gas (0.44 lbs each time), or if the change is small, then the problem may not be
refrigerant shortage.
The problem may be a blockage of the refrigerant circuit.
1. Check that there is no internal leakage inside the 4-way valve:
At the low-pressure side tubing, check that there is no temperature difference between the intake and
discharge of the 4-way valve.
2. Check that the electric expansion valve is not blocked. Check as described on the preceding page.
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8-5. Trouble Diagnosis of Fan Motor
This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil
resistance, and the following procedure should be used to check the motor.
Perform the trouble diagnosis by Test Run mode described on Installation Instructions of indoor unit.
Important:
[Trouble symptom 1] The fan does not stop when the outdoor unit stops. Outdoor unit controller trouble
[Trouble symptom 2] The fan motor does not rotate when the outdoor unit is operating.
(Diagnostic procedure)
(Diagnostic results)
(Reference) DC motor connector pin arrangement
(A) Turn OFF the power before connecting or disconnecting the motor connectors.
(B) When performing voltage measurement at the outdoor controller connector for (3) in the table
below, the DC motor will trip and voltage output will stop approximately 10 seconds after
operation is started. For this reason, to measure the voltage again, first turn OFF the outdoor
unit power, then, measure the voltage in Test Run mode.
* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor
unit controller (3 locations).
Measurement location
(1) Vm-Gnd: Between pin 1 and pin 4
(2) Vcc-Gnd: Between pin 5 and pin 4
(3) Vsp-Gnd: Between pin 7 and pin 4
All of the above measured values are normal. Fan motor trouble (Replace the motor.)
Any one of the above measured values is not normal. Outdoor unit controller trouble
Pin 1: Vm (red)
Pin 2: Not used
Pin 3: Not used
Pin 4: Gnd (blue)
Pin 5: Vcc (brown)
Pin 6: PG (white)
Pin 7: Vsp (orange)
DC 230V or more
DC 14V or more
After fluctuating 4 times between DC 1.7 to 6.1V
(1 sec. ON) and DC 0 V (1 sec. OFF), the DC
motor trips.
(Replace the controller .)
Normal value
[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the outdoor
unit operates.
(There is trouble in the system that provides feedback of motor rotation speed from the
motor to the outdoor unit controller.)
[Trouble symptom 4] Fan motor rotation speed does not change during outdoor unit operation.
[Trouble symptom 5] Fan motor rotation speed varies excessively during outdoor unit operation.
(Remedy for symptom 3 to 5)
It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble.
Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor.
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9. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
9-1. Characteristics of New Refrigerant R410A
9-1-1. What is New Refrigerant R410A?
R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its
refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22.
9-1-2. Components (mixing proportions)
HFC32 (50%) / HFC125 (50%)
9-1-3. Characteristics
Less toxic, more chemically stable refrigerant
The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when
there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in
composition of the remaining refrigerant. Therefore, do not add new refrigerant. Instead, recover the
remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified
amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).
When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid
phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in
gaseous state. Thus, always charge the refrigerant while it is in liquid phase.
CAUTION
Ether-type oil is used for compressor oil for R410A-type units, which is different
from the mineral oil used for R22. Thus more attention to moisture prevention and
faster replacement work compared with conventional models are required.
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9-2. Checklist before Servicing
Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ
between these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amount of
extrusion) by using the flare spacer.
Diameter of tube D
Dia.1/4" (6.35 mm)
Dia.3/8" (9.52 mm)
Dia.1/2" (12.7 mm)
Dia.5/8" (15.88 mm)
Size of flare
Tubing precautions
Specification A
Flare tool for R410A Conventional flare tool (for R22)
0 to 0.0196"
(0 to 0.5 mm)
D
Flare tool for R410A
A
Conventional flare tool (R22)
D
0.0472"
(1.2 mm)
Spacer
A
Refrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarily
cover the ends of the tubing with caps or tape prior to installation.
Never use 0.0276" (0.7 mm)-thick copper tubing or tubing which is less than 0.0315" (0.8 mm) in thickness, since
air conditioners with R410A are subject to higher pressure than those using R22 and R407C.
No addition of compressor oil for R410A
No additional charge of compressor oil is permitted.
No use of refrigerant other than R410A
Never use a refrigerant other than R410A.
If refrigerant R410A is exposed to fire
Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be sure
to provide ample ventilation during installation work.
Caution in case of R410A leak
Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room,
immediately provide thorough ventilation.
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9-3. Tools Specifically for R410A
For servicing, use the following tools for R410A
Tool Distinction Tool Name
Gauge manifold
Charging hose
Gas leak detector
Refrigerant cylinder
Charging cylinder
Refrigerant recovery unit
Tools specifically for R410A
Vacuum pump with anti-reverse flow (*1)
(Solenoid valve-installed type, which prevents oil from flowing back into the
unit when the power is off, is recommended.)
Vacuum pump (*2)...can be used if the following adapter is attached.
Vacuum pump adapter (reverse-flow prevention adapter) (*3).
(Solenoid valve-installed adapter attached to a conventional vacuum pump.)
Electronic scale for charging refrigerant
Flare tool
Bender
Tools which can be com-
monly used for R22,
R407C, and R410A
CAUTION
To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, shape and external
diameter of the service port screw has been altered.
<External diameter of service port> R410A : 5/16"
R22, R407C : 1/4"
The above tools specifically for R410A must not be used for R22 and R407C.
Doing so will cause malfunction of the unit.
For the above vacuum pump (*1, *2) and vacuum pump adapter (*3), those for
R22-type units can be used for R410A-type. However, they must be used
exclusively for R410A and never alternately with R22 and R407C.
Torque wrench
Cutter, reamer
Welding tool, nitrogen gas cylinder
9-4. Tubing Installation Procedures
When the tubes are connected, always apply HAB oil on the flare portions to improve the sealing of tubing.
The following is the HAB oil generally used:
Esso: ZERICE S32
NOTE
For details on tubing installation procedures, refer to the installation manuals attached to the indoor
unit and outdoor unit.
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9-5. In Case of Compressor Malfunction
CAUTION
Should the compressor malfunction, be sure to make the switch to a replacement
compressor as quickly as possible.
Use only the tools indicated exclusively for R410A. See "9-3. Tools Specifically
for R410A."
9-5-1. Procedure for Replacing Compressor
(1) Recovering refrigerant
Any remaining refrigerant inside the unit should not be
released to the atmosphere, but recovered using the
refrigerant recovery unit for R410A.
Do not reuse the recovered refrigerant, since it will contain
impurities.
(2) Replacing Compressor
Soon after removing seals of both discharge and suction
tubes of the new compressor, replace it quickly.
(3) Checking for sealing
(1) Recover refrigerant
OK
(2) Replace compressor
OK
Use nitrogen gas for the pressurized gas, and never use a
refrigerant other than R410A. Also do not use oxygen or
any flammable gas.
(4) Evacuation
Use a solenoid valve-installed vacuum pump so that
even if power is cut off in the middle of evacuation of air
due to a power interruption, the valve will prevent the
pump oil from flowing back.
The equipment may be damaged if moisture remains in
the tubing, thus carry out the evacuation thoroughly.
When using a vacuum pump with exhaust air volume more
than 0.883 cu.ft./min. and ultimate vacuum pressure rate
of 50 micron Hg.
Standard time for evacuation
Length of tubing
Evacuation time
Less than 33 ft. (10 m)
More than 10 minutes
(3) Check for sealing
OK
(4) Evacuation
OK
(5) Recharge
More than 33 ft. (10 m)
More than 15 minutes
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(5) Recharging
Configuration and characteristics of cylinders
Be sure to charge the specified amount of
refrigerant in liquid state using the service port
of the wide tube service valve. The proper
amount is listed on the unit's nameplate.
When the entire amount cannot be charged all at
once, charge gradually while operating the unit in
Cooling Operation.
CAUTION
Never charge a large amount
of liquid refrigerant at once to
the unit. This may cause
damage to the compressor.
When charging with a refrigerant cylinder, use an
electronic scale for charging refrigerant. In this
case, if the volume of refrigerant in the cylinder
becomes less than 20% of the fully-charged
amount, the composition of the refrigerant starts
to change. Thus, do not use the refrigerant if
the amount in the charging cylinder is less
than 20%.
Also, charge the minimum necessary amount to
the charging cylinder before using it to charge
the air conditioning unit.
Valve
Liquid
Single valve
Charge liquid refrigerant with
cylinder in up-side-down position.
Fig. 1
Valve
Example:
In case of charging refrigerant to a unit requiring
1.68 lb. (0.76 Kg) using a capacity of a 22 lb. (10
Kg) cylinder, the minimum necessary amount for
the cylinder is:
1.68 + 22 0.20 = 6.08 lb.
(0.76 + 10 0.20 = 2.76 Kg)
For the remaining refrigerant, refer to the
instructions of the refrigerant manufacturer.
If using a charging cylinder, transfer the specified
amount of liquid refrigerant from the refrigerant
cylinder to the charging cylinder.
Prepare an evacuated charging cylinder
beforehand.
CAUTION
To prevent the composition
of R410A from changing,
never bleed the refrigerant
gas into the atmosphere
while transferring the
refrigerant. (Fig. 3)
Charging
cylinder
Open
Liquid
Single valve (with siphon tube)
Charge with cylinder in normal position.
Fig. 2
NO!
Liquid
Refrigerant
cylinder
Do not use the refrigerant if the amount in the
charging cylinder is less than 20%.
Fig. 3
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9-6. In Case Refrigerant is Leaking
CAUTION
Never attempt to charge additional refrigerant when refrigerant has been leaking
from the unit. Follow the procedure described below to locate points of leaks and
carry out repairs, then recharge the refrigerant.
(1) Detecting Leaks
Use the detector for R410A to locate refrigerant leak
points.
(2) Recovering refrigerant
Never release the gas to the atmosphere; recover
residual refrigerant using the refrigerant recovery unit for
R410A, instead.
Do not reuse the recovered refrigerant because its
composition will have been altered.
(3) Welding leaking points
Confirm again that no residual refrigerant exists in the unit
before starting welding.
Weld securely using flux and wax for R410A.
Prevent oxide film from forming inside the tubes utilizing
substitution with nitrogen (N2) in the refrigerant circuit of
the unit. Leave ends of tubes open during welding.
(1) Detect leaks
OK
(2) Recover refrigerant
OK
(3) Weld leaking points
OK
(4) Checking for sealing
Use nitrogen gas for the pressurized gas, and never use
a refrigerant other than R410A. Also do not use oxygen or
any flammable gas.
(5) Evacuation
Use a solenoid valve-installed vacuum pump so that
even if power is cut off in the middle of evacuation of air
due to a power interruption, the valve will prevent the
pump oil from flowing back.
The equipment may be damaged if moisture remains in
the tubing, thus carry out the evacuation thoroughly.
When using a vacuum pump with exhaust air volume
more than 0.883 cu.ft./min. and ultimate vacuum pressure
rate of 50 micron Hg.
Standard time for evacuation
Length of tubing
Evacuation time
(6) Recharging
Less than 33 ft. (10 m)
More than 10 minutes
(4) Check for sealing
OK
(5) Evacuation
OK
(6) Recharge
More than 33 ft. (10 m)
More than 15 minutes
Recharge unit in the same manner explained on the
previous page "(5) Recharging."
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9-7. Charging Additional Refrigerant
9-7-1. When Tubes are Extended
Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came
with the indoor unit. Charge additional refrigerant in liquid state only.
CAUTION
Never charge additional refrigerant if refrigerant is leaking from the unit. Follow
instructions given in "9-6. In Case Refrigerant is Leaking" and completely carry out
repairs. Only then should you recharge the refrigerant.
9-8. Retro-Fitting Existing Systems
9-8-1. Use of Existing Units
Never use new refrigerant R410A for existing units which use R22. This will cause the air conditioner to
operate improperly and may result in a hazardous condition.
9-8-2. Use of Existing Tubing
If replacing an older unit that used refrigerant R22 with a R410A unit, do not use its existing tubing. Instead,
completely new tubing must be used.
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APPENDIX A
INSTALLATION INSTRUCTIONS
CM1972A
CM2472A
CM3172A
(II-852-6-4190-509-00-0)
A-1
Page 80
CAUTION
For Outdoor Unit
NOTE
INSTALLATION INSTRUCTIONS
– Inverter Multi Split System Air Conditioner –
This air conditioner uses the new refrigerant R410A.
Refrigerant service valve size = 5/16"
Contents
Page
IMPORTANT!
Please Read Before Starting .................................. 2
1. GENERAL .......................................................... 3
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied with Unit
1-3. Optional Copper Tubing Kit
1-4. Type of Copper Tube and Insulation Material
1-5. Additional Materials Required for Installation
2. INSTALLATION SITE SELECTION ................... 4
2-1. Indoor Unit
2-2. Connecting Indoor Units
2-3. Outdoor Unit
2-4 Baffle Plate for the Outdoor Unit
2-5. Outer Dimensions of Outdoor Unit
2-6. Diagram of Outdoor Unit Installation
3. INSTALLATION PROCESS .............................. 15
3-1. Embedding the Tubing and Wiring
3-2. Use of the Flaring Method
3-3. Flaring Procedure with a Flare Tool
3-4. Caution before Connecting Tubes Tightly
3-5. Tubing Connections
3-6. Insulation of Refrigerant Tubing
3-7. Taping the Tubes
3-8. Finishing the Installation
4. AIR PURGING................................................... 18
I Air Purging with a Vacuum Pump (for Test Run)
I Pump Down
COOL/ DRY Model
Model Combinations
Combine indoor and outdoor units only as listed
below.
Indoor Unit Outdoor Unit
KMS0772 CM1972A
KMS0972 CM2472A
KMS1272 CM3172A
KMS1872
KMS2472
XMS0972
XMS1272
XS1872
Power Source:
60 Hz, single-phase, 230 / 208 VAC
Be sure to connect indoor and outdoor units
only in combinations that are listed in the
combination table(s) included in the outdoor
unit package.
Connecting any other model may result in
operation failure and malfunction.
Combination example
Indoor unit B
Indoor unit A
Indoor unit C
5. WIRING INSTRUCTIONS ................................. 21
5-1. General Precautions on Wiring
5-2. Recommended Wire Length and Diameter
5-3. Wiring System Diagram
5-4. How to Connect Wiring to the Terminal
5-5. Wiring Instructions for the Outdoor Unit
6. TEST RUN......................................................... 25
7. CONNECTING A HOME AUTOMATION
DEVICE ............................................................. 26
8. INSTALLATION CHECK SHEET ...................... 26
Be sure to read the yellow instruction sheet
attached to the outdoor unit for models using the
new refrigerant R410A.
85264190509000 © SANYO 2010
Outdoor unit
Indoor unit D
NOTE
The illustrations are based on the typical appearance of
a standard model. Consequently, the shape may differ
from that of the air conditioner that you are installing.
SANYO North America Corporation In Canada
Commercial Solutions Division SANYO Canada Inc.
2055 Sanyo Ave., San Diego 201 Creditview Road, Woodbridge
CA 92154, U.S.A. Ontario, L4L 9T1, Canada
Page 81
IMPORTANT!
CAUTION
WARNING
WARNING
CAUTION
Please Read Before Starting
When Installing…
This air conditioning system meets strict safety and operating
standards. As the installer or service person, it is an important
part of your job to install or service the system so it operates
safely and efficiently.
For safe installation and trouble-free operation, you
must:
G
Carefully read this instruction booklet before beginning.
G
Follow each installation or repair step exactly as shown.
G
Observe all local, state, and national electrical codes.
G
Pay close attention to all warning and caution notices
given in this manual.
This symbol refers to a hazard
or unsafe practice which can
result in severe personal injury
or death.
This symbol refers to a hazard
or unsafe practice which can
result in personal injury or product or property damage.
If Necessary, Get Help
These instructions are all you need for most installation
sites and maintenance conditions. If you require help for a
special problem, contact our sales/service outlet or your
certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to
follow the instructions in this document.
SPECIAL PRECAUTIONS
When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED ELECTRICIAN
SHOULD ATTEMPT TO WIRE THIS SYSTEM.
• Do not supply power to the unit until all wiring and tubing
are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this
system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and
inadequate grounding can cause accidental injury or
death.
• Ground the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
When Transporting
Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when
lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.
…In a Ceiling or Wall
Make sure the ceiling/wall is strong enough to hold the
unit’s weight. It may be necessary to construct a strong
wood or metal frame to provide added support.
…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
Install the outdoor unit on a raised platform that is higher
than drifting snow. Provide snow vents.
When Connecting Refrigerant Tubing
• Use the flare method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces of
the flare and union tubes before connecting them, then
tighten the nut with a torque wrench for a leak-free
connection.
• Check carefully for leaks before starting the test run.
When Servicing
• Turn the power OFF at the main power box (mains) before
opening the unit to check or repair electrical parts and
wiring.
• Keep your fingers and clothing away from any moving
parts.
• Clean up the site after you finish, remembering to check
that no metal scraps or bits of wiring have been left inside
the unit being serviced.
Others
• Ventilate any enclosed areas when installing or testing
the refrigeration system. Escaped refrigerant gas, on
contact with fire or heat, can produce dangerously
toxic gas.
• Confirm upon completing installation that no refrigerant
gas is leaking. If escaped gas comes in contact with a
stove, gas water heater, electric room heater or other heat
source, it can produce dangerously toxic gas.
• Do not install only a single indoor unit.
2
Page 82
CAUTION
1. General
This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning.
If the electric wiring diagram does not appear in this manual, please check for the diagram on the indoor unit.
1-1. Tools Required for Installation (not supplied)
1. Standard screwdriver
2. Phillips head screwdriver
3. Knife or wire stripper
4. Tape measure
5. Carpenter’s level
6. Sabre saw or key hole saw
1-2. Accessories Supplied with Unit
Table 1
Parts Figure Q’ty Parts Figure Q’ty Parts Figure Q’ty
Hex wrench Cushion rubber 4
Labels for inter-unit
cable and tube
ABCD
7. Hacksaw
8. Core bits
9. Hammer
10. Drill
11. Tube cutter
12. Tube flaring tool
1
4 each
Reducer
(3/8" 1/2")
CM1972A
13. Torque wrench
14. Adjustable wrench
15. Reamer (for deburring)
16. Vacuum pump (For R410A)
17. Manifold valve
Reducer
(1/2" 3/8")
1
CM2472A
CM3172A
Packed in the outdoor unit.
1
2
1-3. Optional Copper Tubing Kit
Copper tubing for connecting the outdoor unit to the
indoor unit is available in kits which contain the narrow
and wide tubing, fittings and insulation. Consult your
nearest sales outlet or air conditioning workshop.
2. Foamed polyethylene insulation for the specified
copper tubes as required to precise length of tubing.
Wall thickness of the insulation should be not less
than 5/16" (8 mm).
3. Use insulated copper wire for field wiring. Wire size
varies with the total length of wiring.
1-4. Type of Copper Tube and Insulation Material
Refer to 5. Wiring Instructions for details.
If you wish to purchase these materials separately from
a local source, you will need:
1. Deoxidized annealed copper tube for refrigerant tubing as detailed in Table 2.
Cut each tube to the appropriate lengths 1' to 1'4"
Check local electrical codes
and regulations before
obtaining wire. Also, check
any specified instructions or
limitations.
(30 cm to 40 cm) to dampen vibration between units.
Table 2
Model
KMS0772 / 0972 / 1272 1/4" (6.35 mm) 0.0314" (0.8 mm) 3/8" (9.52 mm) 0.0314" (0.8 mm)
KMS1872 1/4" (6.35 mm) 0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)
KMS2472 1/4" (6.35 mm) 0.0314" (0.8 mm) 5/8" (15.88 mm) 0.0393" (1.0 mm)
XMS0972 / 1272 1/4" (6.35 mm) 0.0314" (0.8 mm) 3/8" (9.52 mm) 0.0314" (0.8 mm)
XS1872 1/4" (6.35 mm) 0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)
Outer Dia. Thickness Outer Dia. Thickness
Narrow Tube Wide Tube
1-5. Additional Materials Required for Installation
1. Refrigeration (armored) tape
2. Insulated staples or clamps for connecting wire
(See local codes.)
3. Putty
4. Refrigeration lubricant
5. Clamps or saddles to secure refrigerant tubing
3
Page 83
2. Installation Site Selection
Drain hose
Indoor unit
Outside drainage
INDOOR
UNIT (1)
INDOOR
UNIT (4)
INDOOR
UNIT (3)
INDOOR
UNIT (2)
Tubing length (L1)
L2
L3
L4
H2
H3
H4
OUTDOOR
UNIT
Elevation
difference (H1)
WARNING
CAUTION
3.3 ft.
(1m)
(1m)
(1m)
3.3 ft.
(1m)
3.3 ft.
3.3 ft.
3.3 ft.
(1m)
2-1. Indoor Unit
To prevent abnormal heat generation
and the possibility of fire, do not
place obstacles, enclosures and
grilles in front of or surrounding the
air conditioner in a way that may
block air flow.
AVOID:
G direct sunlight.
G nearby heat sources that may affect performance of the
unit.
G areas where leakage of flammable gas may be expected.
Fig. 1
For wall-mounted units
G placing or allowing any obstructions near the air conditioner
inlet or outlet.
G installing in rooms that contain instant-on (rapid-start)
fluorescent lamps. (These may prevent the air conditioner
from receiving signals.)
G places where large amounts of oil mist exist.
G installing in locations where there are devices that
generate high-frequency emissions.
DO:
G select an appropriate position from which every corner of
the room can be uniformly cooled. (High on a wall is best
for wall-mounted types.)
G select a location that will hold the weight of the unit.
G select a location where tubing and drain hose have the
shortest run to the outside. (Fig. 1)
G allow room for operation and maintenance as well as
unrestricted air flow around the unit. (Fig. 2a or 2b)
G install the unit within the maximum elevation difference
(H1, H2, H3, H4) above or below the outdoor unit and
within a total tubing length (L1+L2+L3, L1+L2+L3+L4)
from the outdoor unit as detailed in Table 3 and Fig. 3a.
Fig. 3a
2" (5 cm)
min.
For ceiling-mounted cassette units
• Air delivery from a ceilingmounted cassette unit will
be degraded if the distance
from the floor to the ceiling
is greater than 10 ft. (3 m).
• For stable operation of the
air conditioner, do not install
wall-mounted units less
than 5' (1.5 m) from floor
level. (Fig. 3b)
4
6" (15 cm)
min.
Front View
Fig. 2a
Fig. 2b
Minimum height
from floor level
Fig. 3b
2" (5 cm)
Indoor unit
5' (1.5 m)
Floor level
min.
Wall
Page 84
G install the indoor unit more than 3.3' (1 m) away from any
antenna or power lines or connecting wires used for television, radio, telephone, security system, or intercom.
Electrical noise from any of these sources may affect
operation.
G install in a sturdy manner to avoid increased operating
noise.
Table 3
Max. Max. Allowable Total Limit of Limit of Elevation Required Amount
Model Tubing Length at shipment (L1+L2+L3) or (H1, H2, H3, H4) Refrigerant
CM1972A 82 150 (L1+L2+L3) 150 (L1+L2+L3) 50 —
CM2472A 82 150 (L1+L2+L3+L4) 200 (L1+L2+L3+L4) 50 0.22
CM3172A 100 150 (L1+L2+L3+L4) 230 (L1+L2+L3+L4) 50 0.22
* If total tubing length becomes 150 to 200 ft. (Max.) or 150 to 230 ft. (Max.), charge additional refrigerant (R410A) by 0.22 oz./ft.
No additional charge of compressor oil is necessary. For more detailed charging information, refer to the Technical & Service Manual.
Allowable Tubing Length Total Tubing Length Difference of Additional
per unit (L1+L2+L3) or (L1+L2+L3+L4) (ft.) (oz./ft.)*
(ft.) (L1+L2+L3+L4) (ft.)
(ft.)
5
Page 85
Union 1/2"(12.70mm)
1/2"(12.70
mm
)
Flare 3/8"(9.52
mm
)
A joint for connecting tubes of
different sizes
(3/8"(9.52mm) 1/2"(12.70mm)) Supplied Reducer
1/4"(6.35mm)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
C
B
A
Outdoor unit Indoor unit
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
(KMS1872)
(XS1872)
3/8"(9.52mm)
3/8"(9.52mm)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
C
B
A
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
D
Outdoor unit Indoor unit
3/8"(9.52
mm
)
3/8"(9.52mm)
3/8"(9.52
mm
)
3/8"(9.52mm)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
Union 3/8"(9.52mm)Flare 1/2"(12.70mm)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
1/2"(12.70mm)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
(1/2"(12.70
mm
) 3/8"(9.52mm)) Supplied Reducer
3/8"(9.52mm)
3/8"(9.52mm)
1/4"(6.35mm)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
C
B
A
Outdoor unit Indoor unit
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
2-2. Connecting Indoor Units
Figures (4a) – (4k) show the different types of indoor unit connections, including the use of a reducer.
To select the required indoor unit to be connected, refer to the Combination Table that was included in the
outdoor unit package.
(1) Connecting indoor unit for CM1972A
(A)
Fig. 4a
(B)
(2) Connecting indoor unit for CM2472A
(A)
Fig. 4b
Fig. 4c
6
Page 86
(B)
C
B
A
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
D
Outdoor unit Indoor unit
(KMS1872)
(XS1872)
1/2"(12.70
mm
)
1/2"(12.70
mm
)
3/8"(9.52mm)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
Locally purchased
C
B
(KMS1872)
(XS1872)
D
Outdoor unit Indoor unit
Union 1/2"(12.70
mm
)Flare 3/8"(9.52mm)
(3/8"(9.52
mm
) 1/2"(12.70mm))
1/2"(12.70mm)
3/8"(9.52
mm
)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
1/4"(6.35mm)
1/4"(6.35
mm
)
A
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52mm)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
(KMS1872)
(XS1872)
1/2"(12.70
mm
)
1/2"(12.70
mm
)
1/4"(6.35
mm
)
Union 5/8"(15.88mm)Flare 1/2"(12.70mm)
(1/2"(12.70
mm
) 5/8"(15.88mm)) Locally purchased
C
B
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
D
Outdoor unit Indoor unit
(KMS2472)
1/2"(12.70mm)
3/8"(9.52
mm
)
3/8"(9.52mm)
5/8"(15.88
mm
)
3/8"(9.52
mm
)
3/8"(9.52mm)
A
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
(C)
Fig. 4d
(D)
Fig. 4e
Fig. 4f
7
Page 87
(3) Connecting indoor unit for CM3172A
Union 3/8"(9.52mm)Flare 1/2"(12.70mm)
(1/2"(12.70
mm
) 3/8"(9.52mm)) Supplied Reducer
D
C
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
Outdoor unit Indoor unit
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
1/2"(12.70mm)
1/2"(12.70
mm
)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
A
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
B
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
3/8"(9.52mm)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
1/4"(6.35mm)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
Union 3/8"(9.52mm)Flare 1/2"(12.70mm)
(1/2"(12.70
mm
3/8"(9.52mm)) Supplied Reducer
A
Outdoor unit Indoor unit
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52mm)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
B
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
1/4"(6.35mm)
C
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
1/2"(12.70
mm
)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
D
(KMS1872)
(XS1872)
1/2"(12.70
mm
)
1/2"(12.70
mm
)
1/4"(6.35
mm
)
A
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
B
Outdoor unit Indoor unit
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
3/8"(9.52mm)
1/4"(6.35
mm
)
1/4"(6.35mm)
D
C
(KMS1872)
(XS1872)
(KMS1872)
(XS1872)
1/2"(12.70
mm
)
1/2"(12.70
mm
)
1/2"(12.70
mm
)
1/2"(12.70mm)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
(A)
(B)
Fig. 4g
(C)
Fig. 4h
Fig. 4i
8
Page 88
(D)
Union 5/8"(15.88mm)Flare 1/2"(12.70mm)
(1/2"(12.70
mm
) 5/8"(15.88mm))Locally purchased
C
D
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
Outdoor unit Indoor unit
(KMS2472)
Union 3/8"(9.52mm)Flare 1/2"(12.70mm)
(1/2"(12.70
mm
) 3/8"(9.52mm))Supplied Reducer
1/2"(12.70mm)
1/2"(12.70
mm
)
5/8"(15.88
mm
)
3/8"(9.52
mm
)
A
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
B
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
1/4"(6.35mm)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
Union 5/8"(15.88mm)Flare 1/2"(12.70mm)
(1/2"(12.70
mm
) 5/8"(15.88mm)) Locally purchased
B
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
A
Outdoor unit Indoor unit
(KMS0772,KMS0972,KMS1272)
(XMS0972,XMS1272)
3/8"(9.52mm)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
3/8"(9.52
mm
)
1/4"(6.35
mm
)
1/4"(6.35
mm
)
C
(KMS1872)
(XS1872)
1/2"(12.70
mm
)
1/2"(12.70
mm
)
1/4"(6.35mm)
D
(KMS2472)
1/2"(12.70
mm
)
5/8"(15.88
mm
)
1/4"(6.35
mm
)
(E)
Fig. 4j
Fig. 4k
9
Page 89
2-3. Outdoor Unit
NOTE
Outdoor unit
Hot air
Heat source
Exhaust fan
NO
Min.
7' (2 m)
Min.
7' (2 m)
Ground
Obstacle
Obstacle above
Air discharge
Min. 8" (20 cm)
Air intake
CAUTION
AVOID:
G heat sources, exhaust fans, etc. (Fig. 5a)
G damp, humid or uneven locations.
DO:
G choose a place as cool as possible.
G choose a place that is well ventilated.
G install in a location where at least two sides are unob-
structed, so that the flow of air at the intake port or
exhaust port is not blocked, and so that sufficient
space is ensured for maintenance to be carried out
without trouble. In general the top also must be unobstructed. (Fig. 5b)
G provide a solid base (level concrete pad, concrete block,
6" × 1'4" (15 × 40 cm) beams or equal), a minimum of 6"
(15 cm) above ground level to reduce humidity and
protect the unit against possible water damage and
decreased service life. (Figs. 5c and 5d)
Fig. 5a
Air intake Min. 8" (20 cm)
Min.
4" (10 cm)
Air discharge
Min.
1’8" (50 cm)
Valve
side
Min. 10"
(25 cm)
Fig. 5b
Drain holes
A solid base must not cover
the hole of the bottom plate.
G install cushion rubber under unit’s feet to reduce vibration
and noise. (Fig. 5e)
G use lug bolts or equal to bolt down unit, reducing vibration
and noise.
G install in a location where no antenna of a television or
radio exists within 10' (3 m).
2-4. Baffle Plate for the Outdoor Unit
It is recommended to use baffle plates.
When the outdoor unit is installed in a position exposed to
strong wind (such as seasonal winds with low air temperature in winter), baffle plates must be installed on the outdoor
unit. (Fig. 5f)
This unit is designed so that the fan of the outdoor unit runs
at low speed when the air conditioner is operated at low
outdoor air temperatures. When the outdoor unit is exposed
to strong wind, the system pressure drops because of the
freeze protector.
Install a pair of windbaffle plates at the front and back of the
outdoor unit if it will be subject to strong wind during the
winter. (Figs. 5f, 5g, 5h, 5i, and 5j)
Air intake
Concrete
or equal
Back
About 16" (40 c
Air intake baffle
Wind
m)
Fig. 5c
Anchor bolts
(4 pcs.)
Min. 6" (15 cm)
About 6" (15 cm)
Fig. 5d
Cushion rubber
Fig. 5e
Front
Wind
10
Air discharge baffle
No air intake baffle required on this side.
Fig. 5f
Page 90
(1) Recommended dimensions of the baffle plates
D
F
E
C
J
H
L
I
B
K
Q
R
A
G
O
(3- 6.5 mm)
3- 1/4"
(2- 6 mm)
2- 15/64"
A
B
H
C
E
F
K
I
J
G
G
D
(4- 6.5 mm)
4- 1/4"
Air Intake Baffle
Air Discharge Baffle
Fig. 5g
Fig. 5h
For Air Intake
Model
CM1972A
CM2472A
CM3172A
Dimensions
(inch)
(mm) 640 20 50 635 270 270 10 20 15 657 7.5 10 150 20 20
(inch)
(mm) 640 20 35 785 350 350 10 20 15 807 7.5 10 150 20 20
ABCDE FGH I JKLOQR
25-3/16 25/32 1-31/32 25 10-5/8 10-5/8 25/64 25/32 19/32 25-7/8 19/64 25/64 5-29/32 25/32 25/32
25-3/16 25/32 1-3/8
30-29/32 13-25/32 13-25/32
25/64 25/32 19/32
31-25/32
19/64 25/64 5-29/32 25/32 25/32
For Air Discharge
Dimensions
Model
CM1972A, 2472A,
3172A
Material to be used: Metal plate with corrosion protection treatment
Plate thickness: 0.0394 to 0.0472" (1.0 to 1.2 mm)
(inch)
(mm) 560 585 350 150 490 35 55 465 60 85 25
(2) Parts required (field supply except for screws)
Air Intake Baffle
Baffle plate 1
Screw 5/32 × 15/32" (4 × 12 mm) tapping 2 Attached to outdoor unit
Bolt 15/64 × 19/32 – 25/32" (M6 × 15 – 20 mm) 3
Nut 15/64" (M6) 3
Washer 3
Spring washer 3
Item Q’ty Remarks
ABCDE FGH I JK
22-1/16 23-1/32 13-25/32 5-29/32 19-9/32 1-3/8 2-5/32 18-5/16 2-3/8 3-11/32 31/32
Air Discharge Baffle
Baffle plate 1
Bolt 15/64 × 13/32 – 19/32" (M6 × 10 – 15 mm) 4
Nut 15/64" (M6) 4
Washer 4
Spring washer 4
Item Q’ty Remarks
11
Page 91
(3) Installation procedure
Panel top
Panel front
Panel side R
Panel side L
Panel side R
Panel top
Panel front
Panel side L
1. Air Intake Baffle
(1) Left side
1. Remove the top panel from the unit.
2. Remove the panel side L, and drill 3 holes of ø1/4 inch
(6.5 mm) at the prescribed position.
3. Install the windbaffle on the unit using field supply bolts
and nuts.
4. Recommended bolts to be used are 15/64" (M6 ISO
standard), and the recommended length of the bolts is
between 19/32 – 25/32 inch (15 – 20 mm).
5. Use washers and spring washers to tightly fasten the
windbaffle to the unit.
(2) Right side
1. Remove the top panel from the unit.
2. Use 2 preholes on the panel side R to install the baffle
plate.
3. Remove the panel side R from the unit by removing the
screws. These screws are used in step 4 below.
4. Put (sandwich) the windbaffle between the unit and the
panel side R, then install the windbaffle on the unit using
the above screws. Be careful not to damage the screw
holes.
2. Air Discharge Baffle
1. Remove the panels front, top, side L and R from the
unit and drill 4 holes of ø1/4 inch (6.5 mm) at the
prescribed positions.
2. Install the windbaffle on the unit using field supply
bolts and nuts.
3. Recommended bolts to be used are 15/64" (M6 ISO
standard), and the recommended length of the bolts
is between 13/32 – 19/32 inch (10 – 15 mm).
4. Use washers and spring washers to tightly fasten the
windbaffle to the unit.
Fig. 5i Fig. 5j
NOTE
G In order to prevent contact of the bolts and heat exchanger and other parts inside the unit, install the windbaffle using
bolts from inside the unit and fasten the bolts with nuts from outside the unit.
G When the windbaffle is installed on the unit, the unit has higher wind resistance. In order to prevent the unit from
falling over, anchor the legs of the unit using anchor bolts (or similar method).
(4) Precautions for installation
1. Be sure not to damage painted surfaces.
2. Finish the edges of the windbaffle to avoid cuts or injury.
3. Drilling of holes must be carefully done so that no damage is caused to external or internal parts of the unit.
Particular care must be taken that drill chips do not drop into the unit.
12
Page 92
2-5. Outer Dimensions of Outdoor Unit
(1) CM1972A
(2) CM2472A
23-15/16
23-15/16
5-11/32
15/32
A
5-11/32
15/32
A
13-19/32
12-19/32
12-19/32
13-19/32
14-17/32
14-17/32
A
35-7/16 (900)
Fig. 6a
A
35-7/16 (900)
2-29/32
2-29/32
23/32
1-13/16
2-1/16
29-1/8 (740)
29-1/8 (740)
2-27/32
2-3/4
5-29/32
2-3/4
2-1/32
Service valve on narrow tube side
(Outer diameter 1/4"(
Service valve on wide tube side
(Outer diameter 3/8"(
2-3/4
2-15/16
4-1/2
4-7/16
Service valve on wide tube side
(Outer diameter 1/2"(12.70))
Service valve on narrow tube side
(Outer diameter 1/4"(6.35))
2-3/4
6.35
9.52
))
))
(3) CM3172A
23-15/16
5-11/32
15/32
A
12-19/32
13-19/32
14-17/32
Fig. 6b
A
35-7/16 (900)
2-29/32
23/32
1-13/16
2-1/16
2-13/32
23/32
1-13/16
2-1/16
2-13/32
2-27/32
5-29/32
2-3/4
35-1/32 (890)
2-27/32
5-29/32
2-1/32
2-1/32
4-1/2
4-1/2
2-15/16
4-7/16
Service valve on wide tube side
(Outer diameter 3/8"(9.52))
Service valve on narrow tube side
(Outer diameter 1/4"(6.35))
Service valve on wide tube side
(Outer diameter 1/2"(12.70))
2-3/4
2-15/16
4-7/16
Service valve on wide tube side
(Outer diameter 3/8"(9.52))
Fig. 6c
13
unit: inch (mm)
Page 93
2-6. Diagram of Outdoor Unit Installation
(
Never install only a single indoor unit.
Over 4"(10cm)
Be sure to connect indoor and outdoor units only in
combinations that are listed in the catalog or in the
combination table that was provided with the outdoor unit.
(Use caution. Connecting any other model may result in
operation failure and malfunction.)
The dimensions indicated by in the figure below are
spaces that are required in order to maintain
performance. Install in a location where the dimensions
indicated by are ensured, and where 2 or more faces
of the unit are unobstructed. In principle, the top direction
should be unobstructed.
Over 8"(20cm)
Power breaker
Wall-mounted types
Indoor unit D
Indoor unit C
Indoor unit B
Indoor unit A
Service space
Ceiling-mounted
cassette types
Indoor unit D
Indoor unit C
Indoor unit B
Indoor unit A
Ensure 6"(15cm)
of space if a
drain hose is to
be used.
(50cm)
Over 1'8"
Base (not provided)
(concrete or similar material)
D
C
B
A
Fasten with anchor bolts
(not provided)
3/8" or M10, 4 locations)
Over 10
"(25cm)
Access panel C
Ground
wire
(not
provided)
Fig. 7
14
Page 94
3. Installation Process
3-1. Embedding the Tubing and Wiring
G Do not connect tubes to locations that are embedded.
G Be sure to bind refrigerant tubing and inter-unit cables
together with vinyl tape.
G The power cable must be obtained on-site.
(#12: Less than 85 ft.)
# ... AWG (American Wire Gauge)
G Be sure to apply the provided labels to both ends of
the inter-unit cables to prevent miswiring.
G Securely seal the end of embedded tubing with vinyl
tape in order to prevent dirt or moisture entry.
G In order to prevent insulation breakdown and ground
faults, do not allow the wire ends to come in contact
with rainwater, or be subject to dew condensation.
3-2. Use of the Flaring Method
Many of the conventional split system air conditioners
employ the flaring method to connect refrigerant tubes
which run between indoor and outdoor units. In this
method, the copper tubes are flared at each end and
connected with flare nuts.
Before
Deburring
After
3-3. Flaring Procedure with a Flare Tool
(1) Cut the copper tube to the required length with a
tube cutter. It is recommended to cut approx. 12" to
20" (30 to 50 cm) longer than the tubing length you
estimate.
(2) Remove burrs at the end of the copper tube with a
tube reamer or file. This process is important and
should be done carefully to make a good flare.
(Fig. 8)
Fig. 8
15
Page 95
NOTE
Flare nut
Union
Apply the provided labels
to the indoor and outdoor
unit tubing connectors to
prevent errors in
connections.
Service valve on
narrow tube side
Service valve on
wide tube side
A
B
C
D
When reaming, hold the tube end downward and be sure that
no copper scraps fall into the tube. (Fig. 9)
Copper
tubing
(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.*
(Figs. 10 and 11)
(*Use “RIDGID” or equivalent.)
NOTE
A good flare should have the following characteristics:
G inside surface is glossy and smooth.
G edge is smooth.
G tapered sides are of uniform length.
3-4. Caution before Connecting Tubes Tightly
a) Be sure to apply a sealing cap or water-proof tape to
prevent dust or water from getting into the tubes before
they are used.
b) 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. 12)
If the special R410A
flare tool is used:
0 to 0.0196"
(0 to 0.5 mm)
Reamer
Fig. 9
If the previous flare tool
(clutch-type) is used:
0.0472" (1.2 mm)
Adjust so that the amount of tube
protrusion is as shown in the figure.
Fig. 10
Flare nut
Copper
tubing
Flare tool
Fig. 11
c) 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. 13)
3-5. Tubing Connections
a) Temporary connection:
Screw in 3 – 5 turns by hand. (Fig.14)
b) To fasten the flare nuts, apply specified torque as:
Table 4
Tube Dia. Tightening Torque
1/4" (6.35 mm) Approx. 120 – 160 lbs·in (140 – 180 kgf· cm)
3/8" (9.52 mm) Approx. 300 – 360 lbs·in (340 – 420 kgf· cm)
1/2" (12.70 mm) Approx. 430 – 540 lbs·in (490 – 610 kgf·cm)
5/8" (15.88 mm) Approx. 590 – 710 lbs·in (680 – 820 kgf·cm)
16
Fig. 14
Apply refrigerant
lubricant here and here
Fig. 12
Fig. 13
Page 96
IMPORTANT
Indoor unit
Outdoor unit
Spanner
Torque wrench
Insulation
CAUTION
Be sure to match refrigerant
Insulation tape (supplied)
Flare insulation (3/16"(T5, supplied) )
Flare insulation (1/8"(T3, supplied) )
Tube insulation
(not supplied)
Vinyl tie (supplied)
Flare nut
tubing and electric wiring
between indoor and outdoor
units.
Fig. 15
3-6. Insulation of Refrigerant Tubing
To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a
proper insulation material.
The thickness of the insulation should be a minimum 5/16"
(8 mm). (Fig. 16)
I For wall-mounted units
After connecting the refrigerant tubing to the outdoor unit
and performing a leak test on the connecting part, insulate it
with the tubing insulation. (Fig 17a)
I For ceiling-mounted cassette units
Wind the insulation tape around the flare nuts at the tube
connections. Secondly cover up the tubing connections
with the flare insulation (1/8" (T3, supplied)). Then wind the
other flare insulation (3/16" (T5, supplied)). Finally, fasten
the insulation at both ends with the supplied vinyl ties.
(Fig. 17b)
Min.
5/16"
(8 mm)
Insulation
Thickness:
min. 5/16"
(8 mm)
Fig. 16
Fig. 17a
Insulation material
The material used for insulation must have good insulation
characteristics, be easy to use, be age resistant, and must
not easily absorb moisture.
Fig. 17b
Drain hose insulation
and vinyl tie
(supplied)
Drain hose
and hose band
(supplied)
Drain pipe and insulation
(not supplied)
Vinyl tie (supplied)
Flare
insulation
The procedure used for installing
the insulation for both wide and
narrow tubes are the same.
Refrigerant tubing
and insulation
(not supplied)
Insulation tape
Fig. 17c
Never grasp the drain or refrigerant connecting outlets when moving the unit.
17
Page 97
CAUTION
3-7. Taping the Tubes
NOTE
Clamp
Insulated tubes
Apply putty here
Tubing
CAUTION
After a tube has been insulated,
never try to bend it into a narrow
curve, as this may cause the tube
to break or crack.
(1) At this time, the 2 refrigerant tubes (and electrical wire
if local codes permit) should be taped together with
armoring tape. The drain hose may also be included
and taped together as 1 bundle with the tubing.
(2) Wrap the armoring tape from the bottom of the outdoor
unit to the top of the tubing where it enters the wall. As
you wrap the tubing, overlap half of each previous tape
turn. (Fig. 18)
(3) Clamp the tubing bundle to wall, using 1 clamp approx.
every 47" (120 cm).
Do not wind the armoring tape too tightly, since this will
decrease the heat insulation effect. Also, be sure the condensation drain hose splits away from the bundle and drips
clear of the unit and the tubing.
Fig. 18
Fig. 19
3-8. Finishing the Installation
After finishing insulating and taping over the tubing, use
sealing putty to seal off the hole in the wall to prevent rain
and draft from entering. (Fig. 19)
4. Air Purging
Air and moisture remaining in the refrigerant system have
undesirable effects as indicated below. Therefore, they
must be purged completely.
G pressure in the system rises
G operating current rises
G cooling efficiency drops
G moisture in the air may freeze and block capillary tubing
G water may lead to corrosion of parts in the refrigerant
system
Air Purging with a Vacuum Pump
I
(for Test Run)
G In order to protect the earth’s environment, be sure to use
a vacuum pump to perform the air purge.
(Never perform an air purge by using the refrigerant gas
cylinder or other external gas, or by using the gas inside
the outdoor unit.)
Service
valve on
narrow
tube side
Service
valve on
wide tube
side
With push-pin
D
C
B
A
Hex wrench
Manifold gauge
(special for R410A)
Low-pressure
valve
Leave the
valve open.
Open
Charging hose
(special for R410A)
High-pressure valve
Vacuum pump
adapter
HiLo
(for preventing
reverse flow)
(special for
R410A)
Vacuum
pump
Fig. 20
In order to prevent charging errors
with the air conditioner that uses
R410A, the screw diameter at the
service valve charging port has
been changed. When recharging or
performing other servicing, use the
special charging hose and manifold
gauge.
18
Page 98
Cap tightening torque:
170 – 215 lbs·in
(200 – 250 kgf·cm)
(Tighten by hand, then
use a wrench to turn
approximately
45°.)
Stopper
Spindle
Service port
Screw diameter: 1/2
UNF 20 threads
Valve core
Cap nut tightening torque:
60 – 95 lbs·in
(70 – 110 kgf·cm)
(Tighten by hand, then use a
wrench to turn approximately 30 .)
<Structure of service valve on wide tube side>
NOTE
CAUTION
CAUTION
Perform the air purge for tubes A, B, C, and D. Use the same
CAUTION
CAUTION
procedures for all tubes.
(1) Check that each tube (both narrow and wide tubes)
between the indoor and outdoor units have been properly connected and all wiring for the test run has been
completed. Note that both narrow and wide tube service
valves on the outdoor unit are kept closed at this stage.
(2) Using an adjustable wrench or box wrench, remove the
valve caps from the service valve on both narrow and
wide tubes.
(3) Connect a vacuum pump and a manifold valve (with
pressure gauges) to the service port on the wide tube
service valve. (Fig. 20).
Before using the vacuum pump
adapter, read the vacuum pump
adapter manual, and use the
adapter correctly.
External diameter of service port
R410A: 5/16"
Fig. 21
Be sure to use a manifold valve for
air purging. If it is not available, use
a stop valve for this purpose. The
“Hi” knob of the manifold valve must
always be kept closed.
G When using a hex wrench to open the spindle, an
extremely small amount of refrigerant may leak.
This does not indicate a problem.
G Use a hex wrench of a type to which force can be
easily applied.
(4) With the “Lo” knob of the manifold valve open and high-pressure valve (“Hi”) closed completely, run the vacuum pump.
Run the pump until the pressure is –101 kPa (–76 cmHg). The operation time for the vacuum pump varies with tubing
length and the capacity of the pump. The following table shows the amount of time required for evacuation:
Table 5
Required time for evacuation when capacity
of 100 liter/h vacuum pump is used
20 min. or more
NOTE
The required time in Table 5 is calculated based on the
assumption that the ideal (or target) vacuum condition is
around 10 mmHg abs.
(5) With the vacuum pump still running, close the “Lo” knob of the manifold valve. Then stop the vacuum pump. Fully
close the low-pressure valve and stop the vacuum pump. (Wait 1 – 2 minutes and check that the manifold gauge
pointer does not return. If it does return, find and repair the leak, then apply the vacuum again.)
(6) With a hex wrench, turn the valve stem on the narrow tube service valve counter-clockwise by 90 degrees (1/4 turn)
for 10 seconds, and then turn the stem clockwise to close it again.
Be sure to completely insert the hex
wrench before attempting to turn the
valve.
(7) With a standard screwdriver, turn the wide tube service valve stem counterclockwise to fully open the valve.
(8) Turn the narrow tube service valve stem counter-clockwise to fully open the valve.
(9) Loosen the vacuum hose connected to the wide tube service port slightly to release the pressure. Then, remove
(10) Leak test all joints at the tubing (both indoor and outdoors) with liquid soap. Bubbles indicate a leak. Be sure to wipe
the hose.
off the soap with a clean cloth.
If a CFC gas detector is used, use a
special detector for HFC refrigerant
(such as R410A and R134a).
19
Page 99
(11) Replace the flare nut on the wide tube service port and fasten the flare nut securely with an adjustable wrench or
box wrench. Next, mount the valve cap and tighten it with a torque wrench (the cap needs to be tightened with the
torque of 180 lbs·in (200 kgf·cm)). This process is very important to prevent gas from leaking from the system.
(12) Test run the air conditioner. (See page 25.)
(13) While the air conditioner is running, apply liquid soap to check for any gas leaks around the service valves or caps.
(14) If there is no leakage, stop the air conditioner.
(15) Wipe off the soap on the tubing.
This completes air purging with a vacuum pump and the air conditioner is ready for actual operation.
I Pump Down
In order to protect the earth’s environment, be sure to perform pump-down to recover refrigerant
gas without releasing it into the atmosphere.
G When relocating or disposing of the air conditioner, request this
service from the dealer where the unit was purchased, or from an
appropriate agent. Perform pump-down as described below.
What is pump-down?
G Pump-down refers to recovering the refrigerant gas from the refrig-
erant cycle at the outdoor unit. This work must be performed during cooling operation. The refrigerant gas cannot be recovered
during heating operation.
G During winter, or if the temperature sensor prevents cooling opera-
tion, perform “forced cooling operation.”
Pump-down procedure
(1) Fully close the spindles at the valves on the narrow tube side of
tubes A, B, C and D. (Refer to Fig. 22.)
(2) Connect the manifold gauge to the charging port at the valve on
the wide tube side of tube D. Purge the air from the charging hose.
(Refer to Fig. 23.)
(3) Perform cooling operation or forced cooling operation.
When the pressure at the low-pressure side is 0.05 – 0.1 MPaG
(0.5 – 1 kg/cm
2
G), fully close the spindles at the valves on the
wide tube side of tubes A, B, C, and D, and immediately stop
operation. (Refer to Fig. 23.)
In the winter, the outdoor unit may stop after 5 - 10 minutes of
operation. This is in order to protect the indoor unit heat
exchanger from freezing and does not indicate a problem.
Narrow tube side
Charging port
Wide tube side
Charging hose
Cap
Close
D
Close
C
Close
B
Close
A
Fig. 22
D
C
B
A
Manifold gauge
Fig. 23
(4) Disconnect the manifold gauge and the inter-unit tubes, and
attach the caps and flare nuts. At this point, pump-down is completed. (If the caps and flare nuts are not reattached, there is the
danger of gas leakage.) (Refer to Fig. 24.)
If pump-down is not possible
If the air conditioner cannot be operated because of a malfunction or
other cause, use a refrigerant recovery device to recover the refrigerant.
20
Cap
Cap
Cap
After disconnecting
the inter-unit tubes,
attach the flare nuts
with flare bonnets.
Fig. 24
Page 100
5. Wiring Instructions
5-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as
shown on its nameplate, then carry out the wiring
closely following the wiring diagram.
(2) Provide a power outlet to be used exclusively for each
unit, with a power supply disconnect and circuit breaker for overcurrent protection provided in the exclusive
line.
(3) To prevent possible hazard due to insulation failure,
the unit must be grounded.
(4) Each wiring connection must be done tightly and in
accordance with the wiring system diagram. Wrong
wiring may cause the unit to misoperate or become
damaged.
(5) Do not allow wiring to touch the refrigerant tubing,
compressor, or any moving parts of the fan.
(6) Unauthorized changes in the internal wiring can be
very dangerous. The manufacturer will accept no
responsibility for any damage or misoperation that
occurs as a result of such unauthorized changes.
5-2. Recommended Wire Length and Diameter
Regulations on wiring diameter differ from locality to locality.
For field wiring requirements, please refer to your local electrical codes. Carefully observe these regulations when carrying out the installation.
Table 6 shows maximum wire lengths for control line and
power line and fuse or circuit capacity.
NOTE
Refer to the wiring system diagram (Fig. 25a or 25b) for the
meaning of (A), (B), and (C) in Table 6.
Refer to your local codes or in the absence of local codes
see the National Electric Code: ANSI/NFPA70.
Table 6
Model
AWG
Max. Power Line Length (ft.)
(A)
Max. Control Line Length (ft.)
(B) (C)
Fuse
or
)41#()21#(
# ... AWG (American Wire Gauge)
Circuit Capacity
A 51).xaM( 28).xaM( 58A2791MC
A 02).xaM( 28).xaM( 58A2742MC
A 02).xaM( 001).xaM( 58A2713MC
21
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