Sanyo CMH1972, CMH2472, CMH3172, KMHS0772, KMHS0972 Technical & Service Manual

IMPORTANT

These air conditioners employ new refrigerant R410A.

Pay special attention when servicing the unit.

●

Wall mounted type KMHS0772 KMHS0972 KMHS1272 KMHS1872 KMHS2472

< Applicable Indoor Units >

TECHNICAL & SERVICE MANUAL

OUTDOOR UNIT : CMH1972

CMH2472 CMH3172

DC INVERTER MULTI-SYSTEM AIR CONDITIONER

FILE NO.

Destination: North America

Product Code No.

1 852 330 30

1 852 330 31

1 852 330 32

REFERENCE NO.

SM700660-04

Capacity at 230V

19,100 BTU/h

23,200 BTU/h

30,600 BTU/h

Outdoor Model No.

CMH1972

CMH2472

CMH3172

NOTE

CMH1972

CMH2472

CMH3172

For details about the combination, refer to "Unit Combination Table" in the Appendix of this manual.

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

SPECIAL PRECAUTIONS

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.

CAUTION

WARNING

Important! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

Carefully read this instruction booklet before beginning. Follow each installation or repair step exactly as shown. Observe all local, state, and national electrical codes. Pay close attention to all warning and caution notices given in this manual.

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.

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.

Install a protective leakage breaker depending on the installation location (especially a damp or humid location). If a leakage breaker is not installed, electric shock can occur.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Installing

In a 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 (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

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

Tu rn 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.

•

2

Table of Contents

4 5

6 12 15

16

19

22 36 39

42

45 50

53 54 55 56 60

61 62 63 63 64 66 67 67

A-1 A-2

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Page

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 5-3. Heating 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

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

3

APPLICABLE INDOOR UNITS

CMH1972

CMH2472

CMH3172

Multi-Outdoor Unit

Indoor Unit

3-Room

4-Room

KMHS0772

YES

NO

YES

KMHS0972 KMHS1272 KMHS1872 KMHS2472

NOTE

The table lists the wall-mounted type of indoor units as representative models.

4

95 °F D.B. / 71 °F W.B.

67 °F D.B. / 57 °F W.B.

80 °F D.B. / 67 °F W.B.

_

D.B . / _ W.B.

1. OPERATING RANGE

Maximum

Minimum

Maximum

Minimum

115 °F D.B.

67 °F D.B.

75 °F D.B. / 65 °F W.B.

0 °F D.B.

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Heating

5

2. SPECIFICATIONS

2-1. Unit Specifications

Outdoor Unit CMH1972 Indoor Unit KMHS0972

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment Ib. (g) Refrigerant Control

( 11,600 to 24,800 ) ( 3.40 to 7.30 )

6.7

1,500

7.7

1,735

19,100

5.60

24,800

7.30

( 9,800 to 19,100 ) ( 2.90 to 5.60 )

Shipping Volume

Cooling Heating

16,300

2,800

Cooling Heating

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg) Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

230V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity Latent Capacity

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

143.3

152.1

12.71

(65.0) (69.0) (0.36)

(740

× 900 × 320)

33-27/32

× 40-5/8 × 16-1/4

(860

× 1,032 × 413)

29-1/8

× 35-7/16 × 12-19/32

1/4 (6.35)

× 3

3/8 (9.52)

× 3

ft. (m)Max. allowable tubing length per unit

Flare Type

82 (25)

R410A / 6.17 (2,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

dB-A

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 98 98

A 14.5

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 13 -

3-Room Multi Outdoor UnitType

3Number of Connectable Indoor Units

3Number of Operatable Indoor Units

1,707 (2,900) 1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 50 / 52

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 : KMHS0972 3units Outdoor Unit : CMH1972 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 230V >

6

Outdoor Unit CMH1972 Indoor Unit KMHS0972

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment Ib. (g) Refrigerant Control

( 11,600 to 24,800 ) ( 3.40 to 7.30 )

7.4

1,500

8.5

1,735

19,100

5.60

24,800

7.30

( 9,800 to 19,100 ) ( 2.90 to 5.60 )

Shipping Volume

Cooling Heating

16,300

2,800

Cooling Heating

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg) Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

208V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity Latent Capacity

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

143.3

152.1

12.71

(65.0) (69.0) (0.36)

(740

× 900 × 320)

33-27/32

× 40-5/8 × 16-1/4

(860

× 1,032 × 413)

29-1/8

× 35-7/16 × 12-19/32

1/4 (6.35)

× 3

3/8 (9.52)

× 3

ft. (m)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 (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 98 98

A 14.5

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 13 -

3-Room Multi Outdoor UnitType

3Number of Connectable Indoor Units

3Number of Operatable Indoor Units

1,707 (2,900) 1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 50 / 52

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 : KMHS0972 3units Outdoor Unit : CMH1972 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 208V >

dB-A

7

Outdoor Unit CMH2472 Indoor Unit KMHS0972

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment Ib. (g) Refrigerant Control

( 11,600 to 29,200 ) ( 3.40 to 8.60 )

9.0

2,040

10.1

2,270

23,200

6.80

29,200

8.60

( 9,800 to 23,200 ) ( 2.90 to 6.80 )

Shipping Volume

Cooling Heating

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg) Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

230V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity Latent Capacity

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

143.3

152.1

12.71

(65.0) (69.0) (0.36)

(740

× 900 × 320)

33-27/32

× 40-5/8 × 16-1/4

(860

× 1,032 × 413)

29-1/8

× 35-7/16 × 12-19/32

1/4 (6.35)

× 4

3/8 (9.52)

× 3 + 1/2 (12.7) × 1

ft. (m)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 (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 98 98

A 14.5

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 13 -

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

3Number of Operatable Indoor Units

1,707 (2,900) 1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 50 / 52

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 : KMHS0972 3units Outdoor Unit : CMH2472 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 230V >

19,600

3,600

dB-A

8

Outdoor Unit CMH2472 Indoor Unit KMHS0972

× 3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment Ib. (g) Refrigerant Control

( 11,600 to 29,200 ) ( 3.40 to 8.60 )

10.0

2,040

11.1

2,270

23,200

6.80

29,200

8.60

( 9,800 to 23,200 ) ( 2.90 to 6.80 )

Shipping Volume

Cooling Heating

19,600

3,600

Cooling Heating

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg) Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

208V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity Latent Capacity

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

143.3

152.1

12.71

(65.0) (69.0) (0.36)

(740

× 900 × 320)

33-27/32

× 40-5/8 × 16-1/4

(860

× 1,032 × 413)

29-1/8

× 35-7/16 × 12-19/32

1/4 (6.35)

× 4

3/8 (9.52)

× 3 + 1/2 (12.7) × 1

ft. (m)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 (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 98 98

A 14.5

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 13 -

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

3Number of Operatable Indoor Units

1,707 (2,900) 1,707 (2,900)Air Circulation (High) ft3/min (m3/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 50 / 52

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 : KMHS0972 3units Outdoor Unit : CMH2472 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 208V >

dB-A

9

Outdoor Unit CMH3172 Indoor Unit KMHS0972

× 4

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment Ib. (g) Refrigerant Control

( 11,600 to 32,000 ) ( 3.40 to 9.40 )

12.3

2,800

10.3

2,350

30,600

9.00

32,000

9.40

( 9,800 to 30,600 ) ( 2.90 to 9.00 )

Shipping Volume

Cooling Heating

25,800

4,800

Cooling Heating

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg) Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

230V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity Latent Capacity

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

180.8

189.6

15.18

(82.0) (86.0) (0.43)

(890

× 900 × 320)

39-3/4

× 40-5/8 × 16-1/4

(1,010

× 1,032 × 413)

35-1/32

× 35-7/16 × 12-19/32

1/4 (6.35)

× 4

3/8 (9.52)

× 2 + 1/2 (12.7) × 2

ft. (m)Max. allowable tubing length per unit

Flare Type

100 (30.5)

R410A / 8.38 (3,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 99 99

A 17.0

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 16 -

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

1,942 (3,300) 1,807 (3,070)Air Circulation (High) ft3/min (m3/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 53 / 52

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 : KMHS0972 4units Outdoor Unit : CMH3172 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 230V >

dB-A

10

Outdoor Unit CMH3172 Indoor Unit KMHS0972

× 4

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Compressor Refrigerant / Amount charged at shipment Ib. (g) Refrigerant Control

( 11,600 to 32,000 ) ( 3.40 to 9.40 )

13.6

2,800

11.4

2,350

28,600

8.40

32,000

9.40

( 9,800 to 28,600 ) ( 2.90 to 8.40 )

Shipping Volume

Cooling Heating

24,200

4,400

Cooling Heating

Net Shipping

Package Dimensions

Weight

Height

× Width × Depth

Height

× Width × Depth

Ib. (kg) Ib. (kg)

cu.ft (m

3

)

(mm)

inch

(mm)

208V Single-Phase 60Hz

inch

-

187 to 253

Dimensions & Weight (Outdoor Unit)

Refrigerant Tubing Connections

Unit Dimensions

Electrical Rating

Sensible Capacity Latent Capacity

WPower Input

V A

Available Voltage Range Running Amperes

Narrow tube Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

180.8

189.6

15.18

(82.0) (86.0) (0.43)

(890

× 900 × 320)

39-3/4

× 40-5/8 × 16-1/4

(1,010

× 1,032 × 413)

35-1/32

× 35-7/16 × 12-19/32

1/4 (6.35)

× 4

3/8 (9.52)

× 2 + 1/2 (12.7) × 2

ft. (m)Max. allowable tubing length per uint

Flare Type

100 (30.5)

R410A / 8.38 (3,800)

Electric Expansion Valve

DC Twin Rotary (Inverter)

Fan Speeds Auto (Hi, Me, Lo)

Control Microprocessor

Features (Outdoor Unit)

HSPF

Compressor Locked Rotor Amperes

BTU/Wh

BTU/h

Performance

- 7.7

%Power Factor 99 99

A 17.0

Voltage Rating

BTU/h

kW

Total Capacity

BTU/h

SEER BTU/Wh 16 -

4-Room Multi Outdoor UnitType

4Number of Connectable Indoor Units

4Number of Operatable Indoor Units

1,942 (3,300) 1,807 (3,070)Air Circulation (High) ft3/min (m3/h)

Fuse or Circuit Breaker Capacity A 20

Operation Sound (High) Cool/Heat 53 / 52

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 : KMHS0972 4units Outdoor Unit : CMH3172 1unit

2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B Heating : Indoor air temp. 70°F D.B.

Outdoor air temp. 95°F D.B./ 75°F W.B. Outdoor air temp. 47°F D.B./ 43°F W.B.

< 208V >

dB-A

11

Outdoor Unit CMH1972

2-2-1. Outdoor Unit

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMH1972

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Pints (cc)

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

FV50S ... 1.91 (900)

-

Internal Controller

Yes Yes

Aluminum Plate Fin / Copper Tube

2

18.1

Face Area

ft

2

(m2)

6.40 (0.595)

Coil

Rows Fins per inch

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

Compressor Oil ... Amount

8

90

750 / 750

Ohm

DC Motor

Type Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 68 °F (20 °C))

Ohm

DC Twin Rotary (Hermetic)

5KD240XAB21 / 1,700W

U - V : V - W : W - U :

0.720

0.708

0.726

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes Yes Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

-

230V 30W

1 ... D18-1/8 (D460)

Fan

Propeller

Q'ty ... Dia. inch (mm)

Type

Type Over-Current Protection Over-Heat Protection

(Ambient Temp. 68 °F (20 °C))

Fan Motor

Nominal Output Coil Resistance

Safety Device

Rough Measure RPM (Cool / Heat)

Run Capacitor

Type Model ... Q'ty No. of Poles

W

2-2. Major Component Specifications

12

Outdoor Unit CMH2472

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMH2472

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Pints (cc)

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

FV50S ... 1.91 (900)

-

Internal Controller

Yes Yes

Aluminum Plate Fin / Copper Tube

2

18.1

Face Area

ft

2

(m2)

6.40 (0.595)

Coil

Rows Fins per inch

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

Compressor Oil ... Amount

8

90

750 / 750

Ohm

DC Motor

Type Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 68 °F (20 °C))

Ohm

DC Twin Rotary (Hermetic)

5KD240XAB21 / 1,700W

U - V : V - W : W - U :

0.720

0.708

0.726

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes Yes Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

-

230V 30W

1 ... D18-1/8 (D460)

Fan

Propeller

Q'ty ... Dia. inch (mm)

Type

Type Over-Current Protection Over-Heat Protection

(Ambient Temp. 68 °F (20 °C))

Fan Motor

Nominal Output Coil Resistance

Safety Device

Rough Measure RPM (Cool / Heat)

Run Capacitor

Type Model ... Q'ty No. of Poles

W

13

Outdoor Unit CMH3172

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 25A

CB-CMH3172

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Pints (cc)

-

Micro F

VAC

External Finish Acrylic baked-on enamel finish

FV50S ... 2.55 (1,200)

-

Internal Controller

Yes Yes

Aluminum Plate Fin / Copper Tube

2

18.1

Face Area

ft

2

(m2)

7.75 (0.72)

Coil

Rows Fins per inch

Heat Exchanger Coil

SIC-71FW-D490-1 ... 1

Compressor Oil ... Amount

8

90

800 / 750

Ohm

DC Motor

Type Compressor Model / Nominal Output

Compressor

Coil Resistance (Ambient Temp. 68 °F (20 °C))

Ohm

DC Twin Rotary (Hermetic)

5JD420XAB22 / 3,000W

U - V : V - W : W - U :

0.435

0.441

0.452

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Safety Device

Micro F

VAC

Run Capacitor

Crankcase Heater

Yes Yes Yes

Overload Relay

CS-7LN115

Model

Operation Temp.

Open : 239 °F (115 °C), Close : 212 °F (100 °C)

-

230V 30W

1 ... D18-1/8 (D460)

Fan

Propeller

Q'ty ... Dia. inch (mm)

Type

Type Over-Current Protection Over-Heat Protection

(Ambient Temp. 68 °F (20 °C))

Fan Motor

Nominal Output Coil Resistance

Safety Device

Rough Measure RPM (Cool / Heat)

Run Capacitor

Type Model ... Q'ty No. of Poles

W

14

Temperature F ( C)

40

35

30

25

20

15

10

5

0

(

-

20)(-15)(-10) (-5) (0) (5) (10) (15) (20)

-

451423 32 41 50 59 68

Resistance (k ohm)

0

32 50 68 86 104 122 140 158 176 194

40

60

80

100

120

140

160

180

200

20

Resistance (k ohm)

(0) (10) (20) (30) (40) (50) (60)(70) (80) (90)

Temperature F ( C)

2-3. Other Component Specifications

CMH1972 CMH2472 CMH3172

Sensor Name

Compressor temp sensor TKS293B

Model No.

of sensor

11

Quantity of Sensor

1

Outdoor air temp sensor

Outdoor heat exchanger sensor

AW / AN sensor

BW / BN sensor

CW / CN sensor

DW / DN sensor

TKS295B

TKS292B

Model No.

of sensor

Sensor Name

1

1 / 1

0

Quantity of Sensor

1

1 / 1

1

1 / 1

CMH1972 CMH2472 CMH3172

15

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

5-ID:15/16

1-3/8

2-15/16

2-1/16

3. DIMENSIONAL DATA

Outdoor Unit CMH1972

Unit: inch(mm)

16

Wide tube service valve dia.3/8" (9.52) × 3

Narrow tube service valve dia.1/4" (6.35) × 4

Wide tube service valve dia.1/2" (12.70) × 1

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

5-ID:15/16

1-3/8

2-15/16

2-1/16

2-13/32

Outdoor Unit CMH2472

Unit: inch(mm)

17

Wide tube service valve dia.3/8" (9.52) × 2

Narrow tube service valve dia.1/4" (6.35) × 4

Wide tube service valve dia.1/2" (12.70) × 2

4-7/16

5-29/32 2-7/8 2-3/4

2-3/4

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

5-ID:15/16

1-3/8

2-15/16

2-1/16

2-13/32

Outdoor Unit CMH3172

Unit: inch(mm)

18

Compressor

4-way valve

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.3/8"

Heat exchanger

Cooling cycle

Heating cycle

Defrosting cycle

Indoor unit Outdoor unit

Defrost valve for hot gas bypass

Strainer Header

Header

S

M

Wide tube

Narrow tube

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Outdoor Unit CMH1972

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

19

4-way valve

High pressure

switch

H.P.

Defrost valve for hot gas bypass

Outdoor Unit CMH2472

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

Compressor

Main accumulator

Sub accumulator

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.3/8"

O.D.1/2"

Heat exchanger

Cooling cycle

Heating cycle

Defrosting cycle

Strainer Header

Header

S

M

Indoor unit Outdoor unit

Wide tube

Narrow tube

20

Compressor

Main accumulator

Sub accumulator

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.3/8"

O.D.1/2"

Heat exchanger

Cooling cycle

Heating cycle

Defrosting cycle

Strainer Header

Header

S

M

4-way valve

High pressure

switch

H.P.

Defrost valve for hot gas bypass

Indoor unit Outdoor unit

Wide tube

Narrow tube

Outdoor Unit CMH3172

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

21

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

174

(1.2)

188

(1.3)

160

(1.1)

146

(1.0)

77

(25)

86

(30)

95

(35)

104 (40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

Lo fan Hi fan HH fan

506 (3.5)

434 (3.0)

362 (2.5)

290 (2.0)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

4

5

3

2

Lo fan Hi fan HH fan

7

8

6

5

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

Lo fan Hi fan HH fan

Outdoor Unit CMH1972 Indoor Unit KMHS0772 × 1

5-1-1. Temperature Charts (CMH1972)

77

(25)

86

(30)

95

(35)

104 (40)

77

(25)

86

(30)

95

(35)

104 (40)

5. PERFORMANCE DATA

5-1. Temperature Charts

Indoor air tem

p. 86

°F (30

°C

)

80

°F (27

°C)

75

°F (24

°C)

Indoor air temp. 86

°F (30°C)

80°F (27°C)

75°F (24°C)

Indoor air temp. 86

°F (30°C)

80°F (27°C)

75°F (24°C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air tem

p. 73

°F (23

°C

)

70

°F (21

°C

)

63

°F (17

°C

)

Indoor air tem

p. 73

°F

(23

°C

)

70

°F (21

°C)

63

°F

(17

°C

)

Indoor air temp. 73

°F (23

°C)

70°F (21

°C)

63°F (17

°C)

22

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

5

6

4

3

Lo fan Hi fan

7

8

6

5

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

Outdoor Unit CMH1972 Indoor Unit KMHS0972 × 1

HH fan

174

(1.2)

188

(1.3)

160

(1.1)

146

(1.0)

77

(25)

86

(30)

95

(35)

104 (40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

506

(3.5)

434

(3.0)

362

(2.5)

290

(2.0)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

77

(25)

86

(30)

95

(35)

104 (40)

77

(25)

86

(30)

95

(35)

104 (40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

Indoor air temp. 86°F (30°C)

80°F (27°C)

75°F (24°C)

Indoor air temp. 86

°F (30

°C)

80°F (27

°C)

75°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27

°C)

75°F (24°C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

7070°F (21F (21°C)C)

6363°F (17F (17°C)C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

7070°F (21F (21°C)C)

63°F (17°C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

7070°F (21F (21°C)C)

63°F (17°C)

Indoor air temp. 73

°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73

°F (23

°C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73

°F (23°C)

70

°F (21

°C)

63°F (17°C)

23

Outdoor Unit CMH1972 Indoor Unit KMHS1272 × 1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

506

(3.5)

578

(4.0)

434

(3.0)

362

(2.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

5

6

4

3

Lo fan Hi fan

7

9

3

5

8

10

4

6

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

HH fan

160

(1.1)

174

(1.2)

146

(1.0)

132

(0.9)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75°F (24

°C)

Indoor air temp. 86

°F (30°C)

80

°F (27

°C

)

75°F (24

°C)

Indoor air tem

p. 86

°F (30

°C)

80°F (27°C)

75°F (24

°C)

Indoor air temp. 73°F (23°C)

63°F (17°C)C)

Indoor air temp. 73°F (23°C)

63°F (17°C)

Indoor air temp. 73Indoor air temp. 73°F (23°C)C)

63°F (17°C)C)

Indoor air temp. 73

°F (23

°C)

63°F (17°C)

Indoor air temp. 73

°F (23

°C)

63°F (17°C)

Indoor air temp. 73

°F (23°C)

63

°F (17

°C)

20°F (21°C)C)70°F (21°C)

70°F (21°C)C)70°F (21°C)

70°F (21°C)70

°F (21

°C)

24

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

160

(1.1)

174

(1.2)

146

(1.0)

132

(0.9)

Lo fan Hi fan

506

(3.5)

578

(4.0)

434

(3.0)

362

(2.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

7

8

6

5

Lo fan Hi fan

10

12

6

8

9

11

7

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

Outdoor Unit CMH1972 Indoor Unit KMHS1872 × 1

HH fan

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75

°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C

)

75°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75°F (24°C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

70°F (21°C

)

C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

6363°F (17F (17°C)C)

Indoor air temp. 73°F (23°C)

7070°F (21F (21°C)C)

6363°F (17F (17°C)C)

Indoor air temp. 73

°F (23

°C)

70

°F (21

°C

)

63°F (17°C)

Indoor air temp. 73

°F (23

°C)

70°F (21

°C)

63°F (17

°C)

Indoor air temp. 73

°F (23°C)

70°F (21

°C)

63°F (17°C)

25

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

174

(1.2)

188

(1.3)

160

(1.1)

146

(1.0)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

Lo fan Hi fan HH fan

506

(3.5)

434

(3.0)

362

(2.5)

290

(2.0)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

4

5

3

2

Lo fan Hi fan HH fan

7

8

6

5

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

Lo fan Hi fan HH fan

Outdoor Unit CMH2472 Indoor Unit KMHS0772 × 1

5-1-2. Temperature Charts (CMH2472)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

Indoor air temp. 86°F (30°C)

80°F (27

°C)

75

°F

(2

4°C

)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75

°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27

°C)

75°F (24°C)

Indoor air temp. 73Indoor air temp. 73°F (23°C)

7070°F (21F (21°C)C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

7070°F (21F (21°C

)

C)

6363°F (17F (17°C)C)

Indoor air tem

p. 73

Indoor air temp. 73°F (23°C

)

C)

70°F (21°C)

6363°F (17F (17°C)C)

Indoor air temp. 73°F (23°C)

70°F (21

°C)

63

°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70

°F (21

°C

)

63°F (17°C)

Indoor air tem

p. 73

°F (23

°C

)

70°F (21

°C)

63°F (17°C)

26

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

5

6

4

3

Lo fan Hi fan

7

8

6

5

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

Outdoor Unit CMH2472 Indoor Unit KMHS0972 × 1

HH fan

174

(1.2)

188

(1.3)

160

(1.1)

146

(1.0)

77

(25)

86

(30)

95

(35)

104 (40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

506

(3.5)

434

(3.0)

362

(2.5)

290

(2.0)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

77

(25)

86

(30)

95

(35)

104 (40)

77

(25)

86

(30)

95

(35)

104 (40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

Indoor air temp. 86

°F (30°C)

80°F (27

°C)

75°F (24°C)

Indoor air tem

p. 86

°F (30

°C)

80°F (27

°C)

75°F (24°C)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75°F (24°C)

Indoor air tem

p. 73

Indoor air temp. 73°F (23°C

)

C)

70°F (21°C)

6363°F (17F (17°C)C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

7070°F (21F (21°C)C)

6363°F (17F (17°C)C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)

7070°F (21F (21°C)C)

6363°F (17F (17°C)C)

Indoor air tem

p. 73

°F (23

°C

)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17

°C)

27

Outdoor Unit CMH2472 Indoor Unit KMHS1272 × 1

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

506

(3.5)

578

(4.0)

434

(3.0)

362

(2.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

5

6

4

3

Lo fan Hi fan

7

9

3

5

8

10

4

6

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

HH fan

160

(1.1)

174

(1.2)

146

(1.0)

132

(0.9)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75°F (24

°C)

Indoor air temp. 86

°F (30°C)

80°F (27°C)

75°F (24°C)

Indoor air tem

p. 86

°F (30

°C

)

80°F (27°C)

75

°F (24

°C

)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

70°F (21°C)C)

63°F (17°C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

70°F (21°C)C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

70°F (21°C

)

C)

6363°F (17F (17°C)C)

Indoor air temp. 73

°F (23

°C)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70

°F (21

°C

)

63°F (17

°C)

28

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

160

(1.1)

174

(1.2)

146

(1.0)

132

(0.9)

Lo fan Hi fan

506

(3.5)

578

(4.0)

434

(3.0)

362

(2.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

7

8

6

5

Lo fan Hi fan

10

12

6

8

9

11

7

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

Outdoor Unit CMH2472 Indoor Unit KMHS1872 × 1

HH fan

77

(25)

86

(30)

95

(35)

104 (40)

77

(25)

86

(30)

95

(35)

104 (40)

77

(25)

86

(30)

95

(35)

104 (40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air tem

p. 86

°F (30

°C)

80°F (27

°C)

75°F (24°C)

Indoor air temp. 86

°F (30°C)

80°F (27

°C)

75

°F (24

°C)

Indoor air tem

p. 86

°F (30

°C

)

80°F (27

°C)

75

°F (24

°C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

70°F

(21

F (21°C

)

C)

6363°F

(17

F (17°C

)

C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

70°F (21°C)

63°F (17°C)C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73

°F (23°C)

70

°F (21

°C

)

6

3°F

(17

°C

)

Indoor air temp. 73

°F (23°C)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70

°F (21

°C)

63°F (17°C)

29

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

160

(1.1)

174

(1.2)

146

(1.0)

132

(0.9)

Lo fan Hi fan

506

(3.5)

578

(4.0)

434

(3.0)

362

(2.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

8

9

7

6

Lo fan Hi fan

12

14

8

10

11

13

9

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

Outdoor Unit CMH2472 Indoor Unit KMHS2472 × 1

HH fan

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75

°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75

°F (24

°C)

Indoor air tem

p. 73

Indoor air temp. 73°F (23°C)C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

7070°F (21F (21°C)C)

63°F (17°C)

Indoor air tem

p. 73

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air tem

p. 73

°F (23

°C)

70

°F (21

°C

)

63°F (17°C)

Indoor air temp. 73

°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air tem

p. 73

°F (23

°C)

70°F (21

°C)

63

°F (17

°C)

30

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

146

(1.0)

174

(1.2)

118

(0.8)

90

(0.6)

Lo fan Hi fan Hi fan HH fan

434

(3.0)

506

(3.5)

362

(2.5)

290

(2.0)

218

(1.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

4

5

3

8

9

7

6

5

4

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Outdoor Unit CMH3172 Indoor Unit KMHS0772 × 1

5-1-3. Temperature Charts (CMH3172)

Lo fan Hi fan Hi fan HH fan

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C

)

75°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75°F (24°C)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75

°F (24

°C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

6363°F (17F (17°C)C)

Indoor air temp. 73Indoor air temp. 73°F (23°C)

70°F (21°C)

6363°F (17F (17°C)C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)C)

Indoor air temp. 73

°F (23°C)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73

°F (23°C)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70

°F (21

°C)

63°F (17

°C)

31

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

146

(1.0)

174

(1.2)

118

(0.8)

90

(0.6)

Lo fan Hi fan Hi fan HH fan

434

(3.0)

506

(3.5)

362

(2.5)

290

(2.0)

218

(1.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

4

5

3

7

8

6

5

4

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Outdoor Unit CMH3172 Indoor Unit KMHS0972 × 1

Lo fan Hi fan Hi fan HH fan

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75

°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75°F (24°C)

Indoor air temp. 86°F (30°C)

80°F (27

°C)

75

°F (24

°C)

Indoor air temp. 73°F (23°C)

7070°F (21F (21°C)C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

7070°F (21F (21°C)C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

70°F (21F (21°C)C)

6363°F (17F (17°C)C)

Indoor air temp. 73

°F (23

°C)

70°F (21

°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70°F (21

°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70

°F (21

°C)

63°F (17

°C)

32

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

146

(1.0)

174

(1.2)

118

(0.8)

90

(0.6)

Lo fan Hi fan Hi fan HH fan

434

(3.0)

506

(3.5)

362

(2.5)

290

(2.0)

218

(1.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

4

5

6

3

12

13

10

11

9

8

7

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Outdoor Unit CMH3172 Indoor Unit KMHS1272 × 1

Lo fan Hi fan Hi fan HH fan

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C)

75°F (24°C)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75

°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75°F (24°C)

Indoor air temp. 73Indoor air temp. 73°F (23°C)C)

70°F (21°C)

63°F (17°C)C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

7070°F (21F (21°C)C)

63°F (17°C)

Indoor air temp. 73

°F (23°C)

70

°F (21

°C)

63

°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70°F (21°C)

63°F (17

°C)

(3) Indoor discharge air performance chart

33

146

(1.0)

174

(1.2)

118

(0.8)

90

(0.6)

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

434

(3.0)

506

(3.5)

362

(2.5)

290

(2.0)

218

(1.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

6

5

7

8

9

4

14

12

13

11

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Outdoor Unit CMH3172 Indoor Unit KMHS1872 × 1

Lo fan Hi fan

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

77

(25)

86

(30)

95

(35)

104

(40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27°C)

75°F (24°C)

Indoor air temp. 86

°F (30

°C)

80

°F (27

°C

)

75

°F (24

°C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

70°F (21°C)C)

63°F (17°C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

7070°F (21F (21°C)C)

6

363°F

(1

7

F (17°C

)

C)

Indoor air temp. 73

°F (23

°C)

70°F (21°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70

°F (21

°C)

63°F (17°C)

Indoor air temp. 73

°F (23

°C)

70°F (21

°C)

6

3

°F

(1

7

°C

)

34

146

(1.0)

174

(1.2)

118

(0.8)

90

(0.6)

Cooling Characteristics

(RH : 46%, Indoor fan speed : High fan) (230V, 60Hz)

Heating Characteristics

(RH : 85%, Indoor fan speed : High fan) (230V, 60Hz)

(1) Low pressure performance chart (1) High pressure performance chart

(2) Operating current performance chart (2) Operating current performance chart

(3) Indoor discharge air performance chart (3) Indoor discharge air performance chart

• 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.

NOTE

Low pressure at wide tube service valve

psig (MPaG)

High pressure at wide tube service valve

psig (MPaG)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Lo fan Hi fan

434

(3.0)

506

(3.5)

362

(2.5)

290

(2.0)

218

(1.5)

Operating current (A)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

9

8

10

11

12

14

12

13

11

Indoor discharge air temperature °F (°C)

Outdoor air temperature °F (°C) Outdoor air temperature °F (°C)

Outdoor Unit CMH3172 Indoor Unit KMHS2472 × 1

Lo fan Hi fan

77

(25)

86

(30)

95

(35)

104 (40)

77

(25)

86

(30)

95

(35)

104 (40)

77

(25)

86

(30)

95

(35)

104 (40)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

23

(-5)32(0)41(5)50(10)59(15)68(20)77(25)

77(25)

131(55)

140(60)

122(50)

113(45)

104(40)

95(35)

86(30)

46.4( 8)

68.0(20)

64.4(18)

60.8(16)

57.2(14)

53.6(12)

50.0(10)

Indoor air temp. 86°F (30°C)

80°F (27

°C)

75°F (24

°C)

Indoor air temp. 86

°F (30

°C)

80°F (27

°C)

75

°F (24

°C

)

Indoor air tem

p. 86

°F (30

°C)

80°F (27

°C)

75°F (24

°C)

Indoo

r a

ir tem

p. 73

Indoor air temp. 73°F

(23

F (23°C

)

C)

70°F (21°C)

6363°F (17F (17°C)C)

Indoor air temp. 73°F (23°C)

70°F (21°C)

63°F (17°C)

Indoor air temp. 73Indoor air temp. 73°F (23F (23°C)C)

70°F (21°C)

63°F (17°C)

Indoo

r a

ir tem

p. 73

°F

(23

°C

)

70°F (21

°C)

63°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70°F (21

°C)

63

°F (17

°C)

Indoor air temp. 73

°F (23

°C)

70°F (21

°C)

63°F (17°C)

35

Outdoor Unit : CMH1972 Indoor Unit : KMHS0972 × 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: 19,100 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 19,180 18,500 17,770 17,210 16,350 15,440

72 (22.2) SHC 17,130 16,960 16,610 16,270 15,930 15,440

59 76 (24.4) SHC 19,180 18,500 17,770 17,210 16,350 15,440

(15.0) 80 (26.7) SHC 19,180 18,500 17,770 17,210 16,350 15,440

84 (28.9) SHC 19,180 18,500 17,770 17,210 16,350 15,440 88 (31.1) SHC 19,180 18,500 17,770 17,210 16,350 15,440

TC 20,150 19,450 18,700 18,140 17,250 16,290

72 (22.2) SHC 14,040 13,700 13,360 13,190 12,840 12,330

63 76 (24.4) SHC 16,960 16,610 16,270 16,100 15,760 15,410

(17.2) 80 (26.7) SHC 20,040 19,450 18,700 18,140 17,250 16,290

84 (28.9) SHC 20,150 19,450 18,700 18,140 17,250 16,290 88 (31.1) SHC 20,150 19,450 18,700 18,140 17,250 16,290

TC 21,140 20,420 19,640 # 19,100 18,180 17,180

72 (22.2) SHC 10,610 10,440 10,100 9,930 9,590 9,240

67 76 (24.4) SHC 13,700 13,360 13,010 12,840 12,500 12,160

(19.4) 80 (26.7) SHC 16,790 16,440 16,270 15,930 15,760 15,240

84 (28.9) SHC 19,700 19,530 19,190 19,010 18,180 17,180 88 (31.1) SHC 21,140 20,420 19,640 19,100 18,180 17,180

TC 22,130 21,400 20,600 20,080 19,130 18,100

72 (22.2) SHC 7,190 7,010 6,670 6,500 6,160 5,810

71 76 (24.4) SHC 10,100 9,930 9,590 9,410 9,240 8,900

(21.7) 80 (26.7) SHC 13,360 13,010 12,840 12,670 12,330 11,990

84 (28.9) SHC 16,270 16,100 15,760 15,590 15,240 14,900 88 (31.1) SHC 19,190 19,010 18,670 18,500 18,330 17,990

TC 23,020 22,270 21,450 20,980 20,000 18,930

75 76 (24.4) SHC 6,840 6,670 6,330 6,160 5,980 5,640

(23.9) 80 (26.7) SHC 9,930 9,760 9,410 9,240 9,070 8,730

84 (28.9) SHC 12,840 12,670 12,500 12,330 11,990 11,640 88 (31.1) SHC 15,930 15,590 15,410 15,240 14,900 14,730

36

Outdoor Unit : CMH2472 Indoor Unit : KMHS0972 × 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: 23,200 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 23,420 22,600 21,710 21,090 20,040 15,560

72 (22.2) SHC 19,190 18,840 18,330 18,160 17,640 15,560

59 76 (24.4) SHC 22,100 21,760 21,410 21,070 20,040 15,560

(15.0) 80 (26.7) SHC 23,420 22,600 21,710 21,090 20,040 15,560

84 (28.9) SHC 23,420 22,600 21,710 21,090 20,040 15,560 88 (31.1) SHC 23,420 22,600 21,710 21,090 20,040 15,560

TC 24,490 23,650 22,730 22,140 21,050 15,980

72 (22.2) SHC 15,760 15,410 15,070 14,730 14,390 12,330

63 76 (24.4) SHC 18,840 18,330 17,990 17,810 17,300 15,240

(17.2) 80 (26.7) SHC 21,930 21,590 21,070 20,900 20,390 15,980

84 (28.9) SHC 24,490 23,650 22,730 22,140 21,050 15,980 88 (31.1) SHC 24,490 23,650 22,730 22,140 21,050 15,980

TC 25,560 24,700 23,760 # 23,200 22,080 16,380

72 (22.2) SHC 12,330 11,990 11,640 11,470 10,960 8,900

67 76 (24.4) SHC 15,410 15,070 14,730 14,390 14,040 11,990

(19.4) 80 (26.7) SHC 18,500 18,160 17,810 17,470 17,130 15,070

84 (28.9) SHC 21,410 21,070 20,730 20,560 20,040 16,380 88 (31.1) SHC 24,500 24,160 23,640 23,200 22,080 16,380

TC 26,610 25,730 24,770 24,270 22,840 16,730

72 (22.2) SHC 8,730 8,390 8,040 7,870 7,360 5,470

71 76 (24.4) SHC 11,810 11,470 11,130 10,960 10,440 8,390

(21.7) 80 (26.7) SHC 14,900 14,560 14,210 14,040 13,530 11,470

84 (28.9) SHC 17,810 17,470 17,130 16,960 16,440 14,560 88 (31.1) SHC 20,900 20,560 20,210 20,040 19,530 16,730

TC 27,510 26,620 25,640 25,210 23,240 17,000

75 76 (24.4) SHC 8,210 7,870 7,700 7,530 6,840 4,960

(23.9) 80 (26.7) SHC 11,300 11,130 10,790 10,610 9,930 8,210

84 (28.9) SHC 14,390 14,040 13,700 13,530 13,010 11,130 88 (31.1) SHC 17,300 16,960 16,790 16,610 15,930 14,040

37

Outdoor Unit : CMH3172 Indoor Unit : KMHS0972 × 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

38

Outdoor Unit : CMH1972 Indoor Unit : KMHS0972 × 3

Power Supply : 230V Single Phase 60Hz

< Heating Capacity >

5-3. Heating Capacity

TH : Total Heating Capacity (BTU/h)

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 70 °F (21.1 °C) D.B. : Outdoor Ambient Temp. 47 °F (8.3 °C) D.B. / 43 °F (6.1 °C) W.B.

2.

3. Above data represents the value when the operation frequency of a compressor is fixed.

Above data does not take Defrost Operation, Overload Prevention Protection, and/or Cold Air Prevention Protection during heating operation into account. For this reason, the value may vary from the actual heating characteristics.

NOTE

RATING CAPACITY: 24,800 BTU/h AIR FLOW RATE: 847 CFM

OUTDOOR INDOOR

ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C)

W.B. 60 65 70 75 80

(15.6) (18.3) (21.1) (23.9) (26.7)

0 (-17.8) TH 13,820 13,790 13,750 13,710 13,660

3 (-16.1) TH 14,280 14,250 14,220 14,170 14,120

8 (-13.3) TH 15,390 15,360 15,320 15,280 15,220

13 (-10.6) TH 16,540 16,510 16,470 16,420 16,360

18 (-7.8) TH 17,810 17,780 17,740 17,680 17,620

23 (-5.0) TH 19,150 19,110 19,070 19,010 18,930

28 (-2.2) TH 20,540 20,500 20,450 20,380 20,310

33 (0.6) TH 21,980 21,940 21,880 21,810 21,730

38 (3.3) TH 23,400 23,360 23,300 23,220 23,130

43 (6.1) TH 24,920 24,870 # 24,800 24,720 24,620

48 (8.9) TH 26,450 26,400 26,330 26,240 26,130

53 (11.7) TH 28,000 27,940 27,870 27,770 27,660

58 (14.4) TH 29,500 29,440 29,360 29,250 29,130

63 (17.2) TH 31,050 30,980 30,890 30,780 30,660

65 (18.3) TH 31,650 31,580 31,490 31,380 31,250

39

Outdoor Unit : CMH2472 Indoor Unit : KMHS0972 × 3

Power Supply : 230V Single Phase 60Hz

< Heating Capacity >

TH : Total Heating Capacity (BTU/h)

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 70 °F (21.1 °C) D.B. : Outdoor Ambient Temp. 47 °F (8.3 °C) D.B. / 43 °F (6.1 °C) W.B.

2.

3. Above data represents the value when the operation frequency of a compressor is fixed.

Above data does not take Defrost Operation, Overload Prevention Protection, and/or Cold Air Prevention Protection during heating operation into account. For this reason, the value may vary from the actual heating characteristics.

NOTE

RATING CAPACITY: 29,200 BTU/h AIR FLOW RATE: 847 CFM

OUTDOOR INDOOR

ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C)

W.B. 60 65 70 75 80

(15.6) (18.3) (21.1) (23.9) (26.7)

0 (-17.8) TH 16,550 16,540 16,510 16,470 16,420

3 (-16.1) TH 17,100 17,080 17,050 17,010 16,960

8 (-13.3) TH 18,390 18,370 18,340 18,300 18,250

13 (-10.6) TH 19,730 19,710 19,680 19,640 19,580

18 (-7.8) TH 21,200 21,180 21,150 21,100 21,040

23 (-5.0) TH 22,740 22,720 22,680 22,630 22,570

28 (-2.2) TH 24,330 24,310 24,270 24,220 24,150

33 (0.6) TH 25,970 25,950 25,900 25,850 25,770

38 (3.3) TH 27,580 27,560 27,510 27,450 27,100

43 (6.1) TH 29,280 29,250 # 29,200 29,130 27,660

48 (8.9) TH 30,990 30,950 30,900 30,830 28,150

53 (11.7) TH 32,690 32,650 32,600 31,800 28,540

58 (14.4) TH 34,320 34,280 34,220 32,140 28,820

63 (17.2) TH 35,970 35,930 35,860 32,330 28,990

65 (18.3) TH 36,600 36,560 36,110 32,370 29,010

40

Outdoor Unit : CMH3172 Indoor Unit : KMHS0972 × 4

Power Supply : 230V Single Phase 60Hz

< Heating Capacity >

TH : Total Heating Capacity (BTU/h)

1.

Rating conditions (#)

: Indoor Unit Entering Air Temp. 70 °F (21.1 °C) D.B. : Outdoor Ambient Temp. 47 °F (8.3 °C) D.B. / 43 °F (6.1 °C) W.B.

2.

3. Above data represents the value when the operation frequency of a compressor is fixed.

Above data does not take Defrost Operation, Overload Prevention Protection, and/or Cold Air Prevention Protection during heating operation into account. For this reason, the value may vary from the actual heating characteristics.

NOTE

RATING CAPACITY: 32,000 BTU/h AIR FLOW RATE: 1,130 CFM

OUTDOOR INDOOR

ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C)

W.B. 60 65 70 75 80

(15.6) (18.3) (21.1) (23.9) (26.7)

0 (-17.8) TH 18,270 18,260 18,230 18,200 18,150

3 (-16.1) TH 18,860 18,850 18,820 18,790 18,740

8 (-13.3) TH 20,260 20,250 20,230 20,200 20,150

13 (-10.6) TH 21,720 21,710 21,680 21,650 21,600

18 (-7.8) TH 23,310 23,300 23,280 23,240 23,190

23 (-5.0) TH 24,970 24,960 24,940 24,910 24,850

28 (-2.2) TH 26,690 26,690 26,660 26,630 26,570

33 (0.6) TH 28,460 28,450 28,430 28,400 28,340

38 (3.3) TH 30,190 30,190 30,170 30,140 30,080

43 (6.1) TH 32,020 32,020 # 32,000 31,960 31,900

48 (8.9) TH 33,850 33,850 33,840 33,800 33,740

53 (11.7) TH 35,680 35,680 35,670 35,630 35,570

58 (14.4) TH 37,420 37,430 37,420 37,380 37,320

63 (17.2) TH 39,190 39,200 39,190 39,160 39,100

65 (18.3) TH 39,870 39,880 39,880 39,850 39,790

41

8FA2-5257-59100-1

WHT

REACTANCE

WHT

YEL

BLK

1

11

22

11

22

1

2 2

2

3

4

COIL/OUTDOOR

YEL

1

2

3

4

A-TH

COIL

THERMISTOR

COMPRESSOR

THERMISTOR

AW THERMISTOR

AN THERMISTOR

(7P)CONNECTOR

(3P)CONNECTOR

FERRITE

CORE

WHT

YEL

1

2

3

4

B-TH

DEF1 DEF0

BW THERMISTOR

BN THERMISTOR

CW THERMISTOR

HIGH PRESSURE

SWITCH

CN THERMISTOR

(2P)CONNECTOR

BLK

OUTDOOR

THERMISTOR

W W

2

1

BLK

RED

DEF

DEFROST

VALVE COIL

COMPRESSOR

MOTOR

OVERLOAD

RELAY(OLR)

CONTROLLER

EXPANSION BOARD

FAN MOTOR

4WAY

VALVE COIL

CRANKCASE

HEATER

(1P)CONNECTOR

(1P)

CONNECTOR

WHT

RV1 RV0 HEATER1

SICOM2

SI-C

KS10

CN01

HEATER0

(2P)CONNECTOR

WHT

W W W

W

2

1

1 1

BLK

RED

RV

L2 L1

MV0

MAGNETIC COIL

MV0

(2P)CONNECTOR

WHT

W

E1

WW

2

1

WHT

W

WHT

ACIN1

W

ACIN2

SI-A

SI-B

25A

W

U

COMP

WVWWW

GRN/YEL

E

W

GRN/YEL

6

1

4

5

BLK

GND

BLK

RELAY

TERMINAL PLATE

W

1

2

123456789

L2

POWER

SUPPLY

L1

FERRITE

CORE

WHT

BLK

RED

BLU

BLK

WHT

BLK

WHT

GND

A INDDOR

UNIT

B INDDOR

UNIT

TO INDDOR UNIT

C INDDOR

UNIT

5

4

3

2

1

5

4

3

2

1

GRY BLK YEL RED

ORG

MV1

MAGNETIC COIL

MV1

5

4

3

2

1

5

4

3

2

1

GRY BLK YEL RED

ORG

BLK

1

WHT

2

RED

3

BLU

4

KS22

CN02

BLK

1

WHT

2

RED

3

BLU

4

BLK

5

WHT

6

KS23FM

WHT

RED

BLK

S/U C/W

R/V

CN03

BLK

1

WHT

2

RED

3

1

2

3

BLU

4

BLK

5

WHT

6

RED

7

RED

1

2

3

BLU

4

BRN

5

WHT

6

ORG

RED

BLU

BRN

WHT

ORG

7

1 2 3 4 5 6 7

7

BLU

YEL

8

WHT

MV2C-TH

MAGNETIC COIL

MV2

5

4

3

2

1

5

4

3

2

1

4

3

2

1

FM

CM

GRY BLK YEL

RED

ORG

BRN

BLU WHT RED (PNK)

BLU

WHT

RED (PNK)

BLK

WHT WHT

WHT

WHT WHT

WARNING

To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts.

6. ELECTRICAL DATA

6-1. Electric Wiring Diagrams

Outdoor Unit CMH1972

42

8FA2-5257-59300-1

WHT

REACTANCE

WHT

YEL

BLK

1

11

22

11

22

1

2 2

2

3

4

COIL/OUTDOOR

YEL

1

2

3

4

A-TH

COIL

THERMISTOR

COMPRESSOR

THERMISTOR

AW THERMISTOR

AN THERMISTOR

(7P)CONNECTOR

(3P)CONNECTOR

FERRITE

CORE

WHT

YEL

1

2

3

4

B-TH

DEF1 DEF0

BW THERMISTOR

BN THERMISTOR

CW THERMISTOR

HIGH PRESSURE

SWITCH

CN THERMISTOR

(2P)CONNECTOR

BLK

OUTDOOR

THERMISTOR

W W

2

1

BLK

RED

DEF

DEFROST

VALVE COIL

COMPRESSOR

MOTOR

OVERLOAD

RELAY(OLR)

CONTROLLER

EXPANSION BOARD

FAN MOTOR

4WAY

VALVE COIL

CRANKCASE

HEATER

(1P)CONNECTOR

(1P)

CONNECTOR

WHT

RV1 RV0 HEATER1

SICOM2

SI-C

KS10

CN01

HEATER0

(2P)CONNECTOR

WHT

W W W

W

SI-D

W

2

1

1 1

BLK

RED

RV

L2 L1

MV0

MAGNETIC COIL

MV0

(2P)CONNECTOR

WHT

W

E

WW

2

1

WHT

W

WHT

ACIN1

W

ACIN2

SI-A

SI-B

25A

W

U

COMP

WVWWW

GRN/YEL

6

1

4

5

BLK

GND

BLK

RELAY

TERMINAL PLATE

W

1

2

123456789

101112

L2

POWER

SUPPLY

L1

FERRITE

CORE

WHT

BLK

RED

BLU

BLK

WHT

GND

A INDDOR

UNIT

B INDDOR

UNIT

TO INDDOR UNIT

C INDDOR

UNIT

D INDDOR

UNIT

5

4

3

2

1

5

4

3

2

1

GRY BLK YEL RED

ORG

MV1

MAGNETIC COIL

MV1

5

4

3

2

1

5

4

3

2

1

GRY BLK YEL RED

ORG

BLK

1

WHT

2

RED

3

BLU

4

KS22

CN02

BLK

1

WHT

2

RED

3

BLU

4

BLK

5

WHT

6

KS23FM

WHT

RED

BLK

S/U C/W

R/V

CN03

BLK

1

WHT

2

RED

3

1

2

3

BLU

4

BLK

5

WHT

6

RED

7

RED

1

2

3

BLU

4

BRN

5

WHT

6

ORG

RED

BLU

BRN

WHT

ORG

7

1 2 3 4 5 6 7

7

BLU

YEL

8

WHT

MV2C-TH

MAGNETIC COIL

MV2

5

4

3

2

1

5

4

3

2

1

4

3

2

1

DW THERMISTOR

DN THERMISTOR

YEL

D-TH

4

3

2

1

FM

CM

GRY BLK YEL RED

ORG

MV3

MAGNETIC COIL

MV3

5

4

3

2

1

5

4

3

2

1

GRY BLK YEL RED

ORG

BRN

BLU WHT RED (PNK)

BLU

WHT RED (PNK)

BLK

WHT WHT

WHT

WHT WHT

BLK

GRY

E1

W

GRN/YEL

Outdoor Unit CMH2472

WARNING

To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts.

43

8FA2-5257-89400-1

WHT

REACTANCE

WHT

YEL

BLK

1

11

22

11

22

1

2 2

2

3

4

COIL/OUTDOOR

YEL

1

2

3

4

A-TH

COIL

THERMISTOR

COMPRESSOR

THERMISTOR

AW THERMISTOR

AN THERMISTOR

(7P)CONNECTOR

(3P)CONNECTOR

FERRITE

CORE

WHT

YEL

1

2

3

4

B-TH

DEF1 DEF0

BW THERMISTOR

BN THERMISTOR

CW THERMISTOR

HIGH PRESSURE

SWITCH

CN THERMISTOR

(2P)CONNECTOR

BLK

OUTDOOR

THERMISTOR

W W

2

1

BLK

RED

DEF

DEFROST

VALVE COIL

COMPRESSOR

MOTOR

OVERLOAD

RELAY(OLR)

CONTROLLER

EXPANSION BOARD

FAN MOTOR

4WAY

VALVE COIL

CRANKCASE

HEATER

(1P)CONNECTOR

(1P)

CONNECTOR

WHT

RV1 RV0 HEATER1

SICOM2

SI-C

KS10

CN01

HEATER0

(2P)CONNECTOR

WHT

W W W

W

SI-D

W

2

1

1 1

BLK

RED

RV

L2 L1

MV0

MAGNETIC COIL

MV0

(2P)CONNECTOR

WHT

W

E

WW

2

1

WHT

W

WHT

ACIN1

W

ACIN2

SI-A

SI-B

25A

W

U

COMP

WVWWW

GRN/YEL

FERRITE

CORE

6

1

4

5

BLK

GND

BLK

RELAY

TERMINAL PLATE

W

1

2

123456789

101112

L2

POWER

SUPPLY

L1

WHT

BLK

RED

BLU

BLK

WHT

GND

A INDDOR

UNIT

B INDDOR

UNIT

TO INDDOR UNIT

C INDDOR

UNIT

D INDDOR

UNIT

5

4

3

2

1

5

4

3

2

1

GRY BLK YEL RED

ORG

MV1

MAGNETIC COIL

MV1

5

4

3

2

1

5

4

3

2

1

GRY BLK YEL RED

ORG

BLK

1

WHT

2

RED

3

BLU

4

KS22

CN02

BLK

1

WHT

2

RED

3

BLU

4

BLK

5

WHT

6

KS23FM

WHT

RED

BLK

S/U C/W

R/V

CN03

BLK

1

WHT

2

RED

3

1

2

3

BLU

4

BLK

5

WHT

6

RED

7

RED

1

2

3

BLU

4

BRN

5

WHT

6

ORG

RED

BLU

BRN

WHT

ORG

7

1 2 3 4 5 6 7

7

BLU

YEL

8

WHT

MV2C-TH

MAGNETIC COIL

MV2

5

4

3

2

1

5

4

3

2

1

4

3

2

1

DW THERMISTOR

DN THERMISTOR

YEL

D-TH

4

3

2

1

FM

CM

GRY BLK YEL RED

ORG

MV3

MAGNETIC COIL

MV3

5

4

3

2

1

5

4

3

2

1

GRY BLK YEL RED

ORG

BRN

BLU WHT RED (PNK)

BLU

WHT RED (PNK)

BLK

WHT WHT

WHT

WHT WHT

BLK

GRY

E1

W

GRN/YEL

Outdoor Unit CMH3172

WARNING

To avoid electrical shock hazard, be sure to disconnect power before checking, servicing and/or cleaning any electrical parts.

44

7. FUNCTIONS

7-1. Explanation of Functions

The numerical values such as temperature, frequency, time and current in parentheses are an example

of CMH3172 and the values are different from the other models.

Control/conditions

INITIAL

Breaker is ON. Power is supplied to the indoor and outdoor unit

control circuits, however the unit remains stopped. Positioning of the outdoor unit electric expansion valve is performed.

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 HEAT, 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 HEAT, SENSOR DRY, or COOL item.

This applies in the case of automatic HEAT/COOL operation.

HEAT

Unit operation Explanation

The ON/OFF operation button on the remote controller is pressed.

The unit is forced to stop for 3 minutes after the power is turned ON, or 3 minutes after the compressor stops, in order to protect the compressor.

The frequency is increased at the rate of 1 Hz every 0.5 seconds.

Operation lamp illuminates.

Indoor fan is stopped to prevent cold air from being emitted.

Outdoor unit begins operating after forced-stop is canceled.

This is in order to stabilize the return of oil to the compressor.

When the frequency reaches Hz,frequency increases are stopped for a period of seconds.

(Refor to Table 2 "Freguency control".)

If the indoor and outdoor temperatures are high, the current peak cut-off activates, stopping any increases in frequency.

The frequency then increases.

The thermostat turns OFF.

The outdoor unit stops. (It does not stop if the thermostat for another indoor unit is ON.)

Approximately 30 seconds after the thermostat turns OFF, the indoor fan is stopped.

The indoor fan is stopped.

The indoor and outdoor temperatures are high.

The outdoor unit starts automatically after 3 minutes.

During these 3 minutes, a low-pressure pressure balance is achieved, allowing the compressor to start more easily.

In order to protect the compressor, the outdoor unit will not operate for 3 minutes after the thermostat turns OFF, even if the room temperature drops below the desired temperature.

The room temperature has reached the desired temperature.

Operating frequency is stabilized in order to maintain a comfortable environment.

The indoor temperature and the remote controller temperature setting are approximately equal.

Depending on the relationship between the remote controller temperature setting and the room temperature, the compressor may stop temporarily (in other words, the thermostat may turn OFF).

When the indoor coil temperature rises,

the compressor starts,

the outdoor fan starts,

and the indoor fan changes from "LL" to the set fan speed.

The amount of heat pump exceeds the amount of heat radiation from the room. Therefore, there is no need to further increase the compressor capacity, and the frequency is stabilized or lowered.

The frequency is not increased, even if there is a difference between the room temperature and the desired temperature. In some cases, the frequency may be decreased.

NOTE

45

Control/conditions

HEAT

When defrost operation begins, frost has formed on the outdoor unit (when the ambient air temperature is low).

Defrost operation begins based on outdoor heat exchanger temperature and outdoor air temperature conditions.

Non-stop defrost (Refer to Fig. 1)

1. After HEAT operation begins, the temperature of the outdoor heat exchanger is at or below the L1 line for 35 minutes. (If outdoor air temperature is less than 26.6 °F, the time is 48 minutes)

2. After HEAT operation begins, the temperature of the outdoor heat exchanger is at or below the L2 line for 120 minutes.

The 4-way valve remains ON during defrost.

Non-stop defrost

Unit operation Explanation

The outdoor fan stops and the solenoid valve turns ON, allowing the refrigerant to bypass the indoor unit.

Indoor fan : Stopped

Outdoor fan : Stopped

Compressor : 80 Hz

Solenoid valve (for hot gas bypass): ON

4-way valve : Remains ON

Operation lamp : Red and orange ON

alternately

Defrost release Indoor fan turns ON.

After 10 seconds, the solenoid valve (for hot gas bypass) turns OFF.

When the cold air feel has disappeared, the indoor fan starts and gradually increases speed until it reaches the set speed.

STOP

[Clean defrost]

Defrost is performed when the outdoor unit is stopped, and the temperature of the outdoor unit coil is at or below the L1 line.

(Refer to Fig. 1.)

All indicator lamps turn OFF. The indoor and outdoor units stop.

The operating frequency during defrost is 80 Hz. (Frequency is lowered if the current peak cut-off function is activated.)

The maximum length of a single defrost operation is 12 minutes.

For the outdoor heat exchanger temperature conditions for ending defrost, refer to Table 1.

Operation is restarted within 4 hours (only when AUTO mode is selected with the remote controller).

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 (HEAT) are stored.

Starts operating in the same operating mode (HEAT) and with the same temperature settings as before operation was stopped.

Operation starts after 4 hours or more have passed.

New operation begins based on the temperature conditions at the time the ON/OFF button is pressed.

The thermostat turns ON. The unit operated before, and the temperature of

the indoor heat exchanger is relatively warm. Therefore,the fan speed may start at the set fan speed at the same time that the thermostat turns ON.

The indoor unit is stopped.

46

Control/conditions

COOL

The ON/OFF operation button on the remote controller is pressed.

The room temperature has reached the desired temperature.

The outdoor unit does not operate for 3 minutes even after the breaker is turned ON.

This is in order to stabilize the return of oil to the compressor.

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 2.)

If the indoor and outdoor temperatures are high, the current peak cut-off activates, stopping any increases in frequency.

The frequency then increases.

Operating frequency is stabilized in order to maintain a comfortable environment.

The indoor temperature and the desired temperature are approximately equal.

The thermostat turns ON again.

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.

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.

Operation is restarted within 4 hours (only when AUTO mode is selected with the remote controller).

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.

Starts operating in the same operating mode (COOL) and with the same temperature settings as before operation was stopped.

Operation starts after 4 hours or more have passed.

New operating mode is determined based on the temperature conditions at the time the ON/OFF operation button is pressed.

Stop All indicator lamps turn OFF. The indoor and

outdoor units stop.

Freeze prevention In order to protect against freezing, the

compressor stops temporarily, until the temperature of the indoor heat exchanger has risen.

The thermostat turns OFF.

The outdoor unit stops. (It does not stop if the thermostart for another indoor unit is ON.)

Unit operation Explanation

The operation lamp illuminates.

The indoor fan operates at the set fan speed.

The outdoor unit stops.

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.

The frequency is increased at the rate of 0.5 Hz every 1 seconds.

Table 1

Outdoor heat

exchanger temperature (°F)

Fig. 1

Outdoor air temperature (°F)

(- 4) 0

(21.2) (19.4)

(-11.2) (-13.0)

L2 L1

Temperature of releasing

*1 The temperature for releasing of defrosting is (68 °F) or higher when the

outdoor air temperature is less than 32 °F.

Defrost operation time

Heat exchanger temperature for releasing defrosting

Less than 2 minutes 2 minutes or more

No releasing 57.2 °F or higher (*1)

47

Control/conditions

SENSOR DRY

(1/f fluctuation fan)

The ON/OFF operation button on the remote controller is pressed.

The outdoor unit does not operate for 3 minutes even after the breaker is turned ON.

This is in order to stabilize the return of oil to the compressor.

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 2.)

DRY B operation

If the indoor and outdoor temperatures are high, the current peak cut-off activates, stopping any increases in frequency.

The frequency then increases.

Unit operation Explanation

The operation lamp illuminates.

The indoor fan operates at the set fan speed.

The outdoor unit stops.

The room temperature reaches the desired temperature, and there is no need for further cooling.

Operating frequency is stabilized in order to maintain a comfortable environment.

The room temperature is 59 °F or higher, and is slightly too cold.

The compressor operates on a 3-minutes ON, 6-minutes OFF cycle, to prevent the room temperature from dropping too much.

DRY operation starts

DRY A operation

The room temperature is below 59 °F.

When monitoring operation begins, the compressor stops, and the indoor fan operates at "LL" (very low) speed.

Monitoring operation begins.

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. 2.)

The indoor fan changes between "Low" and "LL" (very low) over a 6-minute cycle. This is 1/f fluctuation fan operation.

After appoximately 3 minutes, the compressor turns OFF, the outdoor fan turns OFF, and the indoor fan turns OFF.

After approximately 6 minutes, the conditions return to (1).

(1)

(2)

(3)

The frequency is increased at the rate of 0.5 Hz every 1 seconds.

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.

Frequency control

(Hz)

(25) Hz

(35) Hz

(45) Hz

(55) Hz

Outdoor air temperature is below 32 °F.

(120) seconds

(60) seconds

(180) seconds

Table 2

(senconds)

Outdoor air temperature is 32 °F or higher.

(60) seconds

(30) seconds

(90) seconds

48

1/f fluctuation fan

250

200

6-minute cycle

Fig. 2

150

100

(Step)

50

0

49

7-2. Protective Functions

7-2-1. Defrost Detection and Release

(2) Clean defrost

If all indoor units are stopped during HEAT operation, and frost is detected at the L1 line, and the conditions for defrost are met, then defrost operation occurs, and the unit stops after defrost is completed.

(1) Non-stop defrosting

Heating operation

NOTE

Defrost does not occur during HIGH POWER operation.

If other stopped indoor units are started during defrost operation, they begin operating in defrost mode.

Frost detection

Non-stop defrosting

Releasing of defrosting

Defrosting sequence 4-way valve ON

Defrost detection occurs in either of the following cases:

The temperature of the heat exchanger remains at or below the L1 line for 35 minutes after the start of HEAT operation.

Compressor Outdoor fan Solenoid valve

(for hot gas bypass)

Temperature of the outdoor heat exchanger is at or above the temperature shown in the table below.

Temperature of releasing

*1 The temperature for releasing of defrosting is (68 °F) or higher when the

outdoor air temperature is less than 32 °F.

Defrost operation time

Defrost operation has continued for 12 minutes (max. length).

Indoor fan

(80 Hz) operation (4-way valve ON) OFF ON

OFF

The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation.

Outdoor heat

exchanger temperature (°F)

Outdoor air temperature (°F)

(- 4) 0

( 21.2) ( 19.4)

(-11.2) (-13.0)

L2 L1

Less than 2 minutes 2 minutes or more

No releasing 57.2 °F or higher (*1)

The numerical values such as temperature, frequency, time and current in parentheses are an example

of CMH3172 and the values are different from the other models.

NOTE

Heat exchanger temperature for releasing defrosting

50

7-2-2. Current Control

The operating current may rise as a result of causes including increasing heating or 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.

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)

HEAT

Power breakers and fuses will not be tripped.

Operation can continue during this period with somewhat reduced heating or cooling capacity.

Operation at normal capacity is restored when the cause of the current rise is eliminated.

Description of function

•

Example of operation for heating

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

Frequency

Frequency Current

Stops operation

Approx.3 minutes

Power Point C

Point B Point A

(20A) (17A)

(16.6A)

Target

frequency

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.)

•

As a result:

(1) Automatic frequency control

The operating frequency upper limits shown in the figure below are established for frequency reduction and increase-prohibit.

(2) Current control

NOTE

During defrost operation, the COOL current setting value is used.

COOL

(20.0) (20.0)

(17.0) (17.0)

(16.6)

Point C (peak cut trip)

Point B (Hz reduction)

Point A (Hz increase prohibit) (16.6)

51

7-2-5. Control at HEAT Start-up

If HEAT operation is started when the outdoor air temperature is 59 °F or below, the unit operates at the HEAT start-up frequency (70 Hz or above).

Reset conditions

The compressor frequency exceeds the start-up frequency of (70 Hz).

The compressor thermostat is OFF.

Frequency reduction for indoor high-load control has occurred.

The outdoor air temperature is above 59 °F.

The main-unit switch on one or more indoor units is set to TEST run.

(1)

(2)

(3)

(4)

(5)

(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.

7-2-3. Low Start Current

To protect the compressor coil from overheating, the operating frequency is controlled based on the compressor discharge temperature.

7-2-4. Compressor Temperature Control

52

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.

53

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)

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.

Heat Exchanger Rear side P.C.Board of Electrical Component Box.

Error Monitor Lamps

Front side

Fig.1 View from top

ERR0 ERR1 ERR2 ERR3

Power Lamp

Error Monitor Lamp

Error Contents

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)

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)

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

Outdoor temp sensor

: ON : OFF

54

8-3-1. Checking the outdoor unit

8-3. Checking the Outdoor System

8-3-2. Checking the defrost operation

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, fan motor, 4-way valve, and solenoid

valve (for the hot gas bypass) must turn ON.

(They turn ON about (70) seconds later after the power

is turned ON.)

•

No.

1

2

Check items (unit operation)

Work procedure

Connect a dummy resistor of 39 k ohm to the outdoor coil temperature sensor connector.

• Non-stop defrost

The maximum length of defrost operation is 12 minutes. Defrost can also be released based on the below conditions for the outdoor heat exchanger sensor.

*1 However, the condition is (68 °F) or higher when the outdoor air temperature is below 32 °F.

Less than 2 minutes Not released 2 minutes or more 57.2 °F or higher (*1)

•

No.

1

Check items (unit operation)

Indoor fan

Outdoor fan

CM

Solenoid valve

(for hot gas

bypass)

30 sec.

10 sec.5 sec.

(80 Hz)

ON

ONOFF OFF

OFFON

Defrost start Release

ON

Setting Setting

LL

Stop

NOTE

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.

Using forced defrost operation to check this function.

55

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

Indoor unit

Indoor unit does not operate.

Self-Diagnostics check

Indoor controller (control unit)

Indoor fan motor

Room temperature sensor

Heat exchanger temperature sensor

Inter-unit cable

Switch circuit board

Outdoor control circuit board

Diode module

HIC

Electrolytic capacitor

Fuse

Compressor

Compressor protective sensor

Outdoor fan motor

4-way valve

Coil thermistor

Electric expansion valve

Branch tubing temperature sensor

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

Operation lamp blinking.

Operation lamp does not illuminate.

Indoor fan dose not turn.

Outdoor unit does not operate.

Outdoor fan dose not turn.

4-way valve does not operate.

The compressor (only) does not

operate.

The compressor stops on occasion.

The compressor speed does not

increase.

The outdoor air temperature is high,

however defrost operation occurs.

Defrost operation does not occur.

The electric expansion valve does

not operate.

Does not cool or cooling

performance is inadequate.

Does not heat or heating

performance is inadequate.

Outdoor unit Others

No. of Inspection Points for Each part

Indoor unitOutdoor unit

56

Problems

Inspection

points

Indoor unit

Indoor unit does not operate.

Breaker

Refrigerant gas pressure

(9)

(10)

Operation lamp blinking.

Operation lamp does not illuminate.

Indoor fan dose not turn.

Outdoor unit does not operate.

Outdoor fan dose not turn.

4-way valve does not operate.

The compressor (only) does not

operate.

The compressor stops on occasion.

The compressor speed does not

increase.

The outdoor air temperature is high,

however defrost operation occurs.

Defrost operation does not occur.

The electric expansion valve does

not operate.

Does not cool or cooling

performance is inadequate.

Does not heat or heating

performance is inadequate.

Outdoor unit Others

No. of Inspection Points for Each part

Others

8-4-2. Inspection Points for Each Part

(1) Outdoor control circuit board

Refer to "8-3-1. Checking the outdoor unit".

(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.

(5) 4-way valve

Short-circuit the T-RUN terminal to the COM terminal of TEST/T-RUN terminals. Perfrom a test run of the unit alone, and check whether the 4-way valve inside the outdoor unit produces a click sound.

(6) Coil thermistor

Check that the sensor is securely contained in the thermostat holder.

Do not remove or insert the outdoor control circuit board connector when power is being supplied to it. (The controller will be damaged.)

NOTE

57

No voltage on circuit board

(7) 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

Voltage varies

0 ohm

No temperature change Temperature changes

Replace the coil.

Open and close the

electric expansion valve

by hand to check it.

Replace the electric

expansion valve.

This part is normal.

Check elsewhere.

Check the illumination

of the red Power Lamp.

Replace the controller.

Check the coil resistance.

Use a multi-meter to measure the voltage (12 V).

Model No. Sequence

CMH1972

CMH2472 CMH3172

MV0 MV1

When the power is turned ON, the needle will move in the following seguence in approximately 10 to 20 seconds for each point.

Check the resistance between the gray lead wire and the other wires. Resistance is OK if it is 46 + / – 4ohm at 68 °F

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 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.

*1

Approx. 46 +/– 4 ohm

NOTE

*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.)

MV2

MV0 MV1 MV2 MV3

58

(8) Branch tubing temperature sensor

Check that the sensor is securely contained in the thermostat holder.

(9) 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.

(10) 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.

59

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.

[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)

* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor

unit controller (3 locations).

(Diagnostic results)

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

(Replace the controller .)

(Reference) DC motor connector pin arrangement

[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.

Important:

(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.

(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

Measurement location

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.

Normal value

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)

60

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.

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.

CAUTION

61

Tubing precautions

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.

A

D

Flare tool for R410A

A

D

Conventional flare tool (R22)

Spacer

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.

Size of flare

Specification A

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)

Flare tool for R410A Conventional flare tool (for R22)

0 to 0.0196"

(0 to 0.5 mm)

0.0472"

(1.2 mm)

62

9-3. Tools Specifically for R410A

For servicing, use the following tools for R410A

Gauge manifold

Charging hose

Gas leak detector

Refrigerant cylinder

Charging cylinder

Refrigerant recovery unit

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

Torque wrench

Cutter, reamer

Welding tool, nitrogen gas cylinder

Tools specifically for R410A

Tool Distinction Tool Name

Tools which can be com-

monly used for R22,

R407C, and R410A

CAUTION

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.

For details on tubing installation procedures, refer to the installation manuals attached to the indoor unit and outdoor unit.

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"

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

63

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

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

(1) Recover refrigerant

OK

(2) Replace compressor

OK

(3) Check for sealing

OK

(4) Evacuation

OK

(5) Recharge

Length of tubing

Evacuation time

Less than 33 ft. (10 m)

More than 10 minutes

More than 33 ft. (10 m)

More than 15 minutes

64

Valve

Single valve

Charge liquid refrigerant with cylinder in up-side-down position.

Single valve (with siphon tube)

Charge with cylinder in normal position.

Liquid

Valve

Liquid

Charging

cylinder

Open

Refrigerant

cylinder

Liquid

NO!

CAUTION

Never charge a large amount of liquid refrigerant at once to the unit. This may cause damage to the compressor.

CAUTION

To prevent the composition of R410A from changing, never bleed the refrigerant gas into the atmosphere while transferring the refrigerant. (Fig. 3)

(5) Recharging

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.

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.

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.

Do not use the refrigerant if the amount in the charging cylinder is less than 20%.

Configuration and characteristics of cylinders

Fig. 1

Fig. 2

Fig. 3

65

Length of tubing

Evacuation time

Less than 33 ft. (10 m)

More than 10 minutes

More than 33 ft. (10 m)

More than 15 minutes

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.

(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

(6) Recharging

Recharge unit in the same manner explained on the previous page "(5) Recharging."

(2) Recover refrigerant

OK

(3) Weld leaking points

OK

(4) Check for sealing

OK

(5) Evacuation

OK

(6) Recharge

(1) Detect leaks

OK

66

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.

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.

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.

67

INSTALLATION INSTRUCTIONS

CMH1972 CMH2472 CMH3172

(II-852-6-4189-993-00-2)

APPENDIX A

A-1

For Outdoor Unit

INSTALLATION INSTRUCTIONS

– Inverter Multi Split System Air Conditioner –

This air conditioner uses the new refrigerant R410A.

NOTE

Contents

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. Outer Dimensions of Outdoor Unit 2-5. Diagram of Outdoor Unit Installation

3. INSTALLATION PROCESS .............................. 13

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................................................... 16

I Air Purging with a Vacuum Pump (for Test Run) I Pump Down

Refrigerant service valve size = 5/16"

Page

COOL/ DRY/HEAT Model

Model Combinations

Combine indoor and outdoor units only as listed below.

Indoor Unit Outdoor Unit

KMHS0772 CMH1972

KMHS0972 CMH2472

KMHS1272 CMH3172

KMHS1872

KMHS2472

Combine indoor and outdoor units only as listed in the combination tables for 3-room or 4-room outdoor unit as shown in its respective manual.

Power Source: 60 Hz, single-phase, 230 / 208 VAC

Be sure to read the yellow instruction sheet attached to the outdoor unit for models using the new refrigerant R410A.

Combination example

Indoor unit B

Indoor unit A

Indoor unit C

5. WIRING INSTRUCTIONS ................................ 19

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 ......................................................... 23

7. CONNECTING A HOME AUTO MATION

DEVICE ............................................................. 24

8. INSTALLATION CHECK SHEET ...................... 24

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 Commercial Solutions In Canada A Division of SANYO North America Corporation SANYO Canada Inc. Cornerstone Business Park, 1-300 Applewood Crescent, Concord 1062 Thorndale Avenue, Ontario, L4K 5C7, Canada Bensenville, IL 60106, U.S.A.

IMPORTANT! 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

WAR NING

CAUTION

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

WAR NING

• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or

death.

• Ground the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

…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 (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

• 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

CAUTION

• Ventilate any enclosed areas when installing or testing the refrigeration system. Escaped refrigerant gas, on contact with fire or heat, can produce dangerously toxic gas.

• Confirm 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

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.

5. Carpenter’s level

6. Sabre saw or key hole saw

7. Hacksaw

8. Core bits

9. Hammer

10. Drill

11. Tube cutter

12. Tube flaring tool

1-1. Tools Required for Installation (not supplied)

1. Standard screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

16. Vacuum pump (For R410A)

17. Manifold valve

1-2. Accessories Supplied with Unit

Table 1

Parts Figure Q’ty Parts Figure Q’ty Parts Figure Q’ty

1

Reducer (1/2" 3/8")

Packed in the outdoor unit.

Hex wrench Cushion rubber 4

Labels for inter-unit cable and tube

ABCD

1

4 each

Reducer (3/8" 1/2")

CMH1972

CMH2472

CMH3172

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 A/C 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" (30 cm to 40 cm) to dampen vibration between units.

Table 2

Model

KMHS0772 1/4" (6.35 mm) 0.0314" (0.8 mm) 3/8" (9.52 mm) 0.0314" (0.8 mm)

KMHS0972 1/4" (6.35 mm) 0.0314" (0.8 mm) 3/8" (9.52 mm) 0.0314" (0.8 mm)

KMHS1272 1/4" (6.35 mm) 0.0314" (0.8 mm) 3/8" (9.52 mm) 0.0314" (0.8 mm)

KMHS1872 1/4" (6.35 mm) 0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)

KMHS2472 1/4" (6.35 mm) 0.0314" (0.8 mm) 5/8" (15.88 mm) 0.0393" (1.0 mm)

Outer Dia. Thickness Outer Dia. Thickness

Narrow Tube Wide Tube

CAUTION

Check local electrical codes and regulations before obtaining wire. Also, check any specified instructions or limitations.

3

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

2. Installation Site Selection

2-1. Indoor Unit

To prevent abnormal heat generation

WARNING

AVOID:

G direct sunlight.

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.

Indoor unit

Drain hose

Outside drainage

Fig. 1

G nearby heat sources that may affect performance of the

unit.

G areas where leakage of flammable gas may be expected.

G placing or allowing any obstructions near the A/C inlet or

outlet.

G installing in rooms that contain instant-on (rapid-start)

fluorescent lamps. (These may prevent the A/C 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.)

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. 2)

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.

2" (5 cm)

min.

Front View

Fig. 2

INDOOR UNIT (1)

Elevation difference (H1)

H4

INDOOR UNIT (4)

Tubing length (L1)

OUTDOOR UNIT

L4

Fig. 3a

CAUTION

For stable operation of the air conditioner, do not install wall-mounted type indoor units less than 5' (1.5 m) from floor level.

6" (15 cm) min.

INDOOR UNIT (2)

L2

L3

INDOOR UNIT (3)

Indoor unit

Minimum height from floor level

5' (1.5 m)

2" (5 cm)

min.

H2

H3

Wall

Floor level

Fig. 3b

4

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

CMH1972 82 150 (L1+L2+L3) 150 (L1+L2+L3) 50 —

CMH2472 82 150 (L1+L2+L3+L4) 200 (L1+L2+L3+L4) 50 0.22

CMH3172 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

2-2. Connecting Indoor Units

(1) Connecting indoor unit for CMH1972

(A)

3/8"(9.52mm)

3/8"(9.52

(B)

3/8"(9.52mm)

3/8"(9.52

Flare 3/8"(9.52

Outdoor unit Indoor unit

C

1/4"(6.35

B

1/4"(6.35

A

mm

)

1/4"(6.35

mm

)

3/8"(9.52

mm

)

Fig. 4a

Outdoor unit Indoor unit

C

1/4"(6.35mm)

B

mm

)

A

mm

)

Union 1/2"(12.70mm)

mm

)

A joint for connecting tubes of different sizes (3/8"(9.52mm) 1/2"(12.70mm)) Supplied Reducer

1/4"(6.35

mm

)

3/8"(9.52mm)

3/8"(9.52

1/2"(12.70

mm

)

(KMHS0772,KMHS0972,KMHS1272)

(KMHS1872)

(2) Connecting indoor unit for CMH2472

(A)

Outdoor unit Indoor unit

D

mm

3/8"(9.52

1/2"(12.70mm)

)

C

mm

)

B

mm

)

A

Union 3/8"(9.52mm)Flare 1/2"(12.70mm)

(1/2"(12.70mm) 3/8"(9.52mm)) Supplied Reducer

1/4"(6.35

mm

)

Fig. 4b

3/8"(9.52

3/8"(9.52mm)

mm

Fig. 4c

)

(KMHS0772,KMHS0972,KMHS1272)

)

(KMHS0772,KMHS0972,KMHS1272)

)

(KMHS0772,KMHS0972,KMHS1272)

6

(B)

3/8"(9.52

3/8"(9.52mm)

3/8"(9.52

1/2"(12.70

mm

(C)

3/8"(9.52mm)

3/8"(9.52

1/2"(12.70mm)

mm

(1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased

Outdoor unit Indoor unit

D

)

C

B

)

A

)

1/4"(6.35

mm

)

3/8"(9.52

1/2"(12.70

mm

)

Fig. 4d

Outdoor unit Indoor unit

D

1/4"(6.35

C

1/4"(6.35

B

)

A

Union 5/8"(15.88mm)Flare 1/2"(12.70mm)

1/4"(6.35

1/4"(6.35mm)

mm

)

3/8"(9.52mm)

3/8"(9.52

5/8"(15.88mm)

mm

)

(KMHS0772,KMHS0972,KMHS1272)

(KMHS1872)

(KMHS0772,KMHS0972,KMHS1272)

(KMHS2472)

(D)

3/8"(9.52

1/2"(12.70mm)

mm

(1/2"(12.70 Locally purchased

Fig. 4e

Outdoor unit Indoor unit

D

)

C

)

B

)

A

Union 5/8"(15.88mm)Flare 1/2"(12.70mm)

mm

) 5/8"(15.88mm))

1/4"(6.35

mm

1/4"(6.35

mm

)

3/8"(9.52mm)

mm

3/8"(9.52

1/2"(12.70

mm

)

(3/8"(9.52 Locally purchased

)

mm

)

5/8"(15.88mm)

mm

Union 1/2"(12.70mm)Flare 3/8"(9.52mm)

) 1/2"(12.70mm))

Fig. 4f

(KMHS0772,KMHS0972,KMHS1272)

(KMHS1872)

(KMHS2472)

7

(3) Connecting indoor unit for CMH3172

(A)

3/8"(9.52

1/2"(12.70mm)

1/2"(12.70

(B)

3/8"(9.52mm)

1/2"(12.70mm)

1/2"(12.70

Outdoor unit Indoor unit

D

mm

)

C

)

B

A

)

(1/2"(12.70mm) 3/8"(9.52mm)) Supplied Reducer

1/4"(6.35

Union 3/8"(9.52mm)Flare 1/2"(12.70mm)

mm

)

mm

)

mm

)

1/4"(6.35

3/8"(9.52

mm

)

mm

)

mm

)

mm

)

Fig. 4g

Outdoor unit Indoor unit

D

1/4"(6.35

C

1/4"(6.35

B

1/4"(6.35mm)

A

mm

)

Union 3/8"(9.52mm)Flare 1/2"(12.70mm)

(1/2"(12.70mm 3/8"(9.52mm)) Supplied Reducer

mm

1/4"(6.35

)

3/8"(9.52

1/2"(12.70

mm

)

mm

)

(KMHS0772,KMHS0972,KMHS1272)

(KMHS1872)

(C)

Outdoor unit Indoor unit

D

mm

)

C

)

B

)

A

)

3/8"(9.52

1/2"(12.70

1/4"(6.35mm)

1/4"(6.35

1/4"(6.35mm)

1/4"(6.35

mm

)

Fig. 4h

3/8"(9.52

1/2"(12.70mm)

1/2"(12.70

mm

Fig. 4i

8

)

(KMHS0772,KMHS0972,KMHS1272)

)

(KMHS0772,KMHS0972,KMHS1272)

(KMHS1872)

)

(KMHS1872)

(D)

3/8"(9.52

3/8"(9.52mm)

1/2"(12.70mm)

1/2"(12.70

(E)

3/8"(9.52

1/2"(12.70mm)

1/2"(12.70

Outdoor unit Indoor unit

D

mm

)

C

B

A

mm

)

Union 5/8"(15.88mm)Flare 1/2"(12.70mm)

(1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased

1/4"(6.35

mm

1/4"(6.35mm)

mm

)

3/8"(9.52mm)

)

3/8"(9.52

)

3/8"(9.52

(1/2"(12.70mm) 3/8"(9.52mm)) Supplied Reducer

mm

5/8"(15.88

)

mm

Fig. 4j

Outdoor unit Indoor unit

D

mm

)

C

)

B

A

)

1/4"(6.35

1/4"(6.35mm)

(1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased

mm

Union 5/8"(15.88mm)Flare 1/2"(12.70mm)

)

1/4"(6.35

3/8"(9.52

1/2"(12.70mm)

5/8"(15.88

mm

)

mm

)

mm

)

(KMHS0772,KMHS0972,KMHS1272)

)

(KMHS2472)

Union 3/8"(9.52mm)Flare 1/2"(12.70mm)

(KMHS0772,KMHS0972,KMHS1272)

(KMHS1872)

(KMHS2472)

Fig. 4k

9

2-3. Outdoor Unit

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 allow enough room around the unit for air intake/

exhaust and possible maintenance. (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)

CAUTION

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).

NO

Hot air

Outdoor unit

Air intake Min. 6" (15 cm)

Min.

4" (10 cm)

Air discharge

Fig. 5b

Min. 1’8" (50 cm)

Fig. 5a

Valve side Min. 10" (25 cm)

Drain holes

Fig. 5c

Exhaust fan

Heat source

Obstacle above

Ground

Min.

7' (2 m)

Air discharge

Min.

7' (2 m)

Obstacle

Min. 6" (15 cm)

Air intake

Concrete or equal

About 16" (40 cm)

Anchor bolts (4 pcs.)

Min. 6" (15 cm)

About 6" (15 cm)

Fig. 5d

Cushion rubber

Fig. 5e

10

2-4. Outer Dimensions of Outdoor Unit

(1) CMH1972

23-15/16

(2) CMH2472

23-15/16

5-11/32

15/32

A

5-11/32

15/32

A

35-7/16 (900)

13-19/32

12-19/32

14-17/32

2-29/32

23/32

1-13/16

2-1/16

29-1/8 (740)

Service valve on narrow tube side (Outer diameter 1/4"(

Service valve on wide tube side (Outer diameter 3/8"(

2-3/4

2-27/32

4-1/2

2-1/32

5-29/32

2-15/16

4-7/16

6.35

9.52

))

Fig. 6a

A

35-7/16 (900)

12-19/32

13-19/32

14-17/32

2-29/32

29-1/8 (740)

Service valve on narrow tube side (Outer diameter 1/4"(

Service valve on wide tube side (Outer diameter 3/8"(

2-3/4

6.35

9.52

))

(3) CMH3172

23-15/16

5-11/32

15/32

A

2-15/16

4-7/16

Service valve on wide tube side (Outer diameter 1/2"(

12.70

))

23/32

1-13/16

2-1/16

2-13/32

2-27/32

2-1/32

5-29/32

4-1/2

Fig. 6b

A

35-7/16 (900)

12-19/32

13-19/32

14-17/32

Fig. 6c

2-29/32

23/32

1-13/16

2-1/16

2-13/32

35-1/32 (890)

Service valve on narrow tube side (Outer diameter 1/4"(

Service valve on wide tube side

(Outer diameter 3/8"(

2-3/4

2-27/32

2-15/16

5-29/32

2-1/32

4-1/2

4-7/16

Service valve on wide tube side (Outer diameter 1/2"(

6.35

9.52

12.70

))

unit: inch (mm)

11

2-5. Diagram of Outdoor Unit Installation

Never install only a single indoor unit.

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.)

Indoor unit D

Over 4"(10cm)

Ensure 6"(15cm) of space if a drain hose is to be used.

Over 1'8"(50cm)

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

D C B A

Indoor unit C

Indoor unit B

Indoor unit A

Service space

Over 10"(25cm)

Access panel C

Base (not provided) (concrete or similar material)

Fasten with anchor bolts (not provided) (3/8" or M10, 4 locations)

Fig. 7

12

Ground wire (not provided)

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 contact 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

13

NOTE

Flare nut

Union

p

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 “RIGID” 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

rotrusion 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 rotations 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)

Apply refrigerant lubricant here and here

Fig. 12

Fig. 13

14

Fig. 14

NOTE

IMPORTANT

Clamp

Insulated tubes

CAUTION

Be sure to match refrigerant tubing and electric wiring between indoor and outdoor units. For more details, refer to “Tubing Check Control” in the Technical & Service Manual.

3-6. Insulation of Refrigerant Tubing

Indoor unit

Torque wrench

Spanner

Outdoor unit

Fig. 15

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. 17)

3-7. Taping the Tubes

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)

Min. 5/16" (8 mm)

Insulation

Fig. 16

Insulation

Thickness: min. 5/16" (8 mm)

Fig. 17

(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.

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)

Fig. 18

Apply putty here

Tubing

Fig. 19

15

NOTE

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

I

Air Purging with a Vacuum Pump (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

Service valve on wide tube side

With push-pin

D C

B A

Hex wrench

Low-pressure valve

Leave the valve open.

Charging hose (special for R410A)

Fig. 20

Manifold gauge (special for R410A)

Open

High-pressure valve

Vacuum pump adapter

HiLo

(for preventing reverse flow) (special for R410A)

Vacuum pump

CAUTION

In order to prevent charging errors with A/C 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.

Perform the air purge for tubes A, B, C, and D. Use the same 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).

CAUTION

Before using the vacuum pump adapter, read the vacuum pump adapter manual, and use the adapter correctly.

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 .)

External diameter of service port R410A: 5/16"

Fig. 21

Cap tightening torque: 170 – 215 lbs·in (200 – 250 kgf·cm) (Tighten by hand, then use a wrench to turn.)

CAUTION

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.

16

(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 the above table 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 nar-

row tube service valve counter-clockwise by 90 degrees (1/4 turn) for 10 seconds, and then turn the stem clockwise to close it again.

CAUTION

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 the hose.

(10) Leak test all joints at the tubing (both indoor and

outdoors) with liquid soap. Bubbles indicate a leak. Be sure to wipe off the soap with a clean cloth.

CAUTION

If a CFC gas detector is used, use a special detector for HFC refrigerant (such as R410 and R134a).

17

(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 23.)

(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 A/C, 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 0.15 – 0.2 MPa (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.

(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.)

Cap

Narrow tube side

Charging port

Wide tube side

Close

D

Close

C

Close

B

Close

A

Fig. 22

D

C

B

A

Manifold gauge

Fig. 23

After disconnecting the inter-unit tubes, attach the flare nuts with flare bonnets.

If pump-down is not possible

If the A/C cannot be operated because of a malfunction or other cause, use a refrigerant recovery device to recover the refrigerant.

Cap

Fig. 24

18

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

AWG

Model

CMH1972 85 (Max.) 82 (Max.) 20 A

CMH2472 85 (Max.) 82 (Max.) 20 A

CMH3172 85 (Max.) 100 (Max.) 20 A

Max. Power Line Length (ft.)

(A)

(#12) (#14)

Max. Control Line Length (ft.)

(B) (C)

# ... AWG (American Wire Gauge)

Fuse

or

Circuit Capasity

19

WARNING

G Be sure to comply with local codes on running the

wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc.).

G Each wire must be firmly connected. G No wire should be allowed to touch refrigerant

tubing, the compressor, or any moving part.

G Be sure to connect power wires correctly match-

ing up numbers on terminals of the outdoor unit and respective indoor units A – D.

CAUTION

G Be sure to connect the power supply line to the

outdoor unit as shown in the wiring diagram. The indoor unit draws its power from the outdoor unit.

G Do not run wiring for antenna, signal, or power

lines of television, radio, stereo, telephone, security system, or intercom any closer than 3'4" (1 m) from the power cable and wires between the indoor and outdoor units. Electrical noise may affect the operation.

G To avoid the risk of electric shock, each air conditioner

unit must be grounded.

G For the installation of a grounding device, please

observe local electrical codes.

G Grounding is necessary, especially for units using

inverter circuits, in order to release charged electricity and electrical noise caused by high tension. Otherwise, electrical shock may occur.

G Place a dedicated ground more than 7' (2 m) away from

other grounds and do not have it shared with other electric appliances.

NOTE

*

Disconnect switch may be required by national or local codes.

CAUTION

Always comply with national and local code requirements.

5-3. Wiring System Diagram

3 indoor units with CMH1972

Disconnect

*

switch Field supply

(A)

INDOOR UNIT

*

(B)

INDOOR UNIT

*

(C)

INDOOR UNIT

1

2

3

Terminal

Disconnect switch

1

2

3

TerminalTerminal

Disconnect switch

1

2

3

Field supply

230/208V

(C)

Grounding line

230/208V

(C)

Grounding line

230/208V

(C)

Grounding

(B)

230/208V

(B)

230/208V

Fig. 25a

OUTDOOR UNIT

Terminal(9P

(B)

line

(B)

Terminal

1

2

3

4

5

6

7

8

9

(2P)

4 indoor units with CMH2472, CMH3172

Disconnect

*

switch

Field supply

1

)

(A)

UNIT A

(B)

UNIT B

UNIT C

Power supply

Single-phase 230/208VAC 60HZ

L1

L2

1

2

(A)

Grounding line

(C)

(D)

2

3

Terminal

INDOOR UNIT

1

2

3

Terminal

INDOOR UNIT

1

2

3

Terminal

INDOOR UNIT

Disconnect switch

*

Field supply

1

2

3

Terminal

INDOOR UNIT

(C)

Grounding line

(Inter-unit) power line

230/208V

Grounding line

230/208V

Grounding line

Disconnect

*

switch Field supply

230/208V

Disconnect switch

*

Field supply

(C)

230/208V

(C)

230/208V

OUTDOOR UNIT

Terminal(12P

(B)

1

2

3

4

5

6

7

8

9

10

11

12

) 2P

(

Terminal

)

UNIT A

UNIT B

UNIT C

Power supply

Single-phase 230/208VAC 60HZ

UNIT D

L1

L2

1

2

(A)

Grounding line

Fig. 25b

20

Screw and special washer

Ring connector

Wire

5-4. How to Connect Wiring to the Terminal

WARNING

Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, be sure all wiring is tightly connected.

When connecting each power wire to the corresponding terminal, follow the instructions “How to connect wiring to the terminal” and fasten the wire securely tight with the fixing screw of the terminal plate.

How to connect wiring to the terminal

a) For Indoor Unit

(1) Cut the wire end with a cutting pliers, then strip the

insulation to expose the wire about 9/32" (7 mm). See the label (Fig. 26) near the terminal plate.

(2) Using a screwdriver, loosen the terminal screw on

the terminal plate.

(3) Insert the wire and tighten the terminal screw com-

pletely using a screwdriver.

b) For Outdoor Unit

I For solid core wiring (or F-cable)

9/32"

STRIP SIZE

(7 mm)

Fig. 26

Solid wire

Strip 15/16" (25 mm)

Insulation

Fig. 27

Stranded wire

(ACTUAL

SIZE)

Loop

(1) Cut the wire end with a cutting pliers, then strip the

insulation to expose the solid wire about 15/16" (25 mm). (Fig. 27)

(2) Using a screwdriver, remove the terminal screw(s)

on the terminal plate.

(3) Using the pliers, bend the solid wire to form a loop

suitable for the terminal screw.

(4) Shape the loop wire properly, place it on the termi-

nal plate and fix it securely with the removed terminal screw using a screwdriver.

I For stranded wiring

(1) Cut the wire end with a cutting pliers, then strip the

insulation to expose the stranded wiring about 3/8" (10 mm) and tightly twist the wire ends. (Figs. 28 and 29)

(2) Using a screwdriver, remove the terminal screw(s)

on the terminal plate.

(3) Using a ring connector fastener or pliers, securely

clamp each stripped wire end with a ring connector. (Fig. 28)

Wire

Special washer

Ring connector

Strip 3/8" (10 mm)

Fig. 28

Twist wire ends

Fig. 29

Screw

Ring connector

Terminal plate

(4) Place the ring connector wire, and replace and

tighten the removed terminal screw using a screwdriver. (Fig. 30)

Fig. 30

21

5-5. Wiring Instructions for the Outdoor Unit

CAUTION

G Be sure to correctly align inter-unit cables A, B, C and D.

Outdoor unit A

Terminal board

1 2

Indoor unit A

A is the indoor unit with refrigerant tubing that is connected to service valve A (top) of the outdoor unit.

Indoor unit B

B is the indoor unit with refrigerant tubing that is connected to service valve B (top) of the outdoor unit.

Indoor unit C

C is the indoor unit with refrigerant tubing that is connected to service valve C (top) of the outdoor unit.

Indoor unit D

D is the indoor unit with refrigerant tubing that is connected to service valve D (top) of the outdoor unit.

3

2

1

3

2

1

3

2

1

3

2

1

Terminal board

Inter-unit cables #14 (not provided)

Label A

A

Terminal board

Inter-unit cables

Label B

#14 (not provided)

B

Terminal board

Inter-unit cables

Label C

#14 (not provided)

C

Terminal board

Inter-unit cables

Label D

#14 (not provided)

D

1 2 3 4 5 6 7 8 9 10 11 12

Power supply (conduit)

Powe r: Single-phase, 230/208VAC 60HZ

Power switch (not provided)

Ground

Power cable (not provided) (#12: Less than 85 ft.)

Be sure to perform grounding.

Attach a ground wire to either the outdoor unit or indoor unit. If there is a grounding terminal inside the room, use the grounding screw inside the indoor unit.

Be sure to apply the provided labels to both ends of the inter-unit cables to prevent miswiring. The units will not function if the wiring connections are incorrect.

G Use a dedicated A/C circuit for power. G To make connections to the outdoor unit, remove the

inspection panel and tubing panel.

G Do not bring the inter-unit cables or power cable into

contact with tubing or service valves.

G Use outdoor unit cable fasteners and fasten the inter-

unit cables at the location where the cables are doublesheathed.

G Arrange the wiring so that the inter-unit cables are con-

tained in the inspection panel and tubing panel, as shown in Fig. 31.

# ... AWG (American Wire Gauge)

Inter Unit (conduit)

Fig. 31

22

Regulations on wire size differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Make sure that the installation fully complies with all local and national regulations.

(1) Remove access panel “C”. (Fig. 32)

(2) Connect the inter-unit and power supply line accord-

ing to the drawing on the panel side.

(3) Be sure to size each wire allowing approx. 4"

(10 cm) longer than the required length for wiring. Store excess wiring inside the cabinet.

(4) When connections are completed, check that all con-

nections are correct as shown in the wiring system diagram on panel side.

(5) Be sure to ground the unit according to your local

codes.

6. Test Run

Performing a test run

G Refer to the test run procedures in the indoor unit

installation manual.

G Perform the test run separately for each connected

indoor unit. If 2 units are operated simultaneously, it is not possible to correctly check for errors in tubing and wiring.

G If the room temperature is 59°F (15°C) or below, it may

not be possible to check for tubing errors with cooling operation. If this occurs, perform heating operation for each unit individually, and check that warm air is discharged from each unit. If there is cold air mixed in with the warm air, check the tubing connections again.

Terminal block

Conduit plate

Plug

Access panel C

Conduit plate

Lock nut

Inter unit (Conduit)

Cabinet

Access panel “C”

Power supply (Conduit)

Fig. 32

Checking tubing and wiring

Perform the test run and check that operation is normal. If there is an error in tubing or wiring, the refrigerant may flow to indoor unit B when indoor unit A is operated (for example).

CAUTION

G Stop operation immediately if there is an error in tubing

or wiring. Turn the power (breaker) to OFF, and check whether the inter-unit cables are connected incorrectly, or whether the narrow tubes A and B are connected in reverse. Correct the connections.

G If there is an error in tubing, pump-down must be per-

formed. Be sure to perform pump-down. After making corrections, again purge the air from the tubes.

CAUTION

Make sure there is no gap between access panel “C” and the conduit plate.

Fig. 33

23

7. Connecting a Home Automation Device

The HA (white) 4P terminal is located on the indoor unit PCB. If a HA device will be used, connect it to this terminal.

8. Installation Check Sheet

The strength of the installation location is sufficient to support the A/C weight.

The indoor and outdoor units are installed level and vertically.

The power and voltage are as specified.

Inter-unit cables are securely fastened to the terminal board.

Inter-unit cables are securely fixed.

The power cord and inter-unit cables are not connected anywhere along their paths.

The ground wire is securely connected.

An air purge of the refrigerant circuit has been conducted.

A leak test of the tubing connections has been performed.

Thermal insulation has been applied to the tubing connections.

Drain connections are secure and water drains properly.

Putty has been used to close the hole in the wall.

All service valves are fully open.

Remote controller signals are being positively received.

24

UNIT COMBINATION TABLESAPPENDIX B

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

NOTE

<

List of Combination Tables

>

Name of Combination Table

3-Room Outdoor Unit Combination Table

4-Room Outdoor Unit Combination Table

Model No. of Outdoor Unit

CMH1972

CMH2472

CMH3172

Remarks

OI-852-6-4180-821-00-4

OI-852-6-4180-822-00-5

OI-852-6-4180-805-00-4

A-2

Save this Combination Table!

Please be sure to hand over this sheet to the user.

3-Room Outdoor Unit Combination Table

CMH1972

The combinations of the indoor units listed in Table 1 and Table 2 are combinations solely of those units which can be operated concurrently. In addition to the combinations listed in the table, other combinations of indoor units are possible provided that the following conditions are satisfied.

Conditions:

1. At least two or more indoor units must be connected to the multi outdoor unit. It is not acceptable for only one indoor unit to be connected.

2. The total rated cooling capacity of the indoor units to be connected must be no more than 200% of the rated cooling capacity of the outdoor unit.

CAUTION

In this case, all the indoor units installed must not be operated concurrently under any circumstances. Otherwise, the air conditioner may not run properly and trouble may occur.

Example: When 3 indoor units are connected

at 230V

It is therefore possible to connect 3 units with respective capacities of 7500 + 11900 + 17500. However, since this combination is not found in the 3-room operation column of Table 1, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the 3 indoor units to match one of the combinations found in the 2-room operation column of Table 1.

at 208V

It is therefore possible to connect 3 units with respective capacities of 7500 + 11900 + 17500. However, since this combination is not found in the 3-room operation column of Table 2, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the 3 indoor units to match one of the combinations found in the 2-room operation column of Table 2.

If the following holds true

Rated cooling capacity of CMH1972 outdoor unit: C=19100 (BTU/h) Rated cooling capacity of indoor units: K1, K2, ... (BTU/h)

Then:

C x 2 (200%) K1 + K2 + .......

19100 x 2 7500 + 11900 + 17500 38200 36900

If the following holds true

Rated cooling capacity of CMH1972 outdoor unit: C=19100 (BTU/h) Rated cooling capacity of indoor units: K1, K2, ... (BTU/h)

Then:

C x 2 (200%) K1 + K2 + .......

19100 x 2 7500 + 11900 + 17500 38200 36900

NOTE

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

< Combinations of operatable indoor units >

Voltage Rating : 230V 60Hz

CMH1972

(Rated cooling capacity at 230V: 19100 BTU/h)

Table 1

COOLING

Total Performance Total Performance

Capacity ( Min.

Single-room

Operation

2-room

Operation

3-room

Operation

Indoor Unit Combination

7500 = 7500 7500 7500 ( 4700

9000 = 9000 9000 9000 ( 4700 11900 = 11900 11900 11900 ( 5100 17500 = 17500 17500 17500 ( 5400

7500+7500 = 15000 7500 7500 15000 ( 6800

7500+9000 = 16500 7485 9015 16500 ( 6800

7500+11900 = 19400 6716 10684 17400 ( 6800

7500+17500 = 25000 5507 12893 18400 ( 7100

9000+9000 = 18000 8500 8500 17000 ( 6800

9000+11900 = 20900 7627 10073 17700 ( 7100

9000+17500 = 26500 6353 12347 18700 ( 7100 11900+11900 = 23800 9200 9200 18400 ( 6800 11900+17500 = 29400 7728 11372 19100 ( 7100

7500+7500+7500 = 22500 6000 6000 6000 18000 ( 8500

7500+7500+9000 = 24000 5742 5742 6916 18400 ( 9800

7500+7500+11900 = 26900 5263 5263 8373 18900 ( 9800

7500+7500+17500 = 32500 4400 4400 10300 19100 ( 9800

7500+9000+9000 = 25500 5603 6749 6749 19100 ( 9800

7500+9000+11900 = 28400 5032 6062 8006 19100 ( 9800

7500+9000+17500 = 34000 4202 5062 9837 19100 ( 9800

7500+11900+11900 = 31300 4567 7266 7266 19100 ( 9800

9000+9000+9000 = 27000 6367 6367 6367 19100 ( 9800

9000+9000+11900 = 29900 5752 5752 7597 19100 ( 9800

9000+11900+11900 = 32800 5245 6927 6927 19100 ( 9800 11900+11900+11900 = 35700 6367 6367 6367 19100 ( 9800

Room Room Room Room Room Room

ABC

The table lists the wall-mounted type of indoor units as representative models.

Indoor Unit Capacity (BTU/h)

-

Max. )

-

8800 ) 8500 8500 ( 6100-14600 )

-

10900 ) 12200 12200 ( 6100-16000 )

-

12200 ) 14300 14300 ( 6400-16700 )

-

19100 ) 20400 20400 ( 6800-24800 )

-

17400 ) 8500 8500 17000 ( 6800-21800 )

-

19100 ) 8525 12275 20800 ( 7100-24800 )

-

19100 ) 8358 14042 22400 ( 7100-24800 )

-

19100 ) 7000 16800 23800 ( 8100-24800 )

-

19100 ) 11600 11600 23200 ( 7800-24800 )

-

19100 ) 10800 12600 23400 ( 7800-24800 )

-

19100 ) 9075 15125 24200 ( 8100-24800 )

-

19100 ) 11900 11900 23800 ( 7800-24800 )

-

19100 ) 10129 14471 24600 ( 8100-24800 )

-

19100 ) 7800 7800 7800 23400 ( 9200-24800 )

-

19100 ) 6919 6919 9963 23800 ( 10200-24800 )

-

19100 ) 6576 6578 11048 24200 ( 10900-24800 )

-

19100 ) 5636 5636 13527 24800 ( 11600-24800 )

-

19100 ) 6237 8981 8981 24200 ( 11600-24800 )

-

19100 ) 5971 8598 10031 24600 ( 11600-24800 )

-

19100 ) 5124 7379 12298 24800 ( 11600-24800 )

-

19100 ) 5688 9556 9556 24800 ( 11600-24800 )

-

19100 ) 8267 8267 8267 24800 ( 11600-24800 )

-

19100 ) 7832 7832 9137 24800 ( 11600-24800 )

-

19100 ) 7440 8680 8680 24800 ( 11600-24800 )

-

19100 ) 8267 8267 8267 24800 ( 11600-24800 )

HEATING

ABC

NOTE

7500 : KMHS0772 9000 : KMHS0972 11900 : KMHS1272 17500 : KMHS1872

Capacity ( Min.-Max. )

-2-

Voltage Rating : 208V 60Hz

CMH1972

(Rated cooling capacity at 208V: 19100 BTU/h)

Table 2

COOLING

Total Performance Total Performance

Capacity ( Min.

Single-room

Operation

2-room

Operation

3-room

Operation

Indoor Unit Combination

7500 = 7500 7500 7500 ( 4700

9000 = 9000 9000 9000 ( 4700 11900 = 11900 11900 11900 ( 5100 17500 = 17500 17500 17500 ( 5400

+

7500

7500+11900 = 19400 6716 10684 17400 ( 6800

7500+17500 = 25000 5507 12893 18400 ( 7100

9000

9000+11900 = 20900 7627 10073 17700 ( 7100

9000+17500 = 26500 6353 12347 18700 ( 7100 11900+11900 = 23800 9200 9200 18400 ( 6800 11900+17500 = 29400 7728 11372 19100 ( 7100

7500

7500+11900+11900 = 31300 4567 7266 7266 19100 ( 9800

9000

9000+11900+11900 = 32800 5245 6927 6927 19100 ( 9800 11900+11900+11900 = 35700 6367 6367 6367 19100 ( 9800

7500 = 15000 7500 7500 15000 ( 6800

+

9000 = 16500 7485 9015 16500 ( 6800

+

9000 = 18000 8500 8500 17000 ( 6800

+ + + + + + +

+ +

+

7500 7500 7500+11900 = 26900 5263 5263 8373 18900 ( 9800 7500+17500 = 32500 4400 4400 10300 19100 ( 9800 9000 9000+11900 = 28400 5032 6062 8006 19100 ( 9800 9000+17500 = 34000 4202 5062 9837 19100 ( 9800

9000 9000+11900 = 29900 5752 5752 7597 19100 ( 9800

7500 = 22500 6000 6000 6000 18000 ( 8500

+

9000 = 24000 5742 5742 6916 18400 ( 9800

+

9000 = 25500 5603 6749 6749 19100 ( 9800

+

9000 = 27000 6367 6367 6367 19100 ( 9800

Room Room Room Room Room Room

ABC

The table lists the wall-mounted type of indoor units as representative models.

Indoor Unit Capacity (BTU/h)

-

Max. )

-

8800 ) 8500 8500 ( 6100-14600 )

-

10900 ) 12200 12200 ( 6100-16000 )

-

12200 ) 14300 14300 ( 6400-16700 )

-

19100 ) 20400 20400 ( 6800-24400 )

-

17400 ) 8500 8500 17000 ( 6800-21800 )

-

19100 ) 8525 12275 20800 ( 7100-24800 )

-

19100 ) 8358 14042 22400 ( 7100-24800 )

-

19100 ) 7000 16800 23800 ( 8100-24800 )

-

19100 ) 11600 11600 23200 ( 7800-24800 )

-

19100 ) 10800 12600 23400 ( 7800-24800 )

-

19100 ) 9075 15125 24200 ( 8100-24800 )

-

19100 ) 11900 11900 23800 ( 7800-24800 )

-

19100 ) 10129 14471 24600 ( 8100-24800 )

-

19100 ) 7800 7800 7800 23400 ( 9200-24800 )

-

19100 ) 6919 6919 9963 23800 ( 10200-24800 )

-

19100 ) 6576 6576 11048 24200 ( 10900-24800 )

-

19100 ) 5636 5636 13527 24800 ( 11600-24800 )

-

19100 ) 6237 8981 8981 24200 ( 11600-24800 )

-

19100 ) 5971 8598 10031 24600 ( 11600-24800 )

-

19100 ) 5124 7379 12298 24800 ( 11600-24800 )

-

19100 ) 5688 9556 9556 24800 ( 11600-24800 )

-

19100 ) 8267 8267 8267 24800 ( 11600-24800 )

-

19100 ) 7832 7832 9137 24800 ( 11600-24800 )

-

19100 ) 7440 8680 8680 24800 ( 11600-24800 )

-

19100 ) 8267 8267 8267 24800 ( 11600-24800 )

HEATING

ABC

NOTE

7500 : KMHS0772 9000 : KMHS0972 11900 : KMHS1272 17500 : KMHS1872

Capacity ( Min.-Max. )

-3-

Save this Combination Table!

Please be sure to hand over this sheet to the user.

4-Room Outdoor Unit Combination Table

CMH2472

The combinations of the indoor units listed in Table 1 and Table 2 are combinations solely of those units which can be operated concurrently. In addition to the combinations listed in the table, other combinations of indoor units are possible provided that the following conditions are satisfied.

Conditions:

1. At least two or more indoor units must be connected to the multi outdoor unit. It is not acceptable for only one indoor unit to be connected.

2. The total rated cooling capacity of the indoor units to be connected must be no more than 200% of the rated cooling capacity of the outdoor unit.

CAUTION

In this case, all the indoor units installed must not be operated concurrently under any circumstances. Otherwise, the air conditioner may not run properly and trouble may occur.

Example: When 4 indoor units are connected

at 230V If the following holds true

Rated cooling capacity of CMH2472 outdoor unit: C=23200 (BTU/h) Rated cooling capacity of indoor units: K1, K2, ... (BTU/h)

Then:

C x 2 (200%) K1 + K2 + .......

23200 x 2 7500 + 7500 + 7500 + 17500 46400 40000

It is therefore possible to connect 4 units with respective capacities of 7500 + 7500 + 7500 + 17500. However, since this combination is not found in the 4-room operation column of Table 1, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the 4 indoor units to match one of the combinations found in the 3-room operation column of Table 1.

at 208V If the following holds true

Rated cooling capacity of CMH2472 outdoor unit: C=23200 (BTU/h) Rated cooling capacity of indoor units: K1, K2, ... (BTU/h)

Then:

C x 2 (200%) K1 + K2 + .......

23200 x 2 7500 + 7500 + 7500 + 17500 46400 40000

It is therefore possible to connect 4 units with respective capacities of 7500 + 7500 + 7500 + 17500. However, since this combination is not found in the 4-room operation column of Table 2, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the 4 indoor units to match one of the combinations found in the 3-room operation column of Table 2.

NOTE

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

< Combinations of operatable indoor units >

(

)

(

)

(

)

Voltage Rating : 230V 60Hz

CMH2472

(Rated cooling capacity at 230V: 23200 BTU/h)

Table 1

Single-room

Operation

2-room

Operation

3-room

Operation

Indoor Unit Combination

7500 = 7500 7500 7500 ( 4700

9000 11900 17500 24200

7500 + 7500

7500 + 9000

7500 + 11900

7500 + 17500

7500 + 24200

9000 + 9000

9000 + 11900

9000 + 17500

9000 + 24200 11900 + 11900 11900 + 17500 11900 + 24200 17500 + 17500

7500 + 7500 + 7500=22500 7333 7333 7333 22000

7500 + 7500 + 9000=24000 6990 6990 8420 22400(9800-23200

7500 + 7500 + 11900=26900 6405 6405 10190 23000(9800-23200

7500 + 7500 + 17500=32500 5345 5345 12511 23200(9800-23200

7500 + 9000 + 9000=25500 6688 8056 8056 22800(9800-23200

7500 + 9000 + 11900=28400 6113 7363 9725 23200(9800-23200

7500 + 9000 + 17500=34000 5104 6148 11948 23200(9800-23200

7500 + 11900 + 11900=31300 5548 8826 8826 23200(9800-23200

7500 + 11900 + 17500=36900 4704 7484 11012 23200(9800-23200

9000 + 9000 + 9000=27000 7733 7733 7733 23200(9800-23200

9000 + 9000 + 11900=29900 6986 6986 9227 23200(9800-23200

9000 + 9000 + 17500=35500 5883 5883 11433 23200(9800-23200

9000 + 11900 + 11900=32800 6371 8415 8415 23200(9800-23200

9000 + 11900 + 17500=38400 5441 7186 10573 23200(9800-23200 11900 + 11900 + 11900=35700 7733 7733 7733 23200(9800-23200 11900 + 11900 + 17500=41300 6683 6683 9834 23200 ( 9800-23200 ) 8517 8517 12167 29200 ( 11600-29200 )

= = = = = = = = = = = = = = = = =

Room Room Room Room Room Room Room Room

ABCDCapacity ( Min.

9000 9000 9000 11900 11900 11900(5100-12200 17500 17500 17500(5400-19700 24200 23200 23200 ( 5400-23200 ) 27200 27200 ( 6800-27200 ) 15000 7500 7500 15000 16500 7485 9015 16500(6800-19700 19400 7488 11912 19400(6800-22800 25000 6705 15695 22400(7100-23200 31700 5488 17712 23200(7100-23200 18000 9000 9000 18000(6800-21400 20900 8618 11382 20000(6800-23200 26500 7746 15054 22800(7100-23200 33200 6306 16894 23200(7100-23200 23800 11200 11200 22400(6800-23200 29400 9387 13813 23200(7100-23200 36100 7660 15540 23200(7100-23200 35000 11600 11600 23200 ( 7100-23200 ) 14600 14600 29200 ( 8100-29200 )

COOLING HEATING

Total Performance Total Performance

Indoor Unit Capacity (BTU/h)

-

4700-10900

6800-17400

8500-23200

NOTE

7500 : KMHS0772 9000 : KMHS0972 11900 : KMHS1272 17500 : KMHS1872 24200 : KMHS2472

Max. ) A B C D Capacity ( Min.-Max. )

8800 ) 8500 8500 ( 6100-14600 )

12200 12200(6100-16000 14300 14300(6400-16700 20400 20400(6800-26200

8500 8500 17000(6800-21800 8525 12275 20800(7100-25400 8507 14293 22800(7100-28200 8294 19906 28200(8100-29200

6636 22564 29200(8100-29200 12200 12200 24400(7800-29000 11908 13892 25800(7800-29000 10725 17875 28600(8100-29200

8688 20512 29200(8100-29200 13600 13600 27200(7800-29000 11941 17059 29000(8100-29200

9657 19543 29200(8100-29200

8467 8467 8467 25400(9200-29000

7907 7907 11386 27200(10200-29200

7663 7663 12874 28200(10900-29200

6636 6636 15927 29200(11600-29200

7371 10614 10614 28600(11600-29200

7039 10136 11825 29000(11600-29200

6033 8688 14479 29200(11600-29200

6697 11251 11251 29200(11600-29200

5748 9657 13795 29200(11600-29200

9733 9733 9733 29200(11600-29200

9221 9221 10758 29200(11600-29200

7964 7964 13273 29200(11600-29200

8760 10220 10220 29200(11600-29200

7617 8887 12696 29200(11600-29200

9733 9733 9733 29200(11600-29200

(Concurrent operation of 4 indoor units prohibited)

This multi outdoor unit allows up to four indoor units to be connected. However, all four indoor units must not be operated concurrently.

4-room

Operation

IMPORTANT!

Otherwise, the air conditioner may not run properly. Up to three indoor units may be operated concurrently.

The table lists the wall-mounted type of indoor units as representative models.

-2-

(

)

(

)

(

)

Voltage Rating : 208V 60Hz

CMH2472

(Rated cooling capacity at 208V: 23200 BTU/h)

Table 2

Single-room

Operation

2-room

Operation

3-room

Operation

Indoor Unit Combination

7500 = 7500 7500 7500 ( 4700

9000 11900 17500 24200

7500 + 7500

7500 + 9000

7500 + 11900

7500 + 17500

7500 + 24200

9000 + 9000

9000 + 11900

9000 + 17500

9000 + 24200 11900 + 11900 11900 + 17500 11900 + 24200 17500 + 17500

7500 + 7500 + 7500=22500 7333 7333 7333 22000

7500 + 7500 + 9000=24000 6990 6990 8420 22400(9800-23200

7500 + 7500 + 11900=26900 6405 6405 10190 23000(9800-23200

7500 + 7500 + 17500=32500 5345 5345 12511 23200(9800-23200

7500 + 9000 + 9000=25500 6688 8056 8056 22800(9800-23200

7500 + 9000 + 11900=28400 6113 7363 9725 23200(9800-23200

7500 + 9000 + 17500=34000 5104 6148 11948 23200(9800-23200

7500 + 11900 + 11900=31300 5548 8826 8826 23200(9800-23200

7500 + 11900 + 17500=36900 4704 7484 11012 23200(9800-23200

9000 + 9000 + 9000=27000 7733 7733 7733 23200(9800-23200

9000 + 9000 + 11900=29900 6986 6986 9227 23200(9800-23200

9000 + 9000 + 17500=35500 5883 5883 11433 23200(9800-23200

9000 + 11900 + 11900=32800 6371 8415 8415 23200(9800-23200

9000 + 11900 + 17500=38400 5441 7186 10573 23200(9800-23200 11900 + 11900 + 11900 11900 + 11900 + 17500

= = = = = = = = = = = = = = = = =

= =

Room Room Room Room Room Room Room Room

ABCDCapacity ( Min.

9000 9000 9000 11900 11900 11900(5100-12200 17500 17500 17500(5400-19700 24200 22400 22400 ( 5400-22400 ) 25800 25800 ( 6800-25800 ) 15000 7500 7500 15000 16500 7485 9015 16500(6800-19700 19400 7488 11912 19400(6800-22800 25000 6705 15695 22400(7100-23200 31700 5488 17712 23200(7100-23200 18000 9000 9000 18000(6800-21400 20900 8618 11382 20000(6800-23200 26500 7746 15054 22800(7100-23200 33200 6306 16894 23200(7100-23200 23800 11200 11200 22400(6800-23200 29400 9387 13813 23200(7100-23200 36100 7660 15540 23200(7100-23200 35000 11600 11600 23200 ( 7100-23200 ) 14600 14600 29200 ( 8100-29200 )

35700 7733 7733 7733 23200(9800-23200 41300 6683 6683 9834 23200 ( 9800-23200 ) 8517 8517 12167 29200 ( 11600-29200 )

COOLING HEATING

Total Performance

Indoor Unit Capacity (BTU/h)

-

4700-10900

6800-17400

8500-23200

NOTE

7500 : KMHS0772 9000 : KMHS0972 11900 : KMHS1272 17500 : KMHS1872 24200 : KMHS2472

Max. ) A B C D Capacity ( Min.-Max. )

8800 ) 8500 8500 ( 6100-14600 )

12200 12200(6100-16000 14300 14300(6400-16700 20400 20400(6800-24400

8500 8500 17000(6800-21800 8525 12275 20800(7100-25400 8507 14293 22800(7100-28200 8294 19906 28200(8100-29200

6636 22564 29200(8100-29200 12200 12200 24400(7800-28200 11908 13892 25800(7800-29000 10725 17875 28600(8100-29200

8688 20512 29200(8100-29200 13600 13600 27200(7800-28600 11941 17059 29000(8100-29200

9657 19543 29200(8100-29200

8467 8467 8467 25400(9200-29000

7907 7907 11386 27200(10200-29200

7663 7663 12874 28200(10900-29200

6636 6636 15927 29200(11600-29200

7371 10614 10614 28600(11600-29200

7039 10136 11825 29000(11600-29200

6033 8688 14479 29200(11600-29200

6697 11251 11251 29200(11600-29200

5748 9657 13795 29200(11600-29200

9733 9733 9733 29200(11600-29200

9221 9221 10758 29200(11600-29200

7964 7964 13273 29200(11600-29200

8760 10220 10220 29200(11600-29200

7617 8887 12696 29200(11600-29200

9733 9733 9733 29200(11600-29200

Total Performance

(Concurrent operation of 4 indoor units prohibited)

This multi outdoor unit allows up to four indoor units to be connected. However, all four indoor units must not be operated concurrently.

4-room

Operation

IMPORTANT!

Otherwise, the air conditioner may not run properly. Up to three indoor units may be operated concurrently.

The table lists the wall-mounted type of indoor units as representative models.

-3-

Save this Combination Table!

Please be sure to hand over this sheet to the user.

4-Room Outdoor Unit Combination Table

CMH3172

The combinations of the indoor units listed in Table 1 and Table 2 are combinations solely of those units which can be operated concurrently. In addition to the combinations listed in the table, other combinations of indoor units are possible provided that the following conditions are satisfied.

Conditions:

1. At least two or more indoor units must be connected to the multi outdoor unit. It is not acceptable for only one indoor unit to be connected.

2. The total rated cooling capacity of the indoor units to be connected must be no more than 200% of the rated cooling capacity of the outdoor unit.

CAUTION

In this case, all the indoor units installed must not be operated concurrently under any circumstances. Otherwise, the air conditioner may not run properly and trouble may occur.

Example: When 4 indoor units are connected

at 230V

It is therefore possible to connect 4 units with respective capacities of 7500 + 7500 + 11900 + 24200. However, since this combination is not found in the 4-room operation column of Table 1, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the 4 indoor units to match one of the combinations found in the 3-room operation column of Table 1.

at 208V

It is therefore possible to connect 4 units with respective capacities of 7500 + 7500 + 11900 + 24200. However, since this combination is not found in the 4-room operation column of Table 2, operating all these units concurrently may result in trouble. At a time like this, shut down at least one of the 4 indoor units to match one of the combinations found in the 3-room operation column of Table 2.

If the following holds true

Rated cooling capacity of CMH3172 outdoor unit: C=30600 (BTU/h) Rated cooling capacity of indoor units: K1, K2, ... (BTU/h)

Then:

C x 2 (200%) K1 + K2 + .......

30600 x 2 7500 + 7500 + 11900 + 24200 61200 51100

If the following holds true

Rated cooling capacity of CMH3172 outdoor unit: C=28600 (BTU/h) Rated cooling capacity of indoor units: K1, K2, ... (BTU/h)

Then:

C x 2 (200%) K1 + K2 + .......

28600 x 2 7500 + 7500 + 11900 + 24200 57200 51100

NOTE

Be sure to operate the air conditioning system only when 2 or more indoor units have been installed. If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction.

Sanyo CMH1972, CMH2472, CMH3172, KMHS0772, KMHS0972 Technical & Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual