Sanyo CM2472 Technical & Service Manual
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Sanyo CM2472 Technical & Service Manual

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TECHNICAL & SERVICE MANUAL
OUTDOOR UNIT : CM1972
DC INVERTER MULTI-SYSTEM AIR CONDITIONER
CM1972
CM2472
CM3172
CM2472
CM3172
Capacity at 230V
Outdoor Model No.
19,700 BTU/h
25,400 BTU/h
30,600 BTU/h
Product Code No.
CM1972
1 852 330 27
CM2472
1 852 330 28
CM3172
1 852 330 29
< Applicable Indoor Units >
Wall mounted type
●
KMS0772
KMS0972
KMS1272
KMS1872
KMS2472
NOTE
For details about the combination, refer to
"Unit Combination Table" in the Appendix
of this manual.
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
FILE NO.
Destination: North America
IMPORTANT
REFERENCE NO.
SM
700666-04

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  • Page 1 TECHNICAL & SERVICE MANUAL OUTDOOR UNIT : CM1972 CM2472 FILE NO. CM3172 Destination: North America DC INVERTER MULTI-SYSTEM AIR CONDITIONER Capacity at 230V Product Code No. Outdoor Model No. 19,700 BTU/h CM1972 1 852 330 27 CM2472 1 852 330 28...
  • Page 2 Important! When Transporting Please Read Before Starting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees This air conditioning system meets strict safety and operating when lifting to reduce strain on your back. Sharp edges or thin standards.

  • Page 3: Table Of Contents

    Table of Contents 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.

  • Page 4: Applicable Indoor Units

    APPLICABLE INDOOR UNITS Indoor Unit KMS0772 KMS0972 KMS1272 KMS1872 KMS2472 Multi-Outdoor Unit 3-Room CM1972 4-Room CM2472 4-Room CM3172 NOTE The table lists the wall-mounted type of indoor units as representative models.

  • Page 5: Operating Range

    1. OPERATING RANGE Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp. Maximum 95 °F D.B. / 71 °F W.B. 115 °F D.B. Cooling Minimum 67 °F D.B. / 57 °F W.B. 67 °F D.B.

  • Page 6: Specifications

    2. SPECIFICATIONS 2-1. Unit Specifications CM1972 Outdoor Unit KMS0972 Indoor Unit × < 230V > Type 3-Room Multi Outdoor Unit Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating 230V Single-Phase 60Hz Cooling Total Capacity BTU/h 19,700 ( 9,800 to 19,700 ) 5.80 ( 2.90 to 5.80 )
  • Page 7 CM1972 Outdoor Unit KMS0972 Indoor Unit × < 208V > Type 3-Room Multi Outdoor Unit Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating 208V Single-Phase 60Hz Cooling Total Capacity BTU/h 19,700 ( 9,800 to 19,700 ) 5.80 ( 2.90 to 5.80 ) Sensible Capacity...
  • Page 8 1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : KMS0972 3units Outdoor Unit : CM2472 1unit 2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B.
  • Page 9 1. The values shown in performance section and electrical rating section above are based on the following unit combination. For other combination unit, please refer to the "Unit Combination Tables" in this manual. Indoor Unit : KMS0972 3units Outdoor Unit : CM2472 1unit 2. Rating conditions are: Cooling : Indoor air temp. 80°F D.B./ 67°F W.B.
  • Page 10 CM3172 Outdoor Unit KMS0972 Indoor Unit × < 230V > Type 4-Room Multi Outdoor Unit Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating 230V Single-Phase 60Hz Cooling Total Capacity BTU/h 30,600 ( 9,800 to 30,600 ) 9.00 ( 2.90 to 9.00 ) Sensible Capacity...
  • Page 11 CM3172 Outdoor Unit KMS0972 Indoor Unit × < 208V > Type 4-Room Multi Outdoor Unit Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating 208V Single-Phase 60Hz Cooling Total Capacity BTU/h 28,600 ( 9,800 to 28,600 ) 8.40 ( 2.90 to 8.40 ) Sensible Capacity...

  • Page 12: Major Component Specifications

    2-2. Major Component Specifications 2-2-1. Outdoor Unit CM1972 Outdoor Unit Control PCB Part No. CB-CM1972 Controls Microprocessor Control Circuit Fuse 250V 25A Compressor Type DC Twin Rotary (Hermetic) Compressor Model / Nominal Output 5KD240XAB21 / 1,700W Compressor Oil ... Amount Pints (cc) FV50S ...
  • Page 13 CM2472 Outdoor Unit Control PCB Part No. CB-CM2572 Controls Microprocessor Control Circuit Fuse 250V 25A Compressor Type DC Twin Rotary (Hermetic) Compressor Model / Nominal Output 5KD240XAB21 / 1,700W Compressor Oil ... Amount Pints (cc) FV50S ... 1.91 (900) Coil Resistance (Ambient Temp. 68 °F (20 °C)) U - V : 0.720...
  • Page 14 CM3172 Outdoor Unit Control PCB Part No. CB-CM3172 Controls Microprocessor Control Circuit Fuse 250V 25A Compressor Type DC Twin Rotary (Hermetic) Compressor Model / Nominal Output 5JD420XAB22 / 3,000W Compressor Oil ... Amount Pints (cc) FV50S ... 2.55 (1,200) Coil Resistance (Ambient Temp. 68 °F (20 °C)) U - V : 0.435 V - W :...

  • Page 15: Other Component Specifications

    2-3. Other Component Specifications Quantity of Sensor Model No. Sensor Name of sensor CM1972 CM2472 CM3172 Outdoor air temp sensor TKS295B Outdoor heat exchanger sensor TKS292B AW / AN sensor TKS292B 1 / 1 1 / 1 1 / 1...

  • Page 16: Dimensional Data

    3. DIMENSIONAL DATA Outdoor Unit CM1972 23-15/16 5-11/32 15/32 11-17/32 35-7/16(900) 2-15/16 Wide tube service valve dia.3/8" (9.52) × 3 Narrow tube service valve dia.1/4" (6.35) × 3 2-1/32 4-1/2 1-13/16 2-1/16 Unit: inch(mm)
  • Page 17 CM2472 Outdoor Unit 23-15/16 5-11/32 15/32 11-17/32 35-7/16(900) 2-15/16 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 2-1/32 4-1/2 1-13/16 2-1/16 2-13/32 Unit: inch(mm)
  • Page 18 CM3172 Outdoor Unit 23-15/16 5-11/32 15/32 11-17/32 35-7/16(900) 2-15/16 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 2-1/32 4-1/2 1-13/16 2-1/16 2-13/32 Unit: inch(mm)

  • Page 19: Refrigerant Flow Diagram

    4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Outdoor Unit CM1972 Indoor unit Outdoor unit Service valve on wide tube Wide tube Main O.D.3/8" accumulator accumulator O.D.3/8" O.D.3/8" High pressure Header switch H.P. Electric expansion valve Service valve on narrow tube Narrow tube O.D.1/4"...
  • Page 20 Outdoor Unit CM2472 Indoor unit Outdoor unit Service valve on wide tube Wide tube Main O.D.3/8" accumulator accumulator O.D.3/8" High pressure O.D.3/8" switch H.P. O.D.1/2" Header Electric expansion Service valve on valve narrow tube Narrow tube O.D.1/4" O.D.1/4" O.D.1/4" O.D.1/4"...
  • Page 21 Outdoor Unit CM3172 Indoor unit Outdoor unit Service valve on wide tube Wide tube Main O.D.3/8" accumulator accumulator O.D.3/8" O.D.1/2" High pressure switch H.P. O.D.1/2" Header Electric expansion Service valve on valve narrow tube Narrow tube O.D.1/4" O.D.1/4" O.D.1/4" O.D.1/4" Strainer Header Cooling cycle...

  • Page 22: Performance Data

    5. PERFORMANCE DATA 5-1. Temperature Charts 5-1-1. Temperature Charts (CM1972) Outdoor Unit CM1972 Indoor Unit KMS0772 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan HH fan (1.3) (1.2) (1.1)
  • Page 23 Outdoor Unit CM1972 Indoor Unit KMS0972 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan HH fan (1.3) (1.2) (1.1) (1.0) 77 (25) (30) (35) (40) Outdoor air temperature °F (°C) (2) Operating current performance chart Lo fan...
  • Page 24 Outdoor Unit CM1972 Indoor Unit KMS1272 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan HH fan (1.2) (1.1) (1.0) (0.9) 77 (25) (30) (35) (40) Outdoor air temperature °F (°C) (2) Operating current performance chart Lo fan...
  • Page 25 Outdoor Unit CM1972 Indoor Unit KMS1872 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart HH fan Lo fan Hi fan (1.2) (1.1) (1.0) (0.9) (25) (30) (35) (40) Outdoor air temperature °F (°C) (2) Operating current performance chart Lo fan Hi fan...
  • Page 26 5-1-2. Temperature Charts (CM2472) Outdoor Unit CM2472 Indoor Unit KMS0772 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan HH fan (1.3) (1.2) (1.1) (1.0) 77...
  • Page 27 Outdoor Unit CM2472 Indoor Unit KMS0972 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan HH fan (1.3) (1.2) (1.1) (1.0) 77 (25) (30) (35) (40) Outdoor air temperature °F (°C)
  • Page 28 Outdoor Unit CM2472 Indoor Unit KMS1272 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan HH fan (1.2) (1.1) (1.0) (0.9) 77 (25) (30) (35) (40) Outdoor air temperature °F (°C)
  • Page 29 Outdoor Unit CM2472 Indoor Unit KMS1872 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart HH fan Lo fan Hi fan (1.2) (1.1) (1.0) (0.9) (25) (30) (35) (40) Outdoor air temperature °F (°C)
  • Page 30 Outdoor Unit CM2472 Indoor Unit KMS2472 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan HH fan (1.2) (1.1) (1.0) (0.9) (25) (30) (35) (40) Outdoor air temperature °F (°C)
  • Page 31 5-1-3. Temperature Charts (CM3172) Outdoor Unit CM3172 Indoor Unit KMS0772 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan Hi fan HH fan (1.2) (1.0) (0.8) (0.6) (25) (30)
  • Page 32 Outdoor Unit CM3172 Indoor Unit KMS0972 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan Hi fan HH fan (1.2) (1.0) (0.8) (0.6) (25) (30) (35) (40) Outdoor air temperature °F (°C) (2) Operating current performance chart...
  • Page 33 Outdoor Unit CM3172 Indoor Unit KMS1272 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan Hi fan HH fan (1.2) (1.0) (0.8) (0.6) (25) (30) (35) (40) Outdoor air temperature °F (°C) (2) Operating current performance chart...
  • Page 34 Outdoor Unit CM3172 Indoor Unit KMS1872 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan (1.2) (1.0) (0.8) (0.6) (25) (30) (35) (40) Outdoor air temperature °F (°C) (2) Operating current performance chart Lo fan Hi fan...
  • Page 35 Outdoor Unit CM3172 Indoor Unit KMS2472 × Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (230V, 60Hz) (1) Low pressure performance chart Lo fan Hi fan (1.2) (1.0) (0.8) (0.6) (25) (30) (35) (40) Outdoor air temperature °F (°C) (2) Operating current performance chart Lo fan Hi fan...

  • Page 36: Cooling Capacity

    5-2. Cooling Capacity Outdoor Unit : CM1972 : KMS0972 Indoor Unit × Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: 19,700 BTU/h AIR FLOW RATE: 883 CFM INDOOR OUTDOOR ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C) W.B.
  • Page 37 Outdoor Unit : CM2472 : KMS0972 Indoor Unit × Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: 25,400 BTU/h AIR FLOW RATE: 883 CFM INDOOR OUTDOOR ENT. TEMP. °F (°C) AMBIENT TEMP. °F (°C) W.B.
  • Page 38 Outdoor Unit : CM3172 : KMS0972 Indoor Unit × Power Supply : 230V Single Phase 60Hz < Cooling Capacity > 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.

  • Page 39: Electrical Data

    6. ELECTRICAL DATA 6-1. Electric Wiring Diagrams Outdoor Unit CM1972 To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts. 8FA2-5257-58800-1...
  • Page 40 Outdoor Unit CM2472 To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts. 8FA2-5257-59000-1...
  • Page 41 Outdoor Unit CM3172 To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts. 8FA2-5257-89300-1...

  • Page 42: Functions

    7. FUNCTIONS 7-1. Explanation of Functions The numerical values such as temperature, frequency, time and current in parentheses are an example NOTE of CM3172 and the values are different from the other models. Control/conditions Unit operation Explanation INITIAL Breaker is ON. Power is supplied to the indoor and outdoor unit control circuits, however the unit remains stopped.
  • Page 43 Control/conditions Unit operation Explanation COOL The ON/OFF operation The operation lamp illuminates. The outdoor unit does not operate for 3 minutes button on the remote even after the breaker is turned ON. The indoor fan operates at the set fan speed. controller is pressed.
  • Page 44 (1/f fluctuation fan) Control/conditions Unit operation Explanation SENSOR The ON/OFF operation The operation lamp illuminates. The outdoor unit does not operate for 3 minutes button on the remote even after the breaker is turned ON. The indoor fan operates at the set fan speed. controller is pressed.

  • Page 45: Protective Functions

    7-2. Protective Functions NOTE The numerical values such as temperature, frequency, time and current in parentheses are an example of CM3172 and the values are different from the other models. 7-2-1. Current Control The operating current may rise as a result of causes including increasing cooling loads or decreases in power voltage.
  • Page 46 (2) Current control The operating frequency upper limits shown in the figure below are established for frequency reduction and increase-prohibit. Current(A) Example of operation during cooling Trip Hz reduction Hz reduction Hz increase prohibit Hz increase prohibit Hz reduction (16) Hz increase prohibit (15.6) Frequency (Hz)

  • Page 47: Troubleshooting

    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 outdoor- side 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.

  • Page 48: Trouble Diagnosis By Error Monitop Lamps

    8-2. Trouble Diagnosis by Error Monitor Lamps To prevent electric shock, do not inspect or repair until WARNING 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.

  • Page 49: Checking The Outdoor System

    8-3. Checking the Outdoor System 8-3-1. Checking the outdoor unit Work procedure Check items (unit operation) • Apply 220 V AC between terminals L1 and L2 on the • The LED (red) on the control board must illuminate. outdoor unit terminal plate. •...

  • Page 50: Trouble Diagnosis Of Each Part

    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. Indoor unit Outdoor unit Others Problems No. of Inspection Points for Each part Inspection points Self-Diagnostics check...
  • Page 51 Indoor unit Outdoor unit Others Problems No. of Inspection Points for Each part Inspection points Breaker Refrigerant gas pressure 8-4-2. Inspection Points for Each Part (1) Outdoor control circuit board Refer to 8-3-1. Checking the outdoor unit. Do not remove or insert the outdoor control circuit board connector when power is being supplied to it. NOTE (The controller will be damaged.) (2) Fuse...
  • Page 52 10 to 20 seconds for No voltage on circuit board Voltage varies each point. Model No. Sequence CM1972 CM2472 CM3172 Check the coil resistance. Check the illumination Check the resistance between the gray lead of the red Power Lamp. wire and the other wires.
  • Page 53 (7) Branch tubing temperature sensor Check that the sensor is securely contained in the thermostat holder. (8) Breaker Check whether or not the breaker has been tripped. Check that the breakers and fuses used are of the specified capacity. Check that the breaker and its line are exclusive for A/C use. (9) Refrigerant gas pressure Start a COOL test run, and messure the temperatures of the A/C intake air and discharge air.

  • Page 54: Trouble Diagnosis Of Fan Motor

    8-5. Trouble Diagnosis of Fan Motor This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil resistance, and the following procedure should be used to check the motor. Perform the trouble diagnosis by Test Run mode described on Installation Instructions of indoor unit. Important: (A) Turn OFF the power before connecting or disconnecting the motor connectors.

  • Page 55: Refrigerant R410A: Special Precautions When Servicing Unit

    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.

  • Page 56: Checklist Before Servicing

    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.

  • Page 57: Tools Specifically For R410A

    9-3. Tools Specifically for R410A For servicing, use the following tools for R410A Tool Distinction Tool Name Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Refrigerant recovery unit Vacuum pump with anti-reverse flow (*1) Tools specifically for R410A (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.

  • Page 58: In Case Of Compressor Malfunction

    9-5. In Case of Compressor Malfunction Should the compressor malfunction, be sure to make the switch to a replacement CAUTION 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 (1) Recover refrigerant...
  • Page 59 (5) Recharging Configuration and characteristics of cylinders Be sure to charge the specified amount of Valve 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.

  • Page 60: In Case Refrigerant Is Leaking

    9-6. In Case Refrigerant is Leaking Never attempt to charge additional refrigerant when refrigerant has been leaking CAUTION 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.

  • Page 61: Charging Additional Refrigerant

    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. Never charge additional refrigerant if refrigerant is leaking from the unit. Follow CAUTION instructions given in "9-6.

  • Page 62: Appendix Ainstallation Instructions

    APPENDIX A INSTALLATION INSTRUCTIONS CM1972 CM2472 CM3172 (II-852-6-4190-214-00-3)
  • Page 63 INSTALLATION CHECK SHEET ...... 26 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.
  • Page 64 IMPORTANT! Please Read Before Starting When Installing… …In a Ceiling or Wall This air conditioning system meets strict safety and operating Make sure the ceiling/wall is strong enough to hold the standards. As the installer or service person, it is an important part of your job to install or service the system so it operates unit’s weight.
  • Page 65 1. General This booklet briefly outlines where and how to install the 5. Carpenter’s level air conditioning system. Please read over the entire set 6. Sabre saw or key hole saw of instructions for the indoor and outdoor units and make 7.
  • Page 66 1-5. Additional Materials Required for Installation Refrigeration (armored) tape Insulated staples or clamps for connecting wire (See local codes) Putty Refrigeration lubricant Clamps or saddles to secure refrigerant tubing Indoor unit 2. Installation Site Selection 2-1. Indoor Unit To prevent abnormal heat generation WARNING and the possibility of fire, do not place obstacles, enclosures and...
  • Page 67 (ft.) (L1+L2+L3+L4) (ft.) (ft.) CM1972/CLM1972 150 (L1+L2+L3) 150 (L1+L2+L3) — CM2472/CLM2472 150 (L1+L2+L3+L4) 200 (L1+L2+L3+L4) 0.22 CM3172/CLM3172 150 (L1+L2+L3+L4) 230 (L1+L2+L3+L4) 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.
  • Page 68 1/2"(12.70mm) (KMS1872) 3/8"(9.52mm) 1/4"(6.35mm) Flare 3/8"(9.52mm) Union 1/2"(12.70mm) A joint for connecting tubes of different sizes (3/8"(9.52mm) 1/2"(12.70mm)) Supplied Reducer Fig. 4b (2) Connecting indoor unit for CM2472/CLM2472 Outdoor unit Indoor unit 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm)
  • Page 69 Outdoor unit Indoor unit 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 1/2"(12.70mm) (KMS1872) 1/2"(12.70mm) 1/4"(6.35mm) Fig. 4d Outdoor unit Indoor unit 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 5/8"(15.88mm) (KMS2472) 1/2"(12.70mm) 1/4"(6.35mm) Flare 1/2"(12.70mm)
  • Page 70 (3) Connecting indoor unit for CM3172/CLM3172 Outdoor unit Indoor unit 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 1/2"(12.70mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 1/2"(12.70mm) 1/4"(6.35mm) Flare 1/2"(12.70mm) Union 3/8"(9.52mm) (1/2"(12.70mm) 3/8"(9.52mm)) Supplied Reducer Fig. 4g Outdoor unit Indoor unit 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm)
  • Page 71 Outdoor unit Indoor unit 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 1/2"(12.70mm) 1/4"(6.35mm) 5/8"(15.88mm) (KMS2472) 1/2"(12.70mm) 1/4"(6.35mm) Flare 1/2"(12.70mm) Union 5/8"(15.88mm) Flare 1/2"(12.70mm) Union 3/8"(9.52mm) (1/2"(12.70mm) 5/8"(15.88mm)) (1/2"(12.70mm) 3/8"(9.52mm)) Locally purchased Supplied Reducer Fig. 4j Outdoor unit Indoor unit 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272)
  • Page 72 2-3. Outdoor Unit Exhaust fan AVOID: Hot air heat sources, exhaust fans, etc. (Fig. 5a) Heat source damp, humid or uneven locations. Obstacle above Outdoor unit choose a place as cool as possible. Min. choose a place that is well ventilated. Min.
  • Page 73 (1) Recommended dimensions of the baffle plates Air Intake Baffle Air Discharge Baffle 15/64" 6 mm) 1/4" 6.5 mm) 1/4" 6.5 mm) Fig. 5g Fig. 5h For Air Intake Dimensions Model (inch) 25-3/16 25/32 1-31/32 10-5/8 10-5/8 25/64 25/32 19/32 25-7/8 19/64 25/64 5-29/32 25/32...
  • Page 74 (3) Installation procedure 1. Air Intake Baffle 2. Air Discharge Baffle 1. Remove the panels front, top, side L and R from the (1) Left side unit and drill 4 holes of ø1/4 inch (6.5 mm) at the 1. Remove the top panel from the unit. prescribed positions.
  • Page 75 (Outer diameter 1/4"( 6.35 )) Service valve on wide tube side (Outer diameter 3/8"( 9.52 )) 2-1/32 4-1/2 1-13/16 2-1/16 Fig. 6a (2) CM2472/CLM2472 23-15/16 5-11/32 15/32 35-7/16 (900) 2-29/32 Service valve on narrow tube side (Outer diameter 1/4"( 6.35 )) Service valve on wide tube side (Outer diameter 3/8"( 9.52 ))
  • Page 76 Diagram of Outdoor Unit Installation 2-6. 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 Indoor unit D combination table that was provided with the outdoor unit. (Use caution.
  • Page 77 3. Installation Process Embedding the Tubing and Wiring 3-1. Do not connect tubes to locations that are embedded. Be sure to bind refrigerant tubing and inter-unit cables together with vinyl tape. The power cable must be obtained on-site. (#12: Less than 85 ft.) # ...
  • Page 78 NOTE Copper tubing When reaming, hold the tube end downward and be sure that no copper scraps fall into the tube. (Fig. 9) (3) Remove the flare nut from the unit and be sure to mount Reamer it on the copper tube. (4) Make a flare at the end of copper tube with a flare tool.* (Figs.
  • Page 79 Torque wrench Be sure to match refrigerant CAUTION tubing and electric wiring between indoor and outdoor Spanner units. For more details, refer to Indoor unit “Tubing Check Control” in the Technical & Service Manual. Outdoor unit Fig. 15 3-6. Insulation of Refrigerant Tubing IMPORTANT To prevent heat loss and wet floors due to dripping of con- Insulation...
  • Page 80 4. Air Purging Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. Therefore, they must be purged completely. Service pressure in the system rises valve on Manifold gauge narrow operating current rises (special for R410A) Service High-pressure valve Low-pressure...
  • Page 81 (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 pres- sure is –101 kPa (–76 cmHg). The operation time for the vacuum pump varies with tubing length and the capacity of the pump.
  • Page 82 (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)).
  • Page 83 (B) (C) Model Circuit Capasity (#12) (#14) CM1972 / CLM1972 85 (Max.) 82 (Max.) 20 A CM2472 / CLM2472 85 (Max.) 82 (Max.) 20 A CM3172 / CLM3172 85 (Max.) 100 (Max.) 20 A # ... AWG (American Wire Gauge)
  • Page 84 Electrical noise may CAUTION affect the operation. Always comply with national and local code requirements. 5-3. Wiring System Diagram 3 indoor units with CM1972/CLM1972 4 indoor units with CM2472/CLM2472, CM3172/CLM3172 Disconnect Disconnect switch switch Field supply Field supply...
  • Page 85 5-4. How to Connect Wiring to the Terminal Loose wiring may cause the WARNING terminal to overheat or result in unit malfunction. A fire hazard may also exist. There- fore, be sure all wiring is tightly connected. When connecting each power wire to the corresponding terminal, follow the instructions “How to connect wiring 9/32"...
  • Page 86 5-5. Wiring Instructions for the Outdoor Unit CAUTION Be sure to correctly align inter-unit cables A, B, C and D. Outdoor unit A Terminal board Power supply Indoor unit A (conduit) 1 2 3 4 5 6 7 8 9 10 11 12 Power: A is the indoor unit with Terminal board...
  • Page 87 Regulations on wire size differ from locality to locality. For Lock nut Cabinet field wiring requirements, please refer to your local electri- cal 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.
  • Page 88 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.

  • Page 89: Appendix B Unit Combination Tables

    Model No. of Outdoor Unit Remarks 3-Room Outdoor Unit Combination Table CM1972 OI-852-6-4180-818-00-4 4-Room Outdoor Unit Combination Table CM2472 OI-852-6-4180-819-00-4 4-Room Outdoor Unit Combination Table CM3172 OI-852-6-4180-820-00-4 NOTE Be sure to operate the air conditioning system only when 2 or more indoor units have been installed.
  • Page 90 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. Pub. OI-85264180 © SANYO 2008...
  • Page 91 < Combinations of operatable indoor units > Voltage Rating : 230V 60Hz CM1972 NOTE (Rated cooling capacity at 230V: 19700 BTU/h) 7500 : KMS0772 9000 : KMS0972 11900 : KMS1272 17500 : KMS1872 Table 1 Indoor Unit Capacity (BTU/h) COOLING Indoor Unit Combination Room Room...
  • Page 92 Voltage Rating : 208V 60Hz CM1972 NOTE (Rated cooling capacity at 208V: 19700 BTU/h) 7500 : KMS0772 9000 : KMS0972 11900 : KMS1272 17500 : KMS1872 Table 2 Indoor Unit Capacity (BTU/h) COOLING Indoor Unit Combination Room Room Room Total Performance Capacity Min.
  • Page 93 Example: When 4 indoor units are connected at 230V If the following holds true Rated cooling capacity of CM2472 outdoor unit: C=25400 (BTU/h) Rated cooling capacity of indoor units: K1, K2, ... (BTU/h) Then: C x 2 (200%) K1 + K2 + ..
  • Page 94 < Combinations of operatable indoor units > Voltage Rating : 230V 60Hz NOTE CM2472 7500 : KMS0772 (Rated cooling capacity at 230V: 25400 BTU/h) 9000 : KMS0972 11900 : KMS1272 17500 : KMS1872 24200 : KMS2472 Table 1 Indoor Unit Capacity (BTU/h)
  • Page 95 Voltage Rating : 208V 60Hz NOTE CM2472 7500 : KMS0772 (Rated cooling capacity at 208V: 24400 BTU/h) 9000 : KMS0972 11900 : KMS1272 17500 : KMS1872 24200 : KMS2472 Table 2 Indoor Unit Capacity (BTU/h) COOLING Indoor Unit Combination Total Performance...
  • Page 96 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. Pub. OI-85264180 © SANYO 2008...
  • Page 97 < Combinations of operatable indoor units > Voltage Rating : 230V 60Hz NOTE CM3172 7500 : KMS0772 (Rated cooling capacity at 230V: 30600 BTU/h) 9000 : KMS0972 11900 : KMS1272 17500 : KMS1872 24200 : KMS2472 Table 1 Indoor Unit Capacity (BTU/h) COOLING Indoor Unit Combination Room...
  • Page 98 Voltage Rating : 208V 60Hz NOTE CM3172 7500 : KMS0772 (Rated cooling capacity at 208V: 28600 BTU/h) 9000 : KMS0972 11900 : KMS1272 17500 : KMS1872 24200 : KMS2472 Table 2 Indoor Unit Capacity (BTU/h) COOLING Indoor Unit Combination Room Room Room Room...
  • Page 99 SANYO Commercial Solutions A Division of SANYO North America Corporation 1300 Michael Drive, Suite A Wood Dale, IL 60191, U.S.A. Sanyo Canada Inc. 1-300 Applewood Crescent, Concord, Ontario L4K 5C7, CANADA Oct. / 2008 (T)

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