Sanyo CM1972 Technical & Service Manual
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Sanyo CM1972 Technical & Service Manual

Dc inverter multi-system air conditioner
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See also: User Manual , Instruction and Installation Manual
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 DC INVERTER MULTI-SYSTEM AIR CONDITIONER Capacity at 230V 19,700 BTU/h 25,400 BTU/h 30,600 BTU/h CM1972 CM2472 CM3172 CM2472 CM3172 Outdoor Model No. CM1972 CM2472 CM3172 FILE NO. Destination: North America Product Code No.

  • Page 2: Please Read Before Starting

    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...

  • Page 3: Table Of Contents

    APPLICABLE INDOOR UNITS 1. OPERATING RANGE 2. SPECIFICATIONS 2-1. Unit Specifications 2-2. Major Component Specifications 2-3. Other Component Specifications 3. DIMENSIONAL DATA 4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram 5. PERFORMANCE DATA 5-1. Temperature Charts 5-2. Cooling Capacity 6. ELECTRICAL DATA 6-1.

  • Page 4: Applicable Indoor Units

    APPLICABLE INDOOR UNITS Indoor Unit 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. KMS0772 KMS0972 KMS1272 KMS1872 KMS2472...

  • 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

    33-27/32 × 40-5/8 × 16-1/4 (mm) Ibs (kg) Ibs (kg) cu.ft (m DATA SUBJECT TO CHANGE WITHOUT NOTICE. Outdoor Unit : CM1972 1unit 80°F D.B./ 67°F W.B. < 230V > Cooling ( 9,800 to 19,700 ) ( 2.90 to 5.80 )
  • Page 7 33-27/32 × 40-5/8 × 16-1/4 (mm) Ibs (kg) Ibs (kg) cu.ft (m DATA SUBJECT TO CHANGE WITHOUT NOTICE. Outdoor Unit : CM1972 1unit 80°F D.B./ 67°F W.B. < 208V > Cooling ( 9,800 to 19,700 ) ( 2.90 to 5.80 )
  • Page 8 CM2472 Outdoor Unit KMS0972 Indoor Unit × Type Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Available Voltage Range Running Amperes Power Input Power Factor SEER Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Control Fan Speeds...
  • Page 9 CM2472 Outdoor Unit KMS0972 Indoor Unit × Type Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Available Voltage Range Running Amperes Power Input Power Factor SEER Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Control Fan Speeds...
  • Page 10 CM3172 Outdoor Unit KMS0972 Indoor Unit × Type Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Available Voltage Range Running Amperes Power Input Power Factor SEER Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Control Fan Speeds...
  • Page 11 CM3172 Outdoor Unit KMS0972 Indoor Unit × Type Number of Connectable Indoor Units Number of Operatable Indoor Units Voltage Rating Total Capacity Sensible Capacity Latent Capacity Air Circulation (High) Available Voltage Range Running Amperes Power Input Power Factor SEER Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity Control Fan Speeds...

  • Page 12: Major Component Specifications

    2-2. Major Component Specifications 2-2-1. Outdoor Unit CM1972 Outdoor Unit Control PCB Part No. Controls Control Circuit Fuse Compressor Type Compressor Model / Nominal Output Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C)) Safety Device CT (Peak current cut-off control) Compressor Discharge Temp.
  • Page 13 CM2472 Outdoor Unit Control PCB Part No. Controls Control Circuit Fuse Compressor Type Compressor Model / Nominal Output Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C)) Safety Device CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp.
  • Page 14 CM3172 Outdoor Unit Control PCB Part No. Controls Control Circuit Fuse Compressor Type Compressor Model / Nominal Output Compressor Oil ... Amount Coil Resistance (Ambient Temp. 68 °F (20 °C)) Safety Device CT (Peak current cut-off control) Compressor Discharge Temp. Control Operation cut-off control in abnormal ambient Temp.

  • Page 15: Other Component Specifications

    AW / AN sensor BW / BN sensor CW / CN sensor DW / DN sensor Sensor Name Compressor temp sensor Model No. of sensor CM1972 TKS295B TKS292B TKS292B 1 / 1 TKS292B 1 / 1 TKS292B 1 / 1...

  • Page 16: Dimensional Data

    3. DIMENSIONAL DATA Outdoor Unit CM1972 23-15/16 11-17/32 35-7/16(900) 5-11/32 15/32 2-15/16 1-13/16 2-1/16 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 Unit: inch(mm)
  • Page 17 CM2472 Outdoor Unit 23-15/16 11-17/32 35-7/16(900) 5-11/32 15/32 2-15/16 1-13/16 2-1/16 2-13/32 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 Unit: inch(mm)
  • Page 18 CM3172 Outdoor Unit 23-15/16 11-17/32 35-7/16(900) 5-11/32 15/32 2-15/16 1-13/16 2-1/16 2-13/32 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 Unit: inch(mm)

  • Page 19: Refrigerant Flow Diagram

    IMPORTANT Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material.

  • Page 20: Insulation Of Refrigerant Tubing

    IMPORTANT Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material.
  • Page 21 IMPORTANT Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material.

  • Page 22: Performance Data

    5. PERFORMANCE DATA 5-1. Temperature Charts 5-1-1. Temperature Charts (CM1972) Outdoor Unit CM1972 Indoor Unit KMS0772 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type.
  • Page 23 Outdoor Unit CM1972 Indoor Unit KMS0972 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
  • Page 24 Outdoor Unit CM1972 Indoor Unit KMS1272 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
  • Page 25 Outdoor Unit CM1972 Indoor Unit KMS1872 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
  • Page 26 5-1-2. Temperature Charts (CM2472) Outdoor Unit CM2472 Indoor Unit KMS0772 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 27 Outdoor Unit CM2472 Indoor Unit KMS0972 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 28 Outdoor Unit CM2472 Indoor Unit KMS1272 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 29 Outdoor Unit CM2472 Indoor Unit KMS1872 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 30 Outdoor Unit CM2472 Indoor Unit KMS2472 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 31 5-1-3. Temperature Charts (CM3172) Outdoor Unit CM3172 Indoor Unit KMS0772 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 32 Outdoor Unit CM3172 Indoor Unit KMS0972 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 33 Outdoor Unit CM3172 Indoor Unit KMS1272 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 34 Outdoor Unit CM3172 Indoor Unit KMS1872 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...
  • Page 35 Outdoor Unit CM3172 Indoor Unit KMS2472 NOTE • This performance chart shows operation of a single wall-mounted indoor unit. The performance chart will vary depending on the indoor unit type. • Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value. (In this case, be sure to stop all the indoor units where performance is not being checked.) •...

  • Page 36: Cooling Capacity

    5-2. Cooling Capacity Outdoor Unit : CM1972 : KMS0972 Indoor Unit × Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: INDOOR ENT. TEMP. °F (°C) W.B. D.B. 72 (22.2) 76 (24.4) (15.0) 80 (26.7) 84 (28.9) 88 (31.1)
  • Page 37 Outdoor Unit : CM2472 : KMS0972 Indoor Unit × Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: INDOOR ENT. TEMP. °F (°C) W.B. D.B. 72 (22.2) 76 (24.4) (15.0) 80 (26.7) 84 (28.9) 88 (31.1) 72 (22.2) 76 (24.4) (17.2)
  • Page 38 Outdoor Unit : CM3172 : KMS0972 Indoor Unit × Power Supply : 230V Single Phase 60Hz < Cooling Capacity > RATING CAPACITY: INDOOR ENT. TEMP. °F (°C) W.B. D.B. 72 (22.2) 76 (24.4) (15.0) 80 (26.7) 84 (28.9) 88 (31.1) 72 (22.2) 76 (24.4) (17.2)

  • Page 39: Electrical Data

    6. ELECTRICAL DATA 6-1. Electric Wiring Diagrams Outdoor Unit CM1972 GRN/YEL GRN/YEL (2P)CONNECTOR THERMISTOR THERMISTOR THERMISTOR THERMISTOR THERMISTOR OUTDOOR THERMISTOR COIL COMPRESSOR To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts.
  • Page 40 Outdoor Unit CM2472 GRN/YEL GRN/YEL (2P)CONNECTOR THERMISTOR THERMISTOR THERMISTOR THERMISTOR THERMISTOR OUTDOOR THERMISTOR COIL COMPRESSOR To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts. SUPPLY UNIT POWER INDDOR INDDOR (7P)CONNECTOR COMP CORE FERRITE...
  • Page 41 Outdoor Unit CM3172 CORE FERRITE GRN/YEL GRN/YEL (2P)CONNECTOR THERMISTOR THERMISTOR THERMISTOR THERMISTOR THERMISTOR OUTDOOR THERMISTOR COIL COMPRESSOR To avoid electrical shock hazard, be sure to WARNING disconnect power before checking, servicing and/or cleaning any electrical parts. SUPPLY UNIT POWER INDDOR INDDOR (7P)CONNECTOR COMP...

  • 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 INITIAL Breaker is ON. The ON/OFF operation button on the remote controller is pressed.
  • Page 43 Control/conditions COOL The ON/OFF operation button on the remote controller is pressed. The outdoor unit starts. (Compressor and the outdoor fan start.) When the frequency reaches frequency increases are stopped for a period The frequency then increases. The room temperature The indoor temperature and the desired has reached the temperature are approximately equal.
  • Page 44 (1/f fluctuation fan) Control/conditions SENSOR The ON/OFF operation button on the remote controller is pressed. The room temperature reaches the desired temperature, and there is no need for further cooling. The room temperature is 59 °F or higher, and is slightly too cold.

  • 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 increase prohibit (16) Hz increase prohibit (15.6) (30) 7-2-2. Low Start Current Operation starts at (8 Hz), and the start current is less than the normal operating current.

  • 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 Monitor 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 • 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. 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.

  • 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. Problems Inspection points Self-Diagnostics check Indoor controller (control unit) Indoor fan motor Room temperature sensor Heat exchanger...
  • Page 51 Problems 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 Temperature changes This part is normal. Check elsewhere. Model No. Sequence CM1972 CM2472 CM3172 Check the resistance between the gray lead wire and the other wires. Resistance is OK if it is 46 + / – 4ohm at 68 °F...
  • 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

    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.

  • 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 Tools specifically for R410A Tools which can be com- monly used for R22, R407C, and R410A The above tools specifically for R410A must not be used for R22 and R407C. CAUTION Doing so will cause malfunction of the unit.

  • 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. 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...
  • Page 59 (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.

  • 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

    9-8. 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.

  • Page 62: Appendix Ainstallation Instructions

    APPENDIX A INSTALLATION INSTRUCTIONS CM1972 CM2472 CM3172 (II-852-6-4190-214-00-3)

  • Page 63: Installation Instructions

    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 A Division of SANYO North America Corporation Cornerstone Business Park, 1062 Thorndale Avenue, Bensenville, IL 60106, U.S.A.
  • Page 64 Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin alu- minum 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.
  • Page 65 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.

  • Page 66: Installation Site Selection

    WARNING and the possibility of fire, do not place obstacles, enclosures and grilles in front of or surrounding the air conditioner in a way that may block air flow. AVOID: direct sunlight. nearby heat sources that may affect performance of the unit.
  • Page 67 Max. Allowable Total Allowable Model Tubing Length per unit (ft.) CM1972/CLM1972 150 (L1+L2+L3) CM2472/CLM2472 150 (L1+L2+L3+L4) CM3172/CLM3172 150 (L1+L2+L3+L4) * 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 2-2. Connecting Indoor Units (1) Connecting indoor unit for CM1972/CLM1972 Outdoor unit 3/8"(9.52mm) 3/8"(9.52mm) 3/8"(9.52mm) Outdoor unit 3/8"(9.52mm) 3/8"(9.52mm) 3/8"(9.52mm) 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 (2) Connecting indoor unit for CM2472/CLM2472 Outdoor unit 3/8"(9.52mm)
  • Page 69 Outdoor unit 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 1/2"(12.70mm) 1/4"(6.35mm) Outdoor unit 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 1/2"(12.70mm) 1/4"(6.35mm) Flare 1/2"(12.70mm) Union 5/8"(15.88mm) (1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased Outdoor unit 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/2"(12.70mm) 1/4"(6.35mm) Flare 1/2"(12.70mm) Union 5/8"(15.88mm) (1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased...
  • Page 70 (3) Connecting indoor unit for CM3172/CLM3172 Outdoor unit 3/8"(9.52mm) 3/8"(9.52mm) 1/2"(12.70mm) 1/2"(12.70mm) Flare 1/2"(12.70mm) (1/2"(12.70mm) Outdoor unit 3/8"(9.52mm) 3/8"(9.52mm) 1/2"(12.70mm) 1/2"(12.70mm) Flare 1/2"(12.70mm) (1/2"(12.70mm Outdoor unit 3/8"(9.52mm) 3/8"(9.52mm) 1/2"(12.70mm) 1/2"(12.70mm) Indoor unit 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) Union 3/8"(9.52mm) 3/8"(9.52mm)) Supplied Reducer Fig.
  • Page 71 Outdoor unit 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 1/2"(12.70mm) 1/4"(6.35mm) 1/2"(12.70mm) 1/4"(6.35mm) Flare 1/2"(12.70mm) Union 5/8"(15.88mm) (1/2"(12.70mm) 5/8"(15.88mm)) Locally purchased Outdoor unit 3/8"(9.52mm) 1/4"(6.35mm) 3/8"(9.52mm) 1/4"(6.35mm) 1/2"(12.70mm) 1/4"(6.35mm) 1/2"(12.70mm) Flare 1/2"(12.70mm) Union 5/8"(15.88mm) (1/2"(12.70mm) Indoor unit 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 3/8"(9.52mm) (KMS0772,KMS0972,KMS1272) 5/8"(15.88mm) (KMS2472) Flare 1/2"(12.70mm)
  • Page 72 (Fig. 5f) This unit is designed so that the fan of the outdoor unit runs at low speed when the air conditioner is operated at low outdoor air temperatures. When the outdoor unit is exposed to strong wind, the system pressure drops because of the freeze protector.
  • Page 73 (1) Recommended dimensions of the baffle plates Air Intake Baffle 1/4" 6.5 mm) Fig. 5g For Air Intake Dimensions Model (inch) 25-3/16 25/32 1-31/32 CLM1972, CLM2472 (mm) (inch) 25-3/16 25/32 CLM3172 (mm) For Air Discharge Dimensions Model (inch) 22-1/16 23-1/32 13-25/32 5-29/32 19-9/32 1-3/8 CLM1972, 2472, 3172 (mm)
  • Page 74 (3) Installation procedure 1. Air Intake Baffle (1) Left side 1. Remove the top panel from the unit. 2. Remove the panel side L, and drill 3 holes of ø1/4 inch (6.5 mm) at the prescribed position. 3. Install the windbaffle on the unit using field supply bolts and nuts.
  • Page 75 2-5. Outer Dimensions of Outdoor Unit (1) CM1972/CLM1972 23-15/16 5-11/32 15/32 (2) CM2472/CLM2472 23-15/16 5-11/32 15/32 (3) CM3172/CLM3172 5-11/32 23-15/16 15/32 35-7/16 (900) 2-29/32 2-1/32 1-13/16 2-1/16 Fig. 6a 35-7/16 (900) 2-29/32 1-13/16 2-1/16 2-13/32 Fig. 6b 35-7/16 (900) 2-29/32...

  • Page 76: Diagram Of Outdoor Unit Installation

    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 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 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 it on the copper tube. (4) Make a flare at the end of copper tube with a flare tool.* (Figs.
  • Page 79 Be sure to match refrigerant CAUTION 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 IMPORTANT To prevent heat loss and wet floors due to dripping of con- densation, both tubes must be well insulated with a proper insulation material.

  • Page 80: Air Purging

    4. Air Purging Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. Therefore, they must be purged completely. pressure in the system rises operating current rises cooling efficiency drops moisture in the air may freeze and block capillary tubing water may lead to corrosion of parts in the refrigerant system...
  • 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 (12) Test run the air conditioner. (See page 25.) (13) While the air conditioner is running, apply liquid soap to check for any gas leaks around the service valves or caps. (14) If there is no leakage, stop the air conditioner.

  • Page 83: Wiring Instructions

    Refer to your local codes or in the absence of local codes see the National Electric Code: ANSI/NFPA70. Table 6 Max. Power Line Length (ft.) Model CM1972 / CLM1972 CM2472 / CLM2472 CM3172 / CLM3172 Max. Control Line Length (ft.) (B) (C)
  • Page 84 3'4" (1 m) from the power cable and wires between the indoor and outdoor units. Electrical noise may affect the operation. 5-3. Wiring System Diagram 3 indoor units with CM1972/CLM1972 Disconnect switch Field supply 230/208V...
  • 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 to the terminal”...
  • Page 86 5-5. Wiring Instructions for the Outdoor Unit CAUTION Be sure to correctly align inter-unit cables A, B, C and D. Indoor unit A A is the indoor unit with Terminal board refrigerant tubing that is 1 2 3 connected to service valve Inter-unit cables A (top) of the outdoor unit.
  • Page 87 Regulations on wire size differ from locality to locality. For 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

    If operated with only a single unit installed, the returning fluid to the compressor may cause a malfunction. > List of Combination Tables Model No. of Outdoor Unit CM1972 CM2472 CM3172 Remarks OI-852-6-4180-818-00-4 OI-852-6-4180-819-00-4...
  • Page 90 Example: When 3 indoor units are connected at 230V If the following holds true Rated cooling capacity of CM1972 outdoor unit: C=19700 (BTU/h) Rated cooling capacity of indoor units: K1, K2, ... (BTU/h) Then: C x 2 (200%) K1 + K2 + ...
  • Page 91 < Combinations of operatable indoor units > CM1972 (Rated cooling capacity at 230V: 19700 BTU/h) Table 1 Indoor Unit Combination 7500 Single-room 9000 Operation 11900 17500 7500 + 7500 7500 + 9000 7500 + 11900 7500 + 17500 2-room 9000 +...
  • Page 92 CM1972 (Rated cooling capacity at 208V: 19700 BTU/h) Table 2 Indoor Unit Combination 7500 Single-room 9000 Operation 11900 17500 7500 + 7500 7500 + 9000 7500 + 11900 7500 + 17500 2-room 9000 + 9000 Operation 9000 + 11900 9000 +...
  • Page 93 In this case, all the indoor units installed must not be operated concurrently under any CAUTION circumstances. Otherwise, the air conditioner may not run properly and trouble may occur. Example: When 4 indoor units are connected...
  • Page 94 This multi outdoor unit allows up to four indoor units to be connected. However, all four indoor units must not be operated concurrently. Otherwise, the air conditioner may not run properly. Up to three indoor units may be operated concurrently.
  • Page 95 This multi outdoor unit allows up to four indoor units to be connected. However, all four indoor units must not be operated concurrently. Otherwise, the air conditioner may not run properly. Up to three indoor units may be operated concurrently.
  • Page 96 In this case, all the indoor units installed must not be operated concurrently under any CAUTION circumstances. Otherwise, the air conditioner may not run properly and trouble may occur. Example: When 4 indoor units are connected...
  • Page 97 < Combinations of operatable indoor units > CM3172 (Rated cooling capacity at 230V: 30600 BTU/h) Table 1 7500 9000 Single-room 11900 Operation 17500 24200 7500 7500 7500 + 11900 7500 + 17500 7500 + 24200 9000 2-room 9000 + 11900 Operation 9000 + 17500...
  • Page 98 CM3172 (Rated cooling capacity at 208V: 28600 BTU/h) Table 2 7500 9000 Single-room 11900 Operation 17500 24200 7500 7500 7500 9000 7500 + 11900 7500 + 17500 7500 + 24200 9000 9000 2-room 9000 + 11900 Operation 9000 + 17500 9000 + 24200 11900 + 11900...
  • 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)

This manual is also suitable for:

Cm2472Cm3172Cmh3172 - 30,600 btu ductless multi-split air cond/heat pumpClm1972Clm2472Clm3172

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