Haier HC18D1VAR Service Manual
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Haier HC18D1VAR Service Manual

Central air conditioning
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Central Air Conditioning

SERVICE MANUAL

Features
High efficiency design
Benchmark hermetic compressor design
Haier Hi-Efficiency aluminium fin and copper tube design
Compact design of outdoor unit
Manufactured for convenient installation and maintenance
Cooling only ,13SEER
Powder coated full metal jacket
Manual code: SYJS----AM-----004-05---Rev.6
Models
HC18D1VAR HC24D1VAR
HC30D1VAR HC36D1VAR
HC42D1VAR HC48D1VAR
HC60D1VAR
Part Number:
AC-8888-129
Edition: 2006-11-20
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Summary of Contents for Haier HC18D1VAR

  • Page 1: Service Manual

    Part Number: AC-8888-129 Features High efficiency design Benchmark hermetic compressor design Haier Hi-Efficiency aluminium fin and copper tube design Compact design of outdoor unit Manufactured for convenient installation and maintenance Cooling only ,13SEER Powder coated full metal jacket Manual code: SYJS----AM-----004-05---Rev.6...

  • Page 2: Table Of Contents

    Model: Cooling Only, 13SEER units Central Air Conditioner CONTENTS 1. DESCRIPTION OF PRODUCTS & FEATURES……………………...3 2. PHYSICAL AND ELECTRICAL SPECIFICATIONS………………..5 3. SAFETY PRECAUTION…………………………………………….…...8 4. SYSTEM COMPONENTS AND FUNCTIONS ………………………..8 5. ELECTRICAL CONTROL DEVICES…………………………….……..10 6. APPLICATION…………………..……………………………………..…11 7. INSTALLATION INSTRUCTIONS………………………..…………...13 8. MAINTENANCE INSTRUCTIONS………………………………..…….21 9.

  • Page 3: Description Of Products & Features

    1.2 NOMENCLATURE FOR MODEL NUMBER Model number explanation---indoor unit Nominal Electric Electric Design Airflow Unit Efficiency Haier Blower unit capacity in Continuation heater Designation code series configuration Width(in.) (1000) Btu/h Y:575V-3Ph-60Hz;...
  • Page 4 Model: Cooling Only, 13SEER units Central Air Conditioner CABINETS: Constructed of powder painted galvanized steel to provide a durable finish and protection for the outdoor coil. Fig.1-1 FAN GUARD AND MOTOR BRACKET: Welded powder coated guard with independent rod and band motor bracket, unit top has a deep draw fan venturi for efficient air flow.

  • Page 8: Safety Precaution

    Model: Cooling Only, 13SEER units Central Air Conditioner 3. SAFETY PRECAUTIONS CAUTION : please read all instructions prior to installing, operating, maintaining or repairing the product. WARNING: THE MANUFACTURER’S WARRANTY DOES NOT COVER DAMAGE TO CAUSED BY THE USE OF ANSUTHORIZED COMPONENTS OR ACCESSORIES, THE USE OF SUCH UNAUTHORIZED COMPONENTS OR ACCESSORIES MAY ENDANGER LIFE AND PROPERTY.
  • Page 9 Model: Cooling Only, 13SEER units Central Air Conditioner Both compressor types are protected internally against over-current and over-temperature conditions. Some scroll compressors have an additional thermostat mounted externally in series electrically with the contactor coil. FAN AND BLOWER MOTORS (Fig. 4-2 and Fig. 4-3) The outdoor component of split system contains an fan motor.

  • Page 10: Electrical Control Devices

    Model: Cooling Only, 13SEER units Central Air Conditioner REFRIGERANT CIRCUIT (Fig. 4-5) All 13SEER units outdoor coils are multi-circuit. Refrigerent gas or liquid is uniformly distributed to from 4 to 10 circuits to improve heat transfer and reduce capacity losses due to pressure drops. Fig.4-5 5.ELECTRICAL CONTROL DEVICES THERMOSTATS...

  • Page 11: Application

    Model: Cooling Only, 13SEER units Central Air Conditioner Compressor delay PCB Fig.5-1 START KITS(OPTIONAL) This special relay uses the EMF generated by the compressor start windings to take a start capacitor out of the circuit. The relay and its companion capacitor can start the compressor at low voltages and against higher pressure, such as those caused by non-bleed port expansion valves.

  • Page 12: Unit Dimensions

    30 5/8" 30 5/8" 30 5/8" 32 1/5" 28 1/4" 32 3/16" 32 3/16" 32 3/16" 36 1/8" 40" Table 6-1 iston sizes and indoor fan speed: HC18D1VAR HB2400VD1M20 HB2400VD1V20 0.073 HC24D1VAR HB2400VD2M20 HB2400VD2V20 0.073 0.0 78 HC30D1VAR HB3600VD1M22 HB3600VD1V22 0.0 91...

  • Page 13: Installation Instructions

    Model: Cooling Only, 13SEER units Central Air Conditioner Air leakage of only 3% in a return duct can cause a 5% loss in system capacity. 3% leakage on a three ton system is only 30 CFM. Two or three unsealed joints can cause a leak of this size. Sealing the return and supply ducts result in full system capacity and lower operating costs.
  • Page 14 Model: Cooling Only, 13SEER units Central Air Conditioner If the unit is to be installed in an area where contaminants are likely to be a problem, special attention should be given to the equipment location and exposure. Avoid having lawn sprinkler heads spray directly on the unit cabinet. In coastal areas, locate the unit on the side of the building away from the waterfront.

  • Page 15: Unit Clearances

    Model: Cooling Only, 13SEER units Central Air Conditioner 7.4.UNIT CLEARANCES Fig. 7--1 The minimum clearances for the unit are shown in Fig. 8--1. Condenser air enters from all (4) sides. Air discharges upward from the top of the unit. Refrigerant line and electrical connections are made from the service access area.

  • Page 16: Line Insulation

    Model: Cooling Only, 13SEER units Central Air Conditioner Figure C Fi g . 7-2 Only refrigeration-grade copper piping (dehydrated and sealed) should be used. Take extreme care to keep the refrigerant tubing clean and dry prior to and during installation. If there is any doubt on the cleaness of the piping, blow out the line with dry nitrogen to remove any chips or debris before connection are made.
  • Page 17 Model: Cooling Only, 13SEER units Central Air Conditioner Refrigerant Line Sizing Refrigerant Line Length (Ft) Unit Size 0 – 24 25 – 49 50 – 74 (Ton) Line Outside Diameter (In) Suction Liquid Suction Liquid Suction Liquid 11/8 11/8 11/8 11/8 11/8 11/8...

  • Page 18: Charging The System

    Model: Cooling Only, 13SEER units Central Air Conditioner 8.Pressurize the lines to 150 psi maximum with dry nitrogen. Check for leaks at all joints with liquid detergent. If a leak is found, repair it after removing the nitrogen. Repeat the process and re-check. 9.Do not purge the lines with refrigerant.
  • Page 19 Model: Cooling Only, 13SEER units Central Air Conditioner System Superheat Ambient Return Air Temperature ( ) Temperature At Condenser Inlet Table 7-2:System charging table by superheat 7.8 ELECTRICAL WIRING ! WARNING A means of strain relief must be installed to this appliance at the electrical service entrance. The interconnecting wires between indoor and outdoor units must be in accordance with the national electric code and all code regulations.

  • Page 20: System Startup

    Model: Cooling Only, 13SEER units Central Air Conditioner Copper Wire Size - AWG (1% Voltage Drop) Supply Circuit Supply Wire Length - Ft Ampacity Table7-3: Minimum Wire Size Based on N.E.C. for 60 C Type Copper Conductors Below 100 Ampacity. The installer must be familiar with the location of the over-current protection, properly size for this this application and the proper procedure for disconnecting power service to the unit.

  • Page 21: Maintenance Instructions

    Model: Cooling Only, 13SEER units Central Air Conditioner refrigerant liquid line. 5. At the end of the liquid line, the refrigerant passes through a fixed metering device, reducing pressure and temperature . The liquid, under reduced pressure, then enters the indoor coil surface it expands and absorbs heat from the indoor air passing over the finned surface.

  • Page 22: Service And Troubleshooting

    Model: Cooling Only, 13SEER units Central Air Conditioner NEVER USE A WEATHER COVER OVER THE OUTDOOR UNIT. The unit is designed to operate outdoors. A cover traps moisture in the unit causing rust and corrosion .There is the added danger of starting the system with the cover on.
  • Page 23 Model: Cooling Only, 13SEER units Central Air Conditioner 6. An electronic leak detector or bottle of soap suds. 7. A micron meter (not shown) 8. A vacuum pump capable of pulling to 1000 microns; 9. Refrigerant recovery /recycling equipment vacuum pump Fig.9-1 Before beginning any troubleshooting procedure, complete the following installation checklist.
  • Page 24 Model: Cooling Only, 13SEER units Central Air Conditioner …………. No evidence of refrigerant leaks …………. Condensate line piped with trap and vent …………..Horizontal drain pan installed in horizontal applications …………. Auxiliary drain pan installed in horizontal applications …………. Auxiliary condensate line installed in horizontal application CAPACITOR ELECTRICAL CHECK WARNING: ANY CAPACITOR SHOWING SIGNS OF LEAKAGE OR BULDGING MUST BE REPLACED IMMEDIATEDLY.
  • Page 25 Model: Cooling Only, 13SEER units Central Air Conditioner Indicator Fig. 9-3 ELECTRICAL CHECK TO TEST FAN MOTOR: 1. Be sure power is off to the motor. 2. Disconnect the motor wires. 3. Place one ohmmeter lead on common and the other on start .The meter should show continuity. 4.
  • Page 26 Model: Cooling Only, 13SEER units Central Air Conditioner will reveal this problem. With sealed relays, use an ohmmeter to test for open or closed contacts. Fig. 9-5 ELECTRICAL CHECKS 1. BE SURE ALL THE ELECTRICAL POWER IS OFF TO THE COMPONENT BEING CHECKED.
  • Page 27 Model: Cooling Only, 13SEER units Central Air Conditioner COMPRESSOR ELECTRICAL CHECKS Single-phase compressors use permanent split capacitor motors. There are two windings that connect at a common point at the “common” wiring terminal. The two windings are called “start” and "run". The start winding has the higher resistance and is connected in series with the capacitor.
  • Page 28 Model: Cooling Only, 13SEER units Central Air Conditioner OPEN COMPRESSOR START WINDING---REPLACE THE COMPRESSOR . 7.The resistance from one winding terminal to any other terminal should be the same with three phase compressors. NOTE: on larger 208/230 volt compressors the ohm values could be as low as 0.10 ohms, THIS IS NOT A SHORTED WINDING .A winding is open if resistance measured is infinite( ).
  • Page 29 Model: Cooling Only, 13SEER units Central Air Conditioner entering and leaving air temperature with accurate thermometers. Run the condensing fan until the leaving air temperature equals to the entering air temperature. This is now the refrigerant temperature . Compare the observed refrigerant pressure shown on the high pressure gauge to its associated pressure on a temperature –pressure conversion chart.

  • Page 30: Troubleshooting Guide

    Model: Cooling Only, 13SEER units Central Air Conditioner Warnings: TACK APPROPRIATE STEPS TO KEEP CONTAMINATIONS OUT OF THE LINES, WHILE THESE LINE ARE OPEN TO ATMOSPHERE. USE A OFMINIMUM 5% SILVER FOR COPPER TO COPPER CONNECTIONS. USE A OF MINIMUM 35% SILVER FOR COPPER TO STEEL CONNECTIONS. WHEN BRAZING, PURGE DRY NITROGEN THROUGH THE LINES TO PREVENT THE FORMATION OF OXIDES.
  • Page 31 Model: Cooling Only, 13SEER units Central Air Conditioner furnace trap operation of condensate pump. Condenser fan and AC Contact not connected to the Re-connect the power supply wire, and compressor don’t run power supply wire or not tightly fasten tightly fasten. The outdoor power supply main circuit Reset the power supply switch to "...

  • Page 32: Wiring Diagrams

    10. WIRING DIAGRAM Note: The diagram wiring of the fan motor may be have some difference from the real parts due to different types of fan motor ,the detailed information can refer to the fan motor nameplate. Wiring diagram-Outdoor Unit (HC18D1VAR—HC60D1VAR)

This manual is also suitable for:

Hc24d1varHc36d1varHc30d1varHc42d1varHc48d1varHc60d1var

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