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COMMERCIAL AIR CONDITIONER Service Manual

1. 60 17 25 30 33 37 65 13 19 26 32 35 70 5 14 20 28 32 75 5 10 17 25 29 80 5 12 21 26 85 5 10 17 20 90 7 12 18 95 5 5 5 100 5 5 Table 8 2 System charging table by superheat 8 8 ELECTRICAL WIRING WARNING A means of strain relief must be installed to this appliance at the electrical service entrance Make sure that interconnecting wires between indoor and outdoor units meet the standards codes and regulations Incomplete connection or fixing of the wire could result in a fire A means of strain relief must be installed to this appliance at the electrical service entrance Do not use intermediate connection of the power cord or the extension cord and do not connect many devices to one AC outlet It could cause a fire an electric shock due to defective contact defective insulation exceeding the permissible current etc Perform electrical work according to the installation manual and be sure to use an exclusive circuit If the capacity of the power circuit is insufficient or there is incomplete electrical work it could result in a fire or an electric shock Ground the unit Do not connect the ground to a gas pipe water pipe lighting rod or telephone ground Defective grounding could cause an electric shock Electrical installation will consists of power supply wiring to the condensing unit and control wiring between thermostat indoor unit and the condensing unit All wiring must be in accordance
2. BRK L1 OFM 6 FLBK RD LA 2 Ne Me Meo BR FLBK USE COPPER CONDUCTORS ONLY WARNING CABINET MUST BE PERMANENTLY GROUNDED AND ALL WIRING TO CONFORM TO L E C N E C C E C C L C AND LOCAL CODES AS APPLICABLE REPLACEMENT WIRE MUST BE THE SAME GAGE AND INSULATION AS ORIGINAL WIRE COMPONENT CODES BCR BLOWER CONTROL RELAY BCAP RUN CAPACITOR BLOWER MOTOR CC COMPRESSOR CONTACTOR CRANKCASE HEATER OPTIONAL 15 6 CHS CRANKCASE HEATER SWITCH OPTIONAL RD BL BR CMPR COMPRESSOR DFC DEFROST CONTROL BOARD HPS HIGH PRESSURE SWITCH LPS LOW PRESSURE SWITCH IBM INDOOR BLOWER MOTOR Ds ODS OUTDOOR TEMPERATURE SENSOR cri BR BL OFM OUTDOOR FAN MOTOR RCAP RUN CAPACITOR COMPRESSOR RVS REVERSING VALVE SOLENOID 3 pen STCAP START CAPACITOR OPTIONAL ex TRAN STRLY START RELAY OPTIONAL 220 1 STRTH START THERMISTOR OPTIONAL L1 TRAN TRANSFORMER 230 208 SELECTABLE BK 208 COLOR CODES BK BLACK BL BLUE BR BROWN GR GREEN L2 PU PURPLE RD RED WH WHITE YL YELLOW o BK PU CCH RD STCAP 208 230V 60Hz 1PH L1 BK Li BK T N R GND BCR NC J NO j COM PU 1208 2300 60 2 1PH PU PU PIPE SENSER m a m
3. gt VENT SENSER CN5 5 vsivs F CN7 RVS 20 4 BK V n gt lt zo o 12 WH RD i LPS GY GRAY OR ORANGE VI VIOLET COM BL RD i HPS RD JCN2 i LINCI Vims BL RD BL BL RD BL YL OR WH GY HA e ARAN o 8 AAA TS RHS 1 AUTO ON REVERSING VALUE FAN 5 5 COMPRESSOR RESISTANCE HEAT CONTROL INDOOR FAN CONTROL OUTDOOR TEMPERATURE 24VAC POWER ODA 8 r 24VAC COMMON Li 1 10SEER 10SEER 12SEER 12SEER 13SEER 13SEER LED Flash Codes LED illuminates during unit operation only Dip 1 Dip2 Dip3 Dip4 loopCTtwice loop once loop CT twice loop CT once loop CT twice loop CT once continuous on 24VAC supplied to Y terminal of defrost control Flash on off System in defrost operation 1 2 1 2 1 flash Pipe coil sensor open or short circuit OFF OFF OFF OFF HR36A1VAR HR18C1VAR HR42C1VAR HR18D1VAR HR42D1VAR OFF OFF OFF OFF OFF OFF OFF ON ON ON OFF ON HR18A1VAR HR24A1VAR HR30A1VAR HR42A1VAR HR48A1VAR HR60A1VAR HR24C1VAR HR30C1VAR HR36C1VAR HR48C1VAR HR60C1VAR HR24D1VAR HR30
4. 7 Dra Elevelep Drawn Elevabo Drawn Eleva fep Drawn Elevalep Drawn Elev alep Drawn Elev afep Drawn cree pan OO Acorn Acorn cary Acorn Aone cee Body style Coil guard _____ Ophona Oplona __ optional optional Optona Optiona Optional e ve ve ove ve ve ve o vs ves ve Features Sea cant ___ ve ve ve ve ve ve ve ColDesgn 7 Haier Enhanced ier Enhanced Gibier Enhanced Cier Enhanced Enhanced Cipier Enhanced Cier Enhanced Cc ve ve ve ve ve ve ve Removable Top Grit Assembly Jo So ves Yes Ye Ye EevateaBasepan ves Ye Ye Ye Ye Ye righ and Low Pressure Sea ona Haier Commercial Air Conditioner Model heat pump 10SEER UNITS sum Sumo Standard sum Fu Sericevawes w ve ve ve ve ve ve Easy Sawvice access ve ve ve ve ve ve ve Corrosion Resistant Outside ves ve ve ve ve ve ves Accessories Room memes We No wo w No wo w san asset __ _ No wo wo No wo w Lou amont ka Opens mens Ope
5. 30 1 4 770 30 1 4 770 H 27 3 A 702 273 4 702 31 11218021 31 1 2 802 31 1 2 798 31 1 2 798 35 1 2 898 Designates Metric Conversions Table 6 1 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS o piston sizes Note the piston placed in the outdoor unit packaging box is used for indoor unit when cooling Piston Piston Size ize placed Outdeenunt Indoor coil model Installed in Uis outdoor bag HR18A1VAR HB2400VA1M20 0 059 0 074 HR24 A1VAR HB2400VC1M20 0 068 0 078 HR30 HB3600VA1M20 0 068 0 078 HR36A1VAR HB3600VC1M25 0 074 0 081 HR42A1VAR HB4200VA1M25 0 078 0 091 HR48A1VAR HB4800VA1M25 0 081 0 097 HR60A1VAR HB6000VA1M25 0 081 0 099 Table 6 2 Piston size The air distribution system has the greatest effect The duct system is totally in the control of the contractor The industry can only recommend the correct procedure The correct air quantity is critical on air conditioning system Proper operation efficiency compressor life and humidity control depend on the correct balance between indoor load and outdoor unit capacity High indoor air flow increases the possibility of high humidity problems in cooling Low indoor air flow reduces total capacity and causes coil icing Serious harm can be done to the compressor in either condition Air conditioning requires a specified air flow Each ton of air conditioning requires 400 cubic feet
6. 3 SHUT OFF THE COMPRESSOR WHEN THE SUCTION PRESSURE DROPS TO 3 5 PSI POSITIVE PRESSURE DO NOT OPERATE THE COMPRESSOR WITH A NEGATIVE SUCTION PRESSURE 4 Observe the suction pressure on the compound gauge 38 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS o A suction pressure holds normal condition B Suction pressure rises to a point and stops Some refrigerant finally evaporated in the coil and made its pressure felt on the gauge Normal condition Do not start the compressor to force this little refrigerant into the condenser C Suction pressure rises and eventually equalizes with the high pressure Abnormal condition Refrigerant is leaking from the condenser coil Causes Leaking liquid line valve leaking discharge check valve scroll compressors only leaking compressor valves ACTION Determine the causes and correct it D Suction pressure Never drops to 3 5 PSI Abnormal condition Refrigerant is leaking from the condenser coil Causes Leaking liquid line valve leaking discharge check valve scroll compressors only leaking compressor valves ACTION Determine the causes and correct it REFRIGERANT NONCONDENSIBILES CHECK This procedure checks the quality of the refrigerant by comparing the refrigerant pressure to its temperature The test tells if there are contaminating non condensable gases in the refrigerant usually air and moisture or if the proper refrigerant is
7. Some compressor require the assistance of an additional potential relay start The potential relay connect to the contactor The potential use two terminals 5 and 2 The relay coil that opens them is between terminal 2 and 5 START KIT ELECTRICAL CHECKS WARNING DISCONNECT ALL POWER TO THE OUTDOOR UNIT BEFORE BEGINNING THIS TEST MOTORS ELECTRICAL The motors in both the outdoor unit and indoor unit are similar Outdoor motors have one speed while indoor unit usually are multi speed All fan motors require a capacitor for the best torque and efficiency If the motor is replaced replace the capacitor The fan motor has both Run and Start windings Extended run windings furnish a choice of speeds with indoor products Use an Ohmmeter to troubleshooting motors Indicator Fig 10 3 ELECTRICAL CHECKS 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 Place one ohmmeter lead on common and the other on run The meter should show continuity with less resistance 5 Leave one meter lead on common and touch each remaining lead Each should indicate continuity 6 Ifa winding does not show continuity the motor has failed and must be replaced 7 Ifthe motor needs replacing replace the capacitor as well MECHANICAL Fan motors can suffer a bearing loss due to a lack of lubrication This may be caused by excessi
8. a secondary drain pan must be provided by the installer and placed under the entire unit with a separate drain line properly sloped and terminated in an area visible to the user 9 Before setting up flowrator assembly for field brazing see page 12 or read the Warning label on the lower access panel 10 Failure to follow this installation requirements will cancel product warranty Air flow Secondary Knockout Primary Knockout 27 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS H SIDE OF UNIT DOWNFLOW INSTRUCTIONS AIR HANDLER UNIT Important Read instructions below carefully 1 Before putting the Air Handler in the downflow position remove the three access panels and remove the metal coil retaining bracket and filter close off CHANNELL BRACKET ZEECOIL SUPPORT BRACKET Then remove the horizontal and vertical drain pans The horizontal pan is not required for downfolw COIL application RETAINING 2 After removing the coil turn the Air Handler to the BRACKET downflow position and relocate the 8 brackets NOTE THE FIL TER PROVISION IS NOT APPLICABLE IN THIS which include 1 tie bracket 1 rear channel bracket DOWNFLOW APPLICATION 2 zee coil supports 2 stiffener brackets and 2 3 2 Fig 1 flat insulation retaining brackets In effect brackets coil and 2 lower access panels will be assemble
9. n H 17SEER A 115V 1 Ph 60Hz 185 Table 1 1 1 3 ENGINEERING FEATURES COPPER TUBE ALUMINUM FIN COILS Both indoor and outdoor coils are designed to optimize heat transfer minimize size and cost and increase durability and reliability Haier Commercial Air Conditioner Model heat pump 10SEER UNITS H CABINETS Constructed of powder painted galvanized steel providing protection to the outdoor unit and a durable finish SERVICE VALVES Facilitates unit servicing and provides a reliable and safe access to measure unit pressures Fig 1 3 FLOWCHECK DISTRIBUTORS Outdoor units use the Flowcheck Distributor to act as an open check valve in the cooling mode BASE PAN This deep drawn and sturdy base keeps the bottom of the coil out of harms way The base has weep holes to allow the water from rain to flow away from the unit Fig 1 4 ACCESSORIES LOW AMBIENT CONTROL This allows low temperature operation in the cooling cycle down to 0 F outdoor temperature This control should be installed in units that operate in cooling outdoor ambient temperatures below 65 F and is recommended for all commercial applications START COMPONENTS Offer additional starting torque covering a wide range of voltage and pressure variations Usually required on reciprocating compressors with flowcheck piston metering Haier Commercial Air Conditioner Model heat pu
10. position PROTECTION DEVICES Protection for the unit begins with the installation of appropriate fuses or circuit breakers by the installing contractor Breaker or fuse size is governed by local codes and the National Electrical Code Current requirements for each unit are found in the unit specifications OVERLOADS AND LIMITS Overloads protect against over current or over temperature conditions Those located in the outdoor unit include the automatic reset internal overload in the fan motor and the compressor automatic reset internal overload Such controls are not serviceable but their operation may influence service troubleshooting For example the compressor internal overload may stay open for several hours A technician may incorrectly diagnose an open compressor winding There are similar overloads in the indoor air handling portion with the electric resistance heaters The indoor blower motor has an internal overload The electric elements use two types of protectors both replaceable Some electric heat section use fusible links They are a one time over temperature protector and must be replaced upon opening Limit controls are thermal discs that automatically reset Normally limit open and stop a heat rise before the fusible links open NOTE Never disconnect or wire around a safety device First determine why it opened then replace it with a properly rated part HIGH PRESSURE CUT OUT SWITCH optional The high pressure cut out is a p
11. 54 em 2 54 em 27 9 em 2 54 em PLASTIC BREAKER COVER SUCTION LINE PRIMARY amp SECONDARY CONDENSATE DRAINS HORIZONTAL 3 4 NPT LIQUID LINE 2 00 5 08 em TYPICAL 21375 12 7 em 1 1 188 6 03 em 2 54 INLET 3 02 em RIGHT SIDE VIEW H INLET FRONT VIEW 1 188 3 02 em 1 188 3 02 em PRIMARY amp SECONDARY CONDENSATE DRAINS UPFLOW 3 4 NPT FEMALE 118 7em 55 9cm 44 5em 50 0em 25 4m 36 8cm 30 3em 43 5em 50 3em 8 57em Fig 8 3 23 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS 0 83 2 12 em 0 83 i25 0 83 2 12 31 2 12 5 12 13 em PRIMARY amp SECONDARY CONDENSATE DRAINS HORIZONTAL 3 4 NPT 200 SUCTION LINE 2 00 2 00 508cm 15 08 em TYPICAL LIQUID LINE 5 00 J 2375 12 7 cm 1 J 1 188 6 03 cm 2 54 cm INLET 3 02 cm 1 188 1 188 RIGHT SIDE VIEW 3 02 cm INLET 3 02 cm FRONT VIEW PRIMARY amp SECONDARY CONDENSATE DRAINS UPFLOW 3 4 NPT FEMALE E T aie am Jea JBE 3 56 9 05cm AS 2 222 19 86 135 5em 56 lcm 59 8cm 64 0cm 23cm 212cm 14 77cm 57 5cm 50 4cm D HB42 I 1M25 1M25 3 56 9 05cm EUN d FIM 19 86 151cm 56 lem 59 8 64 0cm 23cm 212 14
12. 7cm 57 5cm 50 4cm 24 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS Before installing this appliance insure that it is properly sized and adequate power is available This appliance can be installed in the vertical or right horizontal position without modification The horizontal left and downflow positions require product modification This product is designed for zero inch 0 clearance however adequate access for service or replacement must be considered without removing permanent structure This unit can be installed on a platform when deemed necessary In an attic installation a secondary drain pan must be provided by the installer and placed under the entire unit with a separate drain line properly sloped and terminated in an area visible to the owner This secondary drain pan is required in the event that there is a leak or main drain blockage Closed cell insulation should be applied to the drain lines in unconditioned spaces where sweating may occur Appliances installed in garages warehouses or other areas where they may be subjected to mechanical damage must be suitably guarded against such damage by installing behind protective barriers being elevated or located out of the normal path of vehicles When installed on a base the base must also be protected by similar means Heating and cooling equipment located in garages which may generate a glow spark or flame capable of igniting flammable vapors m
13. Flow dry nitrogen into the shutoff valve port and through the tubing while brazing 7 After brazing quench with a wet rag to cool the joint Reinstall the Schrader core in the valve if removed for brazing 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 Evacuate the lines and indoor coil Evacuation All new installations must be evacuated to a deep vacuum in order that all noncondensible gases and moisture are removed prior to charging the system Air in a system causes high condensing pressure which increases power consumption and reduces performance The presence of moisture in a system can render it inoperable in a very short time Proper evacuation assures a dry uncontaminated system Here is the recommended evacuation procedure 1 Connect vacuum pump to both liquid and suction valve service ports 2 Evacuate the interconnecting tubing and indoor coil to 500 microns or less for a minimum of 30 minutes Close the valve to the vacuum pump and wait 15 minutes Vacuum should not rise above 800 microns If unable to obtain 500 microns or vacuum rises above 800 microns over 15 minutes period discontinue evacuation pressurize and check for leaks Repair any leaks found and repeat the step 2 3 Close valve to the vacuum pump and stop pump 4 Wh
14. is now a cool vapor 7 The cool refrigerant vapor travels through the larger insulated vapor line to the accumulator 8 The accumulator separator separates any liquid refrigerant and holds it Only vapor refrigerant and refrigerant oil leave the accumulator The oil is drawn out through a special port inside the accumulator 9 Refrigerant vapor flows through the suction line to the intake of the compressor The cycle then repeats Electrical The operation cycle as follows 1 The thermostat calls for cooling 2 This sends a 24 voltage signal through the Y terminal to the compressor start kit after 3 minutes the compressor contactor in the outdoor unit are closed The compressor and outdoor fan start At the same time 24 Voltage signal flows through the Terminal to the indoor blower relay indoor blower starts the cooling system is now in operation The thermostat satisfies and ends the call for cooling This ends the 24 Voltage signal to the compressor start kit and the outdoor unit stops This ends the 24 voltage signal to the indoor blower relay and this indoor blower strips The system is now off gt 9 INSTRUCTIONS FILTERS WARNING DISCONNECT MAIN ELECTRICAL POWER TO THE UNIT BEFORE ATTEMPTING ANY MAINTENANCE 1 Keep the air filters clean A new home may require more frequent filter attention until dust from the construction is removed 2 Replace gl
15. motor This blower motor is a PSC motor and usually has more than one fan speed Fan and motor assembly Fig4 3 METERING DEVICES Flow Check Pistons One air conditioning metering device is the flow check piston It has two functions First it acts as a refrigerant metering device controlling refrigerant flow into the evaporator Second it acts as an open check valve when refrigerant flows in the opposite direction When refrigerant enters the device from the nut end the piston seats and forces all refrigerant through the center of the piston It functions as a metering device controlling the amount of refrigerant flow With flow in the opposite direction pressure moves the piston off the seat and liquid refrigerant flows around the piston PROPER MATCH OF UNIT AND PISTON SIZES Split air conditioning indoor and outdoor units must be properly matched in accordance with the manufacturer s specification sheets and installation manuals Combinations for indoor and outdoor units using a distributor and flowcheck are shown in the application table 6 2 Using too small a piston starves the coils of refrigerant A piston that is too large floods coils Mismatching indoor and outdoor units of split systems affects performance efficiency charging and reliability Haier Commercial Air Conditioner Model heat pump 10SEER UNITS H Distributor assy Fig 4 4 REFRIGERANT CIRCUIT There are two types of
16. must come sealed from the factory Ensure that it is correct replacement compressor of the same size and electrical characteristics as the original D Place the new compressor in the unit and install the mounting bolts E Remove the caps from the compressor stubs clean the lines and stubs and braze joints together Warnings 1 KEEP CONTAMINATIONS OUT OF THE LINES 2 USE MINIMUM 5 SILVER FOR COPPER TO COPPER CONNECTIONS USE MINIMUM 35 SILVER FOR COPPER TO STEEL CONNECTIONS 3 PURGE DRY NITROGEN THROUGH THE LINES TO PREVENT OXIDATION F Inspect all other components such as check valve and electrical components for copper operation Replace any if necessary G After all connections are made all valves pressurize to 150 psi with dry nitrogen and leak test with liquid detergent If a leak is found repair it after removing the nitrogen recheck H After leak testing recover any test refrigerant Triple evacuate the system Evacuate through both high and low sides of the system Evacuate to 1500 microns twice and 500 microns the last time Haier Commercial Air Conditioner Model heat pump 10SEER UNITS Break each vacuum with dry nitrogen to 3 0 psi Use the largest connections and hoses possible to expedite the process J Charge with clean new or reclaimed R 22 refrigerant Charge in accordance with proper charging procedures Check change as needed after 24 hours of run time to
17. refrigerant charge Charge correctly per instruction Air non condensable or moisture in Recover refrigerant evacuate amp recharge System add filter drier Incorrect voltage At compressor terminals voltage must be within 1096 of rating plate volts when unit is running Water on floor or in Blocked condensate drain and P Remove blockage furnace trap Condenser and AC Contact not connect to the power Re connect the power supply wire compressor don t run supply wire not tightly fasten tightly fasten The outdoor power supply main circuit Dial the power supply switch to Switch locate OFF position or fuse position or change the fuse and make sure failure of main circuit the main touch point of AC Contactor have current go through Check if the relay P2 of 3 minute timer board have current output if not check if P1 have 24 V AC input if have 24V AC please check if it keep for 3 minutes if so and P2 no output change the 3 minute timer board if keep time 3 minutes P2 no output if P1 no24V AC first check the thermostat C Y terminal have 24 V AC if no 24 V AC then check the thermostat or reset the setting temp if have 24 V AC check if the C Y and P1 connection wire cut off or fasten loosely if cut off then change the parts The control coil of AC Contactor no 24 V AC power 41 Haier Commercial Air Conditioner Condenser fan r
18. system charge normal vapor Condenser fan not running Repair or replace pressures Air non condensibles or moisture in Recover refrigerant evacuate amp recharge system add filter drier Low head High Flowcheck piston size too large Change to correct size piston vapor pressures Defective compressor valves Replace compressor Incorrect capillary tubes Replace coil assembly Low vapor cool compressor iced evaporator coil Low evaporator airflow Increase blower speed or reduce restriction replace air filter Operating below 65 F outdoors Add low ambient kit Moisture in the system Recover refrigerant evacuate amp recharge add filter drier High vapor pressure Excessive load Recheck load calculation Defective compressor Replace Fluctuating head and vapor pressures Air or non condensibles in system Recover refrigerant evacuate amp recharge Pulsing noise at metering device or liquid line Air or non condensibles in system Recover refrigerant evacuate amp recharge 42 Model heat pump 10SEER UNITS Commercial Air Conditioner Model heat pump 10SEER UNITS Haier 11 Wiring Diagram Heat Pump Wiring Diagram one 4 LINE VOLTAGE FACTORY STANDARD FIELD INSTALLED OPTIONAL LOW VOLTAGE FACTORY STANDARD FIELD INSTALLED INDOOR OUTDOOR UNIT UNIT 5 OPTIONAL ELECTRIC HEATERKIT OPTIONAL 1
19. the factory and released to the transportation agency without known damage Inspect exterior of carton for evidence of rough handling in shipment Unpack carefully If damage is found report immediately to the transportation agency 8 2 EQUIPMENT PROTECTION FROM ENVIRONMENT Haier Commercial Air Conditioner Model heat pump 10SEER UNITS Moi The metal parts of the unit may be subject to rust or corrosion in adverse environmental conditions This oxidation could shorten the unit life Salt spray or mist in seacoast areas sulphur or chlorine from lawn watering systems and various chemical contaminants from industries such as paper mills and petroleum refineries are especially corrosive 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 Shielding provided by fence or shrubs may give some protection Regular maintenance will reduce the buildup of contaminants and help to protect the unit s finish WARNING Disconnect all electrical power to the unit before servicing Disconnect power to both the indoor and outdoor units NOTE There may be more than one electrical disconnect switch Failure to shut off power can cause electrical shock resulting in personal injury or death Fr
20. the suction and discharge lines at the compressor stubs Remove the compressor hold down bolts Place the failed compressor on a smooth surface to remove the mounting grommets and sleeves for use with the new compressor Prevent any contamination from entering the refrigerant lines Conduct an acid test on the oil from the failed compressor A B Secure a generous sample of oil from the failed compressor Follow the oil test kit instructions to determine the degree of compressor burn out As a general rule oil with a test number less than 0 05 indicates a mild burn out Oil with a test number greater than 0 05 indicates a serve burn out Some oil test kits indicate severity by color charge a guide burn out classifications are as follows oil clear color Possibly no burn out mechanical failure oil clear slight color Possibly a mild burn out oil very dirty strong odor test 50 05 severe burn out Note Dispose of any contaminated refrigerant oil in accordance with all environmental regulations and procedures Use the following procedures with units having mild to severe burn outs A After compressor removal insert a clean free swab into the system s suction discharge lines to determine the extent of contamination B If contamination is noted for a considerable depth replace with new tubing C Check that the new compressor has no shipping damage The line connections
21. ARE PARTS LIST 44 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS H 1 DESCRIPTION OF PRODUCTS amp FEARURES 1 1 Air conditioner This manual discusses split central air conditioning indoor coils Split refers to the physical location of the major air conditioning components that are not in the same box as a packaged system 10 SEER Seasonal Energy Efficiency Ratio families of split system air conditioning are manufactured to rigid standards of quality and performance They meet or exceed the standards imposed by efficiency legislated and therefore represent both good value today and for years to come The current families of the air conditioning now use scroll and reciprocating compressors This gives the air conditioning a much more durable compressor needing less external protection while increasing the unit efficiency in cooling mode 1 2 NOMENCLATURE FOR MODEL NUMBE Example H C 24 A 1 V A R Nominal SEER Design Reserved Haier System type capacity in Electric Designation Body style designation series 1000 Btuh A 10SEER B 11SEER Y 575V 3Ph 60Hz 15 C Air C 12SEER V 208 230V 1Ph 60 Brand 24 Generatio Conditioner D 13SEER Hz A symb 24000BTU h n E 14SEER C 208 230V 3Ph 60 standard ol H 60 2 2nd R Heat F 15SEER Hz style Haier 60000BTU h Generatio Pump G 16SEER D 460V 3Ph 60Hz
22. Always keep tubing sealed until it is in place and the connections are to be made Refrigerant piping should be as short as possible with a minimum of elbows or bends to avoid capacity loss and increased operating costs Refrigerant lines must be adequately supported If metal strapping is used to secure the tubing do not allow the strapping to directly contact the tubing Use a closed cell insulation to separate the strapping from the tubing Do not kink or twist the tubing Refrigerant piping should not be installed in a cement slab as this limits access to the refrigerant should a leak be suspected To ensure good oil return to the compressor it is important to pitch the horizontal suction line toward the compressor approximately 1 2 for every 10 of line 8 6 Line Insulation Suction line requires insulation in order to prevent condensation from forming on the piping and to prevent heat gain caused by surrounding air Generally 3 8 wall thickness of Arm flex or equivalent is satisfactory In severe application hot high humidity areas greater thickness may be required Apply the line insulation by sliding it on the sealed tubing before cutting and making connections Liquid line does not necessarily need insulation however if they are exposed to high ambient temperatures i e kitchen boiler rooms hot attics amp rooftop surface then they should be insulated Make sure to use the proper size tubing for the liquid line to preven
23. Blower motor Blower motor indoor units 208 230V pedi capacitor UF FLA HP HB2400VA1M20 1515 8 09 18 HB2400VC1M20 1545 8 09 18 HB3000VA1M20 15 15 3 4 3 4 MEANS STRAIN RELIEF MUST BE INSTALLED TO THIS APPLIANCE THE ELECTRICAL SERVICE ENTRANCE When an optional electric heat kit is installed refer to the electrical requirements for that kit The ampacity and over current protection shown above is onl y for HB air handlers installed without a heat kit 8 10 9 YSTEM STARTUP 1 Turn thermostat to OFF turn on power supply at disconnect switch 2 Turn temperature setting as high as it will go 3 Turn fan switch to ON Indoor blower should run Be sure it is running in the right direction 4 Turn fan switch to AUTO Turn system switch to COOL and turn temperature setting below room temperature Unit should run in cooling mode 5 Check to see if compressor and outdoor fan are running correctly 6 Check the refrigerant charge see Instructions under Charging the System 7 Replace service port caps Service port cores are for system access only and will leak if not tightly capped 8 Check unit for tubing and sheet metal rattles 9 Instruct the owner on operation and maintenance Leave this Installation and Operating Manual and the Use and Care Manual with owner 8 11 SEQUENCE OPERATION In order to service and troubleshoot a air conditioning system a service
24. CAL POWER IS OFF TO THE COMPONENT BEING CHECKED 2 Remove at least one wire from the component being checked 3 Measure the resistance of the holding coil with an ohmmeter A special resistance indicates a good holding coil B Infinite 99 resistance indicates a relay with an open holding coil REPLACE this relay with an identical part 4 Measure the resistance across the normally closed NC relay contacts The resistance should be zero 0 ohms B If the resistance is more than 0 2 ohms the contacts are pitted REPLACE this relay with an identical part 5 Measure the resistance across the normally open NO relay contacts A The resistance should be Infinite B Ifthe resistance isn t Infinite REPLACE this relay with an identical part MECHANICAL CHECKS In relays mechanical faults are few with the exception of physical damage AIR FLOW Indoor coil air flow in any air conditioning system is critical Too much air and the customer suffers lack of the dehumidification in cooling Too little air in cooling and coil may freeze Check air flow is the most important checks Instructions can measure pressure drop across the coil If pressure 36 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS drop tables are available they indicate the cubic feet of air per minute CFM moving through the coil An inclined manometer is an example of this type of instrument A velometer measures the velo
25. D1VAR HR36D1VAR HR48D1VAR HR60D1VAR 1 2 1 2 2 flash Vent suction sensor short circuit 1 2 1 2 3 flash LPS amp HPS open circuit 1 2 1 2 4 flash CT sensor out of max range 1 Confirm defrost control board DFC dip switch settings and CT application for system selection as shown in adjacent table Optional components may be field or factory installed 2 If LPS and or HPS not installed or removed a jumper wire must be present across connector CN8 of the defrost control board DFC for system to operate 3 For proper system operation consult indoor unit and outdoor unit installation instructions to confirm system match up and blower speed selection 4 Alternate double pole contactor used on some systems 5 Only one start assist method to be used at a time consult outdoor unit installation instructions for application information Use only factory approved accessories 6 Optional OFM components may connect capacitor common and motor common for reciprocating compressor there may have crankcase heater consult outdoor unit installation instructions for details Select the running capacitor one or dual and connect If IFM or OFM only have one capacitor wire connect Com wire to capacitor 7 To protect equipment from operation at low outside ambient temperatures connect outdoor unit terminal T and equipped indoor thermostat terminal T as shown 8 To activate electric heat circuit during defrost cycle connect outdoor W terminal to available
26. HAIER COMMERCIAL AIR CONDITIONER Service Manual Part AC 8888 107 HAIER TRADING COMPANY LLC www haieramerica com Haier e Commercial Air Conditioning SERVICE MANUAL LJ Mode HR18A1VAR HR24A1VAR HR30A1VAR HR36A1VAR HR42A1VAR HR48A1VAR HR60A1VAR Features High efficiency design Hermetic compressor design Haier Hi Efficiency fin and copper tube design Compact design of outdoor unit Convenient for installation and maintenance Heat pump 10SEER Manual code SYJS AM 004 05 Rev 2 Edition 2005 03 22 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS CONTENTS 1 DESCRIPTION OF PRODUCTS 4 5 3 2 PHYSICAL AND ELECTRICAL SPECIFICATIONS 5 3 SAFETY PREGAUTION 25 sie 9 4 SYSTEM COMPONENTS AND FUNCTIONS 9 5 ELECTRICAL CONTROL 11 GAPPLICATIONS 12 T REFRIGERANT DIAGRAM 13 8 INSTALLATION 68 14 9 MAINTENANCE 8 31 10 SERVICE AND TROUBLESHOOTING 32 11 WIRING 8 2 43 12 EXPLOSIVE DIAGRAM AND SP
27. L LOCATION OF EACH WIRE A Use an ohmmeter set for the highest scale to check for grounding between compressor motor terminals and a good clean ground such as the compressor shell or copper line B The resistance from any terminal to ground should exceed 1 000 000 ohms 6 Use an ohmmeter set for the lowest scale and check the continuity of the motor windings These ohm values are less than ten ohms and in some cases less than one ohm A Lowest from RUN terminal to common terminal lowest ohm value of the three measurements Approximately 1 0 ohms 37 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS o B Measure from Start TERMINAL TO COMMON TERMINAL Middle ohm value of the three measurements Approximately 2 0 to 3 0 ohms C Measure from Start TERMINAL TO Run terminal Highest ohm value of the three measurements Approximately the sum of the first two measurements EXAMPLE Run to Common 1 0 Ohms Startto Common 4 0 Ohms Startto Run 3 0 Ohms Good compressor motor Run to Common Ohms Startto Common co Ohms Start to Run 3 0 Ohms OPEN COMPRESSOR INTERNAL OVERLOAD ALLOW THE COMPRESSOR MOTOR TO COOL AND THE INTERNAL OVERLOAD TO RESET Run to Common 1 0 ohms Start to Common co Ohms Start to Run Ohms OPEN COMPRESSOR START WINDING REPLACE THE COMPRESSOR 7 resistance from one winding terminal to any other terminal should be the same with three phase com
28. N To ensure proper installation and operation completely read all instructions prior to attempting to assemble install operate maintain or repair the product WARNING THE MANUFACTURER S WARRANTY DOES NOT COVER ANY DAMAGE OR DEFECT TO THE AIR CONDITIONER CAUSED BY THE ATTACHMENT OR USE OF ANY COMPONENTS ACCESSORIES OR DEVICES OTHER THAN THOSE AUTHORIZED BY THE MANUFACTURER INTO ONTO OR IN CONJUNCTION WITH THE HEAT PUMP BE AWARE THAT THE USE OF UNAUTHORIZED COMPONENTS ACCESSORIES OR DEVICES MAY ENDANGER LIFE PROPERTY THE MANUFACTURER DISCLAIMS ANY RESPONSIBILITY FOR SUCH LOSS OR INJURY RESULTING FROM THE USE OF SUCH UNAUTHORIZED COMPONENTS ACCESSORIES OR DEVICES Always use good industry recognized service practices in the maintenance adjustment and repair of the products covered in this manual to protect the technician and the customer Always wear safety glasses when handling refrigerant and brazing materials Follow the manufacturer s instructions when making repairs and installing replacement parts and assemblies Use only authorized parts to ensure that the equipment operates at the efficiency and useful life that the manufacturer built into the product 4 SYSTEM COMPONENTS AND FUNCTIONS This section describes the various air conditioning components their purpose and operation This section is only a guide and does not consider all components that could be found on an air conditioner in the field COMPRESSORS
29. The heart of any refrigerant system is the compressor It is a pump causing refrigerant to flow There are several different types of compressors but all use electricity to turn an electric motor to drive a pump Air conditioners use two types of compressors The first is the enhanced reciprocating compressor It operates with an offset crankshaft and pistons and resembles an internal combustion engine The driving force is supplied by an electric motor turning the crankshaft and forcing the pistons into the cylinders where valves control the flow of refrigerant The valves provide a seal between high and low pressure sides of the system If the valves are damaged the compressor s reliability efficiency and effectiveness are reduced or eliminated Reciprocating type compressor Scroll type compressor Fig 4 1 Generally liquid refrigerant is suspected if valve damage occurs Some compressors can tolerate the presence of small amounts of liquid refrigerant in the returning gas but none are designed to withstand it continually Returning refrigerant cools the compressor motor Surrounding the motor with low pressure gas gives it the name of low side shell compressor The scroll compressor used a helix similar in shape to a snail shell to move refrigerant When placed within a similar stationary helix the moving helix rotates so that the space between the two constantly decreases as the gas moves toward the center of the Scrolls The
30. Use this information to service and understand the installation operation and troubleshooting of the current families of air conditioning The procedures in this section are of necessity generic in content Each product family incorporates some of these components Be aware of this is a guide compiled from numerous sources can not take into consideration all conditions found in all installations Note Upon arrival at the job site inspect the installation Make sure the installation was done according to the manufacturer s Installation and Operation instruction Manual Have a copy of the manual in case it was not left on the job site REFRIGERANT RECOVERY Refrigerant system using chlorofluorocarbon CFC and Hydrochlorofluorocarbon HCFC refrigerant have been subjected to increase regulation due to the clean air Act of 1990 This act prohibits the unrestricted release of refrigerant into the air charging of refrigerant system may require removing some refrigerant when the system is overcharged How does one comply with the act and also provide the service that the customer needs By recovering the excess refrigerant Recovery means to pump the special holding container Recycling means to run the refrigerant through a filtering system to remove most particles and moisture Reclaiming means to chemically reprocess the refrigerant to return it to its original purity Recovering and recycling refrigerant is possible with the aid of mecha
31. W PRESSOR ACCUMULATOR COMPRESSOR 77 SERVICE PORT SERVICE PORT DEFROSED SENSOR EVAPORATOR gt CONDENSER 4 L y H CHECK VALVE N DRYER CHECK VALVE ORIFICE DISTRIBUTOR SERVICE VALVE DISTRIBUTOR Heating DISCHARGE TEMP SENSOR SERVICE FORT REVERSING VALVE SERVICE VALVE ya K HIGH PRESSOR K LOW PRESSOR ACCUMULATOR COMPRESSOR 77 SERVICE PORT Le SERVICE PORT DEFROSED SENSOR CONDENSER 4 EVAPORATOR INDOOR COIL OUTDOOR COIL CHECK VALVE DRYER CHECK VALVE ORIFICE ORIFICE DISTRIBUTOR SERVICE VALVE DISTRIBUTOR Haier Commercial Air Conditioner Model heat pump 10SEER UNITS o injury or death This product is designed and manufactured to permit installation in accordance with National Codes It is the installer s responsibility to install the product in accordance with National Codes and or prevailing local codes and regulations The manufacturer assumes no responsibility for equipment installed in violation of any codes or regulations The United States Environmental Protection Agency EPA has issued various regulations regarding the introduction and disposal of refrigerants in this unit Failure to follow these regulations may harm the environment and can lead to the imposition of substantial fines Because these regulations may vary due to the passage of new laws we suggest that any work on this unit be don
32. ass fiber filters when dirty 3 Clean semi permanent plastic impregnated fiber filters A Vacuum clean or B Wash with detergent and water air dry thoroughly and re install Caution Do not operate any system without filters Note if an electronic air cleaner is installed remove any mechanical filter from the air handler Follow the maintenance instructions furnished with the electronic cleaner LUBRICATION In todays products indoor blower motor bearings outdoor unit fan motor bearing are pre lubricated by the motor manufacturer Motors with oil ports Add 10 to 20 drops of Electric motor oil or an SE grade non detergent SAE 10 OR 20 grade motor oil to each bearing A every two years for continuous duty B atleast every three years for somewhat continuous duty C atleast every five years for light duty To access oiling ports or to re lubricate the sealed bearing of the indoor blower motor remove the blower assembly For access to the outdoor fan motor remove the unit top and turn the motor onto its with the oil ports up OUTDOOR COIL CLEANING Keep the outdoor coil clean for complete air flow and proper operation Do not allow leaves grass clippings or other material to obstruct the coil Do not allow anything to block the coil Keep fences shrubs or other obstructions at least 24 away from the coil air inlets If the coil becomes obstructed clean it with water from a garden hose 31 Haier Commercial Air Conditi
33. city of the air in feet per minute FPM If the area of duct is known the velometer reading times the area of duct in square feet calculates the air flow There also simple mathematical formulas that are needed of them require measurement be taken These measurements require a voltmeter ammeter and a good temperature tester Caution these following procedures can only be done with electric resistance heaters v Electrical Heater VOLTS X AMPS X 3 414 1 08 X TEMP RISE COMPRESSOR AND SYSTEM FAULT DIAGNOSIS Many returned compressors have nothing wrong with them To ensure that does not happen the technician must determine if the compressor has failed or if another control has either failed or stopped the compressor after detecting a problem The following procedures should help determine if the compressor has failed Prior to replacing a suspected failed compressor a thorough check must be made of all existing electrical components If not done a replacement compressor might also failed or not operate at all WARNING THE FOLLOWING PROCEDURES SHOULD ONLY BE ATTEMPTED BY A QUALIFIED LICENSED SERVICE TECHNICIAN EQUIPPED WITH PROPER TOOLS AND INSTRUMENT SUCH AS A REFRIGERANT RECOVERY VACUUM PUMP THERMOMETERS PRESSURE GAUGES MICRON METER ETC COMPRESSOR ELECTRICAL CHECKS Single phase compressors use permanent split capacitor motors There are two windings that co
34. cover from the lower left access panel Fig 8 5 3 Relocate horizontal pan on the left hand side of the coil assembly 4 Knockouts are located within the drain assemblies Carefully remove only the correct knockouts using a hammer and screw driver for each application making sure the primary and secondary drains are open and clear of burrs and debris Remove secondary drain 26 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS knockout only if this drain is required in this particular installation WARNING If incorrect knockouts are removed flooding will occur 5 Reinstall in the Air handler the A coil pan assembly with the horizontal drain pan on the left hand side Note Push the assembly completely to the rear of the cavity and assure it slips into channel bracket at the rear of the cavity 6 Replace the J shape metal bracket or brackets on the vertical drain pan and place the plastic oval gasket on horizontal drain pan Reinstall access panels and flowrator making sure not to over torque screws Snap in the drain cover on the right lower service panel 7 The Air handler can now be placed in its left horizontal position as shown in Fig 2 The Air handler must be leveled and then pitched 1 4 toward drain side Important Drain pan must be tested for proper drainage by pouring water into the pan Traps must be installed on the primary drain and on the secondary drain if used 8 In all cooling applications
35. d 180 x WRAPPER degrees from their former position and shifted down with return in up position as shown in fig 1 and fig 2 3 Assemble drain pan insulation kit to the bottom of the drain pan to prevent drain pan from sweating during operation 4 Place 3 flat insulation retainer on the bottom of each coil slab against the aluminum fins as shown in Fig 3 This will reduce the potential for water blow off into the air stream 5 Slide the coil assembly into Air Handler and reattach the metal coil retainer bracket to tie bracket See Fig 2 Then reattach the upper access panel followed by the two lower access panels to match the tubing and drains 6 A 4 to 3 removable panel is recommended at the point where the duct meets with the return part of the Air Handler unit to allow easier removal of coils that are too tall INSULATION JACKET ZEE COIL lent WRAPPER STIFFENER DRAIN INSULATION RETAINER both sides Fig 8 7 7 The coils are shipped with a check flowrator for use with either cooling or heat pump outdoor section which is accessible from the outside of the unit WARNING The A coil contains 150 p s i g of air pressure Before setting up flowrator assembly for field brazing see page 12 or read the Warning label on the lower access panel REFRIGERANT TUBING Refrigerant tubing should be installed as to avoid undue stress Th
36. e by a certified technician Should you have any questions please contact the local EPA office The manufacturer s warranty does not cover any damage or defect to the air conditioner caused by the attachment or use of any components accessories or devices other than those authorized by the manufacturer into onto or in conjunction with the air conditioner You should be aware that the use of unauthorized components accessories or devices may adversely affect the operation of the air conditioner and may also endanger life and property The manufacturer disclaims any responsibility for such loss or injury resulting from the use of such unauthorized components accessories or devices Attach the service panel to the outdoor unit securely If the service panel is not attached securely it could result in a fire or an electric shock due to dust water etc These instructions are intended as an aid to qualified licensed service personnel for proper installation adjustment and operation of this unit Read these instructions thoroughly before attempting installation or operation Failure to follow these instructions may result in improper installation adjustment service or maintenance possibly resulting in fire electrical shock property damage personal injury or death This product is designed and manufactured to permit installation in accordance with National Codes It is the installer s responsibility to install the product in accordance with Nationa
37. en sure of a tight well evacuated system charge with refrigerant 8 7 Charging the System For systems with capillary tube or fixed orifice metering device Before checking the system charge make sure that the outdoor unit and indoor coil must be an approved match per the unit specification The indoor conditions should be within 2 F of the desired comfort conditions WARNING Do not vent refrigerant to the atmosphere It is a violation of federal law to do so If the refrigerant needs to be removed from a system to correct the charge inside always use a recovery or recycling device WARNING prevent personal injury wear safety glasses and gloves when handling refrigerant 1 Fully open both shutoff valves 2 Connect service gage manifold to the valve service ports being sure to evacuate lines 3 Startup the system Run system at least 10 minutes to allow pressure to stabilize 4 Temporarily install thermometer on suction large line near condensing unit Be sure of good contact between thermometer and line Wrap thermometer with insulating material to assure accurate reading 5 Refer to Table 8 2 for proper system superheat Add charge to lower superheat Remove charge to raise superheat Carefully remove gage lines 20 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS System Superheat Ambient Return Air Temperature F Temperature At Condenser Inlet 65 70 75 80 85
38. ensible capacity How much sensible heat can the unit remove Sensible heat is the heat energy measured on the dry bulb thermometer The second form of heat is called latent or hidden heat This is heat held in the humidity in the air Removing this heat does not affect a thermometer However removing the heat held in the moisture in the air greatly increase comfort A properly sized unit removes both forms of heat producing a comfortable living space An oversized system cycles on and off too quickly and does not properly remove humidify producing an uncomfortable living space Select the indoor and outdoor equipment combination based on the manufacturer s engineering data After the proper equipment combination has been selected satisfying both sensible and latent conditioning requirements the system must be properly installed Only then can the unit provide the comfort the manufacturer built into it There are several factors that installers must consider Outdoor unit location Proper equipment evacuation Outdoor unit refrigerant charge Indoor unit air flow Indoor unit blower speed Supply and return air duct design and sizing System air balancing Diffuser and return air grille location and sizing Unit Dimensions Model HR18 60A1VAR A1VAR HR18 HR24 HR30 HR36 HR42 HR48 HR60 D 23 585 23 585 23 585 23 585 30 1 4 770 30 1 4 770 30 1 4 770 23 585 23 585 23 585 23 585 30 1 4 770
39. equent washing of the cabinet fan blade and coil with fresh water Regular cleaning and waxing of the cabinet with good automobile polish A good liquid cleaner may be used several times a year to remove matter that will not wash off with water The best protection is frequent cleaning maintenance and minimal exposure to contaminants 8 3 INSTALLATION These units are designed for outdoor installations They can be mounted on a slab or rooftop It is important to consult your local code authorities at the time the first installation is made Check following points before attempting any installation Structural strength of supporting members Clearances and provision for servicing Power supply and wiring Location for minimum noise where operating sounds will not disturb owner or neighbors Location where there is no risk of combustible gas leakage Location where external water drainage cannot collect around the unit Location where roof runoff water does not pour directly on the unit Provide gutter or other shielding at roof level Don t locate unit in an area where excessive snow drifting may occur or accumulate Provide a level concrete slab To prevent transmission of noise or vibration slab should not be connected to building structure Some sort of sound absorbing material should be placed between the condenser and the slab A good material to use is rubber and cork pad For rooftop application make sure the building construc
40. er duct materials have been successfully used Carefully follow the duct manufacturers installation instructions The duct system is only as good as the planners and installers construct Air supply diffusers must be selected and located carefully They must be sized and positioned to deliver treated air along the perimeter of the space If they are too small for their intended air flow the become noisy If they are not located properly they cause drafts on the occupants in the rooms Return air grilles must be properly sized to carry air back to the blower If they are too small they also cause noise The installers should balance the air distribution system to ensure proper air flow to all rooms in the home This ensures a comfortable living space 7 Refrigerant system diagram refer figure below 8 INSTALLATION INSTRUCTIONS WARNING These instructions are intended as an aid to qualified licensed service personnel for proper installation adjustment and operation of this unit Read these instructions thoroughly before attempting installation or operation Failure to follow these instructions may result in improper installation adjustment service or maintenance possibly resulting in fire electrical shock property damage personal Haier Commercial Air Conditioner Model heat pump 10SEER UNITS Figure 7 Heat Pump Refrigerant Circuit DISCHARGE TEMP SENSOR SERVICE RORI REVERSING VALVE SERVICE VALVE K HIGH PRESSOR K LO
41. ey must be supported or routed to avoid strain or vibration To avoid damage that can be caused by condensate insulate the suction tube with a closed cell insulation with the seams sealed The insulation should terminate at the tubing entrance to the air handler Do not reduce the recommended tubing size CONDENSATE REMOVAL 28 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS THIS APPLIANCE EMPLOYS A DRAW THROUGH COIL THEREFORE A TRAP MUST BE INSTALLED IN THE DRAIN LINE S TO ALLOW FOR PROPER CONDENSATE DISPOSAL The condensate trap must not be the running type type A trap is required The total workable height of this trap in inches must exceed the total negative pressure in inches of water as measured in the return duct DRAIN CONNECTION UNIT FLEXIBLE TUBING HOSE OR PIPE 2 MINIMUM i MINIMUM A POSITIVE LIQUID SEAL 18 REQUIRED Fig 8 8 The condensate drain line must be at least 3 4 NPT for each unit Precautions must be used not to over tighten the adapter at the drain pan connection this precaution will prevent damage to the plastic drain pan joint compound should be used to prevent leakage and act as a lubricant When using copper tubing as a condensate line adequate caution must be taken to prevent damage to the plastic drain pan during the soldering process All condensate drain lines and drain traps should be adequately insulated The unit and
42. gent and water solution Rinse thoroughly with clear water Be careful not to get water into the air handler 3 After cleaning the coil inspect the drain pan and condensate line Remove any debris from the pan and flush with clear water 4 Use high pressure water to clear any clog in the condensate line WARNING DO NOT USE CAUSTIC HOUSEHOLD DRAIN CLEANERS IN THE CONDENSATE PAN OR NEAR THE INDOOR COIL THESE DRAIN CLEANERS QUICKLY DAMAGE THE INDOOR COIL 10 SERVICE AND TROUBLESHOOTING WARNING THE ABILITY TO PROPERLY PERFORM SERVICE ON THIS EQUIPMENT REQUIRES CERTAIN EXPERTISE MECHANICAL SKILLS TOOLS AND TEST EQUIPMENT YOU DO NOT POSSESS THESE DO NOT ATTEMPT TO PERFORM ANY MAINTENANCE ON THIS EQUIPMENT OTHER THAN THOSE PROCEDURES RECOMMENDED IN THE USER S MANUAL A FAILURE TO FOLLOW THIS WARNING COULD RESULT IN POSSIBLE DAMAGE TO THE EQUIPMENT SERIOUS TO THE EQUIPMENT SERIOUS PERSONAL INJURY OR DEATH The HVAC industry the auto industry is faced with increasing government imposed efficiency regulations New and more sophisticated mechanical means for achieving higher efficiencies have been engineered The use of test equipment is now more critical than ever In the servicing and troubleshooting section is information on compressors and other components and their test procedures There are troubleshooting charts charging charts wiring diagrams and service analyzer charts Included is list of suggested test equipment
43. h technician must be certificated under an approved program Failure to properly handle refrigerant may cost technician s job and also a stiff fine Up to 25 000 may be charged for a pattern of disregards concerning this very important federal law WARNING FOR YOUR OWN PROTECTION ALWAYS HAVE A RECOVERY RECYCLING DEVICE PRESENT WHEN DOING REFRIGERANT SERVICE TEST EQUIPMENT The following test equipment is recommended to properly service air conditioning equipment 1 A good quality volt ohm meter 2 A two temperature electronic thermostat 3 A Magnetic Gauge capable of reading to 3 W C 4 A Gauge manifold set 5 A clamp on ammeter 6 An electronic leak detector or bottle of soap suds 7 A micron meter not shown 8 A vacuum pump capable of pulling to 2000 microns 9 Refrigerant recovery recycling equipment NOTE Carry and store any test equipment in a manner to prevent damage vacuum pump Fig 10 1 Before beginning any troubleshooting procedure complete the following installation checklist An equipment problem is sometimes caused by an improper installation By completing this checklist the problem may be found and corrected Make copies of the checklist and complete one for every air conditioning system call for your records 10 2 INSTALLATION AND SERVICE CHECKLIST Refer to the unit installation instructions for the specifics ELECTRICAL m Correct the thermostat and subbase Correct thermostat m
44. igh pressure gauge to its associated pressure on a temperature pressure conversion chart The refrigerant pressure should equal the chart pressure for the given temperature A The system pressure is above the chart pressure Cause Non condensales are present air Haier Commercial Air Conditioner Model heat pump 10SEER UNITS HE o o o o and moisture ACTION Remove and recover the refrigerant Evacuate the system Charge with fresh clean refrigerant The system pressure is below the chart pressure Cause A mixed refrigerant is present ACTION Remove and recover the refrigerant Evacuate the system Charge with fresh clean refrigerant COMPRESSOR REMOVAL PROCEDURES USE THESE PROCEDURES ONLY IF A PROVEN BURN OUT OR A FAILED COMPRESSOR BY ELECTRICAL CAUSES HAS BEEN DETERMINED CAUTION After a server motor burn out the products of the burn out the products of the burn out may be acidic The technician should wear rubber gloves and eye protection to prevent injury Use the following procedure for compressor removal ONLY after determining that the compressor has failed DISCONNECT THE MAIN POWER SOURCE TO THE UNIT AND LOCK THE DISCONNECT SWITCH IN THE OPEN POSITION Disconnect the electrical wiring at the compressor identifying each wire and its location Remove the refrigerant charge from the entire system using proper recovery pressures Remove the failed compressor 1 2 3 4 6 40 A B D Unsolder
45. indoor heat circuit W or W2 9 Indoor unit shipped without optional electric heater kit To install optional heater kit remove power pig tail up to 9 pin plug Install heater kit and connect with mating 9 pin plug Run system power connections directly to electric heater kit power terminals Consult heater kit installation instructions for complete details Note The diagram wiring of the fan motor maybe have some difference from the real parts due to different types of fan motor the detailed information can refer to the fan motor nameplate Outdoor Wiring Diagram HR18A1VAR HR60A1 VAR Haier Commercial Air Conditioner Model heat pump 10SEER UNITS Sincere Forever Haier Group Haier Industrial Park No 1 Haier Road 266101 Qingdao China http www haier com
46. l Codes and or prevailing local codes and regulations The manufacturer assumes no responsibility for equipment installed in violation of any codes or regulations The United States Environmental Protection Agency EPA has issued various regulations regarding the introduction and disposal of refrigerants in this unit Failure to follow these regulations may harm the environment and can lead to the imposition of substantial fines Because these regulations may vary due to the passage of new laws we suggest that any work on this unit be done by a certified technician Should you have any questions please contact the local EPA office The manufacturer s warranty does not cover any damage or defect to the air conditioner caused by the attachment or use of any components accessories or devices other than those authorized by the manufacturer into onto or in conjunction with the air conditioner You should be aware that the use of unauthorized components accessories or devices may adversely affect the operation of the air conditioner and may also endanger life and property The manufacturer disclaims any responsibility for such loss or injury resulting from the use of such unauthorized components accessories or devices Attach the service panel to the outdoor unit securely If the service panel is not attached securely it could result in a fire or an electric shock due to dust water etc 8 1 OUTDOOR UNIT INSPECTION This product has been inspected at
47. measure the time since the power was interrupted It is set for up to 3 minutes It is not field adjustable It is a dela on break timer Compressor relay PCB Fig 5 1 START KITS OPTIONAL This special relay uses the 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 Start kits are not normally required with scroll compressors The operating characteristics of the scroll compressor make a start kit unnecessary 6 APPLICATION Before specifying any air conditioning equipment a survey of the structure and a heat gain calculation must be made A heat gain calculation involves identifying all surfaces and openings that gain heat from the surrounding air and quantifying that heat gain It also calculates the extra heat load caused by sunlight and by humidity removal These factors must be considered before selecting an air conditioning system to provide year round comfort The Air Conditioning Contractors of America ACCA J Manual method of load calculation is one recognized procedure for determining the cooling load 12 Commercial Air Conditioner Model heat pump 10SEER UNITS Haier The cooling load calculation determines the unit size There are two capacities that enable the equipment to provide comfort The first is s
48. mp 10SEER UNITS HE o 2 Physical and Electrical Specifications 10 SEER Model Number Number HRIBAIVAR HR2AMWVAR HR36A1VAR HRA2AWVAR HRABAIVAR 1 5 Ton Outdoor 2 Ton Outdoor 2 5 Outdoor 3 Ton Outdoor 3 5 s 4 Ton Outdoor 5 Ton Outdoor Comments HP HP HP HP HP HP Model Status New Model New Model New Model New Model New Model New Model New Model Performance C D A gn m i did m mni d Indoor Unit Matching with HB2400VA1M20 HB3600VA1M20 HB4200VA1M25 HB4800VA1M25 cooling Capacity Buh __________ Capacity Btu h 1800 000 2300 000 2800 000 3500 000 4200 000 4600 000 _ 54 000 000 ME tte pum sw omo ww bm 10911 21 wo s cum 1 sw mo oxo mom sew sow herac eso os os pos 0 so so 7 mars o mes sur wm x ww ww m Vonago Prase reme neat anam e no 1 n oto 1 er 1 0 wa ze we Tre Newman Faso sum 0 me x w
49. nical devices made for the purpose The recovery system is a compressor driven pump assembly which removes refrigerant from 32 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS H o system and safely stores it a department of Transportation DOT approved container until it is re used or returned for reclaim The authors of the EPA regulations enforcing the Clean Air Act realized that an accidental release of the refrigerant may happen in the course of normal service Any such incidents that happen while making good faith attempts to recover refrigerant would be considered Always use procedures so as not to release any refrigerant Purging the hoses to clear them of air is an example The latest refrigerant hoses have a valve within twelve inches of their ends The entire hose does not have to be purged When performing service on a refrigerant system charging should be done using the best service practices ensuing that the least amount of refrigerant needed is used After fabrication and installation of the lines do not flush a line set with refrigerant venting refrigerant to the atmosphere subjects both the installer or the technician and their employer to federal fines Lines must be evacuated before charging with refrigerant Each installer and technician must be informed on the provisions of the clean Air Act and understand the impact on the installation and service of the refrigerant systems Eac
50. nnect at a common point at the common wiring terminal The two windings are called start and The start winding has the higher resistance and is connected in series with the capacitor The run winding has the lower resistance and connects directly to the power supply from the compressor contactor The design use a protective device called an internal overload if it detects either dangerously high amperages or temperatures in the compressor motor it opens an internal circuit to stop the motor ELECTRICAL CHECK COMPRESSORS 1 Consult the unit wiring diagram Determine that all electrical wiring for the units is correct and that all wiring connections are right 2 Measure the available line voltage A On the single phase 208 230Volt units this should be from 197 to 253 Volts 3 Check for proper control voltage at the unit contractor coil If this voltage is inadequate or is not present refer to the wiring diagram or the compressor troubleshooting flow chart at the end of this section for possible causes 4 Remove all power from the unit and visually inspect the compressor contactor for pitted or burned points A This could indicate high or low voltage problems or improper start components B check the contactor coil with an ohmmeter for a short or open circuit C Replace the contactor if any fault is noted 5 WITH THE ELECTRICAL POWER OFF remove all power wires from the compressor terminals MARK THE ORIGINA
51. ns ps compressor time bey w m m w Fan Delay wo no bum 1 L ves ve ves ves Dimensions and Installation Unit Dimensions inches es Ja Je on on mm jm pos os sm sso er wor Refrigerant Line 3 9 99 se se ___ un fu o sof __ Rewane Reese Revwate roue roue Retigerant Comecton eremo device ston sin Cooing means fonce 074050 oie 08706 orice 081074 178 orrcemenoen moarCmgego nome sseoimsas 2750 107 17 esso noori narar 40007 4124 4400 115548 LL jew me pow E uen Haier Commercial Air Conditioner Model heat pump 10SEER UNITS o 3 SAFETY PRECAUTIONS CAUTIO
52. o messe meh s me wa we x gt o s wo wo ae cmm me mm m uw Haier Commercial Air Conditioner Model heat pump 10SEER UNITS HE o uem e es us om om om om 5 Fan Material 7 Zinc Costed Stesfinc Coated Steefinc Coated Steefine Coated Stef ALUMINIUM ALUMINIUM ALUMINIUM Condenser coil MNumberorrows __ __ _____ be spacings vem em Fins per Inch FPI s 9 zm z m enhanced ne Enhanced is Enhanced a Enhanced Enhanced a Enhanced a Tube and Type 8 Grooved sa Grooves 3 8 Grooved 8 Grooved 38 Grooved 98 Grooved 3 8 Grooved Gross Finned Face area sary _____ 9 54 2065 _ sa se s s s Exterior Appearance Cabmecoo
53. ode and setting Correct line supply voltage for indoor and outdoor units Proper equipment ground to the electrical panel 33 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS o sehen Correct control voltage Proper disconnect switches breakers for indoor and outdoor units m Correct wire sides for both indoor and outdoor units OUTDOOR UNIT INSTALLATION Unit level with proper clearances for air flow and service Proper elevation of outdoor unit m Solid pad m Coil free from dirt and debris Unit charged according to manufacturer s instructions Any evidence of refrigerant leaks REFRIGERANT LINES Proper length according to manufacturer s instructions Proper size according to manufacturer s instructions Large vapor line insulated No inadvertent oil traps ENTE No kinks or restrictions n Any evidence of refrigerant leaks INDOOR UNIT INSTALLATION RTS Adequate clearances for air flow and service Adequate supply and return air ducting Air ducts sealed to prevent leakage Correct filter s External static pressure inches W C Proper air flow about 400 CFM per ton n Correct indoor coil and accessories Any evidence of refrigerant leaks ne ane Condensate line piped with trap and vent Horizontal drain pan installed in hori
54. of air per minute 400CFM TON Duct design and construction should be carefully done System performance can be lowered dramatically through bad planning or workmanship In cooling a hot attic can cause a temperature gain of 3 in the return duct and 4 in the supply duct This can reduce the cooling capacity of an air conditioning system by as much as 30 means a loss of almost one ton of cooling capacity from a three ton system Air leakage of only 3 in a return duct can cause 5 loss in system capacity 396 leakage on a three ton system is only 30 CFM Two or three unsealed joints can cause this leak Sealing the return and supply ducts pays dividends in increased system capacity and lower operating costs Effective duct insulation is essential to prevent loss of capacity and sweating ducts in the cooling mode Duct systems installed in the conditioned space can be left uninsulated but a dense 1 2 fiberglass duct liner reduces blower and air noises and prevents sweating ducts when humidity levels are high Supply and return duct systems in attics and crawl spaces require a minimum 1 of dense duct liner or 2 fiberglass wrap with a sealed vapor barrier A leaky vapor barrier results in duct sweating causing wet insulation Wet insulation does not insulated Heat transfer through poorly insulated systems can result in over 5096 loss in operating capacity Sweating ducts also promote rusting ducts resulting in premature duct failure Oth
55. oner Model heat pump 10SEER UNITS o A First TURN OFF ELECTRICAL POWER to the outdoor unit B Remove the top with the outdoor fan attached C Flush water through the coil from the inside out NOTE Do not to get water on any controls or other electrical devices If anything electrical gets wet dry it thoroughly before energizing There are commercial coil cleaning solvents Follow the solvent manufacturer s instructions when using Normally the solvent is sprayed onto the coil Allow several minutes for the solvent to dissolve any organic matter Wash away the solvent and any dissolved matter with water from a garden hose 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 This prevent air flow through the outdoor coil causing dangerous system pressure Compressor damage result INDOOR COIL MAINTENANCE Inspect the indoor coil at least once a year for cleanliness and clean as necessary 1 The coil can be cleaned when dry If it is coated with lint or dirt blow compressed air or nitrogen NEVER USE REFRIGERNAT through the supply air side of the coil fins Place a sheet of metal or cardboard under the return air side of the coil to catch any debris before it gets into the air handler 2 If the coil is coated with oil or grease clean with a mild deter
56. oor unit is above the outdoor unit Fig 8 2 B To ensure good oil return to the compressor when the indoor unit is below the outdoor unit suction line oil trap should be used as illustrated in Fig 8 2 A Tubing Connections CAUTION Use extreme caution in removing the caps from the suction and liquid line fittings as there is pressure present A fitting is on the liquid line to remove pressure CAUTION Condensing units are charged with refrigerant Condensing unit liquid and suction valves are closed to contain the charge within the unit Do not force the valve stem against the retaining ring If the valve stem is backed out past the retaining ring system pressure could force the valve stem out of the valve body and possibly cause personal injury Instructions on the field tubing connections and valve opening procedure are as follow 1 Tubing should be cut square Make sure it is round and free of burrs at the connecting ends Clean the tubing to prevent contamination from entering the system 2 Make sure that both refrigerant shutoff valves at the outdoor unit are closed 19 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS 3 Push the tubing into the fitting until it stops This prevents flux from getting into the system 4 Remove the cap and Schrader valve core from the service port to protect the valve seals 5 Wrap a wet rag around the valve stub before brazing 6 Braze the joints of interconnecting tubing
57. order to have an unrestricted air flow owners should be advised to avoid lawn mower discharge toward the unit depositing debris on the fin coil surface reducing the unit efficiency 8 5 REFRIGERANT PIPING The refrigerant piping is very important as it affects the proper operation and efficiency of the air conditioning system Note the following guidelines 1 The total run both vertical and horizontal can t be exceed 50 feet 2 Use the next larger liquid line size if the vertical separation exceeds 10 feet Haier Commercial Air Conditioner Model heat pump 10SEER UNITS H OUTDOOR UNIT ADDITIONAL SUCTION LINE OIL TRAP FOR EACH 20 FOOT RISE OF PIPE PITCH SUCTION LINE TOWARD OUTDOOR UNIT 1 2 FRO EVERY 10 OF LINE INDOOR UNIT OR 0 LEVEL TO OUTDOORUNIT suc r SI TRAP WHEN INDOOR UNIT 15 4 FEET OR OUTDOOR UNIT MORE BELOW OUTDOOR UNIT INDOOR UNIT LIQUID LINE INDOOR UNIT BELOW OUTDOOR UNIT Figure A Figure B INVERTED LOOP LI LIQUID LINE INDOOR UNIT 50 OUTDOOR UNIT 1272 1722 4277 T CA 221 SUCTION LINE Figure C Fig 8 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 in doubt blow out the tubing with dry nitrogen to remove any chips or debris before connection
58. outdoor coil circuiting single and multi circuited The 10 series are all multi circuits Fig 4 5 SERVICE VALVES There are two types of service valve used on the air conditioning They are the service port valve or Schrader valve and the refrigerant line valve The Schrader valve is like a tire valve in an automobile The stem or core is removable with a flexible seal at its base held closed with a spring Schrader valves allow a technician to connect gages to the system with a minimum loss of charge Use a cap with an inner seal to prevent leakage and keep dirt and moisture out The refrigerant control valve lets the system be isolated into two separate sections In split system These valves hold the charge in the outdoor section from the time of manufacture until the unit is connected to the indoor section by the installer 5 ELECTRICAL CONTROL DEVICES THERMOSTATS Thermostats are the most obvious control in the air conditioning since these controls are accessible by the consumer Contact the local distributor for information on part numbers of various manual changeover auto changeover and set back thermostats or see the thermostat and subbase selection information found in the wiring diagram booklet In the cooling mode the thermostat calls for cooling by energizing the compressor contactor and the indoor blower control The indoor blower can operate continuously by setting the thermostat subbase fan switch to the ON
59. pressors 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 COMPRESSOR MENCHANICAL CHECKS Compressors fail mechanically due to bearing failure valve failure or damage to the internal suspension system Bearing and valve failure is almost always caused by liquid refrigerant COMPRESSORS CAN ONLY PUMP REFRIGERANT VAPOR Liquid refrigerant damages the valves by deforming or breaking slugging them It damages the bearing by diluting the lubricating oil SYSTEM PUMP DOWN This procedure tests the compressor valves can indicate internal refrigerant leaks such as through the liquid line service valve The procedure uses the compressor to trap all the refrigerant inside the condensing coil outdoor cooling The technician s gauges indicate if the condensing coil holds the refrigerant as intended or if it leaks out Procedure 1 Connect the compound refrigerant gauge to a service port that is always suction pressure such as on the compressor shell or in the line between accumulator and compressor Connect the high pressure gauge to a service port that is always high pressure 2 With the unit operating from seat close the liquid line service valve Observe the gauges The suction pressure should fall The high pressure should also fall slightly If the discharge pressure rises above 400 psi Shut off about outdoor unit
60. ressure activated switch It opens an electrical circuit when the refrigerant pressure exceeds a pre determined limit of 440 to 460 p s i g This switch can restore Haier Commercial Air Conditioner Model heat pump 10SEER UNITS H automatically when pressure value becomes normal Fig 1 10 RELAYS Relays provide control switching The voltages controlled may be either low 24V A C or line voltage It is usually 24 volts Contact voltage may be either low or line voltage COMPREESSOR CONTACTOR The compressor contactor is a large relay The coil uses 24 volts but the contacts carry line voltage The contactor controls compressor and the outdoor fan operation Some contactor use single pole contacts while others use 2 pole or 3 pole contacts Single pole contacts break power to only one side of the compressor and outdoor fan The other side remains hot with voltage The 2 pole or 3 pole contactor breaks power to all sides of the compressor and outdoor fan CAUTION WITH A SINGLE POLE CONTACTOR ONE SIDE OF A 240 V A C CIRCUIT IS ALWAYS HOT THIS MEANS ALL WIRING IN THE HIGH VOLTAGE CIRCUIT MAY HAVE A POTENTIAL OF 120 V A C TO GROUD BEFORE SERVICING THE UNIT ALWAYS TURN OFF POWDER AT THE UNIT DISCONNECT SWITCH OPTIONAL RELAYS AND KITS A Time Delay in the compressor contactor low voltage circuit allows time for system pressure to equalize before re starting the compressor This relay user solid state circuitry to
61. returning refrigerant gas first cools the motor then flows into the suction intake of the compressor scroll The discharge gas leaves from the center of the helix and exits the compressor The lower part of the shell should be cool to the touch All current single phase units use two types of compressors In construction the two compressors are quite different In function they are identical Scroll units do not need start components or crankcase heaters The reciprocating compressor may need both Both types benefit from using a time delay This Haier Commercial Air Conditioner Model heat pump 10SEER UNITS H prevents thermostat short cycling and momentary power interruptions from damaging the compressor Both compressor types are protected 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 The outdoor unit of split systems contains an outdoor fan motor These PSC permanent split capacitor motors are single speed motors driving a propeller fan The motor mounts to the unit top with the shaft down The fan pulls outdoor air through the outdoor coil Fan motor Fig 4 2 To access the motor carefully remove the unit top to avoid damaging the blade or motor WARNING WHEN SERVICING THIS MOTOR TURN OFF THE ELECTRICAL POWER TO THE OUTDOOR UNIT The indoor air handler also has a
62. t liquid refrigerant flashing to a vapor within the liquid line Do not allow the vapor line and liquid line to touch together This would cause an 18 undesirable heat transfer resulting in capacity loss and increased power consumption Commercial Air Conditioner Refrigerant Line Sizing Check the following table Table 8 1 for correct suction and liquid line sizes for any combination of the unit size and the maximum refrigerant line length Refrigerant Line Sizin Model heat pump 10SEER UNITS Refrigerant Line Length Ft Unit Size 0 24 25 49 50 74 Line Outside Diameter In Suction Liquid Suction Liquid Suction Liquid 1 5 5 8 3 8 3 4 3 8 3 4 3 8 2 0 5 8 3 8 3 4 3 8 3 4 3 8 2 5 3 4 3 8 3 4 3 8 7 8 1 2 3 0 7 8 3 8 11 8 3 8 11 8 1 2 3 5 7 8 3 8 11 8 3 8 11 8 1 2 4 0 7 8 3 8 11 8 3 8 11 8 1 2 5 0 7 8 3 8 11 8 3 8 11 8 1 2 Table 8 1 The factory charge is sufficient for 25 feet of standard liquid line For longer or shorter liquid line lengths adjust the charge as follows 1 4 Line 0 3 oz Per foot 5 16 Line 0 4 oz Per foot 3 8 Line 0 6 oz Per foot 1 2 Line 1 2 oz Per foot Vertical Separation between Indoor and Outdoor Units Maximum allowable vertical separations between indoor and outdoor units are illustrated in Fig 8 2 A and Fig 8 2 B It s 70 when the indoor unit is below the outdoor unit Fig 8 3 A and 50 when the ind
63. technician must understand the unit s sequence of operation this is the order of events the system undergoes to cycle itself on and off Knowing how the units operate properly aids in determining where to start troubleshooting when the unit doesn t operate properly Where the system varies from its normal sequence is a major clue to any problems COOLING CYCLE Mechanical the operation sequence as follows 1 The compressor pumps out high pressure superheated refrigerant vapor 2 The vapor leaves the compressor and passes through the reversing valve 3 It flows through the outdoor vapor line to the finned outdoor coil Air from the outdoor fan removes heat from the refrigerant vapor When enough heat is removed vapor condenses into a high pressure liquid The liquid temperature is slightly warmer than ambient air temperature 30 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS o 4 This warm pressure liquid leaves the outdoor coil flows through the small copper refrigerant liquid line 5 At the end of the liquid line the refrigerant passes through the a flowcheck device reducing a pressure and temperature 6 As the cool liquid under reduced pressure enters the indoor coil surface it expands and absorbs heat from the indoor air passing over the finned surface Heat from the indoor air causes the low pressure liquid to evaporate and cools the indoor air The refrigerant
64. the auxiliary drain pan must be adequately elevated to insure proper drainage Use of a condensate removal pump is permitted when necessary This condensate pump should have provisions for shutting off the control voltage should a blocked drain occur A trap must be installed between the unit and the condensate pump Important The evaporator coil is coated with oils that will dissolve Styrofoam and certain types of plastics Therefore a removal pump or float switch must not contain any of these materials ELECTRICAL CONNECTIONS The required electrical power supply information is located on the series and rating plate on the exterior of the unit Wiring selection must be in accordance with local codes or in absence of local code the National Electrical Code A disconnect means should be installed within sight of the unit when required by code Copper wire is recommended for all electrical connections When an optional heat kit is installed refer to the electrical requirements in that kit The wiring diagram included in the heat kit must be placed over the wiring diagram on the air handler All pertinent information such as the rating plate included in the optional heat kit must be applied to the Air Handler as indicated The use of copper connections are recommended inside the control box see UL 1995 section 37 9 29 Haier Commercial Air Conditioner Model cooling only 10SEER UNITS TABLE 8 4 Model Min ampacity Fan motor
65. the system Table Temperature Pressure Chart 39 TEMP TEMP TEMP TEMP Deg R22 DegF R22 Deg F R22 Deg F R22 150 29 4 30 49 35 61 5 100 196 1 140 29 1 25 7 5 40 68 5 105 210 8 130 28 5 20 10 2 45 76 1 110 226 4 120 27 7 15 13 2 50 84 1 115 242 8 110 26 6 10 16 5 55 92 6 120 260 8 100 25 1 5 20 1 60 101 6 125 278 0 90 23 0 0 24 0 65 111 3 130 297 0 80 20 2 5 28 3 70 121 4 135 316 7 70 16 6 10 32 8 75 132 2 140 337 4 60 41 9 15 37 8 80 143 7 145 359 1 50 6 1 20 43 1 85 155 7 150 381 7 40 0 6 25 48 8 90 168 4 35 2 6 30 54 9 95 181 8 Table 10 1 Pump the system down the explained in the previous procedure open the unit disconnect to SHUT Down the system when the suction pressure drops to 3 5 psi positive pressure Front SEAT THE LARGE VAPOR LINE VALVE De energize the compressor REMOVE EACH WIRE FROM THE COMPRESSOR TERMINALS MARK AND IDENTIFY THE WIRE TERMINALS WARNING WRAP A LAYER OF INSULATION ELECTRICAL TAPE OVER THE WIRE TERMINALS NOT THE COMPRESSOR TERMINALS 5 WIRE END IS HOT WITH VOLTAGE DURING THE REMINDER OF THE TEST Energize the system and run the condensing fan Measure the condensing coil 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 refrigerant pressure shown on the h
66. tion can support the weight and that proper consideration is given to the weather tight integrity of the roof The condensing unit contains moving parts and can vibrate Therefore sound is also a consideration in rooftop applications Haier Commercial Air Conditioner Model heat pump 10SEER UNITS WARNING Install the unit securely in a place that can bear the weight of the unit When installed in an insufficiently strong place the unit could fall causing injury 8 4 UNIT CLEARANCES 18 Min Service Access 18 Min Fig 8 1 The minimum clearances for the unit are illustrated in Fig 8 1 Condenser air enters from three sides Air discharges upward from the top of the unit Refrigerant tube and electrical connections are made from the service access area The most common application will find the unit best located about 10 from back wall with connection side facing the wall This application minimizes exposed tubing and wiring minimizing the space for youngsters to run around the unit with subsequent damage to the tubing or wiring In more confined application spaces such as corners provide a minimum of 10 clearance on all air inlet sides For service access to the compressor and control box allow 18 minimum clearance Ensure top is unobstructed If units are to be located under an overhang there should be a minimum of 36 clearance and provision made to deflect the warm discharge air out from the overhang In
67. uns compressor doesn t Run or start capacitor defective Replace Loose connection Check and tighten all connections Compressor stuck grounded or open motor winding open internal overload Wait for 2 hours for overload to reset Replace compressor if still open Low voltage condition At compressor terminals voltage must be within 1096 of rating plate volts when unit is running Low voltage condition Add start kit components compressor runs capacitor defective Replace Condenser fan Loose connection Check and tighten all connections doesn t Fan stuck grounded or open motor Wait for 2 hours for overload to reset winding open internal overload Replace Fan if still open Low voltage condition At compressor terminals voltage must be within 1096 of rating plate volts when unit is running Defective overload protector Replace check for correct voltage Refrigerant undercharge Add refrigerant Register sweat Low evaporator airflow Increase blower speed or reduce restriction replace air filter Restriction in liquid line metering Replace defective components High head Low device or filter drier vapor pressures Flowrator piston size too small Change to correct size piston Incorrect capillary tubes Change coil assembly High head High or Blocked outdoor coil Clear away leaves and other debris Refrigerant overcharge Correct
68. ust be installed with the ignition source at least 18 above the floor level When more than one appliance is installed in a building permanently identify the unit as to the area or space serviced by that applice AIRFLOW ORIENTATION 25 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS Eze Horizontal Right Discharge Tube and Drain conn front SES Downflow discharge with plastic vertical Horizontal Left Discharge pan only Tube and Drain conn front Important Remove the horizontal pan when unit is installed in unconditioned i e Garage Attic application or downflow applications and install insulation kit on vertical donut shape drain pan 57 Upflow Discharge Air Handler is factory ready for Upflow amp Horizontal Right Discharge Application as shown Fig 8 4 HORIZONTAL LEFT HAND INSTRUCTIONS Important Read instructions below carefully Plastic Drain cover _oval gasket gt Fig 8 5 1 With Air handler in the vertical position remove all three access panels 2 Remove J shape metal bracket Slide out from the Air handler cavity the A coil pan assembly with horizontal drain pan on the right side Remove oval gasket from horizontal pan drain and also remove the plastic drain
69. ve water spilling from a roof above the unit Lubrication can be washed out of permanently lubrication causes dirt to stick to oiling ports and can contaminate the bearings If a motor fails replace it with another having the same rotation and 35 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS electrical characteristics CONDENSER FAN BLADE LOCATION Dimension will be from 2 to 4 depending on the unit model number Be sure to check this dimension BEFORE removing the fan blade Note When parts combination results in motor blade interference fan blade should be located to provide 1 8 motor blade clearance RELAYS ELECTRICAL OPERATION Relay coils are wires would around an steel core When energized a coil becomes a magnet opening or closing contactors that makes or breaks electrical circuits Electrical continuity indicates a good coil Relay coils use specific voltage Using the wrong voltage either destroy the relay or it just doesn t operate Avoid this by using the proper replacement part for a failed component Fig 10 4 Relay contacts are switched can become pitted or corroded creating resistance Corrosion can generate enough heat to weld the contacts together Physical examination of the contacts shows this problem With sealed relays use an ohmmeter to show open or closed contacts Fig 10 5 ELECTRICAL CHECKS 1 BESURE ALL THE ELECTRI
70. verify the unit is free of acid 7 Other Check Points Verify the operating voltage is within the specified range Check that all wiring connections are tight and proper Verify that all fuses or circuit breakers are of the proper type Ensure the air conditioning operates properly in cooling Inspect all the other electrical components for proper operation Ensure the thermostat and subbase are correct and operate properly Ensure all ducts and air moving device are sized and operate properly Ensure the refrigerant piping is sized correctly and not pinched Ensure all the system are in correct position rommooms 10 3Troubleshooting Guide WARNING Disconnect all electrical power to the unit before servicing Disconnect power to both the indoor and outdoor units NOTE There may be more than one electrical disconnect switch Failure to shut off power can cause electrical shock resulting in personal injury or death Symptom Possible Cause Remedy Power loose electrical Make sure main switch is ON Check and connection tighten all connections No cooling Incorrect thermostat setting Set thermostat correctly Dirty filters Clean amp replace Indoor air blockage Check supply registers and return grills for blockage Blocked outdoor coil Clear away leaves and other debris Improperly sized unit Recalculate load Insufficient Cooling Improper airflow Check should be 400CFM Ton Incorrect
71. with National Electrical Code and or local ordinances that may apply See unit wiring diagram furnished with this instruction The condensing unit rating plate and the tables of Physical and Electrical Specifications Outdoor Units Table 2 1 and 2 2 provide pertinent data necessary for the selection of proper size electrical service and over current protection devices Table 8 3 provides data on the minimum copper wire size as a function of supply wire length and circuit ampacity 21 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS Copper Wire Size AWG 1 Voltage Drop Supply Circuit Supply Wire Length Ft Ampacity 50 100 150 200 15 14 10 8 6 20 12 8 6 4 25 10 8 6 4 30 10 6 4 4 35 8 6 4 3 40 8 6 4 2 45 6 4 3 2 50 6 4 3 1 Table8 3 Minimum Wire Size Based on N E C for 60 C Type Copper Conductors Below 100 Ampacity The owner should be made familiar with the location of the over current protection the proper size for this application and the proper procedure for disconnecting power service to the unit The condensing unit control wiring requires a 24 Volt minimum 25 VA service from the indoor transformer as shown on the wiring diagram 22 Haier Commercial Air Conditioner Model heat pump 10SEER UNITS 8 9 INDOOR UNIT INSTALLATION UNIT DIMENSIONS a For HB M20 air handler PHYSICAL DIMENSIONS 1 1 1 2
72. zontal applications DET Auxiliary drain pan installed in horizontal applications Auxiliary condensate line installed in horizontal application CAPACITOR ELECTRICAL CHECK WARNING ANY CAPACITOR SHOWING SIGNS OF LEAKS OR BUDGING MUST BE REPLACED IMMEDIATEDLY DO NOT OPERATE THE COMPRESSOR WITH A CAPACITOR SHOWING THESE SIGNS Single phase compressors require a run capacitor connected to the run and start windings This puts the two windings out of phase from one another and allows the compressor motor to start Use a capacitor analyzer to determine if the capacitor dielectric is becoming weak or if the MFD value has changed If a capacitor analyzer is not available use a quality ohmmeter to check the resistance between the capacitor plates 1 Setthe ohmmeter to the highest scale available 2 Discharge the capacitor by shorting the terminals with the blade of a screwdriver having an insulated handle 3 Place the Ohmmeter probes on the capacitor terminals and read A The meter pointer moves towards zero then gradually moves to higher ohm values capacitor is GOOD B The meter pointer does not move An Open capacitor REPLACE C The meter pointer goes toward ZERO ohms and stays A shorted capacitor replace 4 Replace any failed capacitor with a capacitor having the same MFD and voltage rating COMPRESSOR START KITS 34 Commercial Air Conditioner Model heat pump 10SEER UNITS Run capacitor Fig 10 2

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