Haier HR18D2VAR User's Manual
Contents
1. 12 8 Operation 13 9 Miscellaneous 13 9 1 Replacement parts 13 9 2 Troubleshooting guide 13 9 3 Wiring diagram 13 1 INTRODUCTION This manual contains the installation and operating instructions for your new Heat Pump Improper installation can result in unsatisfactory operation or dangerous conditions Carefully read this manual and any instructions packaged with separate equipment required to make up the system prior to installation Give this manual to the owner and explain its provisions The owner should retain this manual for future reference 2 NOMENCLATURE FOR MODEL NUMBER System ype Cr Air conditioner R Heat pump D SEER designation Daise 2 Design series 2 2 Generation v Electric V 208 230 1 60 C 208 230 3 60 D 460 3 60 Y 575 3 60 a Boyse OO RS Reeva ooo S examples mava O 3 SPECIFICATION The dimensions for the condensing unit are illustrated in Figure 1 Physical and electrical specifications are provided in Table 1 for 13 SEER systems respectively The Figure 2 show a s2. OPTIONAL OUTDOOR i i LOW VOLTAGE FACTORY STANDARD i FIELD INSTALLED i OPTIONAL i j USE COPPER CONDUCTORS ONLY i i WARNING CABINET MUST BE PERMANENTLY GROUNDED i li 4 ii i ji F j j AND ALL WIRING TO CONFORM TO I E C N E C C E C d4 i 7 j C L C AND LOCAL CODES AS APPLICABLE i REPLACEMENT WIRE MUST BE THE SAME GAGE AND i INSULATION TYPE AS ORIGINAL WIRE i COMPONENT CODES i BCR BLOWER CONTROL RELAY i BCAP RUN CAPACITOR BLOWER MOTOR i j CC COMPRESSOR CONTACTOR i CCH CRANKCASE HEATER OPTIONAL i i 208 230V 3 S d CHS CRANKCASE HEATER SWITCH OPTIONA GND D CMPR COMPRESSOR f ex r DFC DEFROST CONTROL BOARD i 208 230V i HPS HIGH PRESSURE SWITCH 60Hz 1PH LPS LOW PRESSURE SWITCH i i BM INDOOR BLOWER MOTOR i i i ODS OUTDOOR TEMPERATURE SENSOR i OFM OUTDOOR FAN MOTOR RCAP RUN CAPACITOR COMPRESSOR RVS REVERSING VALVE SOLENOID STCAP START CAPACITOR OPTIONAL STRLY START RELAY OPTIONAL STRTH START THERMISTOR OPTIONAL TRAN TRANSFORMER 230 208 SELECTABLE COLOR CODES BK BLACK BL BLUE GY GRAY BR BROWN GR GREEN OR ORANGE PU PURPLE RD RED VI VIOLET WH WHITE YL YELLOW COMPRESSOR L RESISTANCE HEAT CONTROL LED Flash Codes LED illuminates during unit operation only continuous on 24VAC supplied to Y terminal of defrost control
3. 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 To prevent personal injury wear safety glasses and gloves when handling refrigerant Fully open both shutoff valves 2 Connect service gage manifold to the valve service Ambient Return Air Temperature F ports being sure to evacuate lines Temperature At 65 70 75 85 3 Startup the system Refer to the Section 7 System Condenser Inlet F Fa Vi ial ll Startup Run system at least 10 minutes to allo 6o 17 25 so 33 37 pressure to stabilize PS 3 19 32 35 _ 4 Temporarily install thermometer on suction large mt line near condensing unit Be sure of good contact Ho fir fas 129 between thermometer and line Wrap thermometer with insulating material to assure accurate reading 5 Refer to Table 5 for proper system superheat Add charge to lower superheat Remove charge to raise superheat Carefully remove gage lines Table 5 System charging table by superheat 6 4 ELECTRICAL WIRING WARNING e 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 re
4. 17000 17237 16490 16712 15980 HR24D2VAR HB2400VD1M20 22500 13 900 25425 24683 23850 22500 22162 5 21825 21488 21150 heating Indoor fan ARI data of indoor Heating Capacity with different outdoor temperature Outdoor Indoor speed HR18D2VAR HB2400VD1M20 M 15000 4773 6418 8036 9682 11272 73 13264 15627 18000 fnaanavan apzsoovprnao n 2000 x2 ooo sor esse ions sen smo aries anne fowo Figure 2 Heat Pump Refrigerant Circuit DISCHARGE TEMP SENSOR SERVICE FORT REVERSING VALVE SERVICE VALVE y AN HIGH PRESSURE AN LOW PRESSURE ACCUMULATOR COMPRESSOR SERVICE PORT SERVICE PORT h DEFROSED SENSOR EVAPORATOR gt CONDENSER lt R INDOOR COIL CHECK VALVE ORIFICE DRIER optional CHECK VALVE ORIFICE DISTRIBUTOR SERVICE VALVE DISTRIBUTOR OUTDOOR COIL Heating DISCHARGE TEMP SENSOR SERVICE FORT K REVERSING VALVE SERVICE VALVE Z HIGH PRESSURE SWITGH N LOW PRESSURE ACCUMULATOR COMPRESSOR SERVICE PORT o ERMIOT PORT DEFROSED SENSOR CONDENSER lt EVAPORATOR gt INDOOR COIL OUTDOOR COIL CHECK VALVE CHECK ee ORIFICE ORIFICE DRIER optional DISTRIBUTOR SERVICE VALVE DISTRIBUTOR Warning The Bi flow drier is strongly recommended to be installed by installer and replaced once two years This will give your equipment great help in long life 4 UNIT INSPE
5. defrost cycle connect outdoor W terminal to available 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 15 Made in PR C
6. CTION This product has been inspected at 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 5 EQUIPMENT PROTECTION FROM ENVIRONMENT 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 e Avoid having lawn sprinkler heads spray directly on the unit cabinet e In coastal areas locate the unit on the side of the building away from the waterfront e 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 e Frequent washing of t
7. Flash on off System in defrost operation 2 21 flash Pipe coil sensor open or short circuit 2 22 flash Vent suction sensor short circuit Y2 123 flash LPS amp HPS open circuit 2 24 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 b 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
8. Installation amp Operation Manual Heat Pump 13 SEER 1 5 to 3 0 Ton Models HRI8D2VAR HR24D2VAR HR30D2VAR HR36D2VAR No 0010578573 The information contained in this booklet is subject to change without notice WARNING e 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 e 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 e 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 th
9. be within 10 of rating plate volts when unit is running Low voltage condition Add start kit components Incorrect voltage At compressor terminals voltage must be within 10 of rating Compressor plate volts when unit is running short cycling 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 Replace defective components High head Low metering device or filter drier vapor pressures Change to correct size piston Change coil assembly Clear away leaves and other debris High head High Correct system charge or normal vapor Repair or replace pressures Air non condensibles or Recover refrigerant evacuate amp moisture in system recharge add filter drier Low head High vapor pressures Defective compressor valves Low vapor cool compressor iced Operating below 65_F outdoors evaporator coil High vapor pressure Defective compressor Fluctuating head Air or non condensibles in system Recover refrigerant evacuate amp recharge and vapor pressures Pulsing noise at Air or non condensibles in system Recover refrigerant evacuate amp recharge metering device or liquid line 14 HR18 36D2VAR Heat Pump Wiring Diagram 6010878799 q LINE VOLTAGE i FACTORY STANDARD FIELD INSTALLED l OPTIONAL UNIT l ELECTRIC HEATER KIT l
10. chematic of a heat pump on the cooling cycle and the heating cycle 36D2VAR HRI18 Model Table 1 24 18 789 789 uCExu8 L 9Cxu8 L 97 1LLs9194919 u8 E O xub T PCxub T Yt SZL 789 789 ut T 8Tu8 L 9Txu8 L 9T E894919x 919 u8 L Olxab I Ytxub YT SZL 789 789 cll 8CauS L MC xu8 L 7 E894919 919 uS L xub T VCxub 1 VC SZL 789 789 cil BT xu8 L IT xu L o7 8949194919 u SL 9Csub T PTsub l YT o0zr Ir shl 000e Trl osog 22 LOT 0S62 Z VOI soote s0 6tlub E so 6L b E 7 72 8 L 7S 6 8 OTIT pe a A O OA SOS dH Powy sdury peo pma ooo a C e E a E a ea ae 7s 6 8 SLOT O n D ae 7s 6 8 0001 a V eS a Zs 6 8 0001 O s a EST LOI HdI ZH09 0 7 807 AVATAIEAH AVATAOC AH AVATAPTAH AVATAR TAH TACOW 8 sq 1810M SuIddiyg xorddy 89 SQT 19819M JON HAM ww uy suorsuowq Surddiyg HAM ww uy suorsuowq JON 8 ZO 381219 TZA ww Uy qO aur 10deA ww ug qO eury pinbry Wd eurwon JOO We sduy SuluUNY payooT Jossadwwo09 DAN 2d YOVH WIAA LYO XLN 10 asny XEN sdwy mong wnuwuy ITULA IFLJOA LULION aTeo jddng yun Figure 1 Table 2 System Capacity cooling Indoor fan ARI data of indoor Cooling Capacity with different outdoor temperature Outdoor Indoor speed HR18D2VAR HB2400VD1M20 17000 19210 19197 18020
11. d line sizes for any combination of the unit size and the maximum refrigerant line length Refrigerant Line Length Ft Unit Size 0 24 25 49 50 74 Ton Line Outside Diameter In SEER Table 3 Refrigerant Line Sizing 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 Figure 4 A and Figure 4 B It s 70 when the indoor unit is below the outdoor unit Figure 4 A and 50 when the indoor unit is above the outdoor unit Figure 4 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 Figure 4 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 Heat Pumps are charged with refrigerant Heat Pump 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 s
12. ding construction 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 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 6 2 UNIT CLEARANCES 10 Min Service Access 18 Min Figure 3 The minimum clearances for the unit are illustrated in Figure 3 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 order to have an unrestricted air flow owners should be advised
13. e local EPA office e 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 e 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 e 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 manufactur
14. ed refrigerant from both the high and low side e Message to Owner These instructions should be carefully read and kept near the product for future reference While the instructions are addressed primarily to the installer useful maintenance information is included Have your installer acquaint you with the operating characteristics of the product and periodic maintenance requirements TABLE OF CONTENT 1 Introduction 1 2 Nomenclature for Model Number 1 3 Specification 2 4 Unit Inspection 5 5 Equipment Protection From Environment 5 6 Installation 5 6 1 General 5 6 2 Unit clearances 6 6 3 Refrigerant piping 6 6 4 Electrical wiring 11 7 System Startup
15. er assumes no responsibility for equipment installed in violation of any codes or regulations e The following information should be read carefully prior to installing units with scroll compressors 1 PUMP DOWN PROCEDURE CAUTION Scroll compressors should never be used to evacuate the air conditioning system Vacuums this low can cause internal electrical arcing resulting in a damaged or failed compressor 2 CRANKCASE HEATER Scroll equipped units do not have or do not require a crankcase heater 3 TIME DELAY COMPONENT The time delay is located in the low voltage control circuit When the compressor shuts off due to thermostat operation or a power failure this components keeps the compressor off for at least 30 seconds which allows the system pressure to equalize 4 UNBRAZING SYSTEM COMPONENTS If the refrigerant charge is removed from a scroll equipped unit by bleeding the high side only it is sometimes possible for the scrolls to seal preventing pressure equalization through the compressor This may leave the low side shell and suction line tubing pressurized If a brazing torch is then applied to the low side while the low side shell and suction line contains pressure the pressurized refrigerant and oil mixture could ignite when it escapes and contacts the brazing flame To prevent this occurrence it is important to check both the high and low side with manifold gauge before unbrazing or in the case of repairing a unit on an assembly line ble
16. gulations Incomplete connection or fixing of the wire could result in a fire e 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 or an electric shock due to defective contact defective insulation exceeding the permissible current etc e 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 e 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 with National Electrical Code and or local ordinances that may apply See unit wiring diagram furnished with this instruction Note Some states need the power supply wiring within special tybe be careful to use the waterproof tube when installation the outdoor unit power supply wiring See the figure 5 Figure 5 2 Figure 5 1 The condensing unit rating plate and the tables of Physical and Electrical Specifications Outd
17. he cabinet fan blade and coil with fresh water e Regular cleaning and waxing of the cabinet with good automobile polish e 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 6 INSTALLATION 6 1 GENERAL 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 e Structural strength of supporting members e Clearances and provision for servicing e Power supply and wiring e Location for minimum noise where operating sounds will not disturb owner or neighbors e Location where there is no risk of combustible gas leakage e Location where external water drainage cannot collect around the unit e 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 buil
18. nal overload protector Under some conditions it can take up to 2 hours for this overload to reset Make sure overload has had time to reset before condemning the compressor 9 MISCELLANEOUS 9 1 Replacement Parts Contact your local distributor for a complete parts list 9 2 Troubleshooting Guide Refer to the troubleshooting guide Table 7 included in this manual P14 9 3 Wiring Diagram Refer to the appropriate wiring diagram included in this manual P15 Table 7 Troubleshooting 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 13 Defective four way valve Check the valve coil or replace it Power off or loose electrical connection Make sure main switch is ON Check and tighten all connections Set thermostat correctl No cooling heating Insufficient Cooling eating Incorrect voltage At compressor terminals voltage must be within em Pro eringpisevate une Water on floor or in Run or start capacitor defective Check and tighten all connections Condenser fan runs Compressor stuck grounded or open Wait for 2 hours for overload to reset compressor doesn t motor winding open internal overload Replace compressor if still open Low voltage condition At compressor terminals voltage must
19. oor Units Table 1 provide pertinent data necessary for the selection of proper size electrical service and over current protection devices Table 6 provides data on the minimum copper wire size as a function of supply wire length and circuit ampacity Copper Wire Size AWG 1 Voltage Drop Supply Circuit Supply Wire Length Ft Ampacity 50 100 150 200 P So oo ON oi a o0 co Slr AIAI 00 o0 wl BR BR DID NIwWlopyR RIA 40 45 50 A ON EN ee Table 6 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 7 SSYSTEM 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 The compressor indoor blower and outdoor fan should now be running Make sure cool air is supplied by the unit 6 Turn the fan switch to the Auto po
20. or each unit Table 4 Fixed orifice size outdoor model indoor model orifice size HR18D2VAR HB2400VD1M20 057 HR24D2VAR HB2400VD1M20 065 HR30D2VAR HB3600VD1M22 071 HR36D2VAR HB3600VD1M22 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 When sure of a tight well evacuated system charge with refrigerant 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
21. ow the strapping to directly contact the tubing Use a closed cell insulation to separate the strapping from the tubing e Do not kink or twist the tubing e Refrigerant piping should not be installed in a cement slab as this limits access to the refrigerant should a leak be suspected e 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 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 Armflex 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 tuing 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 prevent 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 undesirable heat transfer resulting in capacity loss and increased power consumption 7 Refrigerant Line Sizing Check the following table Table 3 for correct suction and liqui
22. sition The blower should stop 90 seconds later 7 Turn system switch to Heat and fan switch to Auto 8 Slowly raise the heating temperature setting The compressor indoor blower and outdoor fan should now be running 9 If unit operates properly on the heating cycle raise the heating temperature setting high enough 10 For thermostats with emergency heat switch return to startup 12 11 If checking the unit on the heating cycle in the wintertime when the outdoor coil is cold enough to actuate the defrost control observe at least one defrost cycle to make sure the unit defrosts properly 12 Check the refrigerant charge see Instructions under Charging the System 13 Replace service port caps Service port cores are for system access only and will leak if not tightly capped 14 Check unit for tubing and sheet metal rattles 15 Instruct the owner on operation and maintenance Leave this Installation and Operating Manual and the Use and Care Manual with owner 8 OPERATION Most single phase units are operated without start relay or start capacitor Such systems should be off for a minimum of 5 minutes before restarting to allow equalization of pressures The thermostat should not be moved to cycle unit without waiting 5 minutes To do so may cause the compressor to stop on an automatic open overload device or blow a fuse Poor electrical service can cause nuisance tripping in overloads or blow fuses The compressor has an inter
23. tem out of the valve body and possibly cause personal injury CAUTION The piston is in the accessory bag Don t forget to take it out and put into the indoor liquid pipe orifice 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 stop valves at the outdoor unit are closed 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 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 ckeck 9 Do not purge the lines with refrigerant Evacuate the lines and indoor coil Refrigerant Metering Devices Replace the existing indoor unit fixed orifice with the orifice supplied with the outdoor unit See table 4 for the fixed orifice size f
24. to avoid lawn mower discharge toward the unit depositing debris on the fin coil surface reducing the unit efficiency 6 3 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 OUTDOOR UNIT ADDITIONAL SUCTION LINE PITCH SUCTION LINE TOWARD OUTDOOR UNIT 1 2 FRO EVERY 10 OF LINE OIL TRAP FOR EACH 20 FOOT RISE OF PIPE INDOOR UNIT ABOVE OR LEVEL TO OUTDOOR UNIT 70 LIQUID LINE OUTDOOR UNIT MAX SUCTION LINE OIL INDOOR UNIT A SHORE TRAP WHEN INDOOR UNIT IS 4 FEET OR LIQUID LINE MORE BELOW A OUTDOOR UNIT INDOOR UNIT BELOW OUTDOOR UNIT B 1 INVERTED LOOP LIQUID LINE N INDOOR UNIT OUTDOOR UNIT MAX M SUCTION LINE B 2 Figure 4 e 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 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 e Refrigerant lines must be adequately supported If metal strapping is used to secure the tubing do not all
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