Carrier 38QRR018300 User Manual HEAT PUMP Manuals And Guides 1008629L
User Manual: Carrier 38QRR018300 38QRR018300 CARRIER HEAT PUMP - Manuals and Guides View the owners manual for your CARRIER HEAT PUMP #38QRR018300. Home:Heating & Cooling Parts:Carrier Parts:Carrier HEAT PUMP Manual
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to the expe_ Installation Instructions SAFETY Improper installation, CONSIDERATIONS adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual packaged with the kits or accessories when installing. instructions Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and the current NFPA70. A07532 Fig. 1 - 38QRR the National In Canada, refer to the current Code CSA C22.1. editions Recognize NOTE: Read installation. the entire TABLE instruction manual before starting the OF CONTENTS CONSIDERATIONS INSTALLATION Complete Rig and Mount SERVICE Unit Refrigerant Make Electrical START-UP 1 ................................. Pre-Installation Complete ........................ Checks 2-3 ................... 2 .............................. Piping Connections Connections 2 ............. 4 5 ................................... ........................... Code of the Canadian This is the safety-alert (NEC) Electrical symbol /_. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal iniury. Understand the signal words DANGER, WARNING, and CAUTION. These or death. WARNING signifies hazards which could result in personal iniury or death. CAUTION is used to identify unsafe practices which may result in minor personal iniury or product and property damage. NOTE is used will result in enhanced installation, to highlight suggestions reliability, or operation. which 3 ......................................... TROUBLESHOOTING safety information. Electrical 3 ........................ ........................................ MAINTENANCE of words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal iniury PAGE SAFETY editions 7 9-10 ELECTRICAL SHOCK HAZARD Failure to follow or death. this warning could result in personal iniury Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label. ENVIRONMENTAL Failure to follow pollution. HAZARD this caution may result in environmental Remove and recycle all components or materials refrigerant, etc.) before unit final disposal. (i.e. oil, INSTALLATION After system section installation is complete, in this document to check see the Refrigerant and/or Charging acliust refrigerant charge. HEATING CAP UNIT OPERATION AND SAFETY Failure to follow this warning or equipment damage. FLARE HAZARD could result in personal iniury ONNECTOR HETERED Puron (R-410A) refrigerant systems operate at higher pressures than standard R-22 systems. Do not use R-22 service equipment or components on Puron refrigerant equipment. A07407 Fig. 2 - AccuRater Metering RIG PERSONAL HAZARD INJURY AND EQUIPMENT Failure to follow this caution and / or equipment damage. DO NOT removed. operate without a filter Mounting PRE-INSTALLATION CHECKS System Consult local if shipment is damaged or to ensure units match job codes and NEC for special sufficient space for airflow piping, and servicing unit. Locate unrestricted on both sides. clearance, wiring, Unit may be mounted on a level pad directly mounted on raised pads at support points. Matching the Heat Pump to an Indoor on base legs or Unit and residential fan coils and evaporator indoor unit literature for more information. Device - Ducted System IMPORTANT: coils. Refer installing single or nmltiple enclosed area, ram) n_ininmm clearance on ram) n_ininmm clearance on units into units in an alcove, there of discharge so discharge nmltiple one unit is not drawn ensure clearance clearance is adequate of one units, ensure another unit. the When roof well or partially ventilation to prevent air. Ambient Minimum (13°C), Cooling 8" (203.2 installing air from Operating to separate When discharge recirculation The 38QRR heat pump units can be matched to corresponding indoor units. The 38QRR unit can be matched with under-ceiling Expansion With coil facing walk Allow 6" (152.4 ram) minimum on coil side and coil end and 36" (914.4 ram) minimum on compressor end and fan side With multi-unit application: Arrange does not enter inlet of another. is ram) Requirements refrigerant airflow temperatures feet. installation unit so that condenser subfreezing unit be fastened to a pad, 6 be used and fastened through fan side and coil end and 36" (914.4 compressor end and coil side. requirements. Allow in unit mounting With fan facing wall: Allow Requirements building prolonged on Roof Clearance requirements. Consider UNIT Mount unit on a level platform or frame at least 6 in. (152.4 above roof surface. Isolate unit and tubing from structure. being Shipment File a claim with the shipping company incomplete. Check the unit nameplates Components or local codes require tie-down bolts should slots provided carton, type) on Ground Mounting Move the unit to final location. Remove unit from careful not to damage service valves and grilles. Device snow stand or ice rack where or heavy snow occurs. grille Unit Inspect MOUNT (bypass Mount unit on a solid, level concrete pad. Position unit so water or ice from roof does not fall directly onto unit. Use field-provided iniury or with AND If conditions field-supplied COMPLETE Unpack the unit DAMAGE may result in personal FLOW HEATING outdoor naaxinmm operating 125°F ambient in cooling mode is 55°F (52°C). Mode A hard shutoff, thermostatic expansion valve (TXV) is required at the indoor section of the system for proper operation of these products. If the indoor section of the system is not equipped with a hard shutoff TXV, refer to Spec Sheet for the correct TXV kit to be installed. Follow the instructions in the kit for proper installation. Expansion Device A piston is 40QAQ018-048 unit instructions Check AccuRater The correct for system - Duct used as under-ceiling for details. Metering AccuRater capacity field-replaceable Free System the metering indoor Device Cooling device unit. - Heating Mode when Refer installing to the indoor Mode (bypass type) refrigerant control is required optimization. An AccuRater device with piston is supplied with the outdoor unit (see Fig. 2). AND/OR Failure to follow and/or equipment may result refrigerant are included lines. See Fig. 2. Piston in the indoor unit installation replacement instructions. this caution damage. Be sure unit panels are securely EQUIPMENT in personal injury in place prior to rigging. Keep the unit upright and lift unit using a sling. Use cardboard or padding under the sling, and spreader bars to prevent sling damage to the unit. See Fig. 3. Install the unit so that the coil does not face into prevailing winds. If this is not possible and constant winds above 25 mph are expected, use accessory wind baffle. See installation Do not interchange components between the AccuRater device types. Matching of outdoor unit with indoor unit may require field replacement of piston. Replace piston, if required, before connecting instructions a PERSONAL INJURY DAMAGE HAZARD NOTE: accessory instructions Accessory low ambient Field-fabricated provided wind with the accessory baffles temperature snow or ice stands should kit. be used on all units with control. may be used to raise unit when operation will be required during winter months. wall mounted using the accessory wall mounting Units may also be kit. SLING PADDING COMPRESSOR END CENTER OF GRAVITY A05227 Fig. 4 - Filter Drier Components A07396 Fig. 3 - Lifting Unit with COMPLETE REFRIGERANT CONNECTIONS The filter drier nmst be replaced is exposed to the atmosphere. Sling Only use factory working pressures PIPING Outdoor units may be connected to indoor units using field-supplied tubing of refrigerant grade and condition. See Product Data for correct line sizes. Do not use less than 10 ft (3.05 m) of interconnecting tubing. UNIT DAMAGE NOTE: whenever specified liquid-line less than 600 psig. Do not install a suction-line Make Piping Remove Sweat plastic the refrigeration filter driers system with rated filter drier in liquid line. Connections caps from liquid refrigerant grade tubing. Service and are ready for brazing. After and suction service valves. Use valves are closed from the factory wrapping the service valve with a wet cloth, the tubing set can be brazed to the service valve using either silver bearing or non-silver bearing brazing material. Consult local code requirements. Refrigerant tubing and the indoor HAZARD coil are now ready for leak testing. Failure damage to follow or improper this caution operation. may result in equipment If any section of pipe is buried, there nmst be a 6 in. (152.4 ram) vertical rise to the valve connections on the outdoor unit. If more than the recommended length is buried, refrigerant may nfigrate to cooler, buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at Pass nitrogen )revent When more than 80 fl (24.4 m) of interconnecting tubing and more than 20 ft (6.1 m) of vertical lift is used, consult the residential Long Line Application Guide for required accessories. If either refrigerant tubing or indoor coil is exposed to the atmosphere, the nmst be evacuated Run refrigerant tubes following as directly good refrigeration as possible, avoiding or other formation UNIT start-up. system NOTE: Unit is shipped with Puron charge indicated on nameplate. gas through damage practices. • Use a brazing unnecessary • Wrap service factory piping while brazing result in equipment to HAZARD to follow this caution or improper operation. To prevent following: refrigerant of copper oxide. DAMAGE Failure damage inert (R-410A) may to unit or service valves observe the shield. valves with wet cloth or use a heat sink turns and bends. Suspend refrigerant tubes so they do not damage insulation on vapor tube and do not transnfit vibration to structure. Also, when passing refrigerant tubes through a wall, seal the Provide Safety Relief opening so that vibration is not transnfitted to structure. Leave some slack in refrigerant tubes between structure and outdoor unit A fusible plug is located in unit suction line; do not cap this plug. If local code requires additional safety devices, install as directed. to absorb instructions MAKE Filter vibration. Refer to separate for additional information. indoor unit installation material. ELECTRICAL CONNECTIONS Drier Refer to Fig. 4 and install filter drier as follows: 1. Braze 5 in. (127 ram) liquid tube to the indoor 2. Wrap filter drier with damp cloth. 3. Braze filter drier to 5 in. (127 ram) coil. long liquid tube from step 1. 4. Connect and braze liquid refrigerant tube to the filter drier. ELECTRICAL SHOCK Failure death. this warning to follow HAZARD could result in personal iniury or The unit cabinet must have an uninterrupted or unbroken ground to nfininfize personal iniury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. through opening in unit side panel to connection in unit control box. m UNITDAMAGE HAZARD Failure to follow this caution may damage or improper COHHON (C)--BLK --_ -- -- -- -- -_ -- -- -'_ -- -- (M2)--WHT,.._ result in equipment COOL operation. (Y)--YEL 24VAC (R)--RED REQUIRED HEAT (O)--ORG Unit failure as a result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would void any applicable Carrier warranty. (REV, {Zg "_ VALVE) 24VAC SUPPLY REQUIRED FIELD SUPPLIE T'STAT WIRE OUTDOOR UNIT INDOOR UNIT LOW VOLTAGE CONNECT[0N5 A07429 Fig. 6 - 38QRR ELECTRICALSHOCK HAZARD NOTE: Use minimum) wire. If thermostat No. Failure to follow this warning could result in personal iniury or from unit, as measured death. AWG Before performing service or maintenance, main power switch is turned OFF and stopped. Power be sure indoor indoor blower unit has accessible, shown within but out of reach of children. on nameplate. Provide sight from unit, readily Provision switch open (off) is advisable to prevent on while unit is being serviced. power for locking the from being turned Disconnect switch, fuses, and field wiring must comply with the NEC and local code requirements. Use copper wire only between the disconnect switch and unit. Use minimum 75 C wire for the field power AWG along Operating (35°C line voltage may use No. 16 drop. and local codes. See Product voltage wires, voltage constitutes abuse Data. Do not install fluctuate above or below limits. to the making warranty. where insulated voltage to NEC unit on improper in a system Refer color-coded, the control NOTE: affect Carrier Connections is located more than 100 ft. (30.5 m) All wiring must conform permissible Circuit wire to avoid excessive Product electrical refrigerant piping Data for recommended connections, provide fuse clearance sizes. When at the unit for connections. NOTE: The 38QRR units use the control with the matched indoor unit. transformer supplied START-UP PRELIMINARY connection. 18 Control NOTE: unit Unit is factory wired for voltage adequate, fused disconnect switch color-coded and could Wiring Typical CHECKS Route power wires through the opening in unit side panel and connect in the unit control box as shown on the unit label diagram 1. Check that all internal wiring connections are tight and that all barriers, covers, and panels are in place. and Fig. 5. Unit must be grounded. 2. Field electrical power source must agree with unit nameplate rating. - .... _NcNi_NTOEc GROUND LEAD - GROUNDING T SINGLE-PHASE[_ PER NEC 3. All service valves must be open. 4. Belly-band crankcase heater must be tight on compressor crankcase for those units with belly-band heaters. EVACUATE AND DEHYDRATE LUG BLK -- / BLK-- I SIngLE'-PHASE UN,f Field piping and fan coil must be evacuated CHARGE SYSTEM Release suction BLK -3-PHASE CONN, TO DISCONNECT PER NEC TB ..... GROUND LEAD -_ _] GROUNDING Be sure LUG 3-PHASE UNIT check LEGEND --O .... National Electrical Terminal Board Code A07428 Fig. 5 - Line Control Circuit Power Connections Wiring Control voltage is 24 v (40 va minimum). See Fig. 6 and unit label diagram for field-supplied wiring details. Route control wire UNIT that the field ambient disconnect temperature. system refrigerant NOTE: When start-up instructions procedures. TB Connections Field Wiring Factory Wiring liquid line. START below NEC TB charge into system by opening (backseating) liquid and line service valves. Outdoor unit is charged for 15 ft (4.6 m) of 3/8-in. TO and dehydrated. is closed. Operate charge. Set room for 15 See Refrigerant using in coniunction included unit with Charging with 40QA fan coil thermostat minutes, fan coils, for correct then section. refer to start-up SERVICE UNIT ELECTRICALSHOCK Failure to follow or death. HAZARD this warning could result in personal The unit coils hold only the factorydesignated amount of refrigerant. Additional refrigerant may cause units to relieve pressure through the compressor internal pressure relief valve (indicated by a sudden rise of suction pressure) before suction pressure reaches 20 psig. If this occurs, shut off unit immediately then frontseat the suction valve and remove and recover excess refrigerant following accepted practices Fan A reinforced wire mount holds the outdoor fan position. See Fig. 7 for proper mounting position. II i i " _,,,,_ assembly in 3. Start unit and run until suction 4. Shut unit off and frontseat High-Pressure OUTSIDEEDGE OF GRILLE pressure suction 5. De-pressurize low side of unit lowing accepted practices. FAN BLADE I OUTSIDEEDGE OF FAN DECK HAZARD injury Before installing, modifying, or servicing system, main electrical disconnect switch nmst be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label. Outdoor DAMAGE Failure to follow this caution may result in equipment damage or improper operation. DIMENSION FROM OUTSIDE TOP EDGEOF BLADETO OUTSIDE EDGE OF FAN DECK.SEETABLE BELOW reaches 20 psig. valve. and recover refrigerant fol- Switch The high-pressure switch, located against high discharge pressures on discharge line, protects caused by such events as overcharge, condenser-fan motor failure, system restriction, etc. It opens on pressure rise at about 650 -+ 10 psig. If system pressures go above this setting during abnormal conditions, the switch opens. 38QRR Unit Size, in. (mm) 018,024 030,036 048,060 0.433 (11.00) 0 0 A07401 Fig. 7 - Condenser High-Pressure Current in the compressor. The of approximately 550 to (low side) and discharge automatically Sensitive when Overload internal pressure compressor temperature drops to a safe level (overloads may require nfinutes to reset). When an internal overload is suspected open, check by using an ohmmeter or continuity tester. Pumpdown (high side) DO NOT abnormalities hazard. motor up to 45 of being Procedure Crankcase on the Failure damage DAMAGE may Never open system to atmosphere 2. Frontseat gage to suction the liquid/nfixed result in while it is under When system nmst be opened for service, vacuum with dry nitrogen before opening pressure to simulate pressures pose is checked these system a serious safety with 625 psig switch shows in personal an ohmmeter. If system continuity. both compressor service valves nmst be closed. The crankcase heater is powered by the high-voltage power of the unit. It is connected across the line side of the contactor and is controlled. HAZARD to follow this caution or improper operation. 1. Attach result Heater thermostatically UNIT could The crankcase heater prevents refrigerant migration and compressor oil dilution during shutdown when compressor is not operating. If the crankcase heater is de-energized for more than 6 hours, The system may be pumped down in order to make repairs low side without losing complete refrigerant charge. switch is below HAZARD this warning attempt - high The high-pressure and Temperature resets INJURY Failure to follow injury or death. relief valve is located at a pressure differential 625 - 50 psig between suction to allow pressure equalization. The control PERSONAL Positions Relief Valve The high-pressure relief valve opens Internal Fan Mounting phase equipment PERSONAL a vacuum. Failure to follow or death. recover refrigerant, system. service break valve gage port. line valve. INJURY HAZARD this warning could result in personal Use extreme caution when troubleshooting line voltage is continually present. injury this device as To troubleshoot: 1. Apply voltmeter across crankcase heater leads to see if heat- er voltage is on. Do not touch heater. Carefully feel area around crankcase heater; if warm, crankcase heater is functioning. 2. With power off and heater leads disconnected, check across leads with ohmmeter. Do not look for a specific resistance reading. Check for resistance or an open circuit, and change heater if an open circuit is detected. Service Valves FROM TO OUTDOOR TO ACCUMULATOR INDOOR SERVICE COIL VALVE VIA ON The service valves in the outdoor unit come from the factory frontseated. This means the refrigerant charge is isolated from the line-set connection ports. To prevent damage to the valve, use a wet cloth brazing. or other accepted heat sink material on the valve before The service valve cannot be field repaired, therefore, only a complete valve or valve stem seal and service port caps are available for replacement. Defrost The LEGEND TP -- Test Point Controls control, which consists of defrost control board and defrost A07433 thermostat, interrupts the normal system heating operation to defrost the outdoor coil, if the coil saturated suction temperature indicates freezing temperatures. set to check need for defrost Defrost control every 30, 50, Fig. 8 (Cooling board can be field or 90 minutes of Mode Reversing or Defrost FROM OUTDOOR COIL operating time, by connecting the jumper (labeled Wl, on the circuit board) to the spade terminal for the defrost time desired. The board is factory set for 90 minutes. The defrost period is field Mode, Valve Solenoid TO ACCUMULATOR INSULATE FOR ACCURATE READING TP'3 TP-4 Energized) TO INOOOR COIL VIA SERVICE VALVE ON OUTDOOR COIL TP-2 selectable, depending upon geographic areas and defrost demands. Control board has additional feature that allows unit to restart in defrost control cycle if room simultaneously solenoid to return condenser, indoor electric heater. thermostat is satisfied during tops outdoor fan, energizes system to cooling unit as evaporator), defrost. Defrost reversing valve INSULATE FOR ACCURATE READING cycle (outdoor unit as and activates accessory FROM ELECTRON IC A07434 defrosting before 10 minutes have elapsed. When is terminated, the outdoor-fan motor is energized, and reversing cycle. valve Reversing LINE LEGEND TP -- Test Point The defrost timer limits defrosting period to 10 minutes. Normally, the frost is removed and the defrost thermostat contacts open to terminate defrosting COMPRESSOR DISCHARGE solenoid is de-energized, returning Fig. 9 (Heating unit to heating Refrigerant Valve Reversing Mode, Solenoid Valve De-energized) Char_in_ In heat pumps, changeover between heating and cooling modes is accomplished with a valve that reverses flow of refrigerant in the system. The reversing valve solenoid can be checked with the power off using an ohmmeter. ground. voltage With unit operating, condensate Using Check for continuity PERSONAL INJURY DAMAGE HAZARD AND/OR Failure to follow and/or equipment could such as frost or and Wear safety glasses Do not overcharge flooding. and shorting to With control circuit (24 v) power on, check for correct at solenoid coil, and for burned or overheated solenoid. other on refrigerant a remote items can be checked, lines. measuring device, check inlet temperatures. Do not touch lines. If reversing valve normally, inlet and outlet temperatures on appropriate outlet line is operating lines should this warning damage. EQUIPMENT result in personal and gloves when handling system - this can cause iniury refrigerant. compressor be similar. Any temperature difference would be due to heat loss or gain across valve body. Temperatures are best checked with a remote reading electronic-type thermometer with multiple probes. Figures 8 and 9 show test points on reversing valve for recording temperatures. Insulate points for more accurate reading. If valve is defective: 1. Shut off all power to unit. 2. Remove all charge from system. 3. Remove valve using a tubing cutter. 4. Install new valve (wrap valve overheating while brazing). 5. After valve is brazed with a wet rag to prevent in, check for leaks. 6. Evacuate and charge system. Operate system in both modes several times to be sure valve functions properly. PERSONAL INJURY DAMAGE HAZARD AND/OR Failure to follow and/or equipment could this warning damage. EQUIPMENT result in personal iniury Service valves must be fully backseated to close service port. There is no Schrader valve at the service port, and failure to backseat the valve could result in loss of system charge or personal iniury. NOTE: Do atmosphere. not Remove vent or de-pressurize and recover refrigerant unit refrigerant following to accepted practices. All units nameplate. Refer are shipped to Product with Puron • the refrigerant Data and consider (R-410A) Puron with charge the following refrigerant: refrigerant cylinders are rose colored. listed when on the working • Recovery cylinder service psig, DOT (Department DOT BW400. • pressure rating must of Transportation) be 400 4BA400 or Puron systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose when charging into suction line with compressor operating. • Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low-side retard, • Use hoses with 700 psig service pressure rating. • Puron refrigerant, as with other HFCs, is only compatible with POE oils. • Vacuum pumps will not remove moisture from oil. • Polyol Ester oils absorb moisture rapidly, Do not expose oil to atmosphere, length above or below 15 ft (4.6 m) only. Charge level should then be appropriate for the system to achieve rated capacity. The charge level could then be checked at another time when the both indoor and outdoor Polyol Ester oils may cause damage to certain plastics and roofing materials, • Wrap all filter driers and service valves with wet cloth when brazing. • factory approved, liquid-line filter drier is required on every unit, charging Units Check To check Chart system Procedure operation - Heating during installed Pistons with indoor pistons require unit a minimum of charging is valid 10 nfinutes 2. Measure suction pressure by attaching suction valve service port. by the when indoor before checking an accurate gauge to 3. Measure suction temperature by attaching an accurate thernfistor type or electronic thernmmeter to suction line at service valve. 4. Measure outdoor thernmmeter. air dry-bulb temperature 5. Measure indoor air (entering indoor temperature with a sling psychrometer. coil) with wet-bulb 6. Refer to Table 1. Find outdoor temperature and evaporator entering air wet-bulb temperature. At this intersection, note superheat. 7. Refer to Table 2. Find superheat temperature located in item 6 and suction pressure. At this intersection, note suction line Mode heating range. requirements. with Indoor 1. Operate charge. If using a suction line drier, do not leave in place for more than 72 hours, Heating are in a more favorable superheat method. The following procedure airflow is within ---21% of its rated CFM. Do not use a TXV (thermostatic expansion valve) designed for use with R-22 refrigerant. Refer to separate indoor unit installation instructions for more details, • temperatures NOTE: If line length is beyond 80 ft (24.4 m) or greater than 20 ft (6 m) vertical separation, See Long Line Guideline for special Units • • If the indoor temperature is below 70°F (21°C), or the outdoor temperature is not in the favorable range, adjust charge for line set temperature. cycle, refer to the Heating check Chart on outdoor unit. This chart indicates whether a correct relationship exists between system operating pressure and 8. If unit has a higher suction temperature, add refrigerant reached. line temperature than charted until charted temperature is air temperature entering indoor and outdoor units. If pressure and temperature do not match on chart, system refrigerant charge may 9. If unit line not be correct. NOTE: Do not use chart to adjust When charging nmst be weighed 3/8-in. liquid To calculate is necessary in accordance line above additional refrigerant during heating charge. season, or below 25 ft. (7.6 m) respectively. for a 35-ft. (11 m) line set: 35 ft. (10.6 m) - 25 ft. (7.6 m) = 10 ft. X 0.6 oz./ft. additional charge. CHECK CHARGE METERING - UNITS WITH TXV reclaim suction refrigerant temperature than charted until charted temperature is charge with unit rating plate ---0.6 oz./ft, of charge required has a lower temperature, reached. = 6 oz. of 10. When adding refrigerant, charge in liquid form into suction service port using a flow-restricting device. 11. If outdoor air temperature or pressure at suction valve changes, charge to new suction line temperature indicated on chart. COOLING MAINTENANCE DEVICE Factory charge amount and desired subcooling are shown on unit rating plate. Charging method is shown on information plate inside unit. To favorable properly check for subcooling or adjust charging. charge, conditions must be Favorable conditions exist ELECTRICAL SHOCK HAZARD when the outdoor temperature is between 70°F and 100°F (21°C and 38°C), and the indoor temperature is between 70°F and 80°F Failure to follow injury or death. (21°C Before installing, modifying, or servicing electrical disconnect switch must be and 27°C). Follow Unit is factory charged by adding or removing the procedure below: for 15 ft (4.6 m) of line-set. Adjust charge 0.6 oz/ft of 3/8 liquid line above or below For standard refrigerant line lengths (80 ft/24 m or less), allow system to operate in cooling mode at least 15 nfinutes. If conditions are favorable, check system charge by subcooling method. If any adjust charge slowly and allow system to to stabilize before declaring a properly If the indoor temperature is above 80°F (27°C), and the outdoor temperature is in the favorable range, adjust system charge by weight based There may be more could result on line length and allow drop to 80°F (27°C) before attempting subcooling method as described above. the indoor temperature to check system charge to by in personal system, in the than 1 disconnect Lock out and tag switch with a suitable 15 ft (4.6 m) respectively. adjustment is necessary, operate for 15 nfinutes charged system. position. this warning warning main OFF switch. label. LUBRICATION Compressor Compressor contains factory Mobile 3MA-POE oil. CLEANING COILS Coil be should washed oil charge; out with replace water or oil when blown lost. Use out with compressor air. Note that the blow-thru design causes dirt and debris to build up on the inside of the coils. Clean coil annually or as required by location and outdoor air conditions. Inspect coil monthly and clean as required. Fins are not continuous through coilsections. Dirt anddebrismaypassthrough firstsection, become trapped between therowof finsandrestrict condenser airflow. Useaflashlight todetermine if dirtordebris hascollected between coilsections. Clean coilasfollows: 1.Turnoffunitpower. 2.Using agarden hose orother suitable equipment, flushcoil fromtheoutside toremove dirt.Besure toflushalldirtand debris fromdrainholes inbase ofunit.Fanmotors arewaterproof. Table 1--Superheat Charging OUTDOOR TEMP °F (° C) 55 EVAPORATOR (13) 60 (16) 65 (18) 70 (21) 75 ENTERING AIR TEMPERATURE ° F (° C) WB 50 (10) 9 52 (11) 12 54 (12) 14 56 (13) 17 58 (14) 20 60 (16) 23 62 (17) 26 64 (18) 29 66 (19) 32 68 (20) 35 70 (21) 37 72 (22) 40 74 (23) 42 76 (24) 45 (-13) 7 (-14) (-11) 10 (-12) 6 (-14) (-10) 12 (-11) 10 (-12) 7 (-14) (-8) 15 (-9) 13 (-11) 10 (-12) 6 (-7) 18 (-8) 16 (-9) 13 (-11) 9 (-5) 21 (-6) 19 (-7) 16 (-9) 12 (-3) 24 (-4) 21 (-6) 19 (-7) 15 (-2) 27 (-3) 24 (-4) 21 (-6) 18 (0) 30 (-1) 27 (-3) 24 (-4) 21 (2) 33 (1) 30 (-1) 27 (-3) 24 (3) 35 (2) 33 (1) 30 (-1) 28 (4) 38 (3) 36 (2) 33 (1) 31 (6) 40 (4) 38 (3) 36 (2) 34 (7) 43 (6) 41 (5) 39 (4) 37 (-14) (-13) 5 (-11) 8 (-9) 12 (-8) 15 (-6) 18 (-4) 21 (-2) 25 (-1) 28 (1) 31 (3) 35 (-15) (-13) (-11) 8 (-13) 5 (-15) (-9) 11 (-12) 9 (-13) 6 (-8) 15 (-9) 13 (-11) 10 (-6) 19 (-7) 16 (-9) 14 (-4) 22 (-6) 20 (-7) 18 (-2) 26 (-3) 24 (-4) 22 (-1) 30 (-1) 27 (-3) 25 (2) 33 (1) 31 (-1) 29 (-14) (-12) 8 (-10) 12 (-8) 15 (-6) 20 (-4) 23 (-2) 27 (-13) 5 (-15) (-11) 9 (-13) 6 (-14) (-9) 13 (-11) 11 (-12) 8 (-7) 17 (-8) 15 (-9) 14 (-5) 22 (-6) 20 (-7) 18 (-3) 26 (-3) 25 (-4) 23 (24) 80 (27) 85 (29) 90 (32) 95 (36) 100 (38) 105 (41) 110 (43) 115 (47) Where a dash (-) appears, do not attempt to charge system under these conditions NOTE: Superheat °F (°C) is at low-side service port. Table SUPERHEAT 2--Required SUCTION TEMP(°F/°C) 107,8 0/- 18 35 2/- 17 4/- 112,2 or refrigerant slugging Suction-Line PRESSURE (- 5) Temperature AT SERVICE 126,0 (- 13) (- 10) (- 8) may occur. Charge must be weight in. PORT 130,8 (PSIG) 116,8 121,2 37 39 41 46 45 138,8 47 140,8 49 145,8 51 37 39 41 43 45 47 49 51 56 16 39 41 46 45 47 49 51 56 55 6/- 14 41 46 45 47 49 51 56 55 57 8/- 16 46 45 47 49 51 56 55 57 59 10/- 12 45 47 49 51 56 55 57 59 61 12/- 11 47 49 51 56 55 57 59 61 66 14/- 10 49 51 56 55 57 59 61 66 65 16/- 9 51 56 55 57 59 61 63 65 67 18/- 8 56 55 57 59 61 63 65 67 69 20/- 7 55 57 59 61 66 65 67 69 71 22/- 6 57 59 61 63 65 67 69 71 73 24/- 4 59 61 66 65 67 69 71 76 75 26/- 3 61 63 65 67 69 71 73 75 77 28/- 2 66 65 67 69 71 76 75 77 79 30/- 1 65 67 69 71 76 75 77 79 81 32/0 67 69 71 76 75 77 79 81 86 34/1 69 71 76 75 77 79 81 86 85 36/2 71 76 75 77 79 81 86 85 87 38/3 73 75 77 79 81 83 85 87 89 40/4 75 77 79 81 86 85 87 89 91 TROUBLESHOOTING NO HEATING OR INSUFFICIENT HEATING COMPRESSOR WILL NOT RUN 1 CONTACT -_[ OPEN T I [ RUNS INSUFFICIENT COMPRESSOR HEATING RUNS BUT CYCLES ON INTERNAL COMPRESSOR OVERLOAD -- ] [ _'_" CONTADTOR CLOSED VOLTAGE .._ _._ _. DEFECTIVE TRANSFORMER LOW- POWER SUPPLY OMPRESSOR OPEN COIL OPEN OR CONTACTOR SHORTED _[ LOOSE COMPRESSOR LEADS AT OPENIN[_OR THERMOSTAT _[ FAULTY START GEAR (1PH) PRESSURE SWITCH LIQUID-LINE OPEN •"_ COMPRESSOR STUCK _[ DIRTY FILTERS OR INDOOR COtL l -- RESTRICTION LINE tN DISCHARGE _.{_ OR NONCONDENSABLES OVERCHARGE IN SYSTEM OF CHARGE ._ _[ LOOSE LEADS AT FAN MOTOR FAN MOIOR BURNED OUT l .__[ _{ _[ _{ OPENCIRCUIT CONTROL ] OR GROUNDED .__'OPEN,COMPRESSOR SHORTED' MOTOR t "_ 1 | OUTDOOR PAN LOOSE MOTOR LEADS AT 1 FAN MOTOR OVERLOAD INTERNAL OPEN BURNED FAN MOTOR OUT i REFRIGERANT CHARGE OVERLOAD COMPRESSOR OPEN ,_[ OUTDOOR RUNNING FAN REVERSING VALVE STUCK DOT SETTING TOO LOW _[ RESTRICTED LIQUID LINE CAP TUBE PINCHED OR BULB NOT SENSING TRUE OUTDOOR TEMP _[ PISTON _RESTRICTED ACCURATER® OR CLOGGED NC CONTACTS OPEN ON CIRCUIT DEFROST RELAY BOARD TOO HIGH OR UNE LOW VOLTAGE _[ CAPACITOR DEPBDTIVB (1 -PH) RUN '_ OUTDOOR DIRTY COIL RELAY OR CONTACTOR STRIP HEATER DEFECTIVE _[ UNDER* CHARGED WtNOtN_S__J DEFECTIVE CAPACITORRUN POWER CIRCUIT TO HEATER _ENTS OPENINGIN 1 RESTRICTED STRAINER -_ OUTDOOR COIL HEAVtLY FROSTED BEARINGS COMPRESSOR FAULTY CONTACTS WELDED CLOSED IN FANDEFROST MOTOR RELAY CONDmON HIGH*LOAD VALVE JAMMED tN MIDPOSITION _[ t BRGKEN ELEMENT HEATER ] ] J __[ TEMPERATURE OPEN OVERTHERMOSTAT -DEFECTIVE DEFROST DEFECTIVE TRERMDSTAT I ROOM (T2HNEDR M TOAST E_)T._ THERMOSTATIN VALVE DID NOT REVERSING SHIFT POOR f SUPERHEAT HIGH ] BROKEN FUSE LINK _ ._ ] __.____J REVERSING VALVE 4L 1 STRIP HEATERS NOT OPERATING k MOTOR CAPACITOR DEFECTIVE FAN 4°-°1 INTERNAL m_LOSS STOPPED OR CYCLING ON INDOOR FAN OVERLOAD 1 LOW SUCTION LOW HEAD I ...t 1 i PHYSICAL CONTACT WITH DEFROST TUBE PROPERLY CHARGED UNIT NOT ] -_ C_RGUtTBOARD DEFECTIVE CONNECTION ANYWHEREIN BAD ELECTRICAL DEFROST CIRCUIT l LEGEND NC ODT --- Normally Closed Outdoor Thermostat NOTE: For systems with indoor units equipped with microprocessor control, see separate controls, service, and troubleshooting manual. A07435 Fig. 10 - Troubleshooting the Cooling Cycle TROUBLESHOOTING (CONT.) INSUFFiCiENT NO COOLING OR [ ! 1 £ POWER SUPPLY COMPRESSOR OPEN LOW-VOLTAGE TRANSFORMER DEFECTIVE l COMPRESSOR RUNS BUT INSUFFICIENT COOLING COMPRESSOR RUNS BUT CYCLES ON INTERNAL OVERLOAD i I [ __{ t WILL NOT RUN COMPRESSOR I ] I ] _[ STOPPED OR CYCUNGON OUTDOOR OVERLOADFAN jL_ RESTRICTED OR RECIF_CULATING OUTDOOR AIR 1 --_ LOOSE FAN MOTOR LEAD AT I LOW PRESSURE SUCTION 1 l LOW READ HIGH PRESSURE SUCTION I RIGRSUOTiDN 1 LOW SUPERHEAT __[ NC CONTACTS =_ DEFROST OPEN RELAYS •_[ DEFECTIVE MOTOR ] _-[ DIRTY AIR FILTERS ._ __] VALVE HUNG UP OR INTERNAL REVERSING LEAK OVERCHARGED [_ "_[ _{_ OPENCIRCUIT CONTROL ] _-[ LOSS OF CHARGE ] STUCK REVERSING DAMAGED OR VALVE LOOSE COMPRESSOR LEADS AT ] _{ START (!-PH) FAULTY GEAR DISCHARGE RESTRICTEDTUBE OR GROUNDED COMPRESSOR _[ q ELECTRICAL CONNECTION LOOSE _[_ ___ OPEN, MOTOR SHORTED, WINDINGS -_ _{INOORRECT CAPACITOR OFM OR NONCONDENSABLES OVERGHARGE IN SYSTEM __{ DEFPOST THERMOSTAT DEFECTIVE ] COMPRESSOR DEFECTIVE VALVES RESTRICTED DUCT PARTLY DAMPERS CLOSED } INDOOR FROSTED COIL ] SLIGHTLY LIQUID LINE RESTRICTED 1 *-_ ==_ PRESSURE RELIEF _NTERNAL OPEN 1 UNIT ACCURATER 'NCORRECT PISTON 1 1 1 REFRIGERANT CHARGE LOW COMPRESSOR STUCK __ INTERNAL PROTECTION COMPRESSOR OPEN -_ DEFECTIVE CAPAC_OR RUN _{_ TOO HIGH OR LINE LOW VOLTAGE DEFECTIVE CAPAC_OR RUN ] t RESTRICTED ACCURATEN® BEARINGS ___ COMPRESSOR =¢ULTY ] __[ ACCURATER INCORRECT PISTON I STRAINER IN RESTRICTED DOOR COiL MOTOR DEFECTIVE OR CYCLING BLOWER ON INDOOR OVERLOAD l LEGEND NC ODT --- Normally Closed Outdoor Thermostat NOTE: For systems with indoor units equipped with microprocessor control, see separate controls, service, and troubleshooting manual. A07436 Fig. 11 - Troubleshooting Always Copyright Manufacturer 2010 Ask Carrier Corp. * reserve8 the right the Heating Cycle For 7310 to W. Morris change, St. at any * Indianapolis, time, IN specification8 46231 and Printed design8 without in U.S.A. notice Edition and without 10 obligations. Date:07/i0 Catalog No: 38QRR-6Sl Replaces: 38QRR-5SI
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