Carrier 38EYA Heat Pump User Manual
Contents
1. This will not allow contactor to be energized Disconnect power to unit and interchange 2 field wiring leads on unit contactor SEQUENCE OF OPERATION NOTE Defrost control board is equipped with a 5 minute lock out timer which may be initiated upon an interruption of power With power supplied to indoor and outdoor units transformer is energized Cooling On a call for cooling thermostat makes circuits R O R Y and R G Circuit R O energizes reversing valve switching it to cooling position On three phase models with scroll compressors the units are equipped with a phase monitor to detect if the incoming power is correctly phased for compressor operation See Fig 18 and Table 3 If the phasing is correct circuit R Y energizes contactor starting outdoor fan motor and compressor circuit R G energizes indoor unit blower relay starting indoor blower motor on high speed NOTE If the phasing is incorrect the contactor will not be energized To correct the phasing interchange any two of the three power connections on the field side When thermostat is satisfied contacts open de energizing the contactor and blower relay Compressor and motors should stop NOTE If indoor unit is equipped with a time delay relay circuit the blower runs an additional 90 sec to increase system efficiency Heating On a call for heating thermostat makes circuits R Y and R G If phasing is correct circuit R Y energize2. 15 ft 10 ft X 0 6 oz ft 6 oz of additional charge Table 4 Required Liquid Line Temperature F LIQUID PRESSURE REQUIRED me wee TEMPERATURE LIQUID PRESSURE REQUIRED ee TEMPERATURE AT SERVICE VALVE 5 10 15 30 AT SERVICE VALVE 5 10 15 50 174 56 51 46 41 398 112 107 102 97 181 58 53 48 43 405 113 108 103 98 188 61 56 51 46 412 114 109 104 99 195 63 58 53 48 419 115 110 105 100 202 65 60 55 50 426 117 112 107 102 209 67 62 57 52 433 118 113 108 103 216 69 64 59 54 440 119 114 109 104 223 71 66 61 56 447 120 115 110 105 230 73 68 63 58 454 122 117 112 107 237 75 70 65 60 461 123 118 113 108 244 77 72 67 62 468 124 119 114 109 251 79 74 69 64 475 125 120 115 110 258 81 76 71 66 482 126 121 116 111 265 82 77 72 67 489 127 122 117 112 272 84 79 74 69 496 129 124 119 114 279 86 81 76 71 503 130 125 120 115 286 88 83 78 73 510 131 126 121 116 293 89 84 79 74 517 132 127 122 117 300 91 86 81 76 524 133 128 123 118 307 93 88 83 78 531 134 129 124 119 314 94 89 84 79 538 135 130 125 120 321 96 91 86 81 545 136 131 126 121 328 97 92 87 82 552 137 132 127 122 335 99 94 89 84 559 138 133 128 123 42 100 95 90 85 566 139 134 129 124 349 102 97 92 87 573 140 135 130 125 356 103 98 93 88 580 141 136 131 126 363 105 100 95 90 587 142 137 132 127 370 106 101 96 91 594 143 138 133 128 377 107 102 97 92 601 144 139 134 129 384 1
3. HEATING amp COOLING 38EYA 12 SEER Split System Heat Pump with Puron Visit www carrier com Installation and Start Up Instructions NOTE Read the entire instruction manual before starting the installation This symbol indicates a change since the last issue SAFETY CONSIDERATIONS Improper installation 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 instructions packaged with the kits or accessories when installing Follow all safety codes Wear safety glasses protective clothing and work gloves Use quenching cloth for brazing operations Have fire extinguisher available Read these instructions thor oughly and follow all warnings or cautions included in literature and attached to the unit Consult local building codes and National Electrical Code NEC for special requirements Recognize safety information This is the safety alert symbol A When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING and CAU TION These words are used with the s
4. PRESENT 8 1 AND CONNECTIONS TO 2 STAGE FURNACES MAY NOT EXIST OR MAY ONLY BE A WIRE RATHER THAN A SCREW TERMINAL CONTACTOR 24VAC A CAUTION Do not vent refrigerant to atmosphere Recover during system repair or final unit disposal Follow these steps to properly start up the system 1 Fully back seat open liquid and vapor service valves 2 Unit is shipped with valve stem s front seated closed and caps installed replace stem caps after system is opened to refrigerant flow back seated Replace caps finger tight and tighten with wrench an additional 1 12 turn Use a backup 6 wrench on valve body flats to prevent distortion of sheet a OFF NO 24VAC ON 0K FLASH PHASE PROBLEM 12 3 HK SSACOO02 metal Close electrical disconnects to energize system 4 Set room thermostat at desired temperature Be sure set point is below indoor ambient temperature L3 Ll 5 Set room thermostat to HEAT COOL and fan control to ON A00010 or AUTO mode as desired Operate unit for 15 minutes Check system refrigerant charge Fig 18 Phase Monitor Control A CAUTION Back seating service valves are not equipped with Schrader valves Fully back seat counter clockwise valve stem before removing gage port cap 12 A CAUTION e 3 phase scroll compressors are rotation sensitive A flashing LED on phase monitor indicates reverse rotation See Fig 18 and Table 3
5. caulk See Fig 2 6 Avoid direct tubing contact with water pipes duct work floor joists wall studs floors and walls 7 Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with tubing See Fig 2 8 Ensure that tubing insulation is pliable and completely sur rounds vapor tube 9 When necessary use hanger straps which 1 in wide and conform to shape of tubing insulation See Fig 2 10 Isolate hanger straps from insulation by using metal sleeves bent to conform to shape of insulation When outdoor unit is connected to factory approved indoor unit outdoor unit contains system refrigerant charge for operation with indoor unit of same size when connected by 15 ft of field supplied or factory accessory tubing Add or subtract 0 6 oz ft of 3 8 liquid line for lengths greater or less than 15 ft For proper unit operation check refrigerant charge using charging information located on control box cover and or in the Check Charge section of this instruction IMPORTANT Maximum liquid line size is 3 8 in O D for all residential applications including long line IMPORTANT Always install the factory supplied Puron heat pump bi flow liquid line filter drier If replacing the filter drier refer to Product Data Digest for appropriate part number Obtain replacement filter driers from your distributor or branch Manufacturer reserves the right to
6. 09 104 99 94 608 145 140 135 130 391 110 105 100 95 Step 15 Final Checks CARE AND MAINTENANCE IMPORTANT Before leaving job be sure to do the following For continuing high performance and to minimize possible equip 1 Securely fasten all panels and covers ment failure periodic maintenance must be performed on this 2 Tighten service valve stem caps to 1 12 turn past finger tight equipment 3 Leave User s Manual with owner Explain system operation Frequency of maintenance may vary depending upon geographic and periodic maintenance requirements outlined in manual areas such as coastal applications 4 Fill out Dealer Installation Checklist and place in customer file 15 PURON R 410A QUICK REFERENCE GUIDE Puron refrigerant operates at 50 70 percent higher pressures than R 22 Be sure that servicing equipment and replacement components are designed to operate with Puron Puron refrigerant cylinders are rose colored Recovery cylinder service pressure rating must be 400 psig DOT 4BA400 or DOT BW400 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 at least 700 psig high side and 180 psig low side with 550 psig low side retard Use hoses with 700 psig service pressure rating Leak detectors should be designed to detect HF
7. 100 ft from unit as measured along the control voltage wires use No 16 AWG color coded wire to avoid excessive voltage drop All wiring must be NEC Class 1 and must be separated from incoming power leads Use furnace transformer fan coil transformer or accessory trans former for control power 24 v 40 va minimum NOTE Use of available 24 v accessories may exceed the mini mum 40 va power requirement Determine total transformer load ing and increase the transformer capacity or split the load with an accessory transformer as required FINAL WIRING CHECK IMPORTANT Check factory wiring and field wire connections to ensure terminations are secured properly Check wire routing to ensure wires are not in contact with tubing sheet metal etc Step 11 Compressor Crankcase Heater When equipped with a crankcase heater furnish power to heater a minimum of 24 hr before starting unit To furnish power to heater only set thermostat to OFF and close electrical disconnect to outdoor unit A crankcase heater is required in long line applications tubing greater than 50 ft or elevation greater than 20 ft between indoor and outdoor units Refer to Application Guideline and Service Manual for Residential Split System Air Conditioners and Heat Pumps Using Puron Refrigerant Step 12 Install Electrical Accessories Refer to the individual instructions packaged with kits or acces sories when installing Step 13 Start Up A CA
8. AMETERS SIZE NOT PERMITTED Liquid Vapor Liquid Vapor Vapor Vapor 018 024 3 8 5 8 3 8 5 8 3 4 ACR 3 4 030 3 8 3 4 3 8 3 4 7 8 1 18 036 3 8 3 4 3 8 3 4 7 8 1 18 042 048 3 8 7 8 3 8 7 8 7 8 3 4 and 1 1 8 060 3 8 1 1 8 3 8 1 1 8 7 8 3 4 NOTES 1 Tube diameters are for lengths up to 50 ft For tubing lengths greater than 50 ft consult the Application Guideline and Service Manual Residential Split System Air Conditioners and Heat Pumps Using Puron Refrigerant 2 Refrigerant tubes and indoor coils must be evacuated to 500 microns to minimize contamination and moisture in the system A CAUTION Do not leave system open to atmosphere any longer than minimum required for installation POE oil in compressor is extremely susceptible to moisture absorption Always keep ends of tubing sealed during installation A CAUTION If ANY refrigerant tubing is buried provide a 6 in vertical rise at service valve Refrigerant tubing lengths up to 36 in may be buried CAUTION To prevent damage to unit or service valves observe the following Use a brazing shield Wrap service valves with wet cloth or use a heat sink material Outdoor units may be connected to indoor section using accessory tubing package or field supplied refrigerant grade tubing of correct size and condition For tubing requirements beyond 50 ft substan tial capacity and performance losses can occur Following the recommendations in the Application Gu
9. ATIONS APPLICATIONS BELOW 55 F OVER 50 FT Crankcase Heater Yes Yes Evaporator Freeze Thermostat Yes No Compressor Start Assist Capacitor and Relay Yes Yes Puron Low Ambient Pressure Switch Yes No Wind Baffle See Low Ambient Instructions No Support Feet Recommended No Hard Shutoff TXV Yest Yest Liquid Line Solenoid Valve for Heating No Gee Line Application Guideline For tubing line sets between 50 and 175 ft or when vertical difference is greater than 20 ft refer to Application Guideline and Service Manual Residential Split System Air Conditioners and Heat Pumps Using Puron t Required for all applications wrench an additional 1 12 turn 15 ft lb DO NOT OVER TIGHTEN REFRIGERANT TUBING AND FILTER DRIER CAUTION Installation of filter drier in liquid line is required Connect vapor tubing to fittings on outdoor unit vapor service valves Connect liquid tube to filter drier See Table 1 and Fig 8 Use refrigerant grade tubing Connect other end of filter drier to adapter tube on liquid service valve SWEAT CONNECTION A CAUTION To avoid valve damage while brazing service valves must be wrapped in a heat sink material such as a wet cloth Wrap service valves and filter drier with a wet cloth or heat sinking material Braze connections using either silver bearing or non silver bearing brazing material Do not use soft solder materials which melt below 800 F Consult local co
10. C refrigerant Puron as with other HFCs is only compatible with POE oils Vacuum pumps will not remove moisture from oil Do not leave Puron suction line filter driers in line longer than 72 hrs Do not use liquid line filter driers with rated working pressures less than 600 psig e Do not install a suction line filter drier in liquid line e POE oils absorb moisture rapidly Do not expose oil to atmosphere Poe oils may cause damage to certain plastics and roofing materials Wrap all filter driers and service valves with wet cloth when brazing A factory approved liquid line filter drier is required on every unit Do not use an R 22 If indoor unit is equipped with an R 22 TXV it must be changed to an TXV All Puron Heat Pumps must have indoor Puron Never open system to atmosphere while it is under a vacuum When system must be opened for service recover refrigerant break vacuum with dry nitrogen prior to opening to atmosphere Evacuate to 500 microns prior to recharging Always replace filter drier after opening system for service Do not vent Puron into the atmosphere Do not use capillary tube coils Observe all warnings cautions and bold text Copyright 2001 CARRIER Corp 7310 W Morris St Indianapolis IN 46231 38eya3si Manufacturer reserves the right to discontinue or change at any time specifications or
11. HEAT PUMP 24 VAC HOT 24 VAC HOT 24 VAC COM 24 VAC COM COOL HEAT COOL HEAT STAGE 1 Y STAGE 1 HEAT STAGE 2 97582 A97581 FA FB FX OTHER BRAND FAN COIL WITH HP THERMOSTAT SMART HEAT 24 VAC HOT 24 VAC COM COOL HEAT STAGE 1 INDOOR FAN Rvs EMERGENCY HEAT HEAT STAGE 2 A97583 Fig 17 Typical 24 v Circuit Connections using Other HP Thermostats with Smart Heat and No Outdoor Thermostat 1 Outdoor Thermosiat or Supplemental Heat Relay 11 LEGEND 24V FACTORY WIRING 24 V FIELD WIRING FIELD SPLICE CONNECTION OUTDOOR THERMOSTAT EMERGENCY HEAT RELAY SUPPLEMENTAL HEAT RELAY A97413 WIRING DIAGRAM NOTES 1 CARRIER THERMOSTAT WIRING DIAGRAMS ARE ONLY ACCURATE FOR MODEL NUMBERS _______ 2 WIRING MUST CONFORM TO NEC LOCAL CODES 3 ALL UNITS ARE EQUIPPED WITH PRESSURE SWITCHES TEMPERATURE SWITCH AND 5 MINUTE COMPRESSOR CYCLE PROTECTION CONNECT 24 V FIELD WIRING TO FACTORY PROVIDED STRIPPED LEADS 4 THERMOSTATS ARE FACTORY CONFIGURED WITH 5 MINUTE COMPRESSOR CYCLE PROTECTION AND 4 CYCLES PER HR LIMIT SEE THERMOSTAT INSTALLATION INSTRUCTIONS 5 TO STAGE ELECTRIC RESISTANCE HEAT CONSULT OUTDOOR THERMOSTAT INSTALLATION INSTRUCTIONS 6 UNDERLINED LETTER ON DUAL TERMINAL INDICATES USAGE FOR EXAMPLE O W2 MEANS O W2 MEANS W2 7 OUTDOOR TEMPERATURE SENSOR MUST BE ATTACHED IN ALL DUAL FUEL INSTALLATIONS JUMPER WIRE BETWEEN O W2 AND L THERMOSTAT TERMINALS MUST BE
12. ONNECT PER N E C AND OR LOCAL CODES CONTACTOR O T FIELD POWER 8 BLUE FIELD GROUND WIRING GROUND LUG A94025 Fig 11 Line Power Connections 1 Pump system down to 28 in of mercury and allow pump to continue operating for an additional 15 minutes 2 Close service valves and shut off vacuum pump 3 Connect a nitrogen cylinder and regulator to system and open until system pressure is 2 psig 4 Close service valve and allow system to stand for 1 hr During this time dry nitrogen will be able to diffuse throughout the system absorbing moisture 5 Repeat this procedure as indicated in Fig 10 System will then be free of any contaminants and water vapor FINAL TUBING CHECK IMPORTANT Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment Ensure tubes are not rubbing against each other or any sheet metal Pay close attention to feeder tubes making sure wire ties on feeder tubes are secure and tight Step 10 Make Electrical Connections A WARNING To avoid personal injury or death do not supply power to unit with compressor terminal box cover removed Be sure field wiring complies with local and national fire safety and electrical codes and voltage to system is within limits shown on unit rating plate Contact local power company to correct improper voltage See unit rating plat
13. UTION To prevent compressor damage or personal injury observe the following Do not overcharge system with refrigerant Do not operate unit in a vacuum or at negative pressure Do not disable low pressure switch In scroll compressor applications Dome temperatures may be hot A CAUTION To prevent personal injury wear safety glasses protective clothing and gloves when handling refrigerant CARRIER PROGRAMMABLE THERMOSTAT FA FB FX MODEL HP FAN COIL 24 VAC HOT INDOOR FAN HEAT STAGE 2 COOL HEAT STAGE 1 RVS COOLING NOT USED 24 VAC COM NOT USED TROUBLE OPTIONAL OUTDOOR SENSOR CONNECTION A97561 CARRIER PROGRAMMABLE THERMOSTAT MODEL HP TWO HEAT OUTDOOR PUMP THERMOSTATS FA FB FX FAN COIL 24 VAC HOT INDOOR FAN HEAT STAGE 2 COOL HEAT STAGE 1 RVS COOLING NOT USED 24 VAC COM NOT USED TROUBLE OPTIONAL OUTDOOR SENSOR CONNECTION NOTE Remove wires from crimp nut in indoor fan coil when installing outdoor thermostats IMPORTANT When using outdoor thermostats Wo must be energized when requesting supplemental heat A97563 CARRIER PROGRAMMABLE ONE THERMOSTAT FA FB FX HEAT OUTDOOR MODEL HP FAN COIL PUMP THERMOSTAT 24 VAC HOT INDOOR FAN HEAT STAGE 2 COOL HEAT STAGE 1 RVS COOLING NOT USED 24 VAC COM NOT USED TROUBLE OPTIONAL OUTDOOR SENSOR CONNECTION NOTE Remove wires from crimp nut in indoor f
14. afety alert symbol DAN GER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage A WARNING Before installing modifying or servicing system main elec trical 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 Electrical shock can cause personal injury or death A CAUTION Puron R 410A systems operate at higher pressures than standard R 22 systems Be certain that service equipment is rated for Puron Some R 22 service equipment may not be acceptable Check with your distributor INSTALLATION RECOMMENDATIONS NOTE In some cases noise in the living area has been traced to gas pulsations from improper installation of equipment 1 Locate unit away from windows patios decks etc where unit operation sound may disturb customer 2 Ensure that vapor and liquid tube diameters are appropriate to capacity of unit 3 Run refrigerant tubes as directly as possible by avoiding unnecessary turns and bends A99327 Fig 1 Model 38EYA 4 Leave some slack between structure and unit to absorb vibration 5 When passing refrigerant tubes through the wall seal opening with RTV or other pliable silicon based
15. an coil when installing outdoor thermostat IMPORTANT When using outdoor thermostat Wo must be energized when requesting supplemental heat A97562 CARRIER PROGRAMMABLE THERMOSTAT FV4A HEAT MODEL HP FAN COIL PUMP 24 VAC HOT INDOOR FAN HEAT STAGE 2 COOL HEAT STAGE 1 RVS COOLING NOT USED 24 VAC COM NOT USED TROUBLE OPTIONAL OUTDOOR SENSOR CONNECTION 97564 Fig 12 Typical 24 v Circuit Connections using Carrier Model Thermostat with Fan Coils No Outdoor Thermostat 1 Outdoor Thermostat or 2 Outdoor Thermostats 7 OTHER BRAND HP THERMOSTAT FA FB FX FAN COIL 24 VAC HOT 24 VAC COM HEAT STAGE 2 COOL HEAT STAGE 1 FMERGENGY IF AVAILABLE A97577 TWO OTHER BRAND FA FB FX HEAT OUTDOOR HP THERMOSTAT FAN COIL PUMP THERMOSTATS 24 VAC HOT 24 VAC COM HEAT STAGE 2 COOL HEAT STAGE 1 EMERGENCY HEAT IF AVAILABLE NOTE Remove wires from crimp nut in indoor fan coil when installing outdoor thermostats IMPORTANT When using outdoor thermostats Wp must be energized when requesting supplemental heat A97579 ONE OTHER BRAND FA FB FX HEAT OUTDOOR HP THERMOSTAT FAN COIL PUMP THERMOSTAT 24 VAC HOT 24 VAC COM HEAT STAGE 2 COOL HEAT STAGE 1 EMERGENCY HEAT NOTE Remove wires from crimp nut in indoor fan coil when installing outdoor thermostat IMPORTANT When using outdoor thermostat Wo must be energized when requesting supple
16. d Y1 W2 Refer to 4 Installation Instructions Fig 15 Typical 24 v Circuit Connections using Carrier Model 2S Thermostat with FV4A Fan Coil and Smart Staging CARRIER CARRIER PROGRAMMABLE FA FB FX PROGRAMMABLE FA FB FX ONE THERMOSTAT FAN COIL WITH HEAT THERMOSTAT FAN COIL WITH OUTDOOR HEAT MODEL HP SMART HEAT PUMP MODEL HP SMART HEAT THERMOSTAT PUMP 24 VAC HOT F 24 VAC HOT 4 rR INDOOR FAN INDOOR FAN gt HEAT STAGE 2 HEAT STAGE 2 L COOL HEAT COOL HEAT STAGE 1 rt STAGE 1 rt I RVS COOLING FA RVS COOLING tt D l NOT USED NOT USED l l E 24 Saat 24 VAC COM NOT USED NOT USED TROUBLE TROUBLE OPTIONAL OPTIONAL OUTDOOR SENSOR SENSOR CONNECTION CONNECTION 97566 97567 CARRIER FA FB FX PROGRAMMABLE FAN COIL WITH HEAT THERMOSTAT SMART HEAT PUMP MODEL HP SUPPLEMENTAL HEATING RELAY 24 VAC HOT eee ava ep INDOOR FAN HEAT STAGE 2 i COOL HEAT ILH STAGE 1 rt RVS COOLING KE AEX li NOT USED CUT i JW1 24 VAC COM DES 52 97568 Fig 16 Typical 24 v Circuit Connections using Carrier Model HP Thermostat with Smart Heat No Outdoor Thermostat 1 Outdoor Thermostat or Supplemental Heat Relay 10 FA FB FX FA FB FX OTHER BRAND FAN COIL WITH HEAT OTHER BRAND FAN COIL WITH HEAT HP THERMOSTAT SMART HEAT PUMP HP THERMOSTAT SMART
17. de require ments LEAK CHECKING Leak test all joints in indoor outdoor and refrigerant tubing EVACUATE REFRIGERANT TUBING AND INDOOR COIL A CAUTION Never use the system compressor as a vacuum pump Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns The alternate triple evacuation method may be used if the procedure outlined below is followed IMPORTANT Never open system under vacuum to atmosphere without first breaking it open with nitrogen Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring this vacuum depth The deep vacuum method is the most positive way of assuring a system is free of air and liquid water See Fig 9 Triple Evacuation Method The triple evacuation method should only be used when vacuum pump is only capable of pumping down to 28 in of mercury vacuum and system does not contain any liquid water Refer to Fig 10 and proceed as follows 5000 4500 4000 5200 2 2500 2000 1500 1000 500 LEAK IN SYSTEM VACUUM TIGHT TOO WET TIGHT DRY SYSTEM MINUTES A95424 Fig 9 Deep Vacuum Graph v BREAK VACUUM WITH DRY NITROGEN y y y v v EVACUATE MA CHECK FOR TIGHT DRY SYSTEM IF IT HOLDS DEEP VACUUM v CHARGE SYSTEM A95425 Fig 10 Triple Evacuation Method DISC
18. designs without notice and without incurring obligations Book 114 101 Catalog No 533 80006 Printed in U S A Form 38EYA 3SI Pg 16 Tab 5a 5a 4 01 Replaces 38EYA 2SI
19. discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 101 Catalog No 533 80006 Tab 5 5 Printed in U S A Form 38EYA 3SI Pg 1 4 01 Replaces 38EYA 2SI NOTE Avoid contact between tubing and structure OUTDOOR WALL INDOOR WALL CAULK F LIQUID TUBE WA id VAPOR TUBE INSULATION THROUGH THE WALL HOIST INSULATION VAPOR TUBE HANGER STRAP AROUND VAPOR TUBE ONLY 0 3 1 MIN gt a LIQUID TUBE SUSPENSION A94028 Fig 2 Connecting Tubing Installation INSTALLATION IMPORTANT Specifications for this unit in residential new construction market require using the outdoor unit indoor unit refrigerant tubing sets metering device and filter drier listed in presale literature There can be no deviation Consult the Appli cation Guideline and Service Manual for Residential Split System Air Conditioners and Heat Pumps using Puron Refrigerant to obtain required unit changes for specific applications and for R 22 retrofit Step 1 Check Equipment and Job Site UNPACK UNIT Move to final location Remove carton taking care not to damage unit INSPECT EQUIPMENT File claim with shipping company prior to installation if shipment is damaged or incomplete Locate unit rating plate on unit corner panel It contains information needed to properly install unit C
20. e for recommended circuit protection device NOTE Operation of unit on improper line voltage constitutes abuse and could affect unit reliability See unit rating plate Do not install unit in system where voltage or phase imbalance 3 phase may fluctuate above or below permissible limits NOTE Use copper wire only between disconnect switch and unit NOTE Install branch circuit disconnect of adequate size per NEC to handle unit starting current Locate disconnect within sight from and readily accessible from unit per Section 440 14 of NEC ROUTE GROUND AND POWER WIRES Remove access panel to gain access to unit wiring Extend wires from disconnect through power wiring hole provided and into unit control box A WARNING The unit cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes Failure to follow this warning can result in an electric shock fire or death CONNECT GROUND AND POWER WIRES Connect ground wire to ground connection in control box for safety Connect power wiring to contactor as shown in Fig 11 CONNECT CONTROL WIRING Route 24 v control wires through control wiring grommet and connect leads to control wiring See Fig 12 17 Use No 18 AWG color coded insulated 35 C minimum wire If thermostat is located more than
21. ed If it is desirable to observe a complete defrost in warmer weather the thermostat must be closed as follows 1 Turn off power to outdoor unit 2 Disconnect outdoor fan motor lead from OF2 on control board See Fig 19 Tape to prevent grounding 3 Restart unit in heating mode allowing frost to accumulate on outdoor coil 4 After a few minutes in heating mode liquid line temperature should drop below closing point of defrost thermostat ap proximately 30 F NOTE Unit will remain in defrost until defrost thermostat reopens at approximately 80 F coil temperature at liquid line or remainder of defrost cycle time 5 Turn off power to outdoor and reconnect fan motor lead to OF2 on control board after above forced defrost cycle PressureGuard Switch This outdoor unit is equipped with a heating vapor pressure limiting device PressureGuard which cycles the outdoor fan at high ambient heating conditions The exact ambient at which outdoor fan cycles depends on indoor and outdoor unit sizing The effect of outdoor fan cycling on HSPF Heating Seasonal Perfor mance Factor is insignificant due to its occurrence at outdoor ambients where building load is very low Puron is a high pressure refrigerant The purpose of this switch is to provide maximum flexibility and minimum cost for the installer owner by not requiring special thicker wall vapor tubing and indoor coils thus allowing limited retrofit The use of t
22. for another 30 sec and the fan will turn off for 40 sec before starting in the heating mode Defrost The defrost control is a time temperature control which includes a field selectable time period DIP switch 1 and 2 on the board between defrost cycles of 30 60 90 or 120 minutes factory set at 90 minutes To initiate a forced defrost two options are available depending on the status of the defrost thermostat If defrost thermostat is closed speedup pins J1 must be shorted by placing a flat head screwdriver in between for 5 sec and releasing to observe a complete defrost cycle When the Quiet Shift switch is selected compressor will be turned off for two 30 sec intervals during this complete defrost cycle as explained previously When Quiet Shift switch is in factory default OFF position a normal and complete defrost cycle will be observed If defrost thermostat is in open position and speedup pins are shorted with a flat head screwdriver for 5 sec and released a short defrost cycle will be observed actual length is dependent upon the selected Quiet Shift position When Quiet Shift switch is in ON position the length of defrost is 1 minute 30 sec compressor off period followed by 30 sec of defrost with com pressor operation On return to heating operation compressor will again turn off for an additional 30 sec and the fan for 40 sec When the Quiet Shift is in OFF position only a brief 30 sec cycle will be observ
23. heck rating plate to be sure unit matches job specifications Step 2 Install On a Solid Level Mounting Pad If conditions or local codes require the unit be attached to pad tie down bolts should be used and fastened through knockouts provided in unit base pan Refer to unit mounting pattern in Fig 3 to determine base pan size and knockout hole location On rooftop applications mount on level platform or frame Place unit above a load bearing wall and isolate unit and tubing set from structure Arrange supporting members to adequately support unit and minimize transmission of vibration to building Consult local codes governing rooftop applications 9 53 TIEDOWN KNOCKOUTS 2 PLACES A94199 DIMENSIONS IN UNIT MINIMUM TIEDOWN KNOCKOUT SIZE MOUNTING PAD LOCATIONS DIMENSIONS A B 018 024 030 22 1 2 X 22 1 2 3 11 16 18 1 8 14 3 8 036 060 30 X 30 6 1 2 23 1 2 20 Fig 3 Mounting Unit to Pad A CAUTION Do not allow POE lubricant to come into contact with roofing material POE may determine certain types of synthetic roofing Roof mounted units exposed to winds above 5 mph may require wind baffles Consult the Application Guideline and Service Manual for Residential Split System Air Conditioners and Heat Pumps using Puron Refrigerant for wind baffle construction NOTE Unit must be level to within 2 3 8 in ft per compressor manufacture
24. his switch also allows the maximum number of indoor coil choices at minimum cost for the installer owner since it can use standard refrigeration tubing NOTE Due to presence of a PressureGuard switch in outdoor unit fan circuit and the possibility of fan cycling this unit may go into brief defrost at high ambient heating conditions Pol fered n z a u 1 Q 3 Speedup Pins EN C CESO130076 00 Defrost interval DIP switches A99442 Fig 19 Defrost Control Step 14 Check Charge UNIT CHARGE Factory charge is shown on unit rating plate To check charge in cooling mode refer to Cooling Only Procedure To check charge in heating mode refer to Heating Check Chart Procedure COOLING ONLY PROCEDURE NOTE If superheat or subcooling charging conditions are not favorable charge must be weighed in accordance with unit rating plate 0 6 oz ft of 3 8 in liquid line above or below 15 ft respectively EXAMPLE To calculate additional charge required for a 25 ft line set 25 ft 15 ft 10 ft X 0 6 oz ft 6 oz of additional charge Units installed with cooling mode TXV require charging with the subcooling method 1 Operate unit a minimum of 10 minutes before checking charge 2 Measure liquid service valve pressure by attaching an accurate gage to service port 3 Measure liquid line temperature by attaching an accurate thermistor type or electronic thermometer to
25. ices or pistons For TXV kit part number and charging instructions refer to TXV label in outdoor unit FURNACE COILS If TXV installation is required remove existing AccuRater from indoor coil Refer to Fig 4 and 5 and install TXV kit specifically designed for Puron as follows 1 Install suction tube adapter 2 Install liquid flare to sweat adapter 3 Connect external equalizer tube to fitting on suction tube adapter 4 Position sensing bulb on horizontal portion of suction tube adapter Secure using supplied hardware 5 Insulate bulb after installation See Fig 5 6 Leak check all connections FAN COILS If indoor unit fan coil comes factory equipped with a bi flow hard shutoff TXV specifically designed for Puron no TXV change is required If fan coil is not designed for Puron a Puron installation is required Refer to TXV kit Installation Instructions for details on installation Step 7 Check Defrost Thermostat Check defrost thermostat to ensure it is properly located and securely attached There is a liquid header with a brass distributor and feeder tube going into outdoor coil At the end of 1 of the feeder tubes there is a 3 8 in OD stub tube approximately 3 in long See Fig 6 The defrost thermostat should be located on stub tube Note that there is only 1 stub tube used with liquid header and on most units it is the bottom circuit Step 8 In Long Line Applica
26. ideline and Service Manual for Residential Split System Air Conditioners and Heat Pumps using Puron Refrigerant to minimize losses Refer to Table 1 for field tubing diameters Refer to Table 2 for accessory requirements Refrigerant tubes and indoor coil must be evacuated to 500 microns to minimize contamination and moisture in the system OUTDOOR UNIT CONNECTED TO FACTORY APPROVED INDOOR UNIT These outdoor units are carefully evaluated and listed with specific indoor coils for proper system performance IMPORTANT Do not apply indoor coils which are not factory approved to these units INSTALL ADAPTER TUBE 1 Remove plastic retainer holding outdoor piston in liquid service valve 2 Check outdoor piston size with matching number listed on unit rating plate 3 Locate plastic bag taped to unit containing adapter tube 4 Remove teflon washer from bag and install on open end of liquid service valve See Fig 7 5 Remove adapter tube from bag and connect threaded nut to liquid service valve Tighten nut finger tight and then with SWEAT FLARE a ADAPTER TEFLON ye SEAL PISTON os PISTON a LIQUID SERVICE VALVE A99441 Fig 7 Liquid Service Valve with Sweat Adapter Tube LIQUID LINE FILTER DRIER LIQUID A00431 Fig 8 Filter Drier with Sweat Adapter Tube and Liquid Tube Table 2 Accessory Usage REQUIRED FOR LOW AMBIENT REQUIRED FOR LONG LINE ACCESSORY APPLIC
27. liquid near outdoor coil 4 Refer to Heat Pump Charging Instructions label on outdoor unit 14 5 Refer to Table 4 Find the point where required subcooling temperature intersects measured liquid service valve pressure 6 To obtain required subcooling temperature at a specific liquid line pressure add refrigerant if liquid line temperature is higher than indicated or reclaim refrigerant if temperature is lower Allow a tolerance of 3 F HEATING CHECK CHART PROCEDURE To check system operation during heating cycle refer to the HEAT Pump Charging Instructions label on outdoor unit This chart indicates whether a correct relationship exists between system operating pressure and air temperature entering indoor and outdoor units If pressure and temperature do not match on chart system refrigerant charge my not be correct Do not use chart to adjust refrigerant charge NOTE In heating mode check refrigerant charge only when pressures are stable If operating conditions cause PressureGuard switch to open and outdoor fan to cycle check refrigerant charge in cooling or lower indoor dry bulb temperature If in doubt remove charge and weigh in correct refrigerant charge NOTE When charging is necessary during heating season charge must be weighed in accordance with unit rating plate 0 6 oz ft of 3 8 in liquid line above or below 15 ft respectively EXAMPLE To calculate additional charge required for a 25 ft line set 25 ft
28. mental heat A97578 OTHER BRAND FV4A HEAT HP THERMOSTAT FAN COIL PUMP J1 JUMPER HEAT STAGE 2 w2 k 24 VAC HOT 24 VAC COM COOL HEAT STAGE 1 INDOOR FAN 5 cooLinG A97580 Fig 13 Typical 24 v Circuit Connections using Other HP Thermostats with Fan Coils and No Outdoor Thermostat or 2 Outdoor Thermostats CARRIER CARRIER DUAL FUEL DUAL FUEL TWO STAGE OR THERMOSTAT SINGLE STAGE THERMOSTAT VARIABLE SPEED MODEL DF FURNACE HEAT PUMP MODEL DF FURNACE HEAT PUMP 24 VAC HOT 24 VAC HOT FAN FURNACE COMPRESSOR RVS COOLING N A FURNACE HI 24 VAC COM RVS HEATING 24 VAC COM RVS HEATING See note 7 See notes 7 and 8 OUTDOOR 51 4 OUTDOOR OUTDOOR 51 F4 OUTDOOR SENSOR TEMPERATURE SENSOR TEMPERATURE CONNECTION s2 4 SENSOR CONNECTION s2 SENSOR A97538 A97539 Fig 14 Typical 24 v Circuit Connection using Carrier Model DF Thermostat with Single or 2 Stage Furnace CARRIER PROGRAMMABLE FV4A HEAT THERMOSTAT FAN COIL PUMP MODEL 2S 24 VAC HOT FAN COOL HEAT STAGE 1 HEAT STAGE 2 HEAT STAGE 3 RVS COOLING 24 VAC COMM RVS HEATING TROUBLE OUTDOOR SENSOR CONNECTION Smart Sequencing Application Model 2S thermostat with switch C OFF and switch D ON uses single speed heat pump 4 fan coil with selected 2 1 size ratio heaters Provides stages of auxiliary heat for even heating comfort via W W1 an
29. r specifications Step 3 Clearance Requirements When installing allow sufficient space for airflow clearance wiring refrigerant piping and service Allow 30 in clearance to service end of unit and 48 in above unit For proper airflow 6 in clearance on side of unit and 12 in on all remaining sides must be maintained Maintain a distance of 24 in between units Position so water snow or ice from roof or eaves cannot fall directly on unit On rooftop applications locate unit at least 6 in above roof surface Step 4 Operating Ambients The minimum outdoor operating ambient in cooling mode without additional accessories is 55 F and the maximum outdoor operat ing ambient in cooling mode is 125 F The maximum outdoor operating ambient in heating mode is 66 F Step 5 Elevate Unit A CAUTION Accumulation of water and ice in base pan may cause equipment damage Elevate unit per local climate and code requirements to provide clearance above estimated snowfall level and ensure adequate drainage of unit SENSING BULB EQUALIZER TUBE THERMOSTATIC EXPANSION VALVE A88382 Fig 4 Typical Installation Step 6 Check Indoor Expansion Device A CAUTION For proper unit operation and reliability units must be installed with hard shutoff TXV specifically designed to operate with Puron Do not use R 22 TXV Do not install with evaporator coils having capillary tube metering dev
30. s contactor starting out door fan motor and compressor Circuit R G energizes indoor blower relay starting blower motor on high speed Should temperature continue to fall R W2 is made through sec stage room thermostat bulb Circuit R W2 energizes a se quencer bringing on first bank of supplemental electric heat and providing electrical potential to sec heater sequencer if used If outdoor temperature falls below setting of outdoor thermostat field installed option contacts close to complete circuit and bring on sec bank of supplemental electric heat When thermostat is satisfied its contactors open de energizing contactor and sequencer All heaters and motors should stop TABLE 3 PHASE MONITOR LED INDICATORS LED STATUS OFF No call for compressor operation FLASHING Reversed phase ON Normal Quiet Shift Quiet Shift is a field selectable defrost mode which will eliminate occasional noise that could be heard at the start of the defrost cycle and restarting of heating cycle It is selected by placing DIP switch 3 on defrost board in ON position When Quiet Shift switch is placed in ON position and a defrost is initiated the following sequence of operation will occur Revers ing valve will energize compressor will turn off for 30 sec then turn back on to complete defrost At the start of heating cycle after 13 conclusion of defrost mode reversing valve will de energize the compressor will turn off
31. tions Install Liquid Line Solenoid Valve LSV For refrigerant piping arrangements with equivalent lengths greater than 50 ft or when elevation difference between indoor and outdoor unit is greater than 20 ft follow all requirements of the Long Line Guideline section in the Application Guideline and SENSING BULB STRAP a 4 8 O CLOCK x 4 O CLOCK A00399 Fig 5 Positioning of Sensing Bulb FEEDER TUBE STUB TUBE DEFROST THERMOSTAT A97517 Fig 6 Defrost Thermostat Location Service Manual for Residential Split System Air Conditioners and Heat Pumps Using Puron Refrigerant If required by Long Line Application Guideline install LSV kit part No KHALSO401LLS specifically designed for Puron Heat Pump LSV should be installed between filter drier and indoor coil as close as possible to filter drier Follow the Installation Instruc tions included with accessory kit IMPORTANT Flow arrow must point toward outdoor unit Step 9 Making Piping Connections A WARNING Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid personal injury or death Use all service ports and open all flow control devices including solenoid valves Table 1 Refrigerant Connections and Recommended Liquid Line and Vapor Tube Diameters In RST TUBE UNIT CONNECTION DIAMETER TUBE DIAMETER ALTERNATE lt DI
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