Carrier 38ETG Instruction manual
Contents
1. pra EVAPORATOR ENTERING AIR TEMPERATURE F WB F 50 52 54 56 58 60 62 64 66 68 70 72 74 76 55 9 12 14 17 20 23 26 29 32 35 37 40 42 45 60 7 10 12 15 18 21 24 27 30 33 35 38 40 43 65 6 10 13 16 19 21 24 27 30 33 36 38 41 70 7 10 13 16 19 21 24 27 f 30 33 36 39 75 6 9 12 15 18 21 24 28 31 34 37 80 5 8 12 15 18 21 25 28 31 35 85 8 11 15 19 22 26 30 33 90 5 9 13 16 20 24 27 31 95 6 10 14 18 22 25 29 100 8 12 15 20 23 27 105 5 9 13 17 22 26 110 6 11 15 20 25 115 8 14 18 23 Table 6 Reguired Suction Line Temperature F WB SUPERHEAT SUCTION PRESSURE AT SERVICE PORT PSIG pei 107 8 112 2 116 8 121 2 126 0 130 8 138 8 140 8 145 8 0 35 37 39 41 43 45 47 49 51 2 37 39 41 43 45 47 49 51 53 4 39 41 43 45 47 49 51 53 55 6 41 43 45 47 49 51 53 55 57 8 43 45 47 49 51 53 55 57 59 10 45 47 49 51 53 55 57 59 61 12 47 49 51 B 465 57 59 61 63 14 4 5 53 5 57 59 61 63 65 16 51 53 55 57 59 61 63 65 67 18 53 55 57 59 61 63 65 67 69 20 55 57 59 61 63 65 67 69 71 22 5 59 61 63 65 67 69 71 73 24 59 61 63 65 67 69 71 73 75 26 61 63 65 67 69 71 73 75 77 28 63 65 67 69 71 73 75 77 79 30 65 67 69 71 73 75 77 79 81 32 67 69 71 73 75 77 79 81 83 34 69 71 73 75 77 79 81 83 85 36 71 73 75 77 79 81 83 85 87 38 73 75 77 79 81 83 85 87 89 40 75 77 79 81 83 85 87 89 91 AIC Typical AIR AIC Typical AIR THERMOSTAT FAN COIL CONDITIONER THERMOSTAT FURNACE CONDITIONE2. A CAUTION 3 phase scroll compressors are rotation sensitive A flashing LED on phase monitor indicates reverse rotation See Fig 10 and Table 3 This will not allow contactor to be energized e Disconnect power to unit and interchange 2 field wiring leads on unit contactor Follow these steps to properly start up the system 1 After system is evacuated fully back seat open liquid and vapor service valves M Unit is shipped with valve stem s front seated closed and caps installed replace stem caps after system is opened to refrigerant flow Replace caps finger tight and tighten with wrench an additional 1 12 turn 3 Close electrical disconnects to energize system 4 Set room thermostat at desired temperature Be sure set point is below indoor ambient temperature 5 Set room thermostat to COOL and fan control to ON or AUTO mode as desired Operate unit for 15 minutes Check system refrigerant charge SEQUENCE OF OPERATION Turn on power to indoor and outdoor units Transformer is energized On a call for cooling thermostat makes circuits R Y and R G On three phase models with scroll compressors the units are equipped with a phase monitor to detect in the incoming power is correctly phased for compressor operation If the phasing is correct circuit R Y energizes contactor starting outdoor fan motor and compres sor circuit R G energizes indoor unit blower relay starting indoor
3. i AB i H i it H ll ah I nl A98525 Fig 1 Models 38EZG 38ETG 38ESG 3 Run refrigerant tubes as directly as possible by avoiding unnecessary turns and bends 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 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 are 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 the same size when connected by 15 ft of field supplied or factory accessory tubing For proper unit opera tion 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
4. HEATING amp COOLING 38EZG 38ETG 38ESG 12 13 14 SEER Split System Air Conditioner with Puron Visit WWW carfier com Installation and Start Up Instructions NOTE Read the entire instruction manual before starting the installation This symbol gt 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 these signal words DANGER WARNING and CAUT
5. Units with Cooling Mode Puror 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 liquid near outdoor coil 4 Refer to unit rating plate for required subcooling temperature 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 Units with Indoor Pistons Units installed with mdoor pistons require charging by the super heat method The following procedure is valid when indoor airflow is within 21 percent of its rated CFM 1 Operate unit a minimum of 10 minutes before checking charge 2 Measure suction pressure by attaching an accurate gage to suction valve service port 3 Measure suction temperature by attaching an accurate ther mistor type or electronic thermometer to suction line at service valve 4 Measure outdoor air dry bulb temperature with thermometer 5 Measure indoor air entering indoor coil wet bulb tempera ture with a sling psychrometer 6 Refer to Table 5 Find outdoor temperature and evaporator entering ai
6. 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 its contacts open de energizing contacter and blower relay Compressor and motors stop If indoor unit is equipped with a time delay relay circuit the indoor blower runs an additional 90 sec to increase system efficiency CONTACTOR 24VAC COM yoo N O O O C5 T O D vw ale GFFeNO 24VAC GN DK FLASH PHASE PROBLEM c o UU A00010 Fig 10 Phase Monitor Control Table 3 Phase Monitor Led Indicators LED STATUS OFF No call for compressor operation FLASHING Reversed phase ON Normal Step 12 Check Charge UNIT CHARGE Factory charge and charging method are shown on unit informa tion plate Charge Puron units using a commercial type metering device in manifold hose Charge refrigerant into suction line 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 m liquid line above or below 15 ft respectively EXAMPLE To calculate additional charge required for a 25 ft line set 25 ft 15 f 10 ft X 0 6 oz ft 6 oz of additional charge COOLING ONLY PROCEDURE TXV Units installed with cooling mode TXV require charging by the subcooling method
7. mation 299 88 86 84 82 80 78 308 90 88 86 84 82 80 317 92 90 88 86 84 82 326 94 92 90 88 86 84 335 96 94 92 90 88 86 345 98 96 94 92 90 88 354 100 98 96 94 92 90 364 102 100 98 96 94 92 374 104 102 100 98 96 94 384 06 104 102 100 98 96 395 108 106 104 102 100 98 406 10 108 106 104 102 106 416 112 110 108 106 104 102 427 114 112 110 108 106 104 439 16 114 112 110 108 106 450 118 116 114 112 110 108 462 20 118 116 114 112 110 474 486 499 122 120 118 116 114 112 124 122 120 118 116 114 126 124 122 120 118 116 sE EE 7 DESE MERE E Hate EE 511 128 126 124 122 120 118 8 If a unit has a higher suction line temperature than charted temperature add refrigerant until charted temperature is reached 9 If unit has a lower suction line temperature than charted temperature reclaim refrigerant until charted temperature is reached 10 When adding refrigerant charge in liquid form imto 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 Step 13 Final Checks IMPORTANT Before leaving job be sure to do the following Table 5 Superheat Charging
8. modulation feature and MotorMaster Control only on unit rating plate Contact local power company for correction of improper voltage See unit rating plate 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 may fluctuate above or below permissible limits NOTE Use copper wire only between disconnect switch and unit ROUTE GROUND AND POWER WIRES 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 Remove access panel to gain access to unit wiring Extend wires from disconnect through power wiring hole provided and into unit control box 5000 4500 T LEAK IN n 200 F SYSTEM 3000 2500 2000 E ZO 50 KET va TIGHT 500 DRY SYSTEM DOR 2 34 56 7 MINUTES A95424 Fig 7 Deep Vacuum Graph v v v v v v v CHECK FOR TIGHT DRY SYSTEM RE OLOS DEEP VACUUM v A95425 Fig 8 Triple Evacuation Method 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 w
9. to ensure wires are not in contact with tubing sheet metal etc Step 9 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 if refrigerant tubing is longer than 50 ft Refer to Application Guideline and Service Manual Residential Split System Air Conditioners and Heat Pumps using Puron Refrigerant Step 10 Instail Electrical Accessories Refer to the individual instructions packaged with kits or acces sories when installing Step 11 Start Up A CAUTION 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 vent refrigerant to atmosphere Recover during system repair or final unit disposal Do not disable low pressure switch In scroll compressor applications eDome temperatures may be hot 4 CAUTION To prevent personal injury wear safety glasses protective clothing and gloves when handling refrigerant and observe the following Back seating service valves are not equipped with Schrader valves Fully back seat counterclockwise valve stem before removing gage port cap Front seating service valves are equipped with Schrader valves
10. E OF PISTON 1 Pump system down to 2 psig and recover refrigerant 2 Remove hex nut from piston body Use backup wrench on fan coils 3 Remove and discard factory installed piston Be sure Teflon seal is in place 4 Reinstall hex nut Finger tighten nut plus 1 2 turn NOTE Ifthe piston is not removed from the body TXV will not function properly 4 CAUTION To prevent damage to the unit use a brazing shield and wrap TXV with wet cloth or use heat sink material 5 Install TXV on indoor coil liquid line Sweat swivel adapter to inlet of indoor coil and attach to TXV outlet Use backup wrench to avoid damage to tubing or valve Sweat inlet of TXV marked IN to liquid line Avoid excessive heat which could damage valve 6 Install vapor elbow with equalizer adapter to suction tube of line set and suction connection to indoor coil Adapter has a 1 4 in male connector for attaching equalizer tube 7 Connect equalizer tube of TXV to 1 4 in equalizer fitting on vapor line adapter 8 Attach TXV bulb to horizontal section of suction line using clamps provided Insulate bulb with field supplied insulation tape See Fig 5 for correct positioning of sensing bulb 9 Proceed with remainder of unit installation REPLACING TXV ON R 22 INDOOR COIL 1 Pump system down to 2 psig and recover refrigerant 2 Remove coil access panel and fitting panel from front of cabinet 3 Remove TXV support clamp using a 5 16 in nut dr
11. ION These words are used with the safety alert symbol DANGER 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 NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation 4 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 systems operate at higher pressures than standard R 22 systems Do not use R 22 service equipment or com ponents on Puron equipment 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 M Ensure that vapor and liquid tube diameters are appropriate for unit capacity
12. NT 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 Check 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 5 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 Roof mounted units exposed to winds above 5 mph may require wind baffles Consult the Application Guideline and Service Manual 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 m ft per compressor manufacturer 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 a 6 in clearance on side
13. R 24 VAC HOT 24 VAC HOT RE E R rm 24 VAC COM 24 VAC COM n HEAT STAGE 1 HEAT STAGE 1 WAV JR i a COOL STAGE 1 COOL STAGE 1 Y Y2 INDOOR FAN INDOOR FAN Fig 11 Generic Wiring Diagram See Thermostat Installation Instructions for wiring specific unit combinations A02326 LEGEND 24 V FACTORY WIRING 24 V FIELD WIRING FIELD SPLICE CONNECTION CONTACTOR A97368 10 ll 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 e 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 HFC 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 w
14. alizer fitting 5 Proceed with remainder of unit installation A CAUTION Remove indoor coil piston if unit is to be installed on system with a TXV metering device Step 7 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 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 10 O CLOCK 2 O CLOCK Z 3 SUCTION TUBE 4 8 O CLOCK K 4 O CLOCK IN OD amp SMALLER LARGER THAN IN OD A81032 Fig 5 Position of Sensing Bulb A CAUTION If ANY refrigerant tubing is buried provide a 6 in vertical tise at service valve Refrigerant tubing lengths up to 36 in may be buried without further special consideration Do not bury lines for lengths over 36 in A CAUTION To prevent damage to unit or service valves observe the following e 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 ca
15. art kit capacitor and relay must be used For the appropriate accessory hard start kit see the Product Data Digest Step 6 TXV Installation S8ETG and 38ESG Required NOTE All 38ETG and 38ESG units MUST be installed with a hard shut off Puron TXV The thermostatic expansion valve is specifically designed to operate with Puron Do not use an R 22 TXV An existing R 22 TXV must be replaced with a factory approved TXV specifically designed for Puron To replace an R 22 TXV refer to Installa tion Instructions packaged with accessory kit NOTE FK4 and FC4 fan coils are equipped with an R 22 TXV Han FK4 or an FC4 fan coil is used with a Puron air conditioner the R 22 TXV must be replaced with a Puron TXV 1346 IN BRASS HEX NUT STRAINER PISTON ra DISTRIBUTOR Cee E Ma TEFLON SEAL M PISTON RING PISTON RETAINER K 34 IN BRASS COPPER TUBE HEX BODY A01164 Fig 4 AccuRater Components 38EZG Use 4 CAUTION Remove indoor coil piston if unit is to be installed on system with a TXV metering device IMPORTANT The TXV should be mounted as close to the indoor coil as possible and in a vertical upright position Avoid mounting the inlet tube vertically down Valve is more susceptible to malfunction due to debris if inlet tube is facing down A factory approved filter drier must be installed in the liquid line INSTALLING TXV IN PLAC
16. efrigerant grade tubing 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 Service valves are closed from factory and ready for brazing After wrapping service valve and filter drier with a wet cloth braze sweat connections using industry accepted methods and materials Consult local code requirements Refrigerant tubing and indoor coil are now ready for leak testing This check should include all field and factory joints EVACUATE REFRIGERANT TUBING AND INDOOR COIL A CAUTION To avoid compressor damage never use the system compres sor 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 Always break a vacuum with dry 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 7 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 8 and proceed as follows 1 Pump sy
17. hen 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 9 CONNECT CONTROL WIRING Route 24v control wires through control wiring grommet and connect leads to control wiring See Fig 11 Use No 18 AWG color coded insulated 35 C minimum wire If thermostat is located more than 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 24v 40va minimum 6 DISCONNECT PER N E C AND OR LOCAL CODES s CONTACTOR ae ee oe FIELD POWER See Sete A 3 PHASE ONLY BLUE kal da nl eo m N S FIELD GROUND a WIRING GROUND LUG A94025 Fig 9 Line Power Connections NOTE Use of available 24v accessories may exceed the mini mum 40va 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
18. install the factory supplied liquid line fil ter 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 discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 PC 101 Catalog No 533 80079 Tab 3a 2a Printed in U S A Form 38ESG 1SI Pg 1 11 02 Replaces New NOTE Avoid contact between tubing and structure OUTDOOR WALL INDOOR WALL pears i a TUBE X L VAPOR TUBE INSULATION THROUGH THE WALL l JOIST P HANGER STRAP MSE AROUND VABOR INSULATION ae VAPOR TUBE ma ue on oC Jel Co a a 17 MIN M LIQUID TUBE Fig 2 Connecting Tubing Installation SUSPENSION A01383 INSTALLATION Specifications for this unit in residential new construction market require the outdoor unit indoor unit refrigerant tubing sets metering device and filter drier listed in presale literature There can be no deviation Consult the Application Guideline and Service Manual 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 i Check Equipment and Job Site UNPACK UNIT Move to final location Remove carton taking care not to damage unit INSPECT EQUIPME
19. iver Save the clamp 4 Remove R 22 TXV using a backup wrench on flare connec tions to prevent damage to tubing 5 Using wire cutters cut equalizer tube off flush with vapor tube inside cabinet 6 Remove bulb from vapor tube inside cabinet 7 Braze equalizer stub tube closed Use protective barrier as necessary to prevent damage to drain pan IMPORTANT Route the equalizer tube of Puron TXV through suction line connection opening in fitting panel prior to replacing fitting panel around tubing 8 Install TXV with 3 8 in copper tubing through small hole in service panel Use wrench and backup wrench to avoid damage to tubing or valve to attach TXV to distributor 9 Reinstall TXV support clamp removed in item 3 10 Attach TXV bulb to vapor tube inside cabinet in same location as original was when removed using supplied bulb clamps nylon or copper See Fig 5 for correct positioning of sensing bulb I Route equalizer tube through suction connection opening large hole in fitting panel and install fitting panel in place 2 Sweat inlet of TXV marked IN to liquid lime Avoid excessive heat which could damage valve 3 Install vapor elbow with equalizer adapter to vapor line of line set and vapor connection to indoor coil Adapter has a 1 4 in male connector for attaching equalizer tube 4 Connect equalizer tube of TXV to 1 4 in equalizer fitting on vapor line adapter Use backup wrench to prevent damage to equ
20. of unit and 12 in on all remaining sides must 36 D 9 53 TIEDOWN KNOCKOUTS 2 PLACES A B A94199 DIMENSIONS IN UNIT BASE PAN TIEDOWN KNOCKOUT LOCATIONS DIMENSIONS A B G 22 1 2 X 22 1 2 3 11 16 18 1 8 14 3 8 30 X 30 6 1 2 23 1 2 20 Fig 3 Mounting Unit to Pad 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 Step 4 Operating Ambients ini r ating ambient in cooling mode is 55 F The minimum outdoor operating ambient in cooling mode is 55 F and the maximum outdoor operating ambient in cooling mode is 125 F Step 5 Check Indoor AccuRater Piston and install Piston Ring 38EZG Standard If unit is to be installed with a piston metering device proceed as follows 1 Check indoor coil piston to see if it matches the required piston shown on outdoor unit rating plate If it does not match replace indoor coil piston with piston shipped with outdoor unit The piston shipped with outdoor unit is correct for any approved indoor coil combination in After correct piston is installed locate Teflon piston ring shipped in piston bag Install piston ring behind metering piston as shown in Fig 4 The piston ring ensures that piston stays seated during all operating conditions NOTE If a Puron TXV is used with a Puron reciprocating compressor an appropriate accessory hard st
21. on Diameter Tube Diameter Connection Diameter Tube Diameter 018 024 3 8 3 8 5 8 5 8 3 4 030 036 3 8 3 8 3 4 3 4 7 8 042 048 3 8 3 8 7 8 7 8 1 1 8 060 3 8 3 8 7 8 NOTES 1 Tube diameters are for lengths up to 50 ft For tubing lengths greater than 50 ft horizontal or greater than 20 ft vertical differential consult the Application Guideline and Service Manual Air Conditioners and Heat Pumps Using Puron Refrigerant 2 Do not apply capillary tube indoor coils to these units Table 2 Accessory Usage REQUIRED FOR REQUIRED FOR REQUIRED FOR LOW AMBIENT LONG LINE SEA COAST ALOES ORT APPLICATIONS APPLICATIONS APPLICATIONS BELOW 55 F OVER 50 FT WITHIN 2 MILES Crankcase Heater Yes Yes o Evaporator Freeze Thermostat Yes No No Winter Start Control ji Yest No o Accumulator No No o Compressor Start Assist Capacitor and Relay ues Yes MotorMaster Control or Yes o o Low Ambient Pressure Switch Wind Baffle See low ambient instructions o o Coastal Filter No o Yes Liquid Line Solenoid Valve See Long Line or No Application o Hard Shutoff TXV Guideline Bail Bearing Fan Motor Yest o o For tubing line sets between 50 and 175 ft refer to Application Guideline and Service Manual Air Conditioners and Heat Pumps Using Puron Refrigerant Only when low pressure switch is used Required for low ambient controller full
22. orking pressures less than 600 psig Do not install a suction line filter drier in liquid line 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 TXV If indoor unit is equipped with an R 22 TXV it must be changed to a Puron TXV 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 2002 CARRIER Corp 7310 W Morris St Indianapolis IN 46231 38esqisi aE EEE O O O C l Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 4 Tab 3a 2a PC 101 Catalog No 533 80079 Printed in U S A Form 38ESG 1S Pg 12 11 02 Replaces New
23. pacity and performance losses can occur Following the recommendations in the Application Guideline and Service Manual Residential Split System Air Conditioners and Heat Pumps Using Puron Refrigerant will reduce these losses Refer to Table for field tubing diameters Refer to Table 2 for accessory requirements No buried line applications greater than 36 in If refrigerant tubes or indoor coil are exposed to atmosphere they must be evacuated to 500 microns to eliminate contamination and moisture in the system OUTDOOR UNIT CONNECTED TO FACTORY APPROVED INDOOR UNIT Outdoor unit contains correct system refrigerant charge for opera tion with ARI rated indoor unit with highest sales volume when connected by 15 ft of field supplied or factory accessory tubing Check refrigerant charge for maximum efficiency INSTALL LIQUID LINE FILTER DRIER 4 CAUTION To avoid compressor damage and performance loss due to plugged circuits and expansion device installation of filter drier in liquid line is required Refer to Fig 6 and install filter drier as follows 1 Braze 5 in connector tube to liquid service valve Wrap filter drier with damp cloth 2 Braze filter drier between connector tube and liquid tube to indoor coil Flow arrow must point towards indoor coil REFRIGERANT TUBING Connect vapor tube to fitting on outdoor unit vapor service valves Connect liquid tube to filter drier See Fig 6 and Table 1 Use r
24. r wet bulb temperature At this intersection note superheat 7 Refer to Table 6 Find superheat temperature located in item 6 and suction pressure At this intersection note suction line temperature Table 4 Required Liquid Line Temperature F REQUIRED SUBCOOLING LIQUID TEMPERATURE PRESSURE AT CF SERVICE VALVE 8 10 12 14 16 18 189 58 56 54 52 50 48 195 60 58 56 54 52 50 202 62 60 54 52 208 64 62 56 54 215 66 64 58 56 222 68 66 60 58 229 70 68 62 60 236 72 70 64 62 243 74 72 66 64 251 76 74 68 66 259 78 76 70 68 266 80 78 72 70 274 82 80 74 72 1 Ensure that all wiring and tubing is secure in unit before adding panels and covers Securely fasten all panels and covers BO Tighten service valve stem caps to 1 12 turn past finger tight 3 Leave User s Manual with owner Explain system operation and periodic maintenance requirements outlined in manual 4 Fill out Dealer Installation Checklist and place in customer file CARE AND MAINTENANCE For continuing high performance and to minimize possible equip ment failure periodic maintenance must be performed on this equipment Frequency of maintenance may vary depending upon geographic areas such as coastal applications See User s Manual for infor
25. stem down to 28 in of mercury and allow pump to continue operating for an additional 15 minutes BO 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 hr During this time dry nitrogen will be able to diffuse throughout the system absorbing moisture 5 Repeat this procedure as indicated in Fig 8 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 8 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 LIQUID LINE FILTER DRYER CONNECTOR TUBE Fig 6 Liquid Line Filter Drier A99331 Table 1 Refrigerant Connections and Recommended Liquid Line and Vapor Tube Diameters In UNIT LIQUID VAPOR VAPOR LONG LINE SIZE Connection Diameter Tube Diameter Connecti
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