13HPX Series - HvacPartsShop.com
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1. INDOOR UNIT MATCHUPS 13HPX XXX 230 04 CH33 31A 31B 10 5 218 CH33 36B 10 5 olo Table 8 13HPX 018 0 PES Target INDOOR MATCHUPS vd CH33 42 10 5 2 8 GSF ef Ib oz CH33 44 48B 10 5 2 10 CBX26UH 018 14 9 3 99 452 CBX32MV 018 024 230 12 12 0 NOGE MATEHUES CBX32MV 024 030 230 12 19 Table 9 13HPX 024 CR33 30 86 9 arget Add INDOOR MATCHUPS Subcooling charge ate Heat Cool Eales CR33 50 60 10 5 2 10 ETP CX34 36B 10 5 0 1 2 CX34 38 SN 6007 and after 5 5 2 7 CX34 38 before SN 6007 10 5 2 7 CBX32M 030 14 15 115 m TUNE CBX32MV 018 024 14 15 0 9 XA o c CBX32MV 024 030 14 15 115 a HET Table 12 13HPX 042 CH33 36A 14 15 0 8 Subceoling chase CH WE a T slo INDOOR MATCHUPS Heat Cool S 5 F 1 F oz CH33 36C 14 15 14 CBX26UH 042 26 5 1 1 CR33 30 36 20 16 1 0 CBX26UH 048 10 12 4 5 CX34 25 14 15 0 9 CBX27UH 042 230 10 6 4 5 CX34 31 14 15 115 CBX27UH 048 230 10 6 4 5 CX34 36 14 15 0 4 CBX32M 036 042 15 5 0 0 NUR a CBX32MV 048 230 10 6 4 5 INDOOR MATCHUPS Heat Cool CH33 43C 48C 10 6 1 1 5 F 1 Ib oz CH33 49C 50 60 10 6 4 5 CBX26UH 030 22 6 117 15 B Am d CBX26UH 036 25 4 1 X WIE CBX27UH 030 230 15 4 1 55 5 zls 270 036 230 15 4 1 SEA2. GROUNDING DEFROST LUG CONTROL CMC1 FIGURE 2 A Control Box Figure 2 13HPX units are not equipped with a 24V transformer All 24 VAC controls are powered by the indoor unit Refer to wiring diagram Electrical openings are provided under the control box cov er Field thermostat wiring is made to a 24V terminal strip located on the defrost control board located in the control box See figure 3 24V THERMOSTAT TERMINAL STRIP JO FIGURE 3 1 Compressor Contactor K1 The compressor is energized by a contactor located in the control box See figure 2 Single pole contactors are used in 13HPX series units See wiring diagrams for specific unit K1 is energized through the CMC1 board by the in door thermostat terminal Y1 24V when thermostat de mand is present DANGER Electric Shock Hazard May cause injury or death Disconnect all remote electrical power supplies before opening unit panel Unit may have multiple power supplies Some units are equipped with single pole contactors When unit is equipped with a single pole contactor line voltage is present at all components even when unit is not in operation 2 Dual Capacitor C12 The compressor and fan 13HPX series units use permanent split capacitor motors The capacitor is lo
3. Obs Compressor Qs Delay Pins K2 RELAY m wi 24v terminal 1 stri M P Reversin T Valve Low Pressure Switch 587 Defrost Thermostat RELAY sTIsIsIsIsIs E TST PS DF C R O YI High Pressure Switch S4 FIGURE 4 Defrost Control Timing Pins Each timing pin selection provides a different accumu lated compressor run time period for one defrost cycle This time period must occur before a defrost cycle is initi ated The defrost interval can be adjusted to 30 T1 60 T2 or 90 T3 minutes see figure 4 The defrost timing jumper is factory installed to provide a 60 minute defrost Page 5 interval on the 5 ton unit but a 90 minute defrost interval on all other 13HPX size units If the timing selector jump er is not in place the control defaults to a 90 minute de frost interval The maximum defrost period is 14 minutes and cannot be adjusted A TEST option is provided for troubleshooting The TEST mode may be started any time the unit is in the heating mode and the defrost thermostat is closed or jumper ed If the jumper is in the TEST position at power up the control will ignore the test pins When the jumper is placed across the TEST pins for two seconds the control will enter the defrost mode If the jum
4. ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW FIGURE 11 A Plumbing Field refrigerant piping consists of liquid and vaporlines from the outdoor unit sweat connections Use Lennox L15 sweat series line sets as shown in table 3 TABLE 3 Refrigerant Line Sets Fiel Hus NE Recommended Line Set p 3 8 in 3 4 in e Nos atn ac 030 10 19 19 4 6 m 15 m 1 3 8 in _ 7 8 uM em 048 10 mm 22mm mm 22 mm 4 6 m 15 m 060 3 8 in 1 1 8 in 10 41 8 in Field 061 10 mm 29 mm mm 29 mm Fabricated B Service Valves A IMPORTANT Only use Allen wrenches of sufficient hardness 50Rc Rockwell Harness Scale min Fully in sert the wrench into the valve stem recess Service valve stems are factory torqued from 9 ft Ibs for small valves to 25 ft 155 for large valves to prevent refrigerant loss during ship ping and handling Using an Allen wrench rated less 50Rc risks rounding breaking off the wrench or stripping the valve stem recess The liquid and vapor line service valves figures 12 and 13 and gauge ports are accessible from outside the unit Page 9 Each valve is equipped with a service port The service ports are used for leak testing evacuating charging and checking charge A Schrader valve is factory installed A service port cap is supplied to protect the Schrader valve from contamina tion and serve as th
5. LENNOX gt Service Literature UNIT INFORMATION Corp 0619 L4 Revised 04 2009 13HPX 1 5 to 5 ton 13HPX SERIES UNITS The 13HPX is a residential split system heat pump series is designed for use with expansion valves TXV and R 410A refrigerant All 13HPX units utilize scroll compressors 13HPX series units are available in 1 1 2 2 2 1 2 3 3 1 2 4 and 5 ton capacities All major components indoor blower and coil must be matched according to Lennox rec ommendations for the compressor to be covered under warranty Refer to the Engineering Handbook for approved system matchups This manual is divided into sections which discuss the major components refrigerant system charging proce dure maintenance and operation sequence Information contained in this manual is intended for use by qualified service technicians only All specifications are subject to change ELECTROSTATIC DISCHARGE ESD Precautions and Procedures CAUTION Electrostatic discharge affect electronic components Take precautions during unit instal lation and service to protect the unit s electronic controls Precautions will help to avoid control exposure to electrostatic discharge by putting the unit the control and the technician at the same electrostatic potential Neutralize electro static charge by touching hand and all tools on an unpainted unit surface before performing any service procedure A WARNING R
6. CBX32M 030 036 042 15 4 11 i 5 mI CBX32MV 024 030 036 15 4 1 T aim 15 CLD CX34 50 60C 10 6 1 1 CH33 31B 15 4 1 2 WIE Table 13 13HPX 048 CH33 36B 15 4 0 0 arget ada INDOOR MATCHUPS charge CH33 36C 15 4 1 Heat Cool CH33 42 15 4 1 552 1 Ib oz 5 RET CBX26UH 048 9 1 1 7 i RET CBX26UH 060 24 18 2 7 CBX27UH 048 230 11 11 1 3 eee 28 LS CBX27UH 060 230 24 18 2 7 CX34 38 SN 6007 and after 4 4 1 a Tis betore SN 600r 2 2 CBX32M 060 1 1 1 3 5 CBX32MV 048 11 11 1 3 Table 11 13HPX 036 CBX32MV 060 230 11 1 113 Target CH33 43C 18 7 0 0 Subcooling INDOOR MATCHUPS pea Gaal CH33 49C 50 60C 11 1 113 5 F 1 F Ib oz CH33 60D 11 11 o 9 CBX26UH 036 17 10 2 7 CH33 62D 11 1 1 10 270 036 230 10 5 2 7 CR33 50 60 25 7 0 9 CBX27UH 042 230 10 10 2 13 CR33 60 25 7 0 9 CBX32M 036 042 10 5 2 7 CX34 49 11 1 1 1 CBX32MV 036 230 10 5 2 CX34 60D 11 1 0 9 14 Table 14 13HPX 060 Table 18 13HPX 036 Target Target INDOOR MATCHUPS INDOOR MATCHUPS na eoe 5 F 1 F 5 2 1 F CBX26UH 060 10 CBX26UH 036 14 10 CBX27UH 060 230 10 CBX27UH 036 230 10 5 CBX32MV 060 10 CBX27UH 042 230 10 10 CBX32MV 068 10 CBX32M 036 042 10 5 CH33 60D 10 CBX32MV 036 230 10 CH33 62D 10 CH33 31A 31B 10 CX34 62D 10 CH33 36B 10 Amount of charge required in additional to cha
7. motor shaft should be flush with hub See figure 9 Drip loops should be used in wiring when ser vicing motor D Reversing Valve L1 and Solenoid A refrigerant reversing valve with electromechanical so lenoid is used to reverse refrigerant flow during unit op eration The reversing valve requires no maintenance The only replaceable part is the solenoid If the reversing valve itself has failed it must be replaced If replacement is necessary access reversing valve by re moving the outdoor fan motor Refer to figure 9 E High Pressure Switch S4 A IMPORTANT Pressure switch settings for R 410A refrigerant will be significantly higher than units with R 410A An auto reset single pole single throw high pressure switch is located in the liquid line This switch shuts off the compres sor when liquid line pressure rises above the factory setting The switch is normally closed and is permanently adjusted to trip open at 590 15 psi F Low Pressure Switch S87 An auto reset single pole single throw low pressure Switch is located in the suction line This switch shuts off the compressor when suction pressure drops below the facto ry setting The switch is closed during normal operating pressure conditions and is permanently adjusted to trip Page 7 open at 25 5 psi The switch automatically resets when suction line pressure rises above 40 5 psi Under certain conditions the low pressure switch is ignored See
8. manifold 2 Open high pressure valve on gauge manifold and pressurize line set and indoor coil to 150 psig 1034 kPa 3 Check lines and connections for leaks Page 10 preferred method is to use an electronic leak or Halide detector Add a small amount of R 410A 3 to 5 psig 20kPa to 34kPa then pressurize with nitrogen to 150 psig 4 Release nitrogen pressure from the system correct any leaks and recheck WARNING Fire Explosion and Personal Safety Hazard Failure to follow this warning could result in damage personal injury or death Never use oxygen to pressurize or purge refrigeration lines Oxygen when exposed to a spark or open flame can cause damage by fire and or an explosion that can result in ersonal injury or death WARNING Danger of explosion When using a high pressure gas such as dry nitrogen to pressurize a refriger ant or air conditioning system use a regulator that can control the pressure down to 1 or 2 psig 6 9 to 13 8 kPa C Evacuating the System 1 Attach gauge manifold Connect vacuum pump with vac uum gauge to center port of gauge manifold With both manifold service valves open start pump and evacuate indoor coil and refrigerant lines A IMPORTANT A temperature vacuum gauge mercury vacuum U tube or thermocouple gauge should be used The usual Bourdon tube gauges not accurate enough in the vacuum range A IMPORTANT The compre
9. 16 2 22 26 4 1 3 45500 830 307 298 208 230V 60 34 6 26 3 134 0 98 1 8 2 9 94M94 Low Ambient Kit 54M89 Low Pressure Switch Bypass Thermostat 13W07 Mild Weather Kit 33M07 Monitor Service Light 76253 Mounting 69J07 Outdoor Ther Thermostat 56A87 Hore cH HERE Freezestat 3 8 in tubing 93G35 5 8 in tubing 50A93 Hail Guards 12 21 92 90 92 94 pin 45 4 BRE PP INE ET 58 mastat Kif Mounting Box s __ Refrigerant L15 65 30 L15 65 40 Field Fabricate Time Delay Relay Kit mw Unit Stand OFF Ki am o 1 NOTE Extremes of operating range are plus 10 and minus 5 of line voltage 1 Sound Rating Number rated in accordance with test conditions included in ARI Standard 270 Refrigerant charge sufficient for 15 ft length of refrigerant lines 3 HACR type circuit breaker or fuse Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements 5 Crankcase Heater and Freezestat are recommended with Low Ambient Kit Page 3 1 UNIT COMPONENTS Unit components are illustrated in figure 1 13HPX UNIT COMPONENTS low pressure switch condenser fan located on suction line txv valve high pressure switch reversing valve o liquid line hidden DUAL CAPACITOR C12 COMPRESSOR CONTACTOR K1
10. 6 1 0 CBX27UH 042 230 10 6 4 5 CX34 25 14 15 ol9 CBX27UH 048 230 10 6 4 5 CX34 31 14 15 115 CBX32M 036 042 15 5 0 0 CX34 36 14 15 0 4 CBX32MV 036 15 5 olo Table 17 13HPX 030 CBX32MV 048 230 10 6 4 5 Target CH33 43C 48C 10 6 1 1 INDOOR MATCHUPS ve CH33 49C 50 60C 10 6 415 1 Ib CH33 60D 10 6 2 6 CBX26UH 030 19 6 CR33 48 32 5 0l5 CBX26UH 036 25 CR33 50 60 32 9 2 6 CBX27UH 030 230 15 CR33 60 32 9 2 6 CBX27UH 036 230 15 CX34 43C 10 6 111 CBX32M 030 036 042 15 CX34 49 10 6 3 7 CBX32MV 024 030 036 15 CX34 50 60C 10 6 111 CH33 25B 15 CH33 31B 15 CH33 36A 15 CH33 36B 15 CH33 36C 15 CH33 42 15 CR33 30 36 20 CX34 25 31 15 CX34 36 28 CX34 38 SN 6007 and after 4 CX34 38 before SN 6007 20 CX34 42 28 CO CO Of CO CO OF OF CO CO CO CO CO CO OF CO OF CF wj RB 5 05 45 45 5 45 5 5 5 45 5 5 5 15 Table 20 13HPX 048 Table 21 13HPX 060 Target Add Target INDOOR MATCHUPS charge INDOOR MATCHUPS ppubcooling charge 5 F 1 Ib 5 F 1 F Ib oz CBX26UH 048 11 11 1 CBX26UH 060 8 11 1 7 CBX26UH 060 24 18 2 CBX27UH 060 230 10 9 0 13 CBX27UH 048 230 11 11 1 CBX32MV 060 10 9 olo CBX27UH 060 230 24 18 2 CBX32MV 068 10 9 ol 9 CBX32M 048 11 11 1 CH33
11. 60D 10 9 olo CBX32M 060 11 11 1 CH33 62D 10 9 0 1 CBX32MV 048 11 11 1 CX34 62D 10 9 0 6 CBX32MV 060 230 11 11 1 CH3343C 0 IMPORTANT CH33 49C 50 60 11 11 1 CH33 60D 1 1 0 Use the following tables general guide when CH33 62D 1 1 1 forming maintenance checks This is not a proce CR33 50 60 25 7 0 dure for charging the unit Refer to Charging Check CR33 60 25 7 0 ing Charge section Minor variations in these pres CX34 49 11 1 1 sures may be expected due to differences in installa CX34 60D 1 1 0 tions Significant differences could mean that the system is not properly charged or that a problem ex ists with some component in the system Table 22 Normal Operating Pressures 10 4 Vapor 5 PSIG 13HPX XXX 230 04 13HPX 018 13HPX 024 13HPX 030 13HPX 036 13HPX 042 13HPX 048 13HPX 060 F C Liq Vap Liq Vap Liq Vap Liq Vap Liq Vap Liq Vap Liq Vap Cooling 65 18 234 142 258 140 238 137 260 136 231 135 246 134 256 116 75 24 273 144 299 142 278 138 303 140 267 138 286 136 298 123 85 29 316 145 347 145 322 140 348 143 314 140 330 138 345 131 95 35 365 148 399 148 369 143 398 145 367 143 379 140 395 135 105 41 421 151 460 150 425 144 452 148 414 146 432 143 450 138 115 45 492 152 534 152 487 147 512 151 473 148 492 146 512 141 These are most popular match up pressures Indoor match
12. ENCE This is the sequence of operation for 13HPX series units The sequence is outlined by numbered steps which corre spond to circled numbers on the adjacent diagram The steps are identical for both cooling and first stage heating demand with the exception reversing valve L1 is energized during cooling demand and de energized during heating demand NOTE The thermostat used may be electromechan ical or electronic NOTE Transformer in indoor unit supplies power 24 to the thermostat and outdoor unit controls COOLING Internal thermostat wiring energizes terminal O by cooling mode selection energizing the reversing valve 11 1 Demand initiates at Y1 in the thermostat 2 24VAC energizes compressor contactor K1 3 K1 1 closes energizing compressor B1 and out door fan motor B4 END OF COOLING DEMAND 4 Demand is satisfied Terminal Y1 is de energized 5 Compressor contactor K1 is de energized 6 K1 1 opens and compressor B1 and outdoor fan motor B4 are de energized and stop immediate ly FIRST STAGE HEAT Internal thermostat wiring de energizes terminal O by heating mode selection de energizing the reversing valve L1 See steps 1 2 and 3 End of FIRST STAGE HEAT See steps 4 5 and 6 DEFROST MODE 7 During heating operation when outdoor coil temperature drops below 42 5 5 C defrost switch thermostat S6 closes 8 Defrost control CMC1 begins timing If defrost ther mo
13. O INDOOR COIL CAP SCHRADER VALVE OPEN TO LINE SET WHEN VALVE IS CLOSED FRONT SEATED VALVE FRONT SEATED FIGURE 12 Vapor Line Ball Type Service Valve A ball type full service valve is used on 13HPX Valves are not re buildable If a valve has failed it must be replaced A ball valve is illustrated in figure 13 The ball valve is equipped with a service port A Schrader valve is factory installed A service port cap is supplied to pro tect the Schrader valve from contamination and assure a leak free seal SUCTION LINE BALL TYPE SERVICE VALVE VALVE OPEN USE ADJUSTABLE WRENCH ROTATE STEM CLOCKWISE 90 TO CLOSE ROTATE STEM COUNTER CLOCKWISE 90 TO OPEN STEM CAP TO COMPRESSOR FIGURE 13 Ill CHARGING A Pumping Down System CAUTION vacuum operation operating compressor at 0 psig or lower can cause internal fusite arcing resulting in a damaged or failed compressor This type of damage will result in denial of warranty claim The system may be pumped down when leak checking the line set and indoor coil or making repairs to the line set or indoor coil 1 Attach gauge manifold 2 Front seat close liquid line valve 3 Start outdoor unit 4 Monitor suction gauge Stop unit when 0 psig is reached 5 Front seat close suction line valve B Leak Testing To Be Done Before Evacuating 1 Attach gauge manifold and connect a drum of dry nitro gen to center port of gauge
14. Pres sure Switch Circuit in the Defrost Control description G Drier A filter drier designed for all 13HPX model units is factory installed in the liquid line The filter drier is designed to re move moisture and foreign matter which can lead to com pressor failure Moisture and or Acid Check Because POE oils absorb moisture the dryness of the system must be verified any time the refrigerant sys tem is exposed to open air A compressor oil sample must be taken to determine if excessive moisture has been introduced to the oil Table 2 lists kits available from Lennox to check POE oils If oil sample taken from a system that has been exposed to open air does not test in the dry color range the filter drier MUST be replace IMPORTANT Replacement filter drier MUST be approved for R 410A refrigerant and POE application Foreign Matter Check It is recommended that a liquid line filter drier be replaced when the pressure drop across the filter drier is greater REFRIGERANT SYSTEM than 4 psig To safeguard against moisture entering the system follow the steps in section sub section C Evacuating the System when replacing the drier H Crankcase Heater HR1 amp Thermostat S40 options Crankcase heater HR1 is an option for all size units while thermostat 540 is an option for 5 ton units only HR1 is a 40 watt heater that prevents liquid from accumulating in the compressor In the 13HPX 060 5 ton
15. by any pressure switch wired to the control board In addi tion the diagnostic LEDs will indicate a locked out pres sure switch after the fifth occurrence of an open pressure switch see Table 1 The unit will remain locked out until power to the board is interrupted then re established or until the jumper is applied to the TEST pins for 0 5 seconds NOTE The defrost control board ignores input from the low pressure switch terminals as follows e during the TEST mode during the defrost cycle e during the 90 second start up period e and for the first 90 seconds each time the reversing valve switches heat cool modes If the TEST pins are jumpered and the 5 minute delay is being by passed the LO PS terminal signal is not ignored during the 90 second start up period Diagnostic LEDs The defrost board uses two LEDs for diagnostics The LEDs flash a specific sequence according to the condition TABLE 1 Defrost Control Board Diagnostic LED Red LED DS1 No power to control OFF OFF Simultaneous Slow FLASH Mode Green LED DS2 Normal operation power to control Anti short cycle lock out 5 minute Alternating Slow FLASH Low pressure switch OFF Slow FLASH fault Low pressure switch OFF ON lockout High pressure switch Slow FLASH fault High pressure switch ON lockout B Compressor All 13HPX units utilize a scroll compressor The scroll com pressor design i
16. cated inside the unit control box see figure 2 A single dual capacitor C12 is used for both the fan motor and the compressor see unit wir ing diagram The fan side and the compressor side of the ca pacitor have different MFD ratings Page 4 3 Defrost System The 13HPX defrost system includes two components a defrost thermostat and a defrost control Defrost Thermostat The defrost thermostat is located on the liquid line between the check expansion valve and the distributor When de frost thermostat senses 42 F 5 5 C or cooler the thermo stat contacts close and send a signal to the defrost control board to start the defrost timing It also terminates defrost when the liquid line warms up to 70 F 21 C Defrost Control The defrost control board includes the combined functions of a time temperature defrost control defrost relay diag nostic LEDs and terminal strip for field wiring connections See figure 4 The control provides automatic switching from normal heating operation to defrost mode and back During com pressor cycle call for defrost the control accumulates compressor run times at 30 60 or 90 minute field adjust able intervals If the defrost thermostat is closed when the selected compressor run time interval ends the defrost relay is energized and defrost begins 13HPX Outdoor Unit Defrost Control Board i bp KI RELAY H Test Pins
17. d in ARI Standard 270 Refrigerant charge sufficient for 15 ft length of refrigerant lines 3 HACR type circuit breaker or fuse Refer to National or Canadian Electrical Code manual to determine wire fuse and disconnect size requirements 5 Crankcase Heater and Freezestat are recommended with Low Ambient Kit Page 2 SPECIFICATIONS General Model No 13HPX 042 13HPX 048 13HPX 060 Data Nominal Tonnage 3 5 4 5 Sound Rating Number 8 80 80 Connections Liquid line o d in 3 8 3 8 3 8 sweat Vapor line o d in 7 8 7 8 1 1 8 Refrigerant R 410A charge furnished 10 Ibs 10 oz 13 Ibs 2 oz 15 Ibs 3 oz Outdoor Net face area Outer coil 24 50 Coil sq ft Inner coil 23 56 Tube diameter in 5 16 No of rows 2 Fins per inch 22 Outdoor Diameter in 22 Fan No of Blades 4 Motor hp 1 4 Cfm 3830 Rpm 825 Watts 330 Shipping Data 165 1 package 220 250 255 ELECTRICAL DATA Line voltage data 60 hz 1ph 208 230V 208 230V 208 230V 3 Maximum overcurrent protection amps 40 50 60 Minimum circuit ampacity 24 1 28 9 34 6 Compressor Rated Load Amps 26 3 Locked Rotor Amps 134 Power Factor 0 98 Outdoor Full Load Amps 1 7 Fan Motor Locked Rotor Amps 3 1 OPTIONAL ACCESSORIES must be ordered extra Compressor Crankcase Heater Factory Compressor Hard Start Kit 88M91 Compressor Low Ambient Cut Off 45 08 Compressor Sound Cover 69J03 13HPX 061 5 80 3 8 1 1 8 15 Ibs 9 oz 29 09 28 16 5
18. damage See compressor nameplate and ELECTRICAL DATA table on page 2 for compressor specifications Page 6 SUCTION lt ORBITING SCROLL STATIONARY SCROLL SUCTION POCKET SUCTION SUCTION INTERMEDIATE PRESSURE 2 GAS CRESCENT SHAPED GAS POCKET FLANKS SEALED BY CENTRIFUGAL E FORCE J MOVEMENT OF ORBIT 3 HIGH PRESSURE GAS SUCTION D DISCHARGE POCKET FIGURE 8 CONDENSER FAN MOTOR AND COMPRESSOR ACCESS FAN GUARD Remove 7 screws ALIGN FLUSH WITH MOTOR SHAFT ON 060 UNITS REMOVE 7 SCREWS SECURING FAN GUARD HUB REMOVE FAN GUARD FAN ASSEMBLY FIGURE 9 DANGER Make sure all power is disconnected before beginning electrical service procedures Remove 4 nuts C Outdoor Fan Motor All units use single phase PSC fan motors which require a run capacitor In all units the condenser fan is controlled by the compressor contactor and defrost control during defrost cycles ELECTRICAL DATA tables in this manual show specifi cations for condenser fans used in 13HPXs Access to the condenser fan motor on all units is gained by removing the seven screws securing the fan assem bly See figure 9 The outdoor fan motor is removed from the fan guard by removing the four nuts found on the top panel If replacing outdoor fan motor on the 13HPX 060 align motor shaft 1 4 from the hub For all other 13HPX model units
19. e drop tables and procedure 4 Belt Drive Blowers Check belt for wear and proper tension 5 Check all wiring for loose connections 6 Check for correct voltage at unit blower operating 7 Check amp draw on blower motor Motor nameplate Actual At the beginning of each heating or cooling season the system should be cleaned as follows V BRAZING Before brazing remove access panels and any piping pan els to avoid burning off paint Be aware of any components ie service valves reversing valve pressure switches that may be damaged due to brazing heat When making line set connections use 1 to 2 psig dry nitro gen to purge the refrigerant piping This will help to prevent oxidation into the system AWARNING Danger of explosion cause equipment damage injury or death When using a high pressure gas such as dry nitrogen to pressurize a refrigeration or air conditioning system use a regulator that can control the pressure down to 1 or 2 psig 6 9 to 13 8 kPa 1 Cut ends of copper square free from nicks or dents Debur the ends The pipe must remain round do not pinch end of line 2 Wrap wet rag around any components that may be da maged 3 Use silver alloy brazing rods 5 or 6 percent minimum silver alloy for copper to copper brazing or 45 percent silver alloy for copper to brass or copper to steel braz ing which are rated for use with R 22 and R 410A re frigerant 4 After brazi
20. e primary leak seal NOTE Always keep valve stem caps clean To Access Schrader Port 1 Remove service port cap with an adjustable wrench 2 Connect gauge to the service port 3 When testing is completed replace service port cap Tighten finger tight then an additional 1 6 turn To Open Liquid or Vapor Line Service Valve 1 Remove stem cap with an adjustable wrench 2 Using service wrench and hex head extension 5 16 for vapor line and 3 16 for liquid line back the stem out coun terclockwise until the valve stem just touches the retaining ring 3 Replace stem cap and tighten finger tight then tighten an additional 1 6 turn A DANGER Do not attempt to backseat this valve Attempts to backseat this valve will cause snap ring to explode from valve body under pressure of refrigerant Personal injury and unit damage will result To Close Liquid or Vapor Line Service Valve 1 Remove stem cap with an adjustable wrench 2 Using service wrench and hex head extension 5 16 for vapor line and 3 16 for liquid line turn stem clockwise to seat the valve Tighten firmly 3 Replace stem Tighten finger tight then tighten an additional 1 6 turn LIQUID LINE SERVICE VALVE VALVE OPEN INSERT HEX WRENCH HERE SERVICE PORT Q SERVICE TO INDOOR COIL SCHRADER VALVE LIQUID LINE SERVICE VALVE VALVE CLOSED RETAINING RING STEM CAP SERVICE A TO COMPRESSOR SERVICE T
21. efrigerant can be harmful if it is inhaled Refrigerant must be used and recovered responsibly Failure to follow this warning may result in person al injury or death MODEL NUMBER IDENTIFICATION CAUTION In order to avoid injury take proper precaution when lifting heavy objects Table of Contents Specifications Electrical Data 2 Unit Components 4 Refrigerant 9 WW Charging oer emer mes 11 IV 14 V Brazing Procedure 14 Diagrams 15 13 HP X 024 230 2 Nominal SEER Unit Type HP Heat Pump Outdoor Unit Refrigerant X R 410A Minor Revision Number Voltage 230 208 230V 1phase 60hz Nominal Cooling Capacity 018 1 5 tons 024 2 tons 030 2 5 tons 036 3 tons 042 3 5 tons 048 4 tons 060 5 tons 061 5 tons Technical Publications Page 1 2006 Lennox Industries Inc SPECIFICATIONS General Model No 13HPX 018 13HPX 024 13HPX 030 13HPX 036 Data Nominal Tonnage 1 5 2 2 5 3 Sound Rating Number 76 76 Connections Liquid line o d in 3 8 3 8 3 8 3 8 sweat Vapor line o d in 3 4 3 4 3 4 7 8 Refrigerant R 410A charge furnished 7 105 4 oz 8 Ibs 12 oz Outdoor Net face area Outer coil 15 21 15 21 Coil sq ft Inn
22. er 14 50 Tube diameter in 5 16 5 16 No of rows 1 2 Fins per inch 22 22 Outdoor Diameter in 18 18 Fan No of Blades 3 4 Motor hp 1 5 1 5 Cfm 2400 2450 Rpm 1130 1100 Watts 166 190 Shipping Data 165 1 package 140 150 170 180 ELECTRICAL DATA Line voltage data 60 hz 1ph 208 230V 208 230V 208 230V 208 230V 3 Maximum overcurrent protection amps 20 30 30 35 Minimum circuit ampacity 12 3 17 9 18 7 21 9 Compressor Rated Load Amps 9 0 16 7 Locked Rotor Amps 48 79 Power Factor 0 96 0 98 Outdoor Full Load Amps 1 1 1 1 Fan Motor Locked Rotor Amps 1 9 1 9 OPTIONAL ACCESSORIES must be ordered extra Compressor Crankcase Heater 93M05 Compressor Hard Start Kit 10J42 88 91 Compressor Low Ambient Cut Off 45F08 Compressor Sound Cover 69J03 Freezestat 3 8 in tubing 93G35 5 8 in tubing 50A93 Hail Guards 92M89 92 88 5Low Ambient Kit 54M89 Low Pressure Switch Bypass Thermostat 13W07 Mild Weather 33M07 Monitor Kit Service Light 76F53 Mounting Base 69J06 Outdoor Thermostat 56A87 Thermostat Kit Mounting Box 31461 Refrigerant L15 41 20 L15 41 40 Line Sets L15 41 30 L15 41 50 L15 65 30 L15 65 40 15 65 50 Time Delay Relay Kit 58 81 Unit Stand Off Kit 94J45 NOTE of operating range plus 10 and minus 5 of line voltage 1 Sound Rating Number rated in accordance with test conditions include
23. ge to vapor service port high pressure gauge to liquid service port DT 22 22 20 entering 21 21 20 19 indoor coil F 19 19 18 18 17 16 16 15 temperatures are expressed in F 16 15 15 DOOR COIL Close manifold gauge set valves Connect the center man ifold hose to an upright cylinder of HFC 410A CALCULATING CHARGE If the system is void of refrigerant first locate and repair any leaks and then weigh in the refrigerant charge into the unit To calculate the total refrigerant charge Amount Adjust amt for specified variation in line set Additional charge on length table in specified per indoor Total nameplate figure 6 unit matchup tables charge Step 1 Determine the desired DT Measure entering air tempera ture using dry bulb A and wet bulb B DT is the intersecting value of A and B in the table see triangle Step 2 Find temperature drop across coil Measure the coil s dry bulb entering and leaving air temperatures A and C Temperature Drop Formula A minus Step 3 Determine if fan needs adjustment If the difference be tween the measured and the desired DT Tp o5 DT is within 3 no adjustment is needed See examples Assume DT 15 and A temp 729 these C temperatures would necessitate stated ac tions C F ACTION DT Tprop 539 19 580 14 15 629 10 15 Step 4 Adju
24. ing mode setpoint to 68 F 20 C When pressures have stabilized continue with step 6 Using heating mode When the outdoor ambient temperature is below 60 F 15 C Target subcooling values in table below are based on 65 75 F 18 24 C indoor return air temperature if necessary operate cooling to reach that temperature range then set thermostat to heating mode setpoint to 77 F 25 C When pressures stabilized continue with step 6 Read the liquid line temperature record in the LIQ space Read the liquid line pressure then find its corresponding temperature in the temperature pressure chart listed in table 24 and record it in the SAT space Subtract LIQ temp from SAT temp to determine subcooling record it in SC space 9 Compare SC results with table below being sure to note any additional charge for line set and or match up 10 If subcooling value is greater than shown in unit indoor matchup tables for the applicable unit remove refrigerant if less than shown add refrigerant 11 If refrigerant is added or removed repeat steps 6 through 10 to verify charge Figure 7 Using Subcooling Method Page 13
25. ing to per form any service or maintenance turn the electrical power to unit OFF at dis connect switch es Unit may have multiple power supplies Maintenance and service must be performed by a qualified installer or service agency At the beginning of each cooling season the system should be checked as follows Outdoor Unit 1 Clean and inspect outdoor coil may be flushed with a water hose Ensure power is off before cleaning 2 Outdoor unit fan motor is pre lubricated and sealed No further lubrication is needed 3 Visually inspect all connecting lines joints and coils for evidence of oil leaks 4 Check all wiring for loose connections 5 Check for correct voltage at unit unit operating 6 Check amp draw on outdoor fan motor Unit nameplate Actual 7 Inspect drain holes coil compartment base and clean if necessary NOTE If insufficient heating or cooling occurs the unit should be gauged and refrigerant charge should be checked Indoor Coil 1 Clean coil if necessary 2 Check connecting lines joints and coil for evidence of oil leaks 3 Check condensate line and clean if necessary Indoor Unit 1 Clean or change filters 2 Lennox blower motors are prelubricated and permanent ly sealed No more lubrication is needed 3 Adjust blower speed for cooling Measure the pressure drop over the coil to determine the correct blower CFM Refer to the unit information service manual for pressur
26. ng quench the joints with a wet rag to prevent possible heat damage to any components Page 18 VI WIRING DIAGRAM AND SEQUENCE OF OPERATION OUTDOOR ON OJO BLACK COMPRESSOR CRANKCASE HEATER DEFROST THERMOSTAT LI A 208 230 60 L2 EQUIPMENT GROUND DESCRIPTION BI COMPRESSOR 84 2 CAPACITOR DUAL CMCIICONTROL DEFROST HRI HEATER COMPRESSOR VALVE REVERSING 54 SWITCH HIGH PRESSURE 56 SWITCH DEFROST THERMOSTAT CRANKCASE 1541 THERMOSTAT LOW AMBIEN SWITCH LOW PRESSURE 13HPX UNIT DIAGRAM DUAL P C 8 CAPACITOR Ba m n RED ad y NOTE FOR USE WITH COPPER CONDUCTORS ONLY REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM OVER CURRENT PROTECTION SIZE A 541 TO BE MOUNTED IN CONTROL BOX AND WIRED IN PARALLEL WITH LOW PRESSURE SWITCH Page 19 DEFROST CONTROL THERMOSTAT OPOQ 208 230 60 THERMOSTAT LOGS 541 LOW 587 SWITCH CONNECTION MUST BE JUMPERED WHEN OPTIONAL SWITCH IS NOT USED WARNING ELECTRIC SHOCK HAZARD CAN CAUSE INJURY OR DEATH UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND LOCAL CODES DENOTES OPTIONAL COMPONENTS LINE VOLTAGE FIELD INSTALLED CLASS 11 VOLTAGE FIELD INSTALLED Supersedes Form No New Form No 554 774W Litho U S A 13HPX SEQU
27. per is removed before an addi tional 5 second period has elapsed 7 seconds total the unit will remain in defrost mode until the defrost thermostat opens or 14 minutes have passed If the jumper is not re moved until after the additional 5 second period has elapsed the defrost will terminate and the test option will not function again until the jumper is removed and re ap plied Compressor Delay The defrost board has a field selectable function to reduce occasional sounds that may occur while the unit is cycling in and out of the defrost mode The compressor will be cycled off for 30 seconds going in and out of the defrost mode when the compressor delay jumper is removed NOTE 30 second off cycle is not functional when jumpering the TEST pins Time Delay The timed off delay is five minutes long The delay helps to protect the compressor from short cycling in case the pow er to the unit is interrupted or a pressure switch opens The delay is bypassed by placing the timer select jumper across the TEST pins for 0 5 seconds Pressure Switch Circuit The defrost control incorporates two pressure switch cir cuits The high pressure switch S4 connects to the board s HI PS terminals The board also includes terminals LO PS for a low pressure switch 587 See figure 4 for switch terminal location During a single demand cycle the defrost control will lock out the unit after the fifth time that the circuit is interrupted
28. r 3038 14 318 28 935 1785 98 3082 12 339 29 955 64 1816 99 3127 10 361 30 975 65 1843 100 3172 8 384 31 995 66 1877 101 3218 4 431 33 102 9 68 1941 103 331 2 456 34 105 69 1973 104 3357 482 35 1071 70 2006 105 340 5 1 495 36 1092 71 2039 106 345 3 2 509 37 1114 72 2072 107 350 1 3 522 38 1136 73 2106 108 355 536 39 1158 74 214 109 360 55 40 18 75 2174 110 365 564 41 120 3 76 220 9 111 579 42 1226 77 2244 112 375 1 593 43 125 78 228 113 380 2 9 608 44 1273 79 2316 114 3854 10 623 45 1297 80 2353 115 3907 11 639 46 1322 81 239 116 396 12 654 47 1346 82 2427 117 4013 13 67 48 1371 83 2465 118 4067 14 686 49 1396 84 2503 119 4122 15 702 50 1422 85 2541 120 4177 16 719 51 1448 86 258 121 4232 17 735 52 1474 87 262 122 428 8 18 752 53 1501 88 266 123 4345 19 77 54 1528 89 270 124 440 2 20 787 55 1555 90 2741 125 4459 17 E Oil Charge See compressor nameplate IV MAINTENANCE A WARNING Electric shock hazard Can cause inju ry or death Before attempt
29. rge shown on unit name 1 plate Remember to consider line set length difference CH33 42 10 INDOOR UNIT MATCHUPS 13HPX XXX 230 01 19 through 13HPX XXX 230 03 10 Table 15 13HPX 018 Amount of charge required in additional to charge shown on unit name Target plate Remember to consider line set length difference Subcooling INDOOR MATCHUPS Heat Cool 59 157 CBX26UH 018 11 9 CBX32MV 018 024 230 12 12 CBX32MV 024 030 230 12 19 Table 16 13HPX 024 Target INDOOR MATCHUPS ca eel 5 F 1 CBX26UH 024 20 16 CB30U 31 14 15 CBX32M 030 14 15 CBX32MV 018 024 14 15 CBX32MV 024 030 14 15 NIN j oj Nin ojo Target Subcooling INDOOR MATCHUPS Heat Cool 5 F 1 F 13HPX 036 Continued CR33 30 36 CR33 48 CR33 50 60 CX34 36B CX34 38 SN 6007 and after CX34 38 before SN 6007 CX34 42B CX34 44 48B aj aj a NI OL N Table 19 13HPX 042 Target Subcooling 1 1 1 0 1 CH33 25B 14 15 0 INDOOR MATCHUPS ae eae CH33 36A 14 15 0 5 F 1 Ib oz CH33 36B 14 15 0 CBX26UH 042 26 5 111 CH33 36C 14 15 14 CBX26UH 048 10 12 4 5 CR33 30 36 20 1
30. s forced toward the center of the scroll and the gas pocket becomes compressed figure 8 3 When the compressed gas reaches the center it is discharged vertically into a chamber and discharge port in the top of the compressor figure 7 The discharge pressure forcing down on the top scroll helps seal off the upper and lower edges tips of the scrolls figure 7 During a single orbit several pockets of gas are compressed simultaneously providing smooth continuous compression The scroll compressor is tolerant to the effects of liquid return If liquid enters the scrolls the orbiting scroll is allowed to sepa rate from the stationary scroll The liquid is worked toward the center of the scroll and is discharged If the compressor is re placed conventional Lennox cleanup practices must be used Due to its efficiency the scroll compressor is capable of draw ing a much deeper vacuum than reciprocating compres sors Deep vacuum operation can cause internal fusite arcing resulting in damaged internal parts and will result in compressor failure Never use ascroll compressor for evacuating or pumping down the system This type of damage can be detected and will result in denial of war ranty claims The scroll compressor is quieter than a reciprocating com pressor however the two compressors have much differ ent sound characteristics The sounds made by a scroll compressor do not affect system reliability performance or indicate
31. s simple efficient and requires few moving parts A cutaway diagram of the scroll compressor is shown in figure 5 The scrolls are located in the top of the compressor can and the motor is located just below The oil level is immedi ately below the motor The scroll is a simple compression concept centered around the unique spiral shape of the scroll and its inherent properties Figure 6 shows the basic scroll form Two identical scrolls are mated together forming concentric spiral shapes figure 7 One scroll remains stationary while the other is allowed to or bit figure 8 Note that the orbiting scroll does not rotate or tum but merely orbits the stationary scroll SCROLL COMPRESSOR DISCHARGE FIGURE 5 NOTE During operation the head of a scroll compressor may be hot since it is in constant contact with discharge gas SCROLL FORM FIGURE 6 CROSS SECTION OF SCROLLS DISCHARGE STATIONARY SCROLL DISCHARGE PRESSURE 9 22 SASAANSASSASM 7 7 2222777772 79414444441 77777777 7 SS S SS NA WS ORBITING SCROLL TIPS SEALED BY DISCHARGE PRESSURE FIGURE 7 The counterclockwise orbiting scroll draws gas into the outer crescent shaped gas pocket created by the two scrolls figure 8 1 The centrifugal action of the orbiting scroll seals off the flanks of the scrolls figure 8 2 As the orbiting motion contin ues the gas i
32. ssor should never be used to evacu ate refrigeration or air conditioning system 2 Evacuate the system to 29 inches 737mm vacuum Dur ing the early stages of evacuation it is desirable to stop the vacuum pump at least once to determine if there is a rapid loss of vacuum A rapid loss of vacuum would indi cate a leak in the system and a repeat of the leak testing section would be necessary 3 After system has been evacuated to 29 inches 737mm close gauge manifold valves to center port Page 11 stop vacuum pump and disconnect from gauge man ifold Attach an upright nitrogen drum to center port of gauge manifold and open drum valve slightly to purge line at manifold Break vacuum in system with nitro gen pressure by opening manifold high pressure valve Close manifold high pressure valve to center port 4 Close nitrogen drum valve and disconnect from gauge manifold center port Release nitrogen pres sure from system 5 Connect vacuum pump to gauge manifold center port Evacuate system through manifold service valves until vacuum in system does not rise above 5mm of mercury absolute pressure or 500 microns within a 20 minute period after stopping vacuum pump 6 After evacuation is complete close manifold center port and connect refrigerant drum Pressurize system slightly with refrigerant to break vacuum D Charging This system is charged with HFC 410A refrigerant which operates at much higher press
33. st the fan speed See indoor unit instructions to crease decrease fan speed 15 4 Increase the airflow 1 within 3 range no change 5 Decrease the airflow Changing air flow affects all temperatures recheck temperatures to confirm that the temperature drop and DT are within 3 Figure 4 Checking Indoor Airflow over Evaporator Coil using Delta T DT Chart CHECK EXPANSION VALVE LOW HUGH PRESSURE PRESSURE TO HFC 410 A DRUM DISTRIBUTO R FILTER DRIER OUTDOOR COIL MUFFLE R LIQUID SERVICE LIQUID LINE VALVE COMPRESSO R OUTDOOR UNIT NOTE ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW REVERSING VALVE INDOOR UN VAPOR SERVICE PORT LINE VALVE M 2 CHECK EXPANSION VALVE NOTE USE GAUGE PORTS ON VAPOR LINE VALVE AND LIQUID VALVE FOR EVACUATING REFRIGERANT LINES AND INDOOR COIL USE VAPOR GAUGE PORT TO MEASURE VAPOR PRESSURE DURING INDOOR COIL Figure 5 13HPX Cooling Cycle Showing Gauge Manifold Connections Page 12 WE 5 H l N Check Liquid and suction line pressures Compare unit pressures with Normal LENNOX Operating Pressures tables Refrigerant Charge per Line Set Length pes Teina Conduct leak check evacuate as CONTANS HFG DESIGN PRESSURE previously outlined Ounces per 5 feet g per 1 5 m E Weigh in the unit nameplate charge pl
34. stat 56 remains closed at the end of the 30 60 or 90 minute period defrost relay energizes and defrost begins 9 During defrost CMC1 energizes the reversing valve and on the terminal strip operating indoor unit on the first stage heat mode while de energizing outdoor fan motor B4 10 Defrost continues 14 1 minutes or until thermostat Switch S6 opens When defrost thermostat opens defrost control timer loses power and resets Page 20
35. unit HR1 is con trolled by thermostat S40 located in the liquid line When liquid line temperature drops below 50 F S40 closes ener gizing HR1 S40 will open once liquid line temperature reaches 70 de energizing HR1 TABLE 2 TUBE SHELF KIT CONTENTS PE 10N46 Refrig 2 3 years room tempera ture 3 years re frigerated 10N45 Acid Checkmate RT750A three Test Tubes pack 6 12 months 10N44 Mois ture Test Tubes Checkmate RT751 Tubes three pack room tempera ture 2 years re frigerated 2 3 years room tempera ture 3 years re frigerated d nee Sporian One Shot TA 1 1 74 40 Easy Oil Test Tubes Checkmate RT752C Tubes three pack 13HPX COOLING CYCLE SHOWING MANIFOLD GAUGE CONNECTIONS OUTDOOR UNIT DISTRIBUTOR ZE EXPANSION CHECK VALVI 4 REVERSING VALVE BIFLOW FILTER DRIER OUTDOOR COIL LOW HIGH PRESSURE PRESSURE MUFFLER LIQUID LINE SERVICE INDOOR UNIT X SUCTION SERVICE NOTE ARROWS INDICATE DIRECTION OF REFRIGERANT FLOW FIGURE 10 Page 8 13HPX HEATING CYCLE SHOWING MANIFOLD GAUGE CONNECTIONS OUTDOOR UNIT DEFROST THERMOSTAT EXPANSION CHECK VALVE REVERSING VALVE BIFLOW FILTER DRIER OUTDOOR COIL LOW HIGH PRESSURE PRESSURE MUFFLER pa INDOOR UNIT LIQUID LINE SERVICE PORT S SUCTION SERVICE INDOOR NOTE
36. up indoor air quality and indoor load cause pressures to vary Temperature of the air entering the outside coil Page 16 Table 23 Normal Operating Pressures Liquid 10 4 Vapor 5 PSIG 13HPX XXX 230 01 through 13HPX XXX 230 03 13HPX 018 13HPX 024 13HPX 030 13HPX 036 13HPX 042 13HPX 048 13HPX 060 13HPX 061 oF Liquid Liquid Liquid Liquid Liquid Liquid Vapor Vapor Vapor Vapor Vapor Vapor Cooling Liquid Liquid Vapor Vapor 105 41 421 151 460 150 425 144 452 148 414 146 115 45 492 152 534 152 487 147 512 151 473 148 432 143 492 146 450 138 417 1 144 512 141 472 147 60 15 325 130 353 130 328 127 350 131 360 135 361 130 370 127 386 122 50 10 309 114 330 109 313 110 331 107 340 110 334 100 350 102 342 81 40 4 293 96 307 90 297 93 314 88 324 91 302 92 30 1 278 79 291 75 284 77 290 74 307 73 300 73 20 7 264 65 276 59 271162 283 58 298 61 286 60 331 81 309 62 300 56 332 76 322 73 304 59 These are most popular match up pressures Indoor match up indoor air quality and indoor load cause pressures to vary Temperature of the air entering the outside coil Table 24 HFC 410A Temp F Pressure Psig Psig 40 10 1 21 805 56 1582 91 2782 L35 135 1221 823 Sr 161 92 2823 8 1 207 er sts ez 164 o
37. ures than HCFC 22 The recommended check expansion valve is approved for use with HFC 410A Do not replace it with a valve that is de signed to be used with HCFC 22 This unit is NOT ap proved for use with coils that include metering orifices or capillary tubes The unit is factory charged with the amount of HFC 410A refrigerant indicated on the unit rating plate This charge is based on a matching indoor coil and outdoor coil with a 15 foot 4 6 m line set A blank space is provided on the unit rating plate to list the actual field charge A IMPORTANT Mineral oils are not compatible with HFC 410A If oil must added it must polyol ester oil CHECKING INDOOR AIRFLOW NOTE Be sure that filters and indoor and outdoor coils are clean before testing COOLING MODE INDOOR AIRFLOW CHECK Check airflow using the Delta T DT process figure 4 HEATING MODE INDOOR AIRFLOW CHECK Blower airflow CFM may be calculated by energizing electric heat and measuring e temperature rise between the return air and supply air temperatures at the indoor coil blower unit e measuring voltage supplied to the unit e measuring amperage being drawn by the heat unit s Then apply the measurements to determine CFM Amps x Volts x SETUP FOR CHARGING taken in following formula 3 41 1 08 x Temperature rise F Connect the manifold gauge set to the unit s service ports Temp of air 22 low pressure gau
38. us adjust from 15 feet 4 6 m line set om any charge required for line set differences over feet 3 ounce per 5 85 g per 1 5 m NOTE If line length is greater than 15 ft 4 6 add this amount If line length is less than 15 ft 4 6 m subtract this amount This nameplate 15 for illustration 4 amp 4 purposes only Go to actual nameplate on outdoor unit for charge information Figure 6 Using Weigh In Method 1 Check the airflow as illustrated in figure 4 to be sure the indoor airflow is as S U BCOO LI N G required Make any air flow adjustments before continuing with the following procedure Measure outdoor ambient temperature determine whether to use cooling mode or heating mode to check charge Connect gauge set USE COOLING Check Liquid and Vapor line pressures Compare pressures with Normal MODE Operating Pressures tables The reference table is a general guide Expect minor 60 F 159 pressure variations Significant differences may mean improper charge or other system problem MODE 2 Set thermostat for heat cool demand depending on mode being used Using cooling mode When the outdoor ambient temperature is 60 F 15 C and above Target subcooling values in table below are based 70 to 80 F 21 27 C indoor return air temperature if necessary operate heating to reach that temperature range then set thermostat to cool
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