Lennox HPXA19 Unit Information Download Page 26 | Manualshive

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HPXA19−038 with Variable Speed Motor

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Summary of Contents for HPXA19

Page 1: ...of this R410A unit are higher than pressures in R22 units Always use service equipment rated for R410A WARNING Improper installation adjustment alteration service or maintenance can cause property da...

Page 2: ...99 0 99 Outdoor Coil F M t Full load amps 0 8 0 8 2 8 1 7 1 7 Fan Motor Locked rotor amps 2 2 Not Applicable 3 1 3 1 OPTIONAL ACCESSORIES MUST BE ORDERED EXTRA Compressor Hard Start Kit Factory Instal...

Page 3: ...ORBITING SCROLL DISCHARGE SUCTION CROSS SECTION OF SCROLLS TIPS SEALED BY DISCHARGE PRESSURE DISCHARGE PRESSURE The counterclockwise orbiting scroll draws gas into the out er crescent shaped gas pocke...

Page 4: ...ing for second stage Second stage high capacity is achieved by blocking the bypass ports figure 5 bypass ports closed with a slider ring The slider ring begins in the open position and is con trolled...

Page 5: ...ch Procedure 1 Turn main power OFF to outdoor unit 2 Adjust room thermostat set point above heating op eration on heat pump or below cooling operation the room temperature 5 F 3 Remove control access...

Page 6: ...ctifier plug Listen for a click as the solenoid is energized See figure 6 compressor solenoid fusite terminals compressor fusite terminals meter rectifier plug leads apply 24vac FIGURE 6 3 Unplug the...

Page 7: ...is normally closed and is permanently adjusted to trip open at 640 10 psi and close at 448 10 psi See fig ure 13 for switch location E Capacitor C12 The compressor in XP19 024 036 048 and 060 units us...

Page 8: ...et to close at 40 2 F on a temperature drop and reset at 50 2 F on a temperature rise TABLE 2 Control Setpoints Low Ambient Thermostat Adjustable Range Factory Setting Min Max Cut In Close on Temperat...

Page 9: ...s controlled by the compressor con tactor See ELECTRICAL DATA and SPECIFICATIONS section for more information See figure 11 if condenser fan motor replacement is necessary Rain shield location is crit...

Page 10: ...er to maintain constant airflow cfm Motor rpm is continually adjusted internally to maintain constant static pressure against the fan blade The control ler monitors the static work load on the motor a...

Page 11: ...rb 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 introdu...

Page 12: ...s in all units are equipped with a 70 watt belly band type crankcase heater HR1 prevents liquid from ac cumulating in the compressor HR1 is controlled by the crankcaseheater thermostat X Crankcase hea...

Page 13: ...sure switch is present check Flash Code 2 information 4 If low pressure switch is present check Flash Code 1 information Yellow Alert Flash Code 4 Locked Rotor 1 Run capacitor has failed 2 Low line vo...

Page 14: ...e off the compressor and the strike counter in the board will count one strike S87 is ignored during certain conditions During the defrost cycle and 90 seconds after the termination of defrost When th...

Page 15: ...nitiated after 34 minutes of heating mode compressor run time The control will attempt to self calibrate after this and all other defrost cycle s Calibration success depends on stable system temperatu...

Page 16: ...connection of gauge manifold during charging procedure Figure 22 shows HPXA19 refrigerant flow and gauge manifold connections TABLE 7 M d l Valve Field Size Connections Recommended Line Set Model Liq...

Page 17: ...nnect gauge to the service port 3 When testing is complete replace service port cap Tighten finger tight then an additional 1 6 turn To Open Service Valve 1 Remove stem cap with an adjustable wrench 2...

Page 18: ...that can re sult in personal injury or death Using an Electronic Leak Detector 1 Connect a cylinder of R410A to the center port of the manifold gauge set 2 With both manifold valves closed open the v...

Page 19: ...losing the manifold gauge valves 9 When the absolute pressure requirement above has been met disconnect the manifold hose from the vacu um pump and connect it to an upright cylinder of R410A refrigera...

Page 20: ...r best results indoor temperature should be 70 F 21 C to 80 F 26 C Monitor system pressures while charging 1 Record outdoor ambient temperature using a digital thermometer 2 Attach high pressure gauge...

Page 21: ...244 136 231 133 232 134 249 126 75 23 9 256 145 282 139 263 139 266 136 289 134 85 29 4 302 145 325 142 305 142 309 139 330 140 95 35 0 349 147 377 144 354 145 359 142 378 143 105 40 6 403 149 428 14...

Page 22: ...506 5 43 125 0 74 214 0 105 340 5 136 512 9 44 127 3 75 217 4 106 345 3 137 519 3 45 129 7 76 220 9 107 350 1 138 525 8 46 132 2 77 224 4 108 355 0 139 532 4 47 134 6 78 228 0 109 360 0 140 539 0 48...

Page 23: ...POE oil VI MAINTENANCE WARNING Electric shock hazard Can cause inju ry or death Before attempting to per form any service or maintenance turn the electrical power to unit OFF at dis connect switch es...

Page 24: ...Page 24 VII DIAGRAM OPERATING SEQUENCE HPXA19 024 036 048 060...

Page 25: ...nergized The slider ring re mains open limiting compressor to low capacity B Ambient temperature BELOW S23 low ambient thermostat setting S23 closes shunting Y1 and Y2 1 Internal wiring de energizes t...

Page 26: ...Page 26 1 2 3 4 HPXA19 038 with Variable Speed Motor...

Page 27: ...pen limiting compressor to low capacity B Ambient temperature BELOW S23 low ambient setting S23 closes shunting Y1 and Y2 1 Internal wiring de energizes terminal O by heating mode selection de energiz...

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