Lennox KCA092 Installation Instructions Manual Download Page 20

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Page 20

TABLE 5

102S Normal Operating Pressures

Outdoor Coil Entering Air Temperature

105

115

Suct

(psig)

Disc

(psig)

Suct

(psig)

Disc

(psig)

Suct

(psig)

Disc

(psig)

Suct

(psig)

Disc

(psig)

Suct

(psig)

Disc

(psig)

Suct

(psig)

Disc

(psig)

Circuit 1

111

252

114

289

117

332

119

378

122

428

125

483

118

256

122

295

125

337

128

383

131

434

133

489

132

269

136

307

141

350

145

396

149

447

151

502

148

285

152

322

157

367

161

413

166

465

170

518

Circuit 2

111

249

114

288

117

331

119

377

121

428

124

482

118

254

122

295

125

336

128

383

129

433

130

483

132

271

136

308

141

350

145

397

148

447

147

500

149

291

152

325

157

371

162

417

166

468

168

520

100

110

120

130

110

120

130

140

150

160

170

Liquid Temperature (

Suction Pressure (psig)

Outdoor Temperature (°F)

115°

105°

95°

85°

75°

65°

Charging Curves

Circuit 1
Circuit 2

Summary of Contents for KCA092

Page 1: ...Rigging Unit For Lifting Page 5 Condensate Drains Page 6 Connect Gas Piping Page 7 Pressure Test Gas Piping Page 8 INSTALLATION INSTRUCTIONS KGA KCA092 KGA KCA102 KGA KCA120 KGA KCA150 7 5 Ton 8 5 To...

Page 2: ...NING 24 610 5 5 8 143 6 1 8 6 1 8 156 6 5 8 168 28 711 27 686 20 508 BOTTOM CONDENSATE 101 1 4 2572 BOTTOM SUPPLY AIR OPENING 34 7 8 886 BASE 7 178 7 178 BOTTOM POWER ENTRY 5 1 2 140 Dia SIDE VIEW LIF...

Page 3: ...BURNERS COMBUSTION AIR INDUCER DISCONNECT CIRCUIT BREAKER FACTORY OR FIELD INSTALLED OPTION BLOWER INVERTER OPTIONAL KCA092 102 120 150 PARTS ARRANGEMENT EVAPORATOR COIL CONDENSER FANS CONDENSER COIL...

Page 4: ...efore performing any maintenance or servicing operations on the unit Follow lighting instructions attached to unit when putting unit back into operation and after service or maintenance NOTICE Roof Da...

Page 5: ...ep in mind when using the building frame or supports are 1 The base is fully enclosed and insulated so an enclosed frame is not required 2 The frames or supports must be constructed with non combustib...

Page 6: ...r grade however a tee should be fitted to the trap to direct condensate downward The condensate line must be vented Check local codes concerning condensate disposal Refer to pages 2 and 3 for condensa...

Page 7: ...densate drain hole 11 Use a field provided 1 plug to seal side drain connection 12 Replace the condensate drain mullion and reinstall eight screws 13 Reinstall access doors FIGURE 7 BOTTOM CONDENSATE...

Page 8: ...OMMET 4 NIPPLE 10 NIPPLE 7 NIPPLE ALTERNATE KNOCKOUTS Pressure Test Gas Piping Gas Units When pressure testing gas lines the gas valve must be disconnected and isolated Gas valves can be damaged if su...

Page 9: ...2 in control box for gas units or units equipped with electric heat Route power to F4 on cooling only units no electric heat Route power to S48 disconnect switch when the option is factory installed S...

Page 10: ...tion pressure must drop discharge pressure must rise and blower rotation must match rotation marking 3 Disconnect all remote electrical power supplies 4 Reverse any two field installed wires connected...

Page 11: ...rements must be made with a dry indoor coil Run blower without a cooling demand Measure the indoor blower shaft RPM Air filters must be in place when measurements are taken 2 With all access panels in...

Page 12: ...e mounting base to the frame FIGURE 15 PULLEY ALIGNMENT BELT BLOWER PULLEY MOTOR PULLEY NOT ALIGNED ALIGNED F Check Belt Tension Overtensioning belts shortens belt and bearing life Check belt tension...

Page 13: ...9 1179 2 15 1230 2 40 2000 615 0 07 657 0 05 702 0 10 748 0 36 797 0 72 846 1 05 892 1 30 933 1 45 977 1 55 1049 1 75 1124 2 00 1181 2 23 1234 2 47 2250 624 0 09 664 0 07 707 0 14 753 0 50 800 0 84 84...

Page 14: ...1124 1 82 1166 1 95 2000 493 0 29 561 0 47 629 0 64 700 0 77 768 0 9 832 1 02 892 1 17 946 1 33 995 1 49 1041 1 66 1085 1 81 1126 1 97 1167 2 12 2250 507 0 37 574 0 56 643 0 72 712 0 86 779 0 99 842 1...

Page 15: ...2 09 1197 2 42 2500 615 0 19 655 0 15 699 0 20 747 0 55 797 0 89 851 1 20 906 1 44 959 1 58 1009 1 68 1059 1 83 1108 2 01 1158 2 26 1206 2 52 2750 626 0 23 666 0 19 709 0 37 755 0 71 805 1 03 858 1 32...

Page 16: ...92 1057 2 10 1105 2 29 1154 2 47 1206 2 68 3000 564 0 66 626 0 84 692 1 01 759 1 16 819 1 32 874 1 49 924 1 68 971 1 88 1017 2 08 1063 2 26 1110 2 44 1158 2 63 1208 2 83 3250 585 0 79 648 0 98 714 1 1...

Page 17: ...0 24 0 22 0 16 0 37 0 47 0 22 0 32 0 06 0 11 5500 0 25 0 23 0 18 0 44 0 54 0 25 0 34 0 07 0 12 5750 0 27 0 25 0 19 0 49 0 59 0 31 0 45 0 07 0 12 6000 0 29 0 27 0 20 0 54 0 64 0 33 0 52 0 08 0 13 Page...

Page 18: ...mizer An increased cooling demand Y2 will energize compressor 1 and both condenser fans When outdoor air is not acceptable unit will operate as though no economizer is installed 3 Units contain two re...

Page 19: ...emperature when adjusting charge Note that suction pressure can change as charge is adjusted 7 Example KG KC 092S Circuit 1 At 95 F outdoor ambient and a measured suction pressure of 130psig the targe...

Page 20: ...95 125 337 128 383 131 434 133 489 132 269 136 307 141 350 145 396 149 447 151 502 148 285 152 322 157 367 161 413 166 465 170 518 Circuit 2 111 249 114 288 117 331 119 377 121 428 124 482 118 254 122...

Page 21: ...3 352 125 398 128 454 132 516 130 290 135 328 139 369 143 420 147 474 150 537 148 319 151 354 155 398 160 440 166 508 170 567 Circuit 2 108 258 109 298 107 340 117 394 120 447 123 506 116 265 119 305...

Page 22: ...3 344 125 391 128 441 131 495 131 276 135 315 139 358 142 405 145 457 148 514 148 293 152 332 156 375 160 424 164 476 168 533 Circuit 2 109 249 112 287 115 328 118 375 120 425 123 481 115 255 119 294...

Page 23: ...3 319 125 369 127 426 130 497 136 240 139 278 142 320 145 369 147 422 150 483 157 248 159 284 163 325 166 373 168 424 171 482 Circuit 2 112 232 115 269 117 313 118 371 120 441 122 523 119 237 122 273...

Page 24: ...124 317 126 365 128 417 130 476 139 241 142 279 144 321 147 367 148 420 151 476 156 251 160 287 164 328 168 374 171 424 175 480 Circuit 2 113 233 116 273 118 317 120 371 122 439 125 530 122 233 124 27...

Page 25: ...0 130 100 110 120 130 140 150 160 170 180 Liquid Temperature F 120H Charging Curves Circuit 1 Circuit 2 Outdoor Temperature F C Compressor Controls See unit wiring diagram to determine which controls...

Page 26: ...n the gas control knob Never use tools If the knob will not push in or turn by hand do not try to repair it call a qualified service technician Force or attempted repair may result in a fire or explos...

Page 27: ...inducer starts immediately 2 Combustion air pressure switch proves inducer operation After a 30 second pre purge power is allowed to ignition control Switch is factory set and requires no adjustment 3...

Page 28: ...on the VFD control board to HI 3 Rotate the high speed potentiometer on the VFD control board to set the high speed minimum damper position 4 Measure the intake air CFM If the CFM is lower than the d...

Page 29: ...easure the voltage between the end terminals on the H2 header If 24VDC is present replace the LVC2 board If no voltage is read troubleshoot the VFD 8 When LVC2 24VAC thermostat blower G input and 24VD...

Page 30: ...t for use in Canada B Lubrication All motors are lubricated at the factory No further lubrication is required FIGURE 22 REMOVE FILTERS PULL TO REMOVE FILTERS C Burners Gas Units Periodically examine b...

Page 31: ...ck flame D Combustion Air Inducer Gas Units A combustion air proving switch checks combustion air inducer operation before allowing power to the gas controller Gas controller will not operate if induc...

Page 32: ...described in section D 2 Remove flue box cover Clean with a wire brush as required 3 Clean tubes with a wire brush 4 Reassemble the unit The flue box cover gasket and combustion air inducer gasket sh...

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