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Page 26

Gas Heat Start-Up (Gas Units) 

FOR YOUR SAFETY READ BEFORE LIGHTING

 

WARNING

Electric shock hazard. Can cause injury
or death. Do not use this unit if any part
has been under water. Immediately call
a qualified service technician to inspect
the unit and to replace any part of the
control system and any gas control
which has been under water.

 

WARNING

Danger of explosion. Can cause injury
or product or property damage. If over­
heating occurs or if gas supply fails to
shut off, shut off the manual gas valve
to the appliance before shutting off
electrical supply.

 

WARNING

Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.

WARNING

SMOKE POTENTIAL

The heat exchanger in this unit could be a source of
smoke on initial firing. Take precautions with re­
spect to building occupants and property. Vent ini­
tial supply air outside when possible.

BEFORE LIGHTING smell all around the appliance area

for gas. Be sure to smell next to the floor because some

gas is heavier than air and will settle on the floor.

Use only your hand to push in or turn 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 explosion.

 

WARNING

Danger of explosion. Can cause injury or
death. Do not attempt to light manually.
Unit has a direct spark ignition system.

This unit is equipped with an automatic spark ignition

system. There is no pilot. In case of a safety shutdown,

move thermostat switch to 

OFF

 and return the thermostat

switch to 

HEAT

 to reset ignition control.

A-Placing Unit In Operation

 

WARNING

Danger of explosion and fire. Can cause
injury or product or property damage.
You must follow these instructions
exactly.

Gas Valve Operation for Honeywell
VR8205Q/VR8305Q and White Rodgers 36H54 (figure
18 and 19)

1- Set thermostat to lowest setting.

2- Turn off all electrical power to appliance.

3- This appliance is equipped with an ignition device

which automatically lights the burner. Do 

not

 try to

light the burner by hand.

4- Open or remove the heat section access panel.

WHITE RODGERS 36H54 GAS VALVE

Two-Stage

FIGURE 18

LOW FIRE

ADJUSTMENT

HIGH FIRE

ADJUSTMENT

INLET

PRESSURE

TAP

MANIFOLD

PRESSURE

TAP

GAS VALVE SWITCH SHOWN IN

 ON

 POSITION.

HONEYWELL VR8205Q/VR8305Q SERIES GAS VALVE

GAS VALVE KNOB IS SHOWN IN 

OFF

 POSITION.

FIGURE 19

LOW FIRE

ADJUSTMENT

HIGH FIRE

ADJUSTMENT

INLET

PRESSURE

TAP

MANIFOLD

PRESSURE

TAP

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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