K-Series (7.5-12.5 KGA) Installation Instructions - Allied Commercial

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6− If discharge pressure is high, remove refrigerant fromthe system. If discharge pressure is low, addrefrigerant to the system. Add or remove charge in increments. Allow the system to stabilize each timerefrigerant is added or removed.7− Use the following approach method along with thenormal operating pressures to confirm readings.TABLE 4KGA/KCA092S NORMAL OPERATING PRESSURESOutdoorCoilEnteringAir TempDischarge+10 psigCIRCUIT 1 CIRCUIT 2DischargeSuction+5 psig +10 psigSuction+5 psig65 F 260 130 269 13275 F 301 133 311 13385 F 343 135 354 13695 F 388 138 401 139105 F 435 140 449 141115 F 481 142 497 144TABLE 5KCA/KGA102S NORMAL OPERATING PRESSURESOutdoorCoilEnteringAir TempDischarge+10 psigCIRCUIT 1 CIRCUIT 2DischargeSuction+5 psig +10 psigSuction+5 psig65 F 262 128 270 12975 F 299 131 310 13185 F 342 134 353 13495 F 386 137 399 136105 F 434 140 448 139115 F 487 143 501 142TABLE 6KCA/KGA120S NORMAL OPERATING PRESSURESOutdoorCoilEnteringAir TempDischarge+10 psigCIRCUIT 1 CIRCUIT 2DischargeSuction+5 psig +10 psigSuction+5 psig65 F 275 135 282 13675 F 313 137 323 13885 F 355 140 366 14195 F 400 142 414 143105 F 447 145 464 145115 F 499 148 517 148TABLE 7KCA/KGA150S NORMAL OPERATING PRESSURESOutdoorCoilEnteringAir TempDischarge+10 psigCIRCUIT 1 CIRCUIT 2DischargeSuction+5 psig +10 psigSuction+5 psig65 F 279 132 283 13675 F 318 134 323 13885 F 360 136 364 13995 F 406 138 411 140105 F 456 141 462 142115 F 508 145 515 145Page 18D−Charge Verification − Approach Method−AHRI Testing1− Using the same thermometer, compare liquidtemperature (at condenser outlet) to outdoor ambienttemperature.Approach Temperature = Liquid temperature minusambient temperature.2− Approach temperature should match values shown intable 8. An approach temperature greater than thisvalue indicates an undercharge. An approachtemperature less than this value indicates anovercharge.TABLE 8APPROACH TEMPERATURELiquid Temp. Minus Ambient Temp.Unit1st Stage2nd Stage092 9°F + 1 (5.0°C + 0.5) 8°F + 1 (4.4°C + 0.5)102 7°F + 1 (3.9°C + 0.5) 6°F + 1 (3.3°C + 0.5)120 8°F + 1 (4.4°C + 0.5) 6°F + 1 (3.3°C + 0.5)150 6°F + 1 (3.3°C + 0.5) 6°F + 1 (3.3°C + 0.5)3− The approach method is not valid for grossly over orundercharged systems. Use tables 4 through 7 as aguide for typical operating pressures.C−Compressor ControlsSee unit wiring diagram to determine which controls areused on each unit. Optional controls are identified onwiring diagrams by arrows at junction points.1− Freezestats (S49, S50)Switches de−energize compressors when evaporatorcoil temperature falls below 29°F (−2°C) to preventevaporator freeze−up. Switches reset whenevaporator coil temperature reaches 58°F (15°C).Gas Heat Start−Up (Gas Units)FOR YOUR SAFETY READ BEFORE LIGHTINGWARNINGElectric shock hazard. Can cause injuryor death. Do not use this unit if any parthas been under water. Immediately calla qualified service technician to inspectthe unit and to replace any part of thecontrol system and any gas controlwhich has been under water.WARNINGDanger of explosion. Can cause injuryor product or property damage. If overheatingoccurs or if gas supply fails toshut off, shut off the manual gas valveto the appliance before shutting offelectrical supply.
WARNINGElectric shock hazard. Can causeinjury or death. Before attempting toperform any service or maintenance,turn the electrical power to unit OFF atdisconnect switch(es). Unit may havemultiple power supplies.WARNINGSMOKE POTENTIALThe heat exchanger in this unit could be a source ofsmoke on initial firing. Take precautions with respectto building occupants and property. Vent initialsupply air outside when possible.BEFORE LIGHTING smell all around the appliance areafor gas. Be sure to smell next to the floor because somegas 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 byhand, do not try to repair it, call a qualified servicetechnician. Force or attempted repair may result in a fireor explosion.WARNINGDanger of explosion. Can cause injury ordeath. Do not attempt to light manually.Unit has a direct spark ignition system.This unit is equipped with an automatic spark ignitionsystem. There is no pilot. In case of a safety shutdown,move thermostat switch to OFF and return the thermostatswitch to HEAT to reset ignition control.A−Placing Unit In OperationWARNINGDanger of explosion and fire. Can causeinjury or product or property damage.You must follow these instructionsexactly.Gas Valve Operation for HoneywellVR8205Q/VR8305Q (figure 18)HONEYWELL VR8205Q/VR8305Q SERIES GAS VALVEHIGH FIREADJUSTMENTINLETPRESSURETAPLOW FIREADJUSTMENTGas valve knob is shown in OFF position.MANIFOLDPRESSURETAPFIGURE 185− Turn the knob on the gas valve clockwise toOFF". Do not force.6− Turn the knob on the gas valve counterclockwiseto ON". Do not force.7− Close or replace the heat section access panel.8− Turn on all electrical power to appliance.9− Set thermostat to desired setting.10− The ignition sequence will start.11− If the appliance does not light the first time (gas linenot fully purged), it will attempt up to two moreignitions before locking out.12− If lockout occurs, repeat steps 1 through 10.13− If the appliance will not operate, follow theinstructions Turning Off Gas to Appliance" and callyour service technician or gas supplier.Turning Off Gas to Unit1− If using an electromechanical thermostat, set to thelowest setting.2− Before performing any service, turn off all electricalpower to the appliance.3− Open or remove the heat section access panel.4− Turn the knob on the gas valve clockwise toOFF". Do not force.5− Close or replace the heat section access panel.WARNINGDanger of explosion. Can cause injury ordeath. Do not attempt to light manually.Unit has a direct spark ignition system.1− Set thermostat to lowest setting.2− Turn off all electrical power to appliance.Heating Operation and Adjustments3− This appliance is equipped with an ignition device (Gas Units)which automatically lights the burner. Do not try to A−Heating Sequence of Operationlight the burner by hand.1− On a heating demand the combustion air inducer4− Open or remove the heat section access panel.starts immediately.Page 19
Page 2: KGA/KCA092, 102, 120, & 150 DIMENSI
Page 6 and 7: 4− Place field-provided H-style p
Page 8 and 9: OUTSIDE OF UNIT GAS PIPE CONNECTION
Page 10 and 11: 24 VOLT FIELD WIRING WITH ELECTRONI
Page 12 and 13: LOCATION OF STATIC PRESSURE READING
Page 14 and 15: BLOWER DATA120 BELT DRIVE BLOWER
Page 16 and 17: BLOWER DATAFACTORY INSTALLED BELT D
Page 20 and 21: 2− Combustion air pressure switch
Page 22 and 23: ServiceThe unit should be inspected
Page 24: Clean combustion air inducer as fol

K-Series (7.5-12.5 KGA) Installation Instructions - Allied Commercial

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