Lennox International Inc G32Q5-125 Normal Cooling Mode Abnormal Cooling Mode, GPRRoOuPNEDRELYI

Page 31

COOLINGSEQUENCEOFOPERATION

NORMAL COOLING MODE

ABNORMAL COOLING MODE

 

I

POWER ON

I

 

I

IGNITION CONTROL MAIN POWER ON.

I

IISCONTROLSELFOPERATINGDIAGNOSTICNORMALLY?CHECK. YES _1

GAS VALVE OFF. COMBUSTION AIR BLOWER OFF, INDOOR SLOWER OFF WITH NORMAL DELAY.

SIGNAL CIRCUIT BOARD FAILURE AT LED.

INTERRUPT MAIN POWER TO RESET CONTROL.

/

J

I

TURN INDUCER ON FOR 1 SECOND.

I

 

 

I

IS POLARITY REVERSED?

 

 

SIGNAL POLARITY REVERSED AT LED.

SIGNAL HOLDS"

N_

PRo/SE THERoE ._I YEs-J

IS VOLTAGE

_

LOW VOLTAGE SIGNAL AT LET HOLDS

 

 

 

UNTIL UNIT IS

I-_=-I

ERR

UND._

ABOVE 75 VOLTS?

I_1

UNT L VOLTAGE R SES ABOVE 75 VOLTS.

GPRRoOuPNEDRELY"I

 

 

 

GAS VALVE OFE COMBUSTION AIR INDUCER OFR

 

 

 

 

 

 

 

 

 

 

 

INDOOR BLOWER OFF WITH NORMAL DELAY

I ROLLOUTISSWITCHROLLOUTMONITOREDSWITCHCLOSED?CONTINUOUSLY,

 

SIGNAL CIRCUIT BOARD FAILURE ATLED,

 

 

 

 

SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES.

I CHECK FOR MAIN BURNER FLAME SENSE. IS MAIN BURNER FLAME OFF?

T

I LED: SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT COOLING CYCLE.

I THERMOSTAT CALLS FOR COOLING.

ICOMPRESSOR CONTACTOR AND SYSTEM FAN ENERGIZED WITH O-SECOND DELAY, ACB COOL

SPEED ENERGIZED. ACC. TERM. ENERGIZED.

N_I1

'-I

I

I

I

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF WITH NORMAL DELAY. SIGNAL CIRCUIT BOARD FAILURE AT LED.

SEQUENCE HOLDS UNTIL FLAME IS NOT SENSED,

I

1

I

THERMOSTAT OPENS.

I

COMPRESSOR OFF.

I

SYSTEM FAN AND ACC. TERM. OFF

I

WITH O-SECOND DELAY,

I

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Contents Lennox AIR Outlet TOP ViewDoor Interlock Switch AssemblyAccess Panel AIR AccessInches mrn Shipping Damage Insta!iatton Setttng EquipmentKnockout Pattern for Bottom Return AIR Application Bottom Return Filter InstallationSide Return Filter Installation in.turn Bottom Return Air ApplicationsPiping and Fittings Specifications Filter Door AssemblySupply Air Plenum BTU Termination KitsG32-100 or -125 with 3 IN. Venting OUTIventingractl es Pipe Resized to approach the minimum size as deterTopview WallringkitWall Ringtermination OutsidewallWall Termination Exhaust Termination IntakeExhaarus Front View ExhaustFront View ,, l/EXHAUST Vent Side ViewUse the provided condensate drain adapter 3/4 Nipplebootorcap AdapterFor Right-Hand Side Condensate Exit Right Side Piping Condensate PlumbingGroundjoint type Left Side PipingGAS Pipe Capacity ft.3/hr Im31hrl Connections factory- and field-installed for gas leaksPrecautions and Procedures Electrostatic Discharge ESDG32Q and Condensing Unit Interior MAKE-UP BOX InstallationExterior MAKE-UP BOX Installation Hole in the cabinet. a snaphole plug is providedtoSurelight Integrated Control Board G32Q Control BOXG32Q TWO-STAGE Control Board Typical G32Q Field Wiring DiagramTypical G32Q Schematic Wiring Diagram GAS Valve Shown in OFF Position For Your Safety Read Before OperatingHoneywell VR8205 Series GAS Valve Turn gas valve knob to on positionOperation sequence followssteps 1 through4 as out KBtuhDIFFERENTIALPRESSURESWITCHCIRCUITRY Manifold Pressure Measurement & AdjustmentAnnual Service Temperature RiseBlower Speeds Bushing.Reconnect wires Cleaning DuralokPlus TM Heat Exchanger275F 135C Reinstallthe screws to secure the burner box cover Cleaning the Bumer AssemblySimultaneous CabinetBlower Parts Heating PartsOperation Normal Heating ModeAbnormal Heating Mode Heating SequenceGAS Valve OFF. Combustion AIR Normal Heating Mode AbnormalIndoor Blower on Delay Begins Flame SignalCombustion AIR Inducer on for 2.5 Minutes High Heat GAS Valve OPEN? 8 SEC. DelayPressure Switch Watchguard Combustion AIR Inducer IprepurgeGPRRoOuPNEDRELYI Normal Cooling Mode Abnormal Cooling ModeTH Ermostat InstallerJob Number Heating Section
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