Testing Inducer Motor; Testing Gas Valve - Goodman APG 13 Service Instructions Manual

SERVICING
S-303 TESTING INDUCER MOTOR
HIGH VOLTAGE!
Disconnect ALL power before servicing
or installing this unit. Multiple power
sources may be present. Failure to do so
may cause property damage, personal injury
or death.
1. Disconnect the motor wire leads from its connection point
at integrated ignition control module.
2. Using and ohmmeter, test for continuity between each of
the motor leads.
3. Touch one probe of the ohmmeter to the motor frame
(ground) and the other probe in turn to each lead.
If the windings do not test continuous or a reading is obtained
to ground, replace the motor.
4. After completing check and/or replacement of induced
draft blower motor.
5. Turn on electrical power and verify proper unit operation.
S-304 TESTING GAS VALVE
Direct Spark Ignition (DSI) Systems
A combination redundant operator type gas valve which
provides all manual and automatic control functions required
for gas fired heating equipment is used on 13 SEER models.
A two-stage combination redundant operator type gas valve
which provides all manual and automatic control functions
required for gas fired heating equipment is used on 15 SEER
models.
The valve provides control of main burner gas flow, pressure
regulation, and 100 percent safety shut-off.
HIGH VOLTAGE!
Disconnect ALL power before servicing
or installing this unit. Multiple power
sources may be present. Failure to do so
may cause property damage, personal injury
or death.
1. Ensure gas valve and main gas supply are on.
2. Using a voltmeter, check from the purple and blue wires
on 1 stage gas valves and from C and M on 2 stage gas
valves for 24 volts to gas valve.
3. If 24 volts are present and no gas flows through the valve,
replace valve.
54
Gas Valve
On/Off
Switch
Outlet
Outlet Pressure
Tap
W/R 36G54-238
WHITE ROGERS MODEL 36G 2-STAGE GAS VALVE
W/R 36G22-202
WHITE ROGERS MODEL 36G 1-STAGE GAS VALVE
Inlet
Pressure
Tap
Gas Valve On/Off
Selector Switch
HONEYWELL MODEL VR8215 1-STAGE GAS VALVE
Inlet Pressure
Tap
Inlet
Pressure Regulator
(under cap screw)
Outlet
Pressure
Tap