Goodman [A/G]PG, Service Instructions Manual

Page: 47 / 52

SERVICING
47
S-303 TESTING INDUCER MOTOR
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, 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 pro-
vides all manual and automatic control functions required for
gas fired heating equipment is used.
The valve provides control of main burner gas flow, pressure
regulation, and 100 percent safety shut-off.
1. Ensure gas valve and main gas supply are on.
2. Using a voltmeter, check for 24 volts to gas valve.
3. If 24 volts are present and no gas flows through the valve,
replace valve.
If no voltage is present, check the safety controls (S-300, S-
301 and S-302).
Pressure Regulator
Adjustment
(Under Cap Screw)
Gas Valve
On/Off
Selector
Switch
INLET
OUTLET
Inlet Pressure
Tap
Outlet Pressure
Tap
OUTLET
INLET
Pressure Regulator
Adjustment
(Under Cap Screw)
Gas Valve
On/Off
Selector
Switch
Inlet Pressure Tap
(Side of Valve)
Outlet (Manifold)
Pressure Tap
WHITE ROGERS MODELS 36F & 36G GAS VALVES
S-305 CHECKING MAIN BURNERS
The main burners are used to provide complete combustion of
natural gas or liquid propane in a limited space, and transfer
this heat of the combustion process to the heat exchanger.
Proper ignition, combustion, and extinction are primarily due
to burner design, orifice sizing, gas pressure, primary and sec-
ondary air, vent and proper seating of burners.
BECKETT BURNER