S-308 Checking Hot Surface Ignitor - Amana GMS8 Service Instructions Manual

SERVICING
b. Attach a hose and manometer to the outlet pressure
outlet pressure boss.
c. Turn ON the gas supply.
d. Turn on power and close thermostat "R" and "W1"
contacts to provide a call for low stage heat.
e. Measure the gas manifold pressure with burners fir-
ing. Adjust manifold pressure using the Manifold Gas
Pressure table shown below.
f. Remove regulator cover screw from the outlet pres-
sure regulator adjust tower and turn screw clockwise
to increase pressure or counterclockwise to decrease
pressure. Replace regulator cover screw.
i. Turn off all electrical power and gas supply to the
system.
j. Remove the manometer hose from the hose barb fit-
ting or outlet pressure boss.
k. Turn outlet pressure test screw in to seal pressure
port (clockwise, 7 in-lb minimum).
6. Honeywell VR8215 Valve
a. Remove the outlet pressure boss plug. Install an 1/
8" NPT hose barb fitting into the outlet pressure tap.
b. Attach a hose and manometer to the outlet pressure
barb fitting.
c. Turn ON the gas supply.
d. Turn on power and close thermostat "R" and "W1"
contacts to provide a call for low stage heat.
e. Measure the gas manifold pressure with burners fir-
ing. Adjust manifold pressure using the Manifold Gas
Pressure table shown below.
f. Remove regulator cover screw from the outlet pres-
sure regulator adjust tower and turn screw clockwise
to increase pressure or counterclockwise to decrease
pressure. Replace regulator cover screw.
i. Turn off all electrical power and gas supply to the
system.
j. Remove the manometer hose from the hose barb fit-
ting or outlet pressure boss.
k. Remove the 1/8" NPT hose barb fitting from the out-
let pressure tap. Replace the outlet pressure boss
plug and seal with a high quality thread sealer.
HIGH VOLTAGE
D ALL
ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS
SUPPLY BEFORE SERVICING OR INSTALLING THIS UNIT.
M
ULTIPLE POWER SOURCES MAY BE PRESENT.
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
7. Turn on gas to furnace and check for leaks. If leaks are
found, repair and then reinstall burner compartment
door.
8. Turn on electrical power and verify proper unit opera-
tion.
WARNING
F
AILURE TO
Gas Valve
On/Off
Selector
Switch
OUTLET
Pressure Regulator
Adjustment
(Under Cap Screw)
White-Rodgers Model 36J22 (Single-Stage)
Inlet
Pressure
Tap
Gas Valve On/Off
Selector Switch
Honeywell Model VR8215
HIGH VOLTAGE
D ALL
ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY
BEFORE SERVICING OR INSTALLING.
Manifold Gas Pressure
Gas Rate
High Stage 9.7 to 10.3" w.c. 10.0" w.c.
Propane Gas
Low Stage

S-308 CHECKING HOT SURFACE IGNITOR

120V Mini Igniter Single Stage - furnaces use a 120V
carbide mini igniter for ignition. (part# 20165703) or a
Silicon Nitride igniter (part# 0130F00008) The normal
operating temperature is approximately 2550°F - 2876°F.
WARNING
D ALL
ISCONNECT POWER BEFORE SERVICING.
Inlet Pressure
Tap
INLET
Outlet Pressure
Tap
Pressure Regulator
(under cap screw)
Outlet
Pressure
Tap
WARNING
Range Nominal
5.7 to 6.3" w.c. 6.0" w.c.
63