Goodman Amana AMH8 Service Instructions Manual page 59

SERVICING
c. Turn ON the gas supply. Set dip switch #2 set to
"two stage"& dip switch #3 set to "5 minutes"
d. Turn on power and close thermostat "R" and "W"
contacts to provide a call for heat. The burners
will light in high fire and go to low fire after sev-
eral seconds.
e. Measure the gas manifold pressure with burners
firing. Adjust manifold pressure using the Mani-
fold Gas Pressure table shown below.
f. Remove regulator cover screw from the low (LO)
outlet pressure regulator adjust tower and turn
screw clockwise to increase pressure or counter-
clockwise to decrease pressure. Replace regula-
tor cover screw. Open thermostat circuit to end
the call for heat. Once the indoor blower turns
off, turn off power to furnace.
g. To check & set high fire, set switch#2 to single
stage. Turn on furnace power, close thermostat
"R" and "W" contacts to provide a call for heat.
h. Remove regulator cover screw from the high (HI)
outlet pressure regulator adjust tower and turn
screw clockwise to increase pressure or counter-
clockwise to decrease pressure. Replace regula-
tor cover screw.
i. Turn off all electrical power and gas supply to the
system.
j. Remove the manometer hose from the hose barb
fitting or outlet pressure boss.
k. Turn outlet pressure test screw in to seal pres-
sure port (clockwise, 7 in-lb minimum).
Measuring Manifold Gas Pressure
(36G54 Valve)
High Fire Regulator
Adjust Regulator
Vent
Regulator
Vent
Gas Valve On/Off
Selector Switch
Honeywell Model VR9205 (Two-Stage)
Measuring Gas Pressure: Two-Stage
Valves Cont'd
i
Outlet Pressure Tap
1/8 NPT
Honeywell Model VR9205 Connected to Manometer
4. Remove regulator cover screw from the low (LO)
outlet pressure regulator adjust tower and turn
screw clockwise to increase pressure or counter-
clockwise to decrease pressure. Replace regulator
cover screw.
a. Close thermostat "R" and "W" contacts to pro-
vide a call for heat.
b. Remove regulator cover screw from the high (HI)
outlet pressure regulator adjust tower and turn
screw clockwise to increase pressure or counter-
clockwise to decrease pressure. Replace regula-
tor cover screw.
c. Turn off all electrical power and gas supply to
the system.
d. Remove the manometer hose from the outlet pres-
sure boss.
High Fire
Regulator
Adjust
Low Fire
Regulator
Adjust
Common
Terminal(C)
High Fire Coil
Terminal (HI)
Low Fire Coil
Terminal (LO)
Inlet Pressure Tap
1/8 NPT
59