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Amana AMH8 Operations Instructions Page 58

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58
SERVICING
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High Fire Regulator
Adjust
Regulator
Vent
Measuring Manifold Gas Pressure
(36G54 Valve)
Gas Valve On/Off
Selector Switch
Regulator
Vent
High Fire
Regulator
Adjust
Low Fire
Regulator
Adjust
Honeywell Model VR9205 (Two-Stage)
Measuring Gas Pressure: Two-Stage Valves
Cont'd
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Common
Terminal(C)
High Fire Coil
Terminal (HI)
Low Fire Coil
Terminal (LO)
Inlet Pressure Tap
1/8 NPT
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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 counterclockwise to
decrease pressure. Replace regulator cover screw.
a. Close thermostat “R” and “W” contacts to provide 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 counterclockwise
to decrease pressure. Replace regulator 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.
e. 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.
WARNING
HIGH VOLTAGE
D
ISCONNECT ALL ELECTRICAL POWER AND SHUT OFF GAS SUPPLY
BEFORE SERVICING OR INSTALLING.
5. Turn on gas to furnace and check for leaks. If leaks
are found, repair and then reinstall burner compart-
ment door.
6. Turn on electrical power and verify proper unit opera-
tion. Make sure furnace operates at the proper mani-
fold pressure at both high and low stage outputs.
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