Gas Supply Pressure Measurement; Gas Manifold Pressure Measurement And Adjustment - Goodman GKS9 Installation Instructions Manual

2. Remove the burner compartment door and move the furnace
gas valve manual control to the OFF position.
3. Close the manual gas shutoff valve external to the furnace.
4. Replace the burner compartment door.
G S P M
AS UPPLY RESSURE
T
O PREVENT UNRELIABLE OPERATION
INLET GAS SUPPLY PRESSURE MUST
RATING PLATE WITH ALL OTHER
.
OPERATING
HIGH VOLTAGE !
D
ISCONNECT ALL POWER BEFORE
. M
INSTALLING THIS UNIT ULTIPLE
. F
BE PRESENT AILURE TO DO SO
,
DAMAGE PERSONAL INJURY OR
The line pressure supplied to the gas valve must be within the
range specified below. The supply pressure can be measured at
the gas valve inlet pressure tap or at a hose fitting installed in the
gas piping drip leg. The supply pressure must be measured with
the unit OFF. To measure inlet pressure, use the following proce-
dure.
Gas Valve
On/Off
Selector
Switch
OUTLET
Pressure Regulator
Adjustment
(Under Cap Screw)
White-Rodgers Model 36G22
Inlet
Pressure
Tap
Gas Valve On/Off
Selector Switch
Honeywell Model VR8215 (Single-Stage)
EASUREMENT
CAUTION
OR EQUIPMENT DAMAGE
BE AS SPECIFIED ON THE UNIT
HOUSEHOLD GAS FIRED APPLIANCES
WARNING
SERVICING OR
POWER SOURCES MAY
MAY CAUSE PROPERTY
.
DEATH
Inlet Pressure
Tap
INLET
Outlet Pressure
Tap
Pressure Regulator
(under cap screw)
Outlet
Pressure
Tap
1. Turn OFF gas to furnace at the manual gas shutoff valve
external to the furnace.
2. Turn OFF all electrical power to the system.
3. Inlet pressure tap connections:
a. Honeywell VR8215 Valve:
Remove the inlet pressure boss plug. Install an 1/8" NPT
hose barb fitting into the outlet pressure tap.
b. White-Rodgers 36G22 valve:
Back inlet pressure test screw (inlet pressure boss) out
,
THE
one turn (counterclockwise, not more than one turn).
4. Attach a hose and manometer to the outlet pressure barb
fitting (Honeywell valve) or inlet pressure boss (White-
Rodgers valve).
5. Turn ON the gas supply.
6. Turn On power and close thermostat "R" and "W" contacts
to provide a call for heat.
7. Using a leak detection solution or soap suds, check for
leaks at outlet pressure boss plug (Honeywell valve) or
screw (White-Rodgers valve). Bubbles forming indicate a
leak. SHUT OFF GAS AND REPAIR ALL LEAKS
IMMEDIATELY!
8. Measure the gas supply pressure with burners firing. Adjust
supply pressure using the Inlet Gas Supply Pressure table
shown below. If supply pressure reading differs from the
table, make necessary adjustments to pressure regulator,
gas piping size, etc., and/or consult with local gas utility.
Natural Gas
Propane Gas
9. Turn OFF all electrical power and gas supply to the system.
10. Remove the manometer hose from the hose barb fitting or
inlet pressure boss.
11. Replace inlet pressure tap:
a. Honeywell VR8215 valve:
Remove the 1/8" NPT hose barb fitting from the inlet
pressure tap. Replace the inlet pressure boss plug and
seal with a high quality thread sealer.
b. White-Rodgers 36G22 valve:
Turn inlet pressure test screw in to seal pressure port
(clockwise, 7 in-lb minimum).
12. Retest for leaks. If bubbles form, shut down gas and repair
leaks immediately.
13. Turn ON electrical power and gas supply to the system.
14. Turn valve switch ON.
G M
AS ANIFOLD
T
O PREVENT UNRELIABLE
GAS MANIFOLD
. O
PLATE NLY MINOR
THE GAS VALVE
30
Inlet Gas Supply Pressure
Minimum: 4.5" W.C. Maximum: 10.0" W.C.
Minimum: 11.0" W.C. Maximum: 13.0" W.C.
P M
RESSURE EASUREMENT AND
CAUTION
OPERATION OR EQUIPMENT
PRESSURE MUST BE AS SPECIFIED
ADJUSTMENTS SHOULD BE
.
PRESSURE REGULATOR
A
DJUSTMENT
,
DAMAGE THE
ON THE UNIT RATING
MADE BY ADJUSTING