Gas Manifold Pressure Measurement And Adjustment; Gas Input Rate Check-Natural Gas Only - Whirlpool WGGE43 Installation Instructions Manual

8. Measure the gas supply pressure with burners firing. Adjust
supply pressure using the Inlet Gas Supply Pressure chart. If
supply pressure reading differs from the chart, make
necessary adjustments to pressure regulator, gas piping size,
etc., and/or consult with local gas utility.
Inlet Gas Supply Pressure
Natural Gas Minimum: 5.0" W.C. Maximum: 10.0" W.C.
Propane Gas Minimum: 11.0" W.C. Maximum: 13.0" W.C.
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:
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.
White-Rodgers 36G22 valve: Turn inlet pressure test
screw in to seal pressure port (clockwise, 7 in.-lb
minimum).
12. Retest for leaks.
IMPORTANT: If a leak is detected, turn off gas immediately
and repair all leaks.
13. Turn on electrical power and gas supply to the system.
14. Turn on valve switch.
Gas Manifold Pressure Measurement and
Adjustment
CAUTION
To prevent unreliable operation or equipment damage, Goodman 65
the gas manifold pressure must be as specified on the
unit rating plate. Only minor adjustments should be made
by adjusting the gas control valve pressure regulator.
WARNING
HIGH VOLTAGE!
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death.
1. Turn off the gas supply to furnace at the manual gas shutoff
valve external to the furnace.
2. Turn off all electrical power to the system.
3. Outlet pressure tap connections:
Honeywell VR8215 valve: Remove the outlet pressure
boss plug. Install an ¹⁄₈" NPT hose barb fitting into the
outlet pressure tap.
White-Rodgers 36G22 valve: Back outlet pressure test
screw (inlet/outlet pressure boss) out one turn
(counterclockwise, not more than one turn).
4. Attach a hose and manometer to the outlet pressure barb
fitting (Honeywell valve) or outlet pressure boss
(White-Rodgers valve).
5. Turn on the gas supply.
6. Turn on power and close thermostat R and W1 contacts to
provide a call for heat.
7. Using a leak detection solution or soap suds, check for leaks
at the outlet pressure boss plug (Honeywell valve) or screw
(White-Rodgers valve). Bubbles forming indicate a leak.
IMPORTANT: If a leak is detected, turn off gas immediately
and repair all leaks.
8. Measure the gas manifold pressure with burners firing.
9. Adjust manifold pressure using the Manifold Gas Pressure
chart.
Manifold Gas Pressure
Natural Gas
Propane Gas
10. Remove the regulator cover screw from the outlet pressure
regulator adjust tower.
11. Turn the screw clockwise to increase pressure or
counterclockwise to decrease pressure.
12. Replace the regulator cover screw.
13. Turn off all electrical power and gas supply to the system.
14. Remove the manometer hose from the hose barb fitting or
outlet pressure boss.
15. Replace the outlet pressure tap:
Honeywell VR8215 valve: Remove the ¹⁄₈" NPT hose barb
fitting from the outlet pressure tap. Replace the outlet
pressure boss plug and seal with a high quality thread
sealer.
White-Rodgers 36G22 valve: Turn the outlet pressure test
screw in to seal pressure port (clockwise, 7 in.-lb
minimum).
16. Turn on electrical power and gas supply to the system.
17. Close the thermostat contacts to provide a call for heat.
18. Using a leak detection solution or soap suds, check for leaks
at the outlet pressure boss plug (Honeywell valve) or screw
(White-Rodgers valve). Bubbles forming indicate a leak.
IMPORTANT: If a leak is detected, turn off gas immediately
and repair all leaks.
Gas Input Rate Check—Natural Gas Only
To measure Natural gas input, use a gas meter and proceed as
follows:
1. Turn off the gas supply to all other gas-burning appliances
except the furnace.
2. While the unit is operating, time and record one complete
revolution of the smallest gas meter dial.
3. Calculate the number of seconds per cubic foot (sec/ft
gas being delivered to the furnace. If the dial is a one cubic
foot dial, divide the number of seconds recorded in Step 2 by
one. If the dial is a 2 cubic foot dial, divide the number of
seconds recorded in Step 2 by 2.
4. With the unit operating, time the smallest dial on the meter for
one complete revolution. If this is a 2 cubic foot dial, divide
the seconds by 2; if it is a 1 cubic foot dial, use the seconds
as is. This gives the seconds per cubic foot of gas being
delivered to the unit.
5. INPUT = GAS HTG VALUE x 3,600 / SEC. PER CUBIC FOOT
Example: Natural gas with a heating value of 1,000 Btu per
cubic foot and 34 seconds per cubic foot as determined by
Step 2, then:
Input = 1,000 x 3,600 / 34 = 106,000 Btu per Hour.
3.5" W.C.
10.0" W.C.
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