14. Repeat the adjustment procedure for the second 6. | Turn on gas supply at the manual valve, turn on |
gas valve on the 500,000 Btu/hr model. | L.P. gas at tank if required. |
15. Turn the gas valve control knob(s) to “ON” 7. Turn the power “ON” at the main disconnect
position. | switch. |
|
|
16. Turn the power “ON” at the main disconnect 8. | Turn gas valve control knob | to | “PILOT” |
switch. The appliance is now ready to operate. | position on standing pilot models. | Follow the | |
| “Lighting Instructions” for standing pilot models | ||
If manifold pressure can not be properly adjusted, use | to light the pilot. Turn gas valve control knob to | ||
| |||
the following procedure to check gas supply pressure | the “ON” position when the pilot is established. | ||
| |||
with a manometer connected to the inlet pressure tap on | Turn gas valve control knob(s) | to | the “ON” |
| |||
the gas control. | position on spark ignition models. |
|
CHECKING GAS SUPPLY PRESSURE
| Gas Supply Pressure |
| Manometer |
8 |
|
7 |
|
6 |
|
5 |
|
4 |
|
3 |
|
2 |
|
1 |
|
0 |
|
1 |
|
2 |
|
3 | Gas Valve |
| |
4 |
|
5 |
|
6 |
|
7 |
|
8 |
|
9.Set the thermostat(s) to call for heat.
10.Observe the gas supply pressure with all burners firing. Ensure inlet pressure is within specified range. Check gas supply pressure with all other gas fired appliances in operation to ensure proper gas volume during periods of peak gas usage.
11.If gas pressure is out of range, contact gas utility, gas supplier, qualified installer or service agency to determine necessary steps to provide proper gas pressure to the control.
12.If the gas supply pressure is within the specified range, proceed with the following steps to return the appliance to service.
13.Turn the power “OFF” at the main disconnect switch.
FIG. 19 Gas Supply Pressure
1.Turn the power “OFF” at the main disconnect switch.
2.Turn gas valve control knob(s) to the “OFF” position.
3.The 500,000 Btu/hr model will have two gas valves. Turn the gas valve control knob on each valve to the “OFF” position.
4.Shut off gas supply at the manual valve in the gas piping to the appliance. If fuel supply is L.P. gas, shut off gas supply at the tank.
5.Remove the 1/8" hex plug, located on the “inlet” side of the gas valve and install a fitting suitable to connect to a manometer or magnahelic gauge. On two gas valve models, remove the hex plug from the gas valve closest to the gas supply connection. Range of scale should be 14" w.c. or greater to check inlet pressure. See Figures 18 and 19 for location.
14.Turn gas valve control knob to “PILOT” position on standing pilot models. Turn gas valve control knob(s) to “OFF” position on spark ignition models.
15.Shut off gas supply at the manual valve in the gas piping to the appliance. If fuel supply is L.P. Gas, shut off gas supply at the tank.
16.Remove the manometer and related fittings from the “inlet” side of the gas valve, replace 1/8" hex plug in gas valve.
17.Turn on gas supply at the manual valve, turn on L.P. Gas at tank if required.
18.Turn the power “ON” at the main disconnect switch.
19.Turn the gas valve control knob(s) to the “ON” position. If the pilot is not burning, follow the “Lighting Instructions” for standing pilot models to light the pilot. Spark ignition models will automat- ically light the pilot on a call for heat.
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