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supply pressure and adjust to ensure a supply pressure between 4.0 and 10.5 inches water column natural gas (13.0" w.c. for propane) while the appliance is firing at 100% of rated input.
7.This is a reference pressure only and is not field adjustable. An appliance supplied with a minimum of 4 inches water column of gas supply pressure will operate at the correct manifold pressure as the burner input varies with temperature demand.
8.Close the two gas pressure test cocks on the pressure test tree and remove the hoses to the manometer.
9.Close the front control panel.
IMPORTANT
Upon completion of any testing on the gas system, leak test all gas connections with a soap solution while the main burner is firing. Immediately repair any leak found in the gas train or related components. DO NOT operate an appliance with a leak in the gas train, valves or related gas piping.
WATER CONNECTIONS
AIR INLET
GAS
WATER OUTLET
WATER INLET
FLUE OUTLET
FIG. 37 Water Connections
3.5" W.C.= Pgas |
MANIFOLD GAS PRESSURE |
– – – – = FIELD CONNECTED |
FIG. 36 Manifold Gas Pressure Measurement
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