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GAS SUPPLY (CONT'D)
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, use the test gauge
connection described below.
2. The appliance and its individual shutoff valve must be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
1/2 psig (3.5 kPa).
3. The appliance must be isolated from the gas supply piping system
by closing its individual manual shutoff valve during any pressure
testing of the gas supply piping system at test pressures equal
to or less than 1/2 psig (3.5 kPa).
CAUTION
If one of the procedures results in pressures in excess of 1/2
psig (14-in w.c.) (3.5 kPa) on the appliance gas valve, it will
result in a hazardous condition.
Millivolt Manifold Pressures
Both Natural and Propane
Millivolt
Gas valves have built-in pressure
regulators. Natural Gas models will have a manifold pressure of
approximately 4.5" w.c. at the outlet (5.0" min., 14.0" max., at inlet).
Propane Gas models will have a manifold pressure of approximately
10.0" w.c. at the outlet (10.8" min., 14.0" max., at inlet).
Manual Manifold Pressures
Manual
Natural Gas models have external 5.3" w.c. pressure
regulators (6.0" min., 10.5" max., at regulator inlet).
Manual
*NOTICE
:
A test gage connection is located downstream of the
gas appliance pressure regulator for measuring gas pressure. The
connection is a 1/8 inch 3mm) N.P.T. plugged tapping.
Millivolt
*NOTICE
:
The gas control is equipped with a captured screw-type
test gauge connection.
