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GAS SUPPLY
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, a 1/8-in (3.175mm)
N.P.T. plugged tapping, accessible for test gauge connection, must
be placed immediately upstream of the gas supply connection
to the appliance.
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).
Attention!
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.
Checking Manifold Pressure
Millivolt
Natural gas models will have a manifold pressure of ap-
proximately 4.0-in w.c. (.871kPa) at the pressure regulator outlet
with the inlet pressure to the pressure regulator from a minimum
of 5.0-in w.c. (1.120kPa) for the purpose of input adjustment to a
maximum of 10.5-in w.c. (2.615kPa).
Manual
Natural gas models will
have a manifold pressure of approximately 4.5-in w.c. (1.12kPa) at
the pressure regulator outlet with the inlet pressure to the pressure
regulator from a minimum of 5.0-in w.c. (1.74kPa) for the purpose of
input adjustment to a maximum of 10.5-in w.c. (2.615kPa).
Millivolt
and Manual
Propane gas models will have a manifold pressure ap-
proximately 10.0-in w.c. (2.49kPa) at the pressure regulator outlet
with the inlet pressure to the pressure regulator from a minimum
of 11.0-in w.c. (2.739kPa) for the purpose of input adjustment to a
maximum of 13.0-in w.c. (3.237kPa).
Manual
NOTICE
:
A test gage connection is located downstream of the gas
appliance pressure regulator for measuring gas pressure. The con
-
nection is a 1/8 inch 3mm) N.P.T. plugged tapping.
Millivolt
NOTICE
:
The gas control is equipped with a captured screw type
pressure test point, therefore it is not necessary to provide a 1/8-in
test point up stream of the control.
