24
Figure 25. Gas Supply Line
Step 7
Gas Pressure
Requirements
Pressure requirements for these gas fireplaces are shown in
the table below.
Pressure
Natural Gas
Propane
Minimum
7.0 inches
12.0 inches
Inlet Pressure
w.c.
w.c.
Maximum Inlet
14.0 inches
14.0 inches
Gas Pressure
w.c.
w.c.
Manifold
3.5 inches
10.0 inches
Pressure
w.c.
w.c.
A one-eighth (1/8) inch (3 mm) N.P.T. plugged tapping is
provided on the outlet side of the gas control for a test
gauge connection to measure the manifold pressure. To
measure inlet pressure, provisions must be made to attach a
test gauge to a one-eighth (1/8) inch (3 mm) N.P.T. plugged
tapping immediately upstream of the gas supply connection
to the fireplace.
The fireplace and its individual shut-off valve must be
disconnected from the gas supply piping system during any
pressure testing of the system at test pressures in excess of
one-half (1/2) psig (3.5 kPa).
The fireplace must be isolated from the gas supply piping
system by closing its individual shut-off valve during any
pressure testing of the gas supply piping system at test
pressures equal to or less than one-half (1/2) psig (3.5 kPa).
USE A WRENCH ON
SHUT-OFF VALVE
WHEN TIGHTENING
GAS LINE.
At the gas line access hole, use insulation to re-pack the
space around the gas pipe.
Insert insulation from the outside of the fireplace and
pack the insulation tightly to totally seal between the pipe
and the outer casing.
The gas line should be
installed by a qualified
service technician.