Heat & Glo Fireplace ST-42TVFL-IPI - Manual (Page 18)

• 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.
Figure 9. Gas Supply Line
Step 8
Gas Pressure
Requirements
Pressure requirements for Heat & Glo gas fireplaces
are shown in the table below.
Pressure Natural Gas Propane
Minimum 5.0 inches 11.0 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 inlet and outlet side of the
gas control for a test gauge connection to measure
the manifold pressure.
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).
FLEX
CONNECTOR
GAS VALVE
MANUAL
SHUT-OFF
VALVE
USE A WRENCH ON
SHUT-OFF VALVE
WHEN TIGHTENING
GAS LINE
GAS LINE
ACCESS
Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
18