Heat & Glo Fireplace ST-38GTV - Manual (Page 13)

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Figure 9. Gas Supply 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.
Step 7. The Gas Supply Line
NOTE: Have the gas supply line installed in accordance
with local building codes by a qualified installer
approved and/or licensed as required by the locality.
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USE A WRENCH ON
SHUT-OFF VALVE WHEN
TIGHTENING GAS LINE
GAS VALVE
FLEX
CONNECTOR
MANUAL
SHUT-OFF VALVE
WARNING: THIS UNIT IS NOT FOR USE WITH
SOLID FUEL.
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Step 6. The Gas Controls System
WARNING: DO NOT USE AN OPEN FLAME
TO CHECK FOR GAS LEAKS.
GAS
ACCESS
Two types of gas control systems are used with these models:
Standing Pilot Ignition and Direct Spark Ignition (DSI).
Standing Pilot Ignition System
This system includes millivolt control valve, standing pilot,
thermopile/thermocouple flame sensor, and piezo ignitor.
WARNING: 110-120 VAC MUST NEVER BE
CONNECTED TO A CONTROL VALVE IN A
MILLIVOLT SYSTEM.
Direct Spark Ignition (DSI) System
This system includes a 24V control valve, electronic module,
transformer, and spark ignitor/flame sensor.
WARNING: 110-120 VAC MUST BE WIRED TO
THE FIREPLACE JUNCTION BOX IN A DSI
SYSTEM.
NOTE: Before the first firing of the fireplace, the gas
supply line should be purged of any trapped air.
NOTE: Consult local building codes to properly size
the gas supply line leading to the 1/2 inch (13mm) hook-
up at the unit.
This gas fireplace is designed to accept a 1/2 inch (13mm)
gas supply line.
To install the gas supply line:
• A listed (and State of Massachusetts approved) 1/2 inch
(13mm) tee-handle manual shut-off valve and a listed flex-
ible gas connector are connected to the 1/2 inch (13mm)
inlet of the control valve. NOTE: If substituting for these
components, please consult local codes for compliance.
• Locate the gas line access hole in the outer casing of
the fireplace.
• The gap between the supply piping and gas access hole
can be plugged with non-combustible insulation to pre-
vent cold air infiltration.
• Insert the gas supply line through the gas line hole, and
connect it to the shut-off valve.
• When attaching the pipe, support the control so that the
lines are not bent or torn.
• After the gas line installation is complete, use a soap
solution to carefully check all gas connections for leaks.
Figure 8. Gas Supply Line
3/8” (10mm)
STANDING PILOT
DSI IGNITION
3/16” (5mm)
CERAMIC
INSULATOR
IGNITOR
1/2” (13mm)