Step 5 The Gas Control Systems; Step 6 The Gas Supply Line; Step 7 Gas Pressure Requirements - Quadra-Fire QV-ST Installer's Manual

Step 5. The Gas Control System
WARNING: THIS UNIT IS NOT FOR USE WITH
!
SOLID FUEL.
The gas control system used with this model is Standing
Pilot Ignition.
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 CON-
!
NECTED TO A CONTROL VALVE IN A MILLIVOLT
SYSTEM.
STANDING PILOT
Figure 29. Gas Control System
Step 6. 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.
(In the state of Massachusetts installation must be
performed by a licensed plumber or gas fitter).
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
(13 mm) hook-up at the unit.
This gas fireplace is designed to accept a 1/2 inch
(13 mm) 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
flexible 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 gas line may be run from either side of the fireplace
provided the hole in the outer wrap does not exceed 2" in
diameter and it does not penetrate the actual firebox.
• Open the fireplace lower grille, 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.
3/8" (10mm)
28
• After the gas line installation is complete, use a soap
solution to carefully check all gas connections for leaks.
WARNING: DO NOT USE AN OPEN FLAME
!
TO CHECK FOR GAS LEAKS.
• Insert insulation from the outside of the fireplace and
pack the insulation tightly to totally seal between the
pipe and the outer casing.
• At the gas line access hole the gap between the supply
piping and gas access hole can be plugged with non-
combustible insulation to prevent cold air infiltration.
GAS LINE
CONTROL VALVE
ACCESS
Figure 30. Gas Supply Line
Step 7. Gas Pressure Requirements
Pressure requirements for Hearth & Home Technolo-
gies gas fireplaces are shown in the table below.
Pressure Natural Gas
Minimum 5.0 inches
Inlet Pressure
Maximum Inlet 14.0 inches
Gas Pressure
Manifold 3.5 inches
Pressure
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).
USE A WRENCH ON
SHUT-OFF VALVE
WHEN TIGHTENING
GAS LINE.
MANUAL
SHUT-OFF
VALVE
FLEX CONNECTOR
GAS VALVE
Propane
11.0 inches
w.c. w.c.
14.0 inches
w.c. w.c.
10.0 inches
w.c. w.c.