Vanguard Heating VMH26TPB - Manual (Page 16)

111043-01A
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16
ON
POSITION
OFF
POSITION
Pressure Testing Gas Supply Piping System
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1. Disconnect appliance with its appliance main gas valve (control
valve) and equipment shutoff valve from gas supply piping. Pres-
sures in excess of 1/2 psig will damage fireplace regulator.
2. Cap off open end of gas pipe where equipment shutoff valve
was connected.
3. Pressurize supply piping system by either opening propane/LP sup-
ply tank valve for propane/LP gas or opening main gas valve lo-
cated on or near gas meter for natural gas, or using compressed air.
4. Check all joints of gas supply piping system. Apply a noncor-
rosive leak detection fluid to gas joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve to gas supply.
Check reconnected fittings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 27).
2. Pressurize supply piping system by either opening propane/
LP supply tank valve for propane/LP gas or opening main gas
valve located on or near gas meter for natural gas, or using
compressed air.
3. Check all joints from gas meter for natural or propane/LP sup-
ply to equipment shutoff valve (see Figures 28 and 29). Apply
a noncorrosive leak detection fluid to gas joints. Bubbles form-
ing show a leak.
4. Correct all leaks at once.
Pressure Testing Fireplace Gas Connections
1. Open equipment shutoff valve (see Figure 27).
2. Open main gas valve located on or near gas meter for natural
gas or open propane/LP supply tank valve.
Open
Closed
Equipment Shutoff
Valve
Figure 28 - Checking Gas Joints for Propane/LP Gas (Shown
with Optional Mantel)
Figure 27 - Equipment Shutoff Valve
Equipment Shutoff Valve
Propane/LP
Supply Tank
WARNING: Test all gas piping and connections
for leaks after installing or servicing. Correct all leaks
at once.
WARNING: Never use an open flame to check for
a leak. Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak. Correct all
leaks at once.
CAUTION: Make sure external regulator has been
installed between propane/LP supply and fireplace. See
guidelines under
Connecting to Gas Supply, page 14.
3. Make sure control knob of fireplace is in the OFF position.
4. Check all joints from equipment shutoff valve to thermostat
gas valve. Apply a noncorrosive leak detection fluid to gas
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light fireplace (see Operating Fireplace, pages 17 and 18).
Check all other internal joints for leaks.
7. Turn off fireplace (see To Turn Off Gas to Appliance, page 18).
8. Replace front panel.
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
Figure 29 - Checking Gas Joints for Natural Gas (Shown with
Optional Mantel)
Equipment Shutoff Valve
Gas Meter
INSTALLATION
Checking Gas Connections