Desa VMH26TNC - Manual (Page 18)

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Figure 25 - Attaching Flexible Gas Line
to Equipment Shutoff Valve
Flexible Gas Line
from Fireplace Gas
Regulator Provided
with Fireplace
To Fireplace
Gas Regulator
Equipment Shutoff
Valve Provided by
Installer
PROPANE/LP
To External Regulator
NATURAL
To Gas Supply
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip-
ing and connections, internal
and external to unit, for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak de-
tection fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure external
regulator has been installed be-
tween propane/LP supply and fire-
place. See guidelines under
Con-
necting to Gas Supply, page 16.
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 fire-
place regulator.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3. Pressurize supply piping system by either
opening propane/LP supply 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 noncorrosive 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 26).
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 supply to equipment shutoff valve
(see Figures 27 and 28, page 19). Apply a non-
corrosive leak detection fluid to gas joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Pressure Testing Fireplace Gas
Connections
1.
Open equipment shutoff valve (see Figure 26).
2. Open main gas valve located on or near gas
meter for natural gas or open propane/LP sup-
ply tank valve.
3. Make sure control knob of fireplace is in the
OFF position.
4. Check all joints from equipment shutoff valve
to thermostat gas valve (see Figures 27 and 28,
page 19). 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 19 and 21). Check all other internal
joints for leaks.
7. Turn off fireplace (see To Turn Off Gas to
Appliance, page 20).
8. Replace front panel.
Figure 26 - Equipment Shutoff Valve
O
POSIT
PO
Open
Closed
Equipment
Shutoff
Valve