12
103449
UNVENTED NATURAL GAS LOG HEATER
DESA INTERNATIONAL
ON
POSIT
O
POS
Open
Closed
Manual
Shutoff
Valve
Figure 15 - Checking Gas Joints
Test Pressures Equal To or Less Than
1/2 PSIG
1.
Close manual shutoff valve (see Fig-
ure 14).
2.
Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
3.
Check all joints from gas meter to manual
shutoff valve (see Figure 15). Apply mix-
ture of liquid soap and water to gas joints.
Bubbles forming show a leak.
4.
Correct all leaks at once.
Figure 14 - Manual Shutoff Valve
INSTALLATION
Continued
CHECKING GAS
CONNECTIONS
WARNING: Test all gas pip-
ing and connections 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
mixture of liquid soap and water
to all joints. Bubbles forming show
a leak. Correct all leaks at once.
Pressure Testing gas Supply
Piping system
Test Pressures In Excess Of 1/2 PSIG
1.
Disconnect heater and its individual
manual shutoff valve from gas supply
piping system. Pressures in excess of
1/2 psig will damage heater regulator.
2.
Cap off open end of gas pipe where
manual shutoff valve was connected.
3.
Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
4.
Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5.
Correct all leaks at once.
6.
Reconnect heater and manual shutoff
valve to gas supply. Check reconnected
fittings for leaks.
Pressure Testing Heater Gas
Connections
1.
Open manual shutoff valve (see Fig-
ure 14).
2.
Open main gas valve located on or near
gas meter.
3.
Make sure control knob of heater is in
the OFF position.
4.
Check all joints from manual shutoff
valve to gas control (see Figure 15). Ap-
ply mixture of liquid soap and water to
gas joints. Bubbles forming show a leak.
5.
Correct all leaks at once.
6.
Light heater (see Operating Heater,
pages 14 through 16). Check all other
internal joints for leaks.
7.
Turn off heater (see To Turn Off Gas to
Appliance, page 15).
Gas Meter
Manual Shutoff Valve
Gas Control Location
