14
CHECKING GAS CONNECTIONS
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 leaks. Apply a mixture of liquid soap and water to all
joints. Bubbles forming indicate a leak. Correct all leaks immediately.
Figure 14- Equipment Shutoff Valve
Figure 15-A Checking Gas Joints for NG
Figure 15-B Checking Gas joints For LP
Pressure Testing Gas Supply Piping System
Test Pressure in Excess Of 1/2 PSIQ (3.5 K Pa)
1. Disconnect appliance with its appliance main gas valve (control valve)
and equipment shutoff valve from gas supply piping system. Pressure
in excess of 1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where equipment shutoff valve was con
-
nected.
3. Pressurize supply piping system by either using compressed air or
opening main gas valve located on or near gas tank.
4. Check all joints of gas supply piping system. Apply a mixture of liquid
soap and water to gas joints. Bubbles forming indicate a leak.
5. Correct all leaks immediately.
6. Reconnect heater and equipment shutoff valve to gas supply. Check
reconnected fittings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIQ
1. Close equipment shutoff valve (see Figure 14).
2. Pressurize supply piping system by either using com pressed air or
opening main gas valve located on or near gas supply tank.
3. Check all joints from gas tank to equipment shutoff valve (see Figure
15). Apply mixture of liquid soap and water to gas joints. Bubbles
forming show a leak.
4. Correct all leaks immediately.
Pressure Testing Heater Gas Connections
1. Open equipment shutoff valve (see Figure 14).
2. Open main gas valve located on or near gas tank.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from equipment shutoff valve to control valve (see
Figure 15). Apply mixture of liquid soap and water to gas joints. Bubbles
forming show a leak.
5. Correct all leaks immediately.
6 Light heater (see
Operation,
pages 16). Check the rest of the internal
joints for leaks.
7. Turn off heater (see “To Turn Off Gas to Appliance”, page 16).
Fuel
Supply
Fuel
Supply
Equipment
Shutoff Valve
Open
Closed
Control Valve Location
External
Regulator
Equipment Shutoff Valve
Vent Pointing
Down
Control Valve Location
External
Regulator
Equipment Shutoff Valve
Vent Pointing
Down
