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16
100750
ON
POSITION
OFF
POSITION
Figure 14 - Manual Shutoff Valve
Manual
Shutoff
Valve
Open
Closed
Figure 15 - Checking Gas Joints
Manual
Shutoff
Valve
Gas Meter
Control Valve Location
4. Check all joints of gas supply piping system. Apply mixture of liquid soap and
water to gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
Test Pressures Equal To or Less Than 1/2 PSIG
1. Close manual shutoff valve (see Figure 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
mixture of liquid soap and water to gas joints. Bubbles forming show a leak.
4. Correct all leaks at once.
PRESSURE TESTING HEATER GAS CONNECTIONS
1. Open manual shutoff valve (see Figure 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 control valve (see Figure 15).
Apply 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 17 through 24). Check the rest of the
internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 20 [models VN1800IT
and VN2550IT] or page 24 [models VN1800C and VN3000C]).
8. Replace front panel.
CHECKING
GAS
CONNECTIONS
Continued