!
INSTALLING
FURNACE
(Continued)
CHECKING GAS CONNEC_ONS
AWARNING
Test all gas piping and connections for leaks after Installation or
servicing. Correct aU 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.
1
Pressure Testing Gas Supply Piping System
Test Pressures In Excess Of 1/2 PSIG
1. Disconnect furnace and its individual manual shutoff valve from gas supply
piping system.
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 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 16).
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. Apply mixture of liquid
soap and water to gas joints. Bubbles forming show a leak.
4. Correct all leaks at once.
Pressure Testing Furnace Gas Connections
1. Open manual shutuff valve (see Figure 16).
2. Open main gas valve located on or near gas meter.
3. Make sure control knob of furnace is in the OFF position.
4. Check all joints from manual shutoff valve to gas inlet pipe. Apply mixture of
liquid soap and water to gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6, Turn on furnace (see Operating Furnace, page 20). Check the rest of the internal
joints for leaks.
7. Turn off furnace (see To Turn OffGas to Furnace, page 22).
On Position
Off Position
Figure 16 - Manual Shutoff Valve
20f8A2
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