CHECKING GAS CONNECTIONS
IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings.
Pressure
Regulator
1/2" NPT Pipe Nipple
| Tee Joint | |
Test | Reducer | |
Gauge | Bushing to | |
Connection * | 1/8" NPT | |
| ||
| 1/8" NPT | |
| Plug Tap | |
| Tee Joint | |
Sediment | Pipe | |
Trap | ||
Nipple | ||
| Cap |
Note: Burner bracket not shown for clarity
Ground Joint | Heater | |
Cabinet | ||
Union | ||
| ||
| Manual | |
| Shutoff | |
| Valve * |
From Gas Meter
(4" W.C. to 10.5" W.C. Pressure)
3" Minimum
Figure 10 - Gas Connection
*An A.G.A. design certified manual shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional A.G.A. design certified manual shutoff valve from your dealer. See ACCESSORIES, page 23.
!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 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.
Continued 11
