Desa CGN10 - Manual (Page 14)

14
099404
IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping
and/or fittings.
* 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 Accessory, page 25.
Tee
Joint
Pipe
Nipple
Cap
Pressure
Regulator
Heater
Cabinet
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test
Gauge
Connection *
Ground Joint Union
3/8" NPT
Pipe Nipple
Figure 12 - Gas Connection
CHECKING
GAS
CONNECTIONS
Sediment Trap
WARNING ICON G 001
WARNING
Test all gas piping and connections for leaks after installing or
servicing. Correct all leaks at once.
3" Minimum
Manual Shutoff Valve *
From Gas Meter
(4" W.C. to
10.5" W.C. Pressure)
CONNECTING
TO GAS
SUPPLY
Continued
WARNING ICON G 001
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.