Vanguard Heating VGN30 - Manual (Page 11)

11
IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping
and/or fittings.
Pressure
Regulator
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test
Gauge
Connection *
Sediment
Trap
Tee Joint
Pipe
Nipple
Cap
Manual
Shutoff
Valve *
Heater
Cabinet
1/2" NPT
Pipe Nipple
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.
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.
!
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.
CHECKING
GAS
CONNECTIONS
!
WARNING ICON G 001
WARNING
Test all gas piping and connections for leaks after installing or
servicing. Correct all leaks at once.
Continued
Ground Joint
Union
Note: Burner bracket
not shown for clarity
From Gas Meter
(4" W.C. to 10.5" W.C. Pressure)
3" Minimum