Desa VP5A, VP11 Checking Gas Connections, Pressure Testing Gas Supply Piping System, Continued

IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings.

Pressure

Regulator

3/8" NPT Pipe Nipple

Ground Joint Union

Heater Cabinet

Manual

Shutoff

Valve *

From External

Regulator

(11" W.C. to 14" W.C.

Pressure)

3" Minimum

Tee Joint		Test
Reducer
Bushing to		Gauge
1/8" NPT	Connection *
1/8" NPT
Plug Tap

Tee
Joint
Pipe	Sediment
	Trap
Nipple
Cap

CHECKING GAS CONNECTIONS

10

Figure 11 - 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 ACCESSORY, page 21.

!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.

!CAUTION

Make sure external regulator has been installed between propane supply and heater. See guidelines under CONNECTING TO GAS SUPPLY, page 9.

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.

Continued