Desa Tech 18, B, 28 installation manual Checking, Connections, Connecting, To Gas, Supply, Continued

CONNECTING	IMPORTANT:	Hold pressure regulator with wrench when connecting it to gas piping
TO GAS	and/or fittings.
		Pressure
SUPPLY
		Regulator
Continued
	1/2" NPT
	Pipe Nipple
				Heater
			Ground Joint Union	Cabinet
		Tee Joint	Manual
	Test	Reducer	Shutoff
			Valve *
	Gauge	Bushing to
	Connection *	1/8" NPT	From
		1/8" NPT	Gas Meter
			(4" W.C. to
		Plug Tap
			10.5" W.C. Pressure)
	Sediment	Tee Joint
		Pipe
	Trap		3" Minimum
		Nipple
		Cap
			Figure 13 - 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 30.

CHECKING	WARNING ICONG 001WARNING
GAS
	Test all gas piping and connections for leaks after installation or
CONNECTIONS	servicing. Correct all leaks at once.
	WARNING ICONG 001WARNING
	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 15

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