Desa BLUE FLAME VENT-FREE NATURAL GAS HEATER installation manual Connecting To Gas Supply, Minimum

VANGUARD 6000 BTU

NATURAL GAS HEATER

CONNECTING TO GAS SUPPLY

NOTICE: A qualified service per- son must connect heater to gas supply. Follow all local codes.

WARNING: Never connect heater to private (non-utility) gas wells. This gas is commonly known as wellhead gas.

IMPORTANT: Check gas line pressure before connecting heater to gas line. Gas line pressure must be no greater than 14 inches of water. If gas line pressure is higher, heater regulator damage could occur.

CAUTION: Use only new, black iron or steel pipe. Inter- nally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe 3/8" diameter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.

Installation must include a manual shutoff valve, ground joint union, and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be up- stream from heater (see Figure 12).

Apply pipe joint sealant lightly to male threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.

CAUTION: Use pipe joint seal- ant that is resistant to liquid pe- troleum (LP) gas.

Install sediment trap (trap) in supply line as shown in Figure 12. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps mois- ture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.

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

	Pressure
	Regulator
3/8" NPT
Pipe Nipple
	Heater
	Cabinet
Ground Joint Union
Manual	Tee Joint
Shutoff	Reducer
Valve *			Test
	Bushing to
From			Gauge
	1/8" NPT
			Connection *
External
Regulator	1/8" NPT
(4" W.C. to	Plug Tap
10.5" W.C.
Pressure)	Tee
3" Minimum	Joint
		Sediment Trap
	Pipe
	Nipple

Cap

*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 15.

Figure 12 - Gas Connection

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