Desa GVR65BPA, GVR65PA, GVR50PA, GVR35PA, GVR50BPA installation manual Installing Heater, Continued

INSTALLING HEATER

Continued

Installation must include a manual shutoff valve, ground joint union, plugged 1/8" NPT tap and a sediment trap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 7).

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

WARNING ICON G 001

Use pipe joint sealant that is resistant to liquid petro- leum (LP) gas.

Install sediment trap in supply line as shown in Figure 7. 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 moisture 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: Use two pipe wrenches when connecting gas piping to gas control valve of heater. This will prevent turning or damaging control valve.

Control

Valve

Ground

Joint

Union

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

Acceptable construction of inlet gas line

	From External
	Regulator (11"
Manual	W.C. Min** to
	14" W.C. Max)
Shutoff
Valve *
	Preferred
	construction
	of inlet gas
	line
	From
Tee Joint	External
	Regulator
Pipe	(11" W.C.
	Min** to
Nipple
	14" W.C.
Cap	Max)

12

Figure 7 - 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 37.

**For purposes of input adjustment.

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