Desa CGB3930NRA, CGD3924NRA Connecting to GAS Supply, Attaching Flexible Gas Hose to Heater

OWNER’S MANUAL

INSTALLATION

Continued

7.Attach base assembly to fireplace floor using two masonry screws (in hardware package) (see Figure 12).

8.Connect to gas supply. See Connect- ing To Gas Supply.

Flexible Gas Hose (if allowed by local codes)

Fitting

Figure 11 - Attaching Flexible Gas Hose to Heater

Masonry Screw

Mounting

Flanges

Figure 12 - Attaching Base Assembly to Fireplace Floor

CONNECTING TO GAS SUPPLY

WARNING: A qualified service person must connect heater to gas supply. Follow all local codes.

Installation Items Needed

Before installing heater, make sure you have the items listed below.

•piping (check local codes)

•sealant (resistant to propane/LP gas)

•manual shutoff valve *

•test gauge connection *

•sediment trap

•tee joint

•pipe wrench

*An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Pur- chase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 27.

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

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 of 1/2" diameter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.

Approved Flexible Gas Hose (if allowed by local codes)

Gas

Control

Figure 13 - Gas Connection

Installation must include a manual shutoff valve, union, and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 13).

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 in supply line as shown in Figure 12. Locate sediment trap where it is within reach for cleaning. Locate sedi- ment 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.

CAUTION: Avoid damage to regulator. Hold gas regulator with wrench when connecting it to gas piping and/or fittings.

A.G.A. Design-Certified

Manual Shutoff Valve

With 1/8" NPT Tap*

From Gas Meter (5" W.C.** to 10.5" W.C. Pressure)

	Tee
3" Minimum	Joint	Sedi-
	Pipe
		ment
	Nipple
		Trap
	Cap

*Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 27.

** Minimum inlet pressure for purpose of input adjustment. Continued

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