Desa VYM27NR Connecting To Gas Supply, Continued, Installation Items Needed

OWNER’S MANUAL

INSTALLATION

Continued

7.Mark screw locations through one hole on each side of the mounting flanges (see Figure 12). If installing in a brick- bottom fireplace, mark screw locations in mortar joint of bricks.

8.Remove heater base from fireplace.

9.Drill holes at marked locations using 3/16" drill bit.

10.Attach base assembly to fireplace floor using two masonry screws (in hardware package).

11.Connect to gas supply. See Connect- ing To Gas Supply, page 11.

12.Replace logs on heater base.

Flexible Gas Fitting Hose (if allowed

by local codes)

Figure 11 - Attaching Flexible Gas Hose to Heater

Masonry Screw

Mounting

Flanges

Figure 12 - Attaching Base Assembly to Fireplace Floor

CONNECTING TO GAS

SUPPLY

NOTICE: A qualified service per- son 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 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 24.

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 13. 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 control. Hold gas fitting 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
Joint
3" Minimum	Sediment
Pipe
	Trap
Nipple
Cap

*Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 24.

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

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