Desa VYM27NR/PR, FVFM27NR/PR installation manual Connecting to GAS, Supply

OWNER’S MANUAL

INSTALLATION	CONNECTING TO GAS
Continued	SUPPLY

CAUTION: Use only new, black iron or steel pipe. Inter-

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

8.Remove heater base from fireplace. If installing optional control accessories, do so at this time. Follow all directions provided with accessory.

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).

	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

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

WARNING: Never connect propane/LP heater directly to the propane/LP supply. This heater requires an external regulator (not supplied). Install the external regulator between the heater and propane/LP supply.

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

Installation Items Needed

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

•external regulator (for propane/LP units only, supplied by installer)

•piping (check local codes)

•sealant (resistant to propane/LP gas)

•equipment shutoff valve *

•test gauge connection *

•sediment trap

•tee joint

•pipe wrench

*A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Pur- chase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 24.

For Propane/LP Gas: The installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pressure, heater regulator damage could occur. Install exter- nal regulator with the vent pointing down as shown in Figure 13. Pointing the vent down protects it from freezing rain or sleet.

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 volume will occur.

Installation must include an equipment 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 14, page 12).

IMPORTANT: Install equipment shutoff valve in an accessible location. The equip- ment shutoff valve is for turning on or shutting off the gas to the appliance.

Check your building codes for any special requirements for locating equipment shutoff valve to fireplaces.

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

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

Propane/LP

Supply

Tank

External

Regulator

Vent

Pointing

Down

Figure 13 - External Regulator With Vent Pointing Down (propane/LP gas only)

Continued

108382 11 For more information, visit www.desatech.com