Desa Tech CGG2618P Unvented Vent-Free Gas Log Heater, Installation, Connecting To Gas Supply

UNVENTED (VENT-FREE) GAS LOG HEATER

INSTALLATION

CONNECTING TO GAS SUPPLY

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

CAUTION: Never connect heater directly to the propane/LP supply. This heater requires an

Propane/LP	External Regulator	Installation must include a manual shutoff
Supply Tank		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).

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.

external regulator (not supplied). Install the external regulator be- tween the heater and propane/LP supply.

Installation Items Needed

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

•external regulator (supplied by installer)

•piping (check local codes)

•sealant (resistant to propane/ LP gas)

•manual shutoff valve *

•test gauge connection *

•sediment trap

•tee joint

•pipe wrench

*An CSA design-certified manual shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Pur- chase the optional CSA design-certified manual shutoff valve from your dealer. See Accessories, page 28.

The installer must supply an external regu- lator. 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 incom- ing gas pressure, heater regulator damage could occur. Install external regulator with the vent pointing down as shown in Figure

13.Pointing the vent down protects it from freezing rain or sleet.

Vent Pointing Down

Figure 13 - External Regulator With Vent Pointing Down

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.

From External Regulator (11" W.C.** to

14" W.C. Pressure)

Tee Joint
Pipe	3" Minimum
Nipple
Cap
Sediment Trap

Install sediment trap in supply line as shown in Figure 14. 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.

CSA Design-Certified

Manual Shutoff Valve With

1/8" NPT Tap*

Approved Flexible Gas Hose (if allowed by local codes)

Gas

Regulator

Figure 14 - Gas Connection

*Purchase the optional CSA design-certified manual shutoff valve from your dealer. See Accessories, page 28.

**Minimum inlet pressure for purpose of input adjustment.

12 103425