Desa Connecting To Gas Supply, CGN10A AND CGN6 NATURAL GAS HEATER, Gas Connection

CGN10A AND CGN6

NATURAL GAS HEATER

CONNECTING TO GAS

SUPPLY

IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/ or fittings.

NOTICE: A qualified service per- son must connect heater to gas supply. Follow all local codes.

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

IMPORTANT: Check gas line pressure before connecting heater to gas line. Gas line pressure must be no greater than 14 inches of water. If gas line pressure is higher, heater regulator damage could occur.

CAUTION: Use only new, black iron or steel pipe. Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe 3/8" diameter or greater to allow proper gas vol- ume to heater. If pipe is too small, undue loss of pressure will oc- cur.

3/8" NPT

Pipe

Nipple

Ground Joint Union

Manual Shutoff Valve *

From Gas Meter

(4" W.C. to 10.5" W.C. Pressure)

3" Minimum

Pressure

Regulator

Heater

Cabinet

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

Tee
Joint
Pipe	Sediment Trap
Nipple
Cap

Installation must include a manual shutoff valve, ground joint 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 12).

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.

*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 Accessory, page 15.

Figure 12 - Gas Connection

8 101870