Procom SN250TYLA-D Installation, Continued, Connecting To Gas Supply, NG MODELS 5” to 10.5” W.C

INSTALLATION

Continued

CONNECTING TO GAS SUPPLY

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

CAUTION: Never connect heater directly to the gas supply. This heater requires an external regulator (not supplied). lnstall the external regulator between the heater and gas supply.

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

piping (check local codes)

sealant (resistant to natural or propane/ LP gas)

equipment shutoff valve* test gauge connection* sediment trap

see joint pipe wrench

flexible gas hose (check local codes)

*A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-cer-

tified equipment shutoff valve and flex

hose from your dealer. See Accessories, page 14.

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

The installer must supply an external regulator. The external regulator will re- duce incoming gas pressure. You must reduce incoming gas pressure to between 11 to 14 inches. If you do not reduce in- coming gas pressure, heater regulator dam- age could occur. lnstall external regulator with the vent pointing down as shown in Figure 6. Pointing the vent down protects it from freezing rain or sleet.

CAUTION: Only use a new black iron or steel pipe. Internally-tinned cop- per 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.

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 up- stream from heater (see Figure 7).

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.

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

CAUTION: Use pipe joint sealant that is resistant to liquid petroleum(LP) gas.

We recommend that you install a sedi- ment trap in supply line as shown in Figure 7. Locate sediment trap where it is within reach for cleaning. Install in piping system between fuel supply and heater. Locate sediment trap where trapped mat- ter 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 in- stalled or is installed incorrectly, heater may not run properly.

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

NG MODELS: 5” to 10.5” W.C.

Gas supplier provides external regula- tor for natural gas.

	Front View
Side View	Figure 6- External Regulator
	With Vent Pointing Down

Front of heater unit

Gas Regulator

Inlet Connection

Figure 5-Gas Regulator Location and

Gas Line Access Into Heater Cabinet

Figure 7 -Gas Connection

*Purchase the optional CSA design-certified equipment shutoff valve and flex hose from your dealer. See Accessories, page 14.

**11” W.C. pressure is the minimum inlet pressure for purpose of input adjustment.

7