Desa Tech RFP30T installation manual Connecting to GAS Supply

TO 30,000 BTU/HR

INSTALLATION

Continued

CONNECTING TO GAS SUPPLY

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

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

_lb 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 21. 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.

Supply Tank

Propane/LP

External

Regulator

Vent

Poirting

Down

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

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

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

CAUTION: Use only new, black Iron or steel pipe. Inter- nally-tlnned copper tubing may be used in certain areas. Check your local codes. Use pipe of 1/2"

or greater diameter to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.

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 21).

IMPORTANT: Hold pressure regulator

with wrench when connecting it to gas pip- ing and/or fittings.

Pressure

Regulator

3/8" NPT

FTee Joint

Test Reducer

Gauge ,_ Bushingto

Condition* I 1/8" NPT

11/8" NPT

L.PlugTap

-Tee Joint

Sediment I -.

Tr _ Fipe

ap -]Nipple

L Cap

Figure 21 - Gas Connection

Figure 20 - External RegulMor with Vent

Pointing Down

Note: Burnerbracket notshownfor clarity

Heater

Cabinet

Joint

Manual

-Shutoff Valve *

From External

Regulator (11"

W.C. to 14"W.C.

Pressure)

Minimum

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.

*An A.G.A. design-certified manual shutoff valve with 1/8" _ tap is an acceptable alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 21.

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