Installation

Continued

Installation must include 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 13).

IMPORTANT: Install an equipment shutoff valve in an accessible location. The equipment 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 heaters.

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 sealant that is resistant to liquid petroleum (LP) gas.

Install sediment trap in supply line as shown in Figure 13. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contami- nants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.

IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings. Do not over tighten pipe connection to regulator. The regulator body could be damaged.

Propane/LP

External

Supply Tank

Regulator

 

 

with Vent

 

Pointing

 

Down

Figure 12 - External Regulator With Vent

Pointing Down (propane/LP only)

3/8"

 

Pressure

NPT

 

 

Regulator

Pipe

 

 

 

 

Nipple

 

Heater

 

 

Ground

 

Cabinet

 

 

Connection*

Joint

Bushing to

Shutoff

Union

Tee Joint

 

Equipment

Reducer

 

Valve*

1/8" NPT

Gauge

 

1/8" NPT

 

 

 

Plug Tap

Test

 

Tee

 

3"

 

 

Joint

 

 

Min

Pipe

Sediment

Natural Gas

Trap

 

Nipple

 

From Gas Meter

Cap

 

 

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

 

 

Pressure [See

Specifications, page 26])

Propane/LP

From External Regulator (11" W.C. to 14" W.C. Pressure)

Figure 13 - Gas Connection

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

shutoff valve from your dealer.

123995-01C

www.desatech.com

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