12

INSTALLATION

Connecting To Gas Supply

INSTALLATION

Continued

CONNECTING TO GAS SUPPLY

IMPORTANT: Install equipment shutoff valve in an accessible

 

 

location. The equipment shutoff valve is for turning on or shutting

WARNING: This appliance requires a 1/2" NPT

 

off the gas to the appliance.

 

 

(National Pipe Thread) inlet connection to the pres-

 

Check your building codes for any special requirements for locating

sure regulator.

 

equipment shutoff valve to fireplaces.

 

 

Apply pipe joint sealant lightly to male NPT threads. This will

 

 

WARNING: A qualified service person must con-

 

 

prevent excess sealant from going into pipe. Excess sealant in pipe

nect heater to gas supply. Follow all local codes.

 

could result in clogged heater valves.

 

 

 

 

 

 

CAUTION: Never connect propane/LP fireplace

 

WARNING: Use pipe joint sealant that is resistant

directly to the propane/LP supply. This heater requires

 

to liquid petroleum (LP) gas.

an external regulator (not supplied). Install the external

 

 

We recommend that you install a sediment trap in supply line as

regulator between the heater and propane/LP supply.

 

 

shown in Figure 16. Locate sediment trap where it is within reach for

 

 

 

 

 

 

cleaning. Install in piping system between fuel supply and heater.

WARNING: Never connect natural gas fireplace to

 

 

Locate sediment trap where trapped matter is not likely to freeze. A

private (non-utility) gas wells. This gas is commonly

 

sediment trap traps moisture and contaminants. This keeps them

known as wellhead gas.

 

from going into heater controls. If sediment trap is not installed or

 

 

is installed wrong, heater may not run properly.

Installation Items Needed

 

CAUTION: Avoid damage to gas control. Hold gas

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

• external regulator (supplied by installer)

fitting with wrench when connecting it to gas piping

• piping (check local codes)

and/or fittings.

• sealant (resistant to propane/LP gas)

External Regulator

• equipment shutoff valve *

 

• test gauge connection *

Propane/LP

sediment trap

Supply Tank

tee joint

 

pipe wrench

Vent

* A CSA design-certified equipment shutoff valve with 1/8" NPT

Pointing

Down

tap is an acceptable alternative to test gauge connection. Purchase

 

the optional CSA design-certified equipment shutoff valve from

 

your dealer. See Accessories, page 27.

 

For propane/LP units, the installer must supply an external regula-

Figure 15 - External Regulator With Vent Pointing Down

tor. 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 incoming gas pressure, heater regulator damage could occur. Install external regulator with the vent point- ing down as shown in Figure 15. Pointing the vent down protects it from freezing rain or sleet.

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 of 1/2" diam- eter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of volume will occur.

Approved Flexible Gas Hose (if allowed by local codes)

Gas

CSA Design-Certified

Equipment Shutoff Valve

Control

With 1/8" NPT Tap*

 

 

3" Minimum

 

Pipe Nipple Cap

PROPANE/LP-

From External Regulator

(11" W.C.** to 14" W.C. Pressure)

NATURAL-

From Gas Meter (5" W.C.** to 10.5" W.C. Pressure)

Tee Joint

Figure 16 - Gas Connection

Sediment Trap

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 upstream from heater (see Figure 16).

*Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 27.

**Minimum inlet pressure for purpose of input adjustment.

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Desa LDL3930PR, LDL3930NR, LDL3924PR installation manual Connecting to GAS Supply, Sure regulator

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