Desa LDL3930PR, LDL3930NR Connecting To Gas Supply, Continued, Installation Items Needed

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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