Desa VTD-24PV-JHB, VTD-30NV-JHB, VTD-30PV-JHB, VTD-24NV-JHB, VTD-18NV-JHB, VTD-18PV-JHB Natural Gas

Installation

Continued

For propane/LP units, the installer must supply an external regulator. 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 pres- sure, regulator damage could occur. Install external regulator with the vent pointing down as shown in Figure 6. Pointing the vent down protects it from freezing rain or sleet.

CAUTION:Useonlynew,black ironorsteelpipe.Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of 1/2" diameter or greater to allow proper gas vol- ume to heater. If pipe is too small, undue loss of volume 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 upstream from log set (see Figure 7).

IMPORTANT: Install 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 re- quirements for locating equipment shutoff valve to fireplaces.

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.

Propane/LP

Tank

External

Regulator with

Vent Pointing

Down

Figure 6 - External Regulator with Vent

Pointing Down

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

We recommend that you install a sediment 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 appliance. Locate sediment 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.

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

	CSA Design-Certified
	Equipment Shutoff
	Valve with 1/8" NPT
	Tap*
Approved
Flexible Gas		Propane/LP Gas
Hose (If allowed		From External
by local codes)		Regulator (11"
		W.C.** to 14" W.C.
3" Min.
Pipe Cap	Tee	Natural Gas
		From Gas Meter
Nipple	Joint
Sediment Trap		(5" W.C.** to 10.5"
		W.C. Pressure)

Figure 7 - Gas Connection

* Purchase the optional CSAdesign-certified shutoff valve from your dealer. See Accessories, page 17. ** Minimum inlet pressure for purpose of input adjustment.

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