Design Dynamics VTD-18N-PDG installation manual Installation, Natural Gas, Propane/LP Gas

INSTALLATION

Continued

CAUTION: Never connect propane/LP fireplace directly to the propane/LP supply. This heater requires an external regu- lator (not supplied). Install the external regulator between the heater and propane/LP supply.

WARNING: Never connect natural gas fireplace to private (non-utility) gas wells. This gas is commonly known as wellhead gas.

Installation Items Needed

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

•external regulator (for propane/LP units only, supplied by installer)

•piping (check local codes)

•sealant (resistant to propane/LP gas)

•equipment shutoff valve *

•test gauge connection *

•sediment trap

•tee joint

•pipe wrench

•approved flexible gas line with gas connector (if allowed by local codes) (provided)

*A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 19.

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" of water. If you do not reduce incoming gas pres- sure, heater 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.Usepipeof1/2"diameteror greatertoallowpropergasvolume toheater.Ifpipeistoosmall,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 heater (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.

Propane/LP
Supply Tank	External
	Regulator
	Vent
	Pointing
	Down

Figure 6 - External Regulator With Vent

Pointing Down

To Gas

Control CSA Design-Certified

Equipment Shutoff Valve

With 1/8" NPT Tap*

	Natural Gas
	From Gas Meter
Approved	(5" W.C.** to 10.5"
	W.C. Pressure)
Flexible Gas
	Propane/LP Gas
Hose (if allowed
	From External
by local codes)
	Regulator
	(11" W.C.** to
3" Minimum	14" W.C.
	Pressure)

Cap Pipe Tee

Nipple Joint

Sediment Trap

Figure 7 - Gas Connection

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

Accessories, page 25.

** Minimum inlet pressure for purpose of input adjustment.

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