Desa DCFTNA installation manual Connecting to GAS Supply, Sediment Trap

INSTALLATION

Continued

CONNECTING TO GAS SUPPLY

WARNING: This appliance requires a 45° male flare fitting 5/8"-18 UNF (Unified National Fine Thread) inlet connection and the flexible gas line provided.

WARNING: A qualified service person must connect fireplace to gas supply. Follow all local codes.

WARNING:Neverconnectnatu- ralgasfireplacetoprivate(non-util- ity)gaswells.Thisgasiscommonly known as wellhead gas.

IMPORTANT: For natural gas, check gas line pressure before connecting fireplace to gas line. Gas line pressure must be no greater than 14 inches of water. If gas line pressure is higher, heater regulator damage could occur.

CAUTION:Neverconnectpro- pane/LP fireplace directly to the propane/LPsupply.Thisfireplace requires an external regulator (notsupplied).Installtheexternal regulator between the fireplace and propane/LP supply.

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 pressure, fireplace regulator damage could occur. Install external regulator with the vent pointing down as shown in Figure 20. Pointing the vent down protects it from freezing rain or sleet.

CAUTION:Useonlynew,black ironorsteelpipe.Internally-tinned copper tubing may be used in cer- tainareas.Checkyourlocalcodes. Usepipeof1/2"orgreaterdiameter to allow proper gas volume to fire- place. 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 heater (see Figure 21).

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 fireplace valves.

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

Propane/LP
Supply		External
Tank
		Regulator
			Vent
			Pointing
			Down
Figure 20 - External Regulator With Vent
	Pointing Down
	CSA Design-Certified
	Equipment Shutoff Valve
	With 1/8" NPT Tap*
Approved		PROPANE/LP
		From External
Flexible
		Regulator (11"
Gas Line
		W.C.** to 14" W.C.
		Pressure)
		NATURAL
		From Gas Meter
3" Minimum		(5"	W.C.** to
			10.5" W.C.
			Pressure)
Pipe Nipple Cap Tee Joint
	Sediment Trap

Figure 21 - Gas Connection

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

Accessories, page 44.

16 www.desatech.com 111244-01E