Desa (V)VC42N SERIES Owner's Operation And Installation Manual

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1919www.desatech.com116236-01BFIREPLACE INSTALLATIONContinuedFIREPLACE INSTALLATIONInstalling Gas Piping to Fireplace Location (Cont.)Connecting Fireplace to Gas SupplyChecking Gas ConnectionsCAUTION: Use only new, black iron or steel pipe.Internally-tinned copper tubing may be used in certainareas. Check your local codes. Use pipe of 1/2" diameteror greater to allow proper gas volume to fireplace. Ifpipe is too small, undue loss of volume will occur.Installation must include an equipment shutoff valve, union andplugged 1/8" NPT tap. Locate NPT tap within reach for test gaugehook up. NPT tap must be upstream from fireplace (see Figure 31).IMPORTANT: Install main gas valve (equipment shutoff valve)in an accessible location. The main gas valve is for turning on orshutting off the gas to the appliance.Check your building codes for any special requirements for locatingequipment shutoff valve to fireplaces.Apply pipe joint sealant lightly to male NPT threads. This willprevent excess sealant from going into pipe. Excess sealant in pipecould result in clogged fireplace valves.WARNING: Use pipe joint sealant that is resistantto liquid petroleum (LP) gas.We recommend that you install a sediment trap/drip leg in supplyline as shown in Figure 31. Locate sediment trap/drip leg where itis within reach for cleaning. Install in piping system between fuelsupply and fireplace. Locate sediment trap/drip leg where trappedmatter is not likely to freeze. A sediment trap traps moisture andcontaminants. This keeps them from going into fireplace gas con-trols. If sediment trap/drip leg is not installed or is installed wrong,fireplace may not run properly.Figure 31 - Gas ConnectionCSA Design-CertifiedEquipment Shutoff Valvewith 1/8" NPT Tap*3" MinimumApproved FlexibleGas LineCap Pipe Nipple Tee JointSediment Trap/Drip LegNatural - FromGas Meter (5.5"W.C. to 10.5"W.C. Pressure)Propane/LPFrom ExternalRegulator (11"W.C. to 14" W.C.Pressure)* The CSA design-certified equipment shutoff valve may be suppliedwith the appliance or you can purchase it from your retailer.CHECKING GAS CONNECTIONSWARNING: Test all gas piping and connections ,internal and external to unit, for leaks after installingor servicing. Correct all leaks at once.WARNING: Never use an open flame to check fora leak. Apply noncorrosive leak detection fluid to alljoints. Bubbles forming show a leak. Correct all leaksat once.Pressure Testing Gas Supply Piping SystemTest Pressures In Excess Of 1/2 PSIG (3.5 kPa)1. Disconnect fireplace and its individual equipment shutoff valvefrom gas supply piping system. Pressures in excess of 1/2 psig(3.5 kPa) will damage fireplace gas regulator.2. Cap off open end of gas pipe where equipment shutoff valvewas connected.3. Pressurize supply piping system by either opening propane/LPsupply tank valve for propane/LP gas fireplace or opening maingas valve located on or near gas meter for natural gas fireplaceor using compressed air.4. Check all joints of gas supply piping system. Apply noncor-rosive leak detection fluid to all joints. Bubbles forming showa leak. Correct all leaks at once.CONNECTING FIREPLACE TO GAS SUPPLYInstallation Items Needed• 5/16" hex socket wrench or nut-driver• sealant (resistant to propane/LP gas, not provided)1. Open lower louver door panel by gently pulling forward.2. Route flexible gas line (provided by installer) from equipmentshutoff valve to fireplace. Route flexible gas supply line throughone of the access holes on side of fireplace.3. Attach flexible gas line from gas supply to control valve (seeFigure 32).4. Check all gas connections for leaks. See Checking GasConnections.Figure 32 - Connecting Flexible Gas Line to Millivolt ValveFlexible Gas LineDo NOT KinkEquipmentShutoff ValveTo Gas Supply(Natural)To ExternalRegulator(Propane/LP)Control Valve