Desa GWRN10 Safety Information And Installation Manual

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Desa GWRN10 Safety Information And Installation Manual Manual pdf 9 page image

107902-01D99For more information, visit www.desatech.comFor more information, visit www.desatech.comINSTALLATIONContinuedINSTALLATIONConnecting To Gas Supply (Cont.)Checking Gas ConnectionsFigure 13 - Gas Connection* A CSA design-certified equipment shutoff valve with 1/8" NPTtap is an acceptable alternative to test gauge connection. Purchasethe optional CSA design-certified equipment shutoff valve fromyour dealer. See Accessory, page 29.We recommend that you install sediment trap in supply line asshown in Figure 13. Locate sediment trap where it is within reach forcleaning. Install in piping system between fuel supply and heater.Locate sediment trap where trapped matter is not likely to freeze. Asediment trap traps moisture and contaminants. This keeps themfrom going into heater controls. If sediment trap is not installed oris installed wrong, heater may not run properly.IMPORTANT: Hold pressure regulator with wrench when con-necting it to gas piping and/or fittings. Do not over tighten pipeconnection to regulator. The regulator body could be damaged.Tee JointReducerBushing to1/8" NPT1/8" NPTPlug TapTestGaugeConnection*TeeJointPipeNippleCapPressureRegulatorHeaterCabinet3/8" NPTPipe NippleGroundJoint UnionSedimentTrap3" MinimumNatural GasFrom Gas Meter(4" W.C. to 10.5"W.C. Pressure)Propane/LPFrom ExternalRegulator(11" W.C. to 14"W.C. Pressure)EquipmentShutoff Valve*CHECKING GAS CONNECTIONSWARNING: Test all gas piping and connectionsfor leaks after installing or servicing. Correct all leaksat once.WARNING: Never use an open flame to check fora leak. Apply a noncorrosive leak detection fluid to alljoints. Bubbles forming show a leak. Correct all leaksat once.CAUTION: For propane/LP gas, make sure exter-nal regulator has been installed between propane/LPsupply and heater. See guidelines underConnectingto Gas Supply, pages 8 and 9.Pressure Testing Gas Supply Piping SystemTest Pressures In Excess Of 1/2 PSIG (3.5 kPa)1. Disconnect appliance with its appliance main gas valve (controlvalve) and equipment shutoff valve from gas supply piping sys-tem. Pressures in excess of 1/2 psig will damage heater 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 or opening main gas valvelocated on or near gas meter for natural gas, or using com-pressed air.4. Check all joints of gas supply piping system. Apply a noncorrosiveleak detection fluid to all joints. Bubbles forming show a leak.5. Correct all leaks at once.6. Reconnect heater and equipment shutoff valve to gas supply.Check reconnected fittings for leaks.Installation must include equipment shutoff valve, union, and plugged1/8" NPT tap. Locate NPT tap within reach for test gauge hook up.NPT tap must be upstream from heater (see Figure 13).IMPORTANT: Install an equipment shutoff valve in an accessiblelocation. The equipment shutoff valve is for turning on or shuttingoff the gas to the appliance.Apply pipe joint sealant lightly to male NPT threads. This willprevent excess sealant from going into pipe. Excess sealant in pipecould result in clogged heater valves.WARNING: Use pipe joint sealant that is resistantto liquid petroleum (LP) gas.