Desa CGN20 Owner's Operation And Installation Manual

Contents

9103568OWNER’S MANUALInstall sediment trap in supply line as shownin Figure 12, page 8. Locate sediment trapwhere it is within reach for cleaning. Locatesediment trap where trapped matter is notlikely to freeze. A sediment trap traps mois-ture and contaminants. This keeps themfrom going into heater controls. If sedimenttrap is not installed or is installed wrong,heater may not run properly.CAUTION: Use pipe joint seal-ant that is resistant to liquid pe-troleum (LP) gas.IMPORTANT: Hold pressure regulatorwith wrench when connecting it to gas pip-ing and/or fittings.WARNING: Test all gas pip-ing and connections for leaksafter installing or servicing. Cor-rect all leaks at once.CHECKING GASCONNECTIONSWARNING: Never use an openflame to check for a leak. Apply amixture of liquid soap and waterto all joints. Bubbles formingshow a leak. Correct all leaks atonce.PRESSURE TESTING GASSUPPLY PIPING SYSTEMTest Pressures In Excess Of 1/2PSIG1. Disconnect heater and its individualmanual shutoff valve from gas supplypiping system. Pressures in excess of1/2 PSIG will damage heater regula-tor.2. Cap off open end of gas pipe wheremanual shutoff valve was connected.3. Pressurize supply piping system by ei-ther using compressed air oropening main gas valve located on ornear gas meter.4. Check all joints of gas supply pipingsystem. Apply mixture of liquid soapand water to gas joints. Bubbles form-ing show a leak.5. Correct all leaks at once.Test Pressures Equal To orLess Than 1/2 PSIG1. Close manual shutoff valve (see Fig-ure 13).Apply pipe joint sealant lightly to malethreads. This will prevent excess sealantfrom going into pipe. Excess sealant in thepipe could result in clogged heater valves.CONNECTING TOGAS SUPPLYContinuedFigure 13 - Manual Shutoff ValveFigure 14 - Checking Gas JointsONPOSITIONOFFPOSITIONManualShutoffValveClosedOpenManualShutoffValveGas MeterControl Valve Location2. Pressurize supply piping system by ei-ther using compressed air or openingmain gas valve located on or near gasmeter.3. Check all joints from gas meter tomanual shutoff valve (see Figure 14).Apply mixture of liquid soap and wa-ter to gas joints. Bubbles forming showa leak.4. Correct all leaks at once.PRESSURE TESTINGHEATER GASCONNECTIONS1. Open manual shutoff valve (see Fig-ure 13).2. Open main gas valve located on or neargas meter.3. Make sure control knob of heater is inthe OFF position.4. Check all joints from manual shutoffvalve to control valve (see Figure 14).Apply mixture of liquid soap and wa-ter to gas joints. Bubbles forming showa leak.5. Correct all leaks at once.6. Light heater (see Operating Heater,page 10). Check the rest of the internaljoints for leaks.7. Turn off heater (see To Turn Off Gas toAppliance, page 10).8. Replace front panel.