Desa A, B, C Owner's Operation And Installation Manual

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Desa A, B, C Owner's Operation And Installation Manual Manual pdf 13 page image

104415For more information, visit www.desatech.comFor more information, visit www.desatech.com1313INSTALLATIONContinuedFigure 16 - Gas Connection (Variable Manually-Controlled andThermostatically-Controlled Models Only)* Purchase the optional CSA design-certified equipment shutoff valvefrom your dealer. See Accessories, page 36.**Minimum inlet pressure for purpose of input adjustment.Figure 17 - Gas Connection (Remote-Ready Models Only)Gas ControlTee Cap PipeJoint Nipple3" MinimumGas RegulatorPROPANE/LPFrom ExternalRegulator(11" W.C.**to 14" W.C.Pressure)CSA Design-Certified EquipmentShutoff Valve With 1/8" NPT Tap*Approved FlexibleGas Hose (if allowedby local codes)Sediment TrapNATURALFrom GasMeter(5" W.C.**to 10.5" W.C.Pressure)Pipe Cap TeeNipple Joint3" MinimumSediment TrapPROPANE/LP -From ExternalRegulator(11" W.C.**to 14" W.C.Pressure)NATURAL -From GasMeter(5" W.C.**to 10.5" W.C.Pressure)CSA Design-Certified EquipmentShutoff Valve With 1/8" NPT Tap*Approved FlexibleGas Hose (if allowedby local codes)WARNING: Test all gas piping and connectionsfor leaks after installing or servicing. Correct allleaks at 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: Make sure external regulator has beeninstalled between propane/LP supply and heater. Seeguidelines underConnecting to Gas Supply, page 12.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/LP sup-ply tank valve for propane/LP gas or opening main gas valve lo-cated on or near gas meter for natural gas, or using compressed air.4. Check all joints of gas supply piping system. Apply 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.Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)1. Close equipment shutoff valve (see Figure 18, page 14).2. Pressurize supply piping system by either opening propane/LP sup-ply tank valve for propane/LP gas or opening main gas valve lo-cated on or near gas meter for natural gas, or using compressed air.3. Check all joints from gas meter to equipment shutoff valve fornatural gas or propane/LP supply to equipment shutoff valvefor propane/LP (see Figure 19, page 14). Apply noncorrosiveleak detection fluid to all joints. Bubbles forming show a leak.4. Correct all leaks at once.CHECKING GAS CONNECTIONSINSTALLATIONConnecting to Gas Supply (Cont.)Checking Gas Connections