Desa LDL3924NR Owner's Operation And Installation Manual

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Desa LDL3924NR Owner's Operation And Installation Manual Manual pdf 13 page image

111515-01AFor more information, visit www.desatech.comFor more information, visit www.desatech.com1313INSTALLATIONContinuedWARNING: 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 a noncorrosive leak detection fluid toall joints. Bubbles forming show a leak. Correct allleaks at once.CAUTION: Make sure external regulator has beeninstalled between propane/LP supply and heater. Seeguidelines underConnecting to Gas Supply, page 12.CHECKING GAS CONNECTIONSINSTALLATIONChecking Gas ConnectionsFigure 17 - Equipment Shutoff ValveEquipmentShutoffValveONPOSITIONOFFPOSITIONOpenClosedPressure Testing gas Supply Piping systemTest Pressures In Excess Of 1/2 PSIG (3.5 kPa)1. Disconnect appliance with its appliance main gas valve (con-trol valve) and equipment shutoff valve from gas supply pip-ing system. Pressures in excess of 1/2 psig will damage heaterregulator.2. Cap off open end of gas pipe where equipment shutoff valvewas connected.3. Pressurize supply piping system by either openingpropane/LP supply tank valve for propane/LP gas or openingmain gas valve located on or near gas meter for natural gas, orusing 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 17).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 Figures 18 and 19). Apply noncorrosiveleak detection fluid to all joints. Bubbles forming show a leak.4. Correct all leaks at once.Pressure Testing Heater Gas Connections1. Open equipment shutoff valve (see Figure 17).2. Open main gas valve located on or near gas meter for naturalgas or open propane/LP supply tank valve.3. Make sure control knob of heater is in the OFF position.4. Check all joints to gas control (see Figures 18 or 19). Applynoncorrosive leak detection fluid to all joints. Bubbles form-ing show a leak.5. Correct all leaks at once.6. Light heater (see Operating Heater, pages 15 through 17).Check all other internal joints for leaks.7. Turn off heater (see To Turn Off Gas to Appliance, page 16).Figure 18 - Checking Gas Joints (Propane/LP only)Gas ControlValve Location Propane/LPSupply TankEquipment Shutoff ValveFigure 19 - Checking Gas Joints (Natural Gas Only)Gas MeterGas ControlValve LocationEquipment Shutoff Valve