Desa VMH3000TPA Owner's Operation And Installation Manual

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109889For more information, visit www.desatech.comFor more information, visit www.desatech.com1313INSTALLATIONContinuedPressure 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 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 a noncor-rosive leak detection fluid to gas joints. Bubbles forming showa 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 20).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(see Figure 21) for natural gas, or to propane/LP supply tank(see Figure 22). Apply a noncorrosive leak detection fluid togas joints. Bubbles forming show a leak.4. Correct all leaks at once.Pressure Testing Heater Gas Connections1. Open equipment shutoff valve (see Figure 20).2. Open main gas valve located on or near gas meter for naturalgas or open propane/LP supply tank valve for propane/LP gas.3. Make sure control knob of heater is in the OFF position.4. Check all joints from equipment shutoff valve to thermostatgas valve (see Figure 21 or 22). Apply a noncorrosive leakdetection fluid to gas joints. Bubbles forming show a leak.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.5. Correct all leaks at once.6. Light heater (see Operating Heater, pages 14 and 15). Checkall other internal joints for leaks.7. Turn off heater (see To Turn Off Gas to Appliance, page 15).8. Replace front panel.OPOSPOOpenClosedEquipmentShutoffValveFigure 20 - Equipment Shutoff ValveFigure 21 - Checking Gas Joints (Natural Gas)Thermostat GasValve LocationGas MeterEquipmentShutoffValveFigure 22 - Checking Gas Joints (Propane/LP Gas)Propane/LPSupply TankThermostat GasValve LocationEquipmentShutoffValveINSTALLATIONChecking Gas Connections