Desa PORTABLE FORCED AIR HEATERS Owner's Manual

Also see for 35,000 BTU/Hr Models: Owner's manual

Contents

Desa PORTABLE FORCED AIR HEATERS Owner's Manual Manual pdf 9 page image

9102437Pump PressureAdjustment1. Remove pressure gauge plug fromfilter end cover.2. Install accessory pressure gauge(part number HA1180).3. Start heater (see Operation, page6). Allow motor to reach full speed.4. Adjust pressure. Turn relief valveto right to increase pressure. Turnrelief valve to left to decreasepressure. See specifications at rightfor correct pressure for each model.5. Remove pressure gauge. Replacepressure gauge plug in filter endcover.ReliefValvePressureGaugePlugFigure 7 - Pressure Gauge Plug RemovalPumpModel Pressure35,000 Btu/Hr 3.0 PSI50,000 Btu/Hr 3.4 PSI55,000 Btu/Hr 3.4 PSIPressureGaugeFigure 8 - Adjusting Pump PressureFuel Filter1. Remove side cover screws using5/16" nut-driver.2. Remove side cover.3. Pull upper fuel line off fuel filterneck.4. Carefully pry bushing and fuelfilter out of fuel tank.5. Wash fuel filter with clean fuel andreplace in tank.6. Attach upper fuel line to fuel filterneck.7. Replace side cover.Air LineHoseBurnerStrap Spark PlugWireNozzle AssemblyFuel Line HoseSparkPlugSpark PlugMounting NutCombustionChamberBend Hereto AdjustGap.055" GapContinuedFigure 10 - Spark Plug RemovalFigure 11 - Spark Plug GapSpark Plug1. Remove upper shell (see page 9).2. Remove fan (see page 9).3. Remove fuel and air line hosesfrom nozzle assembly.4. Remove spark plug wire fromspark plug.5. Remove two screws using 5/16"nut-driver and remove burnerstrap.6. Place hex-body of spark plug intovise and tighten.7. Remove spark plug mounting nutusing 11/16" open-end wrench.8. Remove burner strap from sparkplug.9. Clean and regap spark plugelectrodes to .055" gap.10.Replace burner strap onto sparkplug. Rotate burner strap toposition spark plug electrodes (seeFigure 12, page 11).Figure 9 - Fuel Filter RemovalSide CoverFuel FilterUpper Fuel Line