Related Manuals for Desa R35D
Summary of Contents for Desa R35D
- Page 1 SECTION A SERVICE MANUAL LOW PRESSURE PORTABLE FORCED AIR HEATER HOT SURFACE IGNITION MODELS...
- Page 2 Hot Surface Ignition Models Service Manual SAFETY INFORMATION h)Fuel storage shall be in accordance with the federal, state, or local authority having jurisdiction. • Never use heater where gasoline, paint thinner, or other WARNINGS highly flammable vapors are present. • Follow all local ordinances and codes when using heater.
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Page 3: Table Of Contents
Arrangement of Manual ........3 This manual contains information and service procedures to assist the service technician in understanding and correcting problems on DESA International oil-fired portable forced air III. Service Preparation ........... 3 heaters. The first section of the manual contains basic infor- IV. -
Page 4: Tools Required
Hot Surface Ignition Models Service Manual IV. TOOLS REQUIRED V. PARTS In addition to common hand tools, the service shop should In addition to the standard parts we now offer parts kits. Listed have the following tools and instruments for proper repairing below are the item numbers and the accessory description of the heaters. -
Page 5: Specifications
Hot Surface Ignition Models Service Manual SPECIFICATIONS 3. Ventilation The heater should be used only in well-ventilated areas. As a I. GENERAL SPECIFICATIONS rule, the following minimum requirements should be followed. HEATER SIZE (BTU) SQUARE FOOT OPENING 1. Fuel Selection 35,000/40,000 1.0 Sq. -
Page 6: Heater Performance Specifications
Fuel Hot Air AMPS Rating Part No. Part No. R.P.M. Horsepower Board Tank Output (Running) ± .1 ± 5% Capacity (C.F.M.) (Gal) R35D 35,000 100735-02 0.30 100088-01 1725 1/15 102548-03 104068-03 PP200 REM35C (HA3006) (102001-01) (PP206) PP200 40,000 100735-02 0.30... -
Page 7: Component Operation
Hot Surface Ignition Models Service Manual COMPONENT OPERATION 3. Nozzle As mentioned previously, the purpose of the air pump is to I. AIR SYSTEM compress air and deliver it to the nozzle. The compressed air, as it travels through the nozzle, creates a negative pressure 1. -
Page 8: Ignition Control/Photocell
Hot Surface Ignition Models Service Manual 2. Ignition Control/Photo Cell 3. Hot Surface Ignitor PP200 The ignition control circuit consists of a photocell (light sensi- All models will use 102548-03 Ignitor Kit. tive resistor) and an ignition control. The photocell is used to The hot surface ignitor is rated for 120 volts. -
Page 9: Combustion System
Hot Surface Ignition Models Service Manual IV. COMBUSTION SYSTEM V. ALL SYSTEMS WORKING TOGETHER Air being blown by the fan is directed by the air deflectors into There are four basic systems within the heater: the fuel the combustion chamber through the two louvers and center system, the air system, the electrical system, and the com- opening in the rear head which is riveted to the back of the bustion system. -
Page 10: Troubleshooting
Hot Surface Ignition Models Service Manual TROUBLESHOOTING Calibration IMPORTANT: This tester will not function properly without I. SAFETY REQUIREMENTS adequate battery power. Prior to using the tester, the full load battery voltage must be verified as follows. This service manual is intended for use by individuals with an adequate knowledge of electrical and mechanical skills. - Page 11 Hot Surface Ignition Models Service Manual OBSERVED FAULT Motor Starts and Runs but Fuel Does Not Ignite Does Ignitor Element Heat Up? WARNING: High Voltage! Check for Proper Pump Pressure Check for Check for Restricted Fuel Flow Defective Ignitor Due to: Defective Ignition A.
- Page 12 Hot Surface Ignition Models Service Manual 3 Check for Proper Pump Pressure 4 Check for Restricted Fuel Flow Install HA1180 Pressure Gauge or equivalent to rear of 35,000 to 165,000 Btu Models Remove air and fuel lines air filter housing. Start heater and adjust air pressure to from nozzle adapter.
- Page 13 Hot Surface Ignition Models Service Manual B. Restriction in Nozzle or Nozzle Adapter 5 Fuel Filter Restriction Using a compressed air source, blow the compressed The fuel filter should be inspected and cleaned (see sec- air through the outlet end of nozzle to dislodge any for- tion III, Fuel System (Fuel Filters), page 8.
- Page 14 Hot Surface Ignition Models Service Manual OBSERVED FAULT Ignitor Element Heats Up But Motor Does Not Start Within Five Seconds Rotate Fan by Hand to Determine if Fan Rotates Easily Fan is Difficult to Rotate Fan Rotates Easily by Hand Broken Rotor or Blades Open Motor Winding Improper Rotor Clearance...
- Page 15 Hot Surface Ignition Models Service Manual 4 Dry Motor Bearing If the fan is difficult to turn with air pump parts removed, then motor bearings are defective. Bearings are perma- nently lubricated, therefore motor should be replaced. 5 Open Motor Windings Disconnect motor wires (red and white) from ignition con- trol assembly.
- Page 16 Hot Surface Ignition Models Service Manual 6 Defective Ignition Control Assembly Disconnect motor wires from control. Attach voltmeter leads to motor terminals on control. Use 0 to 200 V.A.C. scale on meter. Plug power cord into a 120V/60 Hz grounded outlet. Meter should read 0 volts for five sec- onds, 120 volts for 3 to 4 seconds, then drop to 0 volts.
- Page 17 Hot Surface Ignition Models Service Manual OBSERVED FAULT Ignitor Does Not Heat Up and Motor Does Not Start Within 5 Seconds Possible Causes External to Heater Possible Causes Internal to Heater Circuit Breaker is Tripped Bad Electrical Connection(s) or Wired Incorrectly Check for Broken or Frayed Wires on Power Cord or Extension Cord Blown Fuse on Ignition Control...
- Page 18 Hot Surface Ignition Models Service Manual OBSERVED FAULT Ignitor Heats Up, Motor Starts and Runs, and Fuel Ignites, But Heater Shuts Off After a Short Period of Time Ignition Control Trips out Within the Safety Control Trips out After First Ten Seconds of Operation Ten Seconds of Operation Defective Ignition Control Photocell Boot Not Properly Seated...
- Page 19 Hot Surface Ignition Models Service Manual 2 Defective or Dirty Photocell Assembly Inspect the lens of the photocell for soot/dirt, etc... If dirty, wipe off with a clean, damp cloth. Remove photocell assembly from heater. Turn the toggle switch on the HA1170 tester to the "solid" red LED posi- tion.
- Page 20 Hot Surface Ignition Models Service Manual 5 Check for Proper Pump Pressure 6 Dirty/Clogged Air Filters in Compressor Install HA1180 Pressure Gauge or equivalent to rear of Inspect and replace air intake, air output, and lint filter if air filter housing. Start heater and adjust air pressure to necessary.
- Page 21 Hot Surface Ignition Models Service Manual 8 Fuel Cap and Gasket Not Vented 7 Check for Restricted Fuel Flow Remove fuel cap and inspect the vent hole and gasket 35,000 to 165,000 Btu Models Remove air and fuel lines to make sure the passage is open. Verify that only one from nozzle adapter.
- Page 22 Hot Surface Ignition Models Service Manual OBSERVED FAULT Delayed Igniton Wrong Fuel Contaminated or Old Fuel TEST PROCEDURE 1 Wrong Fuel Refer to Fuel Selection on page 5 of this manual. 2 Contaminated or Old Fuel Fuel may not be fresh or may be contaminated with wa- ter or other foreign liquids.
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Page 23: Wiring Diagrams
Hot Surface Ignition Models Service Manual WIRING DIAGRAMS White AC Neutral (L2) Blue Photocell Photocell Blue Photocell Green White Motor Return ATTENTION: Earth ground must be connected to ensure operator safety! Green Ignitor Motor Motor Black AC Hot (L1) Ignitor Gray Ignitor Gray... - Page 24 www.desatech.com www.PartsFor.com For replacement parts contact:...