Desa R110B Service Manual Download Page 21 | Manualshive

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21

Hot Surface Ignition Models Service Manual

8 Fuel Cap and Gasket Not Vented

Remove fuel cap and inspect the vent hole and gasket
to make sure the passage is open. Verify that only one
gasket has been installed. The fuel tank must be vented
properly for the fuel delivery system to operate correctly.

Nozzle Face

Nozzle

Nozzle
Seal

Nozzle
Adapter
Bracket

Air Line
Fitting

Fuel Line Fitting

Nozzle
Adapter

Combustion
Chamber

Nozzle/
Adapter
Assembly

35,000 - 165,000 Btu Models

Nozzle Face

Nozzle

Nozzle
Seal

Nozzle
Adapter

Air Line
Fitting

Fuel Line
Fitting

200,000 Btu Models

7 Check for Restricted Fuel Flow

35,000 to 165,000 Btu Models Remove air and fuel lines
from nozzle adapter. Remove nozzle adapter/nozzle from
bracket.

200,000 Btu Model Remove ignitor (do not strike or bend
element) from bracket. Place in a safe location. Remove
air and fuel lines from nozzle adapter. Remove two
bracket screws and remove bracket, nozzle adapter and
nozzle assembly from combustion chamber.

Using a 5/8" socket wrench, carefully remove the nozzle
from nozzle adapter. (Be extremely careful not to scratch
or score the face of the nozzle).

A. Seal Leak

Inspect nozzle seal or o-ring for damage. Replace if nec-
essary.

For replacement parts contact:

www.PartsFor.com

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Summary of Contents for R110B

Page 1: ...SERVICE MANUAL LOW PRESSURE PORTABLE FORCED AIR HEATER HOT SURFACE IGNITION MODELS SECTION A ...

Page 2: ...reas where floor penetrations do not permit fuel to drip onto or be ignited by a fire at lower elevation 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 highly flammable vapors are present Follow all local ordinances and codes when using heater Heaters used in the vicinity of tarpaulins canva...

Page 3: ...he heater This information should be reviewed by service personnel to provide a basic understanding of how the com ponents function in the working system The Troubleshooting section of this manual is intended to provide a quick reference concerning conditions which result in customer complaints These procedures will help the service technician quickly diagnose a malfunctioning heater The illustrat...

Page 4: ...55 Models PP219 Nozzle 60 Models PP220 Nozzle 70 Models PP221 Nozzle 110 115 Models PP222 Nozzle 150 155 Models PP223 Nozzle 165 Models PP235 Nozzle 200 Models PP200 Hot Surface Ignitor PP213 Air Filter Kit 35 40 50 55 60 70 Models PP214 Filter Kit 110 115 150 155 165 200 Models PP205 Rotor Kit 5 8 M16656 24 Photocell PP217 Pump Adjustment Kit IV TOOLS REQUIRED In addition to common hand tools the...

Page 5: ...erizing additive at temperatures below 20 F 3 Ventilation The heater should be used only in well ventilated areas As a rule the following minimum requirements should be followed HEATER SIZE BTU SQUARE FOOT OPENING 35 000 40 000 1 0 Sq Ft 50 000 55 000 60 000 1 6 Sq Ft 70 000 2 1 Sq Ft 110 000 115 000 3 2 Sq Ft 150 000 155 000 4 5 Sq Ft 165 000 5 0 Sq Ft 200 000 6 0 Sq Ft The above is based on vent...

Page 6: ...103609 01 3450 1 8 102548 03 104068 02 5 0 250 2 8 R70DT HA3026 102001 20 R110B 110 000 5 3 100735 19 0 80 103493 01 3450 1 5 102548 03 104068 02 9 0 490 3 6 R110BT HA3027 102001 21 R115 115 000 5 3 100735 19 0 80 103493 01 3450 1 5 102548 03 104068 02 9 0 490 3 6 REM115 HA3027 102001 21 RM115 REM150E 150 000 5 4 100735 20 1 10 103493 01 3450 1 5 102548 03 104068 02 13 5 550 3 6 HA3028 102001 21 R...

Page 7: ...viously the purpose of the air pump is to compress air and deliver it to the nozzle The compressed air as it travels through the nozzle creates a negative pressure that extends back through the center of the nozzle This negativepressureliftsthefuelfromthefueltank Thefuelfrom the fuel tank and the compressed air are mixed at the nozzle which results in a very fine mist of fuel being sprayed into th...

Page 8: ...ition control The photocell is used to sense the presence of light inside the combustion chamber The resistance of the photocell changes as the light level inside the combustion chamber changes When the heater is operating properly the flame pattern inside the combustion chamberisveryturbulentwhichresultsintheresistanceofthe photocell increasing and decreasing very rapidly This dy namic change in ...

Page 9: ...N causing fuel to be drawn from the tank J The fuel air mixture is sprayed into the combustion chamber L in a fine mist Additional air is supplied to the combustion chamber by a fan O to enter the combustion chamber where it mixes with the air and fuel from the nozzle The remaining air is directed around and over the combustion chamber This air mixes with the heated air from the combustion chamber...

Page 10: ...ment parts 4 Make sure all electrical connections are secure and cor rect prior to connecting heater to a grounded electrical power source III USING THE HA1170 TESTER The HA1170 control photocell tester provides a means of troubleshooting the forced air kerosene heater by verifying the operation of the ignition control and photocell Operation The tester s toggle switch has three positions The midd...

Page 11: ...meter use 0 200 OHM scale Ignitor resistance should measure 30 to 175 OHMS If resistance measures outside of this range then ignitor is defective and should be replaced 2 Check Ignition Control Assembly Remove fuse cover and check fuse 70 000 to 200 000 Btu models only If fuse is blown replace it with a GMA 10 fuse Disconnect motor red and white wires from con trol With Ignitor wires disconnected ...

Page 12: ...apter 4 Check for Restricted Fuel Flow 35 000 to 165 000 Btu Models Remove air and fuel lines from nozzle adapter Remove nozzle adapter nozzle from bracket 200 000 Btu Model Remove ignitor do not strike or bend element from bracket Place in a safe location Remove air and fuel lines from nozzle adapter Remove two bracket screws and remove bracket nozzle adapter and nozzle assembly from combustion c...

Page 13: ...alve 200 000 Btu model only Remove upper and lower fuel lines from fittings on sole noid valve Apply 120V 60 Hz power to valve Shine a flash light at one side of valve Light should be visible from the other side when the solenoid is energized If not the valve is obstructed or defective Clean or replace as necessary 100 000 165 000 Btu Models Shown Fuel Flow Direction Flush In This Direction 5 Fuel...

Page 14: ...lades for breakage Make sure that the rotor and blades are free of any type of lubricant Rotor and blades must be clean and dry for proper operation 2 Improper Rotor Clearance Check rotor with feeler gauge for proper clearance 003 004 between rotor and pump body Rotate ro tor and make sure all four quadrants of rotor have ad equate clearance 3 Oversized Rotor If the fan is hard to turn when the mo...

Page 15: ...dings Refer to the chart below for resistances for each model If the resistance is not within the specified range motor is defective and should be replaced NOTE Resistances may vary due to motor temperature MOTOR WINDING RESISTANCE MODEL RESISTANCE RANGE OHMS 35 000 50 000 55 000 60 000 5 57 6 81 70 000 6 03 7 37 100 000 110 000 150 000 155 000 165 000 4 14 5 06 200 000 3 96 4 84 Note In some case...

Page 16: ...pacitor PSC type and are equipped with an integral start run capacitor If the resis tance of the motor windings read correctly and the igni tion control assembly is found to be working properly the capacitor may be open circuit The capacitor is wired internally and cannot be replaced No service parts are available and entire motor assembly should be replaced 8 Improper Voltage Input to Heater The ...

Page 17: ... page 23 OBSERVED FAULT Checking Fuse Fuse Ignitor Fuse Clips 2 Blown Fuse on Ignition Control Assembly Remove fuse cover and inspect fuse Check for continu ity with an ohmmeter If fuse is open replace with a fuse of the same type and rating GMA 10 3 Defective Ignition Control Assembly With motor and ignitor wires disconnected connect volt meter leads to the ignitor terminals Use the 0 to 200 V A ...

Page 18: ...ll TEST PROCEDURE 1 Defective Ignition control Remove pressure gauge plug from filter end cover Re move 4 side cover screws that attach the side cover to the heater Allow side cover with ignition control attached to rest on fuel tank flange Disconnect only the photocell wires from ignition control Attach the HA1170 leads to the photocell terminals on the ignition control Plug the power cord into a...

Page 19: ...he photocell is defective and should be replaced Block off the light source by putting thumb over opening of photocell Replace the photocell if a change in resis tance is not observed The resistance should measure greater than 50 000 OHMS use the 1 megohm scale on the meter 3 Bad Electrical Connection s or Wired Incorrectly Verify that all electrical connections are secure and mak ing electrical c...

Page 20: ... on page 6 for specified pressures It may be necessary to con nect the HA1170 tester in place of the photocell while adjusting the pressure due to the fast shutdown response of the control Note Pressure gauge must be scaled in 1 4 pound in crements for accurate measurement 6 Dirty Clogged Air Filters in Compressor Inspect and replace air intake air output and lint filter if necessary Filters shoul...

Page 21: ... Air Line Fitting Fuel Line Fitting 200 000 Btu Models 7 Check for Restricted Fuel Flow 35 000 to 165 000 Btu Models Remove air and fuel lines from nozzle adapter Remove nozzle adapter nozzle from bracket 200 000 Btu Model Remove ignitor do not strike or bend element from bracket Place in a safe location Remove air and fuel lines from nozzle adapter Remove two bracket screws and remove bracket noz...

Page 22: ...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 Drain fuel tank and rinse with clean fresh kerosene or No 1 fuel oil Refer to local city or county ordinances for proper disposal of fuel oil For replacement parts contact www PartsFor com ...

Page 23: ... 104040 01 02 104068 02 03 Kit Green Green Red Black Black Yellow 01 Gray 02 Yellow 01 Gray 02 Motor Ignitor Thermostat Photocell Photocell Ignitor Motor Return AC Neutral L2 120V L1 Ignitor Motor Power Plug 120V 60Hz Blue Photocell Photocell Ignitor Motor Return AC Neutral L2 AC Hot L1 Motor Ignitor Blue White White White White Photocell Ignition Control Assembly 104040 01 104068 02 Kit Green Gre...

Page 24: ...www desatech com For replacement parts contact www PartsFor com ...

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