Desa BTU/HR Ment, Dirty fuel filter, Obstruction in nozzle, Water in fuel tank, And/or lint filter

Page 8

TROUBLESHOOTING

Continued

FAULT CONDITION

POSSIBLE CAUSE

REMEDY

Motor starts and runs but heater

1. No fuel in tank

1.

Fill tank with kerosene

does not ignite

2.

Pump pressure incorrect

2.

See Pump Pressure Adjust-

 

 

 

 

ment, page 10

 

3.

Dirty fuel filter

3.

See Fuel Filter, page 10

 

4.

Obstruction in nozzle

4.

See Nozzle Assembly, page 13

 

5.

Water in fuel tank

5.

Drain and flush fuel tank with

 

 

 

 

clean kerosene. See Storing,

 

 

 

 

Transporting, or Shipping,

 

 

 

 

page 6

WARNING: High voltage!

6.Bad electrical connection be- tween ignitor and ignition con- trol assembly

7.Defective ignitor

8.Defective ignition control as- sembly

9.200 Model Only: Defective fuel valve (Models equipped with fuel valve only)

6.Check electrical connections. See Wiring Diagrams, page 16

7.Replace ignitor, see page 11

8.Replace ignition control as- sembly

9.See Fuel Valve, page 11

Heater ignites but ignition con-

1. Pump pressure incorrect

1.

See Pump Pressure Adjust-

trol assembly shuts heater off

 

 

 

ment, page 10

after a short period of time

2. Dirty air intake, air output,

2.

See Air Output, Air Intake, and

 

 

and/or lint filter

 

Lint Filters, page 9

 

3.

Dirty fuel filter

3.

See Fuel Filter, page 10

 

4.

Obstruction in nozzle

4.

See Nozzle Assembly, page 13

 

5. Photocell assembly not properly

5.

Make sure photocell boot is

 

 

installed (not seeing the flame)

 

properly seated in bracket

 

6.

Dirty photocell lens

6.

Clean photocell lens

WARNING: High voltage!

7.Bad electrical connection be- tween photocell and ignition control assembly

8.Defective photocell

9.Defective ignition control as- sembly

7.Check electrical connections. See Wiring Diagrams, page 16

8.Replace photocell

9.Replace ignition control as- sembly

8

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Contents Table of Contents Safety Information Never attach heater to external fuel tank UnpackingProduct Identification Theory of Operation FuelsVentilation Assembly OperationFor 110/115/155/165/200 Models only To Start HeaterWthout ON/OFF Switch Operation with Portable GeneratorStoring TRANSPORTING, or Shipping To Restart HeaterPreventative Maintenance Schedule TroubleshootingFault Condition Possible Cause Remedy How Often How ToMent, Dirty fuel filterObstruction in nozzle Water in fuel tankService Procedures Upper Shell RemovalAIR OUTPUT, AIR Intake and Lint Filters FANReplace filter end cover Pump Pressure AdjustmentFuel Filter Replace combustion chamber Carefully remove replacement ignitor from packingIgnitor For 40/50/55/60/70/110/115/155/165 Models Only Nozzle AssemblyPlace plastic hex-body into vise and lightly tighten Fuel and AIR Line Replacement and Proper Routing For 200 Model OnlyProcedure if Rotor is Binding Pump RotorSpecifications Ignition Control AssemblyModel Size 110/115 155 165 200Wiring Diagrams Ignition Control AssemblyWiring Diagrams Illustrated Parts Breakdown Standard ModelR40, REM40, PK40, UK40, TK40, N40 Thermostat ModelsParts List ModelsStandard Model 50/55/60/70 Models NTC-4CStandard Models 110/115/155/165 Models WLE-2R200B, PK200, UK200, TK200 RM200BT, B200BT, PK200T, UK200T, TK200T, REM200BT, R200BTSee Burner Head Assembly for 110/115/155/165 Models NOZZLE/BURNER Head Assembly for 200 ModelsMotor and Pump Assembly for 40/50/55/60/70 Models FHPF3-5CMotor and Pump Assembly for 110/115/155/165 Models FHPF3-5CMotor and Pump Assembly for 200 Models Replacement Parts Wheels and Handle Parts ListParts Under Warranty Parts not Under WarrantyTechnical Service AccessoriesWarranty and Repair Service Limited Warranty

BTU/HR specifications

Desa BTU/HR is an innovative energy solution that emphasizes efficiency and sustainability in thermal energy generation. Designed with the modern consumer in mind, the Desa BTU/HR platform integrates advanced technologies to optimize heating systems for both residential and commercial applications.

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