Desa BTU/HR owner manual Pump Pressure Adjustment, Fuel Filter, Replace filter end cover

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SERVICE PROCEDURES

Continued

6.Replace filter end cover.

7.Replace fan guard and upper shell. IMPORTANT: Do not oil filters.

Air Intake Filter

Filter End

Cover

Lint Filter

Air Output Filter

Figure 15 - Air Output, Air Intake, and Lint Filters, 110/115/155/165/200 Models Only

PUMP PRESSURE ADJUSTMENT

1.Remove pressure gauge plug from filter end cover (see Figure 16).

2.Install accessory pressure gauge (part num- ber HA1180).

3.Start heater (see Operation, page 5). Allow motor to reach full speed.

4.Adjust pressure. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease pressure. See specifications correct pressure for each model (see Figure 17).

5.Remove pressure gauge. Replace pressure gauge plug in filter end cover.

FUEL FILTER

1.Remove side cover screws using 5/16" nut- driver.

2.Remove side cover.

3.Pull upper fuel line off fuel filter neck (see Figure 18 or 19).

4.Carefully pry bushing, fuel filter, and lower fuel line (110/115/155/165/200 Models only) out of fuel tank (see Figure 19).

5.Wash fuel filter with clean fuel and replace in tank.

6.Attach upper fuel line to fuel filter neck.

7.Replace side cover.

Fuel Filter and

Upper Fuel Line

Bushing

Side Cover

Figure 18 - Fuel Filter Removal,

40/50/55/60/70 Models

Fuel Filter, Bushing,

and Lower Fuel Line

Pressure

Gauge

Plug

Relief Valve

Side

Cover

Figure 16 - Pressure Gauge Plug

Removal (40/55/60/70 Models Shown)

 

Pump

 

Model

Pressure

 

40

3.0 PSI

Pressure

50

3.4 PSI

Gauge

55

3.4 PSI

60

3.4 PSI

 

70

4.7 PSI

 

110

5.1 PSI

 

115

5.1 PSI

 

1555.2 PSI

1655.6 PSI

2006.2 PSI

Figure 17 - Adjusting Pump Pressure

(40/50/55/60/70 Models Shown)

Upper Fuel Line

Figure 19 - Fuel Filter Removal,

110/115/155/165/200 Models

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113282-01C

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Contents Table of Contents Safety Information Product Identification UnpackingNever attach heater to external fuel tank Ventilation FuelsTheory of Operation For 110/115/155/165/200 Models only AssemblyOperation To Start HeaterStoring TRANSPORTING, or Shipping Wthout ON/OFF SwitchOperation with Portable Generator To Restart HeaterFault Condition Possible Cause Remedy Preventative Maintenance ScheduleTroubleshooting How Often How ToObstruction in nozzle Ment,Dirty fuel filter Water in fuel tankAIR OUTPUT, AIR Intake and Lint Filters Service ProceduresUpper Shell Removal FANFuel Filter Pump Pressure AdjustmentReplace filter end cover Ignitor Carefully remove replacement ignitor from packingReplace combustion chamber Place plastic hex-body into vise and lightly tighten Nozzle AssemblyFor 40/50/55/60/70/110/115/155/165 Models Only Fuel and AIR Line Replacement and Proper Routing For 200 Model OnlyProcedure if Rotor is Binding Pump RotorModel Size SpecificationsIgnition Control Assembly 110/115 155 165 200Wiring Diagrams Ignition Control AssemblyWiring Diagrams R40, REM40, PK40, UK40, TK40, N40 Illustrated Parts BreakdownStandard Model 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 Parts Under Warranty Replacement PartsWheels and Handle Parts List 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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