Desa Tech HEATERS OWNER'S MANUAL owner manual Pump Procedure if Pump is Binding, Fuel Lines

Page 13

SERVICE PROCEDURES

Continued

PUMP (Procedure if Pump is Binding)

1.Remove upper shell (see Upper Shell Re- moval, page 11).

2.Loosen hex screw on ﬂange clamp at rear of motor with 5/16" nut-driver (see Figure 13).

3.Turn fan with hand (see Figure 14).

4.If fan turns freely, tighten screw on ﬂange clamp.

5.If fan does not turn freely, replace pump.

6.Replace upper shell.

Hex Screw

On Flange

Clamp

Figure 13 - Location of Screw on Flange Clamp

FUEL LINES

(Procedure for Tightening Fuel Lines)

1.Remove upper shell (see Upper Shell Re- moval, page 11).

2.Use an adjustable wrench as a backup on ﬁttings.

3.Use 7/16" wrench and tighten fuel lines at solenoid valve, pump and fuel ﬁlter canister (if equipped) (see Figures 15 and 16).

Burner Head

Fuel

Line

Solenoid

Valve

Figure 15 - Fuel Line at Solenoid Valve

Fuel

Pump

Fuel

Lines

Figure 16 - Fuel Lines at Pump

Figure 14 - Turning Fan with Hand

110098-01G

www.desatech.com

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Contents Table of Contents Follow all local ordinances and codes when using heater Safety InformationUnpacking Product IdentificationFuels Theory of OperationFresh Air Opening Requirements To Start Heater OperationTo Stop Heater To Restart HeaterPortable Generator STORING, Transporting of ShippingHow Often How To Preventative Maintenance ScheduleObserved Problem Possible Cause Remedy TroubleshootingDamaged electronic ignitor Pump Pressure Adjustment Upper Shell Removal Service ProceduresSpark Plug FAN Blades and AIR DeflectorsAdjusting Pump Pressure Fuel Lines Pump Procedure if Pump is BindingTank Fuel Filter Fuel FiltersFor Heaters With Fuel Filter/Canister External To Pump For Heaters With Fuel Filter Internal To PumpTechnical Service Maintenance KitsAccessory Replacement PartsModels B350D, SB350D and R350A Illustrated Parts BreakdownNTC-4C Parts ListModels B600D, SB600D and R600A NTC-4C Burner Head Assembly 350,000 and 600,000 BTU/HR Illustrated Parts Breakdown and Parts ListNPF-5C For Heaters With Fuel Filter/Canister External To Pump Motor and Pump Assembly 350,000 and 600,000 BTU/HRWiring Diagram Specifications350,000 Btu/Hr Warranty Service Warranty and Repair Services

Tech HEATERS OWNER'S MANUAL specifications

Desa Tech heaters are renowned for their advanced heating solutions that combine efficiency, safety, and user-friendly features. This owner’s manual serves as a comprehensive guide to the main features, technologies, and characteristics of Desa Tech heaters, ensuring users can maximize their heating experience while maintaining optimal safety and performance.

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