Voltage: 24 Volts (Strictly for 24V electrical systems; not compatible with 12V models).

Heater Models: * Hydronic D5WS: Remote-mounted pump version.

• Hydronic D5WSC: Compact version with the pump usually mounted near or on the unit.

Common Applications:

• Heavy-Duty Trucks: Volvo, MAN, Scania, DAF, Mercedes-Benz (Actros/Axor).

• Construction Machinery: Excavators, loaders, and cranes (CAT, Komatsu, Liebherr).

• Maritime: Yachts and commercial vessels using 24V DC systems.

• Buses: Coach and transit buses.

 Dual Function: It acts as both a transport pump (moving fuel from the tank to the heater) and a metering device (controlling exactly how much fuel enters the combustion chamber).

Pulse-Driven: The heater’s Electronic Control Unit (ECU) controls the pump. By increasing or decreasing the speed of the "clicks," the heater adjusts its temperature output.

Internal Filter: Most original models contain a tiny, serviceable metal mesh strainer at the inlet side to prevent debris from clogging the internal piston.

Compatibility: It is specifically calibrated for the 24V electrical systems found in heavy trucks and machinery. Using a 12V pump on a 24V system (or vice versa) will cause the heater to malfunction or damage the ECU.

• Code 047: Short circuit or interruption to the fuel pump.
• Code 052: Safety time exceeded (no flame detected due to lack of fuel).