Variable Speed Retrofit Packages with Di Fan Drive Controller for Heavy-Duty Trucks
Horton’s Modulator Retrofit Package with a Di Fan Drive Controller ensures continuously variable, precise fan speed when paired with the heavy-duty truck ECM, engine sensor and other vehicle status signals. Engine and coolant temperature, AC status and other cooling command digital messages are broadcast by the ECM over the vehicle CANbus. Using these messages and Modulator fan-speed feedback, the Di closed loop controller calculates control signals that manage the fan to speeds appropriate for vehicle and engine operating conditions.
Everything needed for plug and play installation is engineered into the retrofit installation kits. See the product selection table for details. Horton’s Modulator Retrofit Package for Heavy Duty Trucks with ECM Control contains:
• Modulator RCV250 Fan Drive assembly—Modulator Fan Drive, mounting bracket and pulley
• Retrofit installation kit—step-by-step installation manual, Di Fan Drive Controller and Di wiring harness and
• WindMaster® HS11 Fan