EWP Digital Electronic Controller (part #8020) is suitable for use with EWP80 - Electric Water Pump - part # 8005 OR EWP110 - Electric Water Pump - part # 8015.


In each case the controller electronically senses coolant temperature and adjusts the voltage to the pump, and thereby, the EWP coolant flow. The algorithm in each controller has 3 distinctive phases of operation:


1. No Output -Up until coolant temperature approx. 20 degC below that 'set', the controller provides no voltage to the pump therefore does not operate.
2. Pulsing - Between 20 and 5 degC below 'set' temperature, the controller provides a 'pulse' signal of around 4~5 volts OFF and ON every few seconds to provide a very small flow ro remove any hot-spots in the engine (ie around valves etc).
3. Pump-On - From 5 degC and above the 'set' temperature, the voltage output from the controller rises linearly with temperature until the pump is at full capacity. The controller will 'lock-on' to the 'set' temperature and control the pump accordingly.



Specifications

Input Voltage: 12V DC to 13.5V DC
Output Voltage: 5V to 13.5V
Max. Current: 12 amps
Operating Temperature: -20