Diesel Fuel Heater

[buzzp]

I have recently started with a company that makes industrial vehicles and we use a lot of diesel fired heaters for heating material. The heaters I am referring to are a compact unit with circulating pump, heat exchanger, etc in one package. The only kind I can find has a fixed temperature for on and off temperatures. We need to be able to change the temperature that the furnace comes on at. It is easy to fool the heater by placing the proper resistor where the RTD sensor is. This will give us a fixed temperature that is less than the temperature the furnace comes on at. This works fine. My problem is, I am not in favor of modifying the manufacturers electronics, although they have done it here for quite some time. Are there any heaters available that have a user adjustable on/off temp? Or are there some that have a switched contact to tell the heater when to come on AND only use the temp sensor for safety shutdown when things get to hot? Thanks for any help.

 

[newdawn]

Check this company out.

http://www.polarn-innovation.se

They build there stuff on Eberspacher (Espar in US i think)
diesel heater and they can be temprature controlled.

Best Regards
/Per

 

[buzzp]

Thanks, I will check them out.