Hello. I bought at auction a 480 volt, 3 phase shop heater and I am trying to figure out if i can use it in my garage where I have a 220 dryer outlet. I found under the access panel a wiring diagram with instructions for changing from 3 phase to 1 phase. Does that simply
double the voltage? It seems easy enough, but what is field wiring that attached to L1 and L2? Attached is my info. Thanks 4 the help!

 

It is still designed for 480v, including the fan and contactor coil.
Max.

 

If you modified the fan motor and contactor coil to run from 220V and connected the heating coils to the 220V single-phase, the output heat would be reduced to about 21% of its output at 480V or 3.15kW.

You could also buy an old, used 220V clothes dryer and run the vent outlet into the room for heat.

 

Thanks guys. I think I'll just pass on my bargain to someone else. Thanks for the old dryer suggestion. That's probably all I really need.