Controling an 8Kw electric heater

K

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Ken

The heater is a Federal Pacific Electric Co 8Kw ceiling mount heater with a fan. It is 220v single phase. I bought it yesterday for $40.00. It has never been used. It has a relay inside for the line voltage to heater elements. I traced the wiring last night but forgot to bring with me today. I can't figure how to wire a thermostat. There is no low voltage control. There is an orange wire from the relay coil that is connected to the line voltage and the other side of coil is the other line voltage. The fan wiring looks like it goes through thermal switches to keep fan off when not hot. I believe the orange coil wire is also on some sort of thermal switch to shut off heat if too hot. I think I can put a thermostat in series with the orange wire.
 
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