I have NEVER seen such an animal.. If you want to have the heater controlled with a P-chain, a regular one would have to be wired into the control circuit if one exists within the heater ( providing the P-Chain's voltage rating matches or exceeds the control circuit voltage).. A unit that big would most likely have a contactor that controls the heater and the contactor coil will be driven from a circuit that contains all the control / safety devices..
Are these patio heaters 208 single phase or are they 3-phase?...

Just curious..
A.D

[This message has been edited by Rewired (edited 02-22-2006).]