If you have a cold start oil boiler then there is no need to heat that boiler with the wood boiler, this means a primary loop from the heat exchanger out to your zones and back to the heat exchanger,that circ runs constant, your zone circs will pull from that loop and your oil boiler will dump into the primary loop when needed but the oil boiler stays at ambiant temp until it is actually needed. when the wood boiler goes out the oil boiler will fire on a call for heat and when the setpoint temp is reached C-1 will activate the circ on the oil boiler and dump its heat into the primary loop, if you or your guy has any questions PM me and we can exchange phone numbers I will explain.