Aquastat Wiring Diagram Old. One time purchase subscribe save. The aquastat is only a couple months old also.
Furthermore this thermostat wiring diagram is specifically for a system with two transformers. Viessmann develops intelligent and sustainable energy systems for residential and commercial buildings. A hot water boiler is controlled by an aquastat which cycles the boiler on and off based on the boiler temperature.
You would not want to hook the 220 volts up to the two speed wires or it could burn the motor up.
I moved to a house that has bernham boiler 22152378 serial number. One time purchase subscribe save. If you have a two stage heat pump then you will also utilize terminal y2 for the second stage. A hot water boiler is controlled by an aquastat which cycles the boiler on and off based on the boiler temperature.