How do I wire one thermostat to run two circulators
How do I wire one thermostat to run two circulators on my 3 zone Weil/McClain hot water oil burner?
I have a separate hot water heater with its own circulator. My house has three floors and 3 separate circulators (zones). The second floor is 30 feet by 50 feet. The third floor is a loft that is 30 feet by 20 feet which over looks and is open to the second floor below on two sides.
The problem is the loft thermostat rarely calls for heat because the second floor heat rises & satisfies the third floor (loft) thermostat. This causes the heat pipes to freeze in adverse weather conditions because the water in the heat pipes located in unheated areas is cold.
I have tried raising the loft thermostat and lowering the second floor thermostat and using three ceiling fans to move air around. Nothing seems to work without constant attention.
Right now I have shut down the loft (3rd floor) thermostat to avoid frozen pipes. However the second floor baseboard does not have enough output to heat the volume of space. I have 21 foot ceilings. The footprint is 30ftx50ftx21 feet high ceilings and two walls are 90 percent glass.
I am thinking the answer is to put the third floor (loft) thermostat (circulator) and the second floor thermostat (circulator) to operate on the second floor thermostat only.
Can this be done by wiring or do I have to do some cooper repiping?
Thank you for your help.
Sincerely
Jay