Hi Folks, Question for you boiler guys. I have a Burnam V90 boiler in my house that uses a Honeywell triple aquastat for control. The system is a 2 zone system with 2 zone valves and 1 circulator pump. Considering fuel oil prices around $3.50 a gallon, I have the system shut down most of the time, I heat the house primarily with a wood pellet stove. In very cold weather the pellet stove struggles to keep up, (or if the pellet stove conks out) it would be handy to have the boiler stepping in to help out. Here's my question, the system is currently wired so the aquastat maintains the boiler temp at all times. When the thermostat(s) call for heat, the required zone valve opens and the circulator pump kicks on, as cold water returns to the boiler the aquastat responds kicking the burner on to maintain the boiler temp. All is well except that it may be a week or more at a time between the extra "help" is required, during this time with the boiler temp being maintained it burns 1 to 2 gallons of fuel a day. Can someone post a wiring diagram that I can change the wiring so when one of the zones is not calling for heat the boiler goes cold? In otherwords when a t-stat calls for heat the zone valve opens, the circulator runs and the burner fires for the duration of the demand until the t-stat is satisfied (or the aquastat is satisfied) then the burner shuts down until the next time one of the t-stats calls for heat. Kinda'-sorta' like forced hot air works.
Thanks for your help!
Thanks for your help!