Water temps for hydro-air

Dave_61

Hello,

We have a Hydroair system with a gas-fired boiler and a buffer tank. The buffer tank has its own aquastat and is the only device that can cause the boiler to turn on. Currently, I have it set for 170 degrees for the hydroair system.

The boiler has a high fire burner and an operating burner. I have the high fire set to only operate when the outdoor temps are below 20 degrees and have had no problems over the previous 2 winters.

I have the operating water temp for the boiler set at 180 degrees and the high fire set at 160. So high fire burner will only come on if inlet water temp in boiler is less than 160 (and outdoor temp is less than 20), and boiler turns off at 180 degrees. Buffer tank stops calling for heat at 170 degrees.

I am trying to make the system as economical as possible while balancing comfort. Does anyone have advice as to what would be good numbers for each parameter?



Thanks

Dave