aquastat questions

[jessem]

What I currently have: is a high temp aquastat to excite forced air fans
when wood boiler water temp (160*)drops below the current setting.

What I want: is a aquastat(s) to excite the heat pump compressor when the
water temp is too low (110*) when fire is left unattended. Also I would
like to switch off the (2) forced air fans at the OWB when the heat pump is excited.

I already have a new strap on honeywell aquastat, and I am not an electrician so simplicity is nice

thanks

 

[jebatty]

What I currently have: is a high temp aquastat to excite forced air fans
when wood boiler water temp (160*)drops below the current setting.

What I want: is a aquastat(s) to excite the heat pump compressor when the
water temp is too low (110*) when fire is left unattended. Also I would
like to switch off the (2) forced air fans at the OWB when the heat pump is excited.

I already have a new strap on honeywell aquastat, and I am not an electrician so simplicity is nice

thanks

One way to do this would be two SPDT aquastats wired in series. #1 would be set at 110F. Below this point the NC contact would excite the heat pump, at 110F the NO contact closes and sends power to the NC contact on #2 which excites the forced air fans. At 160F #2 closes and excites the NO contact to receive heat from the wood boiler. I think I got this right.

 

[jessem]

Maybe it would be better for one aquastat for the heat pump and another on the return water line near the stove, wired seperate for the forced aor fans? Any thoughts on this?

thanks

One way to do this would be two SPDT aquastats wired in series. #1 would be set at 110F. Below this point the NC contact would excite the heat pump, at 110F the NO contact closes and sends power to the NC contact on #2 which excites the forced air fans. At 160F #2 closes and excites the NO contact to receive heat from the wood boiler. I think I got this right.