Wiring – Honeywell L6006C Aquasta wiring to a Taco 006-BC4 Hot water Circulator Pump

aquastatcirculatorpumpwater-heaterwiring

I have a Taco 006-BC4 hot water circulator pump installed on a mechanical timer and its been working fine. However, I would like to install a Honeywell L6006C Aquastat to drive the pump so I could eliminate the timmer. The aquastat will only be working with the hot water circulator pump. It appears that I would only use 2 of the 3 terminal screws of the aquastat. I am looking for some help with the wiring of the aquastat to turn the pump on/off? Also, what would be considered typical high, low and differential temperature settings to start with? I greatly appreciate any help. Thanks!

Best Answer

I looked at the instruction manual for the switch, and it says:

Switching action is as follows: Upon a drop in boiler water temperature (to dial setting, less differential), makes R to B burner contact; breaks R to W contact, preventing circulator operation. Upon a rise in boiler water temperature (to dial setting), breaks R to B burner contact, makes R to W circulator contact.

Manual link

That said, I don't know much about how the circulator should work, and what temperatures to set, but if you want the pump to come on when the temperature drops, you would wire it to terminals R and B and if you need it to come on when the temp goes up, it would be terminals R and W. One is typically meany for heat (B) and the other for a circulator (W), but your installation might be different.

Related Topic