Controls for Circulating pump

Old 05-28-14, 08:04 AM
Thread Starter
Join Date: Mar 2012
Posts: 8
Received 0 Votes on 0 Posts
Controls for Circulating pump

My circulating pump for room heat comes on when my boilermate calls for heat. The boilermate circ. pump comes on as well but now that summer is here I don't want my house getting hot. I have a Aquastat relay Honeywell "L8148A" and both low voltage wires (Thermostat house & boilermate) are hooked up to "TT" terminal. I also have a Honeywell "R845A" for a third circ. pump which is used only in the dead of winter. Right now I pull the wire off circ #1 terminal so the house won't heat up. I believe that the boiler was first set up for "cold start" boiler.
Old 05-28-14, 10:18 AM
Join Date: Feb 2014
Location: USA
Posts: 2,101
Received 0 Votes on 0 Posts
Is your stat just a heat only stat?
Old 06-03-14, 05:30 PM
Geochurchi's Avatar
Join Date: Nov 2012
Location: United States
Posts: 5,049
Received 91 Votes on 86 Posts
Looks like you will need another R845A relay to break the other zone off from the boilermate,wire it up just like the other R845A relay you use for extreme cold .

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: