Taco 4 zone circulator control

Tom Manton

I'm having an issue with my 4 zone circulator controler. The system is an atmospheric wood boiler primary loop  feeding a 40 plate heat exchanger with a single speed circulator. The secondary loop is running 2 Grundfos alphas through 5 grundfos zone valves, 4 radiant loops,and an indirect water heater.

I'm trying to trigger the primary circulator by switching zone 1 in the controler through the end switch position. On a call for heat everything switches as it should, the problem occurs when all zones are satisfied the secondary loop shuts down but the primary remains on. I have wired from the zone1 low volt supply to the end switch. If anyone can show me where I went wrong thanks in advance.

kcopp

You need...

a sep. sr 501 just for the primary loop. then all the others w/ a sep. controller. ...(i think) Do you have a drawing?

Tom Manton

501

Thanks, that's what I was thinking too. My system is set up like that,

Tim_D

Give Me A Call

Hey Tom, Tim D. Here give me a call and we can work through it. 401-369-0646 is my cell or 401-942-8000 ext 396 is my office line.