wiring zone valves and taco sr501
#1
11-16-09, 02:43 PM
wiring zone valves and taco sr501
Hi, I have added a third zone off of my current boiler. The third zone is radiant in my basement. I added a third zone valve (Honeywell V8043) and taco 501 controller with second circulator. zone valaves all work fine, but trouble with the 501 either always being on or not working even with 24 volts there. I have posted the diagrams here:
http://66.132.176.32/index2.html
Help please!!
http://66.132.176.32/index2.html
Help please!!
#2
11-16-09, 04:09 PM
The thermostat would be wired as normal but the zone valve end switch should be wired to the SR501 terminals R&W and not daisy chained to the other zone valves. The way you are showing it the SR501 has a 24v power supply and you are attached into the 24V side of the other transformer twice. All else stays the same.
See revised drawing
Radiant wiring picture by rbeck1953 - Photobucket
See revised drawing
Radiant wiring picture by rbeck1953 - Photobucket
Last edited by rbeck; 11-16-09 at 04:29 PM.
#3
11-16-09, 04:45 PM
For the 'visual thinkers' among us, this is what rbeck is describing:
Sequence of operation:
T'stat opens zone valve, when valve opens, endswitch operates and triggers 501 to turn on pump and fire boiler.
Sequence of operation:
T'stat opens zone valve, when valve opens, endswitch operates and triggers 501 to turn on pump and fire boiler.
