Question about Heating & Cooling
I have Grundfos ups15-58frc pumps on my several zones. Thermostat on one zone is OFF but the supply line for that zone still has heat so the zone is not closed off. No lights show on the TACO control for that zone so whats going on? Is there a manual OFF mode for the Grundfos?
If the circulator pump is not running It may be that another circulator pump is forcing boiler water through that zone when it runs,if so , you may have to install a zone valve to make sure the zone is completely closed off when not in use. Hope this helps.
Posted on Dec 31, 2013
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Posted on Jan 02, 2017
SOURCE: home heating and thermostat
It is possible the relay on the zone board is bad, You can test the thermostat if you own a voltage meter. It is possible for the thermostat to display and still be bad.
Posted on Mar 20, 2008
Hello. Each zone in you home has one thermostat controlling one zone valve. Generally, when a thermostat is calling for heat the zone valve opens and the circulating pump comes on to move the water around that loop. If your other two zones are both working as they should and you now have a new zone valve on the third loop I would suspect that the thermostat is faulty. Regards, Joe
Posted on Dec 12, 2009
Hi there, this mechanical t-stat you are using now, does it just open and close this zone valve on a call for heat to fire the burner also? What voltage is this thermostat, 24, 120, or even 220 volts? I need to no this so I can locate the stat you need to replace the old mechanical stat. Let me know exactly what all this stat controls, any fan, or just the burner and zone valve. I need to know the wiring configuration of the existing stat. This will make for a faster locating of the new stat. I can get you a stat that you can control just about any combination's of what ever and that's why I need to know voltages and amount of wires available to me to work with. This I thank you for. Contact me and I will get to you as soon as I am available today.
Posted on Jan 17, 2010
Testimonial: "thanks!! Everything went smooth & is working great"
SOURCE: I have a two zone
Good clues to work with--
Let's review how you wired up the Zone Valves, in relation to the Boiler Control panel...
You say the upper zone does NOT SHUT DOWN--
Does that mean it is OPEN ALL THE TIME?-- (even when the circulating pump is OFF? )
That sounds like the thermostat is not even in the circuit, then.
Have you been able to cycle each of the valves thru their cycles-- Open- and then closed?
-- It almost sounds like you have an interconnection between the two valves-- is this possible?
Each Thermostat has to control its valve only...
and most systems do this thru a control panel at the boiler--
So-- How is your control panel connected to the 2 thermostats, and how are the 2 zone valves connected to the Control board?
Are you following a wiring schematic for hooking the valves and thermostats to the control board?
There should be a schematic with the new valve you must installed, right?
did you wire it like the instructions showed?
Make a few more tests, and get back with us--
Posted on Jan 18, 2011
Testimonial: "well I am sure it was wired in wrong... when the service guy came back he talked me into putting on a different circuit board.. the zone valves wired "
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