Zone 1 thermostat not triggering heat

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Heisey
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Post by Heisey » Sun. Nov. 07, 2021 8:20 pm

Greetings! I have an EFM 520 with three zones (zone 1 - 1st floor / zone 2 - 2nd floor / zone 3 - basement). My zone 1 thermostat is not triggering the stove to turn on. The other thermostats are working fine and the stove is running as it normally would.

The thermostat in zone 1 is a Sensi smart thermostat. I can hear it "click" on when I adjust it to make the furnance turn on. It just isn't making the stove cycle.

Some additional information. I do turn the system off during the summer. I recently just turned it back on. I have been doing this process for years and this is the 1st complication I have noticed.

 
Heisey
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Post by Heisey » Sun. Nov. 07, 2021 9:21 pm

I drained some water from Zone 1. That seemed to do the trick. I'll know for sure tomorrow

 
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2001Sierra
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Post by 2001Sierra » Sun. Nov. 07, 2021 9:37 pm

Heisey wrote:
Sun. Nov. 07, 2021 9:21 pm
I drained some water from Zone 1. That seemed to do the trick. I'll know for sure tomorrow
Not sure why draining water from a zone should matter. Now if you have air in that zone that is a different story. Did you get air with the water? The air scoop might get the rest of the air out of that zone if this is the case. There also should be a air bleeder on your air scoop.


 
ziggy87
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Post by ziggy87 » Sun. Nov. 07, 2021 10:26 pm

Sounds like there is a possibility that it was air bound. Draining water from the system would help that. Hope that it stays running for you. What kind of zone control board are you running?

 
Heisey
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Post by Heisey » Thu. Nov. 11, 2021 8:28 pm

2001Sierra wrote:
Sun. Nov. 07, 2021 9:37 pm
Not sure why draining water from a zone should matter. Now if you have air in that zone that is a different story. Did you get air with the water? The air scoop might get the rest of the air out of that zone if this is the case. There also should be a air bleeder on your air scoop.
I think it occurred when I had the system shut down for the summer months. Things are running great since draining some water. I believe that got the air out of the line.

 
Heisey
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Post by Heisey » Thu. Nov. 11, 2021 8:29 pm

ziggy87 wrote:
Sun. Nov. 07, 2021 10:26 pm
Sounds like there is a possibility that it was air bound. Draining water from the system would help that. Hope that it stays running for you. What kind of zone control board are you running?
Things are running great like it normally does. I'm not sure what you mean by a control board. My zones are Taco brand.


 
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2001Sierra
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Post by 2001Sierra » Thu. Nov. 11, 2021 9:29 pm

Zone board I am assuming is Taco Panel which the thermostats and circulators feed to to determine which zone needs heat.

 
ziggy87
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Post by ziggy87 » Thu. Nov. 11, 2021 11:05 pm

Is there there a zone control that controls the zones? Are you using just pumps or pump and zone valves?

 
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Richard S.
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Post by Richard S. » Fri. Nov. 12, 2021 6:30 am

Heisey wrote:
Thu. Nov. 11, 2021 8:28 pm
I believe that got the air out of the line.
You shouldn't really have air in the lines. If you hear a lot of gurgling as water is circulated you have a lot of air. There should be little or no gurgling. Minimally there should be automatic air bleeders in strategic locations e.g. high point of the system. For example you might have elbow before/after it enters baseboard and you will have one of these on top:

https://www.lowes.com/pd/Durst-Air-Eliminator/345 ... lsrc=aw.ds

The valve cap on the top should be slightly open. It will automatically purge the air as it's collected.

You might also have one these somewhere on the system with the air bleeder on top.

https://www.lowes.com/pd/Taco-Radiant-Heating-1-i ... 1000182435

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