[Equest-users] baseboards activating when zone is already above heat setpoint?

David Eldridge DEldridge at grummanbutkus.com
Thu Aug 27 10:25:14 PDT 2020


The zone temp is after the net effect of the systems so it may be in range because the baseboards ran - is there an airside system that could have overcooled?

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773.490.5038

On Aug 27, 2020, at 12:16 PM, Matthew Yarmon via Equest-users <equest-users at lists.onebuilding.org> wrote:


Hi all,

I hope you're able to see the image below. If not, I uploaded it here: https://imgur.com/a/WpQ8FSR   It shows eQuest 'hourly results', specifically it shows a warm day in the year, July 3rd, for a model I'm looking at.

In my model, from 1pm-4pm on July 3rd, the heating setpoint is 71 °F (grey column), cooling setpoint is 76 °F (blue).  Outdoor temp is ~84 °F (orange), zone temps are ~75-77 °F.  The question is, why are my baseboards (yellow column) activating and heating the zone?  The temp in the zone is above the heating setpoint, so the baseboards should not be turning on.

The baseboards are set to 'thermostatic' control.  I've been unable to set  baseboard schedule (see 2nd screenshot below - if anyone has a suggestion for this problem, I'd love to hear it).  But regardless of the schedule, if the zone heat setpoint is 71 °F, and zone temp is above 74 °F, why are baseboards turning on?

Cheers,
Matthew
<image.png>

<image.png>

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