[Equest-users] Heating is not on for System Type Pkgd Var Vol, and 4380 under heated hours

[Michael Busman]

Jing,

It's been a while but I'm remembering back to my days using VisualDOE.  You
might want to check how your thermostat is defined.  To get heating to
simulate properly with a VAV system, the thermostat needs to be defined as
reverse acting.  Take a look at this.

My best,

Mike Busman CEM
Retired Senior Energy Engineer

On Tue, Nov 13, 2018 at 1:32 PM Daric Adair via Equest-users <
equest-users at lists.onebuilding.org> wrote:

> Jing;
>
>
>
> First thing that jumps out at me is that there is no Heating Discharge Air
> Tempertaures or Reheat Temperatures set on the System>Heating Tab (last
> image you shared). For a VAV System I’d expect these values to be something
> like: Zone Max Temp: 90F Hot Deck Max Leaving Temperature 60F and Reheat
> Delta T: 35F.
>
>
>
>
>
> Thanks,
>
> *DARIC R ADAIR* PE, CEM, BEMP
> Mechanical Engineer, Energy Analyst
>
> *Henderson Engineers*
> daric.adair at hendersonengineers.com
>
> *Licensed in* KS
>
>
>
> *From:* Jing Hong <hongjing.shirley at gmail.com>
> *Sent:* Tuesday, November 13, 2018 3:16 PM
> *To:* equest-users at lists.onebuilding.org; equest-users at onebuilding.org
> *Subject:* [Equest-users] Heating is not on for System Type Pkgd Var Vol,
> and 4380 under heated hours
>
>
>
> Dear All,
>
>
>
> My model is located in Mexico and three zones are equipped with VFD. So I
> selected Pkgd Var Vol + Heat pump for these three zones and set the system
> up by the design cooling and heating capabilities. Currently, the SS-R
> shows 4380 under heated hours for each of the zones. And no space heat is
> provided for any of the zones. Does anyone know the possible reasons for
> this phenomenon?
>
>  I've done several solutions by searching:
>
> - Increased Throttling Range
>
> - Night Cycle Control --> Set to "Cycle on Any"
>
>  - Fan Control and Placement - Set to" Hourly Report Schedule"
>
>
>
> [image: image.png]
>
> [image: image.png]
>
> [image: image.png]
>
> [image: image.png]
>
> [image: image.png]
>
> Thank you!
>
>
>
> Jing
>
>
>
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