[Equest-users] App G model VAV w unmet loads in heating

R B slv3sat at gmail.com
Tue Jul 30 08:39:37 PDT 2013


I looked at your file. When I get these types of unmet errors, the first
thing I do is set the max flow for heating (under the fan flow parameters)
to 1 or whatever ratio is allowed - I think the eQuest default is 0.5,
which probably is too less for cold climates. If this does not help, I
normally look at the min flow (reducing it if possible helps). Other is to
look at the zone design cfm - usually reducing it helps - but reducing it
too much results in cooling hours unmet. For LEED I try to get each zone
unmet below 50 -so start with the highest unmet zone. Sometimes I end up
with a combination of all the above.
Hope this helps.
-Rohini


On Tue, Jul 30, 2013 at 8:31 AM, Matthew Baron
<mbaron at wendelcompanies.com>wrote:

>  Yes I have a zone heat source set to my hot water loop and a 50 degree
> delta for the reheat coil.****
>
> ** **
>
> Thanks,****
>
> Matthew J. Baron****
>
> [image: wendel EM]
>
> Wendel, 140 John James Audubon Pkwy, Suite 201, Buffalo, NY 14228
> *p* 716.688.0766   *f* 716.625.6825   *e* mbaron at wendelcompanies. com   *w
> ** *wendelcompanies. com
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> *From:* R B [mailto:slv3sat at gmail.com]
> *Sent:* Tuesday, July 30, 2013 9:16 AM
> *To:* Matthew Baron
> *Subject:* Re: [Equest-users] App G model VAV w unmet loads in heating****
>
> ** **
>
> Do you have a reheat delta t and zone heating coils installed (both in the
> system tab). Sorry, havn't looked at your files.****
>
> -Rohini****
>
> ** **
>
> On Tue, Jul 30, 2013 at 8:03 AM, Matthew Baron <mbaron at wendelcompanies.com>
> wrote:****
>
> HI,****
>
> I am working on several school models and they generally fall into the
> packaged vav with reheat category. The spaces are fine for cooling, but are
> way off for heating. When I look at the ss-p report the heating capacity
> for the units shown to be zero, when I look at the ss-a report it indicates
> the heating load. I have entered the hot deck temp, zone entering temp, a
> preheat coil. Any suggestions would be appreciated.****
>
>  ****
>
> Thanks,****
>
> Matthew J. Baron****
>
>
>
> Wendel, 140 John James Audubon Pkwy, Suite 201, Buffalo, NY 14228
> *p* 716.688.0766   *f* 716.625.6825   *e* mbaron at wendelcompanies. com   *w
> ** *wendelcompanies. com
>
> ARCHITECTURE    ENGINEERING    PLANNING    ENERGY SERVICES    CONSTRUCTION
> MANAGEMENT
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