[Bldg-sim] Supply temperature reset in ASHRAE baseline

[Kevin Kyte]

I am still not understanding.  Do you set cool control to "reset" or to
"warmest"?  If it is set to "reset", then the supply air temperature is in
relation to the outdoor temperature and that is not G3.1.3.12.  If it is set
to "warmest" there is not an option to enter a cool reset schedule because
it is grey'd out.  There is, however, a max and min cooling reset temp and a
minimum reset flow.  You also have your min heating reset temp opened up.  I
originally did this point by making cool control range equal to 10 because
it sounds good in the help file although this is in reference to the cooling
coil.  Silly me.

Kevin Kyte, LEED AP
RobsonWoese, Inc.
(T) 716-636-1800
(F) 716-636-1856
http://robsonwoese.com


-----Original Message-----
From: yizhao1 at vt.edu [mailto:yizhao1 at vt.edu] 
Sent: Friday, February 29, 2008 12:53 PM
To: Kevin Kyte
Subject: RE: [Bldg-sim] Supply temperature reset in ASHRAE baseline

I set in the same way but set the cool control to "reset" and referece high
and
low outdoor temp set points.

Quoting Kevin Kyte <kkyte at robsonwoese.com>:

> Ok, perhaps I haven't set done that right.  I have cool-control on warmest
> with airflow first.  The max and min cooling reset temp represent a 10
> degree difference.  The min being the temperature that is the 20 degree
> difference supply-air to room-air temp of 55.  Is this in fact not right,
> should it be cool-control set to reset?  Do we use a reset-temp or
> reset-ratio?  And should we be referencing high and low outdoor
temperature
> setpoints for this?  This is definitely an issue for me right now because
it
> represents a swing in energy cost savings of two points.
>
> Kevin Kyte, LEED AP
> RobsonWoese, Inc.
> (T) 716-636-1800
> (F) 716-636-1856
> http://robsonwoese.com
>
>
> -----Original Message-----
> From: yizhao1 at vt.edu [mailto:yizhao1 at vt.edu]
> Sent: Friday, February 29, 2008 12:15 PM
> To: Kevin Kyte
> Subject: RE: [Bldg-sim] Supply temperature reset in ASHRAE baseline
>
> Yes, I did that with coll reset schedule.
>
> Quoting Kevin Kyte <kkyte at robsonwoese.com>:
>
> > So how exactly does one do G.3.1.3.12?  If a cool reset schedule were
> setup
> > then it would reference supply air to outside air right? Hello?
> >
> > Kevin Kyte, LEED AP
> > RobsonWoese, Inc.
> > (T) 716-636-1800
> > (F) 716-636-1856
> > http://robsonwoese.com
> >
> > -----Original Message-----
> > From: bldg-sim-bounces at lists.onebuilding.org
> > [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of
> yizhao1 at vt.edu
> > Sent: Thursday, February 28, 2008 9:12 PM
> > To: Aulbach, John
> > Cc: bldg-sim at lists.onebuilding.org
> > Subject: Re: [Bldg-sim] Supply temperature reset in ASHRAE baseline
> >
> >
> > The one in the zone  level appear to be for baseboard control.
> >
> >
> > Quoting "Aulbach, John" <jaulbach at nexant.com>:
> >
> > > Isn't Package VAV a Terminal System? The reheat coil control should on
> > > the ZONE Level, not the SYSTEM level.
> > >
> > > I think..
> > >
> > > -----Original Message-----
> > > From: bldg-sim-bounces at lists.onebuilding.org
> > > [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of
> > > yizhao1 at vt.edu
> > > Sent: Thursday, February 28, 2008 5:00 PM
> > > To: bldg-sim at lists.onebuilding.org
> > > Subject: [Bldg-sim] Supply temperature reset in ASHRAE baseline
> > >
> > > Hi -
> > > In the baseline, ASHRAE requires a supply air temperature reset for
> > > system 5, packaged rooftop VAV w/ reheat (G3.1.3.12). In the air side
> > > system level, I can set up a schedule for cool control, but heat
control
> > > is in grey.
> > > Does anyone know how to input the reset in the system? Economizer is
> > > inlcuded.
> > >
> > > Thanks!
> > >
> > > Ying
> > >
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