[Equest-users] Schedule for zone reheat and pre-heat

[Hernandez, Arturo]

Thank you for your input.  However I have these coments.

1) I need the zones to maintain at least 65F but only via the preheat
furnace.  No electric re-heat via VAV boxes...  I am not following how
setting the t-stat in the zone will help out.

2) The min outside air ratio is set to 0% but shouldn't at night but
that is just the Minimum.... wouldn't I want the maximum ratio (if it
exist)?
 

ARTURO HERNANDEZ, Mechanical
OWP/P

111 West Washington Street | Suite 2100
Chicago , Illinois 60602-2714
312.960.8324 Direct | 312.827.8324 Fax | ahernandez at owpp.com |
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-----Original Message-----
From: Bruno Lee [mailto:brunolee at psu.edu] 
Sent: Wednesday, September 03, 2008 11:42 AM
To: Hernandez, Arturo
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Schedule for zone reheat and pre-heat

1) Air-side HVAC Zone Parameters > Heating > Heating T-stat schedule
	the schedule setting is temperature type, you could manipulate
the  
set-point such that it acts according to your design.

2) Air-side HVAC System Parameters > Outdoor Air > Minimum Air Schedule
	the schedule setting is Frac/Design type, you could set it to
"0" if  
you want to shut off OA.

Schedule can be defined by right clicking on the schedule folder, then  
"create schedule". Create Daily first, then Weekly, then Annual.

The system is supposed to run as an integrated unit, by changing  
schedule of any individual component may result in too many unmatched  
hours, you should check the SS-F report to see if that is the case. If  
so, you might also want to check hourly result to see in details the  
reason behind, and modify your schedule accordingly.

I hope I haven't misinterpreted your questions.

Bruno Lee
M.S. Student
Department of Architectural Engineering
Penn State University


On Sep 3, 2008, at 9:31 AM, Hernandez, Arturo wrote:

> I am having a problem modeling a building which has a PVAV with a  
> pre-heat furnace and VAV electric reheat boxes.  The pre-heat  
> furnace is intended to raise the temperature up to 55F while the  
> heating is done locally at the VAV electric reheat box. (This is  
> where I have the problem) At night (and weekend) the electric re- 
> heat on the boxes are shutoff and  outside air is shut off.  The  
> building is set back in temperature and heated via the preheat  
> furnace.  This is what I am trying to find out:
>
> 1.       Is there a way to schedule the electric reheat coils on the  
> VAV boxes?
> 2.       Is there a way to shut off the outside air damper at night/ 
> weekend?
>
> Any help will be appreciated.
>
> Thank you in advance,
>
> ARTURO HERNANDEZ
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