[Equest-users] Morning warm-up in eQuest

Paul Diglio paul.diglio at sbcglobal.net
Tue Dec 11 10:19:00 PST 2012

I have not tried this in eQuest, but from field observations, the typical 
morning warm-up sequence, especially for Trane rooftop units with factory 
controls is as follows:

The OA damper goes to the minimum position.
The VAV boxes open fully is so equipped.  In any case, somehow or another the 
HVAC system provides full airflow to the zones during morning warmup or morning 
cool down.
The Supply fan VFD ramps up to 60 Hz.
The gas heat in the rooftop unit is enabled to maintain around 85 degrees supply 
air temperature.

After the zones meet the zone set-points, the unit returns to cooling mode and 
the VAV dampers will modulate accordingly.

I would think in eQuest, the VAV boxes should open fully since the zones are 
below set-point.  I would use a schedule to define the supply air set-point.  I 
think you can also use a schedule to define the supply fan speed.

I would be interested to hear how you solve this problem.

 Paul Diglio, CEM, CBCP

87 Fairmont Avenue
New Haven, CT  06513


From: Chris Jones <cj at enersave.ca>
To: R B <slv3sat at gmail.com>; eQUEST Users List 
<equest-users at lists.onebuilding.org>
Sent: Tue, December 11, 2012 12:37:49 PM
Subject: Re: [Equest-users] Morning warm-up in eQuest

Fan schedule, minimum outdoor air schedule and possibly minimum flow schedule in 
the zones.  There are also the heating and cooling availability schedules if 

At 11:13 AM 11/12/2012, R B wrote:

Has anyone found a good way to model morning warm-up in eQuest?
>Appreciate any suggestions. Thanks
Christopher Jones, P.Eng.
Suite 1801, 1 Yonge Street
Toronto, ON M5E1W7
Tel. 416-203-7465
Fax. 416-946-1005
email cj at enersave.ca
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