[Equest-users] OA From System Question

James Hansen JHANSEN at ghtltd.com
Mon Jun 3 06:23:43 PDT 2013


I restored default to the other zonal level OA quantities (OA per
person, etc), and kept the OA CFM in that you had listed, and I'm
showing OA CFM for ERU-1.  But I only had a few minutes, so you might
want to double check.

 

GHT Limited
James Hansen, P.E., LEED AP
Senior Associate
1010 N. Glebe Road, Suite 200
Arlington, VA  22201-4749
703-243-1200 (office)

703-338-5754 (cell)
703-276-1376 (fax)

www.ghtltd.com <http://www.ghtltd.com/> 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Paul
Diglio
Sent: Monday, June 03, 2013 9:11 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] OA From System Question

 

Morning:

I am trying to model a chilled beam system as induction units.  The
primary air is supplied by an ERU.  I set the outside air to 0 on the
chilled beams HVAC systems tab.

In the chilled beam zone tab I set the outside air to the primary CFM
and the overall CFM to the induced air flow.

Per the eQuest help menu, "The sum of the OA requirements for all
SYSTEMs that reference an OA-FROM-SYSTEM is used to set the referenced
OA-FROM-SYSTEM value for MIN-OUTSIDE-AIR, SUPPLY-FLOW as well as adjust
the referenced OA-FROM-SYSTEM directly served ZONE maximum and minimum
flows for both heating and cooling." 

But per my hourly reports, the ERU is not supplying the necessary amount
of primary air and in the summer the ERU flow drops to .01 CFM.

Attached are the project files.  Any ideas?

Thank you,

 

Paul Diglio, CEM, CBCP

87 Fairmont Avenue
New Haven, CT 06513
203-415-0082

 

www.pdigliollc.com

 

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