[Equest-users] Cooling Increase DCV and ERV Measures

[Netty Nina]

I had been using -999. I just tried it with 0.001, but still overcooling. Maybe it's a different issue?

Netty Nina<mailto:nnina at ers-inc.com>
ERS, Project Engineer
Ph: 978-521-2550 ext. 224
nnina at ers-inc.com<mailto:nnina at ers-inc.com>

From: R B [mailto:slv3sat at gmail.com]
Sent: Thursday, May 30, 2013 10:40 PM
To: Netty Nina
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Cooling Increase DCV and ERV Measures

DCV - For min OA - make sure you have some non-zero value - I think that triggers the economizer. If you are using the min OA schedule - make sure it is either .001 or -999 for economizer to work. Let me know if helps.


On Thu, May 30, 2013 at 9:23 PM, Netty Nina <nnina at ers-inc.com<mailto:nnina at ers-inc.com>> wrote:
Hi eQuesters,

The next two questions have been asked on here multiple times, but I have scourged the list and haven't found a resolution. My building is a school in New England.

I have a DCV measure that shows an increase in cooling. My thought is that DCV is taking precedence over the economizer. Is there a way to force eQuest to have economizer priority or is there another issue going on?

The other issue is in the Heat Recovery. It also shows an increased cooling load for the building. I tried setting it on an ERV Schedule and limiting it to the heating season. I tried playing with the different controls. I know it's not due to the increase in fan energy needed since the majority of units already have ERVs, but the efficiencies are better than code (and I also tried messing with the fan energy). Someone on the bldg-sim list even suggested controlling the ERV with Exhaust DT and increasing the delta-T to 20F.

I couldn't get any suggestions to work.  How can I avoid overheating? Or is there another issue?

Thanks in advance for any help you can give me.

Sincerely,

Netty


Netty Nina<mailto:nnina at ers-inc.com>, LEED(r) AP BD+C
Project Engineer
ERS
120 Water Street, Suite 350
North Andover, MA 01845

Ph: 978-521-2550 ext. 224<tel:978-521-2550%20ext.%20224>
Fax: 978-521-4588<tel:978-521-4588>
nnina at ers-inc.com<mailto:nnina at ers-inc.com>
www.ers-inc.com<http://www.ers-inc.com/>


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