[Bldg-sim] climate zone 4a economiser

[Chris Yates]

Brilliant.  Thanks everyone.

Sent from my Android device. Please excuse typos, etc.
On 29 Jan 2014 17:57, "Nick Caton" <ncaton at smithboucher.com> wrote:

>  I'm with Jim.
>
>
>
> G3.1.2.6.B and corresponding section G3.1.2.7 do not kick in if
> economizers aren't required.
>
>
>
> ~Nick
>
>
>
> [image: cid:489575314 at 22072009-0ABB]
>
>
>
> *NICK CATON, P.E.*
>
> SENIOR ENGINEER
>
>
>
> Smith & Boucher Engineers
>
> 25501 west valley parkway, suite 200
>
> olathe, ks 66061
>
> direct 913.344.0036
>
> fax 913.345.0617
>
> www.smithboucher.com
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Jim Dirkes
> *Sent:* Wednesday, January 29, 2014 6:01 AM
> *To:* Chris Yates; bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] climate zone 4a economiser
>
>
>
> Dear Chris,
>
> 4a does not appear to be referenced in Table 6B...
>
> Regardless, the two tables go together and a high limit is not applicable
> if no economizer is used.
>
> p.s., I don't recall, but I think my red marks reflect some addenda.
>
>
>
>
>
> *James V Dirkes II, PE, BEMP, LEED AP*
> *www.buildingperformanceteam.com*<http://www.buildingperformanceteam.com/>
> *Energy Analysis, Commissioning & Training Services*
> 1631 Acacia Drive, Grand Rapids, MI 49504 USA
> 616 450 8653
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [
> mailto:bldg-sim-bounces at lists.onebuilding.org<bldg-sim-bounces at lists.onebuilding.org>]
> *On Behalf Of *Chris Yates
> *Sent:* Wednesday, January 29, 2014 6:51 AM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] climate zone 4a economiser
>
>
>
> Sorry this was a question! I was just trying to be concise but realised
> when I re-read that it was incomplete.
>
>
>
> It appears that an economizer is not applicable to a baseline building in
> this case. However, G.3.1.2.6B infers that there may still be a high limit
> shutoff.
>
>
>
> I thought the high limit shutoff was the economizer!
>
>
>
> Grateful for your longsuffering patience!
>
>
>
> On Wed, Jan 29, 2014 at 11:25 AM, Chris Yates <
> chris.malcolm.yates at gmail.com> wrote:
>
> Dear all,
>
>
>
> ASHRAE 90.1 - 2007, App G
>
> typical office building
>
> Climate zone 4a
>
>
>
> A mixing box should operate predominantly on re-circ whilst introducing a
> minimal amount of fresh air to the building (such as that required to meet
> ASHRAE 62.1).
>
>
>
> Does anybody else find the tables G3.1.2.6A & B confusing?
>
>
>
> Cheers
>
>
>
> Chris
>
>
>
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