[Equest-users] Chiller or boiler seasonal lockout

Wed Jul 27 08:28:51 PDT 2016

LOOP-OPERATION à SNAP to an outdoor temp of 55-65 is my go-to quick means of approximating a seasonal heating/cooling plant lockout (and an appropriate starting point or guess when you don’t/can’t know an exact schedule for manual shutoff).  

As Bill says, you can go further and assign a specific schedule under LOOP-OPERATION using an ON/OFF/TEMP.  Natural progression when you have calendar dates in mind for the lockout and/or you have a combination of snap behavior and forcing things off to consider.

If you need to lock out SPECIFIC boilers/chillers, then you gotta step up to equip-controls/load-management.  Eliminate the simpler options before pressing forward.

~Nick

Nick Caton, P.E.

  Senior Energy Engineer
  Energy and Sustainability Services
  North America Operations
  Schneider Electric

D  913.564.6361 
M  785.410.3317 
E  nicholas.caton at schneider-electric.com <mailto:nicholas.caton at schneider-electric.com> 
F  913.564.6380

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bishop, Bill via Equest-users
Sent: Wednesday, July 27, 2016 8:34 AM
To: Chris Jones; John Aulbach; equest-users at onebuilding.org
Subject: Re: [Equest-users] Chiller or boiler seasonal lockout

John,

I would just use LOOP-OPERATION -> SCHEDULED for the CHW loop instead of bothering with the equipment control and load management.

Regards,

~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP

Senior Energy Engineer

134 South Fitzhugh Street                 Rochester, NY 14608

T: (585) 698-1956                        F: (585) 325-6005

bbishop at pathfinder-ea.com <mailto:wbishop at pathfinder-ea.com>              www.pathfinder-ea.com <http://www.pathfinder-ea.com/> 

 Carbon Fee and Dividend - simple, effective, and market-based.

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Chris Jones via Equest-users
Sent: Wednesday, July 27, 2016 8:32 AM
To: John Aulbach <jra_sac at yahoo.com>; equest-users at onebuilding.org
Subject: Re: [Equest-users] Chiller or boiler seasonal lockout

John,

I wasn’t able to achieve the seasonal control. I am not sure what the correct steps are. It seems like it should be fairly simple – one flag for LOOP-ON and another flag for LOOP-OFF but it doesn’t seem to work.

Christopher Jones, P. Eng.

Rowan Williams Davies & Irwin Inc.
Consulting Engineers & Scientists
901 King Street West, Suite 400, Toronto, Ontario, M5V 3H5
T: (519) 823-1311 ext 2052 

M: (416) 697-0056 

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of John Aulbach via Equest-users
Sent: Tuesday, July 26, 2016 7:51 PM
To: equest-users at onebuilding.org
Subject: [Equest-users] Chiller or boiler seasonal lockout

I thought I had a correct example, but it appears the chiller I have is not shutting off during the winter season. What am i doing wrong (I can apply this also to boiler).

Thanks. It has been a long day.

John R. Aulbach, PE

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