[Equest-users] Simultaneous Heating & Cooling

John Aulbach jra_sac at yahoo.com
Wed Feb 4 07:59:28 PST 2015

Paul, is that throttling range 3 or 0.3? A tight throttling range makes eQuest do flip flops on cooling and heating. Have you tried a larger throttling range?
I assume this is representing a single PTHP unit. Is it possible that eQuest is cooling part of the hour and heating the other?
This is certainly an interesting problem.
John R. Aulbach, PE 

     On Tuesday, February 3, 2015 2:11 PM, Paul Diglio <paul.diglio at sbcglobal.net> wrote:

 Hi Folks:

I have modeled some PTHP with variable speed compressors.

I am getting simultaneous heating and cooling during the winter months.  See attached spreadsheet.

I have not specified humidity control and the throttling range is .3.  The heat set point is 72 and the cool set point is 75.

Any ideas?

Thank you,

Paul Diglio

87 Fairmont Avenue
New Haven, CT 06513
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