[Equest-users] Strange ERV Error and Results

[Patrick J. O'Leary, Jr.]

how is the erv controlled?  if you take the default on when ahu supply 
fan unit is on then it will cost you more energy as the erv runs 
continuously even when there is a) no advantage to do so, and b) when it 
is detrimental to do so.  try changing control to a delta t between 
exhaust air and outside air temp via a eem & play with the delta.  my 
experience in southern arizona is that a 27 d t is optimum where i am at.

On 2/27/14 2:17 AM, The Watt Doctors - Dave Weigel wrote:
> Hi Group,
> My system is a simple VAV. When I click to add an ERV, it ties up my 
> machine completely for about 3-4 minutes and then throws up the error 
> for "maximum number of tracked changes exceeded."  But it accepts the 
> ERV and lets me configure it.  This results in a vast decrease in 
> heating energy, but a large increase in cooling energy. Weather is 
> Atlanta.  I don't understand why cooling energy would increase with 
> the simple addition of an ERV.
> Any thoughts?
> Thanks!
> Dave
>
>
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