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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.<br>
<br>
On 2/27/14 2:17 AM, The Watt Doctors - Dave Weigel wrote:
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<div>Hi Group,</div>
<div> </div>
<div>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.</div>
<div> </div>
<div>Any thoughts? </div>
<div> </div>
<div>Thanks!</div>
<div> </div>
<div>Dave</div>
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</div>
<br>
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