[Equest-users] PIU system central heat coil ouput

[David Reddy]

Hi all,
I am modeling a PIU system w/ a water-cooled DX coil and series electric 
FPBs; no central or preheat heating coils.  Using eQ v3.64

SV-A report indicates heating capacity for system is 0.

Despite this configuration, hourly reports of for SYSTEM, 'Total central 
heat coil output (Btu/hr)' indicates there is varying amount of central 
heat energy output in the first 1-2 and in some cases, the last 2-3 
hours of many days in heating months (location Seattle, WA).  This is 
also confirmed by looking at the difference in energy reported between 
SS-A Heating and SS-B Zone Heating.  It is not necessarily a trivial 
amount of energy, ~25% of total.

Have others observed this before, and if so, found a way to fix this?

Can't say I've tried everything I can think of, but this is what I have 
tried:

A) Set HEAT-SOURCE = "ELECTRIC" and use a very small capacity both -1 or 
-1000
B) A + setting HEAT-CONTROL = "CONSTANT"
C) B + set HEAT-SET-T various values, including minimum (50F)
D) Setting HEATING-SCHEDULE to something that locks out heating. This 
works, but also locks out zone heating, so not a viable solution

Thanks in advance for any input.
-David


-- 

David Reddy

*360 Analytics*
Building Energy Analysis Consultants
mail:     9750 3rd Ave NE, Suite 405, Seattle, WA 98115
office:  206.557.4732 x 201
cell:      206.406.9856
web:    www.360-Analytics.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20141017/521ed94d/attachment-0001.htm>