[Equest-users] oa from system

[Joshua Wolfe]

Try a system type of IU, with the induction ratio matching that of the FCs. The main system then needs to be set to 100% OA with constant cool and heat control set to 68F. You will have to fake in extra fan power to match that of the FCs. Hope this helps.

Josh
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Verena Kindl
Sent: Tuesday, September 01, 2009 3:15 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] oa from system

Hello,

I have a SZRH system which should provide outside air to the FC system. The air it provides should always be 68 F. What temperatures shall I put for cooling design and heating design / thermostat setpoint T. I put min supply temp and max supply temp to 68 F and the other design temperatures to 53/90F cause I do not have a thermostat there ( the air is always provided with 68 F). Then I specified the OA constant to 4000 cfm and determined the min outside air ratio =1. Is there sth wrong with my temperature settings as I do not get any coil loads for the system (SS-J report)? When I set all temperatures to 68 F the ventilation air I require is too huge. Do I have to put the min OA ratio to 1, 0 or shall I leave it blank for the FC system? I mean is it enough to put OA from system SZRH? Cause someone told me I have to put it to 0 as I do not have any outside air put I do it is from the system. I am confused.
Thanks for your help.
Verena

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