I have gone through the steps outlined in previous discussions to
implement a DOAU using a dummy zone. My question is whether it is
possible to implement DCV based on the sum of zone occupancy in order to
vary the outdoor air flow rate?

I have tried multiple scenarios including having the DCV sensors at the
room system and at the DOA system. I am using a variable speed fan. Is
this scenario possible and which parameters do I need to modify?

Thanks

"DOAU" = SYSTEM

TYPE = PVVT

HEAT-SOURCE = HOT-WATER

MAX-SUPPLY-T = 65

HEAT-SET-T = 65

MIN-OUTSIDE-AIR = 1

RECOVER-EXHAUST = YES

HW-LOOP = "Hot Water Loop"

CONTROL-ZONE = "_DUMMY-ZONE_"

ERV-RECOVER-TYPE = ENTHALPY-WHEEL

ERV-RUN-CTRL = WHEN-MIN-OA

..

"_DUMMY-ZONE_" = ZONE

TYPE = CONDITIONED

OUTSIDE-AIR-FLOW = 5400

SPACE = "_DUMMY-SPACE_"

..

Alan Jackson, LEED(r) A.P.