11
1.800.627.4499
DN-Series Integrated Programmable Controls
DOAS
OVERVIEW
11. VRF Control Sequence
12. Dual Temp Coil (using BMS command for heat/cool signal)
13. Unoccupied operation with optional recirculation damper
14. Alarm alerts and logging
1.2 ENERGY RECOVERY BASICS
IMPORTANT
It is important to understand and use the equipment airstream terminology as it is used in
this manual. The airstreams are defined as:
u
Outside Air (OA): Air taken from the external atmosphere and, therefore, not previously
circulated through the system. Each DN unit has an OA air inlet, located on the end wall.
u
Supply Air (SA): Air that is downstream of the enthalpic cores and is ready for conditioning.
u
Conditioned Air (CA): Air that is supplied to an occupied space. Each DN unit has a CA
outlet that may deliver either conditioned RA or SA. The CA outlet is optionally located on
either the end wall or the floor.
u
Return Air (RA): Air that is returned to a heating or cooling appliance from a conditioned
space. When the DN unit operates in recirculation mode, RA is conditioned and returned to
the occupied space in the form of CA. Each DN unit has an RA inlet, optionally located on
either the floor or the end wall of the unit.
u
Exhaust Air (EA): Air that is removed from a heating or cooling appliance and discharged.
Each DN unit has an EA outlet with a damper. The EA outlet is on the back wall or top of
the unit.
RenewAire energy recovery ventilators use static-plate, enthalpy-core heat exchangers that
have no moving parts.
u
During summer months, the hot and humid OA passes by the cooler, drier RA, lowing its
temperature and humidity.
u
During winter months, the cold and dry OA passes by the warmer, moister RA, raising its
temperature and humidity.
EA
OA
RA
SA
CA
