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DN-Series Integrated Programmable Controls
DOAS
46
Dehumidification
and
Cooling Mode
Heating
Mode
Vent Mode
Sensible
Cooling
Mode
Design Dew Point
Outdoor Dry Bulb Temperature
6.4.1 Cooling Mode
For any type of cooling there is an outdoor air lockout temperature below which cooling will not
be allowed. Note that the default is high. This is to insure that at start up, you can start your
fans without worrying if the tempering will also start. This value will need to be lowered to an
acceptable value.
6.4.2 Cooling Control Type
For each type of cooling, you can choose a control type.
Control types available:
u
CA: Be sure to install your CA temperature sensor far enough down the duct
to prevent over-cycling
u
RA: If you are only feeding one space this is a useful control method. RA is
always used for unoccupied operation. RA should also be used for staged cooling.
6.4.3 Cooling Types
The following cooling types are supported:
u
On/Off: one-stage DX or heat pump—See
Combined Tempering
for heat pump operation
u
2 stage: two-stage DX or heat pump—See
Combined Tempering
for heat pump operation
u
CW Mod: 0–10VDC signal to a chilled water valve, also used in Dual Temp Coil—See
Combined Tempering.
u
VRF—See
Combined Tempering
u
PDX: Packaged DX unit with variable speed compressor integrated.
The cooling type is either set in the
Unit Configuration
or at the top of this screen.
6.4.3.1 On/Off: One Stage of Cooling
If this is a one-stage heat pump, see
Combined Tempering
.
The mode is determined by the outdoor temperature and the cooling lockout
temperature settings.
TEMPERING CONTROL
