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DN-Series Integrated Programmable Controls
DOAS
TEMPERING CONTROL
This type of cooling cycles one stage of cooling to maintain the cooling setpoint. You must set a
hysteresis value whereby the stage will turn on at the se hysteresis and turn at setpoint.
There is also a minimum on and off time to prevent over-cycling.
Increasing temperature turns
mode ON at se hysteresis
Decreasing temperature
turns mode OFF at setpoint
Hysteresis
Se Hysteresis
Setpoint
OFF
ON
TEMPERATURE
The cooling status can be monitored in the
Unit Status
. The screen shows:
u
Cooling Control Variable which will be:
u
as selected if in occupied operation
u
RA for unoccupied operation
u
Coil Leaving Temperature in dehumidification mode if reheat is used (heating
or HGRH
u
Supply temperature in dehumidification mode if reheat is not used
u
Cooling setpoint which will be:
u
Occupied cooling setpoint if in occupied operation, not dehumidification
u
Unoccupied cooling setpoint if unoccupied operation
u
Coil Leaving Temperature setpoint if dehumidification mode and reheat is used
u
Dehumidification setpoint if dehumidification mode and reheat is not used
u
Whether cooling enable 1 is ON
u
Cooling Status