Daikin DPS - Heating Menu; Dehumidification Menu

Heating Menu
The Heating menu provides a summary of the control
parameters for units with heating. The unit’s heating mode
of operation is controlled by the control temperature and the
heating set point temperature. The unit goes into the heating
mode of operation by analyzing the control temperature.
The control temperature can be return temperature, space
temperature or outside air temperature. The unit goes into the
heating mode of operation when the control temperature is
below the heating set point by more than ½ the deadband.
Table 12: Heating Menu
Occ Htg Spt is an adjustable item which sets the control
temperature below which the unit will go into the heating mode
of operation.
Unocc Htg Spt is an adjustable item which sets the zone
temperature below which the unit starts up and provides
unoccupied heating (night setback) during unoccupied periods.
MWU Spt is an adjustable item which sets the heating set
point to be used during morning warm up on a discharge
temperature control unit. CAV units use the Occ Htg Spt for
morning warmup operation.
DAT Htg Spt is an adjustable parameter which sets the
heating discharge set point.
Dehumidication Menu
Table 13: Dehumidication Menu
Dehum Status is a status only item that indicates whether
dehumidication is enabled or disabled.
Rel Humidity is a status only item that indicates the current
relative humidity reading of the sensor.
DewPoint is a status only item that indicates the current
dew point value that is calculated by the controller using the
Rel Humidity= value and either the Space Temp= or Return
Air= value, depending on the setting of the Humidity Sensor
Location. This parameter can either be set to “Space” or
“Return.”
Dehum Method is an adjustable item used to set the
dehumidication method to either “RH” or “DewPt.” When
this parameter is set to “RH,” dehumidication operation
is controlled to maintain the Rel Humidity= value at the
RH Set Point=. When this parameter is set to “DewPt,”
dehumidication operation is controlled to maintain the Dew
Point value at the Dewpoint Spt=.
RH Set Point is an adjustable item used to set the relative
humidity value at which the relative humidity will be controlled
to during dehumidication operation.
Dewpoint Spt is an adjustable item used to set the dewpoint
value at which the dewpoint with will be controlled to during
dehumidication operation.
Reheat Spt is a status only item which is used to indicate
the DAT temperature to which the HGRH valve will be
controlled in the Cooling and Fan Only operating states
while dehumidication operation is active. The Reheat Spt=
parameter always equals the DAT Clg Spt whenever the Ctrl
Temp Src parameter is set to None or the unit ia not in the
Fan Only operating state. When the unit is in the Fan Only
operating state (and the Ctrl Temp Src = None) the Reheat Spt
will vary between the Min Reheat Spt= and Max Reheat Spt=
as the Control Temperature input varies between Occ Clg Spt=
and the Occ Htg Spt=.
Reheat Cap is a status only item that indicates the current
reheat capacity value.
Item Display
Name
Default
Setting
Range
Password
Level
Occ Htg Spt= 68.0°F 0.0–100.0°F 6
Unocc Htg Spt= 55.0°F 40.0–100.0°F 6
MWU Spt= 70.0°F 40.0–100.0°F 6
DAT Htg Spt= 85.0°F 40.0–140.0°F 6
Item Display
Name
Default
Setting
Range
Password
Level
Dehum Status= —
Disabled
6
Enabled
Rel Humidity= — 0–100% 6
Dewpoint= — -50–150°F 6
Dehum Method= None
None
6Rel Hum
DewPt
RH Setpoint= 50% 0–100% 6
Dewpoint Spt= 50°F 0–100°F 6
Reheat Spt= — 40.0–100.0°F 6
Reheat Cap= — 0–100% 6
VIew/set Menu
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