Vertiv Liebert iCOM DP400/500 Installer/User Manual page 145

Table B.2 Service Menu Setpoints by Line ID (continued)
Line Parameter
Range
ID Name
41 - 65 ◦F
Dew Point
Setpoint
5.0 - 18.3 ◦C
S125
Humidity
20 - 80 %
Setpoint
Relative
Humidity Compensated
Control Type Predictive
Dew Point
S126
Humidity
Supply Return
Control Mode
Dew Point
2 - 18 ◦F
Proportional
1.1 - 10.0 K
Band
S127
Humidity
Proportional 1 - 20%
Band
Humidity
S128 0.0 - 25.0 min
Integration Time
0 - 18 ◦F
Humidity
S129
Deadband
0.0 - 10.0 K
Dehum Supply
41 - 104 ◦F
Temperature
5.0 - 40.0 ◦C
Setpoint
S130
Actual Dehum
41 - 104 ◦F
Temperature
5.0 - 40.0 ◦C
Setpoint
0 - 18 °F
Dehum Setpoint
Adjustment
0.0 - 10.0 K
S131
Dehum Setpoint 0.01 - 0.10
Filter K/s
Supply Sensor
Dehum
Remote
Reheat/LL
Sensor Return
Sensor
Sensor
S132
Dehum
41 - 104°F
Reheat/LL
5.0 - 40.0 °C
Setpoint
Default
Description
Setting
calculate the corresponding RH% based on that sensors actual temperature.
48 °F
Selects a humidity level that the cooling unit will maintain by removing or adding moisture to
8.9 °C
the air. The humidity setpoint will either be set in percent RH or as a Dew Point value
depending on what the humidity control type is set for.
0.5
Selects the humidity control calculation. Setting this parameter to Relative (%RH) will control
the humidity without considering any temperature deviations. Predictive and Absolute
control consider the temperature deviation from temperature setpoint so that a constant
Predictive level of moisture is kept in the area based on the humidity sensor reading and the
temperature deviation from setpoint. Compensated is recalculated with the actual deviation
from temperature setpoint. 1 degree Celsius is equal to 3 %RH, indirect proportional. If
temperature increases, the humidity setpoint is decreased and vice versa.
Return
8 ◦F
Adjusts the activation points of the humidifier and compressors based on the actual sensor
4.4 K
values deviation from setpoint. The smaller this number, the faster the compressors and
humidifier will increase capacity. Too small of a number may cause the unit to short cycle or
overshoot setpoint.
0.2
Adjusts the capacity of the unit based on a time away from setpoint so that accurate
humidity control can be maintained. If the integration time is set to 0, the humidity control
0.0 min
operates as a "proportional only" control. When integration time is set, the control mode
changes to "PI" control
Prevents overshooting of the setpoint and cycling between humidification and
4 ◦F
dehumidification. The value entered in this field will be split in half by the temperature
2.2 K
setpoint.
54 °F
Allows for a target temperature setpoint to be activated when a call for dehumidification is
enabled instead of the traditional method of over cooling the space by increasing cooling to
12.2 °C
100% and lowering fan speed if equipped. Must be in supply air control mode. When a call for
dehumidification is active, the supply or remote sensor setpoint will be lowered to this
50 ◦F
parameter. This parameter should be set below the accepted dew point threshold of your
10.0 ◦C
space. Used only when supply dehumidification is enabled.
9 °F
Sets the amount of that the Dehum Temp Setpoint is adjusted once the reheats activate. EX:
5.0 K
If the unit is equipped with a reheat device, this parameter will increase the dehumidification
temperature as the call for reheats are increased until the reheat call is at 100%. When the
reheats are at 100%, the full Dehum Setpoint Adjustment will be applied.
0.02 K/s
Return
Sensor
Sets the sensor and temperature start point that the reheat will be deactivated and
dehumidification will be stopped due to over cooling the space in a call for dehumidification.
71 °F
21.7 °C
137