Figure 58 Setpoints Parameters Screen - Page 2 - Emerson Liebert CRV User Manual

Figure 58 Setpoints parameters screen - Page 2

SETPOINTS (page 2 of 4)
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S122
Humidity Setpoint—This parameter allows the user to select a humidity that the cooling unit will
maintain by removing or adding moisture to the air. This parameter is adjustable from 20-80%. The
factory default setting from the factory is 50%.
Humidity Control Type—This parameter selects the humidity control calculation. Setting this
parameter to "Relative" will control the humidity without considering any temperature deviations.
"Predictive" and "Absolute" control consider the temperature deviation from temperature setpoint so
that a constant level of moisture is kept in the area based on the humidity sensor reading and the
temperature deviation from setpoint. The factory default setting is "Predictive."
Humidity Deadband—This parameter can be set to avoid overshooting of the setpoint and cycling
between humidification and dehumidification. The value entered into this field will be split in half by
the temperature setpoint. Example: If the humidity setpoint is 50% and a 4% deadband is set then no
humidity control will be activated between 48% and 52%.
Humidity Proportional Band—This parameter adjusts the activation points of the humidifier and
compressors based on the actual sensor 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.
Humidity Integration Time—This parameter adjusts the capacity of the unit based on time away
from setpoint so that accurate humidity control can be maintained. This parameter is only active
when Control Type is set to "PI."
Dehum Proportional Band—The parameter adjusts the activation points of dehumidification
based on the actual sensor 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.
Dehum Integration Time—This parameter adjusts the capacity of the unit based on time away
from setpoint so that accurate humidity control can be maintained. This parameter is only active
when control type is set to "PI".
Dehum/Heat Low Limit 1—This parameter sets the temperature at which the compressor will be
deactivated for dehumidification control. Example—If Low Limit 1 is set to 4°F (2.2°C) and the
temperature setpoint is 70°F (21.1°C), then dehumidification will turn off at 66°F (18.8°C).
Low Limit 1 reset—This parameter controls when the temperature has increased enough to re-
enable dehumidification.
® ™
Liebert CRV
PASSWORD (Actual Level 0)
Humidity Setpoint
Humidity Control Type
Humidity DeadBand
Humidity Proportional Band
Humidity Integration Time
Dehum Proportional Band
Dehum Integration Time
Dehum/Heat Low Limit 1
Low Limit 1 reset
for next/previous unit
then
to change parameter
to select parameter
70
Liebert iCOM
UNIT 01
????
45%
PI
5%
5%
0min
5%
0min
-9°F
0°F
to confirm
®
Control