Vertiv Liebert iCOM DP400/500, Installer/User Manual

Page: 146 / 180

Line
ID
Parameter
Name
Range
Default
Setting
Description
S133
Dehum/Reheat
Low Limit 1
Temp
Hysteresis
-30.0 °F - -
2.0°F
-16.7K - -1.1K
-5 °F
-2.5 K
Dehum/Reheat Low Limit 1
Dehum/Reheat
Low Limit 2
Temp
Hysteresis
-30.0 °F - -
2.0°F
-16.7K - -1.1K
-7 °F
-3.9 K
Dehum/Reheat Low Limit 2
S13A
Dehum Reheat
Proportional
Band
2 - 54 °F
2.0 - 30.0 K
14 °F
7.8 K
Sets the reheat proportional band for reheat operation independently of the temperature
proportional band. This parameter can be used to activate the reheats at different points
below the temperature setpoint.
S13B
Estimated Aisle
Temp
41 - 104 °F
5.0 - 40.0 °C
75 °F
23.9 °C
Sets an estimated cold aisle temperature when humidity control sensor is set to remote and
no remote temperature sensors are installed at the unit. This estimated temperature will be
used to determine the humidity versus using an actual temperature in the cold aisle that may
fluctuate during modes of dehumidification or load changes of the IT equipment. This
provides a stable control point to reference the actual measured dew point from the return
sensor.
S135
DT1
(Room/Outdoor)
Type
0 = Disabled
1 = Contact
2 = EFC
3 = Temp
4 = Set
Temp
Sets the activation point of the ambient dry bulb outdoor temperature as it relates to either an
indoor actual temperature or temperature setpoint.
S136
DT1
(Room/Outdoor)
Value
2 - 72 °F
1.0 - 40.0 K
5 °F
3.0 K
field-adjustable setpoint or temperature
S137
DT2 (Room/FC
Fluid) Type
Disabled
Contact
Temp Set
Disabled
Determines the method to activate the water circuit on Dual-Cool and Free- Cool units. It may
be set to CONTACT, TEMP or SET. CONTACT uses a dry contact to activate the free-
cooling circuit. TEMP uses a sensor reading that can be compared to the return temp to see
whether free-cooling is possible. SET compares the temperature set to the free-cooling
sensor to determine free-cooling availability.
S138
DT2 (Room/FC
Fluid) Value
0 - 36 °F
0.0 - 20.0 K
12 °F
6.7K
sets the delta T between the actual temperature and fluid temperature that must be met
before free-cooling will occur.
S139
Minimum
Chilled Water
Temp Enable
No Yes Disabled
Enables the temperature at which free-cooling can operate independently without assistance
of the compressor circuit(s).
S140
Minimum
Chilled Water
Temp Value
32 - 68 °F
0.0 - 20.0 °C
45 °F
7.0 °C
Sets the water temperature at which 100% free cooling can be provided to handle the full
room load. When the fluid temperature is below this setting, then the compressors will no
longer turn ON until the water temperature is above the minimum CW temperature.
S141
Lockout FC at
Fluid Below
6 - 50 °F
-15.0 -
+10.0°C
32 °F
0.0 °C
Prevents frost from building up on the free cooling pipes when the outdoor ambient
temperature is extremely low by turning OFF the free-cooling circuit when the water
temperature is too low.
Table B.2 Service Menu Setpoints by Line ID (continued)
Vertiv™ | Liebert® iCOM™ Installer/User Guide
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