Vertiv Liebert iCOM DP400/500 Installer/User Manual page 142

Table B.1 User Menu Setpoints by Line ID (continued)
Line Parameter
ID Name
U107 Fan Setpoint
Fan Control
U108
Sensor
Optimized
U110
Aisle Enabled
2nd
U113 Temperature
Setpoint
Supply Temp
U114
Limit Setpoint
BMS Backup
U116 Temp
Setpoint
BMS Backup
Fan Setpoint
U117
BMS Backup
Fan Speed
Return
U119 Compensation
Setpoint
134
Default
Range Description
Setting
Required anytime the fan operates from a different sensor than that used for the temperature
setpoint. EX: temperature setpoint is set to Supply Air and the fan control is set to Remote Air.This
41 - 104 °F 73 °F
is considered "Optimized Aisle" control, which decouples the fan and cooling capacity modulation.
5.0 - 40.0 °C 22.8 °C
The remote sensor setpoint would modulate the fan speed and the supply sensor setpoint would
modulate the cooling.
Supply Sensor
Remote Determines which sensor will control the speed of the fan. If set to "Manual", then the fan control
Sensor Return Disabled can be set through the local iCOM display or through the BMS system via one of the various
Sensor Intellislot monitoring cards.
Manual
This read-only value indicates if the Liebert iCOM controller is setup in a Optimized Aisle
configuration. To enable optimized aisle via the iCOM display, the Supply Air sensor must be set to
Disabled
Disabled control the cooling capacity and the remote sensor must be set to control the fan speed. This
Enabled
allows the cooling unit to maintain rack temperatures whill still maintaining an even under-floor air
temperature when controlling unbalanced rooms.
Allows for a dry contact through the customer input connections. When a customer input
connection is set for 2nd temperature setpoint and that input is triggered, then the value set in this
41 - 104 °F 73 °F
parameter sets the active temperature setpoint the unit will maintain. If the unit is configured for
5.0 - 40.0 °C 23.0 °C
De-coupled Mode, then this setpoint will only affect the temperature control setpoint; it will not
affect the fan control setpoint.
Selects the minimum discharge air temperature. When the actual sensor reading approaches this
41 - 81 °F 41 °F
parameter, the cooling capacity will be limited to avoid going below the Supply Limit Temperature
value. This parameter must be enabled in the Service Menu / Setpoints menu prior to setting a
5.0 - 27.0 °C 5.0 °C
supply limit setpoint.
Selects a temperature setpoint that will be activated in the event of a BMS time-out or a customer
41 - 104 °F 73 °F
input signal. The BMS timer and/or the customer input must be configured for this parameter to
activate. If the unit is operating in De- coupled mode, then this setpoint will only affect the
5.0 - 40.0 °C 23.0 °C
temperature control setpoint; it will not affect the fan control setpoint.
41 - 104 °F 73 °F
Selects a temperature setpoint when the backup fans will be activated in the event of a BMS time-
5.0 - 40.0 °C 23.0 °C
out or a customer input signal. The BMS timer and/or customer input must be configured in order
for this parameter to activate. If the unit is operating in De-coupled mode, then this setpoint will
only affect the temperature control setpoint; it will not affect the fan control setpoint.
0 - 100 % 100%
Allows the return air sensor to be used even when in Supply or Remote temperature control mode.
Return Compensation modifies the temperature setpoint to ensure that the return air temperature
41 - 104 °F 5.0 73 °F 23.0
is kept above a specific temperature. If the return compensation value is set to 80 °F and the
- 40.0 °C °C
actual return temperature falls to 75 °F, then the controlling temperature setpoint will be increased
and will reflect in the "Control Temp Act" parameter.
Vertiv™ | Liebert® iCOM™ Installer/User Guide