Line
ID
Parameter
Name
Range
Default
Setting
Description
S107.1
Temperature
Derivative Time
0 - 900 sec 0 sec
S108.1 AutoSet Enable No Yes Yes
Sets the temperature and humidity proportional bands automatically based on the type
of unit when this parameter is set to YES and if teamwork modes are selected. To
change the proportional bands, this parameter must be set to NO. If supply or remote
sensors are used, then this value is always set to NO.
S109.1
Temperature
Deadband
0 - 36°F
0 - 20.0 K
2°F
1.1 K
Avoids overshooting of the setpoint and cycling between cooling and reheats. The
value entered in this field will be split in half by the temperature setpoint.
S110.1
Supply Limit
Enabled
No
Yes
No
Chilled water units may be set up with the supply air sensor to maintain a minimum air
temperature under the raised floor to help prevent condensation. In order to avoid
supply temperatures that are too low, the Supply Limit can influence the opening of
three-point or analog actuators or the output of analog values. The control compares
the deviation from the return air setpoint & the supply limit setpoint, and calculates the
output to the actuator from the smaller deviation.
S110.2
Supply Limit
Setpoint
41 - 81°F
5.0 - 27.0°C
41°F
5.0°C
S111.1
Heater
Deadband
0 - 36°F
0 - 20.0 K
0°F
0.0 K
Changes the amount of deviation below the temperature setpoint that the heaters will
cycle ON and OFF. This value is added to the heating side of the normal temperature
deadband.
S113.1
Enable
Temperature
Compensation
No Return
Supply Ret+Sup
No
Temperature compensation allows for a second or even a third sensor to be used that
will influence the units cooling or heating. Return compensation can be used when the
supply or remote sensors are being used for control. Then the return sensor is then
monitored to maintain a minimum return temperature. Supply compensation can be
used only when Optimized Aisle (TW3) is enabled. The supply sensor will not only be
used for controlling cooling capacity but will also monitor the cold aisle temperature to
ensure that the cold aisle temperature setpoint is met.
S114.1
Return
Compensation
Setpoint
41 - 104°F
5.0 - 40.0°C
73°F
23.0°C
The temperature setpoint where compensation begins to operate by increasing the
supply air setpoint.
S115.1
Return
Compensation
Value
0 - 18°F
0.0 - 10.0 K
0°F
0.0 K
The return compensation band/value will determine how quickly the cooling capacity
is adjusted as the return temperature drops below the return compensation setpoint.
S115.2
Return
Compensation
Band
0 - 18°F
0.0 - 10.0 K
0°F
0.0 K
S116.1
Supply
Compensation
Value
0 - 18°F
0.0 - 10.0 K
0°F
0.0 K
The Supply Compensation value determines how much the supply temperature
setpoint will be reduced when the units fan speed is at 100% and the cold aisle is not
able to maintain temperature setpoint. Any modifications to the supply temperature
setpoint will be shown at the temperature setpoint on parameter S103 as the actual
active control point.
S121.1
CW Capacity
Filter @ 100%
0.01 - 99.99
%/s
0.60 %/s At the end of the p-band (at 100% call for cooling), it is typically set higher (faster)
BMS Backup
Temp Setpoint
41 - 104°F
5.0 - 40.0°C
73°F
23.0°C
Selects a temperature setpoint that will be activated in the event of a BMS timeout. The
BMS timer must be configured for this parameter to be active.
U113.1
2nd
Temperature
Setpoint
41 - 104°F
5.0 - 40.0°C
73°F
23.0°C
Selects a temperature setpoint that will be activated in the event of a customer input
signal configured as the second setpoint. The customer input must be configured for
the parameter to activate.
Table B.1 Service Menu Setpoints by Line ID (continued)
206
Vertiv™ Liebert® iCOM™Installer/User Guide
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