Technical Specifications

BACnet Communications - Thermal Management Products
Liebert
®
IntelliSlot
®
Modbus/BACnet 274
Table 86 Liebert Challenger 3000
™
, Liebert Challenger ITR
™
, Liebert CW
™
, Liebert Deluxe System/3
™
,
Liebert DS
™
, Liebert DSE
™
, Liebert HPM
™
, Liebert PeX
™
, Liebert PDX
™
- Glossary
Data Label Data Description
Actual Air Temperature Set
Point
The actual set point being used for air temperature control. This value may differ from [Air
Temperature Set Point] if compensation is applied by the control.
Actual Auxiliary Air
Temperature
Actual auxiliary air temperature value being used for control. This value may differ from
the raw value received from the auxiliary device if filtering is applied.
Actual Cold Aisle Humidity
Actual humidity value being used for cold aisle humidity control. The value is calculated
from multiple humidity measurements using [Cold Aisle Humidity Calculation Method].
Actual Cold Aisle Temperature
Actual temperature value being used for cold aisle temperature control. The value is
calculated from multiple temperature measurements using [Cold Aisle Temperature
Calculation Method].
Actual Humidity Set Point
The actual set point being used for humidity control. This value may differ from [Humidity
Set Point] if compensation is applied by the control.
Adjusted Humidity
Humidity value being used for control. This value may differ from the actual measured
[Return Humidity] based on several factors which may include, but are not limited to,
selection of humidity control sensor and humidity control type.
Air Economizer Availability
Indicates if the outside air conditions are appropriate for cooling with the air economizer or
glycol freecooling.
Air Economizer Control Source Source of control of the air economizer.
Air Economizer Emergency
Override
Indoor room temperature has exceeded its upper threshold and the outdoor air damper
has been opened for emergency cooling.
Air Economizer Reduced
Airflow
Air economizer filter is dirty and needs to be cleaned or replaced.
Air Temperature Control
Integration Time
Time value used when system is under integral air temperature control.
Air Temperature Control
Sensor
Sensor from which air temperature measurements will be used for cooling and heating
control.
Air Temperature Control Type Type of algorithm used to control the system's output air temperature.
Air Temperature Dead Band
Value that is divided evenly to form a temperature range above and below [Air
Temperature Set Point]. If measured air temperature is within this range, no heating or
cooling will occur.
Air Temperature Proportional
Band
Value that is divided evenly to form proportional temperature control bands above and
below [Air Temperature Set Point].
Air Temperature Set Point
Desired air temperature. This set point is dependent upon which sensor is selected for
control.
Airflow Sensor Issue Airflow sensor is disconnected or the signal is out of range.
Ambient Air Sensor Issue Ambient air sensor is disconnected or the signal is out of range.
Analog Input Reading Generic analog input reading (unitless).
Auto Restart Delay
If power is lost, the control will delay this amount of time after power is restored before
restarting the unit.
Aux Air Temp Device
Communication Lost
Communication with external auxiliary device providing an air temperature value has been
lost.
Back Draft Control Fan Speed Fan speed when in back draft control mode.
BMS Communications Timeout
Building Management System (or external monitoring system) has not communicated with
the system within the expected timeframe.
BMS Timeout Period
Timeframe within which the Building Management System (or external monitoring system)
must communicate with the system to avoid a timeout.
Calculated Next Maintenance
Month
Calculated month of the next scheduled maintenance. Used in conjunction with
[Calculated Next Maintenance Year].
Calculated Next Maintenance
Year
Calculated year of the next scheduled maintenance. Used in conjunction with [Calculated
Next Maintenance Month].