Liebert PW017 User Manual

6.2 Supply Temperature Sensor
The Liebert iCOM™ is equipped with a supply (discharge) air temperature sensor. The sensor can be used
to provide a consistent supply-air temperature by adjusting the compressor capacity or chilled-water
valve position, or it can be for monitoring purposes only.
The supply sensor must be installed 5 to15 ft (1.5to4.5m) from the unit, in the discharge air, to provide an
accurate reading when iCOM is set-up for supply-air temperature monitoring, supply control, or supply
limit.
A 50ft (15m) extension cable is available if the sensor must be farther than 15ft (4.5m) from the Liebert
iCOM controller.
See the Liebert iCOM user manuals, SL-18841 and SL-18835, for more information on supply-air-
temperature monitoring, control, or limit setup. The manuals are available at https://www.vertivco.com/en-
us/support/.
6.3 Return Air Sensor
6.3.1 Internal Temperature/Humidity Sensor
The unit is supplied with a return-air sensor to measure return-air temperature and humidity conditions.
Liebert iCOM uses this information for many critical unit-control and system-monitoring functions. The
sensor is factory-installed internal to the unit in the return air stream.
6.3.2 Remote Temperature/Humidity Sensor
The unit can be configured for a remote temperature/humidity sensor, which is shipped loose for field
mounting. Sensor wire must be plugged into P66 on the iCOM control board, which is mounted inside the
unit control-and-monitoring section. Wire-length options are 30ft (9m), 60ft (18m), 90ft (27m), 120ft
(36m), or 150ft (45m). The internal return-air temperature/humidity sensor is omitted from the unit.
6.4 2T Wired Remote Sensors
Up to 10 remote-sensor modules, installed in the monitored racks and connected to the cooling unit,
provide control and reference input to iCOM and building-management systems. Using remote, rack
sensors combats cooling problems related to recirculation air, uneven rack loading, and air distribution.
The sensor array consists of 2T sensors that each have two temperature probes on a 6-ft (1.8-m) probe-
connection cable.
Refer to the installation instructions included with the sensors or the hardware-installation section of the
Liebert iCOM user's manual, SL-18835, included with the system, for detailed installation and operating
configuration of the 2Track temperature sensors.
Figure 6.2 on the facing page shows the a typical sensor installation on racks that share a common cold
aisle and a single CRAC unit.
Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide | 54

Liebert PW017 Specifications

General

Brand	Liebert
Model	PW017
Category	Control Unit
Language	English