User manual

Teamwork
Liebert
®
iCOM
®
82
4.3 Liebert Optimized Aisle Rack Sensor Installation
Each 2T sensor has two wires leaving the housing with temperature sensors on the end of each wire;
see Figure 68.
Figure 68 2T rack sensor
To install the Optimized Aisle Control 2T Sensor Array:
1. Set DIP switch settings for 2T sensors.
2. Terminate the final sensor on the CANbus link.
3. Install 2T sensors on racks to be monitored.
4. Install CANbus cable between 2T sensors.
5. Replace CANbus cable between the Liebert iCOM display and the Liebert iCOM main board in
electrical panel with grounded CANbus cable.
6. Install grounding ring connector in electrical panel and connect ground to CANbus cable.
Figure 69 Setting DIP switches for 2T sensors
4.3.1 Tools Required for Installation
• Small, non-conductive tool for setting control DIP switches
• Medium flat-head screw driver for opening electric panel protective dead-front.
• Cutting tool to trim cable ties
• Small Phillips-head screwdriver to open 2T housing
4.3.2 DIP Switch Settings
The individual 2T rack sensor must be given a unique address on the CANbus cable run to the
associated Liebert CW
™
unit. DIP switches are used to give the 2T sensor its unique address. It is
important to confirm that the DIP switches have been set correctly using the below table. Although it
is not required, it is recommended that the DIP switch sensor number settings correspond to the
number of 2T sensors on the CANbus run. For example, if there are only four 2T sensors used for a
particular Liebert CW unit then the individual DIP switch settings should correspond to address #1,
#2, #3 and #4. If the DIP switches are not set correctly, the control will not operate properly.
Sensors shown
may differ
depending on
equipment installed
2T Sensor Housing
(back)
Terminating
Jumper
2T Sensor Housing
(inside back)
Screws,
typically 3
DIP
switches