Emerson Liebert CRV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 C R 0 2 0 R A 1 C 7 S D 1 8 1 1 E L 1 0 P A - Manual (Page 52)

Startup
Liebert ® CRV ™ 44
Figure 32 Adjust air-blocking plate
Instructions to adjust the air blocker:
1. Remove the three screws that attach the blocker plate to the display door.
2. Reattach the blocker plate to the other side of the display door or remove entirely.
9.5 Remote Rack Sensor Wiring
The Liebert CRV is capable of supporting up to ten (10) 2T remote rack temperature sensor housings.
It is recommended that one (1) 2T housing be attached to each rack the Liebert CRV is intended to
cool. The sensors provide feedback directly to the cooling unit to improve efficiency and performance.
Rack sensors help combat cooling problems related to recirculation air, uneven rack loading and air
distribution. The 2T rack sensors are intended for cold aisle use only.
While installing the rack sensors is optional, Emerson recommends that they be installed.
Installations with multiple Liebert CRV cooling units should be connected in a Unit-to-Unit (U2U)
Ethernet network to leverage all of the Liebert iCOM ® control benefits, see 11.3 Wiring a Liebert
iCOM ® U2U Network.
A sensor network can be extended at any time by connecting additional 2T sensors to the last 2T
sensor on the network. Sensors connect in a daisy chain fashion back to the cooling unit; individual
wires
from each sensor to the cooling unit are avoided.
There are two steps to setting up a remote rack sensor:
• The DIP switches of the remote rack sensor must be configured to have a unique ID
• The Liebert iCOM control must be set to use the remote rack sensor as either a controlling sensor
or as a reference sensor.
Perforated Supply
Air Opening Air Blocker Installed
Over Perforation
Attachment
Screws
FRONT VIEW
DPN001863
Pg. 2, Rev. 2
INSIDE DISPLAY DOOR