Vertiv | Liebert® CRV4 | User Manual 43
Electrical Installation
The description of terminals and ports shown in Figure 4-3
Terminals and Port Description
51, 24 Water-under-oor-sensor
37, 38 Remote On/ O
70, 71 Control cable of outdoor unit
75, 76 Common alarm
61, 62 Can communication
63, 64 Solenoid valve of liquid route
A2, B2, 12V, GND SIC Card
TB3 Rack sensor
The connection personnel must take anti-static measures before connecting the control cables
4.2.4. Water-under-oor Sensor
If a water-under-oor sensor is congured, connect one end of the sensor to terminal 51# and the other end
to common terminal 24#. Each unit can be connected with multiple sensors in parallel, but there would be only
one water-under-oor sensor alarm.
4.2.5. SIC Card
If a SIC card is congured, connect A#, B#, GND#, and 12# on the SIC card to the respective counterparts
on the terminal block. Either SIC card can be congured based on the user requirement. Refer to Appendix 1
Circuit Diagram for detailed information.
4.2.6. Rack Temperature Sensor
Each air-cooled unit can be connected with a maximum of 6 temperature sensors It is recommended that
the sensors be located in front of the heat-loads to achieve the most precise temperature. If the sensors are
connected in series (refer Figure 4-4), each temperature sensor monitors the temperature of air entering each
rack, and the read temperature value is used to control unit operation. The standard location of the sensor is
1.5 m height from the base of the unit. Therefore, the sensors should be placed in positions as shown in
Figure 4-4, or the devices cannot operate appropriately.
To Next Page
Loading...
Need help?
General
