6.2.5 Connecting the Remote On/Off Device (Optional)
The remote on/off device is provided as an accessory. Connect the remote on/off device to terminals 37 and 38. These two
terminals have been connected with a jumper at the factory and you need to remove this jumper before connecting the
terminals with the remote on/off device.
NOTE: If the cable between the 37 and 38 terminals is removed and no remote on/off device is connected to the
terminals, the unit cannot be powered on.
6.2.6 Connecting Remote Temperature Sensors (Optional)
The remote temperature sensor is provided as an accessory. The unit can be connected with a maximum of 10 temperature
sensors. It is recommended to place the sensors in front of the heat loads, 1.5 m (4.9 ft) higher than the unit base.
NOTE: Only one remote temperature sensor is provided with the unit.
To connect remote temperature sensors:
1.
Insert the connector of the sensor to the RS485-1 port. Route the cable through the top or bottom of the unit.
Connect the second sensor to the first sensor.
2.
Fix the sensor on rack surface using the magnets provided in the kit. Do not fix it on an empty rack. Set the
address on the dialing switch on the sensor, according to the following table.
Sensor
1
2
3
4
5
6
ID
Remote temperature sensor 1
OFF
OFF
OFF
ON
OFF
OFF
10
Remote temperature sensor 2
OFF
OFF
OFF
ON
OFF
ON
11
Remote temperature sensor 3
OFF
OFF
OFF
ON
ON
OFF
12
Remote temperature sensor 4
OFF
OFF
OFF
ON
ON
ON
13
Remote temperature sensor 5
OFF
OFF
ON
OFF
OFF
OFF
20
Remote temperature sensor 6
OFF
OFF
ON
OFF
OFF
ON
21
Remote temperature sensor 7
OFF
OFF
ON
OFF
ON
OFF
22
Remote temperature sensor 8
OFF
OFF
ON
OFF
ON
ON
23
Remote temperature sensor 9
OFF
OFF
ON
ON
OFF
OFF
30
Remote temperature sensor 10
OFF
OFF
ON
ON
OFF
ON
31
Table 6.3 Address Settings of Remote Temperature Sensors
6.2.7 Connecting the Static Pressure Sensor (Customer-Supplied)
Connect the static pressure sensor to terminals 20MA and 12V. Set the range of the sensor on the HMI: press the menu
button, choose Maintenance > Static Pressure Settings > SP Sensor Range, and change the set point according to the sensor.
The default range is 0 - 250 Pa (0 - 1 inH2O).
6 Electrical Connections
45
Vertiv™ Liebert® CRV CRC30 and CRC60 Chilled Water Cooling System User Manual