Electrical Connections - Bühler technologies RC 1.1 Notice De Montage

RC 1.1, RC 1.2+
A peristaltic pump may also be installed away from the cooler.
A mounting angle is available for mounting the pump directly
below the cooler. Mounts for securing the angle directly to the
cooler are designated.
4.2.5 Connecting the heat exchanger
The gas inputs are marked in red.
On glass heat exchangers the correct position of the seal is im-
portant when connecting the gas lines (see image). The seal
consists of a silicone ring with a PTFE sleeve. The PTFE side
must face the glass thread.
Glass
PTFE

4.3 Electrical connections

The operator must install an external separator for the device
which is clearly assigned to this device.
This separator
• must be located near the device,
• must be easy for the operator to reach,
• must comply with IEC 60947-1 and IEC 60947-3,
• must separate all live conductors and the status output,
and
• must not be attached to the power feed.
• the mains supply of the device must be fused according to
the specifications under technical data.
WARNING
Hazardous electrical voltage
The device must be installed by trained staff only.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
WARNING
High voltage
Damage to the device in case of insulation testing
Do not proceed insulation tests with high voltage to the
device as a whole!
BX450028 ◦ 09/2021
Insulation test
The device is equipped with extensive EMC protection. If insu-
lation tests are carried out the electronic filter devices will be
damaged. All necessary tests have been carried out for all con-
cerned groups of components at the factory (test voltage 1 kV
or 1.5 kV respectively, depending on the device).
If you wish to carry out the insulation test by yourself, please
test only separate groups of components.
Disconnect the compressor, the fan, the heating or the peri-
staltic pumps, respectively, and then carry out the insulation
tests.
Plug connection
This device has one EN 175301-803 plug each for the power
supply and the signal output. If the lead is connected cor-
rectly, these cannot be confused. Therefore please be sure to
correctly reassemble the plugs after connecting the wires. Be-
low you will find the pin assignments, with the numbers cor-
responding to those on the plugs:
The supply line cross-sections must be suitable for the rated
current. Use a maximum line cross-section of 1.5 mm²
(AWG 16) and a cable diameter of 8 - 10 mm (0.31 - 0.39 inch).
Shielded signal lines are required to connect the analog out-
put or the digital interface.
Plug numbering
Alarm contact S2 *
*
Digital output S4
1 - not used
2 - RS485 A
3 - GND/Common
4 - RS485 B
5 - Shielding
Fig. 1: Cooler connection
* When using an alarm contact connect to ≥ 33 V AC or
≥ 70 V DC PE voltage.
The clamping area has a diameter of 8-10 mm.
Electric supply S1
Analogue output S3
1 - N/C
2 - N/C
3 - GND
4 - 4-20 mA out
5 - shield
Bühler Technologies GmbH 13