Hydraulic Connection; Electrical Connections; Initial Operation - Buhler Multiterminal Guía Rápida

Multiterminal

4.2 Hydraulic Connection

4.2.1 Connecting The Return Line
The return line connects via the G1" connections T1, T2 or T3.
Only the T1 is prepared for connection from the factory.
To use one of the alternative connections
• unscrew the sealing plug from the respective bore and
seal the connection T1 with it.
• Be sure the seal of the screw connection is clean.
NOTICE
Hazard type and source of the connection lines
Install all connection lines strain-free!.
4.2.2 Sample Port Arrangement (Optional)
The G1/8" sampling port with Minimess screw connection for
sampling from the tank is factory installed at the X1 connec-
tion. Please refer to Fig. 1 for the location of the connections.
The length of the sampling tube corresponds with the length
of the installed level switch.
Both the position of the sampling port and the length of the
sampling tube can be adapted to the situation on site. The
sampling ports must be selected to always be easy to access. If
necessary, proceed as follows:
• Unscrew the Minimess screw connection with sampling
tube from connection X1.
• Unscrew the sealing plug from connection X3 and seal
connection X1 with it.
• Trim the tube to the desired length. Carefully clean and
deburr the tube. Swarf can impair the function of the
level switch.
• Reinstall the sampling port in port X3.

4.2.3 Electrical Connections

The device must be installed by an authorised professional fa-
miliar with the safety requirements and risks. Be sure to ob-
serve the safety regulations and generally applicable rules of
technology relevant for the installation site.
Be sure to comply with the data specified in the data sheet,
operating instructions and type plate.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
With the multiterminal, the level- and temperature switch
and the contamination indicator require electrical commis-
sioning. Please refer to the respective (separate) operating in-
structions for the necessary data of the level/temperature
switch!
BX100012 ◦ 06/2021
4.2.3.1 Version With Contamination Indicator
DANGER
Electrical voltage
Electrocution hazard.
a) Disconnect the device from power supply.
b) Make sure that the equipment cannot be reconnected to
mains unintentionally.
c) The device must be opened by trained staff only.
d) Regard correct mains voltage.
The sensor connects with a cable using the M3 plug-in con-
nector. Please refer to Fig. 3 for the pin assignment. The max-
imum connection voltage is 250 VAC or 200 VDC.
The switching function of the electrical signal can be switched
from "NO contact" "NC contact" by turning the electrical top
180°.
Fig. 2: Pin assignment for type Mahle PIS 3085/2.2
Please refer to the appendix or the separate operating instruc-
tions for the technical data of the contamination indicator!
4.2.3.2 Versions With Filling Control (Optional)
For valve control, please refer to the included Flutec docu-
mentation. On the version with Bühler filling control, the 2/2-
way pilot valve comes with the control level switch fully wired.
In this case, wiring is not required.
4.2.3.3 Versions With Level/Temperature Switch
Please refer to the included operating and installation in-
structions for the level/temperature switch for the informa-
tion about connection the level switch.
5 Operation and control

5.1 Initial operation

Before startup, verify
• all electrical and hydraulic connections on the multiter-
minal are tight and show no signs of damage.
• the return filter has a filter element (the standard version
of the multiterminal comes without element).
Bühler Technologies GmbH 7