Huber MPC Minichiller 280, Manual

Page: 31 / 60

Commissioning
Chapter 2 OPERATION MANUAL
V2.4.0en/09.08.21//1.30
Minichiller®
31
2.8.4 Connecting the functional earth
PROCEDURE

If required, connect the temperature control unit’s
>Functional ground terminal<
[87] to the
building’s grounding point. Use a ground strap for this purpose. For the exact position and thread
size please refer to the wiring diagram. → From page 59, section
»Annex«
.
2.9 Connecting externally closed application
Observe the wiring diagram. → From page 59, section »Annex« .
2.9.1 Connecting an externally closed application
Overpressure in the application (e.g. > 0.5 bar (g) with glass apparatus)
MATERIAL DAMAGE TO THE APPLICATION

Provide an overpressure protective device to prevent damage to the application.

Do not install valves/quick-release couplings in the feed/discharge lines from the temperature
control unit to the application and from the application to the temperature control unit.

If valves/quick-release couplings are required:

Install burst disks on the application itself (at the feed and discharge lines).

Install a bypass upstream of the valves/quick-release couplings for the application.

Matching accessories (e.g. bypasses to reduce pressure) can be found in the Huber catalog.
To enable your application to be operated correctly and eliminate air bubbles from the system, you
must ensure that the >Circulation flow< [1] connection from the temperature control unit is at-
tached to the lower connection point of the application and the
>Circulation return<
[2] into the
temperature control unit is attached to the higher connection point of the application.
PROCEDURE

Remove the screw plugs from the >Circulation flow< [1] and >Circulation return< [2] connec-
tions.

Then connect your application to the temperature control unit using suitable thermal fluid hoses.
Observe the table with the wrench sizes. → Page 28, section »Wrench sizes and torques« .

Check the connections for leaks.
2.10 Connecting to the power supply
Based on local circumstances, it may be that you need to use an alternative power cable instead of
the supplied original power cable. Do not use a power cable that is longer than 3 m to be able to
disconnect the temperature control unit at any time from the mains. Have the mains cable only
replaced by a qualified electrician.
2.10.1 Connection using socket with protective earth (PE)
Connecting to a power socket without protective earth (PE)
MORTAL DANGER FROM ELECTRIC SHOCK

Always connect the temperature control unit to safety sockets (PE).
Example: Connecting
an externally closed
application