Commissioning
Chapter 2
OPERATION MANUAL
V2.2.0en/09.08.21//17.12
Unichiller® eo Desktop
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 85, section
2.9
Connecting an externally open application
Observe the wiring diagram.
→
2.9.1
Connecting an externally open application (bath)
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 attached to the
lower connection point [B] of the application and the
>Circulation return<
[2] connection is attached to
the higher connection point [A] of the application. Make sure that the connection point [B] of the applica-
tion is at the same level or slightly higher than the connection
>Circulation return<
[2].
PROCEDURE
Remove the screw plugs from the
>Circulation flow<
[1] and
>Circulation return<
[2] connections.
Then connect your application to the temperature control unit using suitable thermal fluid hoses.
Observe the table with the wrench sizes.
→
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).
Damaged power cable/power cable connection
MORTAL DANGER FROM ELECTRIC SHOCK
Do not start up the temperature control unit.
Isolate the temperature control unit from the power supply.
Have the power supply cable/power supply connection replaced and inspected by an electrician.
Do not use a power cable that is longer than
3 m
.
Incorrect power supply connection
DAMAGE TO THE TEMPERATURE CONTROL UNIT
Your building's existing power supply voltage and frequency must match the data provided on
the rating plate of the temperature control unit.
Example: Connecting
an externally open
application
