Huber MPC Minichiller 280, Manual

Page: 52 / 60

Service/maintenance
OPERATION MANUAL Chapter 7
Minichiller®
V2.4.0en/09.08.21//1.30
52
7.3.2.1 Rinsing a thermofluid circuit with >Sight glass< [23]
PROCEDURE

Drain the temperature control unit. → Page 42, section »Draining with >Sight glass< [23]« .
Residual thermal fluid can remain in the pump chamber and the internal lines after draining. Leave
the temperature control unit with open valves for a while.

Check the fill level in the collecting container. Observe the proper disposal of thermal fluid.
→ Page 15, section »Proper disposal of resources and consumables« .

Re-fit the knurled screw to the >Residues drain< [10] (if present).

Re-fit the knurled screw to the >Drain< [8].

Connect the >Circulation flow< [1] with the >Circulation return< [2] at the temperature control
unit using a bypass hose.
Perform the following steps without attaching a short circuit hose, if the application used by you
(externally closed) is also dirty. In this case, leave your externally closed application connected to
the temperature control unit. This rinses the temperature control unit and your application at the
same time.

Fill the system (minimum fill level) with the thermal fluid you wish to use. → Page 40, section
»Filling and venting with >Sight glass< [23]« .

Vent the system. → Page 40, section »Filling and venting with >Sight glass< [23]« .

Adjust the setpoint and the cut-out value of the overtemperature protection to the thermal
fluid used. → Page 36, section »Set/change setpoint« and → Page 37, section »Setting the over-
temperature (OT) protection« .

Start the circulation . The length of rinsing depends on the level of soiling.

Stop the circulation .

Drain the temperature control unit. → Page 42, section »Draining with >Sight glass< [23]« .

Repeat the steps “Filling”, “Venting”, “Start/Stop circulation” and “Draining” until the drained
thermal fluid remains clear.

Remove the bypass hose after completely draining the temperature control unit.
Leave an application connected, if you have simultaneously rinsed a used application (externally
closed).

Leave the >Drain< [8] and >Residues drain< [10] (if any) open for a while to allow the thermal
fluid to evaporate in the temperature control unit.

Close the >Drain< [8] and >Residues drain< [10] (if any) once the thermal fluid has evaporated.

Remove the collecting container. Follow the instructions for the proper disposal. → Page 15,
section »Proper disposal of resources and consumables« .

Re-connect your application. (Only if you have rinsed the thermal fluid circuit using a bypass hose.)

Fill the temperature control unit with thermal fluid. → Page 40, section »Filling and venting with
>Sight glass< [23]« .

Vent the temperature control unit. → Page 40, section »Filling and venting with >Sight glass< [23]« .

Restart the temperature control unit in normal mode.
7.3.2.2 Rinsing the thermofluid circuit with >Level indicator and drain< [38]
PROCEDURE

Drain the temperature control unit. → Page 43, section
»Draining with >Level indicator and
drain< [38]«
.
Residual thermal fluid can remain in the pump chamber and in the internal lines after draining.
Therefore leave the temperature control unit open for a while.

Check the fill level in the collecting container. Follow the instructions for the disposal of thermal
fluid. → Page 15, section
»Proper disposal of resources and consumables«
.

Reinsert the hose into the
>Level indicator and drain<
[38].

Connect the
>Circulation flow<
[1] with the
>Circulation return<
[2] at the temperature control
unit using a bypass hose.