Huber MPC Minichiller 280, Manual

Page: 51 / 60

Service/maintenance
Chapter 7 OPERATION MANUAL
V2.4.0en/09.08.21//1.30
Minichiller®
51
During an active circulation, the thermal fluid circuit is shut off by shut-off valves
MATERIAL DAMAGE TO THE CIRCULATING PUMPS INSTALLED IN THE TEMPERATURE CONTROL UNIT

Do not close the thermal fluid circuit during an active circulation by means of shut-off valves.

Warm the thermal fluid to room temperature before stopping the circulation.
7.3.1 Thermal fluid replacement
Mixing different thermofluids in a thermal fluid circuit
PROPERTY DAMAGE

Do
not
mix different types of thermofluid (such as mineral oil, silicone oil, synthetic oil, water,
etc.) in a thermofluid circuit.

The thermal fluid circuit
must
be rinsed when changing from one type of thermal fluid to an-
other. No residues of the previous type of thermal fluid may remain in the thermal fluid circuit.
7.3.1.1 Externally closed application
Observe the following when replacing the thermal fluid: → Page 39, section »Filling and venting
externally closed application« . The draining and filling operations are described in this section.
7.3.2 Rinsing the thermal fluid circuit
Setpoint and overtemperature protection are not adjusted to the thermofluid
MORTAL DANGER FROM FIRE

The cut-out value of the overtemperature protection must be adapted to the thermofluid. Set the
cut-out value of the overtemperature protection 25 K below the fire point of the thermofluid.

The setpoint set during rinsing must be adjusted to the thermofluid used.
Non-compliance with the safety data sheet for the thermal fluid to be used
INJURIES

Risk of injury to the eyes, skin, respiratory tract.

The safety data sheet for the thermal fluid to be used must be read prior to using it and its
content must be respected.

Observe the local regulations/work instructions.

Wear your personal protective equipment (e.g. temperature-resistant safety gloves, safety
goggles, safety footwear).

Danger of slipping because floor and work area are contaminated. Clean the workplace; ob-
serve the proper disposal of thermal fluid and aids. → Page 15, section
»Proper disposal of re-
sources and consumables«
.
Mixing different thermofluids in a thermal fluid circuit
PROPERTY DAMAGE

Do not mix different types of thermofluid (such as mineral oil, silicone oil, synthetic oil, water,
etc.) in a thermofluid circuit.

The thermal fluid circuit must be rinsed when changing from one type of thermal fluid to an-
other. No residues of the previous type of thermal fluid may remain in the thermal fluid circuit.
The inner components of the temperature control unit must be dried out Need to avoid boiling
retardation during future uses (e.g. use of a silicone oil at temperatures above about 100 °C).
Example: Connecting a
short circuit hose