Huber KISS 1 Series, Operation Manual

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Service/maintenance
Chapter 7 OPERATION MANUAL
V1.2.0en/11.12.20//0.3.1
KISS Immersion Circulator
51
7.4 Thermal fluid inspection, replacement and circuit cleaning
The illustration “connection diagram” can be found on page 58 in section »Annex« .
Extremely hot / cold surfaces, connections and thermal fluids
BURNS/FREEZING OF LIMBS

Surfaces, connections and tempered thermal fluids can be extremely hot or cold depending on
the operating mode.

Avoid direct contact with surfaces, connections and thermal fluids!

Wear your personnel protective equipment (e.g. temperature-resistant safety gloves, safety goggles).
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.
7.4.1 Thermal fluid inspection
Thermal fluid is not inspected on a regular basis
BURNS DUE TO REDUCED BOILING POINT

Regularly check your thermal fluid whether it meets the specifications in the safety data sheet.
Thermal fluid is not inspected on a regular basis
DAMAGE TO THE HEAT EXCHANGER AND/OR ELECTROMECHANICAL PARTS.

Regularly check your thermal fluid whether it meets the specifications in the safety data sheet.
Oxidation
Oxidation ages the thermal fluid and change its characteristics (e.g. a reduced boiling point). When
controlling high temperatures, a reduced boiling point may cause overflow of very hot thermal
fluids. It may cause serious burns of the limbs.
Hygroscopy
When continuously thermoregulating below room temperature, hygroscopy causes the thermal
fluid to accumulate water in the course of time. Such a liquid mixture causes the evaporator to
burst when thermoregulating in the minus range. This is caused by the water in the liquid mixture,
which forms ice crystals on the evaporator. When thermoregulating high temperatures with such a
liquid mixture, the boiling point is reduced. When controlling high temperatures, a reduced boiling
point may cause overflow of very hot thermal fluids. It may cause serious burns of the limbs.
Hygroscopy can change the mixing ratio of a water-ethylene-glycol mixture.
7.4.2 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 work station and
follow the instructions for the disposal of thermal fluid and material on page 15 in section
»Proper disposal of resources and consumables« .