5.
Unit
Description
All units fulfill the requirements of safety class
2
according to
DIN
12879
and are thus suitable for unsupervised continu-
ous operation.
The circulator pump motor is protected against thermal over-
loading.
All
temperature sensors are permanently monitored
according
to
break or short circuit. The cooling machine is
integrated into the general safety circuit.
The control of the preselected temperature
is
carried out
automatically via the Thermo Haake ~uzz~~tar@ control.
5.1
Safety features
The comprehensive safety system is designed on the princi-
ple of the concept of the "single fault"
(EN
61
01 0).
This as-
sumes that two separate faults do not occur simultaneously.
This system therefore offers protection against
one
(single)
fault. This one fault will effectively occur automatically
...
if you do not read this manual,
if you do not correctly set the excess temperature
protection, i.e. the safety reserves have already been
used up.
Such faults can include e.g.:
Fault in the temperature control unit:
=.
Excess temperature poss. fire danger
Leakage in the liquid circuit
or
Evaporation of heat transfer liquid:
=.
Low liquid level
-
poss. fire danger
Pump blocked
or
Heat transfer liquid
is
too highly viscous:
*
Motor overheating
-
poss. fire danger
Or also:
Excess temperature protection level not correctly set:
=+
poss. fire danger
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