2
Filling
19
10.2 Filling with heat transfer liquid
Filling level of the interior bath:
max. up to 2.0 cm below the cover plate,
min. up to 5.0 cm below the cover plate.
External systems included within the circulating circuit have
to be filled with the same heat transfer liquid in order to avoid
too much liquid being drawn from the internal bath.
The bath level should be checked when the preset tem-
perature has been reached!
Quite often closed external systems cannot be prefilled as
suggested. In this case the internal bath of the unit has to be
filled to the max. level. After starting the unit, the pump will
feed the necessary liquid to the external system. Should the
demand be higher than the volume difference between high
and low, the low liquid level sensor will be activated and the
pump switched off.
In this case:
1
Replenish the liquid,
2
Reset the safety circuit,
Depress the key 2 (at the front)
⇒
The unit starts up again
3
Repeat this action if necessary.
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