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2
SYMBOLS AND UNITS USED
The safety instructions contained in these operating instructions are labelled with the following symbols:
Instructions attached directly to the heating circuit filling station, such as
/
Direction of flow,
/
Type label,
/
Cleaning information,
must be observed without fail and maintained so that they are always legible.
The following units and terms which do not form part of the SI (Système International d’Unités) system are
used:
Attention!
This symbol refers to a point which must be observed to ensure reliable operation and
safety.
Note!
This symbol highlights user tips and other useful information.
Warning!
This symbol flags up an electrical voltage warning.
Unit:
This symbol indicates torques specified by the manufacturer.
Unit
Conversion
bar
1 bar = 10
5
Pa = 0.1 N/mm
2
¾"
DN 20
°dH
1 °dH = 0.1785 mmol/l alkaline earth ions
(hardness producing ions)