Fig. 6-4: Speed-controlled pump
Fig. 6-5: Special function - pump (with supply extension 230
V)
Fig. 6-6: Special function - changeover valve with three-point
controlling
Fig. 6-7: Special function - burner
Connect system components
Connect the system components according to the
terminal assignment of the configuration.
6.1 Potential equalization and
overvoltage protection
Recommendations for potential equalization and
overvoltage protection
On-site, properly qualified specialist personnel
(electrician) is responsible for a technically
correct earthing concept and proper potential equaliza-
tion.
In order to avoid electrical potential differentials
between contactable and conductive parts, main
potential equalization will be necessary to protect
against damage caused by electrical shock.
Main potential equalization
All conductive parts within a building (e.g. metal pipes)
must be connected to the foundation ground through
potential equalization bars and potential equalization
cables (minimum diameter for copper: 6 mm²).
Observe national requirements for detailed spec-
ifications and minimum cross-sections of the
lines.
Potential equalization between buildings
Depending on local conditions and the characteristics
of a building's potential equalization, equalization
current may flow between the buildings through the
shielding of the CAN bus connection.
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