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4 Before installation
4.6
Requirements for the electrical connections
Tab.19
PCB connectors
Wire cross section
solid wire: 0.14 – 4.0 mm² (AWG 26 – 12)
stranded wire: 0.14 – 2.5 mm² (AWG 26 – 14)
stranded wire with ferrule: 0.25 – 2.5 mm² (AWG 24 – 14)
4.7
Water quality and water treatment
20
Condensation
Direct connection of the flue gas outlet to structural ducts is not
permitted because of condensation.
If condensate from a plastic or stainless steel pipe section can flow back
to an aluminium part in the flue gas outlet, this condensate must be
discharged via a trap before it reaches the aluminium.
Newly installed aluminium flue gas pipes with longer lengths can
produce relatively larger quantities of corrosion products. Also casting
sand and processing metal chips from new boilers can fill the boiler trap
on short term after installation. Check and clean the trap more often for
these reasons.
Establish the electrical connections in accordance with all current local
and national regulations and standards.
Electrical connections must only be made by qualified installers, and
only while the power supply is disconnected.
The appliance is completely pre-wired. Never change the internal
connections of the control panel.
Always connect the appliance to a well-earthed installation.
The wiring must comply with the instructions in the electrical diagrams.
Follow the recommendations in this manual.
Separate the sensor cables from the 230 V cables
Make sure the following requirements are met when connecting the cables
to the CB and SCB connectors:
The quality of the heating water must comply with the limit values in our
Water quality instructions. The guidelines in these instructions must be
followed at all times. In many cases, the boiler and central heating system
can be filled with normal tap water and water treatment will not be
necessary.
Stripping length
Tightening torque
8 mm
0.5 N⋅m
7837114 - v.01 - 10012023
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