6 720 645 347 (2010/09)
16
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Installation (for contractors only)
3.2 Electrical connections
B
Use electrical cable according to local codes
and requirements.
B
Route all LV cables/leads separately from
cables carrying 220 to 240 V or 380 to 415 V
to avoid inductive interference (minimum
separation 100 mm).
B
In case of external inductive interference,
shield the cables.
This ensures that the cables are shielded from
external interference (e.g. heavy current
cables, overhead wires, transformer stations,
radio and television set, amateur radio
stations, microwave ovens etc).
3.2.1 Connecting the BUS link
Permissible lead lengths from the BUS-enabled
Heatronic 3 to the controller:
B
Connect the controller to a heating appliance
with BUS-enabled Heatronic 3.
Fig. 9
Controller connected to BUS-enabled
Heatronic 3.
Fig. 10
BUS links connected via branch box (A)
Lead length
Cross-section
≤
80 m
0.40 mm
2
≤
100 m
0.50 mm
2
≤
150 m
0.75 mm
2
≤
200 m
1.00 mm
2
≤
300 m
1.50 mm
2
Tab. 6
If the BUS links feature different
cross-sections:
B
Connect BUS links via a branch box.
FR 100
FR 110
1
2
4
B
B
6 720 613 058-05.1R
ST 19
Heatronic 3
A
F
B
B
B
2
B
B
A
B
2
B
B
B
2
B
B
6 720 612 220-08.1J
100 mm
100 mm
