15
■ Install an isolator in the power cable
which simultaneously separates all
non-earthed conductors from the
mains with at least 3 mm contact sep-
aration.
■ Wire the power supply with a neutral
conductor.
■ Connect water pipes to the equipoten-
tial bonding of the building in question.
■ Max. fuse rating 16 A
■ Recommended power cable:
NYM-J 3 x 1.5 mm
2
, max. fuse rating
16 A, 230 V~, 50 Hz
Power supply for accessories (on site)
Where the boiler is sited in a wet area,
the power supply for accessories must
not be connected at the control unit.
Where the boiler is sited outside wet
areas, the power supply for accessories
can be connected at the control unit. This
connection is controlled directly with the
control unit ON/OFF switch (max. 1 A)
Recommended power cable:
NYM with the required number of con-
ductors for the external connections
Accessories:
■ Vitotrol 100, type RT
■ Vitotrol 100, type UTA
■ Vitotrol 100, type UTDB
■ Vitotrol 100, type UTDB-RF
Connection of accessories
Accessory installation instruc-
tions
Note
When connecting a Vitotrol 100, remove
the jumper between "1" and "L".
Routing connecting cables
!
Please note
If connecting cables touch hot
components they will be dam-
aged.
When routing and securing
cables/leads on site, ensure that
the maximum permissible tem-
perature for these cables/leads is
not exceeded.
Note
Step 1: Secure power cable to the con-
trol unit support with cable ties.
Installation sequence
Electrical connections
(cont.)
5848 649 GB
Installation
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