Power Supply Fö - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Installation sequence
Electrical connections
Mains input
fÖ
PlusBus
jF
Note
PlusBus system length max. 50 m for 0.34 mm
cross-section and unshielded cable.
If the current flowing to the connected working parts
(e.g. circulation pumps) is higher than the fuse rating
of the accessory: Only use the output concerned to
control an on-site relay.
Note
Use addressing for S1 rotary selector. See also the
information in chapter "Notes on connecting PlusBus
subscribers".
Accessories
EM-M1, EM-MX mixer exten-
sion kit
EM-EA1 extension
EM-S1 extension (not for
Vitodens 111)
Power supply
fÖ
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and dam-
age to the appliance.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
IEC 60364-4-41
■
■ IEEE Wiring Regulation; BS 7671:2018
■ Connection conditions of the local grid opera-
tor
Install an isolator in the power cable to provide
■
omnipolar separation from the mains for all active
conductors, corresponding to overvoltage cate-
gory III (3 mm) for complete isolation. The isolator
must be fitted in the permanent electrical installation,
in line with installation requirements.
We also recommend installing a pulse current-sensi-
tive RCD (RCD class A
Connect the power cable to the electricity supply
■
using a fixed connection.
28
(cont.)
2 cable
Internal fuse protec-
tion
2 A
2 A
2 A
).
Danger
Incorrect wiring can lead to serious injury from
electrical current and result in appliance dam-
age.
■ Route extra low voltage (ELV) leads < 42 V
separately from cables
■ Strip as little of the insulation as possible,
directly before the terminals, and bundle close
to the corresponding terminals.
Secure cables/leads with cable ties.
■
If the power supply to the appliance is connected
■
with a flexible power cable, ensure that the live con-
ductors are pulled taut before the earth conductor in
the event of strain relief failure. The length of the
earth conductor wire will depend on the design.
■ Max. fuse rating 16 A.
Danger
The absence of system component earthing can
lead to serious injury from electric current if an
electrical fault occurs.
The appliance and pipework must be connected
to the equipotential bonding of the building.
42 V/230 V~.
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