Power Supply Fö - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Installing the boiler
Electrical connections
Power supply to all accessories via heat source control unit
A
E
Fig. 15
Some accessories with direct power supply
A
E
Fig. 16
Heat source control unit
A
Extension kit for heating circuit with mixer M2
B
(control unit for weather-compensated operation
only)
Extension kit for heating circuit with mixer M3
C
(control unit for weather-compensated operation
only)
If the current flowing to the connected working parts
(e.g. circulation pumps) is higher than the fuse rating
of the relevant accessory, only use the output con-
cerned to control an on-site relay.
Accessories
Extension kit for heating circuit
with mixer
AM1 extension
EA1 extension
Power supply
fÖ
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and in
appliance damage.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
IEC 60364-4-41
■
VDE regulations
■
TAR medium voltage VDE-AR-N-4110
■
22
(cont.)
B C
B C
Internal fuse protec-
tion
2 A
4 A
2 A
D
D
AM1 extension or EA1 extension
D
On-site ON/OFF switch
E
Mains input
fÖ
A Power outlet
fÖ
Power outlet at the control unit
lH
aVG KM BUS connection
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
and 42 V/230 V~ cables separately.
>
Only strip the minimum of insulation from
■
cables as close as possible to the terminals
and bundle tightly to the corresponding termi-
nals.
■ Secure cables with cable ties.
■ 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 full isolation. This isolator must be
fitted in the permanent electrical installation, in line
with the installation requirements.
In addition we recommend the installation of an
AC/DC-sensitive RCD (FI Class B
(fault) currents that can arise from energy efficient
equipment.
Connect the power cable to the electricity supply
■
using a fixed connection.
) for DC