Viessmann VITODENS 300 WB3A, Service Instructions Manual

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C
Vitotrol 100 UTD (only for control
units operating with a constant
temperature)
D
Vitotrol 100 UTA (only for control
units operating with a constant
temperature)
Plug 230 V~
fÖ
Power supply
& Never interchange cores L1 and
N.
& Install an isolator in the mains
supply line which simulta-
neously separates all non-
earthed conductors from the
mains with at least 3 mm contact
separation.
& Max. fuse rating 16 A.
sÖ
Heating circuit pump or boiler cir-
cuit pump
lH
& Mains supply - accessories
(230 V ~ 50 Hz). Where the boi-
ler is installed in a bathroom or
shower room, the mains supply
of accessories outside the wet
area must not be connected to
the control unit. The power sup-
ply connection for accessories
can be made immediately at the
control unit, if the boiler is
installed outside damp areas.
This connection is directly con-
trolled with the system ON/OFF
switch (max. 4 A).
& Vitotrol 100 UTA
& Vitotrol 100 UTD
Low voltage plug
!
Outside temperature sensor
(only for weather-compensated
mode)
Installation
& North or northwestern wall, 2
to 2.5 m above ground level. In
multi-storey buildings, in the
upper half of the second floor
& Not above windows, doors or
ventilation outlets
& Not immediately below balcony
or gutter
& Do not render over
& Two core cable with a maxi-
mum length of 35 m and a
cross-section of 1.5 mm
2
?
Flow temperature sensor for low
loss header (accessories)
%
Cylinder temperature sensor
(part of the DHW cylinder con-
nection set).
Connection to cables with plugs
outside of the control unit.
aVG
KM BUS user (accessory)
& Vitotrol 200 or 300 remote con-
trol
& Vitocom 100
& Extension kit for one heating
circuit with mixer
& Vitosolic
& External extension H1 or H2
Electrical connections
(cont.)
12
58
62
570
GB