B Heating circuit pump or boiler cir-
cuit pump
Only with variable speed heating
circuit pump:
Insert plug aVG into X4.
C Vitotrol 100 UTD (only for con-
stant temperature control units)
Remove jumper when making this
connection.
D Vitotrol 100 UTA (only for constant
temperature control units)
Remove jumper when making this
connection.
230 V~ plugs
sÖ Circulation pump
fÖ Power supply
Danger
Incorrect core terminations
can cause severe injuries
and damage to the equip ment.
Take care no t to interchange wires "L1" and "N".
&
Install an isolator in the power
supply line that simultaneously
isolates all non-earthed co nductors from the mains with at least
3 mm contact separation.
&
Max. fuse rating 16 A.
lH
&
Power supply a ccessories (230
V/50 Hz). Where the boiler is
installed in a wet area, the co nnection of accessories to the
power supply must not be carried out at the control unit. The
power supply connection for
accessories can be made imme diately at the control unit, if the
boiler is installed outside wet
areas. This connection is
directly controlled with the system ON/OFF switch (max. 3 A).
&
Vitotrol 100 UTA
&
Vitotrol 100 UTD
Low voltage plugs
! Outside temperature sensor
(only for weather-compensated
control units).
Installation:
&
North or north-western 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 balconies or gutters
&
Never render over
&
2-core lead, max. 35 m length
with a cross-section of
1.5 mm
2
? Flow temperature sensor for low
loss header (accessories)
% Cylinder temperature sensor
(part of the DHW cylinder connection set).
Connection to cables with plugs
outside of the control unit.
aVG KM BUS subscrib er (acces-
sories)
&
Vitotrol 200 or 300 remote control
&
Vitocom 1 00
&
Extension kit for a heating circuit with mixer
&
Vitosolic
&
External extension H1 or H2
Electrical connections (cont.)
14
5592 989 GB