Low voltage plugs
!
Outside temperature sensor
(only for weather-compensated
control units).
Terminals X3.1 - X3.2.
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 balco-
nies 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)
Terminals X3.4 - X3.5.
&
Solar temperature sensor
Terminals X3.8 - X3.9.
NOTE: If no solar panels are
fitted to the appliance the solar
sensor has to be connected
otherwise the appliance is going
into an error code. Also switch
relay 1 off (see page 64 Manual
mode 0).
aVG
KM BUS subscriber (acces-
sories)
Terminals X3.6 - X3.7.
&
Vitotrol 200 or 300 remote con-
trol
&
Vitocom 100
&
Extension kit for a heating cir-
cuit with mixer
&
Vitosolic
&
External extension H1 or H2
Refit the cover to the wiring chamber
(see page 18).
Electrical connections
(cont.)
20
Installation sequence
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