28
fÖ
Power supply, on output extension SA 169
Danger
Incorrect core assignment can result in seri-
ous injury and damage to the appliance.
Take care not to interchange wires "L1" and
"N".
■
Implement the mains connection as a permanent
connection (3-core cable NYM). If the mains con-
nection is made with a flexible power cable, it
must be ensured that the live conductors 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.
■
Install an isolator in the power cable to provide
omnipolar separation from the mains for all
active conductors, corresponding to overvoltage
category III (3 mm) for full isolation. The isolator
must be fitted in the permanent electrical installa-
tion, in line with installation requirements.
■
We additionally recommend installing an AC/DC-
sensitive RCD (RCD class B
) for DC
(fault) currents that can occur with energy effi-
cient equipment.
■
Maximum fuse rating 16 A.
lH
External demand
External blocking
Power supply accessories (230 V~ 50 Hz). Where
the boiler is sited in a wet room, accessories out-
side the wet area must not be connected to the
power supply at the control unit.
If the boiler is not sited in a wet room, the power
supply for accessories can be connected at the
control unit. This connection is directly controlled
with the system ON/OFF switch (max. 6 A).
LV plug
!
Outside temperature sensor
Installation:
■
North or north-westerly wall, 2 to 2.5 m
above ground level; on multi storey buildings,
in the upper half of the second floor
■
Not above windows, doors or vents
■
Not immediately below balconies or gutters
■
Never render over.
■
2-core cable, max. 35 m long with a cable
cross-section of 1.5 mm
2
%
Cylinder temperature sensor
aVG
KM-BUS subscriber (accessories), an addi-
tional KM-BUS subscriber requires a distributor
■
Vitotrol 200-A or 300-A remote control
■
Mixer extension kit
■
Solar control module, type SM1
■
EA1 extension
■
Wireless base station
■
AM1 extension
0-10 V Connection, speed control, pump output 20
Circulation pump at plug
sÖ
A
1~
M
sÖ
?
0 - 10 V
Fig. 33
A
High efficiency circulation pump, speed-controlled
via 0 - 10 V control voltage
If variable speed control is possible, insert 0 - 10 V
plug-in connection at X4.
Rated current
2(1) A~
Rated voltage
230 V ~
Connecting external cables
(cont.)
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