Viessmann Vitoladens 300-C Installation Instructions Manual page 24

Summary of electrical connections
230 V~ plugs
fÖ Power supply
& Remove any existing individual
cores.
Danger
Incorrect core termina-
tions can cause severe
injuries and damage to
the equipment.
Take care not to inter-
change cores "L1" and
"N".
& Install an isolator in the power
supply line that simultaneously
isolates all non-earthed conduc-
tors from the mains with at least
3 mm contact separation.
Remove the existing cable
grommet when using larger
cross-sections (up to 714 mm).
Secure the cable with cable
grommet F (see page 20) inte-
grated into the casing base.
& Max. fuse rating 16 A.
Pumps and external connections
Connection
sÖ
Heating circuit pump A1
sA
Cylinder primary pump
sK
DHW circulation pump
gÖ
Central fault message
aVD
External blocking/demand
aVF
0-10 V input
*1
Total max. 4 A~.
24
(cont.)
Sensors and KM BUS
!
Outside temperature sensor (in
the control unit pack)
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
2
1.5 mm
%
Cylinder temperature sensor (in
the control unit pack)
Control unit connecting cable
with two individual plugs.
aVG KM BUS subscriber (acces-
sories)
& Vitotrol 200 or 300 remote con-
trol
& Vitocom 100
& Extension kit for a heating cir-
cuit with mixer
& Vitosolic
Rated relay output load breaking
capacity at 230 V∼
* 1
2 (1) A∼
* 1
2 (1) A∼
* 1
2 (1) A∼
* 1
0.4 (0.2) A∼