Viessmann Vitodens 100 WB1 Technical Data Manual page 14

Control unit for weather-compensated operation
Adjustment of heating curves (slope and
shift)
The control unit regulates the boiler water
temperature (= flow temperature of the
heating circuit without mixer) and the
flow temperature of the heating circuit
with mixer (in conjunction with the exten
sion kit for a heating circuit with mixer) in
relation to the outdoor temperature.
The flow temperature that is required to
achieve a given room temperature de
pends on the heating system and the
thermal insulation of the building heated.
The adjustment of the two heating curves
is used to match the boiler water tem
perature and the flow temperature to
these conditions.
Heating curves:
Heating curve slope
Outdoor temperature in °C
The boiler water temperature is limited
upwards by the limit thermostat and the
temperature set on the electronic max.
temperature limiter.
The flow temperature cannot rise above
the boiler water temperature.
14
Boiler temperature sensor
The boiler temperature sensor is already
connected in the control unit for weather-
compensated operation and installed in
the boiler.
Ambient temperature
H during operation: 20 to +130 °C
H during storage
and transport:
Please note:
If hydraulic decoupling (i.e. a low loss
header) is used, a temperature sensor
must be connected for the common flow
downstream from the low loss header
(see Vitodens Technical Guide).
Outdoor temperature sensor
2.6 2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
Sensor location:
0.2 H North or north-west wall of the build
ing.
H 2 to 2.5 m above the ground or, in the
case of multi-storey buildings, about
halfway up the second storey.
Electrical connection:
H 2-core cable, max. cable length 35
metres with a conductor cross-section of
2
1.5 mm copper
H The cable must not be laid together
with 230/400 V lines.
Degree of
protection:
Ambient temperature
during operation,
storage
and transport:
Cylinder temperature sensor
Included in standard delivery with
H connection kit for wall-mounted DHW
H connection kit for DHW cylinders (120
20 to +170 °C H connection kit for DHW cylinders (160,
Cable length approx. 3.75 metres, with
plug ready for connection
Degree of
protection:
Ambient temperature
H during operation: 20 to +90 °C
H during storage
and transport:
IP 43
40 to +70 °C
cylinders (80 litres) (to be ordered at
same time)
or 150 litres) positioned under boiler (to
be ordered at same time)
200 or 300 litres) positioned remote to
boiler or other DHW cylinders (to be or
dered at same time)
IP 32
20 to +70 °C