Viessmann vitodens Technical Manual page 20

1.2 Specification
Vitotronic 200 for weather-compensated mode
Heating curve setting (slope and level)
The control unit controls 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
extension kit for one heating circuit with
mixer) subject to outside temperature.
The flow temperature required to reach a
1
certain room temperature depends on the
heating system and the thermal
insulation of the building to be heated.
Adjusting both heating curves matches
the boiler water temperature and the flow
temperature to these operating
conditions.
Heating curves:
Heating curve slope
90
80
70
60
50
40
30
20
20 15 10 5 0 -5 -10 -15 -20
Outside temperature ºC
The upper boiler temperature is limited
by the temperature limiter and the
temperature set on the electronic
maximum temperature limiter.
The flow temperature cannot exceed the
boiler water temperature.
20
Boiler temperature sensor
The boiler temperature sensor is
connected to the control unit for
weather-compensated mode, and is an
integral part of the boiler.
Permiss. ambient temperature
H in operation: 20 to +130 ºC
H during storage
and transport: 20 to +170 ºC
Note
When using a hydraulic de-coupler (low
loss header), connect a temperature
sensor for use in the low loss header (see
installation examples).
Outside temperature sensor
1.8
1.6
.
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Installation location:
H North or north-westerly wall of the
building
H 2 to 2.5 m above the ground; for
multi-storey buildings at approx. the
upper half of the second floor.
Connection:
H 2 core lead, length max. 35 m when
using a cross-section of 1.5 mm
(copper).
H Do not run the cable immediately next
to 230/400 V cables.
Protection: IP 43 to EN 60 529
Permissible ambient
temperature for
operation, storage
and transport: 40 to +70 ºC
Cylinder temperature sensor
Standard delivery for
H Connection set for wall mounted DHW
cylinders (80 litres) (order separately)
H Connection set for DHW cylinders
installed below the boiler
(120 or 150 litres) (order separately)
H Connection set for DHW cylinders
installed adjacent to the boiler
(160, 200 or 300 litres) or other DHW
cylinders (order separately)
H Order the cylinder temperature sensor
for Vitodens 300 from 49 kW separately
(see page 28).
Cable length approx. 3.75 m, wired ready
to plug in
Protection:
Permissible ambient
temperature
H during operation: 20 to +90 ºC
H during storage
and transport:
Cylinder temperature sensor and
loading temperature sensor
(only for Vitodens 333)
The sensors are connected to the control
unit and built into the boiler.
Protection:
Permissible ambient
temperature
H in operation:
H during storage
and transport:
2
IP 32
20 to +70 ºC
IP 32
20 to +90 ºC
20 to +70 ºC
VITODENS