Viessmann VITOTRONIC 200 Installation And Service Instructions Manual page 30

Commissioning
Checking Outputs Actuators and Sensors
Room
set-point
temperature
Outside temperature
Legend
A Changing the slope
B Changing the shift (vertical parallel offset of the
heating curve)
30
Slope
Outdoor temperature
Vitotronic 200 and 300-K Installation and Service
(continued)
Settings in the factory set condition:
H Slope = 1.4
H Shift = 0
The heating curves illustrate the relationship between
the outside temperature and the boiler water or supply
temperature.
To put it simply: The lower the outside temperature,
the higher the boiler water or supply temperature.
The room temperature, again, depends on the boiler
water or the supply temperature.
Note: If the heating system includes heating circuits
with mixing valves, then the supply temperature
of the heating circuit without mixing valve is
higher by a selected differential (8 K in the factory
set condition) than the supply temperature of the
heating circuits with mixing valves.
The differential temperature can be changed
at coding address 9F.
Changing the slope and shift
Extended menu:
1.
2. "Heating"
3. Select heating circuit.
4. "Heating curve"
5. "Slope" or "Shift"
6. Select heating curve according to the system
requirements.
Checking sensors – Vitotronic 300-K
1. Press OK and simultaneously for approx. 4 sec.
2. "Diagnosis"
3. Select group (see page 65).
4. Scan actual temperature of the relevant sensor.
Slope setting ranges:
H Underfloor heating systems: 0.2 to 0.8
H Low temperature heating systems: 0.8 to 1.6