Viessmann VITOTRONIC 300-K Operations Instructions download pdf (Page 32)

Vitotronic 200 and 300-K Installation and Service

5693 976 - 04

Checking sensors – Vitotronic 300-K

1. Press OK and simultaneously for approx. 4 sec.

2. “Diagnosis”

3. Select group (see page 68).

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

Commissioning

Checking Outputs Actuators and Sensors (continued)

Changing the slope and shift

Extended menu:

2. “Heating”

3. Select heating circuit.

4. “Heating curve”

5. “Slope” or “Shift”

6. Select heating curve according to the system

requirements.

Legend

A Changing the slope

B Changing the shift (vertical parallel offset of the

heating curve)

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.

Settings in the factory set condition:

H Slope = 1.4

H Shift = 0

Boiler water or supply

temperature

Room

set-point

temperature

Outdoor temperature

Slope

Outside temperature

Boiler water or

supply temperature

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 95 96

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Viessmann VITOTRONIC 300-K Operations Instructions Page 32

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