Sensors; Connection; Checking Sensors - Viessmann Vitoligno 300-C Installation And Service Instructions For Contractors

High limit safety cut-out
3. Close cover
A on the programming unit.

Sensors

Sensor type Pt1000:
Flow temperature sensor
■
■ Buffer temperature sensor
■ Return temperature sensor
■ Flue gas temperature sensor
■ Outside temperature sensor

Connection

See chapter "Connection and wiring diagram" from
page 117.

Checking sensors

Flue gas temperature sensor
1.75
1.25
0.75
A 50
0
Temperature in °C
Fig. 40
Data point shown: Resistance of 1.1 k
A
perature of 25 °C
Further sensors
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
-30 -20 -10
Temperature in °C
Fig. 41
1. Pull out corresponding plug.
(cont.)
150
100
at a tem-
Ω
0 10 20 30 40
4. Acknowledge excess temperature at the program-
ming unit of the control unit with
Curve of the sensor from the extension kit for heating
circuit with mixer:
Extension kit installation instructions
200 250
50
2. Check the sensor resistance at the plug.
Maintenance
d .
75