Viessmann Vitoligno 250-S Installation And Service Instructions For Contractors page 58

Maintenance
Lambda probe
For measuring the residual oxygen content in the flue
gas.
For cleaning and calibrating the Lambda probe, see
page 33.
Connection
The Lambda probe is connected with plug
See chapter "Connection and wiring diagram",
page 66.
Specification
Lambda probe curve
45
40
35
30
25
20
15
10
5
0
-5
-10
A
0 2 4 6 8
Oxygen content O2 (%) in the flue gas
Fig. 35
A ≙ λ
= 1.5
Test point: Plug , no. 3 and 4, see page 66
a:K
Probe type
Permiss. ambient temperature
During storage and transport
■
During operation
■
58
.
a:K
10 12 14 16 18 20
LSM 11
-40 to +100 °C
150 to 600 °C constant flue gas temperature with heating switched on
800 °C max. flue gas temperature with heating switched on (200 h cu-
mulative)
22