Viessmann VITOTRONIC 100 Installation And Service Instructions Manual page 105

Checking outputs (actuators) and sensors
The following relay outputs can be controlled subject to system design:
Display Relay function
indication
Burner or stage1 ON
11
Burner stage 1 and 2 ON or modulation open
12
Burner modulation neutral
13
Burner stage 1 ON (modulation closed)
14
Output 20 ON
15
Output 29 ON
16
Output 52 open
17
Output 52 neutral
18
Output 52 closed
19
Cylinder primary pump ON
10
Central fault message ON
11
Checking sensors
1. Press c.
Scanning operating conditions
is active, see page 109.
2. Scan the actual temperatures
with a or b.
(cont.)
3. Press c.
Scanning is completed.
Commissioning
105