Viessmann Vitotronic 100 Installation And Service Instructions Manual page 28

Commissioning
Testing the high limit safety cut-out
Type KC2B
1. Hold down the "test" key (position " ") until the
burner switches off:
The temperature controller " " is bridged. When
the boiler water temperature reaches the safety
temperature, the high limit safety cut-out switches
the burner and the electronic control off.
2. Release the "test" key.
Type KC4B
Fig. 26
Matching coding addresses
The control unit must be adjusted subject to the sys-
tem equipment level. For steps and code overviews,
see chapter "Codes".
Checking the outputs (actuator test)
1. Press OK and simultaneously for approx. 4 s.
flashes on the display.
2. Use to select and confirm with OK.
28
X 1
2
A B
3. Wait until the boiler water temperature has dropped
approx. 15 to 20 K below the selected safety tem-
perature.
4. Press the reset button.
1. Switch off the heating system.
2. Insert jumper at test terminals
B
3. Switch on the heating system.
The temperature controller " " is bridged. If the
boiler water temperature reaches the safety tem-
perature, the high limit safety cut-out switches the
burner and the electronic control off.
4. Switch off the heating system.
5. Remove jumper C .
6. Switch on the heating system.
7. Wait until the boiler water temperature has dropped
approx. 15 to 20 K below the selected safety tem-
perature.
8. Press the reset button.
3. Select required actuator with / (see following
table).
The display shows the number for the activated
actuator and "On".
4. Terminate actuator test: Press
.
A
.