Motorised Flue Gas Damper - Viessmann VITOTRONIC 100 Installation And Service Instructions Manual

Components

Motorised flue gas damper,

150
STB N STB TR TR
1 2 3
F
M
~
Function check
The burner may only start after the
flue gas damper has opened 90% of
the pipe cross−section and the limit
switch has been activated.
138
part no. 9586 973 and 9586 974
ON ON
A
C
B
When connecting, remove jumper
"TR" "ON/TR".
A To control unit
B Flue gas damper motor
C Limit switch
You can check the switch function by
measuring its voltage:
Flue gas damper closed (switch
open) no voltage at terminal 3.
Flue gas damper open (switch
closed) voltage at terminal 3.