Adjust The Burner Setting If Several Boilers Are Connected To A Shared Flue (Flue Gas Cascade) - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Further details regarding the individual steps
Adjust the burner setting if several boilers are connected to a
shared flue (flue gas cascade)
Adjust the burner setting of each con-
nected boiler by a correction factor to
match it to the flue system.
X21 X7
X20
A
4 3 2 1
B
Commissioning, inspection, maintenance
System conditions:
■ Shared flue gas header 7 100 mm
■ Up to 4 boilers with the same rated
heating output connected to the
shared flue system
1. At terminal block A insert jumper
2. Switch ON the ON/OFF switch.
3. Turn both rotary selectors "tw" and
4. Refer to the following table for the
r
5. Within 2 s, turn rotary selector "tw"
(cont.)
B across terminals 3 and 4.
"tr" simultaneously to their central
positions.
The display shows "SERV".
correction factor required for the flue
system.
to the top left range.
The display shows "r", "A", and
the selected correction factor
flashes.
In the delivered condition, factor 0
has been set.
47