Viessmann 7827527 Notice De Montage page 10

GB
Replacing the gas solenoid valve
07. Undo gas restrictor retainer E
from old gas solenoid valve A,
remove gas restrictor F and
insert in gas restrictor retainer E
on new gas solenoid valve A.
08. Only for Vitodens 300 to 35 kW
and Vitodens 333:
Undo connection adaptor G from
new gas solenoid valve A and fit
new differential pressure sensor
adaptor H to new gas solenoid
valve A.
09. Check whether the O-rings have
been inserted into the openings of
connection adaptor G or differen-
tial pressure sensor adaptor H.
10. Connect differential pressure sen-
sor B to new gas solenoid valve
A (click into place).
10
(cont.)
11. Check whether the gasket on the
outlet side is fitted to new gas sole-
noid valve A.
12. Secure gas solenoid valve A to
the burner (torque 5 Nm).
13. Fit flange D (torque 5 Nm).
14. Connect the cables to gas solenoid
valve A and differential pressure
sensor B.
15. Start the boiler. Test the function.
Danger
Escaping gas leads to a risk
of explosion.
Check all gas connections
for leaks.
16. Fit front panel and cover.