Viessmann Vitocrossal 200 Service Instructions Manual page 10

Initial start-up, inspection, maintenance
Further details regarding the individual steps
3. Switch OFF the mains isolator
(outside the installation room) or
the power supply and prevent
unauthorised reconnection.
4. Undo fitting A.
5. Remove the venturi mixer tube H
from the gas fan.
Pull off the compensation line E
when operating the boiler in
balanced flue mode.
Conversion for 115 to 311 kW
1. Close the gas shut off valve.
2. Switch OFF the system ON/OFF
switch at the control unit.
10
(cont.)
6. Release the gas combination
valve from flange G.
7. Remove restrictor C with gasket
D from venturi mixer tube H.
8. Secure the gas combination valve
(without restrictor C and without
gasket D, but including O ring
B) at flange G.
9. Secure venturi mixer tube H at
the gas fan.
Push compensation line E onto
the mixer tube when operating the
boiler in balanced flue mode.
10. Fit and tighten fitting A.
11. Affix enclosed label "Adjusted to
..." F above the existing label.
12. Start the burner (see page 7).
Danger
Escaping gas leads to a risk of
explosions.
Check all fittings for sound-
ness.
3. Switch OFF the mains isolator
(outside the installation room) or
the power supply and prevent
unauthorised reconnection.