Shutting Down The Heating System; Opening The Boiler Door; Separating The Neutralising System From The Boiler And Connecting The Drain Hose - Viessmann VITOCROSSAL 300 Service Instructions Manual

Further details regarding the individual steps
1. Undo M 10 nut A on lever B of
rotary damper C.
2. Adjust the lever until all pulsating
noises have ceased (the lever mir-
rors the damper position).

Shutting down the heating system

1. Switch OFF the main isolator or the
power supply and safeguard
against unauthorised reconnection.

Opening the boiler door

1. Remove the gas supply pipe.
2. Undo the screws on the boiler door
and open the door.
Separating the neutralising system from the boiler and con-
necting the drain hose
1. Separate hose or pipe A to the
neutralising system from the flue
gas collector or siphon.
Commissioning, inspection, maintenance
(cont.)
3. Lock the rotary damper with M 10
nut.
4. Readjust the burner, if required.
2. Pull plug-in connectors fA and lÖ
from the burner.
3. Close the gas shut-off valve.
!
Please note
Scratches inside the combus-
tion chamber can lead to corro-
sion.
Never put tools or other objects
into the combustion chamber.
2. Remove the siphon (if installed)
from the condensate drain.
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