Checking All Connections On The Heating Water Side And The Sensor Well For Leaks - Viessmann VITOCROSSAL 300 Service Instructions Manual

Further details regarding the individual steps
Checking all connections on the heating water side and the sen-
sor well for leaks
Danger
There is a risk of injury when
working on pressurised compo-
nents.
Only open the connections on the
heating water side after the boiler
has been de-pressurised.
A
1. Undo the screws of top panels A
and remove the panels.
2. Open thermal insulation C of the
heat exchanger module until con-
necting flange D is freely accessi-
ble.
Commissioning, inspection, maintenance
Only drain the boiler with a suc-
tion pump when the boiler air vent
valve is open.
D
C
B
3. Check connecting flange D, sensor
well B and all connections on the
heating water side for leaks.
4. Close the thermal insulation of the
heat exchanger module.
5. Position the top panels and secure
with screws.
(cont.)
A
A
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