Checking Gaskets And Thermal Insulation Components; Checking All Heating Water Connections And The Sensor Well For Leaks; Checking The Function Of The Safety Equipment - Viessmann VITOCROSSAL 300 Service Instructions Manual

Further details regarding the individual steps

Checking gaskets and thermal insulation components

1. Check gaskets and the packing
cord in the boiler door for damage.
Checking all heating water connections and the sensor 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-pres-
surised.
Only drain the boiler with a
vacuum pump when the boiler
air vent valve is open.

Checking the function of the safety equipment

Check the safety valves, the water
level and pressure limiters in accor-
dance with manufacturer's details.
Commissioning, inspection, maintenance
(cont.)
2. Check the thermal insulation com-
ponents of the boiler door for possi-
ble damage.
3. Replace all faulty parts.
1. Remove cap A from the back of
the boiler.
2. Check sensor well B for leaks.
3. Fit cap A.
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