Performing Final Checks; Checking The Safety Valve Function; Checking The Mixer For Ease Of Operation And Leaks - Viessmann Vitocrossal CRU 800 Service Instructions For Contractors

Checking the gaskets on the flue gas side
Fig. 18
1. Check the joints between flue gas collector
boiler back panel for tightness.
Note
Check the gaskets at full load operation, for exam-
ple using an inspection mirror, gas sensor or ther-
mal image camera. If required, remove the thermal
insulation components. Traces of condensate on
the outside of flue gas collector
leak.

Performing final checks

Enter the actual values into the report.

Checking the safety valve function

Checking the mixer for ease of operation and leaks

1. Remove the motorised lever from the mixer han-
dle.
2. Check the mixer for ease of operation.
B
C
A
and 2. Check the flue gas temperature sensor and plug-in
A
3. Check gasket
A also indicate a
3. Check the mixer for tightness. Replace the O-ring
4. Click the motorised lever into place.
Commissioning, inspection, maintenance
(cont.)
connection for correct seating.
B
with the boiler flue connection for
C
tightness. If necessary, replace the gasket.
seals if the mixer leaks.
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