Performing Final Checks; Checking The Safety Valve Function; Check Mixer (If Installed) For Ease Of Movement And Leak-Tightness - Viessmann Vitocrossal CRU 800 Service Instructions Manual

Checking the gaskets on the flue gas side
Fig. 7
1. Check the joints between flue gas collector
boiler back panel for tightness.
Note
Check the gaskets at full load operation, e.g. using
an inspection mirror, dew point indicator, gas sen-
sor or thermal image camera. If required, remove
the thermal insulation sections. Traces of conden-
sate on the outside of flue gas collector
indicate a leak.

Performing final checks

Enter the actual values into the report.

Checking the safety valve function

Check mixer (if installed) for ease of movement and leak-tightness

1. Remove the motorised lever from the mixer han-
dle.
2. Check the mixer for ease of operation.
Commissioning, inspection, maintenance
B
C
A
and 2. Check the flue gas temperature sensor and plug-in
A
connection
3. Check gasket
tightness. If necessary, tighten pipe clip and
replace gasket.
A also
3. Check the mixer for tightness. Replace the O-ring
seals if the mixer leaks.
4. Click the motorised lever into place.
(cont.)
for correct seating.
B
with the boiler flue connection for
C
21