Testing The Static And Supply Pressure - Viessmann VITOCROSSAL Service Instructions Manual

Commissioning, inspection, maintenance
Function sequence and possible faults
Yes
Ionisation current builds
Symbol
A
Yes
Burner in operation
Yes
Automatic calibration of
the combustion controller
For further details regarding faults, see page 67.

Testing the static and supply pressure

Danger
CO formation can have serious health implica-
tions.
Always carry out a CO test before and after
work on gas appliances.
14
No
Fault EE
No Shuts down below the set
boiler water temperature and
restarts immediately.
Fault E3
No
Fault EB
Fig. 3
(cont.)
Check setting for ionisation
electrode.
Purge the gas line.
Check the flue system for
tightness (flue gas recircula-
tion); check the gas flow
pressure.
Ensure adequate heat trans-
fer. Press reset button R.
Check gap between ionisa-
tion electrode and burner
gauze assembly.
Check allocation of gas type
(coding address 82, gas train
setting).
Check flue system; remove
flue gas recirculation if re-
quired.
Press reset button R.
Up to 80 kW
A