Viessmann VITOCAL 300-A Installation And Service Instructions Manual page 110

Commissioning, inspection, maintenance
Further details regarding the individual steps
Function
3. Access rights
4. Programming
5. Sensor temperatures
6. Signal inputs
7. Relay (outputs)
8. Mixers
9. Commissioning
10. The system starts
110
Explanation
To log on as "Contractor" by entering code
"5243" (see page 131)
Note
The contractor level remains active until key
"Standard display" F is pressed or if no
input is given for 30 min.
System configuration (system diagram and
components)
Checking and matching sensor temperatures
Checking the signals of connected compo-
nents
Checking the connected functions and exter-
nal components with the relay test
Note
Carry out the relay test for every function and
every externally connected component
Checking the connected mixers (rotational
direction) or diverter valves
Setting all required parameters, venting the
system and checking the function of the com-
ponents (see page 113)
Note
Messages are displayed by the manual con-
trol of some components during commission-
ing. These do not indicate appliance faults.
(cont.)