Set Maximum Output; Check All Primary And Secondary Circuit Connections For Leaks; Check Gas Pipes And Fittings For Leaks - Viessmann Vitocrossal 300 Series Service Instructions Manual

Vitocrossal 300 CU3A 26 to 199 Service
Setting the Maximum Output

Check All Primary and Secondary Circuit Connections for Leaks

Check Gas Pipes and Fittings for Leaks

You can limit the maximum output for heating operation.
The limit is set via the modulation range. The max.
adjustable output is limited upwards by the boiler coding
card.
1. Press OK and simultaneously for approx. 4 sec.
2. "Service functions"
3. "Max. output"
4. "Change?" Select "Yes". A value flashes on the
display (e.g. "85"). In the delivered condition,
this value represents 100% of rated output.
5. Set the required value.
Check heating system and domestic hot water
connections (if applicable). Ensure all connections
are pressure tight. Correct any leaks found on fittings,
pumps, valves, etc.
Note: For the tightness test, use only suitable and
approved leak detecting agents and devices.
Leak detecting agents with unsuitable contents
(e.g. nitrites, sulphides) can lead to material
damage. Remove residues of the leak detecting
agent after testing.
WARNING
Escaping gas leads to a risk of explosion.
Check gas equipment for tightness.
WARNING
The gas supply piping must be leak tested before placing
the boiler in operation.
CAUTION
Ensure all joints of gas line are pressure tight and that
gas valves do not leak when under normal operating
pressure (use approved leak detection liquid).
Start-up
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