Further Assembly And Commissioning; Checking For Flue Gas Leakage; Gas Valve - Viessmann Vitocrossal 300 CA3 2.5 Installation And Service Instructions Manual

Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service

Further Assembly and Commissioning

WARNING
Escaping gas leads to a risk of explosion.
Check the fitting for gas tightness.

Checking for Flue Gas Leakage

CAUTION
Failure to ensure that all flue gases have been safely
vented to the outdoors can cause property damage,
severe personal injury or loss of life. Flue gases may
contain deadly carbon monoxide.
Automatic Leakage Test for Valves of the Combination Gas Valve
WARNING
Risk of explosion due to gas leakage. Check for gas
leakage at the gauge connections.
1. Position the burner tile with burner mesh assembly on
the 8 studs on the boiler section. Tighten nuts with a
torque of 29.5 lb.ft (40 Nm).
2. Push on the electrode connectors.
3. Insert connectors at the plug-in panel and at the burner
control unit; insert mains plug fÖ last.
4. Fit the gas connection pipe.
Note: The use of leak detection spray can result in faulty
operation. Leak detection spray must not come into
contact with electrical contacts.
5. Start the burner and carry out a function test. Vitocrossal
CA3 installation and service instructions.
6. Install the boiler jacket.
Check flue gas collector and boiler body for leakage.
IMPORTANT
Gaskets can be checked with a dew point hygrometer
at full load operation. Detach thermal insulation parts if
necessary. Traces of condensed water on the exterior of
the glue gas collector or on the thermal insulation parts
also indicate leakages.
The burner control unit triggers an automatic leakage
check of both valves at burner start-up.
If valves are leak-free the burner shifts into normal
operating mode and the burner ignites.
If the first valve leaks, the error code "
in the burner control unit display, if the second valve
leaks, " " will appear.
F E2
In both cases, the combination gas valve should be
replaced.
Service
" will appear
F E1
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