Connect a hose to the drain valve so
that the water drains to a well-established
place.
B Press and hold the key until the display shows - - The
key turns off and the display shows the flow temperature.
Heating circuit
Domestic hot water circuit
B Close the cold water inlet valve in
B Remove the plug (234/1) from the inlet nozzle
If the desired flue gas values have not been
obtained, you must clean the burner and heat
exchanger, then check the rolling diaphragm and flue
pipe.
B Empty the radiators.
.
B All domestic hot water taps supplied by the
boiler are opened.
B Refit the plug.
Maintenance
B Measure the air temperature required for combustion.
Fig. 57
B Put the plug back on the measuring nozzle.
B Put the plug back on the measuring nozzle.
apparatus.
B The boiler is emptied by opening the valve on the
return of the heating circuit.
32
B Insert the probe 35 mm into the nozzle and seal the
measuring hole.
air required for combustion.
i
8.3 Emptying the heating system
234 Flue gas measuring nozzle
234/1 Combustion nozzle
6 720 610 828 RO (02.01)
Machine Translated by Google
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