Viessmann VITOTRONIC 300 Operating Instructions Manual page 42

Single boiler system or multi boiler system with weather-compensated control unit.

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Emissions test mode

Emissions test mode for testing flue gas with briefly

raised boiler water temperature.

Emissions test mode should be activated only by your

flue gas inspector, during the annual inspection.

Set the emissions test switch (see chapter "Starting

the heating system") to position

The following functions are activated:

The burner is switched ON.

■

The pumps are started.

■

Note

Emissions test mode in the case of an lag boiler con-

trol unit:

Only the heating circuit pumps start.

The mixers remain set to the control function.

■

The electronic temperature controller regulates the

boiler water temperature.

Ending emissions test mode

Set the emissions test switch to position

Close the flap.

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