Viessmann Type B2HA Operations Instructions download pdf (Page 31)

31

Note on the automatic flue gas temperature sensor test

Weather-compensated control unit Constant temperature control unit

As soon as the time and date have been

set, the control unit automatically checks

the function of the flue gas temperature

sensor.

The display shows: "Flue gas temp sen-

sor test" and "Active".

Note

If the flue gas temperature sensor is not

positioned correctly, commissioning is

cancelled and fault message A3 is dis-

played (see page 135).

Immediately after being switched on, the

control unit automatically checks the func-

tion of the flue gas temperature sensor.

The display shows: "A".

Note

If the flue gas temperature sensor is not

positioned correctly, commissioning is

cancelled and fault message A3 is dis-

played (see page 135).

Venting the boiler

B

A

Commissioning, inspection, maintenance

Further details regarding the individual steps

(cont.)

5772 909 GB

Service

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