Viessmann Type B2HA Operations Instructions download pdf (Page 149)

149

You can select which direction the heat-

ing program changeover takes in coding

address "d5" in the "Heating circuit"

group:

Heating program - changeover Code

Changeover towards "Permanently reduced" or "Permanent

standby" mode (subject to the selected set value)

d5:0

Changeover towards "Constant heating mode" d5:1

The duration of the heating program

changeover is set via coding address

"F2" in the "Heating circuit" group:

Heating program - changeover Code

No operating program changeover F2:0

Duration of the operating program changeover 1 to 12 hours F2:1 to

F2:12

The operating program changeover

stays enabled for as long as the contact

remains closed, but at least as long as

the duration selected in coding address

"F2".

External blocking

The "External blocking" and "External

blocking and fault message input" func-

tions are connected via extension EA1.

There are 3 inputs available at extension

EA1 (DE1 to DE3).

The function is selected via the following

coding addresses in the "General"

group:

External blocking Code

Input DE1 3A:3

Input DE2 3b:3

Input DE3 3C:3

Function description

Control functions

(cont.)

5772 909 GB

Service

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Viessmann Type B2HA Operations Instructions Page 149