Dhw - Viessmann FB2A Installation And Service Instructions For Contractors

Boiler
(cont.)
Coding in the delivered condition
28:0 No burner interval igni-
tion
2E:0 Without external exten-
sion
30:0 Never adjust
31:... Set speed of the internal
circulation pump when
operated as boiler circuit
pump %, specified by the
boiler coding card
38:0 Status burner control unit:
Operational (no fault)

DHW

Coding
Coding in the delivered condition
DHW
56:0 Set DHW temperature
adjustable from 10 to
60 °C
58:0 Without auxiliary function
for DHW heating
Possible change
28:1 Time interval adjustable
to from 1 to 24 h. The burner
28:24 is force-started once every
30 s (only when operating
with LPG).
2E:1 With external extension
(automatic recognition)
31:0 Set speed adjustable from
to 0 to 100 %
31:100
Status burner control unit:
38:≠0
Fault
Possible change
56:1 Set DHW temperature
adjustable from 10 to
above 60 °C
Note
Maximum value subject to
boiler coding card.
Observe the max. permis-
sible DHW temperature.
58:10 Input of a second set DHW
to temperature, adjustable
58:60 from 10 to 60 °C (observe
coding addresses "56" and
"63")
Code 2
75