Viessmann FB2B Installation And Service Instructions Manual page 78

Code 2
General
(cont.)
Coding in the delivered condition
3A:0 Function input DE1 at
extension EA1: without
function
78
Possible change
3A:1 Function input DE1: Heat-
ing program changeover
3A:2 Function input DE1: Exter-
nal demand with set flow
temperature.
Function internal circula-
tion pump: Coding address
3F
3A:3 Function input DE1: Exter-
nal blocking.
Function internal circula-
tion pump: Coding address
3E
3A:4 Function input DE1: Exter-
nal blocking with fault mes-
sage input
Function internal circula-
tion pump: Coding address
3E
3A:5 Function input DE1: Fault
message input
3A:6 Function input DE1: Brief
operation, DHW circulation
pump (pushbutton func-
tion).
DHW circulation pump run-
time adjustment: Coding
address 3d