Viessmann FB2B Installation And Service Instructions Manual page 79

General
(cont.)
Coding in the delivered condition
3b:0 Function input DE2 at
extension EA1: without
function
Possible change
3b:1 Function input DE2: Heat-
ing program changeover
3b:2 Function input DE2: Exter-
nal demand with set flow
temperature.
Function internal circula-
tion pump: Coding address
3F
3b:3 Function input DE2: Exter-
nal blocking.
Function internal circula-
tion pump: Coding address
3E
3b:4 Function input DE2: Exter-
nal blocking with fault mes-
sage input
Function internal circula-
tion pump: Coding address
3E
3b:5 Function input DE2: Fault
message input
3b:6 Function input DE2: Brief
operation, DHW circulation
pump (pushbutton func-
tion).
DHW circulation pump run-
time adjustment: Coding
address 3d
Code 2
79