Viessmann FB2B Installation And Service Instructions Manual page 80

Code 2
General
(cont.)
Coding in the delivered condition
3C:0 Function input DE3 at
extension EA1: without
function
3d:5 DHW circulation pump
runtime for brief opera-
tion: 5 min
3E:0 Internal circulation pump
stays in control mode at
signal "External block-
ing"
80
Possible change
3C:1 Function input DE3: Heat-
ing program changeover
3C:2 Function input DE3: Exter-
nal demand with set flow
temperature.
Function internal circula-
tion pump: Coding address
3F
3C:3 Function input DE3: Exter-
nal blocking.
Function internal circula-
tion pump: Coding address
3E
3C:4 Function input DE3: Exter-
nal blocking with fault mes-
sage input
Function internal circula-
tion pump: Coding address
3E
3C:5 Function input DE3: Fault
message input
3C:6 Function input DE3: Brief
operation, DHW circulation
pump (pushbutton func-
tion).
DHW circulation pump run-
time adjustment: Coding
address 3d
3d:1 DHW circulation pump run-
to time adjustable from 1 to
3d:60 60 min
3E:1 Internal circulation pump
stops at signal "External
blocking"
3E:2 Internal circulation pump
starts at signal "External
blocking"