Viessmann VITODENS 242-F Installation And Service Instructions Manual page 99

"General"
(cont.)
Coding in the delivered condition
35:0 Without extension EA1
36:0 Function output aBJ at
extension EA1:
Fault message
3A:0 Function input DE1 at ex-
tension EA1:
No function
3b:0 Function input DE2 at ex-
tension EA1:
No function
Possible change
35:1 With extension EA1 (auto-
matic recognition)
36:1 Feed pump
36:2 DHW circulation pump
3A:1 Operating program
changeover
3A:2 External demand with set
flow temperature.
Set value setting: Coding
address "9b" in this group.
Internal circulation pump
function: Coding address
"3F" in this group.
3A:3 External blocking.
Internal circulation pump
function: Coding address
"3E" in this group.
3A:4 External blocking with fault
message input.
Internal circulation pump
function: Coding address
"3E" in this group.
3A:5 Fault message input
3A:6 Brief operation, DHW cir-
culation pump (pushbutton
function).
DHW circulation pump run-
time adjustment: Coding
address "3d" in this group
3b:1 Operating program
changeover
3b:2 External demand with set
flow temperature.
Set value setting: Coding
address "9b" in this group.
Internal circulation pump
function: Coding address
"3F" in this group.
3b:3 Function input DE2: Exter-
nal blocking.
Code 2
99