Viessmann VITODENS 222-F Service Instructions Manual page 52

Code 2
General
(continued)
Coding in the factory setting
3C:0
3D:5
3E:0
3F:0
52
Function input DE3 at extension
EA1: Not assigned
DHW circulation pump runtime
for brief operation: 5 minutes
Internal circulation pump
stays in control mode at
signal "External blocking"
Internal circulation pump
stays in control mode at
signal "External demand"
Vitodens 222-F B2TA 19 and 35 Service
Possible change
3C:1 Function input DE3: Heating
program - changeover.
3C:2 Function input DE3: External
demand with set supply
temperature.
Supply temperature setting:
Coding address 9B.
Internal circulation pump function:
Coding address 3F.
3C:3 Function input DE3: External
blocking.
Internal circulation pump function:
Coding address 3E.
3C:4 Function input DE3: External
blocking with fault message input
Internal circulation pump function:
Coding address 3E.
3C:5 Function input DE3: Fault
message input.
3C:6 Function input DE3: Brief
operation, DHW circulation
pump (pushbutton function).
DHW circulation pump runtime
adjustment: Coding address 3D.
3D:1 DHW circulation pump runtime
to adjustable from 1 to 60 minutes.
3D:60
3E:1 Internal circulation pump stops
at signal "External blocking".
3E:2 Internal circulation pump starts
at signal "External blocking".
3F:1 Internal circulation pump stops
at signal "External demand".
3F:2 Internal circulation pump starts
at signal "External demand".