Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 100

Code 2
"General" Group
Coding in the factory set condition
4d:1
Connection at plug sL:
Shunt pump.
4E:1
Connection at plug gSA1:
Motor for 3-way mixing valve for return
temperature control.
4F:5 Run-on time, shunt or distribution pump 5 min.
52:0 Without supply temperature sensor for low loss
header.
53:1 With low loss header:
Boiler circuit pump only runs when there
is demand if the burner is operational
(with run-on time).
54:0 Without solar thermal system.
5b:0 Without extension EA1.
5C:0
Function output aBJ at extension EA1:
Central fault message.
5d:0 Function input DE1 at extension EA1:
No function.
100
(continued)
Vitotronic 300, GW2B Installation and Service
Possible change
4d:2 Boiler circuit pump.
4E:2 Motor for 3-way mixing valve, primary store
system.
4F:0 No pump run-on.
4F:1 Run-on time adjustable from 1 to 60 min.
to
4F:60
52:1 With supply temperature sensor for low loss
header; automatic recognition.
53:0 Boiler circuit pump always runs when there
is demand.
54:1 With Vitosolic 100; automatic recognition.
54:2 With Vitosolic 200; automatic recognition.
54:3 With solar control module, type SM1, without
auxiliary function; automatic recognition.
54:4 With solar control module, type SM1, with
auxiliary function, e.g. central heating backup;
automatic recognition.
5b:1 With extension EA1; automatic recognition.
5C:1 Feed pump.
5C:2 No function.
5C:3 Heating circuit pump A1 is switched to low
speed (reduced mode).
5C:4 Heating circuit pump M2 is switched to low
speed (reduced mode).
5C:5 Heating circuit pump M3 is switched to low
speed (reduced mode).
5d:1 Heating program changeover.
5d:2 External demand with minimum set supply
temperature.
Set value selected in coding address "9b".
5d:3 External blocking.
5d:4 External blocking with fault message.
5d:5 Fault message input.
5d:6 Brief operation, DHW recirculation pump
(pushbutton function).
Setting of runtime for DHW recirculation pump
in coding address "12" in the "General" group.