Viessmann Vitodens 222-F Installation And Service Instructions For Contractors page 70

Codes
Coding level 2
(cont.)
Parameter
address A3:...
9
–
8
–
7
–
6
–
5
–
4
–
3
–
2
–
1
–
0
1
2
to
15
Coding in the delivered condition
A4:0 With frost protection (only for
weather-compensated control
units)
A5:5 With heating circuit pump logic
function (economy control): Heat-
ing circuit pump is "OFF" when the
outside temperature (OT) is 1 K
higher than the set room tempera-
ture (RT
OT
>
compensated control units)
Parameter address A5:...
1
2
3
4
5
6
7
to
15
70
Heating circuit pump
"ON"
10 °C
–
9 °C
–
8 °C
–
7 °C
–
6 °C
–
5 °C
–
4 °C
–
3 °C
–
2 °C
–
1 °C
–
0 °C
+1 °C
to
+14 °C
)
set
RT + 1 K (only for weather-
set
With heating circuit pump logic function: Heating circuit pump "OFF"
OT RT + 5 K
>
set
OT RT + 4 K
>
set
OT RT + 3 K
>
set
OT RT + 2 K
>
set
OT RT + 1 K
>
set
OT RT
>
set
OT RT 1 K
> –
set
OT RT 9 K
> –
set
"OFF"
8 °C
–
7 °C
–
6 °C
–
5 °C
–
4 °C
–
3 °C
–
2 °C
–
1 °C
–
0 °C
+1 °C
+2 °C
+3 °C
to
+16 °C
Possible change
A4:1 No frost protection; this setting is on-
ly possible if code "A3:
set.
!
A5:0 Without heating circuit pump logic
function
A5:1 With heating circuit pump logic func-
to tion: Heating circuit pump "OFF",
A5:15 see following table
9" has been
–
Please note
"Important": Observe for cod-
ing address "A3".