Heating Circuit - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Codes
Coding level 1
(cont.)
Coding
Coding in the delivered condition
Enable DHW circulation pump
73:0 DHW circulation pump: "ON" ac-
cording to time program (only for
weather-compensated control
units)
"Heating circuit ..."/Group 5
Select "Heating circuit ..." for weather-compensated
control unit (see page 55).
Coding
Coding in the delivered condition
Economy function outside temperature
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
Coding in the delivered condition
Extended economy function adjusted outside temperature
A6:36 Extended economy control disa-
bled (only for weather-compensa-
ted control units)
58
)
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
Possible change
73:1 During time program
to "ON" from once per hour for 5 min to
73:6 "ON" 6 times per hour for 5 min
73:7 Constantly "ON"
Select "5" for constant temperature control unit (see
page 55).
Possible change
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
Possible change
A6:5 Extended economy mode enabled;
to i.e. at a variably adjustable value be-
A6:35 tween 5 and 35 °C, plus 1 °C, the
burner and heating circuit pump stop
and the mixer closes. The basis for
this is the adjusted outside tempera-
ture. The adjusted outside tempera-
ture is based on the actual outside
temperature and a time constant,
which takes into account the cooling
down of an average building.