Viessmann VITODENS 200-W Installation And Service Instructions Manual page 70

Code 2
Heating circuit 1, heating circuit 2, heating...
Coding in the delivered condition
A5:5 With heating circuit pump logic
function (economy control): Heat-
ing circuit pump "OFF" when the
outside temperature (OT) is 1 K
higher than the set room tempera-
ture (RT
OT
>
er-compensated control units)
Parameter address A5:...
1
2
3
4
5
6
7
to
15
Coding in the delivered condition
A6:36 Extended economy control disa-
bled (only for weather-compensa-
ted control units)
A7:0 Without mixer economy function
Only for a weather-compensated
control unit and heating circuit with
mixer
A8:1 Heating circuit with mixer creates a
demand for the boiler circuit pump
(only for weather-compensated
control units)
70
)
set
RT + 1 K (only for weath-
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
(cont.)
Possible change
Note
"Important" observe for code "A3".
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 The burner and heating circuit pump
A6:35 will stop and the mixer will be closed
at a variable value, adjustable be-
tween 5 and 35 °C plus 1 °C. The
basis for this is the adjusted outside
temperature. The adjusted outside
temperature is based on the actual
outside temperature and a time con-
stant, which takes the cooling down
of an average building into consider-
ation.
A7:1 With mixer economy function (exten-
ded heating circuit pump logic):
Heating circuit pump also "OFF":
If the mixer has been trying to
■
close for longer than 20 min.
Heating circuit pump "ON":
If the mixer changes to control
■
function
If there is a risk of frost
■
A8:0 Heating circuit with mixer creates no
demand for the boiler circuit pump