Viessmann VITODENS 200-W Installation And Service Instructions Manual page 83

Heating circuit 1, heating circuit 2, heating...
Parameter With economy function outside tem-
A5:... perature: Heating circuit pump
"OFF"
1 OT RT
>
set
2 OT RT
>
set
3 OT RT
>
set
4 OT RT
>
set
5 OT RT
>
set
6 OT RT
>
set
7 OT RT
>
set
to
15 OT RT
>
set
"Heating limit: Complete summer economy control"
Setting
None
... °C
"Mixer economy function"
Setting
Without
With
"Influence of heating circuit with mixer on internal circulation pump"
Setting
Without
With
"Pump idle time"
Setting
With calculated pump idle time
Without
With calculated pump idle time
+ 5 K
+ 4 K
+ 3 K
+ 2 K
+ 1 K
- 1 K
- 9 K
A6:36
A6:5 to
A6:35
A7:0
A7:1
A8:0
A8:1
A9:7
A9:0
A9:1 to
A9:15
(cont.)
Explanations
Extended economy function disabled
Extended economy function enabled: The burner and
heating circuit pump will stop at a variable value, ad-
justable between 5 and 35 °C plus 1 °C. The mixer
closes.
The basis for this is the adjusted outside temperature.
This is based on the actual outside temperature and a
time constant, which takes into account the cooling
down of an average building.
Explanations
Heating circuit pump also "OFF":
If the mixer has been trying to close for some time.
■
Heating circuit pump "ON":
If the mixer changes to control function
■
If there is a risk of frost
■
Explanations
Heating circuit with mixer creates no demand for inter-
nal circulation pump
Heating circuit with mixer creates a demand for inter-
nal circulation pump
Explanations
Heating circuit pump "OFF" if set value is modified by
changing the operating mode or changing the set
room temperature.
Only if room hook-up is not set in parameter b0.
No economy function outside temperature
Adjustable from 1 to 15. The higher the value, the lon-
ger the pump idle time.
Parameter level 2
83