Viessmann Vitodens 300-W Technical Manual page 27

Vitodens 300-W
(cont.)
Rated heating output range
in kW
1.9-11
1.9-19
4.0-26
4.0-35
In order to run the heating system with even greater energy savings
and minimum flow noise, the heating circuit pump can be operated
alternatively with a specified residual head (parameter "86"), subject
to the following system conditions.
■ System conditions:
■ System only has one heating circuit without mixer
■ System has no low loss header or heating water buffer cylinder
■ Heating circuit in a typical detached house
For appliances in conjunction with a heating circuit without mixer, we
recommend a residual head of 120 mbar.
VITODENS
Speed settings in the delivered
condition in %
Min. pump rate Max. pump
rate
38
38
40
40
Note
In conjunction with a low loss header, heating water buffer cylinder
and heating circuits with mixer, the internal circulation pump runs at
a constant speed. The speed can be adjusted subject to demand by
changing codes at the control unit.
50
55
Specification circulation pump
75
Rated heating out- kW
85
put
Circulation pump Typ
e
Rated voltage V~
Power consumption
– max. W
– min. W
– Delivered condi- W
tion
Energy efficiency
class
1.9-11 1.9-19 4.0-26
UPM3 UPM3 UPM3
15-75 15-75 15-75
230 230 230
60 60 60
2 2 2
14 24 39
A A A
VIESMANN
4.0-35
UPM3
15-75
230
60
2
54
A
3
27