Viessmann VITODENS 300-W Technical Manual page 26

Vitodens 300-W
The integral circulation pump is a highly efficient pump with substan-
tially lower power consumption than conventional pumps.
The pump speed and consequently the pump rate are regulated sub-
ject to the outside temperature and the switching times for heating or
reduced mode. The control unit transmits the current default settings
via an internal data BUS to the circulation pump.
Individually match the minimum and maximum speeds plus the speed
for reduced mode to the existing heating system using the control unit
codes.
In the delivered condition, the minimum pump rate (coding address
"E7") is set to 10 %. The maximum pump rate (coding address "E6")
is set to the following values:
Rated heating output range in kW
1.9-11
1.9-19
4.0-26
4.0-35
3
VIESMANN
26
(cont.)
Speed settings in the de-
livered condition in %
Specification – circulation pump
Rated heating out- kW
put
Circulation pump Typ
e
Rated voltage V~
Power consumption
– Max. W
– Min. W
– Delivered condi- W
tion
45
65
65
80
1.9-11 1.9-19 4.0-26 4.0-35
UPM2 UPM2 UPM2 UPM2
15-50 15-50 15-70 15-70
230 230 230
37 37 70
5 5 5
14 24 39
VITODENS
230
70
5
60