DOMINA 80 E
9
2.05 Domestic hot water variability characteristics
The temperature of the domestic hot water can be varied from 40 to 55
°
C by adjusting the boiler
potentiometer.
Diagram of domestic hot water production
Fig. 6
2.06 Pump characteristics
The pump head available for circulating the water is given in fig. 7.
N.B.
- The pump is factory set at position 3. The pump is a Grundfos type 15-50 UPS series.
Grundfos Pump per formance graph
Note
- Minimum flow through boiler heat
exchanger at any time should not fall below 6
litres per minute.
If the total volume of water in the system exceeds
40 litres an additional expansion vessel must be
fitted to the central heating return pipe.
Pump performance curve Grundfos UPS 15-50
0
3
4
5
6
7
8
9
10
11
12
13
14
15
16
39
40
45
50
55
60
65
T
emperatura di erogazione sanitaria
°
C
Portata sanitaria dm /min.
Potenza caldaia scambiata
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
kcal/h
x1000
3
Temp. entrata acqua sanitaria 15
°
C
Temperature of domestic hot water intake 15
°
C
Flow of domestic hot water l/min
Temperatur
e of domestic hot water supply
°
C
Boiler output exchanged kcal/hx1000
Fig. 7
1 2 3
Speed settings
A
Boilers pressure drop
B
Available pump head C.H.
