5.2.3
Electrical power supply
Power supply voltage
230 V AC/50 Hz
Caution
Please ensure the polarities shown on the terminals are followed,
i.e live (L), neutral (N) and earth (
)
5.2.4
Circulating pump
The boiler's water flow rates must be higher than or equal to the
specifications in the table below:
Tab.12 Water flow rates in the boiler
Boiler model
Working flow rate with the low-loss header kit: minimum flow rate (litres/
hour)
SIRIUS THREE FS 130
2250
SIRIUS THREE FS 150
3000
SIRIUS THREE FS 200
3500
SIRIUS THREE FS 250
4500
1 Q flow rate (litres/hour)
2 H pressure in millibar (mbar)
3 Operating water flow rate at nominal heat output = 3730 litres/hour
where ∆T = 30°C
4 Operating water flow rate at nominal heat output = 5600 litres/hour
where ∆T = 20°C
5 Operating water flow rate at nominal heat output = 7500 litres/hour
where ∆T = 15°C
ΔT Temperature difference between the flow water and the return
water in the boiler
1 Q flow rate (litres/hour)
2 H pressure in millibar (mbar)
3 Operating water flow rate at nominal heat output = 4310 litres/hour
where ∆T = 30 °C
4 Operating water flow rate at nominal heat output = 6460 litres/hour
where ∆T = 20 °C
5 Operating water flow rate at nominal heat output = 8610 litres/hour
where ∆T = 15°C
ΔT Temperature difference between the flow water and the return
water in the boiler
Fig.17
Pressure drops for SIRIUS THREE
FS 130
-
100
200
300
400
500
600
700
800
900
1 000
1 100
0
2000
4000
6000
8000
10000
1
6
7
2
3
4
5
MW-5000723-1
Fig.18
Pressure drops for SIRIUS THREE
FS 150
MW-5000724-2
2
0
200
400
600
800
1000
1200
1400
1600
0
2000
4000
6000
8000
10000
12000
1
3
4
5
5 Before installation
30
7702639 - v03 - 10072018
