Circulating Pump - Potterton SIRIUS THREE FS 50 Installation Manual

5 Before installation
Tab.13 Water flow rates in the boiler
Working flow rate Unit
with the low-loss
header kit
Minimum flow rate litres/hour
Maximum flow litres/hour
Fig.15 Pressure drops for SIRIUS THREE
FS 50
12
10
8
2
6
4
3
2
0
1
Fig.16 Pressure drops for SIRIUS THREE
FS 70
8
7
6
5
2
4 4
3
3
2
1
0
1
26
5.2.4
The boiler's water flow rates must be higher than or equal to the
specifications in the table below:
SIRIUS THREE FS
50
800
2450
5
4
MW-3000007-01
5
MW-3000008-01
Caution
Please ensure the polarities shown on the terminals are followed,
i.e live (L), neutral (N) and earth (

Circulating pump

SIRIUS THREE FS
70
1500
3500
Important
ΔT: Temperature difference between the flow water and the return
water in the boiler
1 Q flow rate (litres/hour)
2 H pressure in metres of water column (mWC)
3 Operating water flow rate at nominal heat output = 1330 litres/hour
where ∆T = 30°C
4 Operating water flow rate at nominal heat output = 2000 litres/hour
where ∆T = 20°C
5 Operating water flow rate at nominal heat output = 2660 litres/hour
where ∆T = 15°C
1 Q flow rate (litres/hour)
2 H pressure in metres of water column (mWC)
3 Operating water flow rate at nominal heat output = 1920 litres/hour
where ∆T = 30°C
4 Operating water flow rate at nominal heat output = 2880 litres/hour
where ∆T = 20°C
5 Operating water flow rate at nominal heat output = 3840 litres/hour
where ∆T = 15°C
)
SIRIUS THREE FS SIRIUS THREE FS
90 110
2000 2250
4600 4800
7609493 - v08 - 24072018