Prepare for operation
Greenstar FS/Combi FS – 6720810589 (2021/01)
12
3.1
Checking the boiler water pressure
The standard boiler water pressure is 14.5 - 21.75 psi (1 - 1.5 bar).
Should a higher boiler water pressure be required, refer to a trained and certified
heating contractor.
0010026578-001
1
0
2
3
4
bar
psi
15
30
45
Fig. 1
Pressure gauge
3.2
Topping up the heating system water
Topping up the heating system water is different on every system. Therefore, you
should ask a trained and certified heating contractor to show you how it is done.
Maximum pressure
of 30 psi (2.07 bar) at maximum heating water temperature
must not be exceeded (safety valve will spill).
