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 contract
or.
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 w
ater temperature
must not be exceeded (safety valve will spill).
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