11
SYSTEM PRESSURE
6 720 644 864a (2010/10)
4SYSTEM PRESSURE
4.1 SEALED HEATING SYSTEMS
This boiler is fitted to a sealed heating system which is pre-pressurised. Your installer will advise you
of the minimum and maximum pressure indicated on the pressure gauge.
B Check regularly that the pressure is maintained.
Fig. 6 Optimum pressure when cold (area A)
B Contact your installer or maintenance engineer if a permanent significant decrease in pressure is
indicated on the pressure gauge.
The filling method on the i System boiler will be an external filling loop, with fitted valves and a flexible
hose. The filling loop should ideally be located close enough to the boiler so that the pressure gauge
can be monitored during filling.
6720643356-11.1Wo
2
3
1
04
bar
A
Min
1 bar
1.5 bar
Max
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