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System pressure
Greenstar Ri Compact ErP - 6 720 813 339 (2014/09)
4System pressure
4.1 Open vented heating systems
If the boiler is fitted to an open vented system, that is a system with a header tank, the pressure will be maintained automatically.
4.2 Sealed heating systems
If this boiler is fitted to a sealed heating system, the system will be pre-pressurised.
Your installer will have fitted a pressure gauge and filling loop so that the system can be monitored and adjusted as necessary.
Your installer will show you how to use the filling loop and advise you of the minimum and maximum pressure indicated on the
pressure gauge.
Check regularly that the pressure is maintained.
Fig. 3 Optimum system pressure when your boiler is cold (area A)
Contact your installer or maintenance engineer if a permanent significant decrease or increase in pressure is indicated on the
pressure gauge.
The filling method will be an external filling loop, fitted valves and flexible hose.
NOTICE: To comply with the Water Authority regulations you must disconnect the external filling loop after
re-pressurisation.
6720643356-11.1Wo
2
3
1
04
bar
1
A
Min
1 bar
1.5 bar
Max
8


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