System Pressure; Sealed Heating System - Worcester GREENSTAR i SYSTEM User Manual
Wall hung rsf gas fired condensing system boiler
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4
SYSTEM 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.
1.5 bar
A
1 bar
Min
6 720 644 864a (2010/10)
Max
2
1
1
3
0
4
bar
SYSTEM PRESSURE
11
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Questions and answers
I can’t get my green star I to stay operating it keeps turning off
The Worcester Greenstar i System boiler may keep turning off due to several possible reasons:
1. No Power – Check if the boiler has a permanent mains supply. Inspect Fuse F1 (2.5A) or Fuse F3 (0.5A) and the transformer. If faulty, replace the control board.
2. No Live Demand – Ensure there is a live demand at ST10-L from an external room thermostat or timer. Some older thermostats may not return proper voltage.
3. Diverter Valve Issue – If the boiler operates without a live demand signal, check that no permanent live feed is present at ST10-L from another source.
4. Incorrect Piping – Ensure the cold inlet and DHW outlet are correctly piped and not crossed.
5. Flow Turbine Issue – If the boiler is not operating during hot water demand, test the flow turbine.
Further troubleshooting may require checking the control board and other electrical components.
This answer is automatically generated