Table Of Contents - Worcester GREENSTAR i SYSTEM User Manual
Wall hung rsf gas fired condensing system boiler
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CONTENTS
1
Symbols and safety precautions . . . . . . . . . . . . . . . 4
1.1
Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2
Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
General Information . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1
Operating the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1 Switch off the central heating . . . . . . . . . . . . . . . . . . . . . 8
3.1.2 Boiler frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.3 Setting the hot water temperature . . . . . . . . . . . . . . . . . . 9
3.1.4 Boiler reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4
System Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1
Sealed heating system . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2
External filling loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5
Service Clearances . . . . . . . . . . . . . . . . . . . . . . . . . 13
6
Maintaining your Boiler . . . . . . . . . . . . . . . . . . . . . 14
7
Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8
Fault or Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . 17
9
TIPS ON ENERGY SAVING . . . . . . . . . . . . . . . . . . . 18
10
Environment / disposal . . . . . . . . . . . . . . . . . . . . . 20
11
Your Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
12
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6 720 644 864a (2010/10)
CONTENTS
3
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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.
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