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Worcester Greenstar 9i System ErP Installation, Commissioning And Servicing Instructions

Worcester Greenstar 9i System ErP
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Contents
Greenstar i System
ErP
- 6 720 806 945 (2015/07)
3
7.7.9 Exhaust assembly removal . . . . . . . . . . . . . . . . . . . . . . 58
7.7.10 Heat exchanger removal . . . . . . . . . . . . . . . . . . . . . . . . 58
7.7.11 Re-assembly of the air/gas manifold clamping plate . . 58
7.7.12 Primary sensor (CH NTC) . . . . . . . . . . . . . . . . . . . . . . . 59
7.7.13 Overheat thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.7.14 Spark generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.7.15 Flue overheat thermostat (with grommet) . . . . . . . . . . 59
7.7.16 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
7.7.17 Gas valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
7.7.18 Expansion vessel removal . . . . . . . . . . . . . . . . . . . . . . . 60
7.7.19 PCB fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.7.20 Replacing control unit . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7.7.21 Hydraulic block components removal . . . . . . . . . . . . . 62
7.7.22 Auto air vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.7.23 Diverter valve motor (If optional integral diverter
valve kit fitted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
7.7.24 Diverter valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.7.25 Drain tap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.7.26 Pump head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.7.27 Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.7.28 Hydraulic block removal . . . . . . . . . . . . . . . . . . . . . . . . 63
7.7.29 CH pressure relief valve . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.7.30 Bypass valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.8 Short parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8 Fault finding and diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.1 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.1.1 Maintenance Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8.1.2 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.1.3 Factory Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
8.1.4 Removing the optional integral diverter valve kit . . . . . 69
8.2 Component resistance characteristics . . . . . . . . . . . . . 70
8.2.1 Flow temperature NTC sensor . . . . . . . . . . . . . . . . . . . 70
8.2.2 DHW NTC sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
8.2.3 Flue overheat thermostat . . . . . . . . . . . . . . . . . . . . . . . 70
8.2.4 Overheat thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
8.2.5 Outdoor weather compensation sensor . . . . . . . . . . . . 70
8.2.6 Cylinder temperature sensor . . . . . . . . . . . . . . . . . . . . 71
8.2.7 Gas valve resistances . . . . . . . . . . . . . . . . . . . . . . . . . . 71
8.3 Heating function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8.4 Hot water cylinder function (optional integral
diverter valve kit fitted) . . . . . . . . . . . . . . . . . . . . . . . . .73
8.5 Protection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

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Worcester Greenstar 9i System ErP Specifications

General IconGeneral
BrandWorcester
ModelGreenstar 9i System ErP
CategoryBoiler
LanguageEnglish

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