Worcester Greenstar 8000 Life Installation And Maintenance Instructions Manual page 3

8 Inspection and maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . .60
8.1 Inspection and maintenance considerations . . . . . . . .60
8.2 Resources for inspection and maintenance . . . . . . . . .60
8.3 Inspection and maintenance steps . . . . . . . . . . . . . . . .60
8.4 Component access. . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
8.5 Fan pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
8.6 Check working gas inlet pressure . . . . . . . . . . . . . . . . .62
8.7 Flue gas analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
8.8 Checking the flue integrity . . . . . . . . . . . . . . . . . . . . . . .63
8.9 Cleaning the siphon and heat exchanger . . . . . . . . . . .63
8.9.1 Checking the burner. . . . . . . . . . . . . . . . . . . . . . . . . . . .63
8.9.2 Checking the non-return valve in the air-gas
manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
8.9.3 Fan removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
8.9.4 Cleaning the heat exchanger . . . . . . . . . . . . . . . . . . . . .65
8.9.5 Checking electrodes. . . . . . . . . . . . . . . . . . . . . . . . . . . .67
8.9.6 Cleaning the siphon . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
8.10 Setting the air/gas ratio . . . . . . . . . . . . . . . . . . . . . . . . .68
8.10.1 Checking and, if required, adjusting the gas/air
ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
9 Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
9.1 Draining the appliance . . . . . . . . . . . . . . . . . . . . . . . . . .71
9.2 Overheat thermostat removal . . . . . . . . . . . . . . . . . . . .71
9.3 Pressure sensor removal . . . . . . . . . . . . . . . . . . . . . . . .71
9.4 Pressure relief valve removal . . . . . . . . . . . . . . . . . . . . .72
9.5 Replacing the gas valve . . . . . . . . . . . . . . . . . . . . . . . . .72
9.6 Checking the strainer in the cold water pipe and
the flow turbine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
9.7 Checking/replacing the motor of the 3-way valve. . . . .73
9.8 Replacing the 3-way valve . . . . . . . . . . . . . . . . . . . . . . .73
9.9 Replacing the plate heat exchanger. . . . . . . . . . . . . . . .74
9.10 Following inspection/maintenance . . . . . . . . . . . . . . . .74
10 Fault finding and diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
10.1 Operating and fault displays . . . . . . . . . . . . . . . . . . . . .74
10.1.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
10.1.2 Fault code table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
10.1.3 Faults that are not displayed . . . . . . . . . . . . . . . . . . . . .81
11 Environmental protection and disposal . . . . . . . . . . . . . . . . .83
Greenstar 8000 Life - 6720883865 (2021/11)
12 Technical Specifications/Logs . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.1 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.1.1 Specifications Combi. . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.2 Ionisation current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
12.3 Component resistance characteristics . . . . . . . . . . . . . 88
12.3.1 Sensor values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
12.4 Code plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
12.5 Pump characteristic map of the heating pump. . . . . . . 88
12.6 Limiting nominal heat output (range rating)
(Service function 3-b1) . . . . . . . . . . . . . . . . . . . . . . . . . 88
12.7 Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
12.8 Gas Boiler System Commissioning Checklist and
Warranty Validation Record. . . . . . . . . . . . . . . . . . . . . . 92
12.9 Inspection and maintenance checklist . . . . . . . . . . . . . 93
12.10 Service and Interim Boiler Work Record. . . . . . . . . . . . 94
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