Worcester Greenstar 8000 Style GR8700iW 30 C, Installation And Maintenance Instructions Manual

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Table of contents
3
Greenstar 8000 Style – 6720883864 (2019/02)
1 Explanation of symbols and safety instructions
1.1 Explanation of symbols
Warnings
In warnings, signal words at the beginning of a warning are used to
indicate the type and seriousness of the ensuing risk if measures for
minimising danger are not taken.
The following signal words are defined and can be used in this document:
DANGER:
DANGER indicates that severe or life-threatening personal injury will
occur.
WARNING:
WARNING indicates that severe to life-threatening personal injury may
occur.
CAUTION:
CAUTION indicates that minor to medium personal injury may occur.
NOTICE:
NOTICE indicates that material damage may occur.
Important information
The info symbol indicates important information where there is no risk to
people or property.
Additional symbols
Table 1
9 Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
9.1 Draining the appliance . . . . . . . . . . . . . . . . . . . . . . . . . .63
9.2 Overheat thermostat removal . . . . . . . . . . . . . . . . . . . .64
9.3 Pressure sensor removal . . . . . . . . . . . . . . . . . . . . . . . .64
9.4 Pressure relief valve removal . . . . . . . . . . . . . . . . . . . . .64
9.5 Replacing the gas valve . . . . . . . . . . . . . . . . . . . . . . . . .64
9.6 Checking the strainer in the cold water pipe and
the flow turbine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
9.7 Checking/replacing the motor of the 3-way valve. . . . .65
9.8 Replacing the 3-way valve . . . . . . . . . . . . . . . . . . . . . . .66
9.9 Replacing the plate heat exchanger. . . . . . . . . . . . . . . .66
9.10 Following inspection/maintenance . . . . . . . . . . . . . . . .66
10 Fault finding and diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
10.1 Operating and fault displays . . . . . . . . . . . . . . . . . . . . .66
10.1.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
10.1.2 Fault code table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
10.1.3 Faults that are not displayed . . . . . . . . . . . . . . . . . . . . .68
11 Environmental protection and disposal . . . . . . . . . . . . . . . . .69
12 Technical Specifications/Logs . . . . . . . . . . . . . . . . . . . . . . . . .69
12.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
12.1.1 Specifications Combi . . . . . . . . . . . . . . . . . . . . . . . . . . .69
12.2 Ionisation current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
12.3 Component resistance characteristics . . . . . . . . . . . . .73
12.3.1 Sensor values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
12.4 Code plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
12.5 Pump characteristic map of the heating pump . . . . . . .73
12.6 Setting values for central heating output . . . . . . . . . . .74
12.7 Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
12.8 Gas boiler system commissioning checklist . . . . . . . . .77
12.9 Inspection and maintenance checklist . . . . . . . . . . . . .78
12.10 Service record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Symbol Meaning
▶ a step in an action sequence

a reference to a related part in the document
• a list entry
– a list entry (second level)