Worcester GR4700iW C

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6 720 891 161 (2020/09) UK/IE

Installation and Maintenance Instructions

Gas-fired condensing combi appliance

Greenstar 4000

GR4700iW C

Main Page

Table of Contents2
Explanation of Symbols and Safety Instructions4
Explanation of Symbols4
General Safety Instructions4
Regulations7
Product Information7
Scope of Delivery8
Declaration of Conformity8
Appliance Type Overview8
Product Identification9
Pipework Positions and Flue Outlet9
Product Overview10
Standard Accessories11
Appliance Accessories11
Programmer/Timer Accessories11
Pre-Installation12
System Preparation12
Artificially Softened Water12
Water Systems and Pipework12
System Layouts Examples13
System Fill14
Mains Supply14
Electrical Supply14
Gas Supply14
Water Supply15
Appliance Location and Clearances16
Appliance Location16
Rooms Containing a Bath or Shower17
Appliance Clearances17
Flue Systems Considerations19
Flue Length19
Flue Options19
Plume Management System22
Flue Terminal Positions22
Plume Re-Direct and Plume Management Terminal26
Positions26
Condensate Discharge28
Appliance Siphonic Condensate Trap28
Condensate Pipework28
Internal Connections28
External Connections29
Pressure Relief Discharge32
Pressure Relief Pipework32
Alternative PRV Connections - Combined Prv/Condensate32
Cleaning Primary Systems33
Flushing the System33
Installation34
Position the Appliance34
Mounting Frame Fixing35
Appliance Connections36
Hanging the Appliance37
Flue Turret/Adaptor Installation38
Electrical Connection39
Cable Preparations40
Installer Wiring Connections40
External Controls - Domestic Installations42
Commissioning42
Pre-Commissioning Checks42
Water Treatment42
Filling the Appliance and Adding Inhibitor43
Starting the Appliance43
Control Panel Overview43
Turning on the Appliance43
Operation43
Chimney Sweep Mode44
Setting the Appliance to Maximum44
Setting the Appliance to Minimum44
Exiting Chimney Sweep Mode44
Checking Gas Inlet Pressure44
Checking the Gas Rate45
Checking for Gas Leaks During Operation45
CO and Combustion Check46
Checking Flue Integrity47
Flue Gas Analysis47
Finishing Commissioning48
6.11.1 Appliance/Product Guarantee48
Settings in the Service Menu49
Operating the Service Menu49
Service Menu50
Overview of the Service Menu50
Benchmark and Info Menu52
Settings Menu53
Menu Function Check56
Reset Menu56
Menu Demo Mode56
Thermal Disinfection57
Inspection and Maintenance57
Inspection and Maintenance Considerations57
Component Access58
Checking Heat Exchanger Assembly58
Check Working Gas Inlet Pressure59
Flue Gas Analysis59
Checking the Flue Integrity59
Cleaning the Siphon and Heat Exchanger59
Checking the Electrodes and Cleaning the Heat Exchanger59
Cleaning the Condensate Trap62
Setting the Air/Gas Ratio63
Replacement Parts64
Component Access64
Draining the Appliance64
Removing the Heat Exchanger Assembly65
Checking the Strainer in the Cold Water Pipe and the Flow Turbine Operation65
Checking/Replacing the Motor of the 3-Way Valve66
Removing the Pump67
Replacing the Gas Valve68
Combi Boilers: Checking the Plate Heat Exchanger68
Replacing the Expansion Vessel68
Replacing the PRV68
Replacing the Pressure Sensor69
Pressure Gauge Removal69
Replacing the Control Unit69
Fault Finding and Diagnosis70
Operating and Fault Displays70
10.1.1 General Information70
10.1.2 Operating/Fault Code Table71
10.1.3 Faults that Are Not Displayed79
Environmental Protection and Disposal82
Data Protection Notice82
Technical Specifications/Logs83
Technical Data83
Energy Consumption86
13.2.1 Product Data on Energy Consumption86
Component Resistance Characteristics88
13.3.1 Sensor Values - Flow Temperature Sensor88
13.3.2 Sensor Values - DHW Temperature Sensor88
13.3.3 Sensor Values - Flue Overheat Thermostat88
13.3.4 Sensor Values - Heat Exchanger Assembly Temperate Limiter88
13.3.5 Sensor Values - Outside Temperature Sensor88
Code Plug88
Pump Characteristic Map of the Heating Pump89
Setting Values for Output89
13.6.1 Gas Setting Values89
Internal Wiring of the Appliance90
Gas Boiler System Commissioning Checklist and Warranty Validation Record92
Inspection and Maintenance Checklist93
Service and Interim Boiler Work Record94

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