Worcester Greenstar 12Ri User Manual

UK/IE
INSTRUCTION MANUAL
INSTALLATION, COMMISSIONING & SERVICING
WALL HUNG RSF GAS FIRED CONDENSING BOILER
FOR OPEN VENTED AND SEALED CENTRAL HEATING SYSTEMS AND
INDIRECT MAINS FED DOMESTIC HOT WATER
THIS BOILER IS USED WITH
NATURAL GAS OR LPG (Cat II 2H3P TYPE C13, C33 & C53)
NATURAL GAS 12 Ri GC NUMBER: 41 311 63
15 Ri GC NUMBER: 41 311 75
18 Ri GC NUMBER: 41 311 77
24 Ri GC NUMBER: 41 311 65
LIQUID PETROLEUM GAS 12 Ri GC NUMBER: 41 311 64
15 Ri GC NUMBER: 41 311 76
18 Ri GC NUMBER: 41 311 78
24 Ri GC NUMBER: 41 311 66
GREENSTAR 12Ri, 15Ri, 18Ri & 24Ri

Worcester Greenstar 12Ri Specifications

General

Boiler Type	Regular
Output	12 kW
Fuel Type	Gas
ERP Rating	A
Max. Working Pressure	3 bar
Gas Type	Natural Gas
Efficiency Rating	A

Summary

Safety and Regulations

Safety Precautions for Gas Leaks

Safety advice for gas leaks, handling materials, and general appliance safety.

Installation Regulatory Compliance

Details regulatory requirements for gas safety, electrical, and building standards.

Appliance Information Overview

Boiler Package Contents and Specifications

Technical Data

Mains Supply Requirements

Condensate Pipework Installation

Boiler Location and Clearances

Flue Options and Lengths

Flue Terminal Positions and Clearances

Wall Mounting Plate and Flue Opening

Boiler Connections Guide

Flue Installation Steps

Condensate, Gas & Water Connections

Electrical Connections

Pre-Commissioning Checks

Filling the Heating System

Starting the Appliance

Commissioning Procedures

Checking Gas Inlet Pressure

Procedure to check gas inlet pressure and ensure it meets required specifications.

Setting Boiler to Maximum Output

Instructions on how to set the boiler to maximum output for testing.

Finishing Commissioning Steps

Inspection and Service Tasks

Primary Heat Exchanger Maintenance

Setting Boiler to Maximum for Testing

Procedure to set the boiler to maximum output for testing and measurement.

Setting the Air/Gas Ratio

Setting Air/Gas Ratio for SIT Valve

Setting CO/CO2 Levels for SIT Valve

Procedure to set and measure CO/CO2 levels for the SIT 848.093 Sigma valve.

Setting Air/Gas Ratio for DUNGS Valve

Setting CO/CO2 Levels for DUNGS Valve

Procedure to set and measure CO/CO2 levels for the DUNGS GB-ND 055 D01 S20 valve.

Replacement of Parts - General

Replacing the Primary Sensor

Procedure for replacing the primary sensor, including connector and paste application.

Replacing the Overheat Thermostat

Replacing the Flue Limit Thermostat

Replacement of Parts - Valve and Syphon

SIT and DUNGS Valve Replacement

Gas Valve Replacement Procedure

Instructions for isolating supplies and replacing the gas valve, checking soundness.

Replacement of Parts - Controls

Transformer and PCB Replacement

Replacement of Parts - Manifold and Switch

Air/Gas Manifold and Fan Assembly Removal

Pressure Switch Replacement

Replacement of Parts - Fan, Electrodes, Burner, HX

Fan Replacement Procedure

Electrode Assembly Replacement

Burner Replacement Instructions

Heat Exchanger Removal

Gas Conversion Process

Code Plug Replacement for Conversion

Electrical Wiring Diagram

Fault Finding Guide

Main Function and Protection Systems