Worcester 24ijunior

24i / 28i jjuunniioorr
WALL MOUNTED COMBINATION BOILERS FOR CENTRAL HEATING
AND MAINS FED DOMESTIC HOT WATER
INSTALLATION AND
SERVICING INSTRUCTIONS
This appliance is for use with Natural Gas or LPG (Cat II 2H3P TYPE C12 & C32)
24i GC NUMBER 47 311 69 (N.G.) GC NUMBER 47 311 71 (L.P.G.)
28i GC NUMBER 47 311 70 (N.G.) GC NUMBER 47 311 72 (L.P.G.)
GB/IE
APPLIANCE OUTPUTS
Domestic Central
Hot Water Heating
24i 28i
Minimum 7.5 kW 8.0 kW
Maximum 23.5 kW 27.5 kW
IMPORTANT: THESE INSTRUCTIONS MUST BE LEFT WITH THE USER OR AT
THE GAS METER
Read the instructions before starting work - they have been written to
make the installation easier and prevent hold-ups.

Worcester 24ijunior Specifications

General

Mounting	Wall-mounted
Output	24 kW
Gas Type	Natural Gas
Dimensions (HxWxD)	700 x 390 x 280 mm
Domestic Hot Water Flow Rate	9.8 l/min
Hot Water Flow Rate at 35°C Rise	9.8 l/min
Central Heating Flow Temperature Range	30-80°C
Fuel Type	Gas
Type	Combination boiler

Summary

Installation and Servicing Instructions

Installation Regulations

Rules and standards for appliance installation.

Introduction

Overview of the Benchmark initiative and general information.

Technical Data

Specifications, outputs, and dimensions of the appliance.

Siting the Appliance

Guidance on choosing the correct location for the boiler.

Flue Terminal Positions

Requirements for flue terminal placement and clearances.

Air Supply

Requirements for combustion air supply to the appliance.

Sealed System

Guidelines for installing a sealed central heating system.

Open Vent System

Statement on appliance suitability for open vent systems.

Domestic Hot Water

Installation requirements for domestic hot water connections.

Gas Supply

Requirements for gas supply, pressure, and pipework.

Electrical

Electrical supply requirements and safety checks.

Installing The Appliance

Step-by-step guide for physically installing the boiler.

Commissioning The Appliance

Procedures for filling, venting, and setting up the system.

Hand Over

Instructions for explaining operation and maintenance to the user.

Inspection And Service

Routine checks and maintenance procedures for the appliance.

Replacement Of Parts

Instructions for safely replacing various boiler components.

Short Parts List

List of available spare parts and their part numbers.

Operational Flow Diagrams

Visual representation of the appliance's operational logic.

Fault Finding

Troubleshooting guide for common appliance faults and errors.

Conversion Instructions

Steps for converting the appliance between Natural Gas and LPG.