Worcester 35CDi User Manual

Supplied By www.heating spares.co Tel. 0161 620 6677
35CDi
WALL MOUNTED COMBINATION BOILER 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).
GC NUMBER 47 311 39 (N.G.) GC NUMBER 47 311 40 (L.P.G.)
CE 97/0086
APPLIANCE OUTPUTS
Natural Gas LPG (Propane)
Domestic Central Domestic Central
Hot Water Heating Hot Water Heating
Minimum 9.0 kW 9.0 kW 12.9 kW 12.9 kW
Maximum 35.17 kW 25.0 kW 35.17 kW 25.0 kW
IMPORTANT: THESE INSTRUCTIONS APPLY IN THE UK ONLY
AND 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.
35CDi

Worcester 35CDi Specifications

General

Model	35CDi
Output	35kW
ERP Rating	A
Domestic Hot Water Output	35kW
Max Working Pressure	3 bar
Fuel Type	Natural Gas

Summary

Installation Regulations

Introduction to the Worcester Bosch 35CDi

Electrical Supply Requirements

Gas Supply Specifications

Safety Features and Precautions

Lists safety precautions and features such as casing cover, frost protection, and pump seizure protection.

Technical Data

Domestic Hot Water System

Gas Supply Installation

Electrical Connections and Supply

Installation Procedures

Boiler Installation and Ductwork

Details boiler mounting, duct fitting, and preparation steps for flue and air connections.

Final Installation Completion Steps

Covers final checks, refitting covers, testing gas soundness, and setting controls.

Commissioning the Appliance

Domestic Hot Water Circuit Flushing

Central Heating System Flushing

Gas and Electricity Supply Checks

System Filling and Venting Procedures

System Pressure Setting and Checks

Burner Pressure and Output Verification

Checks burner ignition and pressure settings for both minimum and maximum outputs.

Commissioning Completion Steps

Inspection and Servicing Guide

Servicing Requirements

Emphasizes the need for annual servicing by qualified engineers for efficient operation.

Inspection Procedures

Component Access for Servicing

Replacement of Parts

Safety, Access and Draining Procedures

Covers essential safety precautions, component access, and system draining before part replacement.

Gas and Ignition System Parts Replacement

Procedures for replacing gas valve, electrodes, burner, and manifold assembly.

Water System Components Replacement

Control and Electrical Parts Replacement

Instructions for replacing control board, transformer, programmer, pumps, and sensors.

Air System Components Replacement

Fault Finding Guide

Preliminary Checks

Fault Finding Chart

A diagnostic chart correlating indicator light situations with specific faults and actions.

Fail Point G-K Troubleshooting