Alpha CD18R User Manual

Installation and Servicing
Instructions
Alpha CD13R,18R and 24R
Wall Mounted, Fan Assisted, Room Sealed, Gas Fired,
High Efficiency Condensing Regular Boiler Range
Alpha CD13R G.C. No. 41 532 05
Alpha CD18R G.C. No. 41 532 03
Alpha CD24R G.C. No. 41 532 04
British Gas
Service Listed
For use with Natural Gas only
Leave these instructions with the User
Nepicar House, London Road,
Wrotham Heath, Sevenoaks,
Kent TN15 7RS
For Technical help or for Service call ...
ALPHA HELPLINE Tel: 0870 3001964
website:www.alpha-innovation.co.uk

Alpha CD18R Specifications

General

Brand	Alpha
Model	CD18R
Category	Boiler
Language	English

Summary

1 INTRODUCTION

2 TECHNICAL DATA

2.1 PERFORMANCE - NATURAL GAS

Technical performance specifications for Alpha CD boilers under natural gas.

3 GENERAL BOILER INFORMATION

3.1-3.3 SUPPLY & AIR REQUIREMENTS

Gas, electrical, and air supply requirements for the boiler.

3.5 FLUE TERMINAL LOCATION

Specifies minimum distances for flue terminal placement to ensure safety.

4 INSTALLATION

4.2 CLEARANCES REQUIRED

Specifies minimum installation clearances around the boiler.

4.5 CONNECT THE PIPEWORK

Procedure for connecting water and gas pipework to the boiler.

4.8 CONNECT THE MAINS SUPPLY

Detailed steps for connecting the boiler to the mains electrical supply.

5 COMMISSIONING

5.3 TEST FOR GAS SOUNDNESS AND PURGE THE SUPPLY

Steps for testing gas supply integrity and purging.

5.5 CHECK THE BURNER PRESSURES

Method for checking and verifying burner pressures.

6 BOILER OPERATION

7 ROUTINE SERVICING

7.1 IMPORTANT NOTES PRIOR TO SERVICING

Crucial safety and preparatory steps before performing service.

8 COMPONENT REPLACEMENT

8.14 PCB & HEAT EXCHANGER REPLACEMENT

Steps for replacing the PCB and primary heat exchanger.

9 WIRING DIAGRAMS

9.1 ILLUSTRATED WIRING DIAGRAM

A visual representation of the boiler's electrical connections.

9.2 FUNCTIONAL FLOW WIRING DIAGRAM

A diagram showing the flow of electrical signals within the boiler.

10 FAULT FINDING

10.1 INITIAL FAULT FINDING CHECKS

Basic checks to perform before diagnosing faults.

10.2 CENTRAL HEATING - OPERATIONAL SEQUENCE

A flowchart to diagnose central heating operational faults.

10.2 FAULT FINDING SOLUTIONS A TO E

Specific solutions for faults identified by sections A through E.

10.3 FAULT FINDING SOLUTIONS F TO I

Specific solutions for faults identified by sections F through I.

12 BENCHMARK CHECKLIST