2
Alpha CB24/28 - Contents/Introduction
CONTENTS
1
Introduction ....................................... 2
2
Technical data ................................... 3
3
General boiler information .................. 6
4
Installation ......................................... 10
5
Commissioning ................................. 15
6
Boiler operation ................................. 17
7
Routine servicing ............................... 18
8
Component replacement ................... 20
9
Wiring diagrams ................................ 27
10 Fault finding ...................................... 29
11 Short parts list ................................... 33
12 Service history .................................. 34
The Alpha CB range of boilers are wall mounted, fan assisted room-sealed combination boilers. The burner is lit electronically
and the heat output is controlled by a modulating gas valve.
The boilers, providing both central heating and domestic hot water at mains pressure, are designed for use with a fully
pumped, sealed and pressurised heating system using only Natural Gas.
The boilers are supplied with a pump, diverter valve, pressure relief valve, expansion vessel and pressure gauge fully
assembled and tested.
As supplied, the Alpha CB24 boilers will automatically modulate to provide central heating outputs between 9.3 and 23.3 kW
(31 700 and 79 500 Btu/h). The Alpha CB28 boilers will provide central heating outputs between 11.2 and 28.0 kW (38 200
and 95 500 Btu/h).
The maximum output available for domestic hot water is 23.3 kW (79 500 Btu/h), capable of providing 9.5 litres/min with a
temperature rise of 35°C for the Alpha CB24 boilers, and 28.0 kW (95 500 Btu/h), capable of providing 11.4 litres/min with a
temperature rise of 35°C for the Alpha CB28 boilers.
IMPORTANT
It is the law that all gas appliances are installed by a competent person, ie CORGI registered personnel, in accordance with
the following recommendations:-
Current Gas Safety (Installation and Use) Regulations
All current Building Regulations issued by the Department of the Environment, i.e. Approved Document L1
Building Standards (Scotland) (Consolidation) Regulations issued by the Scottish Development Department
UK Water Regulations/Byelaws (Scotland)
Health & Safety Document No. 635 (The Electricity At Work Regulations 1989)
The installation should also be in accordance with the following British Standard Codes of Practice:-
BS 5440:1:2000
Flues
BS 5449:1990
Forced circulation hot water systems
BS 5546:2000
Installation of hot water supplies for domestic purposes
BS 6700:1997
Design, installation, testing and maintenance of services supplying water
BS 6798:2000
Installation of gas fired hot water boilers
BS 6891:1998
Gas installation
BS 7593:1992
Code of Practice for treatment of water in heating systems
BS 7671:2001
Requirements for electrical installations, IEE Wiring Regulations
If installation is in a timber framed building, refer to the Institute of Gas Engineers document IGE/UP/7.
This appliance meets the requirements of IPX4D, ie degree of protection against moisture.
Failure to install this appliance correctly could lead to prosecution. It is in your own interest and that of safety to ensure that the
law is complied with.
Manufacturer's instructions must NOT be taken in anyway as over-riding statutory obligations.
Note: Ensure that the Benchmark Log Book has been completed after the boiler has been installed and commissioned.
1
INTRODUCTION
Summary of Contents for Alpha CB24
Page 27: ...27 9 1 ILLUSTRATED WIRING DIAGRAM Alpha CB24 28 Wiring Diagrams 9 WIRING DIAGRAMS...
Page 28: ...28 Alpha CB24 28 Wiring Diagrams 9 2 FUNCTIONAL FLOW WIRING DIAGRAM...
Page 30: ...30 Alpha CB24 28 Fault Finding 10 3 DOMESTIC HOT WATER Follow operational sequence...
Page 31: ...31 Alpha CB24 28 Fault Finding 10 4 FAULT FINDING SOLUTIONS A to F...
Page 32: ...32 Alpha CB24 28 Fault Finding 10 5 FAULT FINDING SOLUTION SECTIONS G to L...
Page 35: ...35 Alpha CB24 28...