CIBSE Journal February 2010

Heating Industrial and commercial 2
> commissioning and maintenance are not addressed in and troubleshooting. The operating strategy of heating
BS EN 12828. plant is covered with specifi c reference to the use of
The changes to the Building Regulations in 2006 controls. Various strands of legislation that affect the
imposed more stringent requirements for energy design of the heating system are explained, such as
efficiency and carbon emission reduction, which Part L of the Building Regulations.
apply to both new and existing buildings. This imposes Drivers for refurbishment are also looked at – for
additional requirements for designers and installers example, failure of existing heating plant; the need to
who are upgrading existing systems. improve plant performance, reduce carbon emissions,
What was once a simple boiler replacement now improve reliability or maintainability or reduce fuel
needs more thought and detailed knowledge of the costs; the need to provide for changes to the heating
building, the system and its controls to enable the load due to an extension, or in order to take advantage
engineer not only to comply with the Regulations, but of energy effi ciency measures. Teekaram adds: 'We
also to implement an effi cient and effective system. suggest within the guide that refurbishment could
In addition, to ensure that boilers comply with the either be minor, major or complete – essentially,
regulations, extra measures may need to be taken, such ripping out and replacing the entire heating system.'
as improvement in operating temperature controls and The refurbishment section covers a wide range of
zoning. Existing heating systems are highly diverse activities including redesign/replacement of the entire
in design and this can mean that some are relatively heating system; replacement of heat emitters, controls,
simple to upgrade whilst others present much more burners, boilers or pumps, drives or valves; conversion
of a challenge. of constant volume circuits to variable volume;
Knowledge of the types and designs of existing replacement/rerouting of boiler fl ues; installation of
systems, their initial design criteria and their limits metering devices, and the provision of boiler house/
will help the engineer to make the correct decisions, plant room ventilation and combustion air openings.
Teekaram says. Says Teekaram: 'The reason we have made this
AM14 contains two major sections which deal section so comprehensive is that a lot of work is done
with design decisions and criteria for new buildings on the refurbishment of boilers and there is no detailed
and refurbishment. The rest of the guide is built guidance to assist the designer in what to look for when
around these two sections. For example, it examines deciding on refurbishing.' ●
the major components of heating systems which
would be applicable to both new build projects and AM14 is priced at £35 for CIBSE members and £70 for
refurbishments. The same applies to specifi c guidance non-members. For more information, or to order, call
on controls, installation, testing and commissioning 020 8772 3618 or visit www.cibse.org/publications
CIBSE AM14: design, installation and more
Design decisions and criteria:
• Avoiding excessive boiler cycling
new buildings
• Demand-based boiler control and
• Strategic design decisions
system inhibit
• Design criteria for boilers in new buildings
• Boiler sequence control
• Burner controls
Design decisions and criteria:
• Time controls
refurbishment • Temperature controls
• Drivers for refurbishment • Hot water controls
• Scope for refurbishment
Major components of
• Constraints
• Statutory regulations and guidance
heating systems
• Identiﬁ cation of existing heating types
• Heat sources (boilers)
• Evaluation of existing heating systems
• Distribution network
• Evaluation of heating loads
• Heat emitters
• Reducing energy consumption
• Flue and chimney design
• Options for refurbishment using low
• Air supply and ventilation
carbon technologies
• Fuel storage
• Whole life costs and payback
Installation
• Performance criteria for replacement
• Legislation and guidance
boiler plant
• Site facilities
Controls
• On-site storage and protection
• Circuit design
of equipment
• Boiler controls
58 CIBSE Journal February 2010 www.cibsejournal.com
CIBSEfeb10 pp56-59 feature_Boilers.indd 58 29/1/10 14:33:03
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