are required from the pump to supply the top levels
of a high-rise building to overcome the high static
distance to the highest sprinkler ranges. This means
that the pressures to the lower ranges will be higher
than the system components and sprinkler head can
handle. Conventional installation procedures cannot
be applied and the contractor has the option of
fitting pressure reducing valves or zoning the area to
eliminate high pressures on the lower ranges. As
pressure-reducing valves are not recommended for
this purpose under many fire authority rules and the
rules specifically state that they should only be used
for this application when absolutely necessary,
zoning becomes the correct method of installation,
with European EN12845 rules also insisting on a
maximum zone height of 45m.
The way of meeting these requirements with an
approved and listed fire pump is by utilising one
single multi-stage, multi-outlet pump. This pump
has outlets at various stages of the pump, which
will pump up to various levels of the building
through the separate risers.
ESFR installations
Developments in sprinkler head technology have
increased the need for specialised fire pumps for
specialist types of sprinkler heads. ESFR sprinklers
were developed in the 90's to protect many com-
monly used storage arrangements. Formerly these
applications would have been protected with in-
rack sprinklers and ceiling protection but ESFR
sprinklers removed the need for in-rack sprinklers
and produced a solution that called for ceiling pro-
tection only. Because of the nature of this head,
design principles and operating characteristics differ
from conventional sprinkler protection. A technical
bulletin (TB209) was developed in the Uk to
enhance EN12845, that specifies the requirements
and recommendations for the installation of ESFR
sprinklers. TB209 lays out special requirements that
are only applied when ESFR sprinklers are utilised,
specifying special selection criteria for the pumps
that are applied only when utilising ESFR heads.
Factory assembled packaged pump
houses
Pre-assembled pump house packages are becoming
commonplace with many supermarket and D.I.Y.
chains insisting on factory built pump house
packages. Major industrial users are also seeing the
benefit of fabricating the package under factory
conditions and insisting on this type of pump house
construction. The package requires the pumps to be
installed within a custom built housing with all the
required pipework, valves, test lines, louvres, heating
and lighting normally supplied in a conventional site-
constructed pump house. The pre-assembled units
are designed in accordance with the applicable fire
rules and regulations and where necessary the
applied national construction standards. With all the
associated advantages, the factory assembled and
tested pump house has become much more con-
venient to install for both the end user and
contractor. The completed unit is offloaded directly
on to a pre-cast plinth and the contractor simply
needs to secure the unit to the plinth, provide the
electric supply into the pump house and pipe in
the pumps' water supply. This method of supply
significantly reduces the on-site installation time of
the pump house and allows the contractor to focus
on other parts of the installation. IFP
INTERNATIONAL FIRE PROTECTION 45
Metron Eledyne Ltd
18 Autumn Park, Dysart Road, Grantham
LINCS NG31 7DD, United Kingdom
Tel: +44 (0)1476 516120 Fax: +44 (0) 1476 516121
E-mail: info@metroneledyne.co.uk
Web: www.metroneledyne.co.uk
Diesel Engine Controllers
In a wide range of applications including Fire Pump,
Industrial Pump and Gen-set.
Electric Motor Controllers
For all applications using direct on line, star delta, auto
transformer and variable frequency drive starting
methods. Up to 11kV. All produced to various worldwide
standards including LPC, UL and FM.
Power Distribution Equipment
Including HV and LV panel boards, sub-distribution, switch
boards, battery tripping units and packaged sub-stations.
After Sales Service
We offer a complete after
sales service including:
Commissioning
Maintenance Contracts
On-site Repairs
Spare Parts
FD4e diesel controller
FM Approved, UL Listed
NEW!
CONTROL PANEL
MANUFACTURERS

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