Practically ANY HEATING OUTPUT
Because of its modular design the Keston lends itself to almost any required heating output by way of multiple unit installations for
larger commercial or industrial applications and the benefits over a single commercial boiler are immense. The Keston modular
system is perfect for decentralisation programmes now happening in many commercial installations such as hospitals and
universities where one large commercial boiler is being replaced. From initial purchase through to installation, running and
maintenance, the Keston saves money, time, valuable space and aggravation.
In many commercial applications the Keston modular system has proved to be far less expensive to buy or install than the
equivalent output single commercial boiler.
Hydraulic SYSTEM DESIGN
● The Keston commercial boilers suitable for use on open,
vented water systems with combined feed and vent. It is
preferable for use on sealed water systems, provided the
appropriate components required are included in the
system.
● The Keston commercial boilers do not incorporate a
system safety valve or system expansion vessel. Correctly
sized and rated safety valve(s) and expansion vessel(s)
must be provided by the installer.
● The hot water storage vessel, if applicable, must be of
the indirect type, direct cylinders must not be used. The
Keston Spa unvented calorifier range is ideally suited to
the Keston commercial boiler.
● Multiple Keston commercial
boilers can be installed to meet
any required heating output. The
implementation of a balance
header is recommended to
ensure adequate water
circulation is maintained through
the boiler by the boiler shunt
pumps (integral on Keston 260
and Keston 340), irrespective of
system conditions. Suitable
balance header assemblies are
available from Keston Boilers as
an optional extra.
● The Keston 260 and Keston 340 boilers are supplied
complete with integral boiler shunt pumps. However,
these pumps are sized purely to provide adequate flow
rate through the boiler at the pressure drop caused by
the boiler itself. No allowance has been provided in the
shunt pump size for system resistance. A system pump(s)
should therefore be selected sized to provide the
required system flow rate at the pressure drop created
by the system index circuit.
(28 pages)
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