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SAfe HAndlinG of SUbStAnCeS
No asbestos, mercury or CFCs are included in any part of the
boiler or its manufacture.
loCAtion of boileR
The boiler must be installed on a flat and vertical wall, capable of
adequately supporting the weight of the boiler and any ancillary
equipment.
The boiler must not be fitted outside.
GAS SUPPly
The local gas supplier should be consulted, at the installation
planning stage, in order to establish the availability of an adequate
supply of gas. An existing service pipe must NOT be used without
prior consultation with the local gas supplier.
A gas meter can only be connected by the local gas supplier or by
a Gas Safe Registered Engineer or in IE by a competent person.
An existing meter should be checked, preferably by the gas
supplier, to ensure that the meter is adequate to deal with the
rate of gas supply required. A minimum working gas pressure of
17.5mbar MUST be available at the boiler inlet for Natural gas
Do not use pipes of smaller size than the boiler inlet gas
connection.
The complete installation MUST be tested for gas soundness and
purged in accordance with the appropriate standards listed on
page 8.
flUe inStAllAtion
Individual air supply and flue outlet pipes are used. The material
used for the flue outlet and the air intake systems, must be
muPVC to BS 5255. In addition the flue outlet and air intake
pipework must be marked BSEN 1566-1 and the fittings must be
marked BSEN 1329. Marley muPVC Solvent Weld Waste System
(50mm), Polypipe System 2000 muPVC Solvent Weld Waste
System (50mm) and Polypipe Terrain 200 muPVC Solvent Weld
Waste System are recommended. do not USe AbS PiPe oR
fittinGS.
iMPoRtAnt
It is the responsibility of the installer to ensure, in practice, that
products of combustion discharging from the terminal cannot
re-enter the building or any other adjacent building through
ventilators, windows, doors, other sources of natural air infiltration,
or forced ventilation / air conditioning.
If this should occur the appliance MUST be turned OFF, labelled
as 'unsafe' and corrective action taken.
Where the lowest part of the terminal is fitted less than 2m (80")
above a balcony, above ground or above a flat roof to which
people have access then the terminal MUST be protected by a
purpose designed guard. The minimum spacing between the
balcony and the terminal should be 75mm, in order to allow a
terminal guard to be fitted.
Terminal guards are available from boiler suppliers
Ensure that the guard is fitted centrally.
The air inlet/products outlet duct and the terminal of the
boiler MUST NOT be closer than 25mm (1") to combustible
material. Detailed recommendations on the protection of
combustible material are given in BS. 5440-1: 2008. In IE refer to
I.S.813:2002.
The flue must be installed in accordance with Building
Regulations and the recommendations of BS. 5440-1:2008 for
inputs up to 70kW nett.
Keston Heat -
Installation & Servicing
GENERAL
WAteR CiRCUlAtion SySteM
The boiler must NOT be used for direct hot water supply. The hot
water storage cylinder MUST be of the indirect type.
Single feed, indirect cylinders are not recommended and MUST
NOT be used on sealed systems.
The appliances are NOT suitable for gravity central heating nor
are they suitable for the provision of gravity domestic hot water.
The hot water cylinder and ancillary pipework, not forming part of
the useful heating surface, should be lagged to prevent heat loss
and any possible freezing - particularly where pipes run through
roof spaces and ventilated underfloor spaces.
The boiler must be vented.
Draining taps MUST be located in accessible positions, which
permit the draining of the whole system - including the boiler
and hot water storage vessel. They should be at least 1/2" BSP
nominal size and be in accordance with BS. 2879.
The central heating system should be in accordance with the
relevant standards listed on page 8.
The Keston boilers feature an integral circulating pump which
has sufficient excess head to drive most domestic systems. The
available head is indicated in the chart below. If the system
resistance, at the desired flow rate, is in excess of the available
head from the integral pump an additional system pump will be
required.
Keston Heat 55 - Hydraulic System Capacity
Keston Evomax 55 - Hydraulic System Capacity
8
7
6
5
4
3
2
1
0
25
30
Keston Heat 45 - Hydraulic System Capacity
Keston Evomax 45 - Hydraulic System Capacity
8
7
6
5
4
3
2
1
0
25
30
Available System Capacity
20 deg C differential
15 deg C differential
35
40
45
50
55
60
Water Flow Rate [L/m]
Available System Capacity
20 deg C differential
15 deg C differential
11 deg C differential
35
40
45
50
55
60
Water Flow Rate [L/m]
65
70
65
70
continued . . . . . .
9
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