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2 INSTALLATION REQUIREMENTS
Prior to installing this unvented hot water cylinder, please confirm that:
a) The mains water supply is capable of achieving a minimum flow rate of 20 litres per minute
at a minimum dynamic pressure of 1.5 bar at all times. If this performance cannot be
achieved the installation of an unvented cylinder may not be suitable.
b) The maximum mains supply pressure at any time does not exceed 16 bar. If this is the
case an additional ‘special’ pressure reducing valve (not supplied) may be required.
c) The mains water supply is from a public source (i.e. not from a private borehole) and that
the hardness of the water is less than 200 mg/litre. Where hardness in excess of 200
mg/litre is experienced, a suitable and effective hard water treatment must be installed.
The device should be rated for a flow rate of 50 litres per minute in order to maintain
maximum performance.
d) All circuits supplying heat to the heat exchanger coils of any cylinder (not applicable to
direct cylinders) are fully pumped (gravity circulation is NOT suitable).
e) The pipework supplying the hot water taps is capable of withstanding a maximum pressure
of 7 bar at a temperature of 90°C.
f) The mains water supply does not consistently contain a high proportion of suspended
matter that could block the strainer.
g) The mains water supply does not contain chloride levels that exceed 250mg/l.
h) This appliance must be installed vertically (not on its side) in a frost-free indoor location.
i) The cylinder will be placed on a floor area that is level and capable of supporting the
appliance when full of water.
j) All serviceable components must be accessible after installation.
k) The connection of additional pumps
The installation of this appliance is subject to the Building Regulations:
England & Wales Building Regulation G3
Scotland The Building Regulations (Scotland)
Northern Ireland Building Regulations (Northern Ireland)
Republic of Ireland Technical Guidance Document Part L
IEE Electrical Regulations
Local Water Regulations
Note: Other regulations may apply for other territories
The appliance and installation must be commissioned as described herein and the Guarantee
Registration completed and returned to the manufacturer.
FAILURE TO COMMISSION, REGISTER AND ANNUALLY SERVICE THIS
PRODUCT WILL INVALIDATE ALL GUARANTEES
Under no circumstances must the factory fitted temperature & pressure relief valve be
removed. Removal of the valve would create an extremely dangerous situation and
would invalidate all guarantees.
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