Installation Requirements - WarmFlow Direct DI120UV User Instructions

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 12 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.
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.
This appliance must be installed vertically (not on its side) in a frost-free indoor location.
The installation of this appliance is subject to the Building Regulations:
England & Wales
Scotland
Northern Ireland
Republic of Ireland Technical Guidance Document Part L
The appliance and installation must be commissioned as described herein and the Guarantee
Registration section of the separate Cylinder Passport 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.
Building Regulation G3
Technical Standard P3
Building Regulations P5
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