If the appliance is installed where the temporary hardness of the water is high,
say over 150 ppm (as defined by BS 7593 1993 Table 2), the fitting of an in line
scale inhibitor is required. This must be comply with the requirements of the local
water company.
Devices capable of preventing the flow of expansion water: e.g. non return valves
and/or loose - jumpered stop cocks should not be fitted unless separate
arrangements are made for expansion water.
If a non-return valve is fitted in the incoming water supply - e.g. in line with scale
inhibitor then a D.H.W. expansion vessel MUST be obtained and fitted.
4.8 INSTALLATION IN A BATHROOM
The appliance is rated IPX4D
The boiler may be installed in any room or internal space, although particular
attention is drawn to the requirements of the current IEE (BS.7671) Wiring
Regulations and, in Scotland, the electrical provisions of the building regulations
applicable in Scotland, with respect to the installation of the boiler in a room or
internal space containing a bath or shower. For IE reference should be made to
the current ETCI rules for electrical installations and I.S. 8 13:2002
If the appliance is to be installed in a room containing a bath or shower then the
appliance can be installed in Zones 1 & 2, as detailed in BS. 7671. Although
consideration must also be given when fitting boilers within bathrooms to adhere
to the current gas safety regulations.
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