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3.0 INSTALLATION
Warning: this appliance must be earthed. It is suitable for a.c. supply only.
Electrical installation must be carried out by a competent electrician and be
in accordance with the latest IEE wiring regulation.
3.1 LOCATION
3.1.1 National Wiring rules may contain restrictions concerning the
installation of these units in bathrooms.
3.1.2 The unit should be located in close proximity to its outlet in order to
minimise heat losses in the pipework. The unit should be wall-mounted,
using the fixing hooks and plugs supplied. The wall fixing hooks should
be orientated such that the lugs engage with the mounting slots in the
rear of the unit (see Figure 01, page 3 for mounting hole dimensions).
The water connections must always be to the top of the unit. Ensure
the wall can support the full weight of the unit (see Section 2) and that
wall hooks are securely fixed.
3.1.3 Enough space should be left above the unit for pipe connections and
access to the Pressure Relief Valve (see Figure 01, page 3 for unit
dimensions to determine a suitable position for the heater).
3.1.4 Ensure that there are no hidden services (electricity, gas or water) below
the surface of the wall.
3.1.5 DO NOT install where the unit may freeze.
3.2 PLUMBING
3.2.1 The water connections are for 15mm diameter copper tubes suitable
for compression fittings. Do not use solder joints as this will damage
the heater and may prevent servicing.
3.2.2 The electrolytic connectors supplied are fitted between the inlet/outlet
threaded pipe ends and the 15mm compression fittings attached to the
supply/outlet pipework to prevent galvanic corrosion.
3.2.3 The INLET is marked BLUE, the OUTLET is marked RED. A WRAS
listed isolating valve (not supplied) should be fitted on the cold water
supply to the heater. Several hot outlets can be served.
3.2.4 Plumbers Paste must not be used as it can impair the operation of the
valves.
