A.O. Smith DURA-Power DRE-52, Installation And User Instructioins

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2. FOR THE INSTALLER
2.1 Installation procedures
The device may only be placed in a space
if this meets the valid national and local
regulations. This space must be frost free
or protected against frost.
The device may not be installed in damp
or wet areas. The insulation classi
fi cation
of the device is: IP X1
2.1.1 General Installation
The installation shall be carried out by
a recognised installation engineer in
accordance with the generally and locally
applicable regulations for electrical and
water companies.
2.1.2 Water Connections
The maximum permissible operating
pressure of the device is 8 bar (= 800 kPa).
On the cold water side the device must
have a shut off valve and approved inlet
combination. The inlet combination must
be
fi tted as closely as possible on the
device in accordance with the regulations.
The inlet combination must be allowed
to work regularly with the aim of avoiding
a blockage as a consequence of scale.
The drainage pipe of the inlet combination
must be
fi tted in such a way that it
constantly slopes upwards. A stop valve
or non-return valve must never be
fi tted
between the inlet combination and the
device.
During heating of the device, expansion
water (as a result of the temperature
increase) will drip into the drainage via the
over fl ow of the inlet combination. This is
a normal occurrence. The dripping must
never be obstructed and/or blocked. The
drain must remain free at all times with
regard to the surroundings.
The device must be provided with a
temperature and pressure protection
mechanism (T&P valve). This is supplied
with the device. The over
fl ow of the T&P
valve must be connected onto the drain.
When there is a water pipe pressure
greater than 8 bar (= 800 kPa) an
approved reduction device must also be
fi tted.. When replacing an old device with
a new one the inlet combination must also
be renewed.
2.1.3 Electrical Connection
The electrical connection may only
be made by a recognised installation
engineer in accordance with the valid
regulations of the energy company. This
device must be provided with an all pole
mains switch with a contact separation
of at least 3 mm if a
fi xed connection is
used.
Warning: The device must be earthed.