Ariston Thermo FLAT PW, Manual

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EN
30 31
The wall-mounting fastening hooks must be designed to support a weight that is three times higher than the
weight of the water heater filled with water.
Fastening hooks with a diameter of at least 12 mm (Fig. 3) are recommended.
We recommend installing the appliance ( A Fig. 1) as close as possible to the delivery points to minimise
heat loss along the pipes.
Local regulations may provide for restrictions on installation in bathrooms; observe any regulatory minimum
distances.
To facilitate maintenance, make sure there is a clearance of at least 50 cm inside the enclosure for access
to the electrical equipment.
Hydraulic connection
Connect the water heater’s inlet and outlet with pipes or fittings that are able to withstand temperature in
excees of 90 °C at a pressure exceeding that of the working pressure. Therefore, we advise against the use
of any materials which cannot resist such high temperatures.
Screw a “T” piece union to the water inlet pipe with the blue collar. On one side of the “T” piece union, screw
a tap for draining the appliance that can only be opened with the use of a tool (
B
fig. 2). On the other side of
the “T” piece union screw the safety valve supplied (
A
fig. 2).
CAUTION! For those nations that have taken on European norm EN 1487, the pressure safety device
pro- vided with the product does not comply with that norms. According to the norm, the device must
have a maximum pressure of 0.7 MPa (7 bar) and have at least: a cut-off valve, a non-return valve, a
control mechanism for the non-return valve, a safety valve and a water pressure shut-off device.
Some countries may require the use of alternative safety devices, as required by local law; the installer must
check the suitability of the safety device he tends to use. Do not install any shut-off device (valve, cock, etc.)
between the safety unit and the heater itself.
The device relief must be connected to a relief pipe that has a diameter at least identical to the one of the
equipment connection. Use a funnel that creates an air gap of at least 20 mm and allows visual checks so
that no personal injury, property damage or damage to animals will occur in case of safety device enabling.
The manufacturer will not be held responsible for such damage. Connect the inlet of the pressure safety
device to the cold water system using a flexible pipe, using a cut-off valve if necessary ( D fig. 2). In addition,
a water discharge tube on the outlet C fig. 2 is necessary if the emptying tap is opened.
When tightening the pressure safety device, do not over tighten and do not tamper with it. It is normal
for water to trickle from the tap during the heating phase; for this reason, it is necessary to connect the
drain, which must always be left exposed to the atmosphere, with a drainage pipe that is installed sloping
downwards in a place with no ice. If the network pressure is closed to the calibrated valve pressure, it will
be necessary to apply a pressure reducer far away from the appliance. To avoid any possible damage to the
mixer units (taps or shower) it is necessary to drain any impurities from the pipes. The appliance must not
be supplied with water of hardness less than 1 2°F, nor with especially hard water (greater than 25 °F); we
recommend installing a water softener, properly calibrated and controlled - do not allow the residual hard-
ness to fall below 15 °F. Before using the appliance, we recommend filling its tank with water and draining it
completely so as to remove any residual.
Electrical connection
Before performing any operations, disconnect the appliance from the electricity mains using the
external switch.
Before installing the appliance it is recommended to thoroughly check the electrical system to verify compliance
with established regulations; the manufacturer is not liable for damage caused by lack of grounding or
anomalous power supply.
Check that the system is suitable for the maximum power absorbed by the water heater (please refer to the data
plate) and that the cross-section of the electrical connection cables is suitable and complies with current laws.
The use of multiplugs, extensions or adaptors is strictly prohibited.
It is strictly forbidden to use the piping from the plumbing, heating and gas systems for the appliance earthing
connection.
If the appliance is supplied with a power supply cable, should the latter need replacing, use a cable featuring
the same characteristics (type H05VV-F 3x1.5 mm 2 , 8.5 mm in diameter. The power cord (H05 V VF 3x1.5
mm 2 diameter 8.5 mm) must be positioned in the special seat in the back of the appliance until it reaches the
terminal (
M
Fig. 7) then lock the individual wires, tightening the appropriate screws. Secure the power cord with
the included cable clamp.
To disconnect the unit from the electrical supply use a bipolar, switch conforming to CEI-EN standards
(contact opening at least 3 mm, better if equipped with fuses).
The appliance must be earthed and the earth cable (which must be yellow-green and longer than that of the
phases) is fixed to the terminal marked by the symbol (
G
Fig. 7).
Before starting up the appliance, check that the power rating matches that given on the appliance nameplate.
If the appliance is not supplied with a power supply cable, choose one of the following installation modes: