Ariston C00520 Mode D'emploi page 19

EN
pipes.
Local regulations may provide for restrictions on installation in bathrooms; observe any regulatory minimum distances.
The range of water heaters includes models set up to be assembled above or below the point of use (sink, basin or
shower). The models intended to be assembled under the point of use are called "undersink".
To facilitate maintenance, make sure there is a clearance of at least 50 cm inside the enclosure for access to the
electrical equipment. Fix the supplied bracket to the wall with screws and dowels of adequate size for the type of wall.
Hook the water heater to the bracket and pull down to make sure it is secured.
HYDRAULIC CONNECTION
Hook up the water heater inlet and outlet with pipes or fittings that are resistant to the operating pressure and hot
water temperature, which may reach and even exceed 80°C in normal operation. Do not employ materials not rated
for such temperatures.
Screw a T-fitting to the appliance's intake (blue collar). To this fitting, screw a drain cock (B fig. 1) of a type that can
only be operated with a tool) on side and on the other, the overpressure device (A fig. 1).
CAUTION For countries which have enacted European standard EN 1487, the overpressure device supplied
with the appliance (if present) is non-conforming. The regulatory device must be calibrated to a maximum
pressure of 0.7 MPa (7 bar) and include at least a cock, check valve and control, safety valve and hydraulic
load cutout.
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 appliance's drain outlet must be connected to a drain pipe of diameter at least equal to the of the outlet itself,
with a funnel to permit an airgap of at least 20 mm for visual inspection to prevent damage or injury to persons, animals
and property when the device operates; the manufacturer is not liable for any such consequences. Use a hose to
connect the overpressure device to the mains cold water supply; fit a cock if necessary (D fig. 1). Fit a drain pipe to
(C fig. 1) to handle circumstances in which the drain cock is opened.
When installing the overpressure safety device, do not tighten it fully down, and do not tamper with its settings. It is
normal that water drip from the overpressure safety device when the appliance is heating. For this reason one must
install a drain, open to the air, with a continuously downwards sloping pipe, in an area not subject to subzero
temperatures. If the mains pressure is close to the valve's setting, fit a pressure reducer as far away from the appliance
as possible. If you decide to install mixer units (taps or shower), purge the pipes of any potentially damaging impurities
first.
The appliance must not be supplied with water of hardness less than 12°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
hardness 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 impurities.
"Gravity drain" connection
Specific taps must be used for this type of installation and the connection must be implemented as shown in the
diagram in Fig. 2. With this solution, the water heater can work at any mains pressure and no type of tap must be
connected on the outlet pipe, which acts as a vent.
Electrical connection
Before working on the appliance, shut off mains power with its external power 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 mains power supply is rated for the heater's maximum power draw (refer to the nameplate) and that
the electrical cables are suitably rated and regulatory. Multi-plugs, extensions and adapters may not be used.
Do not use the plumbing, heating or gas pipes for grounding the appliance.
2
If the appliance has a power cord which requires replacement, use a cable of equivalent type (H05VV-F 3x1 mm ,
2
dia. 8.5 mm). The power cord (HO5 V V-F 3x1 mm dia. 8.5 mm) must be routed into the hole (F fig. 3) in the back of
the appliance and connected to the thermostat terminals (M fig. 6). Use a two-pole switch conforming with CEI-EN
(contact gap of at least 3 mm, preferably equipped with fuses) to disconnect the appliance's power supply.
The appliance must be grounded with a cable (yellow/green and longer than the phase cable) connected to the
terminals marked (G fig. 6).
Before starting up the appliance, check that the power rating matches that given on the nameplate. If the appliance
has no power cord, it can be installed in one of the following ways:
- connection to mains with a rigid pipe (if the appliance has no cable clamp);
2
- with a flexible cable (H05VV-F 3x1mm , dia. 8.5 mm) if the appliance has a cable clamp.
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