Ariston SGA OPTIMA V X 160 Instructions Pour L'installation Et L'entretien page 32

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WARNING!
Install the appliance to a solid wall, not
subject to vibrations.
When drilling the wall, take care not to
damage any existing electrical wiring or
pipes.
Make sure the installation site and any
systems to which the appliance must
be connected comply with applicable
regulations.
POSITIONING
To allow easy access for maintenance,
make sure to install the unit with suffi -
cient clearance around it.
Position the appliance according to es-
tablished technical rules, using a spirit
level.
The appliance mounts to the wall with
heavy duty hooks (rated to bear the
weight of the appliance when fully
charged with water) installed to the wall.
The clearances are given in the overall
dimensions table.
Place of installation
The choice of installation location must
observe applicable regulations.
The appliance must be installed perfect-
ly vertical. The appliance may not be in-
stalled in the vicinity of a source of heat.
Do not install the appliance in a place
where the temperature may fall below
0°C.
32
WATER CONNECTION
• Connect the heater to the water distri-
bution system using a 3/4" pipe. The
cold water inlet is on the right (blue
ring) while the hot water outlet is at the
left (red ring) as seen from in front of
the heater.
• The heater must be fi tted with a water
safety valve - non-return valve (sup-
plied with the heater) fi tted to the inlet
pipe (blue ring). You must not tamper
with the valve for any reason.
• Make sure by running the water for
some time, that there is no foreign ma-
terial in the water supply line, such as
swarf, sand, pipe dope etc.
Should any such material enter the
water safety valve - non return valve,
there can be faulty valve operation
and in some case faults to the valve
itself.
• Make sure that the water supply pres-
sure is lower than 5 bar (0.5 MPa). If
the pressure is higher, you must fi t a
high quality pressure reducer valve.
In this case the safety valve will nec-
essarily drip during heating. Said drip-
page must appear even if upstream of
the valve there is a non-return valve.
IMPORTANT!
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.