23
AGUAPLUS
COSMOGAS
8.1 - Water connections
WARNING !!!
If the water hardness is higher
than 20°f (200 ppm), a softener shall have to be
installed on the cold water inlet.
WARNING !!!
If the appliance works at a
temperature higher than 60°C, the water hardness must
be lower than 15°f (150 ppm).
WARNING !!!
The water must not be softened
at values lower than 5°f (50 ppm). At these values it
becomes acid and can corrode parts of the appliance,
thus reducing its life.
WARNING !!! The water acidity must have a pH
value between 6.5 and 8.5. A value outside this range is
corrosive, and it can damage the heat exchanger and/or
the piping.
WARNING !!! Install a filter with mesh no larger
than 0.5 mm2 in the domestic cold water inlet.
WARNING !!!
The domestic hot water circuits
must be made with materials that are resistant to a
temperature of at least 95°C and a pressure of 10
bar. Otherwise (i.e. plastic piping), the system must
be equipped with appropriate protection and safety
devices.
You can check the position of the domestic hot water and
cold water connections in Figure 7-2.
Provide a shut-off valve upstream of the cold water inlet,
which is useful for maintenance work.
8 - INSTALLATION - Plumbing
8.2 - Gas
WARNING !!! Never use a gas different than that
stated on the appliance rating plate.
WARNING !!!
Check that the type and the pressure
of the gas supplied correspond with those required for
the appliance as stated on the rating plate.
There can be
two situations:
If the gas and the supply pressure correspond with the
appliance setting,;
B - the gas and the supply pressure do not correspond with
the appliance setting. In this case you need to convert
the appliance for the type of gas and supply pressure
corresponding to the supply ones available.
The appliance is equipped with the specific gas conversion
kit.
Before installation, it is advisable to thoroughly clean the
inside of the gas adduction pipe.
It is mandatory to always install a gas shut-off valve near
the appliance on the gas adduction pipe.
WARNING !!! Before supplying gas to the
appliance, do a leak test on the gas system, as required
by the technical regulations in force.
To prevent damaging the appliance gas control unit, run
a seal test at a pressure no greater than 50 mbar.
If the gas system test must be run at pressures
exceeding 50 mbar, use the valve located immediately
upstream of the appliance to cut it off from the rest of the
system.
In Figure 7-2 you can check the appliance gas fitting
positioning. The sections of piping that make up the gas
adduction system must always ensure sufficient gas supply
to cover the maximum required.
