24
Models m.u.
5 7 9 12 15
Hydraulic connections
Boiler ow “ GAS 1 1 1 1 1
Boiler return “ GAS 1 1 1 1 1
Domestic hot water “ GAS 3/4 3/4 3/4 3/4 3/4
Hot water feed “ GAS 3/4 3/4 3/4 3/4 3/4
High temperature utilities ow “ GAS 3/4 3/4 3/4 3/4 3/4
High temperature utilities return “ GAS 3/4 3/4 3/4 3/4 3/4
Solar ow mm 12 12 12 12 12
Solar return mm 12 12 12 12 12
Plant return “ GAS 1 1 1 1 1
Plant delivery “ GAS 1 1 1 1 1
Some of the connections shown are only present if the
respective accessories have been installed. For detailed
-
uration accessories" p.55 section.
For dimensional information, refer to chapter
"Technical information" p.64.
If cosmetic panels are mounted:
– remove as indicated in the chapter "Removal of aes-
thetic panels" p.18
3�12�5 Connection to the system
Preliminary warnings
To allow maintenance or repair operations, each hy-
draulic connection must be equipped with the respec-
It is advisable to create a by-pass in the plant to be able
to wash the plate exchanger without having to discon-
nect the appliance.
Before connecting the piping, make sure that it do not
contain stones, sand, rust or foreign matter that could
damage the plant.
The minimum nominal diameter of the connect-
ing pipes must be as indicated in the table. Keep
inmindthatundersizedpipelinesleadtopoorsys-
tem operation and/or a loss of thermal and cool-
ing performance.
The connection piping must be suitably supported so
as not to bear on the appliance with its weight.
require the use of hydraulic disconnectors.
Flush the plant thoroughly before connecting the
unit. This cleaning process removes any residue, such
as welding drops, slag, rust or other fouling from the
pipes. These substances may otherwise settle inside
and cause the appliance to malfunction.
Hydraulic lines and joints must be thermally insulated.
Insulate the water distribution piping with polyethylene
foam or similar materials with a minimum thickness
must also be adequately insulated.
Avoid partial insulation of the pipes.
Avoid over-tightening the pipes to avoid damage to the
insulation.
Carefully check that the insulation is tight, in order to
prevent the making and dripping of condensate.
inlet of the appliance in an area accessible for mainte-
nance is compulsory to safeguard the appliance from
impurities in the water.
clean is forbidden.
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