21
Check
the
operating
pressure,
and
superheat
and
subcooling
x
Check
of
the
efficiency
of
circulation
pump.
x
Check
the
expansion
tank.
x
If
the
unit
should
be
out
of
service
for
a
long
period,
discharge
water
from
the
piping
and
from
heat
exchanger.
This
operation
is
necessary
if,
during
seasonal
stoppages,
ambient
temperature
is
expected
to
go
down
below
the
freezing
point
of
the
employed
fluid.
x
11.1
ENVIRONMENTAL
PROTECTION
According
to
the
norms
dealing
with
the
use
of
depleting
stratospheric
ozone
substances,
it
is
forbidden
to
release
refrigerants
fluids
in
the
atmosphere.
They
have
to
be
collected
and
delivered
to
the
seller
or
to
proper
gathering
points
at
the
end
of
their
operating
life.
Refrigerant
R410A
is
mentioned
among
controlled
substances
and
for
this
reason
it
has
to
be
subjected
to
the
mentioned
norms.
A
particular
care
is
recommended
during
service
operations
in
order
to
reduce
as
much
as
possible
any
refrigerant
loss.
12
WHEN
THE
UNIT
GOES
OUT
OF
SERVICE
Once
the
unit
is
arrived
at
the
end
of
its
life
cycle
and
needs
to
be
removed
or
replaced,
the
following
operations
are
recommended.
•
the
refrigerant
has
to
be
recovered
by
trained
people
and
sent
to
proper
collecting
centre;
•
compressors’
lubricating
oil
has
to
be
collected
and
sent
to
proper
collecting
centre;
•
the
frame
and
the
various
components,
if
not
serviceable
any
longer,
have
to
be
dismantled
and
divided
according
to
their
nature,
particularly
copper
and
aluminium,
which
are
present
in
conspicuous
quantity
in
the
unit.
These
operations
allow
easy
material
recover
and
recycling
process,
thus
reducing
the
environmental
impact.
Summary of Contents for PACK DUE 12
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