i
‐
SHWAK
V4
Inverter
air/water
chillers
and
heat
pumps
with
floor
‐
standing
and
remote
condensing
units
Note:
All
the
pictures
in
this
manual
are
for
explanation
purpose
only.
They
may
be
slightly
different
from
the
unit
you
purchased.
The
actual
shape
shall
prevail.
24
8.6
REFRIGERANT
CONNECTIONS
The
refrigerant
connections
are
equipped
with
shut
off
valves
on
the
outdoor
unit
and
designed
for
flare
connections.
How
to
make
the
connection:
Place
the
refrigerant
pipes;
(place
the
refrigerant
pipes,
the
number
of
curves
should
be
as
low
as
possible
and
avoid
throttling
of
the
pipes)
Bring
together
the
flared
ends
to
their
connection
located
on
the
indoor
and
outdoor
units;
Tighten
the
connections
by
using
the
method
of
”key
against
key”;
Perform
a
proper
evacuation
of
the
refrigerant
pipes
using
the
taps
of
the
moto
‐
condensing
unit
(similarly
to
household
split).
Check
if
the
work
was
being
done
well
by
evaluating
the
rise
time
by
mean
of
pressure
gauge
that
integrated
in
the
vacuum
pump.
Release
the
refrigerant
contained
in
the
moto
‐
condensing
unit
by
opening
the
gas/liquid
valves
(see
Paragraph
8.4.2.2).
Add
or
take
out
a
proper
amount
of
refrigerant
as
indicated
in
the
below
table.
Check
if
there
is
no
refrigerant
leakage.
Cover
the
connections
with
insulating
material
(thickness
not
less
than
13mm)
suitable
for
a
maximum
temperature
of
120
°
C.
Since
the
system
is
composed
of
indoor
and
outdoor
units,
therefore,
only
a
qualified
personal
complies
with
the
PED
Directive
and
the
related
national
regulations
for
its
implementation
who
can
carry
out
the
connection
between
both
units
should.
To
avoid
the
formation
of
humidity
and
particle
contamination
in
the
event
that
the
installation
of
the
pipes
does
not
terminated
within
two
days
from
the
beginning,
it
is
advisable
to
braze
the
ends
of
the
pipes
and
introduce
anhydrous
nitrogen
through
a
Schrader
valve
access
fitting.
