22
5.2
Storing
Copper
Piping
5.2.1
Pipe
delivery,
storage
and
sealing
5.3
Manipulating
Copper
Piping
5.3.1
De
‐
oiling
5.3.2
Cutting
copper
piping
and
removing
burrs
Ensure
that
piping
does
not
get
bent
or
deformed
during
delivery
or
whilst
stored.
On
construction
sites
store
piping
in
a
designated
location.
To
prevent
dust
or
moisture
entering,
piping
should
be
kept
sealed
whilst
in
storage
and
until
it
is
about
to
be
connected.
If
piping
is
to
be
used
soon,
seal
the
openings
with
plugs
or
adhesive
tape.
If
piping
is
to
be
stored
for
a
long
time,
charge
the
piping
with
nitrogen
at
0.2
‐
0.5MPa
and
seal
the
openings
by
brazing.
Storing
piping
directly
on
the
ground
risks
dust
or
water
ingress.
Wooden
supports
can
be
used
to
raise
piping
off
the
ground.
During
installation,
ensure
that
piping
to
be
inserted
through
a
hole
in
a
wall
is
sealed
to
ensure
dust
and/or
fragments
of
wall
do
not
enter.
Be
sure
to
seal
piping
being
installed
outdoors
(especially
if
being
installed
vertically)
to
prevent
rain
entering.
Notes
for
installers
Lubrication
oil
used
during
some
copper
pipe
manufacturing
processes
can
cause
deposits
to
form
in
R410A
refrigerant
systems,
causing
system
errors.
Oil
‐
free
copper
piping
should
therefore
be
selected.
If
ordinary
(oily)
copper
piping
is
used,
it
must
be
cleaned
with
gauze
dipped
in
tetrachloroethylene
solution
prior
to
installation.
Caution
Never
use
carbon
tetrachloride
(CCl
4
)
for
pipe
cleansing
or
flushing,
as
doing
so
will
seriously
damage
the
system.
Notes
for
installers
Use
a
pipe
cutter
rather
than
a
saw
or
cutting
machine
to
cut
piping.
Rotate
the
piping
evenly
and
slowly,
applying
even
force
to
ensure
that
the
piping
does
not
become
deformed
during
cutting.
Using
a
saw
or
cutting
machine
to
cut
piping
runs
the
risk
of
copper
shavings
entering
the
piping.
Copper
shavings
are
difficult
to
remove
and
pose
a
serious
risk
to
the
system
if
they
enter
the
compressor
or
block
the
throttling
unit.
After
cutting
using
a
pipe
cutter,
use
a
reamer/scraper
to
remove
any
burrs
that
have
formed
at
the
opening,
keeping
the
opening
of
the
piping
downwards
to
avoid
copper
shavings
from
entering
the
piping.
Remove
burrs
carefully
to
avoid
scratches,
which
may
prevent
a
proper
seal
being
formed
and
lead
to
refrigerant
leakage.
Notes
for
installers
