REFRIGERANT PIPE INSTALLATION
16
1
.
Maximum
pipe
length
and
height
drop
Considering
the
allowable pipe
length and
height drop to
decide
the
installation
position
.
Make
sure the
distance
and
height
drop
between
indoor
and
outdoor
unit
not exceeded
the
date
in
the
following
table
.
Model
Max
.
Length FT[M]
Max
.
Elevation FT[M]
≤
36
,
000Btu
/
h
50[15]
26[8]
>
36
,
000Btu
/
h
66[20]
33[10]
2
.
The procedure
of
connecting
pipes
2
.
1 Choose
the
pipe
size
according
to
the
specification
table
.
2
.
2 Confirm
the
cross
way of the pipes
.
2
.
3 Measure
the
necessary pipe
length
.
2
.
4 Cut
the
selected
pipe
with
pipe
cutter
Make
the
section
flat and smooth
.
90
Lean
Crude
Burr
o
2
.
5 Insulate
the
copper
pipe
Before
test
operation
,
the
joint
parts
should not be
heat insulated
.
Max elbow(pcs)
5
5
2
.
6 Drill
holes
if
the
pipes
need
to
pass
the
wall
.
2
.
7 According
to
the
field
condition
to
bend
the
pipes
so
that
it
can
pass
the
wall
smoothly
.
2
.
8 Bind
and
wrap
the
wire
together with
the
insulated
pipe
if necessary
.
2
.
9 Set
the wall
conduit
2
.
10 Set the supporter
for the pipe
.
2
.
11 Locate
the
pipe and
fix it by
supporter
For
horizontal refrigerant
pipe
,
the distance
between supporters
should
not be
exceed
1m
.
For
vertical refrigerant
pipe
,
the distance
between supporters
should
not
be exceed
1
.
5m
.
2
.
12 Connect
the
pipe
to
indoor unit and
outdoor
unit by brazing
(
Top
discharge outdoor
unit and
Air
Handler indoor units
)
Top
discharge
outdoor unit
and air
handler
indoor
units connections
are
copper
-to-
copper and should
be
brazed
with
a
phosphorous
-
copper alloy
material
such
as
Silfos
-
5
or
equivalent
.
DO
NOT
use
soft
solder
.
The outdoor
units have
reusable
service
valves
on
both
the
liquid
and vapor connections
.
The
total
system
refrigerant charge
is
retained
within
the outdoor unit
during
shipping
and
installation
.
The
reusable
service
valves
are
provided
to
evacuate
and
charge
per this instruction
.
Serious
service
problems
can
be
avoided
by taking
adequate
precautions
to
assure
an
internally clean
and
dry system
.
CAUTION
:
Dry nitrogen
should
always
be
supplied
through
the
tubing
while
it
is
being
brazed
,
because the
temperature
required
is
high
enough
to
cause
oxidation
of
the
copper
unless
an
inert atmosphere
is
provide
.
The
flow
of
dry nitrogen
should
continue
until
the
joint has cooled
.
Always
use
a
pressure
regulator and
safety valve to insure that
only low pressure
dry
nitrogen
is
introduced
into
the
tubing
.
Only a small
flow is
necessary to
displace
air
and
prevent oxidation
.
