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4.
installing
the refrigerant
piping
,FA,,
(inch)
,_
/_x
45_+2o
@'
Fig. 4-1
4.1. Precautions
4.1.1.
For
devices
that
use
R410A
refrigerant
• Use ester
oil, ether
oil, alkylbenzene
oil (small
amount)
as the refrigeration
oil applied
to the flared
sections.
• Use C1220
copper
phosphorus,
for copper
and
copper
alloy
seamless
pipes,
to connect
the refrigerant
pipes.
Use refrigerant
pipes
with
the
thicknesses
specified
in the table
to the below.
Make
sure
the insides
of
the pipes
are clean
and
do not contain
any
harmful
contaminants
such
as
sulfuric
compounds,
oxidants,
debris,
or dust.
Z_ Warning:
When
installing
or moving
the air conditioner,
use only
the specified
refrigerant
(R410A)
to charge
the refrigerant
lines.
Do not mix it with
any
other
refrigerant
and do
not allow
air to remain
in the lines.
Air enclosed
in
the lines
can cause
pressure
peaks
resulting
in a rupture
and
other
hazards.
A12, A18
Liquid
pipe
e6.35
mm,
1/4 inch
thickness
0.8 mm,
1/32
inch
Gas pipe
e12.7
mm,
1/2 inch
thickness
1.0 mm,
3/64
inch
• Do not use pipes
thinner
than
those
specified
above.
4.2. Connecting pipes (Fig. 4-1)
• When
commercially
available
copper
pipes are used,
wrap liquid
and gas pipes
with commercially
available
insulation
materials
(heat-resistant
to 100 °C, 212 °F
or more,
thickness
of 12 mm, 1/2 inch or more).
• The indoor
parts of the drain pipe should
be wrapped
with polyethylene
foam
insulation
materials
(specific
gravity
of 0.03, thickness
of 9 mm, 23/64 inch or more).
• Apply
thin layer of refrigerant
oil to pipe and joint seating
surface
before
tightening
flare
nut.
• Use two wrenches
to tighten
piping
connections.
• Use refrigerant
piping
insulation
provided
to insulate
indoor
unit connections.
Insulate
carefully.
{_) Flare
cutting
dimensions
Copper
pipe
O.D.
(mm,
inch)
_6.35,
1/4"
e12.7,
112"
:iB}' Flare
nut tightening
torque
Copper
pipe O.D.
(mm,
inch)
_6.35,
1/4"
e12.7,
112"
Flare
dimensions
eA dimensions
(mm,
inch)
8.7-9.1,
11/32-23/64
16.2-16.6,
41/64-21/32
Flare
nut O.D.
(mm, inch)
22, 7/8
29, 1-9/64
Tighteningtorque
(N.m, fl.lbs)
14-18,10-13
49-61,
35-44
i_C_' Apply refrigerating machine oil over the entire flare seat surface.
ii_}' Use correct flare
nuts meeting
the pipe size of the outdoor
unit.
4.3. Positioning
refrigerant
and drain piping (Fig. 4-2)
= PKA-A'HA(L)
Gas pipe
* Indicates tile condition with accessories mounted.
(B Liquid pipe
(
Drain hose
b Left-side piping knockout hole
(E Right-side piping knockout hole
(F Lower piping knockout hole
(_ Mount board (
m PKA-A.HA(L)
L_
Lo
@
1-11/16
35-23/64
2 (@)
1-11/16
(inch)
£
O4
2-13/64
Fig. 4-3
Fig. 4-2
2-23/64
5-5/16
4.4. Refrigerant
piping (Fig. 4-3)
Indoor
unit
1. Remove
the flare
nut and cap of the indoor
unit.
2. Make
a flare for the liquid
pipe and gas pipe and apply
refrigerating
machine
oil
(available
from
your
local supplier)
to the flare
sheet
surface.
3. Quickly
connect
the on site cooling
pipes to the unit.
4. Wrap the pipe cover
that is attached
to the gas pipe and make sure
that the
connection
join is not visible.
5. Wrap the pipe cover
of the unit's
liquid
pipe and make
sure
that it covers
the
insulation
material
of the on site liquid
pipe.
6. The portion
where
the insulation
material
is joined
is sealed
by taping.
Site-side refrigerant piping
Unit side refrigerant piping
6
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