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Idiomas disponibles
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4.
Installing the refrigerant
piping
4.1. Precautions
4.1.1.
For devices
that
use R410A
refrigerant
. Use ester oil, ether oil, a(kyibenzene
oil (small amount)
as the refrigeration
oil
applied
to the flared sections.
. Use Cl 220 copper
phosphorus,
for copper
and copper
alloy seamless
pipes,
to connect
the refrigerant
pipes. Use refrigerant
pipes with the thicknesses
specified
in the tab(e to the be(ow. Make sure the insides of the pipes are
clean and do not contain
any harmful
contaminants
such as sulfuric
com-
pounds, oxidants, debris, or dust.
®
45o_+2°
®
Fig. 44
@ Flare cutting dimensions
Copper pipe O.D.
Flare dimensions
(mm, inch)
sA dimensions
(mm, inch)
06.35, 1/4"
8.7 - 9.1,11/32-23/64
09.52, 3/8"
12.8- 13.2, 1/2-33/64
o12.7, 1/2"
16.2 - 16.6, 41/64-21/32
el 5.88, 5/8"
19.3 - 19.7, 49/64-25/32
Z_ Warning:
When installing
or moving
the air conditioner,
use only the specified
refriger-
ant (R410A) to charge the refrigerant
lines. Do not mix it with any other refriger-
ant and do not a((ow air to remain in the (ines. Air enclosed
in the (ines can
cause pressure peaks resulting
in a rupture and other
hazards.
I
A12, A18
Liquid pipe
e6.35mm,
1/4 inch thickness 0.8 mm, 1/32 inch
Gas pipe
e12.7mm,
1/2 inch thickness 0.8 mm, 1/32 inch
Do not use pipes thinner
than those
specified
above.
(inch)
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 ram, 1/2 inch or more).
= The indoor parts of the drain pipe should be wrapped with polyethylene
foam insu-
lation materials (specific gravity of 0.03, thickness of 9 ram, 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.
Insu-
late carefully.
(_) Flare nut tightening torque
Copper pipe O.D.
(mm, inch)
06.35,
1/4"
e9.52, 3/8"
o12.7,
1/2"
o15.88, 5/8"
Flare nut O.D.
Tightening
torque
(mm, inch)
(N.m, ft4bs!
17, 43/64
14 - 18, 10-13
22, 7/8
34 - 42, 25-30
26, 1-3/64
49 - 61, 35-44
29, 1-9/64
68 - 82, 49-59
© Apply
refrigerating
machine
oil over the entire flare seat surface.
@ Use correct flare nuts meeting the pipe size of the outdoor unit.
Avaimabmepipe size
Liquid side
Gas side
A12, A18
06.35
o12.7
O : Factory flare nut attachment
to the heat-exchanger.
5
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