6
■
English
2.
Drain work (only for heat pump
models, excluding RXL models)
CAUTION
In cold areas, do not use a drain socket, drain caps (1,2)
and a drain hose with the outdoor unit. (Drain water may
freeze, impairing heating performance.)
• If the drain port is covered by a mounting base or floor
surface, place additional foot bases of at least 1-1/4
inch (30mm) in height under the outdoor unit’s feet.
1) Attach
C
drain cap (1) and
D
drain cap (2).
2) Attach
B
drain socket.
•
When attaching
B
drain socket to the bottom
frame, make sure to connect the drain hose to the
drain socket first.
3.
Flaring the pipe end
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing
downward, so that the filings do not enter the
pipe.
3)
Put the flare nut on the pipe.
4) Flare the pipe.
5)
Check that the flaring has been done correctly.
Check
The flare's
inner surface
must be
flaw-free.
The pipe end must
be evenly flared in
a perfect circle.
Make sure that the
flare nut is fitted.
Set exactly at the position shown below.
Flaring
A
Die
A
0-0.020 inch
(0-0.5mm)
Clutch-type
Flare tool for R410A
0.039-0.059 inch
(1.0-1.5mm)
Clutch-type (Rigid-type)
0.059-0.079 inch
(1.5-2.0mm)
Wing-nut type (Imperial-type)
Conventional flare tool
Cut exactly at
right angles.
Remove burrs.
WARNING
• Do not apply mineral oil to the flare.
•
Prevent mineral oil from getting into the system as this would reduce the service life of the units.
•
Never use piping which has been used for previous installations. Only use parts which are delivered with this unit.
•
Never install a dryer to this R410A unit in order to guarantee its service life.
•
The drying material may dissolve and damage the system.
• Incomplete flaring may result in refrigerant gas leakage.
4.
Refrigerant piping
CAUTION
• Use the flare nut fixed to the main unit. (This is to prevent the flare nut from cracking as a result of deterioration over time.)
• To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
• Use a torque wrench when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
• Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand, then tighten them fully with a spanner and a
torque wrench.
Do not apply refrigeration
oil to the outer surface.
Flare nut
Apply refrigeration
oil to the inner
surface of the flare.
Do not apply refrigeration oil to
the flare nut to avoid tightening
with excessive torque.
Apply oil
Flare nut tightening torque
Gas side
3/8 inch (9.5mm)
1/2 inch(12.7mm)
24-1/8 –
29-1/2ft • Ibf
(32.7-39.9N • m)
36-1/2 –
44-1/2ft • lbf
(49.5-60.3N • m)
5/8 inch(15.9mm)
45-5/8 –
55-5/8ft • lbf
(61.8-75.4N • m)
10-1/2 – 12-3/4ft
• lbf
(14.2-17.2 N
•
m)
Liquid side
1/4 inch (6.4mm)
Service port cap tightening torque
8 –
10-7/8ft • lbf (10.8-14.7N • m)
Width across flats
11/16 inch(17mm)
(14.2-17.2N • m)
10-1/2 –
12-5/8ft • lbf
3/4 inch(19mm)
(17.1-20.9N • m)
12-5/8 –
15-3/8ft • lbf
7/8 inch(22mm)
(21.6-27.4N • m)
16 –
20-1/4ft • lbf
1-1/16 inch(27mm)
(48-59.8N • m)
35-3/8 –
44-1/8ft • lbf
Valve cap
tightening torque
Bottom frame
Drain cap
Pinch the bottom
frame in.
Drain cap (1)
Drain cap (1)
Air outlet side
C
C
Drain cap (2)
D
Drain
socket
B
Drain cap (1)
Drain cap (2)
D
Drain cap (2)
Air outlet side
B
Drain
socket
C
D
09/12 class
15/18/24 class
Bottom frame
Drain socket
Hose (available commercially,
inner dia. 5/8 ” (16mm))
B
English
01_EN_3P379970-10C.indd 6
10/18/2019 9:18:00 AM
