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Test water drain while checking the operation sound
of the drain pump motor.
(If the operation sound changes from continuous
sound to intermittent sound, water is normally
drained.)
After the check, the drain pump motor runs,
connecting the fl oat switch connector.
(In case of check by pulling out the fl oat switch
connector, be sure to return the connector to the
original position.)
Single phase
220-240V
Power
terminals
1
2
CN34
(RED)
Red
Black
Pull out connector CN34 (Red)
from P.C. board.
Black
Heat insulating
As shown in the fi gure, cover the fl exible hose and
hose band with the attached heat insulator up to the
bottom of the indoor unit without gap.
Cover the drain pipe seamlessly with a heat insulator
locally procured so that it overlaps with the attached
heat insulator of the drain connecting section.
Wrap the attached heat insulator seamlessly
from the surface of the indoor unit.
Heat insulator of the
Heat insulator
drain connecting
(Locally procured)
section (Accessory)
* Direct the slits and seams of the heat insulator
upward to avoid water leakage.
23-EN
White
6
Refrigerant piping
CAUTION
When the refrigerant pipe is long, provide support
brackets at intervals of 2.5 m to 3 m to clamp the
refrigerant pipe. Otherwise, abnormal sound may
be generated.
Permissible piping length
and height difference
They vary depending on the outdoor unit. For details,
refer to the Installation Manual attached to the
outdoor unit.
CAUTION
IMPORTANT 4 POINTS FOR PIPING WORK
1. Reusable mechanical connectors and flared
joints are not allowed indoors. When mechanical
connectors are reused indoors, sealing parts shall
be renewed. When flared joints are reused indoors,
the flare part shall be refabricated.
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes using
VACUUM PUMP.
4. Check the gas leakage. (Connected points)
Pipe size
Pipe size (mm)
Gas side
Liquid side
Ø9.5
Connecting refrigerant piping
Flaring
Cut the pipe with a pipe cutter.
Remove burrs completely.
Remaining burrs may cause gas leakage.
Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R32 differ from those of
refrigerant R22, the flare tools newly manufactured
for R32 are recommended.
However, the conventional tools can be used by
adjusting projection margin of the copper pipe.
– 12 –
Projection margin in flaring: B (Unit: mm)
Outer dia. of
Tool used
copper pipe
6.4, 9.5
0 to 0.5
Flaring diameter size: A (Unit: mm)
Outer dia. of copper pipe
6.4
9.5
CAUTION
Do not scratch the inner surface of the flared part
when removing burrs.
Ø6.4
Flare processing under the condition of scratches
on the inner surface of flare processing part will
cause refrigerant gas leak.
Check that the flared part is not scratched,
deformed, stepped, or flattened, and that there
are no chips adhered or other problems, after
flare processing.
Do not apply refrigerating machine oil to the flare
surface.
Conventional
tool used
1.0 to 1.5
A
+0
–0.4
9.1
13.2
EN
24-EN
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