24-EN
23-EN
– 12 –
y
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.)
S(N)
R(L)
CN34
(RED)
Black
Pull out connector CN34 (Red)
from P.C. board.
Black
Single phase
208-240V
Power
terminals
White
Red
Heat insulating
y
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.
y
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
drain connecting
section (Accessory)
Heat insulator
(Locally procured)
Indoor unit
* Direct the slits and seams of the heat insulator
upward to avoid water leakage.
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.
Use the
fl
are nut attached with the indoor unit or
R410A
fl
are nut.
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.
Pipe size
Pipe size (mm)
Gas side
Liquid side
Ø9.5
Ø6.4
Connecting refrigerant
piping
Flaring
1. Cut the pipe with a pipe cutter.
Remove burrs completely. (Remaining burrs may
cause gas leakage.)
2. Insert a
fl
are nut into the pipe, and
fl
are the pipe.
Use
the
fl
are nut provided with the unit or the
one used for the R410A refrigerant. The
fl
aring
dimensions for R410A are different from the ones
used for the conventional R22 refrigerant. A new
fl
are tool manufactured for use with the R410A
refrigerant is recommended, but the conventional
tool can still be used if the projection margin of
the copper pipe is adjusted to be as shown in the
following table.
Projection margin in
fl
aring: B (Unit: mm)
Outer dia. of
copper pipe
R410A tool used
Conventional
tool used
6.4, 9.5
0 to 0.5
1.0 to 1.5
Flaring diameter size: A (Unit: mm)
Outer dia. of copper pipe
A
+0
–0.4
6.4
9.1
9.5
13.2
* In case of
fl
aring for R410A with the conventional
fl
are tool, pull it out approx. 0.5 mm more than that
for R22 to adjust to the speci
fi
ed
fl
are size. The
copper pipe gauge is useful for adjusting projection
margin size.
y
The sealed gas was sealed at the atmospheric
pressure so when the
fl
are nut is removed, there
will no “whooshing” sound: This is normal and is not
indicative of trouble.
y
Use two wrenches to connect the indoor unit pipe.
Work using double spanner
