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CAUTION
1. Install the outdoor unit without anything blocking the air discharging.
2. When the outdoor unit is installed in a place always exposed to strong
wind like a coast or on a high storey of a building, secure the normal fan
operation using a duct or a windshield.
3. In particularly windy areas, install the unit such as to avoid admission of
wind.
4. Installation in the following places may result in trouble.
Do not install the unit in such places.
• A place full of machine oil
• A saline-place such as the coast
• A place full of sulfi de gas
• A place where high-frequency
waves are likely to be generated
as from audio equipment, welders,
and medical equipment
Draining the Water
• Holes are provided on the base plate of the outdoor unit to ensure that the
defrost water produced during heating operations is drained off effi ciently.
If a centralized drain is required when installing the unit on a balcony or
wall, follow the steps below to drain off the water.
1. Proceed with water-proofi ng by installing the water-proof rubber caps
in the 2 elongated holes on the base plate of the outdoor unit. [How to
install the water-proof rubber caps]
1) Place four fi ngers into each cap, and insert the caps into the water
drain holes by pushing them into place from the underside of the base
plate.
2) Press down on the outer circumferences of the caps to ensure that
they have been inserted tightly. (Water leaks may result if the caps
have not been inserted properly, if their outer circumferences lift up or
the caps catch on or wedge against something.)
2. Install the drain nipple and a commercially available drain hose
(with 16 mm inside diameter), and drain off the water.
(For the position where the drain nipple is installed, refer to the
installation diagram of the indoor and outdoor units.)
• Check that the outdoor unit is horizontal, and route the drain hose at
a downward sloped angle while ensuring that it is connected tautly.
Base plate
Do not use ordinary garden hose, but one can fl atten and prevent water
from draining.
Strong
wind
Water-proof rubber caps
(supplied with the outdoor unit)
Base plate
Drain nipple
Drain nipple
Commercially available
drain hose
Refrigerant Piping Connection
Flaring
1. Cut the pipe with a pipe cutter.
90°
2. Insert a fl are nut into the pipe and fl are the pipe.
• Projection margin in fl aring : A (Unit : mm)
RIDGID (clutch type)
Outer dia.
of copper pipe
Ø6.35
Ø9.52
Ø12.70
Pipes thickness
IMPERIAL (wing nut type)
A
Die
Pipe
CAUTION
• Do not scratch the inner surface of the fared part when removing
burrs.
• Flare processing under the condition of scratches on the inner surface
of fl are processing part will cause refrigerant gas leak.
Tightening connection
Align the centers of the connecting pipes and tighten the fl are nut as far as
possible with your fi ngers. Then tighten the nut with a spanner and torque
wrench as shown in the fi gure.
Half union
Externally
threaded side
Use a wrench to secure.
CAUTION
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
Outer dia. of copper pipe
Ø6.35 mm
Ø9.52 mm
Ø12.70 mm
• Tightening torque of fl are pipe connections
The operating pressure of R32 or R410A
is higher than that of R22 (approx.
1.6 times). It is therefore necessary to
fi rmly tighten the fl are pipe connecting
sections (which connect the indoor
and outdoor units) up to the specifi ed
tightening torque. Incorrect connections
may cause not only a gas leakage, but
also damage to the refrigeration cycle.
11
Obliquity
Roughness
Conventional tool
Tool used
0 to 0.5
0 to 0.5
0 to 0.5
0.8 mm or more
Outer dia. of copper pipe
Ø6.35
Ø9.52
Ø12.70
Pipes thickness
Flare nut
Internally
threaded side
Use a torque wrench to tighten.
Tightening torque
16 to 18 (1.6 to 1.8 kgf·m)
30 to 42 (3.0 to 4.2 kgf·m)
50 to 62 (5.0 to 6.2 kgf·m)
Warp
used
1.0 to 1.5
1.0 to 1.5
1.0 to 1.5
Tool used
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
0.8 mm or more
(Unit : N·m)
Flare at
indoor unit side
Flare at
outdoor unit side
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