• Holes are provided on the base plate of the outdoor
unit to ensure that the defrost water produced during
heating operations is drained off eff 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-proof 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 f 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
Drain nipple
Commercially available
drain hose
Do not use ordinary garden hose, but one can flatten
and prevent water from draining.
Draining the Water
10-4-3. Refrigerant piping connection
<Flaring>
1.
Cut the pipe with a pipe cutter.
Fig. 10-4-4
2. Insert a flare nut into the pipe, and flare the pipe.
•
Projection margin in flaring : A (Unit : mm)
Fig. 10-4-5
90°
Roughness
Obliquity
A
Die
Pipe
Warp
RIDGID (clutch type)
IMPERIAL (wing nut type)
Outer dia. of copper pipe Tool used
Ø6.35 1.5 to 2.0
Ø9.52 1.5 to 2.0
Ø12.70 2.0 to 2.5
Pipes thickness 0.8 mm or more
Outer dia.
of copper pipe
Tool used
Conventional tool
used
Ø6.35 0 to 0.5 1.0 to 1.5
Ø9.52 0 to 0.5 1.0 to 1.5
Ø12.70 0 to 0.5 1.0 to 1.5
Pipes thickness 0.8 mm or more
• Do not scratch the inner surface of the flared part when
removing burrs.
• Flare processing under the condition of scratches on the
inner surface
of flare processing part will cause refrigerant gas leak.
CAUTION
Water-proof rubber caps
(supplied with the outdoor unit)
Base plate
Drain nipple
Fig. 10-4-3
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