Draining the Water, Flaring size B Unit mm

10-4-2. 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 efficiently.

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-proofing by installing the water-proof rubber caps Š in the 2 elongated holes on the base plate of the outdoor unit. [How to install the water-proof rubber caps]

1)Place four fingers 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 circumfer- ences lift up or the caps catch on or wedge against something.)

10 Water-proof rubber caps (supplied with the outdoor unit)

10-4-3. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

90˚

Obliquity Roughness

Warp

Fig. 10-4-4

2. Insert a flare nut into the pipe, and flare the pipe.

• Projection margin in flaring : A (Unit : mm)

Rigid (Clutch type)

Outer dia. of	R410A	Conventional
copper pipe	tool used	tool used

6.35	0 to 0.5	1.0 to 1.5

9.52	0 to 0.5	1.0 to 1.5

12.7	0 to 0.5	1.0 to 1.5

Base plate

9 Drain nipple

Imperial (Wing nut type)

	Outer dia. of	R410A
	copper pipe	R410A
	copper pipe

6.351.5 to 2.0

9.521.5 to 2.0

12.72.0 to 2.5

DiePipe

Fig. 10-4-5

Fig. 10-4-2

• Flaring size : B (Unit : mm)

2.Install the drain nipple ‰ and a commercially available drain hose (with 16 mm inside diam- eter), 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

9 Drain nipple

Commercially available

drain hose

Do not use ordinary garden hose, but one can flatten and prevent water from draining.

Fig. 10-4-3

Fig. 10-4-6

Outer dia. of copper pipe		B –0.4+0

	R410A		R22
	R410A		R22

6.35	9.1		9.0

9.52	13.2		13.0

12.7	16.6		16.2

•In case of flaring for R410A with the conventional flare tool, pull it out approx. 0.5 mm more than that of R22 to adjust to the specified flare size.

The copper pipe gauge is useful for adjusting projection margin size.

– 56 –

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