Panasonic CU-4KE24NBU Installing the Drain Piping,
Attach so that the hose band, Drain port

3-4. Installing the Drain Piping

(1)Prepare standard hard PVC pipe (locally purchased O.D. 1-1/32" (26 mm)) for the drain and use the supplied hose band to prevent water leaks. (Fig. 6-5)

(2)To install the drain hose, first place 1 of the 2 hose bands over the unit drain port and the other hose band over the hard PVC pipe (not supplied). Then connect both ends of the supplied drain hose. (Fig. 6-5)

(3)On the unit drain side, grasp the hose band with pliers and insert the drain hose all the way to the base.

If other commercially available hose bands are used, the drain hose may become pinched or wrinkled and there is danger of water leakage. Therefore be sure to use the supplied hose bands. When sliding the hose bands, be careful to avoid scratching the drain hose.

Do not use adhesive when connecting the supplied drain hose to the drain port (either on the main unit or the PVC pipe).

Reasons: a) It may cause water to leak from the connec- tion. Since the connection is slippery just after the adhesive has been applied, the pipe easily slips off.

b)The pipe cannot be removed when mainte- nance is needed.

(4)Wrap the hose with the supplied drain hose insulation and use the 4 twist ties so that the hose is insulated with no gaps.

Do not bend the supplied drain hose 90° or more. The hose may slip off.

NOTE

Make sure the drain pipe has a downward gradient (1/100 or more) and that there are no water traps.

CAUTION

In cases where it is necessary to raise the height of the drain piping, the drain piping can be raised to a maximum height of 2.78 ft. (850 mm) above the bottom surface of the ceiling. Under no conditions attempt to raise it higher than 2.78 ft. (850 mm) above the bottom surface of the ceiling. Doing so will result in water leakage. (Fig. 6-7)

Do not use natural drainage.

Do not install the pipe with an upward gradient from the connection port. This will cause the drain water to flow backward and leak when the unit is not operating.

(Fig. 6-8)

Do not apply force to the piping on the unit side when connecting the drain pipe. The pipe should not be allowed to hang unsupported from its connection to the unit. Fas- ten the pipe to a wall, frame, or other support as close to the unit as possible. (Fig. 6-9)

Provide insulation for any pipes that are run indoors.

Twist tie

(4 vinyl ties, supplied)

Drain port	Drain hose	Hard PVC pipe		Position to
	insulation	(equivalent to
				fasten hose
	(supplied)	O.D. 1-1/32" (26mm))
		(locally purchased)		bands
			Drain hose
			(supplied)
3/16"	3/16"
(5mm)	(5mm)
15/16"	15/16"		Hose band
(25mm)	(25mm)		(2 bands, supplied)
	5-1/2"(140mm)
Unit
	Fig. 6-5

CAUTION	Attach so that the hose band
	fastener is on the side of the
	drain port.

Attach the hose bands so that each is approximately 3/16" (5 mm) to 15/16" (25 mm) from the end of the supplied drain hose.

Air bleeder prohibited

Fig. 6-6

CAUTION
Do not install an air bleeder as this may cause water to spray

from the drain pipe outlet. (Fig. 6-6)

1 ft.(300mm) or less

2.78 ft.(850mm) or less

0 - 45

/HQJWKRIVXSSOLHGGUDLQKRVH mm)

Fig. 6-7

Uphill slope

Fig. 6-8

Support bracket

Fig. 6-9

8