Panasonic R410A Specifications, Checking the Drainage, Be careful since the fan will start, Fig

CAUTION

Do not install an air bleeder tube as this may cause water to spray from the drain pipe outlet. (Fig. 1-76)

If it is necessary to increase the height of the drain pipe, the section directly after the connection port can be raised a maximum of 19-11/16".

Do not raise it any higher than 19-11/16", as this could result in water leaks. (Fig. 1-77)

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. 1-78)

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

1 to the unit. Fasten the pipe to a wall, frame, or other support as close to the unit as possible. (Fig. 1-79)

Refer to “ SUPPLEMENT ON DRAIN PIPING”.

6-25. Checking the Drainage

After wiring and drain piping are completed, use the following procedure to check that the water will drain smoothly. For this, prepare a bucket and wiping cloth to catch and wipe up spilled water.

(1)Connect power to the power terminal board (L1, L2 terminal) inside the electrical component box.

(2)Remove the tube cover and through the opening, slowly pour about 0.3 gal. of water into the drain pan to check drainage.

(3)Short the check pin (CN5 white) on the indoor control board and operate the drain pump. Check the water

CAUTION	Be careful since the fan will start
	when you short the pin on the
	indoor control board.

(4)When the check of drainage is complete, open the check pin (CN5 white) and remount the insulator and drain cap onto the drain inspection port.

CAUTION	To mount the tube cover, use 5/16"
	(4 × 8 mm) tapping screws.
	Do not use long screws as they
	may puncture the drain pan and

1. Specifications

Air bleeder

Not good

Fig. 1-76

11-13/16" or less

19-11/16" or less

Good

Fig. 1-77

Upward gradient

No good

Fig. 1-78

Support pieces

Good

Fig. 1-79

1-96