Indoor Unit Drain Piping - Panasonic CS-E10HB4EA Service Manual

11.3.4. INDOOR UNIT DRAIN PIPING

• During drain piping connection, be careful not to exert extra force on the drain port at the indoor unit.
• The outside diameter of the drain connection at the indoor unit is 32mm.
Piping material: Polyvinyl chloride pipe VP-25 and pipe fittings.
• Be sure to perform heat insulation on the drain piping.
Heat insulation material: Polyvinylene foam with thickness more than 8 mm (local supply).
• Drain piping must have down-slope (1/50 to 1/100); be sure not to provide up-and-down slope to prevent reversal flow.
• Be sure to check no air trap on drain hose and to ensure smooth water flow and no abnormal sound.
• The height of drain may be possible up to 750 mm.
Drain Test The air conditioner uses a drain up motor to drain water. Use the following procedure to test the drain up motor operation.
• Connect the main drain pipe to exterior and leave it provisionally until the test comes to an end.
• Feed water to the flexible drain hose and check the piping for leakage.
• Be sure to check the drain up motor for normal operating and noise when electric wiring is complete.
• When the test is complete, connect the flexible drain hose to the drain port.
• Pour about 600-700cc of water in the drain pan of the indoor unit. (Pour from the position specified in the drawing by using a
water supply bottle or other suitable tool.)
• Press the drain pump test run on pcb to start the drain motor, and verity water drainage.
(The drain motor will automatically stop after operating for about five minutes.)
• When drain set piping, install as shown in the figure below.
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