Installing The Drain Pipe; Indoor Unit Drain Piping - Panasonic S-12MY2U6 Installation Instructions Manual

3-4. Installing the Drain Pipe

Hose clip (Accessory)
Heat insulator (Local supply) (The thickness must be at least 5/16" (8 mm).)
It may be required to take off this part for checking or servicing the drain up motor. Please do not glue.
Make sure that there is no clearance here.
NOT E
Make sure the drain pipe has a downward slant (1/100 or more)
and that there are no water traps.

3-5. 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 1-17/64" (32 mm).
Piping material: Polyvinyl chloride pipe VP-25 and pipe fittings.
● Be sure to perform heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with thickness
more than 5/16" (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 2.46 ft. (750 mm).
● When drain set piping, install as shown in the figure below.
Drain port
Indoor unit
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.
Flexible hose with heat insulator (Accessory)
Unit: ft. (mm)
Down-slope (1/50 ~ 1/100)
Elbow
Elbow
Fig. 3-7
PVC pipe (O.D. ø1-17/64" (ø32mm))
(Local supply)
To be glued
Indoor
unit
Pipe clamp
Down-slope
Down-slope
Air Trap
Indoor
unit
Down-slope (1/50 ~ 1/100)
Feed water
Drain up motor
8
Upward routing
Trap
Upward-slope
No Air Trap
Apply the head when connecting with the
confluence pipe. (about 4" (100 mm))
Use VP30 or more for confluence
Drain hose
Main drain pipe
Drain
Glue the joint
port
Drain hose connection
Use the clip (accessory)
Fig. 3-4
Fig. 3-5
Fig. 3-6
Fig. 3-8
Fig. 3-9