Panasonic S-36MK2E5A - Indoor Unit Drain Piping; Drain Test

2-22
Design of VRF SYSTEM
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3. How to install the 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.
3-2-5. Indoor Unit Drain Piping
During drain piping connection, be careful not to exert extra
force on the drain port at the indoor unit.
Be sure to perform heat insulation on the drain piping.
Heat insulation material: Polyethylene foam with thickness
more than 8 mm (local supply).
Drain piping must have Downward Slant (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.
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.
When drain set piping, install as shown in the figure below.
The outside diameter of the drain connection at the indoor
unit is 32 mm.
Piping material: Polyvinyl chloride pipe VP-25 and pipe fittings.
Upward routing
Downward Slant Upward Slant
Indoor
unit
Pipe clamp
Downward Slant
Trap
Fig. 2-34
No Air TrapAir Trap
Fig. 2-35
Drain port
Indoor unit
750 mm or less
Downward Slant (1/50 ~ 1/100)
Elbow
Elbow
Fig. 2-36
Use VP30 or more for confluence
Indoor
unit
Downward Slant (1/50 ~ 1/100)
Apply the head when connecting with the
confluence pipe. (about 100 mm)
Fig. 2-37
Drain hose connection
Use the clip (accessory)
Feed water
Drain up motor
Drain hose
Main drain pipe
Glue the joint
Drain
port
Fig. 2-38
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