3 DRAIN PIPING WORK
Connection procedure
Connect a socket and a hard vinyl chloride pipe.
•Using adhesive agent for vinyl chloride pipe, connect the drain pipes certainly so that water does not leak.
•It takes approx. 10 hours to dry and harden the adhesive agent. During this period, do not apply force to the connecting part with the drain pipe.
Perform heat insulating.
•As shown in the figure, cover the flexible hose and hose band with the attached heat insulator up to the bottom of the indoor unit without gap.
Flexible hose | Hose band |
Check the draining
In the test run, check that water drain is properly performed and water does not leak from the connecting part of the pipes.
Be sure to check draining also when installed in heating period.
Using a pitcher or hose, pour water (1500 to 2000cc) into the discharge port before installation of the ceiling panel.
Pour water gradually so that water does not spread on the motor of the drain pump.
Heat 
exchanger
Drain pan
Attached heat insulator | Heat insulator to be |
| procured locally |
| Hard vinyl chloride pipe |
Drain up
When a downward grading cannot be secured on the drain pipe,
Set downward grading immediately after raising up vertically.
Rising up 640mm or less | 850mm or less |
| up |
360mm | Rising |
or less |
|
Indoor unit
Underneath of ceiling
•After the electric work has finished, pour water during COOL mode operation.
•If the electric work has not yet finished, pull out the float switch connector (CN34 : Red) from the electric parts box, and check draining by plugging the single phase 220/230/240V power to the terminal blocks 1 and 2.
If doing so, the drain pump motor operates.
•Test water drain while checking the operation sound of the drain pump motor.
(If the operation sound changes from continuous sound to intermittent sound, water is normally drained.)
After the check, the drain pump motor runs, connecting the float switch connector.
(In case of check by pulling out the float switch connector, be sure to return the connector to the original position.)
|
| Single phase 220/230/240V |
| 1 | 2 |
|
| White |
CN34 |
| Red |
(RED) | Black |
|
|
|
Pull out connector CN34 (Red) from P.C. board. Black
37