Specifications

175
(e) Drain test (Perform the drain test after the electrical wiring work has been finished.)
● Check that water is draining thoroughly during the test run, and that there are no water leaks from the joints.
● The test has to be performed even if the unit is installed in a season when the unit is used for heating.
● In a new house, perform the test before the ceiling is fitted.
1) Remove the grommet, and using a water pump, pour about
1000cc of water, from the position shown in the left fig-
ure.
Caution
When pour water, be sure to perform the drain pump
forced operation.
2) Check the drain-out section (transparent section) for nor-
mal flow of drainage.
3) Take off the drain plug to release the water. After water
release has been confirmed, replace the drain plug as it
was.
4 Be careful not to get splashed when pulling the drain
plug.
4) After the drain test, thoroughly insulate the drain pipe,
up to the main unit.
Forced drain pump operation
● Turn on dip switch SW5-3 on the PCB of the indoor unit. The drain pump will operates continuously.
● After the drain test, be sure to turn off the dip switch.
(If the electrical work has not been completed, connect a convex coupling to the drain pipe to provide a supply port and confirm
the draining status of the piping system.)
5) Be sure to provide heat insulation to hard PVC pipes of indoor placement.
6) Do not ever provide an air vent.
7) The height of the drain head may be elevated up to a point 600mm above the ceiling and, when an obstacle exists in the
ceiling space, elevate the piping to avoid the obstacle using an elbow or corresponding gadget. When doing this, if the
stretch for the needed height is too high, the back-fiow quantity of drain at the time of interruption of the operation gets too
much and it may cause overflow at the drain pan. Therefore, make the height of the drain pipe withing the distance given
in the drawing below.
8) Avoid positioning the drain piping outlet at a place where ganeration of odor may be stimulated. Do not lead the drain
piping direct into a sewer from where sulfur gas may generate.
295~325
Drain hose (accessory)
Joints for VP-25 (local procurement)
100 or less
600 or less
Piping
through cover
Pull in the water pump hose approximately
50 mm with its end facing down.
Remove grommet
Make sure to in stall
it back after test.
Drain hose
Indoor unit
Water drainage may be checked
through the translucent socket.
Unit : mm