Haier AB242ACBEA Service Manual page 45

(d) When constructing drain piping for several units, position
the common pipe about 100 mm below the drain outlet
of each unit as shown in the sketch. Use VP-30(11/4")
or thicker pipe for this purpose.
(e)
Be sure to provide heat insulation to hard PVC pipes of
indoor placement.
Do not ever provide an air vent.
(f)
(g)
The height of the drain head can be elevated up to a
point 500 mm 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
higher than 500 mm, the back-flow quantity of drain at
the event 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 within the distance
given in the sketch below.
(h)
Avoid positioning the drain piping outlet at a place where
generation of odor may be stimulated. Do not lead the
drain piping direct into a sewer from where sulfur gas
Drainage Test
Conduct a drainage test after completion of the electrical work.
1
2 During the trial, make sure that drain flows properly through the piping and that no water
leaks from connections.
In case of a new building, conduct the test before it is furnished with the ceiling.
3
Be sure to conduct this test even when the unit is installed in the heating season.
4
Procedures
Supply about 1000 cc of water to the unit through the air outlet using a feed water
1
2
pump.
Remove grommet.
Make sure to install
it back after test.
Main unit
Drain situation can be checked with transparent socket
Insert water supply hose
for 20 mm ~ 30 mm to
supply water.
(Insert hose facing
toward bottom.)
Attached drain hose clamp
Drain piping
A downhill grade of
1/100 or more
290~325mm
Drain hose
Joint for VP 25
(Local procurement)
Pour water into a convex joint.
(In the electrical work has not been
completed, connect a convex joint in the
drain pipe connection to provide a water
inlet. Then, check if water leaks from the
piping system and that drain flows through
Secure the elevation as high as possible
(approx. 100 mm)
VP 30
Right overhead