Indoor Unit
185
Super Match
(b) When connecting the drain pipe to unit, pay sufcient
attention not to apply excess force to the piping on the unit
side. Also, x the piping at a point as close as possible to
the unit.
(c) For drain pipe, use hard PVC general purpose pipe
VP-25(I.D.1”) which can be purchased locally. When
connecting, insert a PVC pipe end securely into the drain
socket before tightening securely using the attached drain
hose and clamp. Adhesive must not be used connection of
the drain socket and drain hose (accessory).
(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) The stiff PVC pipe put indoor side should be heat insulated
(f) Avoid putting the outlet of drain hose in the places with irritant gas generated. Do not insert the drain hose
directly into drainage, where the gas with sulfur may be generated.
(g) Because the drain spout is at the position, which negative
pressure may occur. So with the rise of water level in the
drain pan, water leakage may occur. In order to prevent
water leakage, we designed a backwater bend. The
structure of backwater bend should be able to be cleaned.
As the right gure shown, use T type joint. The backwater
bend is set near the air conditioner.
As gure shown, set a backwater bend in the middle of
drain hose.
Drainage Test
(1) conduct a drainage test after completion of the electrical work.
(2) During the trial, make sure that drain ows properly through the piping and that no water leaks from connections.
(3) In case of a new building, conduct the test before it is furnished with the ceiling.
(4) Be sure to conduct this test even when the unit is installed in the heating season.
Procedures
(a) Supply about 1000 cc of water to the unit through the air outlet using a feed water
pump.
(b) check the drain while cooling operation
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