Water heat exchange unit
H - 21
6. Installation construction
Warning
Caution
(4)Drain piping construction
● Do not use the same drain pipe for both the outdoor unit and the indoor units. This could cause
poisoning due to flow of exhaust gas indoors.
● Do not connect the indoor unit drain pipe to a gutter in which sulfurous or other harmful gases are
generated. This could result in harmful gases leaking indoors, and causing poisoning.
● Connect the drain pipes in accordance with “To those undertaking installation construction”, and
provide sufficient insulation so that condensation is not generated. If there is a defect in the piping
then this could cause water leaks, and leakage into property.
● he drain is should allow the water to run naturally, so provide a downward slope of 1/100 or greater. If
an upward slope is provided then drainage water will flow backwards, and cause leaks.
● After completion of the piping, check the drains to make sure that there are no leaks, and apply
insulation to the drain part located indoors. Otherwise, this could cause water leaks or condensation.
3 Drain openings are provided in two locations (25A) on the water heat exchanger unit (front and rear). The
side that is not being used should be closed with a stopper (supplied on site).
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