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(d) When the laid drain piping is used for multiple equipments, the public
piping should be lower about 100mm than the wash ports of equipments, as
shown in the gure.
Thicker pipes should be used for this application.
(e) The hard PVC tube in the room must be provided with the heat insulating layer.
(f) Don't place the drainpipes at the places where there is irritant gas. Don't put the drainpipe directly into the sewer,
where there might be gases with sulfur.
(g) Backwater bend
Because the drainage was laid in the position of binging Subatmospheric pressure easily, gain of elevation of water
in the drain pan conduces Leakage water, for avoiding Leakage water, design a Backwater bend.
Conguration of Backwater bend can be cleaned, a " T " joint can be used in installing as shown as in the picture
below.
Backwater bend was installed in the neighborhood of air conditioning
A backwater bend was designed in the middle of drain pipe s shown as in the picture below.
Testing Drainage System
(a) After nishing the electrical system, test the drainage system.
(b) During testing, make sure that the water ow passes the piping correctly without any water leakage at the
connection.
(c) In the condition of new house, test the drainage system before tting up the ceiling.
(d) Even if it is installed in the season needed to heating, the testing should also be performed.
Procedures
(a) Charge 1000cc of water to the equipment via air outlet port.
(b) During cooling operation, check the drainage system.
I
G
Wash port
Master unit
Drainage hose
Thread clip
(accessory)
Binding
S
E
S
H
S
J
Wash port
Drainage hose
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