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7.
Condensate Piping
Do not put the condensate pipe for the indoor unit into the drainage trench where corrosive gases
occur. Otherwise, poisonous gases flow into the room, which may cause poisoning.
● Ensure that the condensate pipe discharges water properly. If connected incorrectly, it may cause leaks
leading to property damage.
● Do not provide an upward slope or a rising part for the condensate pipe. Otherwise, the condensate water
will flow back into the unit and it may cause the water leakage when the unit operation is stopped.
● Do not connect the condensate pipe with a sanitary or sewage pipe or any other drainage pipe.
● When the main condensate pipe is connected with other indoor units, the connected position of each
indoor unit must be higher than the main pipe. The pipe size of the main condensate pipe must be large
enough according to the unit size and number of units.
● After performing condensate piping work and electrical wiring, ensure that water flows smoothly as in the
following procedures.
Perform condensate piping work and attach the insulations before refrigerant piping work.
(1) The position of the condensate pipe connection is shown in Figure 7.1.
(2) Prepare a polyvinyl chloride (PVC) pipe with 1-1/4 inches (32mm) outer diameter.
(3) Fasten the tube to the condensate hose with the adhesive agent and the field-supplied clamp. The
condensate piping must be performed with a downward slope of 1/25 to 1/100.
(4) Insulate the condensate pipe after connecting the condensate hose.
Suspension Bracket
(Field-Supplied)
90
o
Elbow Pipe (VP25)
(Field-Supplied)
Lift Piping for Drain-Up
(PVC Tube, VP25)
(Field-Supplied)
Condensate Hose
(L: 11-13/16 (300))
Indoor Unit
(Accessory)
Rubber
Condensate
Adapter
Pan
Condensate Pump
8-9/16 (217)
NOTE:
When the relative humidity of inlet or
ambient air exceeds 80%, apply an auxiliary
condensate pan (field-supplied) beneath the
indoor unit as shown in Figure 7.2.
P01432Q-rev.1
NOTICE
Condensate Piping (PVC Tube, VP25)
(Field-Supplied)
1/100 Down-Slope
2-5/16
(58)
14-1/4 (362)
1 (25)
Figure 7.1 Condensate Piping
Unit: inch (mm)
Common
Incorrect: Upward Slope
Unit
1/25 to 1/100 Down-Slope
Main Condensate Piping
Auxiliary Condensate Pan
(Field-Supplied)
Figure 7.2 Auxiliary Condensate Pan
Incorrect
Rising Part
Condensate Piping
Connection
Correct
This condensate pipe shall be
separating from other pipes.
Indoor Unit
To the Atmosphere
19
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