– 7 –
5
Drain piping
CAUTION
Condensate drain piping installation and material must comply with applicable codes and regulations for the
specific indoor installation.
The condensate drain piping must be insulated to prevent sweating. All material used in the plenum space above
the ceiling must comply with applicable codes and regulations. If the condensate drain exits the unit downward
(gravity flow) the slope and suspension methods used for the condensate drain piping must comply with applicable
codes and regulations.
• The drain pipe must be sloping downward (at an angle of 1/100 or more), and do not run the pipe up and down
(arched shape) or allow it to form traps. Doing so may cause abnormal sounds.
• Restrict the length of the traversing drain pipe to 65.6’ (20 m) or less. For a long pipe, provide support brackets
at intervals of 4’11” to 6’7” (1.5 to 2 m) to prevent flapping.
• Install the collective piping as shown in the following figure.
• Do not provide any air vents. Otherwise, the drain water will spout, causing water to leak.
• Do not allow any force to be applied to the connection area with the drain pipe.
Flexible hose
Use the attached flexible hose to adjust centre discrepancy of the hard vinyl chloride pipe or to adjust the angle.
• Do not use the flexible hose as stretched, or do not deform it more extent than that in the following figure.
• Fix the soft end of the flexible hose with the attached hose band.
• Use the flexible hose on a horizontal level.
4’11” to 6’7”
(1.5 to 2 m)
Support
bracket
Downward slope
1/100 or more
Arched shape
Trap
Downward slope
1/100 or more
(Collective
piping)
As long as possible
(Approx. 3.9” (100 mm))
Heat
insulator
Incorrect
VP30
OK
NO GOOD
max
45°
max
45°
90° Bend
Riser (Trap)
Top view
Side view
Side view
Air discharge
Side view
Air discharge
Air discharge
Adhesive inhibited:
Use the attached flexible hose and hose band for connecting the
drain hose to the clear drain socket.
If applying the adhesive, socket will be damaged and cause water
leakage.
Attached hose
band
Attached flexible
hose
Soft socket
Hard socket
Attached drain
socket
In
do
or
u
nit
Condensate drain connection
for ducted indoor unit, metric
size (not suitable for US size)
PVC stub.
Standard 1" PVC drain pipe installed
by field. Can also be converted at the
adapter to any other size/material
that may be required to comply with
applicable codes, or regulations.
Condensate drain connection
adapter (provided with indoor
unit). converts metric size unit
drain connection to standard
1" US size PVC connection.
(Hard socket)
Drain pipe
connecting port
(Transparent)
Align the attached hose band to
the end of hose, set the
tightening position upward, and
then tighten it.
Flexible hose
(Accessory)
Indo
or
u
n
it
Condensate drain connection
for ducted indoor unit, metric
size (not suitable for US size)
PVC stub.
Standard 1" PVC drain pipe installed by
field. Can also be converted at the
adapter to any other size/material that
may be required to comply with
applicable codes, or regulations.
13-EN
14-EN
+00EH99885401.book Page 7 Friday, March 2, 2012 11:01 AM
