13
3-7. Duct for Fresh Air
There is a duct connection port (knock-out hole) at the right-
rear on the Panel Top of the indoor unit for drawing in fresh air.
If it is necessary to draw in fresh air, remove the cover by
knocking out and connect the duct to the idoor unit throught the
connection port. (Fig. 3-27)
If connection at the right-rear on the Panel Top is not
appropriate, another duct connection port can be made by
cutting an opening on the left side of the Rear Panel of the
indoor unit as shown in Fig. 3-28.
3-8. Installing the Drain Piping
• Prepare a standar PVC pipe for the drain and connect it to
the indoor unit drain pipe with the supplied hose clamps to
prevent water leaks.
CAUTION
• Tighten the drain pipe clamps so that the locking nuts
are facing upwards. (If tightened with the locking nuts
facing downwards, it may cause water leakage).
• Do not use an adhesive when connecting the drain
hose (supplied) to the drain connection (main unit,
PVC pipe).
• Connect the drain piping so that it slopes downward from
the unit to the outside. (Fig. 3-29)
• Never allow traps to occur in the course of the piping.
• Insulate any piping inside the room to prevent dripping.
• Use the supplied drain pipe to connect the drain pipe with the
drain outlet of the indoor unit.
• After connecting the drain pipe securely, wrap the supplied
drain pipe insulator around the pipe, seal the gap at the drain
socket with the supplied black insulation tape, then secure
it with clamps. (Fig. 3-30)
• After the drain piping, pour water into the drain pan to check
that the water drains smoothly.
CAUTION
• Check local electrical
codes and regulations
before obtaining wire.
Also, check any spe-
cified instruction or li-
mitations.
Duct connection port
(Knock-out hole)
Panel Top
Right side
Right side
Cut this portion
Fig. 3-27
Fig. 3-28
Fig. 3-29
Fig. 3-30
A
B
C
425
110
100
100
110
100
150
436
448
Min. 1/100
Good
Not good
Drain hose
(supplied)
Drain pipe camp
(supplied)
Hard PVC pipe
(not supplied)
Vinyl clamp
(supplied)
Packing
(supplied)
EG
Fig. 3-25
Fig. 3-26
Indoor side
Outdoor side
PVC pipe (localy purchased)
INSIDE
OUTSIDE
PVC pipe
Slight
angle
Cut at slight angle
Wall