Panasonic Inverter R32 Series Technical Data & Service Manual page 188

Installing the Drain Pipe
Prepare hard PVC pipe for the drain and connect it to the
indoor unit drain pipe with the supplied hose band to prevent
water leaks.
Measure the thickness of the wall from the inside to the
outside and cut PVC pipe at a slight angle to fit. Insert the
PVC pipe in the wall.
NOTE
The hole should be made at a slight downward slant to the
outside.
Indoor
side
Hard PVC pipe (not supplied)
INSIDE
Cut at slight angle
(1) Drain hose connection
The drain hose is connected below the refrigerant tubing.
(2) Installing the drain hose
First insert the drain hose (supplied) to the hose band
(supplied) and then install the drain hose to the unit drain port.
Insert until the drain hose bumps to the end.
Attach the hose band to make the fixed portion 45°upper
gradient according to a vinyl tape (not supplied) of the drain
hose (supplied).
Hose band screw torque is 30 - 35N · cm.
Wind the vinyl tape not to blow up the hose band.
Connect both the drain hose and PVC pipe (VP20 or similar
material, not supplied). Insert until the PVC pipe bumps to
the end and adhere with PVC adhesive.
CAUTION
Wrap the drain insulator (supplied) between the
connection of the drain hose and tubing not to expose
the copper tubing. Also, wrap the hose band together.
Wrap the hose band with the drain insulator, where
the screw is located facing upward. Then, tighten the
insulator with a vinyl tape not to cause the detachment.
If the tubing parts remain exposed, condensation may
occur.
Be sure to use the supplied drain hose.
If other commercially available hose bands are used, the
drain hose may become pinched or wrinkled and there is
danger of water leakage.
Therefore be sure to use the supplied hose bands.
Connect the drain pipe so that it slopes downward from the
unit to the outside.
Downward
slant:
min. 1/100
Correct
Outdoor
side
OUTSIDE
Wall
PVC pipe
Slight
angle
Upward
slant:
Incorrect
1-11-87
Never allow water traps to occur in the course of the piping.
Insulate any piping inside the room to prevent dripping.
After the drain piping, pour an appropriate amount of water
into the drain pan through the opening on the side of the air
discharge port. Check the water draining smoothly.
* If the drain hose is routed through the left side, see the figure
under the section "Shaping the Tubing" on page 1-11-86,
and follow the procedure above to install the hose.
Reattach the rubber stopper removed earlier onto the right
side.
The rubber stopper can be inserted easily by using a
screwdriver or similar tool to
press the stopper into the
drain port on the main unit.
Press the stopper into the
main unit drain port as far
as it will go.
Unit drain port
Hose band (supplied)
Drain hose (supplied)
Do not use adhesive.
Drain insulator (supplied)
26
Hose band
Vinyl tape
Drain insulator
Vinyl tape Drain insulator
CAUTION
The indoor unit should be slightly tilted downward toward
the drain pipe connection side as shown in figure below
so that the wastewater can flow smoothly without being
trapped in the middle.
Ceiling
Diagonally right down (front view)
(Ex.: Diagonal-right-backwards)
Ceiling
Diagonally backward (side view)
Drain port
Screwdriver
Rubber stopper
Hard PVC pipe
(VP20 not supplied)
Adhere with PVC adhesive.
26
130
Hose band
Approx. 1°
Approx. 2°
1