– 18 –
Fig. 8-3-11
8-3-5. Piping and Drain Hose Installation
Left-hand connection with piping
• After scribing slits of the rear
panel by a knife or a marking-
off pin, cut them by a pair
of nippers or the like.
Grounding
wire
Connecting
cable
Terminal block
Screw
Cord clamp
Wiring cover
Screws
TEMPORARY
AUTO
TEST RUN
(COOL)
REMOTE CONTROL
2
1
Slit (rear panel)
Fig. 8-3-12
Bend the connecting pipe so that it is laid within 52
mm above the wall surface. If the connecting pipe is
laid exceeding 52 mm above the wall surface, the
indoor unit may unstably be set on the wall.
When bending the connecting pipe, make sure to use
spring bender so as not to crush the pipe.
Bend the connecting pipe within a radius of 40 mm.
NOTE
If the pipe is bent incorrectly, the indoor unit would be
unstably set on the wall and the air conditioner might
be raised.
1. When the piping runs to the left, remove the left
side body bushing of the rear panel. You may need
the body bushing when you relocate the unit, so
be sure to make customer keep it in a safe place.
2. After passing the connecting pipe through the pipe
hole, connect the connecting pipe to the auxiliary
pipes and wrap facing tape around them.
Fig. 8-3-13
Outward form of indoor unit
R 40mm (Use polisin (polyethylene core)
or the like for bending pipe.)
52 mm
Use the handle of screwdriver,etc.
80˚
Underside connection with piping
1. Cut out the knock-out piece from the right below of
the rear plate with a knife, etc. Smooth the cut
edges.
Fig. 8-3-14
CAUTION
• Bind the auxiliary pipes (two) and connecting
cable with facing tape tightly. In case of leftward
piping and rear-leftward piping, bind the
auxiliary pipes (two) only with facing tape.
Slit part
Pipe holder
Pipe holder
Rear plate
Fig. 8-3-15
• Carefully arrange pipes so that any pipe does
not stick out of the rear plate of the indoor unit.
• Carefully connect the auxiliary pipes and
connecting pipes to each other and cut off the
insulating tape wound on the connecting pipe to
avoid double-taping at the joint, moreover, seal
the joint with the vinyl tape, etc.
• Since dewing results in a machine trouble,
make sure to insulate both the connecting
pipes. (Use polyethylene foam as insulating
material.)
• When bending a pipe, carefully do it not to
crush it.
8-3-6. Indoor Unit Fixing
1. Pass the pipe through the hole in the wall, and
hook the indoor unit on the installation plate at the
upper hooks.
2. Swing the indoor unit to right and left to confirm
that it is firmly hooked up on the installation plate.
3. While pushing the indoor unit onto the wall by the
lower part, hook it up on the installation plate by
the lower part.
Pull the indoor unit
toward you by the
lower part to confirm
that it is firmly
hooked up on the
installation plate.
Indoor unit
Connecting
cable
Installation
plate
Auxiliary
pipes
1
Installation
plate
Hook here
Hook here
1
2
Space for pipes
Wall
Drain
guide
Fig. 8-3-16
This air conditioner has the
structure designed to drain
water collected from dew,
which forms on the back of the
indoor unit, to the drain pan.
Therefore, do not store the
power cord and other parts
at a height above the drain
guide.
Fig. 8-3-17
8-3-7. Drainage
1. Run the drain hose sloping downwards.
NOTE
• Hole should be made at a slight downward slant to
the outdoor side.
50 mm
or more
Do not rise the drain hose.
Do not form the drain hose
into the waved shape.
Do not put the
drain hose end
into water.
Do not put the drain
hose end in the
drainage ditch.
Fig. 8-3-18
2. Put water in the drain pan and make sure that the water
is drained out of doors.
3. When connecting extension drain hose, insulate the
connecting part of extension drain hose with shield
pipe.
Fig. 8-3-19
CAUTION
Arrange the drain pipe for proper drainage from the
unit. Improper drainage can result in dew-dropping.
How to install the front panel on the indoor unit
Install the front panel through the opposite order of “How
to remove the front panel”.
When the panel is removed and mounted again, take the
following action : After fastening the 6 screws, be sure to
hook the inside clicks
,
, and
of the front panel
shown in the diagram, right gap is between the front panel
and the rear plate.
• If cooling (dry) operation is made without pushing the air
outlet, dew can be deposited on the front panel surface.
In addition, a gap between the front panel and the body
will become wider, spoiling the appearance.
Shield pipe
Extension drain hose
Inside the room
Drain hose
3
1
2
Push
Push
Push
Fig. 8-3-20
8-3-8. Gas Leak Test
• Check the flare nut connections, valve stem cap
connections and service
cap connections for gas
leak with a leak detector
or soap water.
Fig. 8-3-21
Flare nut
connections
(indoor unit)
Electric parts
cover
Flare nut
connections
(Outdoor unit)
A
B
C
D
Valve stem cap connection
Valve stem
cap connection
Service cap
connection
8-3-9. Check and Test Operation
¨
1. Check the unit is firmly hooked up on the
installation plate.
¨
2. Check the connecting pipes tightened
securely.
Confirm that there is no gas leakage.
¨
3. Confirm that all connecting cables are
secured and correct.
¨
4. Check the pipe insulation.
¨
5. Check the drainage.
¨
6. Connection of the grounding wire.
¨
7. To switch the TEST RUN (COOL) mode,
turn the switch on.
TEMPORARY
AUTO
TEST RUN
(COOL)
REMOTE CONTROL
Fig. 8-3-22
Make sure to return the TEMPORARY switch
to REMOTE CONTROL.
Three-minutes protection feature
A protection feature prevents the air
conditioner from being active for about 3
minuets when it is restarted immediately
after operation.
¨
8. Operate the unit at cooling operation
mode for fifteen minutes or more.
Measure the temperature of the intake
and discharge air. Ensure the difference
between the intake temperature and the
discharge one is more than 8°C.
NOTE: Three-minutes protection feature
A protection feature prevents the air
conditioner from being activated for
about 3 minutes when it is restarted
immediately after operation.
¨
9. Check the remote control operation when
it is at fixed position.
When finished the check and test operation,
make sure to return the TEMPORARY switch
to REMOTE CONTROL.
¨
10. Explain to the customer on the correct
usage of air conditioner with simple
layman’s terms.
