Toshiba RAS-18YKH-E Service Manual page 18

TEMPORARY REMOTE CONTROL
AUTO
TEST RUN
(COOL)
Cord clamp
Screws
Grounding
wire
Terminal block
Connecting
Wiring cover
cable Screw
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.
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.
Outward form of indoor unit
R 40mm (Use polisin (polyethylene core)
or the like for bending pipe.)
Use the handle of screwdriver,etc.
Fig. 8-3-13
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.
Slit part
Pipe holder
Pipe holder Rear plate
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.
Indoor unit
Auxiliary
Connecting
pipes
cable
Installation
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.
Hook here
Pull the indoor unit
1
toward you by the
1 Installation
lower part to confirm plate
2
that it is firmly
Hook here
hooked up on the
installation plate.
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
Space for pipes
at a height above the drain
Fig. 8-3-17
guide.
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.
Do not rise the drain hose. Do not form the drain hose
into the waved shape.
50 mm
or more
Do not put the Do not put the drain
drain hose end hose end in the
into water. 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.
Shield pipe
Drain hose Inside the room Extension drain hose
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
 ‚ ƒ
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.
Push Push Push
3 1
Fig. 8-3-20
8-3-8. Gas Leak Test
• Check the flare nut connections, valve stem cap
connections and service
Electric parts
cap connections for gas
cover
leak with a leak detector
or soap water.
Wall
Flare nut
Drain
guide connections
(Outdoor unit)
Fig. 8-3-21
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 REMOTE CONTROL
AUTO
TEST RUN
(COOL)
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
2
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
C about 3 minutes when it is restarted
D
immediately after operation.
¨
9. Check the remote control operation when
it is at fixed position.
Flare nut
connections
(indoor unit)
When finished the check and test operation,
Valve stem
make sure to return the TEMPORARY switch
cap connection
to REMOTE CONTROL.
A
¨ 10. Explain to the customer on the correct
Service cap
connection
usage of air conditioner with simple
B
Valve stem cap connection layman's terms.