18
Indoor Unit
Installation
• Drain piping must have down-slope (1/50 to 1/100): be sure
not to provide up-and-down slope to prevent reversal flow.
• During drain piping connection, be careful not to exert
extra force on the drain port on the indoor unit.
• The outside diameter of the drain connection on the indoor
unit is 32mm(1-1/4 inch).
• Be sure to install heat insulation on the drain piping.
Piping material: Polyvinyl chloride pipe inner diometes
Ø 25mm(1 inch) and pipe fittings
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
• Connect the main drain pipe to the exterior and leave
it provisionally until the test comes to an end.
• Feed water to the flexible drain hose and check the
piping for leakage.
• Be sure to check the drain pump for normal operating
and noise when electrical wiring is complete.
• When the test is complete, connect the flexible drain
hose to the drain port on the indoor unit.
Heat insulation material: Polyethylene foam with
thickness more than 8mm(5/16 inch).
Drain test
Upward
routing
not allowed
Pipe clamp
1/50~1/100
MAX 700mm
(27-9/16 inch)
Flexible drain hose
Maintenance
drain port
Indoor unit
Feed water
Drain Pump
Drain pan
Flexible drain hose
Main
drain pipe
Glue the joint
Drain
port
Drain hose connection
Use the clip
Flexible drain hose
Drain Piping
CAUTION:
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method of wiring, be guided
by the circuit diagram posted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) The screws which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to
which the unit is subjected during the course of transportation. Check them and make sure that they are all
tightly fastened. (If they are loose, it could give rise to burn-out of the wires.)
4) Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification. (Particularly note the relation
between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) The following troubles would be caused by voltage drop-down.
• Vibration of a magnetic switch, damage on the contact point, fuse breaking, disturbance by the normal function of an
overload protection device.
• Proper starting power is not given to the compressor.
HAND OVER
Teach the customer the operation and maintenance procedures, using the operation manual.
(air filter cleaning, temperature control, etc.)
1/50~1/100
MAX 700mm
(27-9/16 inch)
Flexible drain hose
Flexible drain hose
Flexible drain hose
CAUTION : The supplied flexible drain
hose should not be curved, neither
screwed. The curved or screwed hose
may cause a leakage of water.
