13
English
•
Install the indoor unit leveled
If the unit is inclined and the drain piping side gets high, it may cause malfunction of a float switch and
results in water leakage.
However, for 2-way air discharge, install the unit inclined 1° downward to the drain piping.
•
Attach nuts on the upper and lower side of hanger
If there is no upper nut and the lower nut is over-tightened, the hanging plate and the top plate will
deform and cause abnormal sound.
•
Do not insert materials other than that specified into the clearance between the hanger and the washer
for hanger (3).
Unless the washers are properly attached, the hanging bolts may come off from the hanger.
WARNING
The indoor unit must be securely installed on a place that can withstand the mass.
If the strength is insufficient, the unit may fall down and cause injuries.
6. REFRIGERANT PIPING WORK
•
For the outdoor unit refrigerant piping, refer to the installation manual attached to the outdoor unit.
•
Carry out insulation of both gas and liquid refrigerant piping securely. If not insulated, it may cause water
leakage. For gas piping, use insulation material of which heat resistant temperature is not less than 120°C.
For use under high humidity, strengthen the insulation material for refrigerant piping. If not strengthened,
the surface of insulation material may sweat.
•
Before installation work, make sure that the refrigerant is R410A. (Unless the refrigerant is R410A, the nor-
mal operation cannot be expected.)
CAUTION
This air conditioner is a dedicated model for new refrigerant R410A. Make sure to meet the requirements
shown below and carry out installation work.
•
Use dedicated piping cutters and flaring tools for R410A.
•
When making a flare connection, coat the flared inner surface only with either oil or ester oil.
•
Use only the flare nuts attached to the air conditioner. If other flare nuts are used, it may cause refrigerant
leakage.
•
To prevent contamination or moisture from getting into the piping, take measures such as pinching or tap-
ing the piping.
Do not mix substance other than the specified refrigerant such as air into the refrigeration circuit.
If the refrigerant leaks during the work, ventilate the room.
Fig.17
Level must be ensured
Fig.18
Piping part
Level
Piping part
4
4
1
1
2
2
3
3
01_EN_3P177351-6P.fm Page 13 Sunday, September 30, 2012 1:52 PM