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2
CAUTION
Execute earthing for the unit. But the earthing wire can not be connected to the gas pipe, water
pipe, lightening rod or the telephone earthing wire. Improper earthing will cause electric shock.
Don't install the unit at the place where leaks the flammable gas. Or it will cause fire.
Execute the water drainage pipe according to the manual, improper installation will cause water
leakage to wet the family things.
The outdoor fan can not face to the flower or the other vegetable, or the blowing gas will make
the flower dried up.
Please ensure the maintenance room, if not, it will cause the maintenance person damaged.
When installing the unit on the roof or the other high place, to prevent the person falling down,
please set the fixed ladder and the railing at the passage.
Use the two-end spanner, and fasten the nut at proper torque. Don't fasten the nut excessively
against the flared setion broken. Or it will cause refrigerant leakage and lack of oxygen.
Take measures for heat insulation to the refrigerant pipe, or there will be water leakage or dew
drop to wet the family things.
After finishing the refrigerant pipe, make leakage test by charging the nitrogen. In case the
refrigerant leaks in a small room and exceeds the limited concentration, it will cause lack of
oxygen.
Don't use the other refrigerant except for R410A. The R410A pressure is 1.6 times higher than
R22 pressure. The refrigerant R410A tank is marked with pink sign.
Against charging different refrigerant, we changed the stop valve diameter of the R410A unit.
To enhance the compression consistance, we also changed the flared pipe dimension. Prepare
the R410A specially tools according to the below table.
R410A specially tool
gauge manifold
torque spanner
a
b
c
d
e
f
g
range:HP
＞
4.5MPa,LP
＞
2MPa
pressure:HP:5.3MPa,LP:3.5MPa
can not use the measurable charging tank
must be with reverse stop valve
can not use freon leakage detector, but the
He detector
Remarks
charge hose
electronic balance for
charging R410A
flare tool
copper pipe gauge for
adjusting projecting margin
vacuum pump adapter
leakage detector
When charging refrigerant, the refrigerant must be taken out as liquid state from the tank.
When installing indoor unit, outdoor, power cable and connecting wire, leave them at least 1m
away from the TV set or the radio against interference for the image or the noise.
In the room with fluorescent lamp (reverse phase or rapid start type), the remote signal may
be not reach the pre-set distance. The farther that indoor is away from fluorescent lamp, the
better.
Safety precaution
