English
7
WARNING
•
Install the BS unit in a level orientation.
Installing the unit in an inclined orientation so that the drain pipe side is higher may result in water leak-
age.
•
Attach nuts on both the top and bottom of the hanging brackets.
Overtightening the lower nut without the upper nut in place may cause the hanging bracket and top plate
to deform, causing the unit to produce abnormal noise.
Within 1°
Drain socket
Drain socket
<Unit as seen from the front of the control box>
Good
Wrong
6. REFRIGERANT PIPING WORK
•
For instructions for installing piping between the outdoor unit and the BS unit, selecting a refrigerant
branch kit, and installing piping between the refrigerant branch kit and indoor units, refer to the installa-
tion manual and included with the outdoor unit.
•
Before beginning the work, be sure to verify that the type of refrigerant used is R410A.
(The unit will not operate correctly with a different type of refrigerant.)
•
Insulate all of the piping, including the liquid pipes, HP/LP gas pipes, suction gas pipes, gas pipes, and
the pipe connections for these.
Not insulating these pipes could result in water leaks or burns.
In particular, low-temperature gas flows in the HP/LP gas piping during full cooling operation, so the
same amount of insulation as used for the suction gas pipes is required.
In addition, high-temperature gas flows in the HP/LP gas piping and gas piping, so use insulation that
can withstand more than 120°C.
•
Select insulation material as necessary for the installation environment.
For details, refer to the Engineering date book.
If you fail to do so, condensation could form on the surface of the insulation.
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