En-5
3.3.1. Position the ceiling hole and hanging bolts
Ceiling openings and hanging bolt installation diagram.
WARNING
When fastening the hangers, make the bolt positions
•
uniform.
530 (Hanging bolt position)
540 (Hanging bolt position)
570(Indoor unit)
580 – 660 (Ceiling openings)
700 (Decoration Panel)
135
250
75
Drain pipe (O.D.ø25.4)
Min.450
40
99
102
114
215
30
262
30
58
123
Ceiling
Control box
Liquid pipe
Gas pipe
Unit : mm
150~200
Min.450
Maintenance
space
Be sure to keep suf
fi
cient space in the designated position
•
for future maintenance.
3.3.2. Body installation
Install special nut A, then special nut B onto the hanging
(1)
bolt.
Raise the body and mount its hooks onto the hanging bolt
(2)
between the special nuts.
Turn special nut B to adjust the height of the body.
(3)
WARNING
Perform
fi
nal tightening by tightening the double nut
•
fi
rmly.
Be sure to install the body horizontally and adjust the
•
height below the body and the ceiling surface properly.
Special nut B
Hook
Hanging bolt
30
or more
After installing the
body, tighten the nuts.
19
Ceiling
Special nut A
Unit : mm
3.3.3. Leveling
Using a level, or vinyl hose
fi
lled with water,
fi
ne adjust so that
the body is level.
Vinyl hose
4. PIPE INSTALLATION
CAUTION
Be more careful that foreign matter (oil, water, etc.) does
•
not enter the piping than with refrigerant R410A models.
Also, when storing the piping, securely seal the openings
by pinching, taping, etc.
While welding the pipes, be sure to blow dry nitrogen gas
•
through them.
4.1. Selecting the pipe material
CAUTION
Do not use existing pipes.
•
Use pipes that have clean external and internal sides
•
without any contamination which may cause trouble
during use, such as sulfur, oxide, dust, cutting waste, oil
or water.
It is necessary to use seamless copper pipes.
•
Material: Phosphor deoxidized seamless copper pipes.
It is desirable that the amount of residual oil is less than
40 mg/10 m.
Do not use copper pipes that have a collapsed, de-
•
formed, or discolored portion (especially on the interior
surface). Otherwise, the expansion valve or capillary
tube may become blocked with contaminants.
Improper pipe selection will degrade performance. As an
•
air conditioner using R410A incurs pressure higher than
when using conventional refrigerant, it is necessary to
choose adequate materials.
Thicknesses of copper pipes used with R410A are as shown
•
in the table.
Never use copper pipes thinner than those indicated in the
•
table even if they are available on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter [mm (in.)]
Thickness [mm]
6.35 (1/4)
0.80
9.52 (3/8)
0.80
12.70 (1/2)
0.80
15.88 (5/8)
1.00
19.05 (3/4)
1.20
