Installation Procedures
Place where air circulates.
Place free from heat radiation from other heat sources.
Place where drain water may be discharged.
Place where noise and hot air may not disturb the neighbors.
Place where there is not heavy snowfall in winter.
Place where obstacles do not exist near the inlet air port and outlet air port.
Place where the outlet port may not be exposed to a strong wind.
Place surrounded at four sides are not suitable for installation. A 1m or more
of overhead space is needed for the unit.
Mount guide-louvers to place where short-circuit is a possibllity.
When installing several units, secure sufficient suction space to avoid short circuiting.
2. Installation of outdoor unit
Note (1)Place the concrete foundation
deep enough.
Note (1)Give enough room for the concrete
foundation to fix anchor bolts.
Install the unit so that the angle of inclination must be less than 3 degrees.
1.Selection of hte place of installation
Select the place of installation satisfying the following conditions and, at the same time,
obtain consent from the client or user.
Fix the unit in a proper way according to the condition of a place where it is installed by
referring to the following.
Fig. 22
(3) Limitations for one way piping length and
vertical height difference.
(2) Piping size
Install the removed flare nuts to the pipes to be
connected, then flare the pipes.
90 0.5
3. Refrigerant piping
(1) Outline of piping
Outdoor
unit
3-way valve
Flare connection
Gas pipe
Liquid
pipe
Flare connection
Indoor
unit
3-way valve
One way piping length: Less than 15 mm
Vertical height difference: Less than 5 m
Precautions for refrigerant piping
(Fig. 23)
Do not twist or crush piping.
Be sure that no dust is mixed in piping.
Bend piping with as wide angle as possible.
Keep insulating both gas and liquid piping.
Check flare-connected area for gas leakage.
(b) Foundation anchor
(a) Concrete foundation(Fig. 22)
Anchor bolt
Concrete foundation
Unit
Unit
Concrete foundation
Anchor bolt
Connecting method
Apply refrigerant oil at half union as large and flare nut.
To bend a pipe, give the roundness as possible not to
crush the pipe.
When connecting pipe, hold the pipe centre to centre
then screw nut on by hand, refer to Fig.
Be careful not to let foreign matters, such as sands
enter the pipe.
(4) Piping connection (Fig.23)
Forced fastening without
centering may damage
the threads and cause a
gas leakage.
Pipe dia
Fastening
torque N.m
Gas pipe 12.7mm
Liquid pipe 6.35mm
49.0
11.8
14
Gas pipe
12.7x0.8mm
6.35x0.8mm
Liquid pipe
AC142ACERA
AC182ACERA
AC242ACERA
15.88x1.0mm
9.52x0.8mm
40
Gas pipe 15.88mm
60
Liquid pipe 9.52mm
