Transportation Of The Unit; Installation Of The Unit; Pipe Installationi; Flare Connection (Pipe Connection) - Fujitsu aoyg18lac2 Installation Manual

3. 4.

Transportation of the unit

Do not touch the fi ns. Otherwise, personal injury could result.
When carrying the unit, hold the handles on the right and left sides and be careful.
If the outdoor unit is carried from the bottom, hands or fi ngers may be pinched.
• Be sure to hold the handles on the sides of the unit. Otherwise, holding the suction grille
on the sides of the unit may cause deformation.
3. 5.

Installation of the unit

• Install 4 anchor bolts at the locations indicated with arrows in the fi gure.
• To reduce vibration, do not install the unit directly on the ground. Install it on a secure
base (such as concrete blocks).
• The foundation shall support the legs of the unit and have a width of 50mm or more.
• Depending on the installation conditions, the outdoor unit may spread its vibration during
operation, which may cause noise and vibration. Therefore, attach damping materials
(such as damping pads) to the outdoor unit during installation.
• Install the foundation, making sure that there is enough space for installing the connection
pipes.
• Secure the unit to a solid block using foundation bolts. (Use 4 sets of commercially
available M10 bolts, nuts, and washers.)
• The bolts should protrude 20mm. (Refer to the fi gure.)
• If overturning prevention is required, purchase the necessary commercially available
items.
AIR
Bottom side
Fix securely with bolts on a solid block. (Use 4 sets of commercially available M10 bolt,
nut and washer.)
En-5
WARNING
CAUTION
Handle
540 mm
Bolt
Nut
Block
4. PIPE INSTALLATION I
4. 1.

Flare connection (pipe connection)

Do not use mineral oil on a fl ared part. Prevent mineral oil from getting into the system
as this would reduce the lifetime of the units.
While welding the pipes, be sure to blow dry nitrogen gas through them.
The maximum lengths of this product are shown in the table. If the units are further
apart than this, correct operation cannot be guaranteed.
Flaring
• Use special pipe cutter and fl are tool exclusive for R410A.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that the cuttings will not enter the pipe and remove any
burrs.
(3) Insert the fl are nut (always use the fl are nut attached to the indoor and outdoor units
respectively) onto the pipe and perform the fl are processing with a fl are tool. Leakage
of refrigerant may result if other fl are nuts are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
Check if [L] is fl ared uniformly
and is not cracked or scratched.
Die
L
Dimension A (mm)
Pipe outside
Flare tool for R410A,
diameter [mm (in.)]
clutch type
6.35 (1/4)
9.52 (3/8)
12.70 (1/2) 0 to 0.5
15.88 (5/8)
19.05 (3/4)
• When using conventional fl are tools to fl are R410A pipes, the dimension A should be
approximately 0.5mm more than indicated in the table (for fl aring with R410A fl are tools) to
achieve the specifi ed fl aring. Use a thickness gauge to measure the dimension A.
Width across fl ats
Pipe outside diameter
[mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
4. 1. 1. Bending pipes
To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of
curvature of 100mm or more.
If the pipe is bent repeatedly at the same place, it will break.
• If pipes are shaped by hand, be careful not to collapse them.
• Do not bend the pipes at an angle of more than 90°.
• When pipes are repeatedly bent or stretched, the material will harden, making it diffi cult to
bend or stretch them any more.
• Do not bend or stretch the pipes more than 3 times.
4. 1. 2. Pipe connection
Be sure to install the pipe against the port on the indoor unit and the outdoor unit
correctly. If the centering is improper, the fl are nut cannot be tightened smoothly.
If the fl are nut is forced to turn, the threads will be damaged.
Do not remove the fl are nut from the outdoor unit pipe until immediately before
connecting the connection pipe.
After installing the piping, make sure that the connection pipes do not touch the
compressor or outer panel. If the pipes touch the compressor or outer panel, they will
vibrate and produce noise.
CAUTION
B
A
Pipe
0
Dimension B
- 0.4
9.1
13.2
16.6
19.7
24.0
Width across fl ats of Flare nut
[mm]
17
22
26
29
36
CAUTION
CAUTION
[mm]