2
I
NSTALLATION
EXAMPLE
;;;;
;;;;
5
2
3
4
1
1. Ceiling slab.
4. Suspension bolt.
2. Anchor.
5. Indoor unit.
3. Long nut or turn-buckle.
Note:
Mentioned parts are field supplied.
I
NDOOR
UNIT
INSTALLATION
When installing optional accessories, refer to the instruction manual
of each optional accessory. Depending on the field conditions, it
may be easier to install optional accessories before the indoor unit
is installed.
1. Install the indoor unit temporarily.
• Attach the hanger bracket to the suspension bolt. Be sure to
fix it securely by using a nut and washer from the upper and
lower sides of the hanger bracket.
2
1
2
3
A liquid line and gas line must be provided between the
condensing and the air conditioning unit.
• The outdoor unit is charged with refrigerant.
• Use a pipe cutter and flare suitable for the used refrigerant.
• The liquid line must be connected to the air conditioning unit via
a flare connection. The gas line must be welded directly to the
air conditioning unit piping. In case of a FDY125 unit, both the
liquid line and the gas line must be connected to the air
conditioning via a flare connection.
• In case of flare connections, flare the pipe end neatly to avoid
refrigerants leaks.
• Be sure to use both a spanner and torque wrench together when
connecting or disconnecting pipes to/from the unit (Refer to
Fig. 4).
• Refer to the table below for the dimensions of flare nut spaces.
• If R407C refrigerant is used, apply ether or ester oil around the
flare portions before connecting.
• Refer to the table above to determine the proper tightening
torque. (Overtightening may damage the flare and cause leaks.)
• Check the pipe connector for gas leaks.
• Wrap only the gas line side of the insulation for fitting (union) with
the sealing pad (attached).
V
ACUUM
DRYING
OF
INSTALLATION
Refer to the installation manual of the outdoor unit.
D
RAIN
PIPING
WORK
Caution
• The drain hose must slope downward to the outdoor side.
• Do not use a trap in the drain piping.
• Never put the end of the drain in to water.
Coat here with refrigerating machine oil.
1. Field procurement.
2. Washer for hanger bracket.
3. Tighten (double nut).
2. Do not install the unit tilted.
(If the unit is tilted against condensate flow, water can drip out of
the drain pan).
Check if the unit is levelled at all four corners with a water level
(1) or a water-filled vinyl tube (2)( Refer to Fig. 3).
3. Tighten the upper nut.
4. An air filter is installed to prevent dust accumulation on the heat
exchanger this will prolong the lifetime of the unit.
5. Connect the air inlet to the air inlet ducting and the air outlet to
the air outlet ducting. Always provide a flexible connection
between the ducting flanges of the air conditioner and the ducts
to prevent vibrations and noise generation.
Caution
Ensure that a protective guard is installed in front of the air
outlet to prevent that the fan blades be touched. The protection
must comply with relevant local and national regulations.
R
EFRIGERANT
PIPING
WORK
All field piping must be installed by a licensed refrigeration
technician and must comply with relevant local and national
regulations.
For refrigerant piping of outdoor unit, see the installation manual
attached to the outdoor unit.
R = 0.4~0.8
45
° ±
2
90
°±
0.5
A
Pipe size
Tightening torque (N
•
cm)
12.0 ~ 12.4
3270 ~ 3990 N•cm
(333 ~ 407 kgf•cm)
Ø 9.5
A (mm)
Flare shape
15.4 ~ 15.8
4950 ~ 6030 N•cm
(504 ~ 616 kgf•cm)
Ø 12.7
18.6 ~ 19.0
6180 ~ 7540 N•cm
(630 ~ 770 kgf•cm)
Ø 15.9
22.9 ~ 23.3
9720 ~ 11860 N•cm
(990 ~ 1210 kgf•cm)
Ø 19.1
