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5. Installing the unit
5.1. Hanging the unit body
Bring the indoor unit to an installation site as it is packed.
To hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
[Fig. 5-1-1] (P.3)
A Unit body
B Lifting machine
[Fig. 5-1-2] (P.3)
C Nuts (field supply)
D Washers (accessory)
E M10 hanging bolt (field supply)
6. Refrigerant piping work
6.1. Refrigerant pipe
[Fig. 6-1-1] (P.3)
a Indoor unit
b Outdoor unit
Refer to the Instruction Manual that came with the outdoor unit for the restrictions on
the height difference between units and for the amount of additional refrigerant
charge.
Avoid the following places for installation where air conditioner trouble is liable to occur.
• Where there is too much oil such as for machine or cooking.
• Salty environment as seaside areas.
• Hot-spring areas.
• Where sulfide gas exists.
• Other special atmospheric areas.
• This unit has flared connections on both indoor and outdoor sides. [Fig. 6-1-1]
• Refrigerant pipes are used to connect the indoor and outdoor units as shown in the
figure below.
• Insulate both refrigerant and drainage piping completely to prevent condensation.
Piping preparation
• Refrigerant pipes of 3, 5, 7, 10 and 15 m [9-13/16, 16-3/8, 22-15/16, 32-1/4 and
49-3/16 ft] are available as optional items.
(1)Table below shows the specifications of pipes commercially available.
Outside
diameter
Model
Pipe
mm
inch
For liquid
6.35
1/4
PEAD-
A09AA8
For gas
9.52
3/8
For liquid
6.35
1/4
PEAD-
A12AA8
For gas
12.7
1/2
For liquid
6.35
1/4
PEAD-
A15AA8
For gas
12.7
1/2
For liquid
6.35
1/4
PEAD-
A18AA8
For gas
12.7
1/2
For liquid
9.52
3/8
PEAD-
A24AA8
For gas
15.88
5/8
For liquid
9.52
3/8
PEAD-
A30AA8
For gas
15.88
5/8
For liquid
9.52
3/8
PEAD-
A36AA8
For gas
15.88
5/8
(2)Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
(3)Refrigerant pipe bending radius must be 10 cm [3-15/16 in] or more.
Caution:
Using careful insulation of specified thickness. Excessive thickness prevents
storage behind the indoor unit and smaller thickness causes dew drippage.
6.2. Flaring work
• Main cause of gas leakage is defect in flaring work.
Carry out correct flaring work in the following procedure.
Min wall
Insulation
Insulation
thickness
thickness
material
mm
inch
mm
inch
0.8
1/32
8
5/16
0.8
1/32
8
5/16
0.8
1/32
8
5/16
0.8
1/32
8
5/16
0.8
1/32
8
5/16
0.8
1/32
8
5/16
Heat resisting
0.8
1/32
8
5/16
foam plastic
0.045 specific
0.8
1/32
8
5/16
gravity
0.8
1/32
8
5/16
1.0
1/32
8
5/16
0.8
1/32
8
5/16
1.0
1/32
8
5/16
0.8
1/32
8
5/16
1.0
1/32
8
5/16
5.2. Confirming the unit's position and fixing hanging
bolts
Ensure that the hanging bolt nuts are tightened to fix the hanging bolts.
To ensure that drain is discharged, be sure to hang the unit at level using a
level.
Caution:
Install the unit in horizontal position. If the side with drain port is installed
higher, water leakage may be caused.
6.2.1. Pipe cutting
[Fig. 6-2-1] (P.4)
a Copper tubes
b Good
c No good
d Tilted
e Uneven
f Burred
• Using a pipe cutter cut the copper tube correctly.
6.2.2. Burrs removal
[Fig. 6-2-2] (P.4)
a Burr
b Copper tube/pipe
c Spare reamer
d Pipe cutter
• Completely remove all burrs from the cut cross section of pipe/tube.
• Put the end of the copper tube/pipe to downward direction as you remove burrs in
order to avoid burrs drop in the tubing.
6.2.3. Putting nut on
[Fig. 6-2-3] (P.4)
a Flare nut
b Copper tube
• Remove flare nuts attached to indoor and outdoor unit, then put them on pipe/tube
having completed burr removal.
(not possible to put them on after flaring work)
6.2.4. Flaring work
[Fig. 6-2-4] (P.4)
a Flaring tool
b Die
c Copper tube
d Flare nut
e Yoke
• Carry out flaring work using flaring tool as shown below.
A (mm [in])
Pipe diameter
(mm [in])
When the tool for R410A is used
Clutch type
6.35 [1/4]
0 to 0.5 [0 to 1/32]
9.52 [3/8]
0 to 0.5 [0 to 1/32]
12.7 [1/2]
0 to 0.5 [0 to 1/32]
15.88 [5/8]
0 to 0.5 [0 to 1/32]
Firmly hold copper tube in a die in the dimension shown in the table at above.
6.2.5. Check
[Fig. 6-2-5] (P.4)
a Smooth all around
c Even length all around
e Tilted
g Cracked
i Bad examples
• Compare the flared work with a figure in right side hand.
• If flare is noted to be defective, cut off the flared section and do flaring work again.
Dimension
+0
B
(mm [in])
-0.4 [-1/32]
9.1 [3/8]
13.2 [17/32]
16.6 [21/32]
19.7 [25/32]
b Inside is shining without any scratches
d Too much
f Scratch on flared plane
h Uneven
13
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