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C: Putting nut on
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)
D: Flaring work
Firmly hold copper pipe in a die in the
dimension shown in the table below.
Outer diam.
(mm)
6.35
9.52
12.7
12.7
16
Tightening Connection
Align the center of the pipes.
Sufficiently tighten the flare
nut with fingers, and then tighten
it with a spanner and torque wrench
as shown in Fig.20 & 21.
Outer
Tightening
diam.
torque(N.cm)
1500
6.35
(153kgf.cm)
2500
9.52
(255kgf.cm)
3500
12.7
(357kgf.cm)
4500
16
(459kgf.cm)
Caution
Excessive torque can break nut
depending on installation conditions.
Electrical work
Electric safety regulations for the initial Installation
1. If there is serious safety problem about the power supply, the technicians should refuse
to install the air conditioner and explain to the client until the problem is solved.
2. Power voltage should be in the range of 90%~110%of rated voltage.
3. The creepage protector and main power switch with a 1.5 times capacity of Max. Current
of the unit should be installed in power circuit.
4. Ensure the air conditioner is grounded well.
5. According to the attached Electrical Connection Diagram located on the panel of the outdoor
unit to connect the wire.
6. All wiring must comply with local and national electrical codes and be installed
by qualified and skilled electricians.
7. An individual branch circuit and single receptacle used only for this air conditioner must be
available. See the following table for suggested wire sizes and fuse specifications:
A(mm)
Max.
Min.
1.3
0.7
1.6
1.0
1.8
1.8
1.0
1.0
2.2
2.4
Additional tightening
torque(N.cm)
1600
(163kgf.cm)
2600
(265kgf.cm)
3600
(367kgf.cm)
4700
(479kgf.cm)
ELECTRICAL WORK
Copper tube
Bar
Copper pipe
Clamp handle
Indoor unit tubing
9
Flare nut
Fig.18
Handle
Bar
Yoke
Cone
Red arrow mark
Fig.19
Flare nut
Pipings
Fig.20
Fig.21
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