9
ELECTRICAL WORK
Caution
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.
1
1
&
1
2
Tightening Connection
Excessive torque can break nut
depending on installation conditions.
The 24
k
indoor unit can only be connected with
A system, if there are two 24
k
indoor units,
they can be connected with A and B system.
(Fig.
1
3
)
Fig.
1
2
Indoor unit tubing
Flare nut
Pipings
Fig.
1
1
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. A separate over current protection device and disconnect switch should be used for each unit.
4.
Ensure the air conditioner is grounded well.
5. Refer
to the attached Electrical Connection Diagram located on panel of 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.
Electrical work
Electric safety regulations for initial Installation
Outer
diam.
Indoor unit capacity
Tightening
torque(N
·
cm)
Liquid
Additional tightening
torque(N
·
cm)
Gas
[
6.35
]
9
k
/12
k
[
12.7
]
24
k
[
9.52
]
18
k
1500
(
11.1 lbf
·
ft.
)
1 / 4
1600
(
11.8 lbf
·
ft.
)
3 / 8
3500
(
25.8 lbf
·
ft.
)
1 / 4
3600
(
26.6 lbf
·
ft.
)
5 / 8
2500
(
18.4 lbf
·
ft.
)
1 / 4
2600
(
19.2 lbf
·
ft.
)
1 / 2
When select a 24k indoor unit
Fig.
1
3
Unit:in
Connective pipe size of A and B system:
A(1/2in)
A(1/4in)
B(3/8in)
B(1/4in)
C(3/8in)
C(1/4in)
1/4"
3/8"
1/2"
Summary of Contents for 18k
Page 19: ...NOTES...
