Service Manual

4. Installation Details
5.1 Wrench torque sheet for installation
Outside diameter
Torque
Additional tightening torque
mm
inch
N.cm
N.cm
Ф6.35
1/4
1500(153kgf.cm)
1600(163kgf.cm)
Ф9.52
3/8
2500(255kgf.cm)
2600(265kgf.cm)
Ф12.7
1/2
3500(357kgf.cm)
3600(367kgf.cm)
5.2 Connecting the cables
The power cord connection should be
selected according to the following
specifications sheet.
Unit
AWG
1 drive 2 type (18K outdoor unit)
14
1 drive 3 type (27K outdoor unit).
14
1 drive 4 type (36K outdoor unit)
12
1 drive 5 type (48K outdoor unit)
10
For indoor unit and outdoor unit connection
line, 16AWG is ok for all.
5.3 Pipe length and the elevation
Maximum piping length and height difference
1 drive 2
1 drive 3
1 drive 4
1 drive 5
Max. length for all
rooms (m)
30 (98ft)
45
(150ft)
60
(200ft)
75
(246ft)
Max. length for
one IU (m)
20
(65.6ft)
25 (82ft)
30 (98ft)
30 (98ft)
Max.
height
difference
between
IU and
OU (m)
OU
higher
than
IU
10 (33ft)
10 (33ft)
10 (33ft)
10 (33ft)
OU
lower
than
IU
15
(49.2ft)
15
(49.2ft)
15
(49.2ft)
15
(49.2ft)
Max. height
difference between
IUs (m)
10 (33ft)
10 (33ft)
10 (33ft)
10 (33ft)
Additional refrigerant charge
1 drive 2
1 drive 3
1 drive 4
1 drive 5
Chargeless pipe
length (m)
15
(49.2ft)
22.5
(73.8ft)
30
(98.4ft)
37.5
(123ft)
Additiona
l
refrigeran
t charge
g
15 x
(length
for all
rooms -
15)
15 x
(length
for all
rooms –
22.5)
15 x
(length
for all
rooms -
30)
15 x
(length
for all
rooms –
37.5)
oz
0.161
x(length
for all
rooms –
49.2)
(0.161
x(length
for all
rooms –
73.8)
0.161x(le
ngth for
all rooms
– 98.4)
.0.161x(le
ngth for
all rooms
–123)
Caution:
● Refrigerant pipe diameter is different
according to indoor unit to be connected.
When using the extension pipe, refer to the
tables below.
● When refrigerant pipe diameter is different
from that of the outdoor unit connector (18K
indoor unit) an additional adapter is required.
Indoor unit
Extension pipe diameter
(mm/inch)
Model
Pipe diameter
(mm/inch)
9K
Liquid
6.35(1/4)
Liquid
6.35(1/4)
Gas
9.52(3/8)
Gas
9.52(3/8)
12K 18K
Liquid
6.35(1/4)
Liquid
6.35(1/4)
Gas
12.7(1/2)
Gas
12.7(1/2)
24K
Liquid
9.52 (3/8)
Liquid
9.52 (3/8)
Gas
15.9(5/8)
Gas
15.9(5/8)
Outdoor unit union diameter (mm/inch)
1 drive 2
Liquid
6.35(1/4) *2
Gas
9.52(3/8) *2
1 drive 3
Liquid
6.35(1/4) *3
Gas
9.52(3/8) *3
1 drive 4
Liquid
6.35(1/4) *4
Gas
9.52(3/8) *4
1 drive 5
Liquid
6.35(1/4) *5
Gas
9.52(3/8) *3
12.7(1/2)*2
5.4 Installation for the first time
Air and moisture in the refrigerant system have
undesirable effects as below:
● Pressure in the system rises.
● Operating current rises.
● Cooling or heating efficiency drops.
● Moisture in the refrigerant circuit may freeze
and block capillary tubing.
● Water when mixed with the refrigerant and oil