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4.
Installation Details
4.1 Wrench torque sheet for installation
Outside diameter
Torque
mm
inch
N.cm
Ф6.35
1/4
1500(153kgf.cm)
Ф9.52
3/8
2500(255kgf.cm)
Ф12.7
1/2
3500(357kgf.cm)
4.2 Connecting the cables
The power cord connection should be
selected according to the following
specifications sheet.
Unit
1 drive 2 type (18K outdoor unit)
1 drive 3 type (27K outdoor unit).
1 drive 4 type (36K outdoor unit)
1 drive 5 type (48K outdoor unit)
For indoor unit and outdoor unit connection
line, 16AWG is ok for all.
4.3 Pipe length and the elevation
Maximum piping length and height difference
1 drive 2
Max. length for all
40
rooms (m)
(131ft)
Max. length for
25 (82ft)
one IU (m)
Max. height
15
difference between
(49.2ft)
IU and OU (m)
Max. height
difference between
10 (33ft)
IUs (m)
Additional refrigerant charge
1 drive 2
Pre-charge pipe
15
length (m)
(49.2ft)
Additiona
g
15 x
l
(length
refrigeran
for all
t charge
rooms -
15)
oz
0.161
x(length
for all
rooms –
49.2)
Caution:
Additional tightening torque
N.cm
1600(163kgf.cm)
2600(265kgf.cm)
3600(367kgf.cm)
AWG
14
14
12
10
1 drive 3
1 drive 4
1 drive 5
60
80
80
(197ft)
(262ft)
(262ft)
35
35
30 (98ft)
(115ft)
(115ft)
15
15
15
(49.2ft)
(49.2ft)
(49.2ft)
10 (33ft)
10 (33ft)
10 (33ft)
1 drive 3
1 drive 4
1 drive 5
22.5
30
37.5
(73.8ft)
(98.4ft)
(123ft)
15 x
15 x
15 x
(length
(length
(length
for all
for all
for all
rooms –
rooms -
rooms –
22.5)
30)
37.5)
(0.161
0.161x(le
.0.161x(le
x(length
ngth for
ngth for
for all
all rooms
all rooms
rooms –
– 98.4)
–123)
73.8)
● Refrigerant
pipe
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
Pipe diameter
Model
(mm/inch)
Liquid
9K
Gas
Liquid
12K 18K
Gas
Liquid
24K
Gas
Outdoor unit union diameter (mm/inch)
1 drive 2
1 drive 3
1 drive 4
1 drive 5
4.4 First-Time Installation
Air and moisture in the refrigerant system cause
the following problems:
● Increases in system pressure
● Increases in operating current
● Decreases in cooling and heating efficiency
● Blocks in capillary piping caused by moisture
in the refrigerant circuit freezing
● Corrosion of parts in the refrigerant system
caused by water
The indoor units and the pipes between
indoor and outdoor units must be tested for
leakages and evacuated to remove gas and
moisture from the system.
Gas leak check with soap water:
Apply soap water or a liquid neutral
detergent on the connections with a soft brush to
check for leakage in the pipe connecting points. If
bubbles emerge, the pipes are leaking.
1. Air Purging Using the Vacuum Pump
11
diameter
is
different
Extension pipe diameter
(mm/inch)
6.35(1/4)
Liquid
6.35(1/4)
9.52(3/8)
Gas
9.52(3/8)
6.35(1/4)
Liquid
6.35(1/4)
12.7(1/2)
Gas
12.7(1/2)
9.52 (3/8)
Liquid
9.52 (3/8)
15.9(5/8)
Gas
15.9(5/8)
Liquid
6.35(1/4)
Gas
9.52(3/8)
Liquid
6.35(1/4)
Gas
9.52(3/8)
Liquid
6.35(1/4)
9.52(3/8)
Gas
12.7(1/2)
Liquid
6.35(1/4)
9.52(3/8)
Gas
12.7(1/2)
*2
*2
*3
*3
*4
*3
*
1
*5
*3
*
2
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