Operating Instructions and Installation
11-25Samsung Electronics
■ Installing the Refrigerant Pipe Work
● Install the refrigerant pipe within the maximum allowable length, difference in height and length of after the first branch pipe.
● The pressure of the R410A is high. Use only rated refrigerant pipe and follow the installation method.
● Use clean refrigerant pipe which there is no harmful ion, oxide, dust, iron content or moisture.
● Use tools and accessories fit on R410A.
1. Electing the Refrigerant Pipe
• Install refrigerant pipe depending on the outdoor unit capacity.
• When total pipe length is more than 90m,the diameter of pipe from the outdoor unit to the first Y-joint has to step up.
• Increase the refrigerant pipe up if the capacity may be reduced due to the length of the refrigerant pipe.
• If you can not get a pipe of ø25.40 in the open market, a pipe of ø28.58 is available instead.
• The total length includes elbows and joints over an allowable equivalent length. Should size up one grade of pipe between the
outdoor unit and the first Y-joint.
• Use the copper pipe of semi-hard(1/2H)when installing the pipe of ø19.05. If you use Soft(O)pipe,the internal pressure is too
low to cause personal injury.
• Use manifold gauge only for R410A to prevent the inflow of foreign substances.
• Use only flare nut supplied with the product.
• Use vacuum pump with check valve to prevent pump oil from flowing backward while the
vacuum pump is stopped.
• Use the vacuum pump that the vacuum induction is available up to 100.7kPa(5Torr,755mmHg).
Manifold gauge
Normal installation Total length is more than 90m
Liquid side Gas side Liquid side Gas side
9.52
9.52
12.70
15.88
19.05
19.05
19.05
22.23
25.40
28.58
31.75
38.10
12.70
12.70
15.88
19.05
22.23
22.23
22.23
25.40
28.58
31.75
38.10
44.50
6.35
8
10
12, 14
16, 18, 20, 22, 24
26, 28, 30, 32, 34
36, 38, 40, 42, 44, 46, 48
Outdoor unit
capacity (HP)
Oil balancing
pipe
Flare nut
Vacuum pump
ø 6.35 (1/4)
ø 9.52 (3/8)
ø12.70 (1/2)
ø15.88 (5/8)
ø19.05 (3/4)
ø22.23 (7/8)
ø 25.40 (1)
ø28.58 (1-1/8)
ø31.75 (1-1/4)
ø38.10 (1-1/2)
ø44.50 (1-5/8)
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
1.1
1.35
1.7
C1220T-O
(Soft)
C1220T-1/2H
(Semi-hard)
Outer diameter
[mm/(inch)]
Minimum thickness
(mm)
Temper grade
Size UP
First Y-joint
✳ Temper grade and minimum thickness of the refrigerant pipe.
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