PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
31
ENGLISH
Refrigerant pipe diameter from outdoor unit to first branch. (A)
Upward Out-
door unit
total capacity
Standard Pipe Diameter
Increased Pipe Diameter
When pipe length is 90m(295ft)
or more from ODU to 1st branch
When level difference is
50m(164ft) or more
Ton
HP
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
6
8
Ø 9.52(3/8)
Ø 19.05(3/4)
Ø 12.7(1/2)
Ø 22.2(7/8)
Ø 12.7(1/2)
not increased
8
10
Ø 9.52(3/8)
Ø 22.2(7/8)
Ø 12.7(1/2)
Ø 25.4(1)
Ø 12.7(1/2)
not increased
10~12 12~14
Ø 12.7(1/2)
Ø 28.58(1-1/8) Ø 15.88(5/8)
not increased
Ø 15.88(5/8)
not increased
14~18 18~22 Ø 15.88(5/8) Ø 28.58(1-1/8) Ø 19.05(3/4)
Ø 31.8(1-1/4)
Ø 19.05(3/4)
not increased
20
24
Ø 15.88(5/8)
Ø 34.9(1-3/8)
Ø 19.05(3/4)
not increased
Ø 19.05(3/4)
not increased
22~28 26~34 Ø 19.05(3/4)
Ø 34.9(1-3/8)
Ø 22.2(7/8)
Ø 38.1(1-1/2)
Ø 22.2(7/8)
not increased
30
36
Ø 19.05(3/4)
Ø 41.3(1-5/8)
Ø 22.2(7/8)
not increased
Ø 22.2(7/8)
not increased
Header Method
1 Outdoor Unit
Example : 6 Indoor Units connected
Ⓐ
: Outdoor Unit
Ⓑ
: 1st branch
Ⓒ
: Indoor Units
Ⓓ
: Sealed piping
2 Outdoor Units
Example : 6 Indoor Units connected
Ⓐ
: Outdoor Unit
Ⓑ
: Header branch
Ⓒ
: Indoor Units
Ⓓ
: Sealing
Ⓔ
: Connection branch pipe between Outdoor
units: ARCNN21
L 200m(656ft)
40m(131ft)
H 110m(36
1ft)
40m(131ft)
10m
(33ft) or
less
H 110m(
36
1ft)
40m(131ft)
L 200m(656ft)
40m(131ft)
Slave
Master
Slave
Master
Slave
Master
ODU Capacity
Master Slave
• If the step up size is not available, you can not select the next higher size available.