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5.5
Refrigerant Piping Work
< Outdoor Unit to First Branch >
Outdoor Unit Capacity
Equivalent Piping Length < 100m Equivalent Piping Length ≥ 100m
34HP
36 to 42HP
< First Branch >
Outdoor Unit
Multi-Kit
Capacity
34 to 42HP
E-302SN
< Piping Size and Multi-kit after First Branch >
Gas/Liquid
Total I. U.
(φmm)
Capacity in HP
36~
38.1/19.05
26~35.99
31.75/19.05
18~25.99
28.6/15.88
16~17.99
28.6/12.7
12~15.99
25.4/12.7
9~11.99
22.2/9.53
6~8.99
19.05/9.53
lower than 6
15.88/9.53
*3)
Total I. U.
Number of
Capacity in HP
Branches
5~10
8 branches
5~8
4 branches
G In the case that the selected multi-kit size is bigger than that of the first branch, use the same size as the first
branch.
G In the case that the selected pipe size after the first branch is bigger than the pipe size before the first branch,
use the same size as before the branch.
G If the pipe length from the O.U. to the first branch is more than 100m, the pipe size must be increased
(refer to *1)).
In this case, the pipe size from the first branch to the second branch should be selected according to the
original pipe size.
12
Table 5.6 Piping System
Gas/Liquid (φmm)
31.75/19.05
38.1/19.05
H1
Indoor
Unit
H2
Indoor
Unit
L3
L2
L1
Multi-kit Model
E-302SN
E-242SN
E-162SN
E-102SN
E-84HSN
*3)
*3)
E-108HSN
Multi-kit
E-108HSN
E-84HSN
38.1/22.2
38.1/22.2
< Multi-kit to Indoor Unit >
Indoor Unit Capacity
0.8 to 1.5HP
2.5 to 5HP
*2): In the case that liquid piping length is longer
Indoor
Indoor
Unit
Unit
L3
L3
Item
Ref. Pipe Length: L1
Actual
Equivalent
Piping Length from
1st Branch to each I. U.: L2
Piping Length from
each Multi-kit to I. U.: L3
Lift between
O. U. is Higher
I. U. and O. U.: H1
O. U. is Lower
Lift between Indoor Units: H2
Total Actual Length of Liquid Pipes
*1)
Pipe Size
Gas/Liquid
(φmm)
12.7/6.35
2HP
15.88/6.35
15.88/9.53
than 15m, use φ9.53 pipe and reducer
(field-supplied).
Indoor
Unit
Indoor
Unit
L3
L3
Applicable Range
within 150m
within 175m
within 40m
within 30m
within 50m
within 40m
within 15m
within 300m
Max. Length
of Liquid Pipe
*2)
15m
*2)
15m
30m
L3
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