10. Installation
※ Max. piping length : The equivalent length (ft) of piping from the outdoor unit to the farthest indoor unit
For SI units, allowable length A (m) ≥ max. piping length (m) / { 1 - (vertical piping length (m) * 0.015) }
※ Max. piping length : The equivalent length (m) of piping from the outdoor unit to the farthest indoor unit
※ If the conditions above are satisfied and one-size smaller piping has been installed, set the "liquid pipe (main
pipe) size reduction" option.
•
Length allowed to reduce the diameter of liquid pipe, A (equivalent length)
Refrigerant pipe installation
When all the following conditions are met, install the main liquid pipe that is one step smaller to reduce piping load
and the amount of refrigerant.
Note that the refrigerant for the main liquid pipe must be added by the specified amount upon reduction.
Condition 1: The vertical piping length is less than 131 ft (40m)
Condition 2: For BG un
its
, allowable length A (ft) ≥ max. piping length (ft) / { 1 - (vertical piping length (ft) * 0.0046) }
ĮЇϩʒͱͱθЇ̈͝ϩ
ʀɇΧɇʀ̈ϩц
࣑Ɵͱ࣒͝
đɇӱ͔Ї͔Χ̈Χʪ̷ʪ͝˝ϩ˵ӥϩ˵̈߫͝ߢ͔࣑ߤ߫ߧߥ˙ϩ࣒
đɇӱ͔Ї͔Χ̈Χʪ̷ʪ͝˝ϩ˵ͱЭʪθ߫ߢ͔࣑ߤ߫ߧߥ˙ϩ࣒
ť̈Χʪʒ̈ɇ͔ʪϩʪθ
̷̷ͱиɇɵ̷ʪ̷ʪ͝˝ϩ˵
ť̈Χʪʒ̈ɇ͔ʪϩʪθ
̷̷ͱиɇɵ̷ʪ̷ʪ͝˝ϩ˵
͔͔
̈͝ʀ˵
͔
˙ϩ
͔͔
̈͝ʀ˵
͔
˙ϩ
6
Ɵ˵̈ϑʀɇΧɇʀ̈ϩц̈ϑ͝ͱϩϑЇΧΧͱθϩʪʒ
8
This capacity is not supported.
10
9.52
3/8
50
164
12.7
1/2
200
656
12
9.52
3/8
30
98
12.7
1/2
160
525
14
12.7
1/2
90
295
15.88
5/8
200
656
16
12.7
1/2
90
295
15.88
5/8
200
656
18
12.7
1/2
80
262
15.88
5/8
200
656
20
12.7
1/2
60
197
15.88
5/8
190
623
22
15.88
5/8
90
295
19.05
3/4
200
656
24
15.88
5/8
90
295
19.05
3/4
200
656
26
15.88
5/8
90
295
19.05
3/4
200
656
28
15.88
5/8
90
295
19.05
3/4
200
656
30
15.88
5/8
90
295
19.05
3/4
200
656
32
15.88
5/8
80
262
19.05
3/4
200
656
34
15.88
5/8
70
230
19.05
3/4
200
656
36
15.88
5/8
60
197
19.05
3/4
190
623
38
15.88
5/8
60
197
19.05
3/4
170
558
40
15.88
5/8
50
164
19.05
3/4
150
492
E.g.1 : For a site with 18 tons (BG units), max. piping length of 460ft (395 ft-long horizontal piping and 65ft-long vertical piping) condition,
allowable length A ≥ max. piping length / { 1 - (vertical piping length * 0.0046) }
656ft ≥ 460ft / { 1 - (65 * 0.0046) } = 460ft / 0.701 = 656ft
E.g.2 : For a site with 18 tons (SI units), max. piping length of 140m (120 m-long horizontal piping and 20m-long vertical piping) condition,
allowable length A ≥ max. piping length / { 1 - (vertical piping length * 0.015) }
200m ≥ 140m/ { 1 - (20 * 0.015) } = 140m / 0.7 = 200m
Accordingly, the max. piping length of 140m (120m-long horizontal piping and 20m-long vertical piping) is allowable.
