Samsung Max Heat DVM S2 Technical Data Book page 58

10. Installation
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 units, allowable length A (ft) ≥ max. piping length (ft) / { 1 - (vertical piping length (ft) * 0.0046) }
※ 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)
6
8
10 9.52
12 9.52
14 12.7
16 12.7
18 12.7
20 12.7
22 15.88
24 15.88
26 15.88
28 15.88
30 15.88
32 15.88
34 15.88
36 15.88
38 15.88
40 15.88
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. pi p i n g length / { 1 - (verti c al pi p i n g 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. pi p i n g length / { 1 - (verti c al pi p i n g 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.
This capacity is not supported.
3/8 50
3/8 30
1/2 90
1/2 90
1/2 80
1/2 60
5/8 90
5/8 90
5/8 90
5/8 90
5/8 90
5/8 80
5/8 70
5/8 60
5/8 60
5/8 50
164 12.7
98 12.7
295 15.88
295 15.88
262 15.88
197 15.88
295 19.05
295 19.05
295 19.05
295 19.05
295 19.05
262 19.05
230 19.05
197 19.05
197 19.05
164 19.05
1/2 200
1/2 160
5/8 200
5/8 200
5/8 200
5/8 190
3/4 200
3/4 200
3/4 200
3/4 200
3/4 200
3/4 200
3/4 200
3/4 190
3/4 170
3/4 150
656
525
656
656
656
623
656
656
656
656
656
656
656
623
558
492