Long Lineset Instructions

Page 4
Table 4. Liquid Line Quick Select
UNIT
UNIT
TONS
LINE
SIZE
HCFC-22 HFC-410A
UP TO
25
FEET
50 75 100 125 150 175 200
UP TO
25
FEET
50 75 100 125 150 175 200
012 1
5/16” 25 50 50 50 50 49 47 45 25 50 60 60 60 60 60 60
3/8” 25 50 50 50 50 50 50 50 25 50 60 60 60 60 60 60
018 1.5
5/16” 25 50 48 44 41 37 33 29 25 50 60 60 55 51 46 42
3/8” 25 50 50 50 50 50 50 49 25 50 60 60 60 60 60 60
024 2
5/16” 25 47 41 34 28 21 15 8 25 50 55 48 40 33 25 18
3/8” 25 50 50 50 50 46 44 42 25 50 60 60 60 60 59 57
030 2.5
5/16” 25 45 38 30 23 15 8 NR 25 50 52 43 35 26 17 8
3/8” 25 50 50 46 43 39 36 32 25 50 60 60 58 54 50 46
036 3
3/8” 25 50 46 41 36 32 27 22 25 50 60 56 51 45 39 34
1/2” 25 50 50 50 50 50 50 50 25 50 60 60 60 60 60 60
042 3.5
3/8” 25 47 41 34 28 22 15 9 25 50 56 48 41 33 26 19
1/2” 25 50 50 50 50 50 50 48 25 50 60 60 60 60 60 60
048 4
3/8” 25 44 36 28 20 12 4 NR 25 50 50 41 31 22 13 NR
1/2” 25 50 50 50 50 49 47 45 25 50 60 60 60 60 60 60
060 5
3/8” 25 36 24 12 NR NR NR NR 25 50 36 22 8 NR NR NR
1/2” 25 50 50 49 47 44 41 38 25 50 60 60 60 59 56 53
072 6
1/2” 25 50 49 46 42 38 35 31 25 50 60 60 57 53 49 45
5/8” 25 50 50 50 50 50 50 50 25 50 60 60 60 60 60 60
090 7.5
5/8” 25 50 50 50 50 50 50 48 25 50 60 60 60 60 60 60
3/4” 25 50 50 50 50 50 50 50 25 50 60 60 60 60 60 60
120 10
5/8” 25 50 50 50 47 45 42 40 25 50 60 60 60 60 57 54
3/4” 25 50 50 50 50 50 50 50 25 50 60 60 60 60 60 60
180
(2-COMP)
15
5/8” X 2 25 50 50 50 50 50 50 48 25 50 60 60 60 60 60 60
3/4” X 2 25 50 50 50 50 50 50 50 25 50 60 60 60 60 60 60
240
(2-COMP)
20
5/8” X 2 25 50 50 50 47 45 42 40 25 50 60 60 60 60 57 54
3/4” X 2 25 50 50 50 50 50 50 50 25 50 60 60 60 60 60 60
EXAMPLE 1: LIQUID LINE SIZING
Given: 10-ton, HCFC-22 A/C cooling only condensing unit
on ground level with a 10 ton evaporator on the third level
above ground (40 feet elevation) and a total of 100 feet
(linear) of piping (see figure 1).
10-TON
CONDENSING
UNIT
10-TON
EVAPORATOR
UNIT
67
FEET
3 FEET
40
FEET
Figure 1. Liquid Line Sizing Example
Find: Select liquid line size from table 4.
Solution:
Find the 10-ton unit on the left side. Start with the 5/8” liquid
line size which is the rated liquid line size listed in the
engineering handbook. Read over to 100 feet of linear
length.
50 feet of elevation is allowed for this liquid line size, so this
meets the 40 foot requirement in this installation. If it did not
meet your requirements, you would need to consider a
larger liquid line listed for the 10 ton unit in table 4.