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33
Figure 17 - Double Discharge Riser
Note: Discharge line sizing shown in Table 8 and Table 9 are listed per circuit and applies where leaving water
temperature (LWT) is 40°F or higher. For applications where LWT is below 40°F, size lines using the ASHRAE Refrigeration
Handbook or other suitable design guide.
Table 8 – Discharge Line Sizes for Chiller (inches OD)
Circuit
Tons
Total Equivalent Length (ft)
25
50
75
100
125
150
175
200
225
250
275
300
10
⅞
⅞
⅞
⅞
⅞
⅞
⅞
1⅛
1⅛
1⅛
1⅛
1⅛
15
⅞
⅞
1⅛
1⅛
1⅛
1⅛
1⅛
1⅛
1⅛
1⅛
1⅜
1⅜
20
⅞
1⅛
1⅛
1⅜
1⅜
1⅜
1⅜
1⅜
1⅜
1⅜
1⅝
1⅝
25
1⅛
1⅛
1⅛
1⅛
1⅜
1⅜
1⅜
1⅜
1⅜
1⅜
1⅝
1⅝
30
1⅛
1⅛
1⅛
1⅜
1⅜
1⅜
1
⅜
1⅜
1⅜
1⅝
1⅝
1⅝
40
1⅝
1⅝
1⅝
1⅝
1⅝
1⅝
2⅛
2⅛
2⅛
2⅛
2⅛
2⅛
50
1⅝
1⅝
1⅝
1⅝
1⅝
2⅛
2⅛
2⅛
2⅛
2⅛
2⅛
2⅛
60
1⅝
1⅝
1⅝
2⅛
2⅛
2⅛
2⅛
2⅛
2⅛
2⅛
2⅛
2⅛
80
1⅝
1⅝
2⅛
2⅛
2⅛
2⅛
2⅛
2⅛
2⅝
2⅝
2⅝
2⅝
A
B
REDUCING
TEE
FROM
CHILLER
PITCH TO
CONDENSER
45 DEGREE
STREET ELBOWS
90 DEGREE
STREET ELBOWS