LINE SIZING
Sizing of all refrigerant lines is the responsibility
of the installing contractor. Refer to
Hussmann
Refrigerant Line Sizing.
BRANCH LINE PIPING
Suction Line
•Pitch in direction of flow.
•May be reduced by one size at one third of case
run load and again after the second third. Do not
reduce below evaporator connection size.
•Suction returns from evaporators enter at the top
of the branch line.
Liquid Line
O
FF
-
TIME AND
E
LECTRIC
D
EFROST
•May be reduced by one size after one half the
case load run. Do not reduce below evaporator
connection size.
•
Take-offs to evaporators exit the bottom of the
liquid line.
Provide an expansion loop for each
evaporator take-off. (Minimum 3 inch diameter.)
K
OOLGAS
D
EFROST
•Maximum of 6 evaporators per Branch System.
•Increase the liquid line size inside the case by
two sizes over the branch size.
Branch Size
In Case Size
1
¼
2
7
¼
8
5
¼
8
1
1
¼
8
7
¼
8
1
3
¼
8
1
1
¼
8
1
5
¼
8
1
3
¼
8
2
1
¼
8
•Take-offs to evaporators exit the bottom of the
liquid line. Provide an expansion loop for each
evaporator take-off. (Minimum 3 inch diameter.)
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
COMPONENT PIPING
September 1, 1997
3 - 8
3-Inch Loop
Suction Line Return
From
Liquid
Manifold
To
Suction
Manifold
Electric or Offtime Defrost Liquid Line
Koolgas Defrost Liquid Line Two Sizes Larger in Merchandiser
Figure 3-12 — Branch Piping
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