LINE SIZING
Sizing of all refrigerant lines is the responsi-
bility of the installing contractor. Refer to
Hussmann Refrigerant Line Sizing, and
SuperPlus Fibertronic™ System Planning
Data documents.
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
OFF-TIME AND ELECTRIC DEFROST
•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.)
KOOLGAS DEFROST
•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
⁄2
7
⁄8
5
⁄8 1
1
⁄8
7
⁄8 1
3
⁄8
1
1
⁄8 1
5
⁄8
1
3
⁄8 2
1
⁄8
• Ta k e - o ffs to evaporators exit the bottom of
the liquid line. Provide an expansion loop for
each evaporator take-off. (Minimum 3 inch
diameter.)
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
Revised August 1, 1996 P/N 340272A
3 - 9
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