hussman P/N 0387183_D - page 12

BRANCH LINE PIPING
Suction Line – All Defrosts
• 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 in. (76 mm)
diameter).
Liquid Line – 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
1/27/8
5/811/8
7/813/8
11/81
5/8
13/821/8
• Take-offs to evaporators exit the bottom of the
liquid line. Provide an expansion loop for each
evaporator take-off (minimum 3 in. (76 mm)
diameter).
2-2 REFRIGERATION / ELECTRICAL
P/N 0387183_D WWW.HUSSMANN.COM
3-In. Loop (76 mm)
Suction Line Return
Liquid Line Take Off
From
Liquid
Manifold
To
Suction
Manifold
Electric or Offtime Defrost Liquid Line
Koolgas Defrost Liquid Line Two Sizes Larger in Merchandiser
The following information is applicable only
for piping Hussmann merchandisers to
Hussmann refrigeration equipment.
CAUTION
!