P/N 428668A
Pressure Drop
Pressure drop can rob the system of capacity. To
keep the pressure drop to a minimum, keep the
refrigerant line run as short as possible using a
minimum number of elbows. Where elbows are
required,
USE LONG RADIUS ELBOWS ONLY
.
INSULATION
The suction and liquid lines should be clamped or
taped together and insulated for a minimum of
30 feet from the merchandiser. Additional insula-
tion for the balance of the liquid and suction lines
is recommended wherever condensation drippage
is objectionable or lines are exposed to ambient
conditions.
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 the case suction line size.
•
Case suction lines
should enter at the
top of the branch
line.
LIQUID LINE
•
May be reduced by one size after one half the
case run load. Do not reduce below the case
liquid line connection size.
•
Take-offs to
case liquid lines
should exit the
bottom of the
branch liquid
line. Provide an
expansion loop
for each evapo-
rator take-off.
(Minimum 3 in.
(76 mm) loop.)
Suction Line Return
Minimum Loop
3-in. (76 mm)
Liquid Line Take Off
Offtime Defrost
Liquid Line
Suction Line
8 Ft Case
(2438 mm)
12 Ft Case
(3658 mm)
8 Ft Case
(2438 mm)
12 Ft Case
(3658 mm)
