Installation
Waukesha Cherry-Burrell
Page 14
95-03057
11/2012
Refrigeration Piping
Installation
Analyze plant refrigeration load capacity thoroughly. The system
must be sized to adequately support the additional capacity of
this cylinder. All pipes must be clean and free of oil, chips and
sealant residue. Excessive residue in plant piping can foul and
clog cylinder refrigeration valves and components, causing costly
delays in start-up. Refer to appropriate piping schematic in this
manual for Liquid Overfeed (LOF) or Gravity Refrigeration
System.
WARNING:
Ammonia or Freon
lines should be installed by fully
trained and qualified Refrigeration
Piping Specialists.
Liquid Line Installation
The liquid line should be installed to provide a constant and
steady flow of liquid. Check with system requirements and plant
capacities to ensure that refrigeration piping is sized properly.
Suction Line Installation
All Votator II refrigeration units operate best when provided with
constant suction pressure. To ensure constant pressure do the
following:
•
Size suction header for at least 50% above rated capacity of
cylinder.
•
Do not connect to a header already in use by other
equipment with widely varying loads.
CAUTION:
A suction trap or
auxiliary receiver should be
installed in the line to prevent
carry-over back to compressor.
•
Insulate any suction line that passes through a cold room to
prevent condensate formation. Install a trap or auxiliary
receiver in the line.
•
Keep suction pressure at compressor as low as possible.
(Lower pressure allows greater cooling capacity.)
Hot Gas Line (if required)
Review the following guidelines when connecting a hot gas line to
the system:
•
Connection of a hot gas line should be from compressor high
side of line past oil trap or separator to minimize drawing in
oil.
•
DO NOT run line through a cold room or beside a cold
suction line.
•
Slope line away from equipment at 1/8 inch per foot (1 mm
per 100 mm) minimum.
•
Install a strainer or filter in addition to recommended shut-off
valves and pressure gauge.
DANGER:
Never install a shut-off
valve on this line. Never vent or
connect relief line back to suction
line.
Pressure Relief Line
The pressure relief line MUST be exhausted to the outside of the
building.
CAUTION:
The relief valve is
factory set for appropriate
pressure and never needs
adjusting.
Never cap relief line or tie back to suction line.
