Schreiber Chillers 15MEDAC email - Manual (Page 10)

PRODUCT FEATURES
CONSTRUCTION
The chiller is built on a tubular steel base frame; with a 16 gauge powder coated steel
cabinet. Components are internally mounted on a 16 gauge galvanized steel base. All
of the access panels can be removed without tools. The electrical components are
enclosed in a 2 compartment weather proof enclosure.
REFRIGERATION SYSTEM
The chiller equipped with two 7.5 ton, nominally capacity, compressor/evaporator
modules. Each module has one hermetically sealed scroll compressor, one brazed plate
evaporator (316 SS plates), TEV, filter drier, sight glass and liquid/suction heat
exchanger and safety switches. The compressor has suction and discharge isolation
valves for ease of compressor replacement. Each system has a receiver with isolation
valves to allow the entire refrigerant charge to be pumped into the receiver when
removal of the module if needed. Each module is connected to an independent
condenser circuit. The condenser utilizes two 1-HP 1725 RPM motor with 24-inch
propeller to reject heat. The motor speed is controlled by a variable speed drive (FSD
or VFD) for controlling head pressure.
THE REFRIGERATION SYSTEM USES R-22
Each refrigeration system module is independent. One can be removed from the system
while the other is operating. Caution must be taken as high voltage electricity can
create personal injury and lead to death.
CHILLED WATER SYSTEM
The chiller installed with two identical pumps; they are redundancy pumps. A paddle
type flow switch, mounted on the return line of the chilled water loop, controls the
operation of these pumps. In addition, the pump will rotate it operation on a daily
basis. The default change over time is 23 o’clock. This time can be changed to
customer desire. A single set of chilled water connection is provided at the front of the
chiller
Inside the chiller is a 70-gallon, double wall insulated reservoir. The inner layer is 304
stainless steel and the outer layer is powder coated steel. There is 1” of foam in
between the layers. A 1” overflow (vent), sight glass, and 1” fill fitting is installed on the
main access side of the chiller. There is also a 1 2” drain. Since the reservoir is vented
to atmosphere, a backflow kit is provided to prevent water from flowing out of