Schreiber Chillers 15medWC - Manual (Page 6)

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
Each chiller contains two 5 ton compressor/evaporator modules. Each module has one
hermetically sealed scroll compressor, one brazed plate evaporator (316 SS plates), TEV, filter
drier, and sight glass and liquid/suction heat exchanger. 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 a single, dual circuit condenser.
The condenser utilizes two 1-HP 1140 RPM propellers. The motor speed is controlled by a
variable speed drive (FSD or VFD) to control 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 pumps, one for the cryo-shield compressor and other for the
Gradient Coil Amplifier and Gradient Coil Heat Exchanger. Separate connections for each pump
are provided on the front of the chiller.
Inside the chiller is a 55-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 overhead pipes and overflowing the reservoir. A water
supply and hose should be plumbed to the chiller for filling.
Each pump has a shut off valve between the tank and pump suction, and a bypass ball valve
between the discharge and return to adjust flow. There are discharge pressure gauges for each
pump. A strainer and cleanout valve is installed for each refrigeration system.