5.0SYSTEMS
5.1GENERAL SYSTEM INFORMATION
The SSR compressor is an electric motor driven, single stage, screw
A standard compressor is composed of the following:
■Inlet air filtration
■Compressor and motor assembly
■Pressurized coolant system with cooler
■Separation system
■Capacity control system with stepper motor inlet
■Motor starting control system
■Instrumentation
■Safety provisions
■Aftercooler
■Moisture separator and drain trap.
Optional accessories can provide for such things as automatic starting and stopping, remote starting or stopping, and sequencer.
The motor, airend, separator tank, and piping are mounted on independent supports. The supports are isolated from the base by rubber isolation mounts. Flexible hoses are utilized on the separator tank coolant out and air discharge to isolate the motor/airend/tank.
5.2 AIR COOLED COMPRESSORS
DESIGN TEMPERATURES
The standard compressor is designed for operation in an ambient range of 35°F to 115°F (1.7°C to 46°C). When conditions other than the design levels described are encountered, we recommend you contact your nearest
The standard maximum temperature 115°F (46°C) is applicable up to an elevation of 3300 ft (1000 m) above sea level. Above this altitude, significant reductions in ambient temperature are required if a standard drive motor is to be used.
COOLANT COOLER
The cooler is an integral assembly of core, fan and
COOLING FAN MOTOR
In a standard compressor, the cooling fan motor is wired at the factory. It is a
AFTERCOOLER
The discharge air aftercooling system consists of a heat exchanger (located at the cooling air entrance of the machine), a condensate separator, and an automatic drain trap.
By cooling the discharge air, much of the water vapor naturally contained in the air is condensed and eliminated from the downstream
5.3 COOLANT SYSTEM
Coolant is forced by pressure from the receiver/separator sump to the inlet port of the coolant cooler and the bypass port of the thermostatic control valve.
The thermostatic control valve controls the quantity of coolant necessary to provide a suitable compressor injection temperature. When the compressor starts cold, part of the coolant will bypass the cooler. As the system temperature rises above the valve setting, the coolant will be directed to the cooler. During periods of operation in higher ambient temperatures, all the coolant flow will be directed through the cooler.
The compressor injection minimum temperature is controlled to preclude the possibility of water vapor condensing in the receiver. By injecting coolant at a sufficiently high temperature, temperature of the discharge air and lubricant mixture will be kept above the dew point.
The controlled temperature coolant passes through a filter to the airend under constant pressure.
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