Chicago Pneumatic CPVS 20 Technical specifications

CPVS 20 – 30 PRODUCT DESCRIPTION
The CHICAGO PNEUMATIC CPVS 20-30 compressor is a quiet, complete and
ready-for-use unit for the production of compressed air for light and medium
industrial applications.
OVERVIEW
The CHICAGO PNEUMATIC CPVS 20-30 consists of a single-stage screw rotary
compressor with oil injection technology, standard low-sound enclosure, ES3000
microprocessor with VSD operation, totally-enclosed fan-cooled (TEFC) motor with
soft start and reliable belt-drive transmission. Maximum operating pressure is 190
psig. The CHICAGO PNEUMATIC CPVS 20-30 is designed for indoor installation
and carries a standard 1 year warranty. Upon satisfactory commissioning, the
warranty shall be extended to a CP SECURE 5 Year Warranty (see warranty policy
for details).
MAJOR COMPONENTS
1. Dry air suction filter. Before being ingested, the atmospheric air is filtered by a
panel pre-filter placed on the cabinet of the machine. The air is then filtered
again by the 2 micron air filter element at the inlet of the compressor
2. Inlet assembly equipped with intake regulator and solenoid valve for idle or
discharge operation, able to avoid oil backups due to eventual and sudden stops
under load
3. 5 on 6 lobe rotary screw compressor airend that assures:
- Maximum yield and maximum efficiency in any condition of operation
- Low noise level
- Low air losses and/or blow-by
4. Asynchronous, 460V, three-phase electric motor, 2 pole, class F insulation, top-
mounted junction box and TEFC protection which provides resistance to dust,
debris and liquids, increasing motor and compressor life
5. Efficient cooling system with forced ventilation and air flows via dedicated turbine
or axial fan for optimum heat transference to package ambient
6. The drive transmission from the electric motor to the compression unit is
performed by means of V-belts. Multiple belts permit the dissipation of heat,
increasing their longevity and decreasing downtime.
7. Oil filter to hold eventual solid particles in suspension in the oil helping to prevent
contamination into the airend and compressed air.
8. High efficiency air/oil separator element to ensure the best separation of oil from
the compressed air. Separation shall take place through at least three methods,
CPVS 20-30 Product Description

including but not limited to: impact separation, gravitational separation and
centripetal separation. The receiver tank collects and recycles the lubricant for
distribution throughout the fluid circuit. Lubricant carryover with new components
is 3ppm.
9. Integrated air/oil cooling blocks of industrial-grade, treated aluminum with finned
pack for the cooling of application air and lubricating oil before injection into the
compression chamber.
10.Filtering panel for pre-filtration of all the air incoming in the machine.
11.Full cabinet enclosure which is aesthetically pleasing, primed and powder-coated
with UV resistant epoxy paint to a minimum of 2 mils. Cabinet is formed from
varnished steel sheet and lined internally with acoustic insulating material.
12.VACON variable speed drive
xIntegrated line reactor to smooth voltage fluctuations
xAllows continuous duty operation with turndown as low as 20% of full load
capacity while maintaining a pressure band of +/- 2 psig
xProvides soft start capability
oReduces inrush currents
oLowers motor power consumption
ELECTRICAL PANEL
- Electrical control panel in a metallic enclosure with keyed entry in compliance with
the safety standards in force featuring:
xNEMA 1 electromechanical protection
xAutomatic soft start operation
xThermal protection for the electric motor
xSingle-phase safety transformer with protection upstream and downstream by
means of circuit breakers
xPower fail circuitry and ES3000 microprocessor
- Disconnecting switch with two positions:
xAt position “0” allows the opening of the control panel
xAt position “1” allows the starting of the machine
- Identification label indicating the serial number, the model and the identification
data of the compressor
ES3000 CONTROLLER
The CHICAGO PNEUMATIC CPVS 20-30 is managed by the ES3000, an electronic
control unit programmed for energy saving operation with intelligent shut-down.
- Controls all operations related to the use of the compressor: loading, idling, stop
and restart of the compressor
- Performs the control and the regulation of the machine
CPVS 20-30 Product Description

- Signals any eventual malfunction in progress
- Stops the compressor due to alarm in progress
- Displays the information on the machine maintenance program
- Connections for facilitating communications and networking
x8 digital inputs
x4 analogical inputs
x14 digital outputs for field controls
x1 analogical output device
x1 interface port for the eventual enabling of a remote control
x1 serial port for connection to a PC in order to access the programming
functions
xNetworking capability for 6 compressors
oAt least 3 must be equipped with ES3000
oA maximum of 3 can be other microprocessor based controllers
- Display
xUpper display: displays the compressor pressure
xLower display: displays the temperature, the total hours, load hours
xTab to go to the next field of the screen on the display
xButtons on each menu allow programming of the controller
xSeries of green LEDs indicating the normal operation phases of the
compressor
xSeries of yellow LEDs (blinking in the forewarning phase) signaling the
maintenance period time
xSeries of red LEDs (blinking in the prealarm phase) signaling the intervention
of a safety device
xStart, stop, reset, test push buttons and compressor idling LEDs
CPVS 20-30 Product Description

ENERGY SAVINGS DURING UNLOADED OPERATION
The CHICAGO PNEUMATIC CPVS 20-30 does not idle and therefore consumes no
power during unloaded operation.
SAFETY DEVICES
High Pressure Sensor
- This protects the compressor against any abnormal rise in delivery pressure
Safety Valve
- Exhausts air if compressor runs over maximum working pressure
- Protects the compressor and down stream equipment from potential damage
Automatic Blow-Down Valve
- De-pressurizes compressor when compressor stops
- Prevents accidental starting of the compressor under load
Minimum Pressure Valve
- Ensures optimum internal pressure for oil circulation before producing compressed
air
- Prevents potential airend failure and optimum oil separation
Thermostatic Bypass Valve
- Ensures oil reaches optimum temperature before passing through the cooler
- Prevents thermal overload on the main motor during start up on cold days.
Non-Return Valve
- Stops reverse rotation of airend/motor
- Ensures no air/oil mixture exhausts through the air inlet filter on shutdown
High Temperature Thermostat
- Stops the compressor when air/oil temperature exceeds design parameters
- Reduces risk of airend failure
Motor Thermal Overload
Thermal overloads are fitted to both the main and fan motors to prevent burn outs
and expensive rewinds.
CPVS 20-30 Product Description

CONTROL DEVICES
- Minimum pressure check-valve
- Rapid discharge for quick, automatic depressurization system to ensure a reliable
idle restart without foaming the lubricant or damaging components
- Visible oil level via sight glass on the separator tank
- Gauge for the reading of the air-oil separator pressure
- Pressure transducer for the setting and the reading of the operation pressure
- Thermal probe for the control and the reading of the temperature value of the air/oil
mixture delivered to the airend
LUBRICATING SYSTEM
The CHICAGO PNEUMATIC CPVS 20-30 is supplied with an 8,000 synthetic blend
lubricant. Within the compression unit, the air and lubricating oil are mixed together
and sent to the oil/air separation system in order to reduce the oil carryover in
suspension. The oil and the compressed air are separately cooled by means of a
final air and oil cooler. It is kept in constant transit by the pressure difference of the
compressed air circuit, thereby avoiding the use of power consuming oil pumps.
Proper filtration and effective cooling ensure optimal operating conditions for the oil
and grant performance longevity of the compressor. The oil has three main
functions:
- Lubrication of the airend and reduction of frictional losses
- Cooling of the airend by transmitting heat from the compression elements
- To provide a seal between the rotors of the airend
THE LATEST EVOLUTION OF THE ASSYMETRICAL PROFILE AIREND
Combining proven technology with advanced materials and production methods, we
have developed a new airend that sets the standard for efficiency and reliability. The
oil flooded asymmetrical screw type element ensures peak performance with no loss
in efficiency throughout the life of the compression element.
COOLING AIR
Cooling air is drawn in at high level to ensure the minimum amount of dust
contamination enters the package. The inlet baffles optimize the air flow entering in
the unit allow the compressor to be installed next to a wall which lowers the
installation space required and saves on maintenance costs. The baffles also
minimize the velocity of cooling air entering the package which prevents pre-filters air
particulates. A large turbine fan gives the benefits of increased cooling efficiency,
reduced noise levels and reduced power consumption. The aftercooler reduces the
compressed air temperature to approximately 18°F above ambient temperature
where approximately 70% of the water vapor in the air condenses into water droplets
and can be removed via drain or moisture separator. This protects down stream
equipment from water contamination, increasing the reliability of pneumatic
equipment and reducing product contamination.
TEFC MOTOR
The TEFC motor is protected from dust and water which increases the lifespan of the
motor. With superior cooling efficiency from the turbine fan, optimum cooling of the
CPVS 20-30 Product Description