13-25-603 Page 25
SECTION 4, CONTROLS & INSTRUMENTATION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
- The Gardner Denver rotary screw compressor package is pre-wired with all
electrical components suitable for the voltage and horsepower at time of order. It is only necessary to
connect the compressor unit to the correct power supply, to the shop air supply network. A standard
single stage compressor package consists of an unitized module that houses a single rotary screw
compressor, oil sump, separation, filtering, and internal injection delivery system, a main drive motor, a
VFD, an oil/air cooling system, Nema 4 electrical enclosure to house VFD on common controller and a
sound-attenuating enclosure. The various control devices employed are described as follows:
Controller
- The compressor package features the AirSmart controller, which integrates all the control
functions under microprocessor control. Controller functions include safety and shutdown, compressor
regulation, operator control and advisory/maintenance indicators. The keypad and display provides a
logical and easily operated control of the compressor and indication of its condition. The controller is
factory adjusted for the compressor package, but allows tuning for specific applications.
NOTICE
Read the Operator’s Manual before operating the compressor. It is critical that
the detailed instructions for the controller, found in the controller manual 13-17-
600, are read and understood. Once the appropriate parameters have been
selected for the controller, compressor operation may commence. For your
convenience, a “Quick Start” excerpt from the controller manual is shown in
Section 3.
Press the red “STOP/RESET” button to clear any conditions (e.g., “Loss of Power” when electrical system
was energized) and start the unit by pushing the green “START” button. Since the unit is equipped with a
minimum pressure (60 psig, 4.1 bar) valve, no special procedure to maintain minimum reservoir pressure
is required.
Main VFD and Motor
– The compressor is driven by an inverter-duty electric motor, which in turn is
energized by a pulse-width modulated, variable frequency drive (commonly referred to as VFD). This
combination of components enables the compressor package to match the supply of compressed air
(e.g., flow capacity) to meet the customer’s demand in real time and in a step-less fashion. The
operational logic which governs the drive and motor-combination is supplied by the AirSmart controller
and it is based on the following basic rules:
•
The speed of the compressor is modulated (e.g., increased or decreased) until the desired system
discharge pressure is achieved.
The drive shares a common Nema 4 protected enclosure with the AirSmart controller and assorted
electrical hardware. Ventilation for the electronics is supplied forced air delivered by the heat exchanger
cooling fan. The heat sink extends out the back of the control box. The drive is installed with gasketing to
keep the Nema 4 rating on the control box. The motor is built with a TEFC protected frame and mounted
directly to the package base – the compressor is pivoted on one axis to provide adjustability for the power
transmitting V-belts. The drive includes adequate current overload protection for its companion motor.
Содержание APEXVS7-11A
Страница 11: ...13 25 603 Page 10 Figure 1 2 COMPRESSOR ILLUSTRATION 303ELA797 B Ref Drawing Page 1 of 2...
Страница 12: ...13 25 603 Page 11 Figure 1 3 COMPRESSOR ILLUSTRATION TANK MOUNTED 303ELA797 B Ref Drawing Page 2 of 2...
Страница 30: ...13 25 603 Page 29 Figure 4 3 CONTROL SCHEMATIC 300ELA797 A Ref Drawing...
Страница 37: ...13 25 603 Page 36 Figure 4 6 WIRING DIAGRAM VARIABLE SPEED 200V 230V 460V 302ELA546 B Ref Drawing Page 1 of 4...
Страница 38: ...13 25 603 Page 37 302ELA546 B Ref Drawing Page 2 of 4...
Страница 39: ...13 25 603 Page 38 302ELA546 B Ref Drawing Page 3 of 4...
Страница 40: ...13 25 603 Page 39 302ELA546 B Ref Drawing Page 4 of 4...
Страница 41: ...13 25 603 Page 40 Figure 4 7 WIRING DIAGRAM VARIABLE SPEED 575V 306ELA546 A Ref Drawing Page 1 of 4...
Страница 42: ...13 25 603 Page 41 306ELA546 A Ref Drawing Page 2 of 4...
Страница 43: ...13 25 603 Page 42 306ELA546 A Ref Drawing Page 3 of 4...
Страница 44: ...13 25 603 Page 43 306ELA546 A Ref Drawing Page 4 of 4...
Страница 70: ......