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13-21-615 v01 Page 33
SECTION 4
CONTROLS & INSTRUMENTATION
GENERAL DESCRIPTION
The Gardner Denver rotary screw compressor is pre-wired with all controls, motor and starter to match
specific voltage and horsepower as ordered. It is necessary only to connect the compressor unit to the
correct power supply and to the shop air line. A standard package unit consists of the modular compressor
assembly, air/oil cooling and filtration system, control components, electric motor drive, associated starting
module, sound attenuation metal enclosure and common support steel base.
ELECTRONIC CONTROLLER AND STARTER ASSEMBLY HARDWARE - See to the Wiring Diagrams listed
[by voltage] at the end of this section, for more details on the location of the referred hardware.
Governor Controller
- The compressor package features the Governor Controller, which integrates all the
control functions under microprocessor control, see Figure 4-1 for general detail of the controller keypad and
display. 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.
Figure 4-1 CONTROLLER KEYPAD
1. Touchscreen Display
2. Start push-button [ I ]
3. Stop push-button [ O ]
4. Emergency Stop
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