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4-1
SECTION 4
CONTROLS & INSTRUMENTATION
GENERAL DESCRIPTION
The Gardner Denver rotary screw compressor is pre-wired with all controls, motor, and starter for the
voltage and horsepower at the time of ordering. 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, TEAO electric main motor, reduced-voltage
magnetic starter housed in an UL Type 4 (NEMA 4) enclosure / control box, and control components as
described below.
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.
AirSmart
®
G2 Controller
- The compressor package features the AirSmart G2 controller, which
integrates all the control functions under microprocessor control - see Fig 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 Layout and Main Screen
Emergency Stop Pushbutton -
This is a maintained pushbutton, and removes power from the controller
outputs regardless of controller status. It is located on the electrical panel door, below the controller
keypad. This should be used for emergency purposes only - use the keypad [STOP] for normal controlled
stopping.
Control Transformer –
A control transformer is provided to supply 120 VAC input to the power supply. A
secondary fuse is provided on the control transformer. Refer to adjacent labeling for replacement
information.
Fuse Blocks –
Two fuse blocks provide line side protection for the power supply and control transformer.
Three fuse blocks provide line side protection for the cooling fan contactor.
Summary of Contents for AirSmart G2
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