Instruction Manual DS Series Senator Industrial Air Compressors
2024-10-11 © Glenco Air & Power Pty Ltd 5
possible and (c) maintain sufficient temperature to prevent water vapour in the system from
condensing. The function of the lubricating oil filter is to remove any metal wear particles and
lubricating oil cracking products to minimise wear of the air end bearings and rotors.
2.2.3 Cooling System
Cooling air is drawn from outside the unit by the cooling fan and then blown across the radiator
fins of the oil cooler and air after-cooler (if equipped). Heat exchange takes place between the
cooling air and the hot oil and compressed air streams to achieve a cooling effect. The maximum
ambient air temperature should not exceed 45°C otherwise excessively high compressed air and
oil temperatures will occur; this will shorten the life of the lubricating oil and may activate over-
temperature shutdown of the compressor.
2.2.4 Control Protection System
The compressor has a microprocessor controller that automatically adjusts the operating state
of the unit according to the actual air consumption of the user’s application.
If the air consumption is low or the air application is paused, the inlet valve will close allowing
the compressor to operate with reduced energy consumption in unloading mode. After the air
consumption is recommenced, the controller opens the inlet valve again to enable the
compressor to operate normally in loading mode. The controller always monitors the
compressor when it’s running. If any abnormal condition – such as motor overload or air
discharge over-temperature – is detected, the controller automatically shuts down the
compressor to protect it against damage.
A safety valve is installed in the air-oil receiver. If the pressure inside the receiver exceeds its
design rating, the safety valve will automatically open to quickly discharge the air and reduce
the pressure, thereby ensuring safety of the unit and personnel. The safety valve should not open
during normal operation.
2.2.5 Electrical System
The electrical system consists primarily of the air end motor, fan motor (if equipped), electrical
control cabinet assembly, solenoid valve, temperature sensor, pressure sensor and controller.
To protect the air end and fan motors against overheating damage due to abnormal conditions,
their operating current draws are monitored by the controller. If either motor current exceeds
its allowable value, the compressor controller will perform an immediate shutdown and the
motor overload alarm message will be shown on the controller’s display panel.
Please refer to the separate wiring diagram booklet(s).
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