ELGi EG 11, Руководство по эксплуатации и обслуживанию

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Electrical System
The compressor starter is an automatic star–delta starter with safety interlocks
The compressor can be controlled in all modes (Local, Remote and DCS) by the
Neuron II, a dedicated microcontroller. Neuron II has eight digital inputs, three
analogue inputs and eight relay outputs. The inputs are provided by contact switches,
pressure and temperature transducers. Neuron Il control panel has eight tactile push-
buttons, a 16x2 line alphanumeric LCD for display of compressor status and related
information, and 14 LEDs (Annunciation Window) for user interface. If all the inputs
are normal, the display indicates
“READY”
To start the compressor, press the “START” (green) push - button located on the controller. The controller will switch on the
relays in the correct order, and these in turn will energize the delta contactor and the solenoid valve. The LCD display will show
the current status of the compressor. The compressor runs and builds up pressure
To stop the compressor, press the STOP (red) push - button.If the machine trips due to a fault,press the Reset button after
rectification the fault.
Preprogrammed timer functions
N N
Star-delta delay -determines the star-to-delta changeover time; set at any value between 6 and 10 seconds
N N
Delta-to-run (DTR) delay-decides the delay between the delta change over and energizing of the solenoid valve
N N
Standby time (unload monitoring time)-stops the compressor if it is running in unloaded condition for a set time (5 minutes)
and starts the compressor automatically on demand
Separator element Warning
Indicates that the separator element needs to be replaced. The compressor does not shut down automatically in this situation.
Oil Filter Warning
Indicates that the oil filter element needs to be replaced. The compressor does not shut down automatically in this situation.
High Temperature Discharge
The compressor shuts down automatically and this warning light goes on when the discharge temperature exceeds the preset
value of 230±41
º
F.
Main Motor Overload Trip
This warning lights up and the compressor shuts down when the main motor is overloaded.
Fan Motor Overload Trip
The fan motor has internal thermal over load protection which safe guards the fan motor. If the fan motor trips then DOT will
be high and tripped the compressor as high temperature.
Graphic Warning Display
This gives graphically the location of a fault (condition requiring a Warning)
Reset Button
This button must be pressed before restarting the compressor after it has shut down with a warning and remedial measures
have been taken.
Safety System and Interlocking Devices
Your EG Series compressor is equipped with the following devices for reliability and safety:
Discharge Temperature Sensor
This is provided to shut down the compressor if the discharge air– oil mixture temperature reaches a preset value of 230 o F.
The temperature probe is fitted in Air end.
NOTE :
Ensure 24 V AC power supply to controller. Modify the timer settings under m/c settings menu present in
the controller according to requirement. Before starting the compressor, check the following electrically.
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Operation and Maintenance Manual