14
The Micro Controller used on the CL
compressors is designed to accept three (3)
analog inputs and eight (8) digital inputs.
From these inputs and the logic stored in the
processor, the following functions are
supported:
From Analog Inputs:
• Line Pressure
• Sump Pressure
• Discharge Temperature
The following is provided:
• Constantly monitors and displays
system pressure
• Monitors sump pressure and
displays if selected.
• Monitors discharge temperature and
displays if selected.
• Monitors separator differential
pressure and displays if selected.
• Loads and unloads basic system
pressure (provides indication as to
load/unload).
• Provides over pressure warning and
indication.
• Provides over pressure shutdown
and indication.
• Monitors separator element
differential pressure and gives
indication and warning that service
limit is exceeded (at 15 psi) and
shuts unit down (at 25 psi).
• From temperature digital input,
display will indicate impending high
temperature fault and shut down unit
when fault point is exceeded.
From Digital Inputs:
• High oil filter differential
• High inlet filter differential
• Motor overload protection
• Remote start (field installed)
• Remote stop (field installed)
• Emergency stop
• Spare (capable of interfacing with
sequence panel driven by digital
load/unload signal)
• Metal in oil circuit fault (optional)
The following is provided.
• Indication that air filter needs service
• Indication that oil filter needs service
• Motor overload shutdown and
indication
• Ability to wire to a remote start/stop
location
• Provide an emergency stop circuit
• Metal in oil fault indication (optional)
Digital outputs are provided as follows:
1. Energize starter contactors (Star + Delta
contactors when Star Delta starters are
used).
2. Load/Unload solenoid valve.
3. Drain solenoid (field connected)
4. Remote alarm (field connected)
The following additional information is
provided by the software.
• Metric or English units (factory set)
• Running hours
• Loaded hours
• Shutdown stop delay timer
• High temperature alarm
The following information is set by service
personnel at time of oil and filter service:
• Service hours oil
• Service hours filters (service
personnel will set service hours and
processor will count down to preset
interval)
User Variable Parameters:
• Load/Unload Pressure
• Auto restart delay (if set at “0” will
not allow unit to automatically restart
after power failure; however, a value
provided will actuate restart after
power failure in the time in seconds
provided).
• Off delay timer
• Drain cycle timer
Dwell time
Spit time
OPERATION
At power-up, if all operating parameters are
normal, the display will read “READY”.
SECTION II
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