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OPERATING INSTRUCTIONS
31
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Change a value by highlighting the item and its value and pressing the
SELECT button to highlight just the value. When the value line is
highlighted by itself, the value can be adjusted using the up and down
arrow keys. The CANCEL and SET keys appear at this time. Press the
SET button to enter the new value or press the CANCEL button to
return the value of the setpoint prior to using the arrows. The displayed
value will flash twice to indicate that it has been entered into the setpoint
and the pair of setpoint item and value display lines will again be
highlighted together.
If no keys are pressed within 30 seconds, the SETUP screen will be
exited without making any changes and the display will revert back to
the default Status Display screen.
TARGET PRESSURE
The compressor will try to operate at this pressure setting. The target
pressure ranges and step sizes for each unit of measure are listed in
the table below.
Unit Default Min. Max. Step
PSI 115 65 150 1
BAR 8 4.5 10.3 0.1
KPa 793 45 1034 1
AUTO STOP PRESSURE
The compressor will stop once the system pressure rises to this
pressure and the compressor is operating at the minimum speed. This
auto stop pressure is a function of the target pressure and is indicated
as the auto stop pressure plus an incremental value (e.g., 8 psi above
the target pressure). The auto stop pressure ranges and step sizes for
each unit of measure are listed in the table below.
Unit Default Min. Max. Step
PSI +10 +5 +10 1
BAR +0.7 +0.3 +0.7 0.1
KPa +69 +34 +69 1
VFD/FIXED MODE
The unit can be set to run in VFD mode or Fixed speed mode. When
the unit is running in VFD mode, the unit will run at its maximum
allowable speed until the discharge pressure reaches the Target
Pressure. Once the target pressure has been reached, the unit will
regulate the compressor speed in order to maintain the discharge
pressure at the target pressure setpoint. The compressor will stop if the
discharge pressure reaches the automatic stop pressure setpoint. If
the compressor stops for this reason, it will automatically restart when
the system pressure falls below the target pressure. This mode of
operation is called ”Stopped in Auto Restart”.
If the unit has been set to run in Fixed Speed mode, the unit will run at
its maximum allowable speed until the discharge pressure reaches the
Automatic stop pressure. The compressor will stop if the discharge
pressure reaches the automatic stop pressure setpoint. If the
compressor stops for this reason, it will automatically restart when the
system pressure falls below the Target pressure.
VFD mode is the default mode of operation.
SCHEDULED START/STOP
Scheduled start/stop is an auto start/stop mode of operation based on
the current time. A Scheduled Start Time is used to automatically start
the compressor when the current time equals the Scheduled Start Time
entered for the setpoint. A scheduled Stop time is used to automatically
stop the compressor when the current time equals the Scheduled Stop
time entered for the setpoint.
SCHEDULED START TIME
This is the Scheduled Start Time entry used for the Scheduled Start of
the compressor. When the Scheduled Start/Stop mode is turned on,
the current time equals this setpoint entry, and the compressor is not
currently running, the compressor will automatically start. This setpoint
is user adjustable by selecting the time value using the Left and Right
arrow keys and scrolling to the desired value using the Up and Down
Arrow keys.
SCHEDULED STOP TIME
This is the Scheduled Stop Time entry used for the Schedule Stop of
the compressor. When the Scheduled Start/Stop mode is turned on,
and the current time equals the setpoint entry, and the compressor is
currently running, the compressor will automatically stop. This setpoint
is user adjustable by selecting the time value using the Left and Right
arrow keys and scrolling to the desired value using the Up and Down
Arrow keys.
ENERGY SAVINGS RESET
This will reset the Energy Savings stored and display values to 0 and
will begin calculating and storing new values from this point forward.
This will not reset the Lifetime Energy Savings display.
MENU SCREEN
The MENU screen can be accessed by pressing the MENU button
below the display screen.
The MENU screen is the point from which additional advanced
compressor package setpoints, i.e., user−adjustable variables in the
controller logic, can be accessed.
The name and value of each of the setpoints listed can be seen on the
screen by moving the list up and down using the arrow keys.
The MENU parameter list is as follows:
S Set Time.
S Set Date.
S PORO.
S PORO Time.
S Remote Control.
S Modbus.
S Modbus Address.
S Modbus Baud Rate.
S Energy Rate.
S Units of Measure [A−PSI, B−Bar/kPa].
S Language [A−English, C−all others].
Set Time
This parameter is used to adjust the internal clock to the proper time.
This parameter is user adjustable by selecting the time value using the
Left and Right arrow keys and scrolling to the desired value using the
Up and Down Arrow keys.
Set Date
This parameter is used to adjust the internal clock to the proper date.
This parameter is user adjustable by selecting the date value using the
Left and Right arrow keys and scrolling to the desired value using the
Up and Down Arrow keys.
PORO
This parameter is used to adjust PORO times.
Modbus
This parameter is used to turn on and off the Modbus access through
the serial port.