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 |
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PSI | 115 | 65 | 150 | 1 |
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BAR | 8 | 4.5 | 10.3 | 0.1 |
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KPa | 793 | 45 | 1034 | 1 |
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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 |
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PSI | +10 | +5 | +10 | 1 |
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BAR | +0.7 | +0.3 | +0.7 | 0.1 |
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KPa | +69 | +34 | +69 | 1 |
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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:
SSet Time.
SSet Date.
SPORO.
SPORO Time.
SRemote Control.
SModbus.
SModbus Address.
SModbus Baud Rate.
SEnergy Rate.
SUnits of Measure [A−PSI, B−Bar/kPa].
SLanguage [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.
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