Ingersoll Rand UP6 15 Manual Del Usuario página 12

10
INTELLISYS OPTION
27 POWER L.E.D.
This will illuminate when the 8V controller supply is available.
28 AUTOMATIC RESTART L.E.D.
This will illuminate when the machine has shutdown due to low air
demand. The compressor will restart and load automatically as soon
as the demand for air resumes.
DISPLAY MESSAGES
When the compressor is running normally, the display will indicate
the package discharge pressure and illuminate the corresponding
L.E.D. [1]. An arrow will also appear in the far right of the display
indicating pressure band selection. Pressing display select [19] will
change the display value and the corresponding L.E.D. will illuminate.
The controller monitors all aspects of the compressor while running and
will display warnings or in severe conditions execute an emergency
stop and display alarm conditions.
MACHINE CONTROL MODES
CAPACITY CONTROL
The compressor is designed to work with two types of capacity
control, to suit the individual plant requirements. These controls are:–
A. On line – Off line. (Fitted as standard)
B. On line – Off line, with Upper Range Modulation. (Optional extra)
Either is available by selection at the control panel.
ON LINE – OFF LINE CONTROL
For applications that require a widely varying air demand, this
mode of control will deliver air at full capacity or zero capacity with
low receiver pressure.
This mode of operation is controlled by the pressure transducer
responding to changes in plant air pressure. This sensor energizes
the load solenoid valve which in turn operates the venting valve
(blowdown) and the closing of the atmospheric vent opening in the
air inlet valve.
The compressor then delivers full capacity air to the plant
system. If the air pressure in this system rises to the upper set point
of the pressure setting, the load solenoid valve is de–energized
allowing the inlet valve to close. At the same time, the venting valve
opens allowing the receiver pressure to drop.
The pressure setting has a range of 12 psi (0.83 bar) between
its upper and lower set points.The upper set point is set at 3 psi (0.2
bar) above the compressor rated discharge pressure.
UPPER RANGE MODULATION CONTROL (Optional Extra)
For plants having a relatively high and constant air demand,
Upper Range Modulation is the recommended mode of control.
Upper range modulation retains the features of On line – Off line
control but provides the throttling of the inlet air flow as the line
pressure rises to the upper set point of the off–line pressure setting.
By bleeding off a small amount from the regulator valve, which
energises the Modulate Solenoid Valve, a reduction in the air signal
to the pneumatic cylinder on the inlet valve allows the cylinder to
'trim' the inlet valve position as dictated by changing line pressure.
Modulation begins when the compressor reaches about 94% of the
rated line pressure and is factory set to modulate down to
approximately 70% of rated capacity.
If the air demand decreases to a level below the 70% modulated
output, the line pressure will increase slightly to the upper limit of the
pressure setting, when the compressor then changes to the Off line
control position and operates with the receiver vented.
UP6 15, UP6 20, UP6 25, UP6 30
AUTOMATIC START/STOP
For plants that have a widely varying plant air demand, larger air
storage capacity, and/or want automatically available stand–by air
capacity, Automatic Start–Stop Control Option is available.
During periods of low demand, if the line pressure rises to the off line
air pressure set point of the lntellisys® , a timer is energized and begins
to time out. The automatic restart time is adjustable in a 2–60 minute
range. The timer will continue to operate as long as the plant line
pressure remains above the on line set point of the Intellisys® . If the
timer continues to operate for as long as its adjusted time setting, a
contact in the lntellisys opens to de–energize the compressor starter
coils. At the same time, a yellow Automatic Restart light on the
lntellisys® panel is lit and the message AUTO RESTART will be
displayed to indicate the compressor has shut down automatically and
will restart automatically.
The automatic restart will take place when the line pressure drops
to the online set point of the Intellisys® .
To operate in the automatic start/stop mode, proceed with the
following steps:
1. Press the SET button until the message AUTO S/S OFF is
displayed.
2. Push the up or down arrows to select the auto start/stop function (on
or off). AUTO S/S OFF in the display indicates auto start/stop is
disabled (off). AUTO S/S ON in the display indicates auto start/stop is
enabled (on). Press the SET button to store function. The display will
flash to acknowledge and then display AUTO S/S 10 MIN.
3. Press the up or down arrows to select the desired automatic restart
time (2–60 min. range). The default value is 10 minutes. Press SET
button to store the value.The display will flash to acknowledge. Press
the DISPLAY SELECT button or wait 30 seconds for the controller to
automatically exit the set routine.The display returns to READY TO
START.
4. Start the compressor and adjust the isolation valve to allow the unit
to slowly reach the offline pressure and unload.The compressor should
run for a minimum of 10 min. and unloaded for the pre–set time and then
shut down.
5. The compressor should restart automatically when the system air
pressure drops below the online air pressure setting.
CONTROLLER WARNING MESSAGES
In the event of a warning, the controller will display a message and
the alarm L.E.D. [10] will flash. The warning message will alternate with
the normal display every 4 seconds, the compressor will continue to run
but the fault should be rectified as soon as possible. The arrow keys
[23] should be used to index the display for any additional warning
messages. A warning message may be reset by depressing set [21]
once.
NOTE:
The warning will recur if the fault has not been rectified. The
following warning messages may be displayed:
SEPARATOR ELEMENT
The separator element is dirty or blocked and should be replaced.
AIREND TEMPERATURE
The airend temperature reaches 97% of the high airend
temperature set point (i.e. 223 F (106 C)).
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