Adjustable Control Parameters - Sullair WSPC User Interface Manual

Part 1: User Level
2. Click in the field of the parameter to be changed and delete the current
value. A double-click in the parameter field will highlight the entire value.
When the parameter value is highlighted, typing over the current value will
delete it and replace it with the new value.
3. Type the new value into the selected field.
4. Press "Enter" on the PC keyboard or click the mouse cursor on a different
item. The parameter value will turn red to indicate that the request has
been made.
5. If the request is valid, the new setting will now be active (indicated by the
color change from red to black). If the parameter is invalid or out of range
the color will change to black and the parameter will return to its previous
value.

3.8.2 Adjustable Control Parameters

The following three settings affect the compressor's response to line pressure.
The compressor starts to deliver air to the system whenever pressure falls below
the "Load" pressure and stops delivering air whenever pressure rises above the
"Unload" pressure. "Load delta" is the difference between the two"
(Load Delta) = (Unload pressure) – (Load pressure)
Unload Pressure – Line pressure setpoint (psi, bar, or kpa) at which the
compressor will unload and stop delivering air. When the Unload Pressure is
changed, the Load pressure will usually be held constant, and the Load delta
pressure differential will change automatically.
Load Pressure – Pressure (psi, bar, or kpa) at which the compressor motor will
start and the compressor will begin to deliver air. When the Load Pressure is
changed, the Unload pressure will usually be held constant, and the Load delta
pressure differential will change automatically.
Load Delta – The pressure differential (psi, bar, or kpa) below the unload
pressure at which the machine will begin loading. When the Load delta Pressure
differential is changed, the Unload Pressure will usually be held constant, and the
Load pressure will be adjusted automatically.
VSD Setpoint Pressure – Available only with VSD equipped machines. The
targeted pressure for the variable speed controls. This is normally adjusted near
the bottom of the load/unload band. The speed will be adjusted to maintain this
pressure. Most packages will allow adjustment of this over a wide range to allow
tailoring of the pressure to the needs of the application. Adjustments will be
automatically made to the maximum speed to operate the motor at its full
capacity at any pressure.
Unload Time (seconds) – Set this to the time that the machine is to run
unloaded in Automatic mode before shutting off. This value is displayed in units
of minutes at the WS Controller.
WSPC USER INTERFACE
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