Figure 6-3. Proportional Band & Setpoint - Emerson Vilter Vission 20/20 Operation And Service Manual

Section 6 • Compressor Control
Pressure safety trip value. This will shut down the com-
pressor and a Reset will be required to restart it.
The auto-cycle function will operate only in local "Auto"
mode and Direct I/O "Remote Auto" mode. If the au-
to-cycle feature is enabled while running in any other
remote mode, the function will simply be ignored.
However, the Minimum slide position will continue to
be respected in Remote "Auto" mode. If the compres-
sor changes from a remote mode back to Local "Auto"
mode, the auto-cycle feature will operate normally.
When the Pump-down Feature is enabled, the Auto-
cycle setpoints are automatically disabled. Pump-
down mode will cause the compressor to cycle off
via the Pump-down Stop Pressure setpoint, and will
not allow the compressor to start again.
Enable:
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.9
NOTE
Figure 6-3. Proportional Band & Setpoint
• Enables the Auto-cycle control. Uncheck the box to
disable the Auto-cycle set-points.
Start Pressure:
• When the suction pressure meets or exceeds this set-
point, the compressor will start.
Start Delay:
• Delays the compressor from starting when the suc-
tion pressure meets or exceeds this setpoint.
Stop Pressure:
• When the suction pressure meets or falls below this
setpoint, the compressor will stop.
Stop Delay:
• Delays the compressor from stopping when the suc-
tion pressure meets or exceeds this setpoint.
Minimum Slide Position:
• The minimum capacity slide position that the com-
pressor is allowed to run at.
6 – 3