Emerson Vilter Vission 20/20, Operation And Service Manual

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6 – 12
Section 6 • Compressor Control
Vission 20/20 • Operation and Service Manual • Emerson • 35391SC 2.7
Figure 6-12. Compressor Control Screen - (Active Control Mode, Oil Control)
I/O Based Control Mode:
• This checkbox, when enabled, monitors the Remote
Select #1/#2 Digital Input (5th Digital Input on
Digital Input Board 1). When Compressor is running
in Auto / Remote(Auto) run mode, the selection of
Active Control Setpoint depends upon the state of
Remote Select #1/#2 Digital Input. When Remote
Select #1/#2 digital input is Energized, Active Control
Mode will be Setpoint 2. When Remote Select #1/#2
digital input is De-Energized Active Control Mode will
be Setpoint 1.
Oil Control
These setpoints determine how the Vission 20/20 will
manage the compressor’s oil, see Figure 6-12.
Oil Pump Press Restart Ratio:
•
The on and off setpoints define when the oil pump
will cycle on and off if the oil pump is selected to cycle
from the configuration screen.
Oil Separator Heater Temp:
• When the oil temperature falls below this setpoint
the oil heater will turn on. Note, there is a 5°F dif-
ferential associated with this setpoint. For example,
when set at 100°F, the heater will turn on at 95°F and
off at 105°F.Suction Oil Injection Solenoid
DI Board 3: Input 3:
•This label offers flexibility to set name for digital input
3 on digital input board 3. User defined name set here
is reflected in Timers, Input/Output States & Auxiliary
I/O Screens
DI Board 3: Input 4:
•This label offers flexibility to set name for digital input
4 on digital input board 3. User defined name set here
is reflected in Timers, Input/Output States & Auxiliary
I/O Screens
The Vission 20/20 offers the flexibility to control a
SOI Solenoid when Oil Pump is not present. The SOI