Service manual

B - 7
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
Appendix B • Vission 20/20 Application Procedures
Vission 20/20 Compressor Control
Setpoints Setup
SCOPE
Vission 20/20 programs – version 4550.1 and later
COMPRESSOR SETPOINT #1 AND SETPOINT #2
The Vission 20/20 allows for multiple control setpoints.
This can be utilized for nighttime or weekend setpoint
adjustment in cold storage facilities or when a compres-
sor is being used in a swing application, where it swings
between booster and high stage operation. Setpoint 1
can be setup to operate as a booster compressor and
Setpoint 2 can be setup to operate the compressor to
meet the high stage setpoint.
SETUP
The confi guration screen must fi rst be setup to enable
two setpoints, see Figure B-2.
To enable the two setpoint operation, do the following:
• In the section “Compressor Control”, enter “2” for
each control in the “# Controllers” box.
COMPRESSOR CONTROL SETPOINTS
Navigate to the Compressor Control screen and enter
in the desired control setpoints for both Setpoint 1 and
Setpoint 2.
Log in to set up both Setpoint 1 and Setpoint 2 as shown
in Figure B-3. The load and unloading response of the
compressor for both setpoints can also be changed. This
will be useful when the compressor is operating between
a high stage and booster application.
Set up the “Load Limit” setpoints at different settings
when operating the compressor between a high stage
and booster application as shown in Figure B-4.
Figure B-2. Confi guration Screen (Page 2) - Two Setpoint Operation Setup