Service manual

24 – 1
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
Section 24 • Twin Screw Control
Overview
The Vission 20/20 is capable of operating a twin screw
compressor from a number of different manufacturers.
The Vission 20/20 currently operates as a twin screw
controller in the full time oil pump and the no oil pump
confi guration.
Setup - Confi guration Screen
Confi guration Screen:
• To setup the Vission 20/20 panel for twin screw, navi-
gate to the Confi guration Screen, page 2, and select
“VRS” from the dropdown box label “Compressor”,
see Figure 24-1. Once selected, another dropdown
box labeled “Operation Type” will appear directly be-
low the “Compressor” drop-down box. You should
also notice that the oil pump control becomes grayed
out because the oil pump operation is now deter-
mined by the type of compressor that is select from
the “Type” drop-down box.
• Standard - Selects the oil pump operation as
“Full Time”.
• Stal - Selects the oil pump control as “No
pump”.
Menu Changes:
• When selecting the twin screw option there will be
other changes that occur in other menu pages.
• Volume position indicator will disappear from
the main screen and right data panel.
• Prelube oil pump alarms and trip values will
be changed to default values for the twin screw
• Run oil pump alarm and trip values will be
changed to default values for the twin screw.
Figure 24-1. Confi guration Screen - Twin Screw Option