Service manual

24 – 1
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.9
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. Twin Screw Control Screen. Once
selected, another dropdown box labeled “Operation
Type” will appear directly below the “Compressor”
drop-down box. You should also notice that the oil
pump control becomes grayed out because the oil
pump operation is now determined 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