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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153
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, see Figure 24-1. Twin Screw Control
Screen.
Setup
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”.
Once selected, another dropdown box labeled
“Operation Type” will appear directly below the
“Compressor” drop-down box. You should also no-
tice 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. Twin Screw Control Screen