Emerson Vission 20/20 Operation And Service Manual page 227

Appendix B • Vission 20/20 Application Procedures
Step 2: Setup and selection of Oil Cooling from
page 2 of the Confi guration screen
The oil cooling VPLUS algorithm must be enabled from
the confi guration screen. The algorithm used for this
is the same one that is used to control the oil cooling
motorized positioning valve. Navigate to page 2 of the
Confi guration screen. In the middle column, towards
the bottom of page 2 are the Oil Cooling selections (ref-
erence Figure 6 below). Select "Liquid Injection" meth-
od and then select the "Motorized Valve" selection.
Note that by selecting the positioning valve algorithm,
Figure B-46. Oil Cooling Selection for VPLUS Oil Cooling
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
the speed of the VPLUS motor is being controlled based
on the discharge temperature only. (The original VPLUS
temperature controller had thermocouples that sensed
both the discharge temperature and the oil injection
temperature and then averaged those two tempera-
tures together, in order to control the speed of the
VPLUS motor.
Continue to step 3.
B - 71