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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153
Section 19 • Configuration
Condenser Control
The values in this section enables the condenser con-
trol feature of the Vission 20/20. Once selected the
checkboxes will become available for selection and the
condenser control screen will be available via the menu
screen. Some of the options check boxes in this section
may not be available for selection unless the proper
I/O cards are installed and enabled, see Figure 19-2.
Confi guration Screen - Page 2.
Ambient Sensor:
• Enables the ambient temperature option for the con-
denser control algorithm.
Wetbulb Sensor:
• Enables the wetbulb temperature override option for
the condenser control algorithm.
VFD Fan:
• Enables the VFD output option for the condenser
control algorithm.
Oil Pump
This section defi nes how the Vission 20/20 will control
the oil pump, see Figure 19-2. Confi guration Screen -
Page 2.
No Pump:
• Disables all functions for oil pump control.
Cycling:
• Enables option for cycling oil pump. Oil pump is cy-
cled on and off depending on compressor differential
pressure.
Full Time:
• Enables option for full time oil pump. Oil pump will
always be running while the compressor is running.
# Pumps:
• Not currently used
Oil Cooling
The section defi nes how the Vission 20/20 will monitor
and/or control the temperature of the compressor oil,
see Figure 19-2. Confi guration Screen - Page 2.
Thermosyphon:
• This defi nes the compressor oil cooling method as
thermosyphon.
H20 Oil Cooler:
• This defi nes the compressor oil cooling method as
water heat exchange.
Liquid Injection:
• This defi nes the compressor oil cooling method as
liquid refrigerant injection.
Solenoids:
• Enables the solenoid for liquid injection control.
Motorized Valve:
• Enables the motorized value for liquid injection con-
trolled by PID settings.
Motor Current Device
The Vission 20/20 can read the motor current in a couple
of different ways. The following selections defi nes the
method, see Figure 19-2. Confi guration Screen - Page 2.
Current Transformer:
• This defi nes the input used for motor current when a
current transformer is used.
4-20ma Transformer:
• This defi nes the input used for motor current.