Vilter Only Settings; Condenser Control; Oil Pump; Oil Cooling - Emerson Vission 20/20 Operation And Service Manual

Section 19 • Configuration
Discharge Superheat Monitor:
• Enables the discharge superheat safety algorithms.
Discharge superheat monitor works only with R717.
Discharge superheat monitor and suction superheat
monitor features are mutually exclusive.

Vilter Only Settings

Rapid Cycling VFD:
• Enables Rapid Cycling VFD Algorithm for controlling
Compressor VFD Analog Output.

Condenser Control

The set of values in this section enables the condenser
control 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.
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.
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.
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.9
# Pumps:
• Not currently used
Oil Flow Control:
• Enables option for oil fl ow control. Oil fl ow control
will vary analog output for controlling danfoss valve
opening % depending on capacity slide position. Oil
fl ow control output will be regulated only when com-
pressor is running, start condition is over i.e. low oil
pressure timer is elapsed, pumpdown control opera-
tion is not running and oil injection temperature is
above oil injection temperature override setpoint. If
any of the above condition is not satisfi ed, then oil
fl ow analog output will be 4 mA which corresponds
to 100 % valve open.

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.
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.
Remote Oil Cooler:
• Defi nes the compressor oil cooling method as
Remote Oil Cooler. Remote Oil Cooler VFD fan can
be enabled when Auxiliary Output board is installed
and enabled. Rest of the Remote Oil Cooler setpoints
can be defi ned by navigating to Remote Oil Cooler
Screen. Remote Oil Cooler and Condenser Control
feature are mutually exclusive.
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