Emerson 20/20- Manuals

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 TOC - 8 How to Use This Manual This manual contains instructions for the Vission 20/20 Operation & Service Manual. It has been divided into 25 sections. Section 1: Operational Flow ChartsSection 2: Installation Recom...

1 – 1 Figure 1-1. Operational Flow Charts (1 of 2) Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 1 • Operational Flow Charts Volume and Capacity slides are less than 5% Oil Separator Temp >Oil Sep Start Trip Setpt Filter Diff Press < Start Filter Diff ...

2 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 2 • Installation Recommendations Proper Wiring Sizing • Always size wire gauges as speci fi ed by the National Electrical Code (NEC) for electronic control devices. • For improved noise immunity, install on...

2 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 2 • Installation Recommendations Grounding • Continuous grounds must be run from the util- ity ground to the Vission 20/20, see Figure 2-3. Grounding. • Grounds must be copper or aluminum wire.• Never use c...

2 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Figure 2-5. Correct Transformer Wiring Method Wiring Methods • Each Vission 20/20 panel should have its own indi- vidual control transformer, see Figure 2-5. Correct Transformer Wiring Method and Figure 2-6. Incorr...

2 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Best Practices • Do: • Keep AC wires away from circuit boards.• Always run conduit into the bottom or sides of an enclosure.• If the conduit must be placed in the top of an enclosure, use a water-tight conduit fi t...

3 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 3 • Hardware Architecture Overview The Vission 20/20 control panel utilizes X-86 PC technol-ogy with a Linux operating system. For hardware archi-tecture, see Figure 3-1 Hardware Architecture Overview.The V...

3 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Digital Input/Output (I/O) Refer to Table 2-1. Digital I/O. Compressor Start Output:• When the Vission 20/20 signals the compressor to start, this output is energized. When the Vission 20/20 signals the compressor ...

3 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 High Level Shutdown Input:• This input must be energized in order for the com- pressor to operate. If de-energized, the compressor will shut down and issue a high level trip. Oil Level Float Switch #1 Input:• Used ...

3 – 8 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Digital Output Boards The digital output board convert signals generated by the Vission 20/20 program into 120Vac signals that can be energize or signal other devices. All the signals are digital in that the only t...

3 – 9 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Digital Input Boards The digital input board convert 120Vdc signals from ex-ternal devices to signal for the Vission 20/20 program. All the signals are digital in that the only two states avail-able or either on or...

3 – 10 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Digital In-Out Boards The digital input - output board convert signals gener-ated by the Vission 20/20 program into 120Vac signals as well as detect external 120Vac inputs to signal the Vission 20/20 program.All t...

3 – 11 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 3 • Hardware Architecture Analog Input Boards The analog input board convert varying DC signals into a signal that can interpreted by the Vission 20/20 pro-gram. The signals are considered analog because t...

3 – 12 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 3 • Hardware Architecture Analog Input Jumper Tables The following tables are used to con fi gure each channel of the analog input board signal type and range desired by the operator, see Table 2-4. Analog...

3 – 14 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Analog Output Boards The Analog Output board convert signals form the Vission 20/20 program into a current ranging from 4mA to 20mA, see Figure 3-7. Analog Output Board Layout. Voltage LEDs:• Marked in the diagram...

4 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 4 • Main Screen Figure 4-2. Top Status Bar Top Status Bar The standard view of the status bar shows three pieces of information. From left to right , the bar shows the con-trol method, the current run mode,...

4 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Figure 4-3. Parameter Bar Parameter Bar The main purpose of the Parameter Bar is to display the common operational parameters that the operator would be most concerned with. It also gives the operator access to cri...

4 – 5 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Bottom Status Bar The bottom status bar gives the operator easy access to some basic functions and information. The functions are available via the four button, see Figure 4-5. Bottom Status Bar. Maintenance Button...

4 – 6 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 4 • Main Screen Splash Screen The splash screen is the dynamic portion of the screen that will change as the operator navigates through the Vission 20/20 panel screen, see Figure 4-6. Splash Screen. The mai...

6 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 6 • Compressor Control Overview The compressor control screen is where an operator can set the majority of the compressor settings. These set-ting de fi ne how the compressor will operate and respond to cha...

6 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 As mentioned in the above paragraph, the distance of the process variable from the control setpoint deter-mines the size of the pulse used to move the capacity slide. This is called the proportional band and is set...

6 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 NOTE VFD installation is not covered in this manual. A VFD that is not properly installed and con fi gured has the potential of causing intermittent and dangerous problems. Please consult your VFD manual. 1 Step VF...

6 – 5 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 This button is active only when compressor is in local Auto mode and Control Mode Con fi gured is Suction Pressure. This button will display “Run” when Pumpdown operation has not started or stopped, while button wi...

7 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Overview The Alarms and Trips screen allows the operator to view and adjust settings for compressor safety and alarm set-tings, see Figure 7-1. Alarms and Trips Screen. Vission 20/20 uses Alarms as a way to notify ...

7 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Compressor Inhibits The Vission 20/20 uses several start inhibits to prevent the compressor from starting to protect the compres-sor and the refrigeration system. While starting the compressor, the inhibits are che...

8 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Overview The timers screen allows the operator to view and adjust timer settings associated with compressor operation. There are different types of timers that the operator should be aware of listed below, see Figu...

9 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 as “Unscheduled” if operator does not want to use all 4 events per day. Time:• This setpoint allows selection of Hours, Minutes and AM/PM values for an event. When time set for an event is achieved, control mode wi...

10 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 10 • Compressor Sequencing Overview Compressor sequencing screen is where more than one Vission 20/20 panels can be sequenced in network using Modbus TCP. These settings de fi ne how the master com- presso...

11 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 11 • Condenser Control Overview This screen allows the operator to view and adjust con-denser setpoint settings associated with condenser op-eration. This screen will only be active if the Condenser Contro...

11 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Condenser Press:• This is the read only parameter and it displays the present value of condenser pressure. Condenser Setpoint:• This is the condenser pressure setpoint that needs to be maintained. Upper Deadband:•...

11 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Figure 11-2. Step Control Screen Section 11 • Condenser Control selected as Low Speed Fan through combo box. E.g.: Let’s say Out #2 is selected as Low Speed Fan in Step 2. When step 2 becomes active during condens...

12 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 12 • Service Options Overview The Service Option screen allows the operator the abil-ity to force individual digital or analog outputs ON. This feature is used for diagnostic purposes during initial setup ...

12 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 of the volume actuator. The output is connected to terminal 15 and is the 5th LED down on card 1. Volume Decrease Motor:• Activates the output assigned to the decrease input of the volume actuator. The output is c...

13 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 13 • Instruments Calibration Overview The Instrument Calibration screen allows the operator to de fi ne how the Vission 20/20 will interpret the signal from any devices attached to the panel’s analog input...

14 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 14 • Slide Calibration Overview The Slide Calibration screen is used in calibrating the slide actuators and to establish Vission 20/20 control parameters. It is important that the operator uses cau-tion wh...

14 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 mechanical stops for normal slide travel. These soft-ware limits purpose is to prevent the slide from actu-ally hitting the mechanical stops which could result in a number of undesirable consequences. By default, ...

14 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 4. From the main screen select the Menu button.5. On the menu screen select the Slide Calibration but-ton. When the “Slide Valve Calibration” screen appears, then you can safely connect the Power Cable (Yellow TUR...

14 – 5 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Slide Valve Troubleshooting Guide The Analog output card of the Vission 20/20 produces a 4–20mA signal to any attached devices. However, it is not uncommon that small differences in the board components might resu...

14 – 7 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Slide Valve Actuator Troubleshooting Guide Blink Code Vilter actuators communicate problems discovered by the internal diagnostics to the technician by LED blink codes. Only one blink code is displayed, even thoug...

15 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 15 • Trend Chart Overview This screen allows the operator to view and adjust set-tings for the trend chart, see Figure 15-1. Trend Chart Screen. Trending feature can be started & stopped from this scre...

15 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 zoom level operator can view 3 minutes of trend data and Zoom In button will be inactive. At minimum zoom level operator can view full 120 hours of trend data and Zoom Out button will be inactive. Back/Forward:• T...

15 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Figure 15-2. Trend Setup Screen Section 15 • Trend Chart Setup The operator can modify options for pen selection drop-down box from trend setup screen, see Figure 15-2. Trend Setup Screen.Trend setup screen will a...

16 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 16 • Event List Overview This screen is designed to display compressor events in chronological order. The information available on the screen is valuable for understanding the operation of the compressor a...

18 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 18 • Auxiliary Input / Output Overview The Auxiliary Input/Output (I/O) section of the Vission 20/20 gives the operator fl exibility to add peripheral instruments and/or devices such as motors, valves and ...

18 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Inhibit Check:• Selecting this checkbox enables the inhibit function of the Vission 20/20 for the desired digital input. An inhibit check prevents the compressor from starting if the condition is true where a trip...

19 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 19 • Configuration Overview The con fi guration screen is where most of the Vission 20/20 features are enabled and con fi gured, see Figure 19-1. Con fi guration Screen - Page 1. The initial Setup of the V...

19 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 19 • Configuration Compressor Control Vilter compressors typically run in one of two control modes, suction pressure or process temperature con-trol, see Figure 19-2. Con fi guration Screen - Page 2. Sucti...

19 – 6 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 19 • Configuration Digital Inputs The Vission 20/20 has several digital inputs that the op-erator can choose how the input will be used. Once an input is enabled, the Auxiliary I/O screen will be avail-abl...

19 – 7 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Analog Inputs The Vission 20/20 has several Analog inputs that the operator can choose how the input will be used. Once an input is enabled, the Auxiliary I/O screen will be avail-able from the menu screen where t...

20 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 20 • Data Backup Overview The database backup screen provides the operator a way to extract information out of the Vission 20/20 for backup purposes or diagnostics, see Figure 20-1 Data Backup Screen. Thro...

21 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 21 • Maintenance Overview The maintenance screen is a convenient place to keep track of the the maintenance performed and any upcom-ing maintenance recommended by Vilter. Based on this page, banners will b...

22 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 22 • User Access Overview The user access screen is where all operators go to log in. In the Vission 20/20, each screen has a security level, whereby allowing operators, technicians and/or supervi-sors the...

22 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 either select the username from the operators win-dow or enter the username manually by touching the entry box and entering the name via the pop-up keyboard. Operator Password:• This entry box is for the operator’...

23 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 23 • Help Screen Overview Use this screen to receive help on other setpoint screens contained within the software. These help fi les can be accessed from any screen. The help fi les describe the functional...

24 – 1 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 ...

24 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Operation Once the twin screw is con fi gured, its operation is very similar as the single screw and all options that are avail-able for single screw con fi guration are also available for twin screw. The only ope...

25 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 25 • Cool Compression Control Overview The cool compression compressor operation is similar to the standard single screw compressor units, except there is no external oil cooler to the unit. A blanket of l...

25 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 enable Superheat Monitoring on the screen. • As previously described, Cool Compression compressor does not have an oil pump. Instead it has a suction oil injection solenoid to pro-vide oil and liquid ammonia for l...

25 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 25 • Cool Compression Control • Auto Load Timer • This timer de fi nes the maximum time that the Auto Load operation will be engaged. After the timer expires, Auto Load will be disengaged. • Auto load will...

25 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 25 • Cool Compression Control operational differences that are mostly associated with the compressor safeties:1. The Cool Compression program ignores, • Low Oil Separator Alarm / Trip at start• High Filter...

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 TOC - 8 How to Use This Manual This manual contains instructions for the Vission 20/20 Operation & Service Manual. It has been divided into 25 sections. Section 1: Operational Flow ChartsSection 2: Installation Recom...

1 – 1 Figure 1-1. Operational Flow Charts (1 of 2) Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 1 • Operational Flow Charts Volume and Capacity slides are less than 5% Oil Separator Temp >Oil Sep Start Trip Setpt Filter Diff Press < Start Filter Diff ...

2 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 2 • Installation Recommendations Proper Wiring Sizing • Always size wire gauges as speci fi ed by the National Electrical Code (NEC) for electronic control devices. • For improved noise immunity, install on...

2 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 2 • Installation Recommendations Grounding • Continuous grounds must be run from the util- ity ground to the Vission 20/20, see Figure 2-3. Grounding. • Grounds must be copper or aluminum wire.• Never use c...

2 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Figure 2-5. Correct Transformer Wiring Method Wiring Methods • Each Vission 20/20 panel should have its own indi- vidual control transformer, see Figure 2-5. Correct Transformer Wiring Method and Figure 2-6. Incorr...

2 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Best Practices • Do: • Keep AC wires away from circuit boards.• Always run conduit into the bottom or sides of an enclosure.• If the conduit must be placed in the top of an enclosure, use a water-tight conduit fi t...

3 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 3 • Hardware Architecture Overview The Vission 20/20 control panel utilizes X-86 PC technol-ogy with a Linux operating system. For hardware archi-tecture, see Figure 3-1 Hardware Architecture Overview.The V...

3 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Digital Input/Output (I/O) Refer to Table 2-1. Digital I/O. Compressor Start Output:• When the Vission 20/20 signals the compressor to start, this output is energized. When the Vission 20/20 signals the compressor ...

3 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 High Level Shutdown Input:• This input must be energized in order for the com- pressor to operate. If de-energized, the compressor will shut down and issue a high level trip. Oil Level Float Switch #1 Input:• Used ...

3 – 8 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Digital Output Boards The digital output board convert signals generated by the Vission 20/20 program into 120Vac signals that can be energize or signal other devices. All the signals are digital in that the only t...

3 – 9 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Digital Input Boards The digital input board convert 120Vdc signals from ex-ternal devices to signal for the Vission 20/20 program. All the signals are digital in that the only two states avail-able or either on or...

3 – 10 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Digital In-Out Boards The digital input - output board convert signals gener-ated by the Vission 20/20 program into 120Vac signals as well as detect external 120Vac inputs to signal the Vission 20/20 program.All t...

3 – 11 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 3 • Hardware Architecture Analog Input Boards The analog input board convert varying DC signals into a signal that can interpreted by the Vission 20/20 pro-gram. The signals are considered analog because t...

3 – 12 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 3 • Hardware Architecture Analog Input Jumper Tables The following tables are used to con fi gure each channel of the analog input board signal type and range desired by the operator, see Table 2-4. Analog...

3 – 14 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Analog Output Boards The Analog Output board convert signals form the Vission 20/20 program into a current ranging from 4mA to 20mA, see Figure 3-7. Analog Output Board Layout. Voltage LEDs:• Marked in the diagram...

4 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 4 • Main Screen Figure 4-2. Top Status Bar Top Status Bar The standard view of the status bar shows three pieces of information. From left to right , the bar shows the con-trol method, the current run mode,...

4 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Figure 4-3. Parameter Bar Parameter Bar The main purpose of the Parameter Bar is to display the common operational parameters that the operator would be most concerned with. It also gives the operator access to cri...

4 – 5 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Bottom Status Bar The bottom status bar gives the operator easy access to some basic functions and information. The functions are available via the four button, see Figure 4-5. Bottom Status Bar. Maintenance Button...

4 – 6 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 4 • Main Screen Splash Screen The splash screen is the dynamic portion of the screen that will change as the operator navigates through the Vission 20/20 panel screen, see Figure 4-6. Splash Screen. The mai...

6 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 6 • Compressor Control Overview The compressor control screen is where an operator can set the majority of the compressor settings. These set-ting de fi ne how the compressor will operate and respond to cha...

6 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 As mentioned in the above paragraph, the distance of the process variable from the control setpoint deter-mines the size of the pulse used to move the capacity slide. This is called the proportional band and is set...

6 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 NOTE VFD installation is not covered in this manual. A VFD that is not properly installed and con fi gured has the potential of causing intermittent and dangerous problems. Please consult your VFD manual. 1 Step VF...

6 – 5 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 This button is active only when compressor is in local Auto mode and Control Mode Con fi gured is Suction Pressure. This button will display “Run” when Pumpdown operation has not started or stopped, while button wi...

7 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Overview The Alarms and Trips screen allows the operator to view and adjust settings for compressor safety and alarm set-tings, see Figure 7-1. Alarms and Trips Screen. Vission 20/20 uses Alarms as a way to notify ...

7 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Compressor Inhibits The Vission 20/20 uses several start inhibits to prevent the compressor from starting to protect the compres-sor and the refrigeration system. While starting the compressor, the inhibits are che...

8 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Overview The timers screen allows the operator to view and adjust timer settings associated with compressor operation. There are different types of timers that the operator should be aware of listed below, see Figu...

9 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 as “Unscheduled” if operator does not want to use all 4 events per day. Time:• This setpoint allows selection of Hours, Minutes and AM/PM values for an event. When time set for an event is achieved, control mode wi...

10 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 10 • Compressor Sequencing Overview Compressor sequencing screen is where more than one Vission 20/20 panels can be sequenced in network using Modbus TCP. These settings de fi ne how the master com- presso...

11 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 11 • Condenser Control Overview This screen allows the operator to view and adjust con-denser setpoint settings associated with condenser op-eration. This screen will only be active if the Condenser Contro...

11 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Condenser Press:• This is the read only parameter and it displays the present value of condenser pressure. Condenser Setpoint:• This is the condenser pressure setpoint that needs to be maintained. Upper Deadband:•...

11 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Figure 11-2. Step Control Screen Section 11 • Condenser Control selected as Low Speed Fan through combo box. E.g.: Let’s say Out #2 is selected as Low Speed Fan in Step 2. When step 2 becomes active during condens...

12 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 12 • Service Options Overview The Service Option screen allows the operator the abil-ity to force individual digital or analog outputs ON. This feature is used for diagnostic purposes during initial setup ...

12 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 of the volume actuator. The output is connected to terminal 15 and is the 5th LED down on card 1. Volume Decrease Motor:• Activates the output assigned to the decrease input of the volume actuator. The output is c...

13 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 13 • Instruments Calibration Overview The Instrument Calibration screen allows the operator to de fi ne how the Vission 20/20 will interpret the signal from any devices attached to the panel’s analog input...

14 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 14 • Slide Calibration Overview The Slide Calibration screen is used in calibrating the slide actuators and to establish Vission 20/20 control parameters. It is important that the operator uses cau-tion wh...

14 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 mechanical stops for normal slide travel. These soft-ware limits purpose is to prevent the slide from actu-ally hitting the mechanical stops which could result in a number of undesirable consequences. By default, ...

14 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 4. From the main screen select the Menu button.5. On the menu screen select the Slide Calibration but-ton. When the “Slide Valve Calibration” screen appears, then you can safely connect the Power Cable (Yellow TUR...

14 – 5 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Slide Valve Troubleshooting Guide The Analog output card of the Vission 20/20 produces a 4–20mA signal to any attached devices. However, it is not uncommon that small differences in the board components might resu...

14 – 7 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Slide Valve Actuator Troubleshooting Guide Blink Code Vilter actuators communicate problems discovered by the internal diagnostics to the technician by LED blink codes. Only one blink code is displayed, even thoug...

15 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 15 • Trend Chart Overview This screen allows the operator to view and adjust set-tings for the trend chart, see Figure 15-1. Trend Chart Screen. Trending feature can be started & stopped from this scre...

15 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 zoom level operator can view 3 minutes of trend data and Zoom In button will be inactive. At minimum zoom level operator can view full 120 hours of trend data and Zoom Out button will be inactive. Back/Forward:• T...

15 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Figure 15-2. Trend Setup Screen Section 15 • Trend Chart Setup The operator can modify options for pen selection drop-down box from trend setup screen, see Figure 15-2. Trend Setup Screen.Trend setup screen will a...

16 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 16 • Event List Overview This screen is designed to display compressor events in chronological order. The information available on the screen is valuable for understanding the operation of the compressor a...

18 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 18 • Auxiliary Input / Output Overview The Auxiliary Input/Output (I/O) section of the Vission 20/20 gives the operator fl exibility to add peripheral instruments and/or devices such as motors, valves and ...

18 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Inhibit Check:• Selecting this checkbox enables the inhibit function of the Vission 20/20 for the desired digital input. An inhibit check prevents the compressor from starting if the condition is true where a trip...

19 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 19 • Configuration Overview The con fi guration screen is where most of the Vission 20/20 features are enabled and con fi gured, see Figure 19-1. Con fi guration Screen - Page 1. The initial Setup of the V...

19 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 19 • Configuration Compressor Control Vilter compressors typically run in one of two control modes, suction pressure or process temperature con-trol, see Figure 19-2. Con fi guration Screen - Page 2. Sucti...

19 – 6 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 19 • Configuration Digital Inputs The Vission 20/20 has several digital inputs that the op-erator can choose how the input will be used. Once an input is enabled, the Auxiliary I/O screen will be avail-abl...

19 – 7 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Analog Inputs The Vission 20/20 has several Analog inputs that the operator can choose how the input will be used. Once an input is enabled, the Auxiliary I/O screen will be avail-able from the menu screen where t...

20 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 20 • Data Backup Overview The database backup screen provides the operator a way to extract information out of the Vission 20/20 for backup purposes or diagnostics, see Figure 20-1 Data Backup Screen. Thro...

21 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 21 • Maintenance Overview The maintenance screen is a convenient place to keep track of the the maintenance performed and any upcom-ing maintenance recommended by Vilter. Based on this page, banners will b...

22 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 22 • User Access Overview The user access screen is where all operators go to log in. In the Vission 20/20, each screen has a security level, whereby allowing operators, technicians and/or supervi-sors the...

22 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 either select the username from the operators win-dow or enter the username manually by touching the entry box and entering the name via the pop-up keyboard. Operator Password:• This entry box is for the operator’...

23 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 23 • Help Screen Overview Use this screen to receive help on other setpoint screens contained within the software. These help fi les can be accessed from any screen. The help fi les describe the functional...

24 – 1 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 ...

24 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Operation Once the twin screw is con fi gured, its operation is very similar as the single screw and all options that are avail-able for single screw con fi guration are also available for twin screw. The only ope...

25 – 1 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 25 • Cool Compression Control Overview The cool compression compressor operation is similar to the standard single screw compressor units, except there is no external oil cooler to the unit. A blanket of l...

25 – 2 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 enable Superheat Monitoring on the screen. • As previously described, Cool Compression compressor does not have an oil pump. Instead it has a suction oil injection solenoid to pro-vide oil and liquid ammonia for l...

25 – 3 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 25 • Cool Compression Control • Auto Load Timer • This timer de fi nes the maximum time that the Auto Load operation will be engaged. After the timer expires, Auto Load will be disengaged. • Auto load will...

25 – 4 Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153 Section 25 • Cool Compression Control operational differences that are mostly associated with the compressor safeties:1. The Cool Compression program ignores, • Low Oil Separator Alarm / Trip at start• High Filter...