Emerson 20/20 service manual Condenser Control, Oil Pump, Oil Cooling, Motor Current Device

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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. Configuration 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 defines how the Vission 20/20 will control the oil pump, see Figure 19-2. Configuration 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 defines how the Vission 20/20 will monitor and/or control the temperature of the compressor oil, see Figure 19-2. Configuration Screen - Page 2.

Thermosyphon:

This defines the compressor oil cooling method as thermosyphon.

H20 Oil Cooler:

This defines the compressor oil cooling method as water heat exchange.

Liquid Injection:

This defines 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 defines the method, see Figure 19-2. Configuration Screen - Page 2.

Current Transformer:

This defines the input used for motor current when a current transformer is used.

4-20ma Transformer:

• This defines the input used for motor current.

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153

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Contents Vission 20/20 micro-controller Page Table of Contents Digital I/O Board Layout Top Status Bar TOCCompressor Sequencing Event List Data Backup List of Tables and Figures END of TOC How to Use This Manual Compressor Amperage Load Limiting Operational Flow ChartsRequirements to Start Compressor Critical Compressor Run Logic at Compressor StartOperational Flow Charts 2 Voltage Source Installation RecommendationsProper Wiring Sizing Mixing Voltages DC signalsGrounding Correct Transformer Wiring Method Wiring MethodsBest Practices Overview Hardware ArchitectureDigital Input/Output I/O Board Description Type Digital I/O 1Refer to -2. Analog Inputs Motor Current Analog InputsAnalog Inputs 1 Digital I/O 2Digital & Analog I/O Boards Layout Analog OutputsDigital I/O Board Layout Analog Inputs 2Digital Output Board Layout Digital Output BoardsDigital Input Board Layout Digital Input BoardsDigital Input-Output Board Layout Digital In-Out BoardsAnalog Input Board Layout Analog Input BoardsAnalog Input Jumper Tables Channel SignalJP-13 JP-14 JP-15 JP-31 Analog Output Board Layout Analog Output BoardsMain Screen Main ScreenTop Status Bar Parameter Bar Unit Start Pop-Up Window Bottom Status Bar Splash Screen Navigation Buttons Menu ScreenMenu Screen Pulse Proportional Control Compressor ControlProportional Band & Setpoint Auto-CycleVFD One-Step Control Method Variable Frequency Drive VFDPumpdown Control Pulldown Control Capacity Slide Triggered Outputs Control ModeVolume Slide Position Offset Stop Load and Force UnloadLiquid Injection Load AnticipatingOil Control Compressor Control Alarms and Trips Setpoints Alarms and TripsAlarms and Trips Compressor Inhibits Safety Failure MessagesFalse Start Timer Setpoints TimersOil Separator Level #2 Safety Trip Delay Timers Blank Scheduling Setpoint Compressor SchedulingCompressor Scheduling Pressure Control Setpoints Compressor SequencingCFM Equipment List 10 4 / Blank Condenser Control Setpoint Condenser ControlStep Control Step Control Screen VFD Settings11 4 / Blank Digital Outputs Service OptionsAnalog Outputs Instruments Calibration Pressure and Temperature InputsRemote Capacity Motor CurrentAnalog Inputs 13 4 / Blank Capacity Slide Valve Potentiometer Slide CalibrationSlide Valve Actuator Calibration for Optical Style Motors Volume Slide Valve PotentiometerSlide Valve Operation Photochopper Command Shaft Rotation Required By Actuator Command Shaft RotationSlide Valve Troubleshooting Guide 1 Slide Valve Troubleshooting GuideSlide Valve Troubleshooting Guide 2 LED Blink Codes and Troubleshooting Guide 1 Slide Valve Actuator Troubleshooting Guide Blink CodePleted. The actuator will not move while this error code LED Blink Codes and Troubleshooting Guide 2Chart Operation Trend ChartTrend Data Storage Trend Setup Screen Setup15 4 / Blank Event list Columns Event List16 2 / Blank Input/Output Screen Input / Output17 2 / Blank Digital Inputs Auxiliary Input / OutputDigital Outputs Control 18 4 / Blank Time & Date ConfigurationUnits Anti-Recycle CommunicationsTouchscreen Model & Refrigerant Restart On Power FailureCompressor Sequencing LanguageOptional Function Selection Compressor ControlMotor Current Device Condenser ControlOil Pump Oil CoolingDigital Inputs Analog Inputs Analog Outputs Configuration 19 10 / Blank Save / Load Data BackupData Backup Migrate Factory Reset20 4 / Blank Checklist MaintenanceLog ChartApply User AccessManage Accounts LoginScreen Security Levels Security Access Levels22 4 / Blank Help Screen Screen FeaturesVersion Pop-Up Screen Twin Screw Control Screen Twin Screw ControlOperation Cool Compression Control Screen Cool Compression ControlCool Compression Control Functions Screen Control FunctionsOperational Differences from Single Screw Auto Load TimerCool Compression Control

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