|
|
| e-LOGIC Refrigeration System |
System Features
- System Consists of Pentium PC with LCD flat screen display, keyboard, mouse, modem, and all necessary digital/analog input and output racks for connecting to external devices, house in a Rittal NEMA panel.
- Computer Control system complete with automatic and manual control to monitor and adjust operating parameters.
- Open Architecture
- Full control in Graphic Mode which allows operator to override any select I/O point.
- Full compressor control via high stage or low stage suction or individual control.
- Internal messaging system (remote to main / main to remote).
- Detailed report menu including evaporator control, defrost times, evaporator temperature schedule, system alarms, system defrost, analog high and low, analog history, and current analog values.
- Archived System Activities - archival of one year of user definable time intervals (15 minutes to 1 hour).
|
Security Features
- Access limitation - recording on every login into system of user i.d., channel number, and time.
- Automatic logoff with no activity.
- Lockout device for each I/O point which operator defines the code.
Remote Communications
- Full remote access capabilities with e-LOGIC remote software only.
- Full manual control via remote location on all equipment (compressors, valve groups, etc.)
- Remote network link capability for file transfers and updates without interfering with control activities.
Documentation
- e-LOGIC dbc/OS 32+ Operators Manual.
- Panel and field wiring diagrams.
- System Operation Library on CD Rom (coming soon).
|
| Refrigeration Software Functionality |
Condensers
- Easy sequence assignment by "click" of a mouse button.
- Controls multiple condensing systems at once.
- Minimal set point for defrost pressure control.
- Purge control timing sequence - end user definable.
Analog Points
- Selectable alarm monitor points (high, low, high and low combined).
- Automatic emergency call out for each selected alarm point (optional).
- Individual analog history trend.
- Additional control parameters / I/O points for each analog point.
- Multiple methods of calibrating specific sensors - High, Low, Average, -0-, and Current valve.
Vessels
- Integrated high level safety lockout.
- Split system shutdown.
- High and Low pump differential pressure safeties.
- Multiple operating levels per vessels - operator defined.
|
Valve Groups
- Full reheat features for all valve groups / control stations.
- Multiple defrost controls.
- User definable off cycle controls - fan cycle and suction valve control.
- Up to six set-point changes per day for each valve group / control station.
- Multiple defrost control settings: run time, fixed schedule, run time skip, and signal (sensor initiated).
- Definable NH3 sensor for emergency shutdown purposes - operator defined.
- Pre-cooling of coil before unit goes into cooling mode.
- User controls analog point (temperature control for each valve group).
Energy Management Features
- Load-shedding via a pulse meter (supplied by the power company).
- Multiple start/stop sequence per day for compressor and engine room setup.
|
|