Dometic PLC Multi Panel PGD1 Chiller Control
The Dometic PLC Multi Panel PGD1 is a marine chiller control system designed for managing multiple chiller units with advanced features, flexible sequencing, and comprehensive fault protection monitoring.
Key Features and Capabilities
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The PGD1 controller allows selection and sequencing of up to six chillers, two chilled water pumps, and two seawater pumps.
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The system uses a microprocessor and PLC (Programmable Logic Control) technology with a simple six-button keypad for setup, parameter adjustment, and mode changes.
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You can set heating or cooling setpoints, monitor chilled water temperatures, review pump current information, and oversee system status for all available stages from the main display.
Technical Operation and Integration
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The PGD1 supports single and multistage chiller operation, using temperature differential and hysteresis for capacity management.
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Sensors utilized include NTC thermistors for temperature (10 kΩ @ 25°C) and ratiometric pressure transducers for suction and discharge monitoring.
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Digital inputs are used to check system protection status at startup and must be clear of faults before normal operation begins.
User Interface and Navigation
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The LCD interface lets operators enable/disable chillers and change parameters.
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PGD1 supports alarms display, provides systematic troubleshooting help, and features a historical log of faults for diagnostics.
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Additional touchscreen navigation and remote support (e.g., over VNC) may be enabled depending on panel options.
Installation and Networking
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Designed for flexible deployment as standalone or networked multistage systems, with options for modbus and networked operation across multiple chillers.
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PLC and display panels are installed with specific wiring and network addressing per stage, ensuring synchronization and control integrity.
Advanced Control Functions
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Compressor and pump current monitoring, condenser freeze protection, electric heat integration, and runtime equalization sequencing are standard features.
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Trends, graphs of operating data, and history can be viewed and exported via USB for deeper analysis.
The Dometic PGD1 Multi Panel PLC is a robust, scalable marine chiller control solution, well-suited for multi-stage and multi-unit cooling systems needing detailed monitoring, automated sequencing, and remote support.
PLC Multi Panel PGD1 chiller control
