Leak Detection and Automatic Refrigerant Pump Down
Improving Safety and the Environment
The system monitors refrigerant leakage continually and provides a warning before refrigerant leaks, preventing major refrigerant loss and potentially damaging the system’s efficiency. The new system can improve potential refrigerant loss to approximately 90%.
As well as ensuring safe and reliable operation, Panasonic’s Pump Down System contributes to a building qualifying for additional BREEAM points and enables compliance with current EN378 2008 standards, covering applications where refrigeration concentration levels exceed practical safety limits of 0,44 kg/m³.
Panasonic has developed two detection methods that can operate simultaneously to offer complete protection for owners, building occupiers and the environment.
This innovative pump down system can be connected in two ways:
- With sensor leakage
- Without sensor leakage, using only the innovative algorithme.
Basic pump down function:
- Detect the leakage
- Activate pump down process
- Collect the gas on the tank
- Close the valves to isolate the gas
Key points:
- Comply with legislation
- Protect personnel
- Protect the environment
- Save on operating costs
This option should be implemented in any area in non-compliance with BS EN 378:2008. The leak detector is connected directly to the indoor unit via the dedicated PAW-EXCT connector and the Pump Down System is directly connected to the outdoor unit PCB.
The Pump Down System will activate when a leak is detected in the room and initiate a refrigerant reclaim operation immediately, the refrigerant will be collected inside the outdoor units’ heat exchanger and optional receiver tank for larger systems.
Due to the exclusive ECOi software the leak detection sensors are able to communicate directly via the P-link which means no additional communication panels, cabling or software is required.
1. Signal. 2. Leakage! 3. Room 1. 4. Room 2. 5. Leak detector.
In-Direct Leak Detection Method: Unique PLC Algorithm to Determine Refrigerant Leakage
The new innovative algorithm is able to detect leakage of R410A based on abnormal changes in the following conditions, high pressure, low pressure and compressor discharge temperature.
Reclaim of the refrigerant is via the suction line to the heat exchanger(s) of the outdoor unit(s), any surplus refrigerant is collected in the 30l receiver tank. Once fully pumped down the suction line is closed and the unit awaits a ‘Reset’ and ‘Recharge’ command.
PAW-PUDME1A-1: Pump down for 1 outdoor unit system
PAW-PUDME1A-2: Pump down for 2 outdoor units system
PAW-PUDME1A-3: Pump down for 3 outdoor units system
PAW-PUDME1A-1R: Pump down for 1 outdoor unit system + Receiver Kit 30l
PAW-PUDME1A-2R: Pump down for 2 outdoor units system + Receiver Kit 30l
PAW-PUDME1A-3R: Pump down for 3 outdoor units system + Receiver Kit 30l
PAW-PUDMF2A-1: Pump down for 1 outdoor unit system
PAW-PUDMF2A-2: Pump down for 2 outdoor units system
PAW-PUDMF2A-3: Pump down for 3 outdoor units system
PAW-PUDMF2A-1R: Pump down for 1 outdoor unit system + Receiver Kit 30l
PAW-PUDMF2A-2R: Pump down for 2 outdoor units system + Receiver Kit 30l
PAW-PUDMF2A-3R: Pump down for 3 outdoor units system + Receiver Kit 30l
Accessory (common)
PAW-PUDRK30L: Receiver Kit 30l