After adding FFU to the clean room, can the original control system still be used?
Direct answer: It is possible, but you must first check the control capacity, power supply margin, communication interface, address range and partition settings of the original system, and then confirm whether the newly added FFU motor is compatible with the controller. Even if the control system can be connected to new equipment, the air volume and clean room air flow balance still need to be re-adjusted.
Expansion projects often hope to use the original FFU group control system to reduce the scope of transformation. The key to whether it can continue to be used is not 'how many units can be connected', but the newCan the FFU power supply, address, speed adjust and feedback operating status according to the original rules?
Three situations, different handling methods
On-site situation |
control scheme |
The original controller has capacity margin, the new FFU interface is compatible with the protocol, and the address and power supply can be expanded. |
You can consider continuing to use it and reconfigure and debug after adding new equipment. |
The controller capacity is insufficient, but the original architecture allows adding partitions or controllers |
Consider local expansion and unify addresses and monitoring rules. |
The motor control methods or communication interfaces of the old and new FFU are incompatible, and the original system cannot be expanded. |
The control structure should be redesigned or the sub-system operation plan should be clarified |
'Both are AC FFU' or 'Both are EC FFU' cannot directly prove control compatibility. The specific speed adjustment interface, communication rules and status feedback methods of the newly added equipment should be checked item by item with the original control system data.
Check five pieces of information before expansion
The equipment ledger and controller specifications of the original system, the existing communication wiring diagram, address allocation table, power supply circuit diagram, as well as the work and duty mode settings of each partition are important basis for judging whether it can be used. It should also be confirmed whether the original system has address and loop margin, and whether the on-site wiring distance and wiring space allow for additional equipment.
If you are ready to chooseFor FFU group control system- related solutions, the control boundaries of old and new equipment should be determined before equipment purchase to avoid discovering that interfaces need to be converted or control partitions must be rearranged after FFU arrives.
Successful control access does not mean that the clean room meets the standards
Increasing FFU will change the regional air supply volume. assemblyAfter HEPA or ULPA filter , the actual air volume of new equipment also depends on the operating gear and resistance conditions. After the new FFU is connected to the original system, check whether the control command is consistent with the actual gear, and re-measure the air volume, airflow distribution and pressure difference in relevant areas at key locations.
If the air supply volume of the newly added equipment is large, the original return air path must also be rechecked. By only confirming that the communication is online without reviewing the airflow balance, the cleaning effect after the expansion may still be inconsistent with the design.
Aili Industrial's supporting equipment covers fans, motors, control systems, sheet metal structures, filters and complete machine matching. The expansion project can check the interface and performance of the new FFU with the existing system based on the original control data, ceiling diagram, target air volume and new quantity; if necessary, first use a prototype to verify the communication, speed regulation and air supply conditions, and then determine the batch expansion plan. The specific configuration is subject to the project technical agreement and on-site test results.
The two most important questions to ask when expanding capacity are: How much control and power supply capacity is available in the original system? Can the newly added FFU be controlled according to the protocol, address and operating mode of the original system? Only after these two items are clear can decisions be made to continue using, partially expand, or reset the control architecture.
