The air shower room serves as the first line of defense in maintaining a clean environment within a dust-free workshop. Once delivered to the installation site, it typically arrives in a disassembled state with all components packed as spare parts. Therefore, proper assembly and correct wiring are essential before commissioning. After everything is set up correctly, the air shower chamber can be used efficiently. Although different manufacturers may have varying designs, the fundamental principles and installation procedures remain largely similar. Below is a detailed guide on how to assemble and wire an air shower room for purification systems in South China:
**1. Wiring the Air Shower**
- **Power Supply**: The system requires either a 24V DC or 24V AC power supply. Always refer to the control wiring diagram provided by the manufacturer for accurate connections.
- **Input Terminals**:
- X1: External door jog switch
- X2: Internal door electric switch
- X3: External door magnet
- X4: Internal door magnet
- X5: Infrared sensor inside the air shower
- X6: Unused
- X7: External door clip
- X8: Internal door clip
- **Display**: An LCD screen is connected via a 9-pin serial cable. The screen receives a 24V DC power supply from the system.
- **Output Relays**:
- R1–R8 are connected to a relay board.
- R1 & R2 share COM1–2; R3 & R4 share COM3–4; R5 & R6 share COM5–6; R7 & R8 share COM7–8.
- R1 connects to the SL terminal of the external door closer, while COM1–2 connects to GND.
- R2 connects to the SL terminal of the internal door closer, and COM1–2 also connects to GND.
- R3/R4 are for the fan relay, with COM3–4 connected to the 220V AC L terminal.
- R5/R6 control the lighting, with COM5–6 connected to 220V AC L.
- R7 is connected to the emergency switch, and R8 is connected to the status lamp, with COM7–8 linked to GND.
**2. Operating the System**
To operate the air shower, start by pressing the button on the screen to turn on the backlight. Navigate using the down arrow to access the settings menu. You can adjust the time settings for the outer door, inner door, and fan. Use the left or right arrows to modify the digits, then press the ENT key to save your changes. Press ESC to return to the previous menu, and ALM is the emergency button.
**3. Workflow of the Air Shower Room**
When the outdoor door is opened, the air shower automatically starts. Personnel enter, and once the last person has entered, the door closes. The infrared sensor detects movement, triggering the fan to start. The inner door then opens. As the person exits, the timer begins. If the door is closed and re-opened, the inner door will open again. When someone enters, the inner door closes, and the outer door opens immediately.
**4. Common Issues and Solutions**
If the system isn't working properly, check the display for error messages. Ensure that the outer door is fully closed, and the inner door should show a white indicator. The fan should be active when running, and the anti-pinch sensors should light up when triggered. If a component doesn’t respond, check the corresponding wiring. Also, ensure that the door magnets are properly engaged and that the infrared sensors are not obstructed. If a person is detected, the sensors should activate accordingly.
Proper installation and maintenance of the air shower system are crucial for ensuring optimal performance in cleanroom environments. Always follow the manufacturer's guidelines and conduct regular checks to maintain efficiency and safety.
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