1. Product Overview
The Silverflo 902D-IV is a versatile 2-in-1 soldering station combining a hot air rework station and a T12 soldering iron. Designed for precision work, it features rapid heating, digital temperature control, and multiple intelligent functions to enhance efficiency and safety for various electronic repair tasks, including SMD and IC components.


2. Setup
- Unpacking: Carefully remove all components from the packaging. Verify that all items listed in the product package are present.
- Placement: Place the main unit on a stable, heat-resistant surface, ensuring adequate ventilation around the device.
- Connect Hot Air Gun: Plug the hot air gun cable into the designated 'SMD REWORK' port on the front panel. Place the hot air gun in its holder on the side of the unit.
- Connect Soldering Iron: Plug the soldering iron cable into the designated 'SOLDERING' port on the front panel. Place the soldering iron in its stand.
- Install Soldering Tip: The T12 soldering iron uses a one-piece heating core tip. To install or replace, simply push the tip firmly into the soldering iron handle until it clicks into place. Ensure it is securely seated.
- Power Connection: Connect the power cord to the main unit and then to a suitable power outlet (ensure voltage matches your region: 120V US, 220V EU, 230V UK, or 240V AU).

3. Operating Instructions
3.1 Power On/Off
Press the main power switch located on the rear of the unit to turn the station ON or OFF. The LCD display will illuminate upon power-on.
3.2 Temperature Adjustment
- Hot Air Rework Station: Use the '+' and '-' buttons under 'SMD REWORK' to adjust the temperature. The adjustable range is 100℃ to 480℃ (212℉ to 896℉).
- Soldering Station: Use the '+' and '-' buttons under 'SOLDERING' to adjust the temperature. The adjustable range is 200℃ to 480℃ (392℉ to 896℉).

3.3 Memory Channels (CH1, CH2, CH3)
The unit features three memory channels (CH1, CH2, CH3) for both the hot air rework station and the soldering station. These allow for quick access to pre-configured temperatures.
- To Save a Temperature: Set your desired temperature using the '+' and '-' buttons. Press and hold one of the CH buttons (CH1, CH2, or CH3) until the display flashes, indicating the temperature is saved.
- To Recall a Temperature: Simply press the desired CH button (CH1, CH2, or CH3) once to instantly switch to the saved temperature.

3.4 Celsius/Fahrenheit Switching
The unit supports switching between Celsius (℃) and Fahrenheit (℉) display modes.
- Press the hot air gun '+' button and soldering iron '-' button simultaneously. The display will show 'F' or 'C'.
- Press the hot air gun '+' or '-' button to select 'C' or 'F'.
- After selection, the system will automatically exit the setting mode after 5 seconds.

3.5 Digital Temperature Calibration
For more accurate temperature control, the unit allows for digital temperature calibration.
- Press the '+' button of the soldering iron station (air gun) and '-' button of the soldering iron at the same time. The display will show the temperature with 3 decimal points (e.g., 3.0.0).
- Press the '+' button of the soldering iron station (air gun) to input the measured temperature.
- Press the '+' button of the soldering iron station (air gun) at the same time, and the system will automatically correct the temperature and exit the correction state.

3.6 Automatic Induction Cooling (Hot Air Gun)
When the hot air gun is placed back into its holder, it automatically enters a cooling mode to prolong the life of the heating element and ensure safety. When lifted, it rapidly heats to the set temperature.

3.7 Sleep Mode and Auto Shutdown (Soldering Iron)
The soldering iron features an intelligent sleep mode and auto-shutdown function to prevent tip oxidation and save energy.
- Sleep Mode: If the soldering iron is rested in its stand for 10 minutes, it will automatically enter sleep mode, reducing the tip temperature to prevent oxidation. The display will show 'SLP'.
- Auto Shutdown: If the soldering iron is not woken from sleep mode after 30 minutes, the unit will automatically shut down for safety and energy conservation.

3.8 Typical Applications
- Hot Air Rework Station: Ideal for heat shrink, wire welding, and removing/reworking SMD components on circuit boards.
- Soldering Station: Suitable for general soldering tasks, including working on circuit boards and making bigger solder joints.


Video 1: Silverflo 902D-IV Product Demonstration. This video showcases key features such as T12 tip replacement, temperature control, auto-cooling for the hot air gun, and the use of memory channels.
4. Maintenance
- Cleaning Soldering Tips: Regularly clean the soldering iron tip using the provided metal cleaning ball or cleaning sponge. This helps prevent oxidation and ensures efficient heat transfer.
- Replacing Soldering Tips: When a tip becomes worn or damaged, replace it with a new T12 one-piece heating core tip. Ensure the unit is off and cooled before replacement.
- General Cleaning: Keep the main unit and tools free from dust and solder debris. Use a soft, dry cloth for cleaning. Do not use abrasive cleaners or solvents.
- Hot Air Gun Nozzles: Ensure hot air gun nozzles are clear of obstructions. Clean as needed.

5. Troubleshooting
- No Power: Check the power cord connection and ensure the main power switch is ON. Verify the power outlet is functional.
- No Heat from Soldering Iron/Hot Air Gun: Ensure the tools are properly connected to their respective ports. Check if the temperature is set correctly and not in sleep mode. If the issue persists, the heating element or tip may need replacement.
- Inaccurate Temperature Reading: Perform a digital temperature calibration as described in section 3.5. Ensure the tip is clean and properly seated.
- Hot Air Gun Not Cooling Down: Ensure the hot air gun is correctly placed in its holder. The automatic induction cooling should activate. If not, check for obstructions or contact support.
- Soldering Iron Enters Sleep Mode Too Quickly: Verify the sleep mode settings. The default is 10 minutes.
6. Specifications
| Feature | Specification |
|---|---|
| Model | 902D-IV |
| Rated Power (Total) | 775W |
| Rated Power (Hot Air Rework Station) | 775W |
| Rated Power (Soldering Iron) | 75W |
| Display | LCD |
| Temperature Range (Hot Air Rework Station) | 100℃〜480℃ (212℉〜896℉) |
| Temperature Range (Soldering Station) | 200℃〜480℃ (392℉〜896℉) |
| Air Delivery | Brushless fan with smooth air delivery |
| Air Volume (Measured at Exhaust) | ≤120L/min |
| Certification | CE, FCC |
| Functions | T12 One-piece Heating Core, Digital Temperature Calibration, Auto Stand-by Mode, Sleep Mode, Heat up quickly, 2 in 1 T12 soldering station |
| Package Dimensions (L x W x H) | 27 cm x 26 cm x 10 cm |
| Package Weight | 1.9 kg |
7. User Tips
- Tip Tinning: Always tin your soldering iron tip before and after use to prevent oxidation and ensure a longer lifespan.
- Temperature Selection: Start with lower temperatures and gradually increase if needed. Excessive heat can damage components and shorten tip life.
- Ventilation: Always work in a well-ventilated area to avoid inhaling solder fumes.
- Safety First: Always wear appropriate safety glasses when soldering or using the hot air gun.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.