Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the SUNTEC AN67C 7233-4 oil pump for boiler burner applications. Please read this manual thoroughly before attempting any procedures.

Setup and Installation
Proper installation is crucial for the optimal performance and longevity of the oil pump. Refer to the technical diagram for port identification and dimensions.
1. Mounting
Securely mount the pump using the designated mounting points. Ensure the pump is stable and free from excessive vibration.
2. Port Connections
Connect the oil lines to the appropriate ports as identified in Figure 2:
- 1. Suction: Inlet for oil from the tank.
- 2. Return and internal by-pass plug: For returning excess oil or for bypass functionality.
- 3. Nozzle outlet: Connects to the burner nozzle.
- 4. Pressure gauge port: For connecting a pressure gauge to monitor pump output pressure.
- 5. Vacuum gauge port: For connecting a vacuum gauge to monitor suction line conditions.
- 6. Pressure adjustment: Knob for setting the pump's output pressure.
- 7. Pressure port (only for "7000" series): Specific to certain series, note if applicable.
3. Axis Rotation Direction
The pump's performance is dependent on the correct axis rotation direction. Refer to Figure 3 for the flow label and corresponding rotation directions:
- A: Clockwise rotation, Right oil outlet
- B: Clockwise rotation, Left oil outlet
- C: Counterclockwise rotation, Left oil outlet
- D: Counterclockwise rotation, Right oil outlet
Ensure the pump is installed to match the required rotation direction of your boiler burner system.


Operating Instructions
The SUNTEC AN67C 7233-4 oil pump is designed for reliable operation in boiler burner systems. Observe the following guidelines:
1. Initial Start-up
Before starting the burner, ensure all connections are secure and there are no leaks. Prime the pump if necessary, following your burner manufacturer's instructions.
2. Pressure Adjustment
The pump features a pressure adjustment mechanism (Port 6 in Figure 2). The bypass pressure is limited to 2 bar maximum, as indicated on the pump body. Adjust the pressure according to the boiler burner's specifications. Use a pressure gauge connected to the pressure gauge port (Port 4) for accurate readings.
3. Monitoring
Regularly monitor the pressure and vacuum gauges during operation to ensure the pump is functioning within normal parameters. Unusual fluctuations may indicate an issue.
4. Performance Characteristics
While specific performance curves for the AN67C model are not provided in detail, the general relationship between capacity and pressure for similar SUNTEC pumps (AS series, shown in Figure 2) indicates that capacity typically decreases as pressure increases. Consult the burner manufacturer's specifications for required flow rates and pressures.
Maintenance
Regular maintenance helps ensure the longevity and efficient operation of your SUNTEC oil pump.
1. Routine Inspection
- Periodically inspect all oil lines and connections for signs of leaks.
- Check the pump body for any visible damage or unusual wear.
- Ensure mounting bolts are tight.
2. Fuel Quality
Maintain a clean fuel supply. Contaminants in the fuel can lead to pump malfunction and premature wear. Regularly check and clean fuel filters as recommended by your boiler system manufacturer.
3. Professional Service
For any internal maintenance or repairs, it is recommended to consult a qualified technician or the manufacturer's authorized service center.
Troubleshooting
This section provides guidance for common issues you might encounter with the oil pump. For complex problems, contact professional support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No oil flow | Clogged suction line or filter Incorrect pump rotation direction Air in the system | Check and clean suction line/filter Verify and correct rotation direction (refer to Setup) Bleed air from the system |
| Low oil pressure | Incorrect pressure adjustment Worn pump components Bypass valve malfunction | Adjust pressure setting (Port 6) Consult a qualified technician Inspect or replace bypass valve |
| Oil leaks | Loose connections Damaged seals or gaskets | Tighten all connections Replace damaged seals/gaskets |
| Unusual noise | Air in the system Foreign object in pump Worn bearings | Bleed air from the system Inspect pump for obstructions (professional service recommended) Consult a qualified technician |
Specifications
| Feature | Detail |
|---|---|
| Model | AN67C 7233-4 |
| Brand | SUNTEC |
| Application | Boiler Burner Oil Pump |
| Bypass Pressure (Max) | 2 bar |
| Origin | Made in France - 21600 Longvic |
| Approx. Package Weight | 1.5 kg |
| Approx. Package Dimensions | 10 cm (L) x 10 cm (W) x 10 cm (H) |
| Port Identification | Suction, Return/Bypass, Nozzle Outlet, Pressure Gauge, Vacuum Gauge, Pressure Adjustment (Refer to Figure 2) |
| Axis Rotation Options | Clockwise (Right/Left outlet), Counterclockwise (Right/Left outlet) (Refer to Figure 3) |
Dimensional Drawing

User Tips
- Always ensure the fuel supply is clean and free of debris to prevent clogging and damage to the pump.
- Before initial startup or after any maintenance, check for air in the fuel lines and bleed if necessary to ensure smooth operation.
- Regularly check the pressure and vacuum readings to catch potential issues early.
- If replacing an existing pump, ensure the new pump's rotation direction and port configuration match the system requirements.
Warranty and Support
For warranty information, please contact your original seller or the manufacturer directly. This manual does not constitute a warranty statement.
Contact Information
For technical support or inquiries, you may contact the seller, Ignition Transformer Store, using the following details:
- Phone: +8613466577310
- Email: 64423517@qq.com





