How to Install the BilgMon 488

2. Tools and Materials Needed

• Bilgmon 488 unit (24 V or 115/230 V version depending on system requirements)
• Compatible piping and electrical connectors
• Basic hand tools for removing the old alarm and mounting the new unit
• Optional: External relay (if required for high-current ASD devices)

No hot work is required during installation.

3. Removing the Old Bilge Alarm

1. Isolate power to the existing 15 ppm alarm.
2. Disconnect the electrical connections, including alarm outputs and interface signals.
3. Remove the old piping connections between the separator outlet and the alarm device.
4. Unmount the old alarm unit.

This preparation ensures the mounting surface and wiring is ready for the Bilgmon 488.

4. Installing the Bilgmon 488 (Step-by-Step)

Step 1: Mount the Unit

• Position the Bilgmon 488 where the previous 15 ppm alarm was installed.
• Fasten the compact unit securely using the mounting holes on the casing.

Step 2: Connect the Piping

• Fit the new piping to the inlet and outlet connections of the Bilgmon 488.
• The device is designed to retrofit any type or model of OWS, so no structural modifications are needed.

Step 3: Electrical Connections

1. Connect the power supply:
• 24 V version or
• 115/230 V version, depending on the model ordered.
2. Connect alarm and control signals to the appropriate terminals.
3. If your Automatic Stopping Device (ASD) uses a solenoid valve with high current draw:
• The Bilgmon 488 alarm relay outputs include electronic fuses rated at 0.25 A.
• If the solenoid exceeds this limit, install an external relay between the Bilgmon 488 alarm output and the ASD.

Step 4: Power Up and Test

• Restore power to the system.
• Verify that the Bilgmon 488 initializes normally.
• Confirm alarm functionality with the vessel’s control system.

Installation is complete.

5. Replacing or Recalibrating the Measuring Cell

The Bilgmon 488 is designed for quick recalibration via cell replacement:

• Crew can replace the measuring cell in approximately 5 minutes.
• No external calibration service is required.
• This reduces downtime and ensures continuous environmental compliance.

Spare measuring cells are IN STOCK.

6. Battery Replacement (RTC Backup Battery)

If you encounter an RTC-related alarm:

1. Open the master unit lid.
2. Locate the CR1225 battery on the backside of the lid.
3. Replace the battery carefully.
4. Close the unit and verify the RTC resumes normal operation.

Because of the backup capacitor, the RTC can maintain timing for a few hours even without the battery installed.

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