1. Overview

The Air Pump inside the TSU (TRO Sensor Unit) operates under a regulated pressure controlled by the Air Regulator.

📌 Recommended Pressure:

• 3.0 – 3.5 bar
• If the pressure deviates from this range, follow the adjustment procedure below.

📌 TSU Installation Locations:

• Pump Room
• Engine Room
• Weather Deck
• The exact location can be found in the vessel's BWTS Drawing.
  

2. Air Pump Pressure Adjustment Procedure

Step 1: Check Air Regulator Pressure

1. Locate the Air Regulator connected to the Air Pump inside the TSU.
   
   
2. Check the pressure gauge to verify if the reading is within 3.0 – 3.5 bar.

📌 Why?
Ensuring proper pressure optimizes TRO Sensor performance.

Step 2: Adjust Air Regulator Pressure

1. If the pressure is not within 3.0 – 3.5 bar, lift the top cap of the Air Regulator upward.
   
2. Turn the cap:
   • Counterclockwise ("-") to decrease pressure.
   • Clockwise ("+") to increase pressure.
     
3. Monitor the gauge while adjusting.

📌 Why?
Proper adjustment prevents under or over-pressurization of the Air Pump.

Step 3: Secure the Adjustment

1. Once the pressure is set to 3.0 – 3.5 bar, push the top cap downward to lock the setting.

📌 Why?
This prevents unintentional pressure changes.

3. Summary of Key Actions