PCA

Maintenance

6.6 Replacing the Oxygen Sensor

Replace the Oxygen Sensor when it has expired (when the analyzer’s automatic O2 calibration fails and the unit displays the message “O2- Sensor Error”).

NOTE: A "O2-SENSOR ERROR" displayed in the Sensor Status Screen does not necessarily mean that the sensor has expired. Before replacing the sensor, refer to Section 7.2 for other possible causes of the error.

Equipment Required:

•Small Flat Blade Screw Driver

•Oxygen Sensor (Refer to Section 8.0)

Procedure:

1.Remove the analyzer’s rear case and lay it aside (refer to Section 6.2).

2.Remove the Oxygen Sensor connector from the printed circuit board; then carefully pull off the two wires connected to the pins of the sensor (see Figure 6-2).

3.Push in and turn the sensor counterclockwise (watching the notch on top) until it stops; then pull the sensor out of its housing.

4.To install a new sensor, push the sensor into the housing and turn it clockwise until it locks in place.

5.Connect the black (–) and red (+) wires, which were removed from the old sensor in Step 2, to the pins of the new sensor. Be sure to observe polarity as marked on the sensor.

6.Reinstall the sensor connector onto the printed circuit board.

7.Reassemble the analyzer. Then allow the sensor to be connected in the circuit for at least 1 hour before continuing.

8.Place the analyzer in an area of fresh air and turn it ON. After the warmup cycle, observe that the Sensor Status Screen should not show an O2 sensor error.

Instruction 24-9351

6-7

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Bacharach 24-9351 manual Replacing the Oxygen Sensor
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24-9351 specifications

The Bacharach 24-9351 is a cutting-edge combustion analyzer designed for professionals in the HVAC and building maintenance industries. Known for its reliability and precision, this instrument plays a crucial role in ensuring that heating systems operate safely and efficiently.

One of the primary features of the Bacharach 24-9351 is its ability to accurately measure various combustion gases, including carbon monoxide, carbon dioxide, and oxygen levels. This multi-gas measurement capability allows technicians to diagnose combustion problems quickly and effectively, leading to improved system performance and enhanced safety for end users.

The analyzer is equipped with a high-resolution display that provides real-time readings, making it easy for technicians to analyze data on-site. Additionally, the intuitive interface is designed for ease of use, allowing users to navigate through functions and settings without extensive training.

Durability is a key characteristic of the Bacharach 24-9351. It is built to withstand the rigors of fieldwork, with a robust housing that protects it from dust, moisture, and other challenging environmental conditions. This durability is complemented by long battery life, ensuring that users can rely on the device for extended periods without interruption.

In terms of technologies, the Bacharach 24-9351 utilizes advanced sensors that ensure accuracy and repeatability in measurements. Its innovative combustion efficiency calculation provides users with essential insights into the efficiency of their heating systems, allowing for timely adjustments and tuning. This capability not only optimizes performance but also contributes to energy savings and lower operational costs.

Another notable feature is the data logging function, which allows users to store and retrieve measurement data for later analysis. This is particularly beneficial for monitoring system performance over time and making informed decisions regarding maintenance and repairs.

In summary, the Bacharach 24-9351 is an essential tool for HVAC professionals, combining accurate gas measurement, user-friendly design, and robust durability. Its advanced technologies and features make it a valuable asset for ensuring safe, efficient, and effective combustion analysis in various applications. Whether used for routine maintenance or troubleshooting, this analyzer stands out for its reliability and precision.
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