Riello Burner: Two-Pipe Setup & Reset

Understanding and maintaining your Riello burner is crucial for efficient and reliable heating. This guide will walk you through two common operational aspects: configuring the burner for a two-pipe system and performing a reset when it locks out on safety. By following these steps, you can ensure your burner operates smoothly and address minor issues promptly.

Setting Up a Two-Pipe System

Many heating systems benefit from a two-pipe configuration for the oil pump. While your Riello pump is designed for single-pipe operation, adapting it for a two-pipe setup is straightforward. This configuration can offer advantages in terms of fuel delivery and system performance. Here’s how to achieve it:

Essential Steps for Two-Pipe Conversion:

1. Locate the Return Plug: Identify the return plug, often labelled with the number '2' in the system's diagrams.
2. Unscrew the Return Plug: Carefully unscrew this plug. This action opens the path for oil to return to the tank.
3. Install the By-Pass Screw: Next, you'll need to insert and screw in the by-pass screw. This component is typically labelled as '3'. This screw regulates the flow and ensures the pump operates correctly in a two-pipe configuration.
4. Re-secure the Plug: Once the by-pass screw is in place, screw the return plug (2) back into its original position. This completes the physical adaptation of the pump.

Important Pre-Start Checks for Two-Pipe Systems:

Before igniting the burner after converting to a two-pipe system, a critical check is necessary to prevent operational issues. You must ensure that the return pipe-line is not obstructed or clogged. A blocked return line can lead to improper fuel flow, potentially causing the burner to malfunction or fail to start. Verify that the return pipe is clear and allows for unobstructed oil flow back to the tank.

Understanding and Performing a Burner Reset

It's not uncommon for oil burners to temporarily lock out on safety due to various reasons, such as a brief interruption in fuel supply or ignition issues. Riello burners are equipped with a safety lockout feature and an easy-to-use reset mechanism.

How to Identify a Safety Lockout:

When your Riello burner locks out on safety, a visual indicator will be present. Look for a light that illuminates behind the re-set button. This light serves as a clear signal that the burner has entered its safety mode and requires intervention before it can restart.

Performing the Reset:

Resetting your Riello burner is a simple process designed for user convenience:

1. Locate the Re-set Button: As indicated, this button will have a light behind it when the burner is locked out. Refer to Figure 2 in your burner’s manual for precise location if needed.
2. Press the Re-set Button: Firmly press the re-set button. This action signals the burner's control system to clear the fault condition and attempt to restart the ignition sequence.

When to Call for Professional Assistance:

While the reset function is straightforward, it's important to understand its limitations. If the burner locks out on safety and, after pressing the re-set button, it continues to lock out repeatedly, this indicates a more persistent issue that requires expert attention. In such scenarios, you should immediately contact your Authorized RIELLO Dealer for assistance. It is crucial to note that there are no user-serviceable parts located within the red cover of the burner. Attempting internal repairs yourself could void your warranty and potentially cause further damage.

Troubleshooting Common Issues

Understanding these operational procedures can help you maintain your Riello burner effectively. For instance, a consistent need to reset the burner might point to issues with the oil filter, the ignition transformer, or even air in the fuel line. If you've converted to a two-pipe system and are experiencing problems, double-checking the return line for blockages is a primary troubleshooting step.

Comparison: Single-Pipe vs. Two-Pipe Systems

The choice between a single-pipe and a two-pipe system for your oil pump can impact performance and maintenance. Here’s a brief comparison:

Frequently Asked Questions

Q1: Why would my Riello burner lock out on safety?

A: Common reasons include a lack of oil, air in the oil line, a dirty oil filter, ignition problems, or a malfunctioning safety switch. The reset button is a temporary fix; persistent lockouts indicate an underlying issue that needs professional diagnosis.

Q2: What is the purpose of the by-pass screw in a two-pipe system?

A: The by-pass screw allows excess oil, which is not needed for combustion, to be returned directly to the oil tank via the return line. This prevents the pump from dead-heading (building up excessive pressure when the system is closed) and ensures a consistent fuel supply to the burner.

Q3: Can I convert my burner from single-pipe to two-pipe myself?

A: Yes, as outlined in this guide, the conversion is generally straightforward. However, ensure you follow the steps precisely and always perform the pre-start check of the return line. If you are unsure at any point, consult a qualified technician.

Q4: How often should I service my Riello burner?

A: It is recommended to have your Riello burner serviced annually by a qualified professional. Regular servicing, including cleaning and filter replacement, helps prevent lockouts and ensures efficient operation.

Q5: What does it mean if the reset light stays on after pressing it?

A: If the reset light remains illuminated after you press it, it means the safety fault has not been cleared. This strongly suggests a persistent problem that requires immediate attention from an authorized service technician. Do not continue to press the reset button repeatedly.

By understanding these operational procedures and performing regular maintenance, you can keep your Riello burner running efficiently and reliably. Always refer to your specific burner model's manual for detailed instructions and safety precautions.