Burner tube misalignment can lead to faults

Important Disclaimer

The information in this bulletin is intended exclusively for licensed heating contractors, and is NOT intended for the end user. This material is NOT intended to take the place of the information contained in the manuals shipped with the product.

Use of this information by unqualified personnel may result in property damage, personal injury or death.

End users are asked to contact a qualified contractor for all installation and service work. If you need assistance finding a contractor in your area, contact your Viessmann Sales Representative, or use our Contractor Locator.

By hitting "Yes" below you confirm that you have read, understood and agree to this warning, that you are licensed and hold the current, appropriate licences to work on said equipment in the location and/or jurisdiction of installation.

Applies to:

◾  Vitodens 100-W, B1HE/B1KE Series (models 85 & 120)
◾  Vitodens 200-W, B2HE Series (models 85 & 120)

Symptoms:

The burner is in a fault state, and a fault code such as "F.380" or "F.381" is displayed on the boiler control. Or the boiler's onboard safety system has initiated a shutdown.

Cause:

After a boiler is serviced, burner tube misalignment between the door pin and the alignment hole in the flame body can lead to fault codes and improper operation. Failure to properly align the door pin and the alignment hole in the flame body and/or failure to seal the gasket may cause improper flame formation, which can result in boiler failure and potential damage to the burner door from excess heat.

Resolution:

Ensure that the burner door pin and alignment hole in the flame body assembly are correctly aligned and installed. See images below for illustrations of these components.

Also, verify that the gasket is properly seated, aligned and sealed.

For detailed instructions, please review the section titled "Checking the Burner Gasket and Flame Body Assembly" in the Service manual for the boiler – see links below:

• Service Instructions for Vitodens 100-W, B1HE/B1KE Series
  
• Service Instructions for Vitodens 200-W, B2HE Series

Illustrations

The image on the left shows a burner door with a properly seated gasket and the door pin highlighted in red. The image on the right shows a flame body assembly with the alignment hole highlighted in red.