Lochinvar XCalibur™ Premium Condensing Residential Gas Tankless Water Heaters - Service Handbook

This comprehensive service handbook is provided for qualified persons to ensure the proper installation, operation, and maintenance of Lochinvar XCalibur™ Premium Condensing Residential Gas Tankless Water Heaters.

It offers essential technical details, troubleshooting procedures, and replacement instructions for the following models:

The document covers system basics, safety precautions, operational modes, component data, and detailed troubleshooting steps for error codes and common issues. Adherence to all safety warnings and instructions within this manual is critical.

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