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.
![]() |
Lochinvar Gas Water Heater Specifications - ATHR-199M 1** / LTHR-199X3 1** Comprehensive specifications for Lochinvar's ENERGY STAR Certified Gas Water Heaters, models ATHR-199M 1** and LTHR-199X3 1**. Details include performance metrics, dimensions, fuel type, and certification information. |
![]() |
Lochinvar Commercial Gas Water Heaters: Condensing High Efficiency Models An overview of Lochinvar's LCT-199 series of commercial gas tankless water heaters, detailing their condensing high efficiency technology, Ultra-Low NOx features, durable heat exchangers, performance specifications, and model details for indoor and outdoor installations. |
![]() |
Lochinvar Tankless X3 Condensing High Efficiency Water Heaters Discover the Lochinvar Tankless X3 Condensing High Efficiency Water Heaters, featuring X3 Scale Prevention Technology for extended lifespan and optimal performance. Explore indoor and outdoor models with detailed specifications, dimensions, and performance charts. |
![]() |
Lochinvar EcoShield High Efficiency Gas Fired Condensing Water Heater User & SMART SYSTEM Control Guide This document provides a comprehensive user and control guide for the Lochinvar EcoShield range of High Efficiency Gas Fired Condensing Water Heaters, covering operation, settings, error codes, and technical specifications. |
![]() |
Lochinvar Armor Condensing Commercial Gas Water Heaters Lochinvar's ARMOR Commercial Condensing Water Heater offers 98% thermal efficiency with advanced features like SMART TOUCH control and CON-X-US remote connectivity. Available in five models from 1.25 to 4.0M BTU/hr, it boasts a 5:1 turndown ratio and direct-vent flexibility up to 150 feet. Suitable for indoor and outdoor installations in warm climates. |
![]() |
Lochinvar TTW Series: Gas Fired Condensing Water Heater Installation & Maintenance Manual Comprehensive installation, commissioning, user, and maintenance guide for Lochinvar TTW410 and TTW580 floor-standing gas-fired condensing circulating type water heaters. Features technical data, safety guidelines, and operational procedures. |
![]() |
Lochinvar EnergyRite Pool & Spa Heater: High Performance & Efficiency Discover the Lochinvar EnergyRite pool and spa heater, designed for residential and light commercial use. Features include a commercial-grade heat exchanger, service-friendly controls, and Low-NOx emissions for efficient and environmentally conscious heating. |
![]() |
Lochinvar Energy Saver Residential Gas Water Heaters - Submittal Sheet and Specifications Detailed submittal sheet and specifications for Lochinvar Energy Saver Residential Gas Water Heaters, covering standard features, optional equipment, dimensions, and model-specific data for efficient water heating. |