Overview
This document provides comprehensive installation instructions for the Lennox ML296UHV Merit Series Gas Furnace. It details the procedures for setting up the unit for both upflow and horizontal air discharge configurations.
Key Features & Models
The ML296UHV is a Category IV gas furnace designed for natural gas applications, with an optional conversion kit for propane/LP gas. It supports direct vent or non-direct vent installations.
Available models include:
- ML296UH045XV36B
- ML296UH070XV36B
- ML296UH090XV48C
- ML296UH110XV60C
Safety First
Crucial safety warnings are emphasized throughout the manual, including precautions against improper installation, potential explosion hazards with LP gas, and the importance of adequate combustion air. Installation and service must be performed by qualified professionals.
Installation Requirements
The manual covers essential installation aspects:
- Venting Practices: Detailed guidance on direct and non-direct vent configurations, including pipe sizing and termination clearances.
- Gas Piping: Specifications for gas supply, connections, pressure testing, and leak detection.
- Electrical: Requirements for power supply, grounding, wiring, and thermostat connections, emphasizing ESD precautions.
- Duct System: Guidelines for sizing and installing supply and return air duct systems.
- Location: Considerations for installation sites, clearances, and protection from environmental factors.
Operation & Maintenance
Information on unit start-up, including priming the condensate trap, gas valve operation, and troubleshooting common issues. It also outlines annual maintenance checks to ensure optimal performance and longevity.
Compliance
The ML296UHV units are CSA International certified to ANSI Z21.47 and CSA 2.3 standards. Installation must comply with all applicable local building codes and national standards such as the National Fuel Gas Code (ANSI-Z223.1/NFPA 54) in the USA and CSA-B149 codes in Canada.
