Lennox ML180UHV Series

©
2019 Lennox Industries Inc.
Dallas, Texas, USA
507946-01
08/2019
ML180UHV
SERIES
GAS FURNACE
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the
gas supplier.
WARNING
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any
other appliance.
Installation and service must be performed
by a qualied installer, service agency or the
gas supplier.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Leave the building immediately
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re
department.
USER’S INFORMATION
MANUAL

Lennox ML180UHV Series Specifications

General

Model	ML180UHV Series
Type	Gas Furnace
AFUE Rating	80%
Stages	Single-stage
Ignition Type	Hot Surface Ignition
Cabinet Type	Upflow/Horizontal
Heat Exchanger Material	Aluminized Steel
Fuel Type	Natural Gas
Warranty	5-Year Limited Parts, 10-Year Heat Exchanger
Dimensions	17.5 inches

Summary

ML180 UHV Parts Identification

Safety Instructions

General Safety Precautions

Handling mechanical equipment, keeping area clear, airflow, chemical storage, and return air usage.

Asphyxiation and CO Hazard

Ensuring leak-free exhaust vent, annual inspection, and carbon monoxide detector recommendations.

Explosion Hazard - LP Gas

Warning about LP/propane gas leaks, odorant loss, and the use of leak detectors.

Start-Up & Operation Information

Operating the Gas Valve

Step-by-step instructions for safely operating the gas valve on the furnace.

Turning Off Gas to the Unit

Procedure for safely shutting off the gas supply to the furnace for service.

Filters and Maintenance

Filter Information and Replacement

Details on furnace filters, recommended sizes, and replacement guidelines.

Furnace Maintenance Procedures

Annual inspection and cleaning of furnace components by a qualified technician.

Blower Maintenance

Instructions for checking and cleaning the blower wheel for optimal performance.

Service Troubleshooting Checklist

Common checks to perform before calling a service technician for issues.

Safety Precautions and Planned Service

Unit Safety Checks and Indicators

Identifying potential problems through sounds, odors, and visible signs of malfunction.

Flood Damage Warning

Critical warning against using flood-damaged furnaces due to extreme safety risks.

Annual Furnace Maintenance Schedule

Detailed checklist for seasonal professional inspection and service requirements.

System Test and Operation Check

Performing general system tests and verifying operating parameters for functionality.

Repair Parts List