Lennox ML180UHA - User Manual

Page 1
 2018 Lennox Industries Inc.
Dallas, Texas, USA
AIR FLOW
UPFLOW
AIR FLOW
AIR FLOW
HORIZONTAL RIGHT
HORIZONTAL LEFT
Certified by SAI Global
GSCS20254
INSTALLATION
INSTRUCTIONS
ML180UHA
MERIT
®
SERIES GAS FURNACE
UPFLOW / HORIZONTAL AIR DISCHARGE
507407-03
10/2018
Supersedes 507407-02
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
This is a safety alert symbol and should never be ignored.
When you see this symbol on labels or in manuals, be alert
to the potential for personal injury or death.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person
al injury or loss of life. Installation and service must
be performed by a licensed professional HVAC in
staller (or equivalent), service agency or the gas sup
plier.
CAUTION
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
Table of Contents
Unit Dimensions 2................................
ML180UHA Gas Furnace 3.........................
Shipping and Packing List 3........................
Requirements 3...............................
General 4........................................
Combustion, Dilution & Ventilation Air 4..............
Setting Equipment 7...............................
Filters 11..........................................
Duct System 11....................................
Venting 12........................................
Gas Piping 14.....................................
Electrical 16.......................................
Integrated Control 17...............................
Unit Start-Up 19...................................
Gas Pressure Adjustment 20........................
High Altitude 20....................................
Proper Combustion 20..............................
Other Unit Adjustments 21..........................
Service 22........................................
Repair Parts 23...................................
Specifications 24..................................

Lennox ML180UHA Specifications

General

Model	ML180UHA
Efficiency Rating	80% AFUE
Blower Type	Multi-Speed
Warranty	5-Year Limited Warranty on covered components
Stages	Single-Stage
Blower Motor Type	PSC
Heat Exchanger Material	Aluminized Steel
Warranty on Heat Exchanger	20-Year Limited Warranty
Warranty on Covered Components	5-Year Limited
Heating Capacity	44, 000-132, 000 BTU/h
Fuel Type	Natural Gas