Lennox Harmony III User Manual

Lennox Harmony III

80 pages

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HARMONY III™ zoning system (X9953)

Installation, Setup and User Guide

507936-01 6/2021

Supersedes 7/2019

2021

©

Lennox Industries Inc.

Dallas, Texas, USA

Table of Contents

Other manuals for Lennox Harmony III

Installation Instructions60 pages

Homeowner's Manual8 pages

Questions and Answers:

R
Rebecca HubbardJul 27, 2025
How to check if Lennox Control Systems thermostats are wired correctly?
- D
  Daniel OsbornJul 27, 2025
  To check if the thermostats are wired correctly, verify each thermostat for an output signal when it is calling for heating or cooling.
N
Nancy SmithAug 4, 2025
What to do if Lennox Control Systems dampers don't respond to demand?
- D
  Dennis MartinAug 4, 2025
  If the dampers are not responding to demand, check if the dampers drive closed when 24 volts is jumpered to the damper motor.

Lennox Harmony III Specifications

General

Brand	Lennox
Model	Harmony III
Category	Control Systems
Language	English

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