Lennox Harmony III User Manual

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8.6. How do I use the Zone Mode? ...........................................................................78
8.7. How are Zones Determined? .............................................................................78
8.8. How do I use the Optional Humiditrol
®
DehumidicationAccessory? ................78
8.9. Enabling and Disabling Humiditrol Setting in Thermostat ..................................78
8.10. Humiditrol User Adjustment is also available under the User Settings.............78
8.11. Owner Reminder! ............................................................................................78
8.12. Thermostat replacement ..................................................................................78
8.13. Maintenance ..................................................................................................... 78
8.14. Homeowners Zone Information Record ...........................................................79
1. General
1.1. Shipping and Packing List
Table 1. Packing List
Quantity Description
1 Harmony III zoning system unit
1 Discharge Air Sensor
1 Installation Instruction
1 Warranty (W-031-L2-02)
1.2. Acronyms Used
Table 2. Acronyms
Acronym Description
AC Air Conditioner
CFM Cubic Feet per Minute
DAS Discharge Air Sensor
DF Down Flow
EDA EnhancedDehumidicationAccessory
HZA Humiditrol Zoning Accessory Kit
IFC Integrated Furnace Control
PIAB Percentage into Adjustment Band
PWM Pulse Width Modulated
UH Up Flow
VSM Variable Speed Motor
1.3. Additional Parts Required
Table 3. Additional Parts
Quantity Description
Application
specic
Transformer
Dampers
Thermostats
Balance Point Sensor kit (10Z23)
Pressure switch (For Heat Pump Option): HFC-22 (27W12); HFC-410A (27W13
Tee for vapor line High Pressure Switch (87071)
Defrost Tempering Kit (67M41)
Humiditrol
®
EnhancedDehumidicationAccessory(EDA),EDA-024B(94M41),
EDA-036C (94M42), EDA-060D (94M43)
Humiditrol
®
Zoning Accessory Kit (39W67) (required if Humiditrol
®
EDA, above, is
used)
NOTE: Due to Lennox’ ongoing commitment to quality, features and options are
subject to change without notice and without incurring liability. Improper
installation, adjustment, alteration, service or maintenance can cause
property damage or personal injury. Installation and service must be
performed by a qualied installer and servicing agency.
1.4. Introduction
IMPORTANT
Variable Speed Blower Motor (VSM) technology is required for use with Harmony
III zoning system.
The Lennox Harmony III zoning system manages the distribution of conditioned
airtospecicareasorzonesinahouseorsmallcommercialbuildingbydirecting
heated or cooled air to occupied areas without conditioning unused areas. The
system can be used in the following Lennox HVAC system applications:
Table 4. System Applications
Option Description
1 Variable speed gas furnace used with a 2-stage air conditioner unit. *
2 Variable speed air handler unit (with or without electric heat) used with a 2-stage air
conditioner unit or heat pump. *
3 Variable speed gas furnace used with a 2-stage heat pump (dual fuel).*
*A1-stageairconditionerunit(heatpump)maybeusedunderspeciccircumstancesaslistedin
“Table 8. Lennox AC or Heat Pump Units” on page 7.
Variations on the options described above and included in this document are
cooling-only, hot water coil and cooling system with electric heat applications.
The Harmony III zoning system uses off-the-shelf, single-stage, non-heat pump,
non-power-robbing electronic thermostats and motorized dampers in any of the
applications to control distribution of conditioned air to different zones. This control

Lennox Harmony III Specifications

General

Brand	Lennox
Model	Harmony III
Category	Control Systems
Language	English