Lennox Harmony III Manual

ZONING
HARMONY III™
Zoning System for Residential, Variable Air Volume
Heating/Cooling Systems
Bulletin No. 210405
August 2015
Supersedes October 2010
FEATURES
EQUIPMENT WARRANTY
Zone Control Panel - Two year limited warranty in
residential applications.
Refer to Lennox Equipment Limited Warranty certicate
included with unit for specic details.
ZONE CONTROL SYSTEM
Harmony III™ Zoning System is capable of controlling
up to four separate zones.
Panel is capable of controlling multi-stage equipment, 2
heat / 2 cool conventional heating/cooling systems and
3 heat / 2 cool heat pump and dual fuel systems.
System consists of the Control Panel, discharge
air sensor (furnished), eld-supplied duct-mounted
motorized zone dampers with a thermostat in each
zone.
Panel is powered by a separate stand-alone
transformer.
Zone dampers are automatically controlled to supply air
ow only to zones with a thermostat demand.
Individual air volumes for heating or cooling are
available to each zone.
Round or rectangular dampers can be used.
Zoning system allows temperature setback in
unoccupied areas while maintaining comfort in occupied
areas.
Auto-changeover control from any zone thermostat or
control heating/cooling mode to all zones from the zone
1 thermostat.
Compatible with standard heat/cool electronic
thermostats (non-power robbing). See recommended
thermostats.
Also compatible with Humiditrol
®
Whole Home
Dehumidication System (with optional Interface Board).
ZONE CONTROL PANEL
Microprocessor controlled panel contains all necessary
relays and controls to operate the system.
Automatic reset in case of operation error or power
failure.
Built-in time delay function (5 minutes) prevents short
cycling of system.
3A (slow-blow) fuse protects panel from shorts in the
thermostat and damper eld wiring. Spare 3A fuse
included.
Cabinet and removable cover constructed of high
impact plastic.
Holes for mounting are furnished and electrical inlets
are provided in cabinet.
Dimensions (H x W x D): 12 x 9-1/2 x 2-1/4 in.
Shipping weight: 2 lbs.
Power requirements: 24VAC (18-30VAC).
Low Voltage Equipment Terminals
• Four zones (dampers) (NC, NO, C)
• Heating/Cooling equipment connections (RC, RH, Y1,
Y2, O, G, W1, W2, W3, DS, W1 - Def)
PRODUCT SPECIFICATIONS

Lennox Harmony III Specifications

General

Brand	Lennox
Model	Harmony III
Category	Control Systems
Language	English