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General| Type | Zone Control System |
|---|---|
| Manufacturer | Lennox |
| Compatibility | Lennox HVAC Systems |
| Zones Supported | Up to 4 zones |
| Power Requirements | 24 VAC |
| Warranty | 5-year limited warranty |
| Control Type | Electronic |
| Thermostat Compatibility | Works with standard thermostats |
| Features | system monitoring |
| Communication | Wired |
Diagram illustrating the field wiring for the Harmony II Residential Zone Control System.
Detailed physical dimensions and views of the Harmony II Control Panel.
Detailed physical dimensions and views of the Harmony II Control Center.
List of recommended thermostats for gas heat/condensing unit systems.
Selection guide for round and rectangular zone dampers.
List of recommended thermostats for heat pump systems.
Selection guide for round and rectangular zone dampers.
Recommended thermostats for gas heat/heat pump systems with FM21.
Selection guide for round and rectangular zone dampers.
Overview of the Harmony II Control Panel and Control Center.
Description of thermostats, dampers, probes, switches, and modules.
Guidelines for grouping rooms into zones based on structure, climate, and occupancy.
Information on designing duct systems for the Harmony II Zone Control System.
Illustration of a reduced radial duct design for zone control.
Illustration of an extended plenum duct design for zone control.
Installation details for gas furnace and condensing unit systems.
Installation details for blower coil and heat pump systems.
Installation details for gas furnace, heat pump, and FM21 control systems.
Installation guidance for the Harmony II Control Panel.
Guidelines for installing the Harmony II Control Center.
Recommendations for thermostat types and placement.
Information on installing motorized dampers and transformers.
Guidelines for locating and installing the discharge air temperature probe.
Requirements for installing the pressure switch for heat pump systems.
Adjusting blower speed using jumper settings on the VSP2-1 board.
Adjusting blower speed using jumper settings on the BDC3 board.
Diagram showing terminal connections for the Harmony II Control Center.
Setting air volume for each zone using CFM selection jumpers.
Adjusting blower speed for continuous fan mode.
Reducing blower speed during heating mode.
Calculating total available CFM based on zone settings.
Selecting indoor unit type based on installed system.
Setting outdoor unit jumper based on unit speed.
Adjusting discharge air temperature setpoints.
General wiring for system components.
Connecting the control panel to the control center.
Wiring the discharge air temperature probe to the control center.
Wiring thermostats for Option 1 systems.
Wiring thermostats for Options 2 and 3 systems.
Wiring the pressure switch to the control center.
Wiring gas furnaces for Options 1 and 3.
Installing and wiring the temperature modulation switch.
Wiring details for condensing units.
Wiring details for CB31 Series Blower Coil units.
Wiring details for Lennox Heat Pump units.
Wiring details for the FM21 control system.
Wiring details for economizer applications.
Field wiring for Option 1 with economizer.
Field wiring for Option 2 with economizer.
How the control center interprets zone thermostat inputs.
System response to control panel mode selections.
Control of the indoor blower via the control panel.
Indicates outdoor unit requires service.
Operation during emergency heat mode.
Operation of the control panel in Cool, Heat, and Auto modes.
System response to Auto Changeover mode.
Operating the control panel in Zone, Central, and System Off modes.
Operation of the fan in Auto and On modes.
Interpretation of LEDs on the control panel.
Overview of control center LEDs for status and troubleshooting.
Functions of the diagnostic/bypass button.
Reading stored error codes using the diagnostic button.
Bypassing time delays using the diagnostic button.
Displaying control panel status using the diagnostic button.
Time delay for blower off after gas heat operation.
Delay for compressor speed changes.
Delay before compressor can cycle off.
Delay for heat staging in electric heat.
Delay for auto-changeover mode with opposing demands.
Initial steps for powering up the system.
Startup procedure for gas heat systems.
Checkout for single zone gas heating operation.
Checkout procedure for multiple zone gas heating.
Checkout procedure for central control gas heating.
Checkout for single zone heat pump heating.
Checkout for multiple zone heat pump heating.
Checkout for central control heat pump heating.
Heating procedure for FM21 systems above balance point.
Heating procedure for FM21 systems below balance point.
Operation of zone control during cooling mode.
Operation of central control during cooling mode.
Procedure for turning the entire system off.
How to check the discharge air temperature probe's operation.
Using diagnostic LEDs for system troubleshooting.
Interpreting LED patterns to identify error conditions.
