Lennox Harmony III

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Table of Contents2
General4
Shipping and Packing List4
Acronyms Used4
Additional Parts Required4
Introduction4
Residential Zone Control System - Overview of Field Wiring5
System Components5
Zone Control System5
Discharge Air Sensor (DAS)6
Thermostats6
Transformers6
Dampers6
Remote Vacation Switch6
Installation Planning and Selecting Heating and Cooling Equipment7
Installation Considerations7
Variable Speed Blower Motor (VSM)7
Selecting/Installing Indoor and Outdoor Units7
Optional Dehumidification Accessories7
Installing Zone Control Components7
Discharge Air Sensor (DAS)7
Zone Control Panel8
Thermostats8
Transformer8
Dampers8
Zone Linking8
Zone Control Panel Jumpers9
Setup for Controlling Equipment Staging and Volume of Air to Zones9
PIAB Jumpers Affect Blower Operation9
Upgrading from Harmony II Zoning System10
Zone 1 PIAB Jumpers - 140ºF das10
Determining PIAB Jumper Settings10
Continuous Air Reduction Jumpers11
Heating Air Reduction Jumpers11
Heat/Cool Staging11
Heating Staging Temperature Jumper11
Cooling Staging Temperature Jumper12
Gas Furnace and Air Conditioning13
Heat Pump with Electric Backup Heat13
Heat Pump - Dual Fuel Heating, 1-Stage or 2 Stage Heat Pump and Gas Furnace13
1.11. Common System Component Wiring13
1.11.1. Dampers and Damper Transformer13
System Configuration/E-Heat Stages)13
1.11.2. Discharge Air Sensor (DAS) Probe14
1.12. Component Specific Wiring14
1.12.1. Zone Control Transformer Phasing14
Thermostat15
1.12.3. Gas Furnace15
Air Conditioner Unit15
Minimum CFM in Variable Speed Furnace and Air Handlers16
1.14. System Flow Diagrams17
Heat Pump18
Installing Heat Pump and Accessories18
Equipment Installation18
Pressure Switch18
Pressure Switch Wiring18
Tee (High Pressure Switch; Heat Pumps Only)18
Balance Point Sensor (Outdoor Thermostat)18
Defrost Tempering Kit19
Variable Speed Motor (VSM) Air Handler and Heat Pump - Option20
(Zoning System)20
Heat Pump System Start-Up and Checkout21
Powering the System (All Systems)21
Checkouts21
Typical Heat Pump Heating Checkout (Single Zone)21
Typical Heat Pump Heating Checkout (Multiple Zone)22
Typical Heat Pump Heating Checkout (Central Mode)23
Heat Pump System Start-Up and Checkout24
Troubleshooting Diagram24
Heat Pump Heating Operation25
Defrost Operations25
Gas Furnace26
Typical Wiring for Variable-Speed Gas Furnace and Outdoor AC Unit - Option 126
Furnace Variable Speed Motor Electrical Adjustments27
Variable Speed Motor Furnace System Operations27
Operation27
Integrated Furnace Control W2 Terminal to Harmony III Zoning System Control28
Installation Setup Worksheets28
SLP98V - Cooling/Heating (Non-Heat Pump Applications)28
SL280V, SL280NV, EL296V and SL297NV - Cooling/Heating (Non-Heat Pump)29
Zone Control Operation in a Gas Furnace System30
Zone Thermostats30
3.3.4.2. Balance Point Setting30
Zone Mode31
Central (Vacation) Mode31
Cooling Operation31
Installation Setup Worksheets for Honeywell 2-Stage IFC Control - Cooling/Heating (Non-Heat Pump)31
Furnace System Start-Up and Checkout33
Start-Up the System (All Models)33
Checkouts33
Typical Gas Heating Checkout (Single Zone)33
Typical Gas Heating Checkout (Multiple Zone)34
Typical Gas Heating Checkout (Central Mode)35
Zoning System with Gas Furnace Troubleshooting - Option 136
Troubleshooting Diagrams36
Gas Heating Operation38
Discharge Air Upper Limit and Differential Temperatures38
Air Handlers39
Variations on Common AC Unit Applications39
Heating/Cooling Equipment Installation39
Air Handler Wiring39
Variations39
Electrical Adjustments40
Communicating Indoor Control40
Non-Communicating Indoor Control40
Installation Worksheets42
Cooling/Heating with Electric Strip Heat (Non-Heat Pump)42
4.2.3.2. Heat Pump - Electric Strip Heat44
Cooling Only or Cooling with Hot Water Coil (Non-Heat Pump)46
Dual Fuel (Option 3)48
Zone Control System Wiring - Option 348
Dual Fuel System Start-Up Defrost Temperating Sensor Placement and Checkout49
Start-Up the System (All Models)49
Defrost Temperating Sensor Placement49
Checkouts50
Typical Dual Fuel Gas Heating (Single Zone)50
Typical Dual Fuel Gas Heating (Multiple Zone)51
Typical Dual Fuel Gas Heating (Central Mode)52
Zoning System with Dual Fuel Troubleshooting - Option 353
Troubleshooting Diagram53
Dual Fuel Operation (below Balance Point)54
Discharge Air Upper Limit and Differential Temperatures54
Dual Fuel Operation (above Balance Point)55
Defrost Operation55
Installation Setup Worksheets56
5.3.6.1. Dual Fuel - Indoor Unit Honeywell 2-Stage Ifc Control And Heat56
Pump56
5.3.6.2. Dual Fuel - SLP98 Variable Capacity and Heat Pump57
Dual Fuel - Variable Speed SL280V, EL296V, SL297NV and Heat Pump58
Troubleshooting59
Operation and Troubleshooting Indicators59
Zone Control Panel Leds59
Fault Recall and Time Delay Override60
Time Delays60
Discharge Air Probe Checkout (All Systems)60
Blower Speed Checkout61
Diagnostic LED Error Codes62
Air Delivered by Blower63
Formulas63
PIAB Calculation Worksheet65
Airflow Data66
User Guide77
What Is the Harmony III™ Zoning System77
What Does the Harmony III™ Zoning System Consist of77
How Do I Set the Control Center Switches77
How Do I Use the Thermostat Controls77
How Do I Use the Central (Vacation) Mode77

Lennox Harmony III

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