What Is the Harmony IIR Zone Control System?
Lennox Harmony IIR Zone Control System manages the distribution of conditioned air to as many as four specific areas or zones in a home or small commercial building. The Harmony IIR control Is an advanced control system that allows a home to be zoned for heating and cooling without the extra expense of pur- chasing two or more HVAC (Heating, Ventilation, and Air Conditioning) systems.
This control allows the owner to heat or cool occupied areas without conditioning unused areas, re- sulting in lower utility bills. This control orchestrates the system components to provide a balanced and comfortable environment.
The system consists of the control panel and the control center. The Harmony II control panel is your link to a comfortable enviroment. The control panel is usually located near the main or master ther-
mostat. The control center is the larger control box and is theR system. It organizes the operations of the thermostats, dampers, and HVAC equipment to result in total com- fort. The Harmony IIR system operates with any of the following HVAC system combinations: Option 1 − Pulse21TM
CB21 series blower coil unit and either a Lennox single− or two− speed heat pump; or Option 3 −
Pulse21R zone con- trol system uses off−the−shelf thermostats and dampers with any of the above systems to distribute conditioned air to zones.
How Are Zones Determined?
Your Lennox dealer has sectioned the rooms of your home or building into zones using the below considerations.
Structural/Architectural Considerations
In multi−level houses using regular HVAC systems, heated air rises to the upper floor(s) causing those rooms become too hot. Zoning will remedy this situation by splitting the conditioned space into two specific zones (first and second floors). The second floor temperature is now controlled by its own ther- mostat, not that of the first floor.
Climate Considerations
Exposure from the sun and weather can produce cold and hot spots in homes that are conditioned with the use of one thermostat. Zoning lessens this by grouping rooms with the same exposure into one zone. Therefore, a room with a northern exposure and a room with a southern exposure should not be zoned together. In the winter, the northern room may be too cool while the southern room may be too hot. In order to keep a balance of conditioned air, the zone must contain rooms with the same weather exposure.
Occupancy Considerations
A single structure contains different types of living spaces. Without zoning, it is difficult to condition all areas so that everyone will be comfortable. Zoning a home or office allows the owner to control the zones which need to be conditioned. Rooms that are used or occupied at the same time are zoned to- gether. Bedrooms which are generally used at night, should not zoned with a living room that is used only during the day or evening.
Harmony II® User’s Manual |
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