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

 

502,862M

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02/2000

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Lennox Hearth 502 user manual How Are Zones Determined?, Structural/Architectural Considerations, Climate Considerations
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502, 862M specifications

The Lennox Hearth 862M,502 is an innovative fireplace insert that combines advanced technologies with aesthetic appeal, making it an ideal choice for homeowners looking to enhance their living space. Known for its efficiency and performance, this model offers a perfect blend of heat output and visual allure.

One of the standout features of the Lennox Hearth 862M,502 is its impressive heating capacity. With the ability to deliver substantial heat output, this fireplace insert can effectively warm large areas of the home, ensuring comfort during the colder months. It offers a remarkable BTU rating, making it suitable for various room sizes while maintaining energy efficiency.

Incorporating advanced combustion technology, the Hearth 862M,502 achieves clean and efficient burning, which significantly reduces emissions. This feature not only benefits the environment but also allows homeowners to comply with stringent emissions regulations that have become prevalent in many areas. The insert’s design promotes optimal air movement within the firebox, which ensures a more complete burn of the wood fuel, translating to more heat generated from less fuel.

The Lennox Hearth 862M,502 is designed with both style and functionality in mind. Its sleek, contemporary appearance complements a wide array of home décors, making it a versatile choice for homeowners. The large glass front allows for an unobstructed view of the fire, creating a warm and inviting ambiance. The insert also comes with customizable options, including various finishes and trim styles, allowing consumers to personalize their fireplace to fit their aesthetics.

Safety features are paramount in the design of the Hearth 862M,502. With a secure faceplate and an efficient venting system, this insert minimizes the risk of drafts and backdrafts, ensuring a safe and comfortable environment. The unit’s construction also adheres to high safety standards, providing peace of mind for families.

Additionally, the Lennox Hearth 862M,502 can be equipped with optional blower kits, enhancing heat distribution throughout the room. The blower helps to circulate warm air quickly, making the heating process more efficient and effective.

In summary, the Lennox Hearth 862M,502 is a reliable, efficient, and stylish choice for homeowners looking to integrate a fireplace insert into their home. Its combination of advanced technology, robust heating capacity, and elegant design make it an exceptional addition to any living space.
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