Using the Harmony II® Control Panel

The Harmony IIR control panel is where the control center gets its information on how to operate. It works with the thermostats to provide a desired comfort level for each zone. The Harmony II® control panel uses LEDs (light emitting diodes) to display the current operating mode.

The Harmony IIR system operates in either of two modes: Central mode or Zone mode. In Central mode, all zones receive conditioned air at the same time, just like a traditional heating and air condi- tioning system. The master thermostat located in zone 1 controls any heating or cooling need for the entire building. When the Harmony IIR system is placed in Zone mode, specific zones are condi- tioned only when the demand comes from that zone. Notice that each zone, not each room, has its own thermostat. These thermostats only work when the control panel is in Zone Mode. The System Off button will turn off the Harmony IIR control.

The Heat, Cool, and Auto buttons on the control panel tell the control center what type of air to pro- vide and are available in Central and Zone modes. Select one operation (Heat, Cool or Auto) at a time. The Heat selection, tells the control center that it should provide heat to the zones when it is needed. The Cool selection, in turn, tells the control center to provide cool air to the zones when there is a need. The Auto selection is the most flexible choice since it allows either heating or cooling to occur, depending on the need. This selection is particularly nice in times of seasonal changes. For example, in the spring, the temperature is cool in the morning and warm in the afternoon. By placing the control panel and thermostats in Auto, heating will come on in the morning and cooling in the afternoon, if needed.

The Fan Auto and Fan On buttons on the control panel tell the control center how the blower should operate. Select one operation (Fan Auto or Fan On) at a time. Fan Auto allows the blower to cycle on and off with the heating or cooling needs. The Fan On selection allows the blower to run continuous- ly. To stop the blower, press the Fan Auto button.

Service Light

A red LED, visible only when an error occurs, indicates an error condition has been logged in the control center and either the inside unit or zone control system requires service. Alert your Lennox service technician that the Harmony IIR control panel service light is on. Also inform the technician if the light is lit steadily or if it flashes off and on. DO NOT try to diagnose error codes or repair control panel. The control center must be handled by qualified service technicians only. Tampering with con- trol center may result in electrical shock and damage to the control center.

NOTE − The service light located in the master thermostat (heat pumps only) provides a separate function indicating the outdoor unit requires service. The service light in zone 2, zone 3 and zone 4 thermostats is not functional. Call your Lennox service technician if the service light on the zone 1 thermostat is lit.

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Lennox Hearth 862M, 502 user manual Using the Harmony II Control Panel, Service Light
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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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