Lennox Hearth Harmony IIR Zone Control System 502 User's Manual
Contents
1. supplying conditioned air The blower will cycle on and off fan will keep running in this mode until the Fan Auto button is according to the demand for heating or cooling By cycling on pressed Fan On tends to mix the air from different zones and effi and off air from different zones is not mixed and better effi ciency may suffer if Fan On option is used on a regular basis ciencies are achieved Page 3 Harmony lle Zone Control System Record which rooms are zoned together Lennox Dealer Contact Telephone Number Installation Date Page 42. What Is the Harmony II Zone Control System Lennox Harmony II 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 II 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 the brains of the Harmony II system It organizes the operations of the thermostats dampers and HVAC equipment to result in total com fort The Harmony II system operates with any of the following HVAC system combinations Option 1 Pulse211m V series gas furnace and either a single or two speed condensing unit Option 2 CB21 series blower coil unit and either a Lennox single or two speed heat pump or Option 3 Pulse21 V series gas furnace a Lennox heat pump and the FM21 control Harmony II zone con trol s
3. cupied 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 502 862M Harmony II User s Manual Page 1 02 2000 Using the Harmony lle Control Panel The Harmony II 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 II 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 II 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 II 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 ata time The Heat selection tells the control center that it should provide heat to the zones
4. e 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 Page 2 To Operate Harmony II control Choose either Central or Zone mode Central Mode Heating and cooling to all zones 1 Press Central button on control panel 2 Choose either Heat or Cool or Auto button on control panel 3 Choose either Fan Auto or Fan On button on control panel The Fan switch on all thermostats will be inoperable The fan is controlled at the control panel 4 Set the zone 1 master thermostat at the same position HEAT or COOL or AUTO as the control panel If your thermostat system does not have an auto changeover selection set the control panel in AUTO and the zone 1 thermostat in either HEAT or COOL Do not adjust other zone thermostats since they are non functional in Central mode 5 Set thermostat to desired room temperature Zone Mode Heating and cooling to specific zones 1 Press Zone button on control panel 2 Choose either Heat or Cool or Auto button on control panel 3 Choose either Fan Auto or Fan On button on control panel The Fan switch on all thermostat will be inoperable The fan is controlled at the control panel 4 Set each zone thermostat at the sam
5. e position HEAT or COOL or AUTO as the control panel If your thermostats do not have an auto changeover selection set the control panel in AUTO and the zone thermostats in either HEAT or COOL 5 Set thermostats to desired room temperature Harmony lle Control Panel Press Zone for specific zones to Press Central for all zones receive conditioned air upon to be conditioned at the each zone s need same time Press Cool to allow cooling only For Central mode Zone 1 thermo stat should also be set at Cool For Zone mode all thermostats should also be set at Cool Z yA System Off button turns off Harmony II control Press Heat to allow heating only For Central mode Zone 1 thermo stat should also be set at Heat For Zone mode all thermostats should also be set at Heat Press Auto to allow either cooling or heating depending on the need For Central mode Zone 1 thermostat should also be set at Auto For Zone mode all thermostats should also be set at Auto If your thermostats are not equipped with an Auto setting place control panel in Auto and ther mostats in either Heat or Cool Red service light flashes from be hind the control panel cover when system requires service Error codes will be stored in control center for readout by technician only Press Fan Auto to allow blower to run only while system is Press Fan On to allow blower to run continuously to circulate air The
6. 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 II 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 th
7. ystem 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 oc
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