Bryant 580F Heating, Units without EconoMi$er+, Cooling, Units with EconoMi$er+

Page 46

while the unit is in cooling. When the thermostat is satisfied, C is deenergized and the compressor and OFM shut off. After a 30-second delay, the (IFM) shuts off. If the thermostat fan selector switch is in the ON position, the evaporator motor will run continuously.

B. Heating, Units without EconoMi$er+

When the thermostat calls for heating, terminal W1 is ener- gized. The induced-draft motor is energized and the burner ignition sequence begins. The indoor (evaporator) fan motor (IFM) is energized 45 seconds after a flame is ignited. When additional heat is needed, W2 is energized and the high-fire solenoid on the main gas valve (MGV) is energized. When the thermostat is satisfied and W1 is deenergized, the IFM stops after a 45-second time-off delay.

C. Cooling, Units with EconoMi$er+

For EconoMi$er+ operation, there must be a thermostat call for the fan (G). This will move the damper to its minimum position.

When the EconoMi$er+ control is the occupied mode and a call for cooling exists (Y1 on the thermostat), the control will first check for indoor fan operation. If the fan is not on, then cooling will not be activated. If the fan is on, then the control will open the EconoMi$er+ damper to the minimum position.

On the initial power to the EconoMi$er+ board, it will take the damper up to 21/2 minutes before it begins to position itself. With subsequent fan signal (G) to the board, the changed in damper position will take up to 30 seconds to ini- tiate. Damper movement from full closed to full open (or vice versa) will take 21/2 minutes.

If the damper is in the process of a change (for example going to 100% open) and the signal (G) is turned off, the damper will continue to open to 100% before it closes (due to no fan signal [G]).

If free cooling can be used as determined from the appropri- ate changeover command (switch, dry bulb, enthalpy curve, differential dry bulb, or differential enthalpy), then the con- trol will modulate the dampers open to main the supply air temperature set point plus 2° F.

If there is a further demand for cooling (cooling second stage

—Y2 is energized), then the control set point for the leaving air will be set at the supply air set point to increase the cool- ing capacity. If this cannot satisfy the load then the control will bring on compressor stages as needed to maintain the supply air temperature set point. The EconoMi$er+ damper will be locked open at 100% or the maximum damper posi- tion set point.

To ensure that there is oil return, the compressors will operate for at least 3 minutes. If, during this period, the leav- ing temperature drops below the set point by 5 F, then the EconoMi$er+ dampers will be closed to 60% until the com- pressor is turned off to avoid cold leaving air temperatures.

If the conditions are not suitable for free cooling then the EconoMi$er+ dampers will be closed to the minimum venti- lation position.

Compressor stages will be used to cool the air. If the control is configured for direct control by Y1 and Y2, then the stages will sequence based on the demand of Y1 and Y2. If the control is configured for leaving air temperature control, then Y1 will maintain the leaving air temperature at the supply air set point plus 2° F. If Y1 and Y2 are closed, then the leaving air will be controlled to the supply air set point. If Y2 is closed and Y1 is open, then control will shut down and indicate an error due to a thermostat failure or improper wiring of the thermostat.

If the unit is in the unoccupied mode, then the control of the temperature will depend on the unoccupied free cooling configuration: no unoccupied cooling, unoccupied free cooling with any mechanical cooling, or unoccupied free and mechanical cooling. If free cooling is enabled, then the con- trol will check if free cooling can be used. The EconoMi$er+ will then control to the leaving air temperature set point plus 2 F for a Y1 command, or the leaving air temperature set point for a Y1 and Y2 command. If mechanical cooling is allowed to be used, then the control will then bring on addi- tional stages of mechanical cooling if free cooling cannot sat- isfy the load.

If the EconoMi$er+ control:

•is in the occupied mode

•is configured to use demand ventilation

•cannot use free cooling

•has return air or space CO2 levels below the DAQLO limit,

then the EconoMi$er+ damper position will be set to the IAQMIN_SP set point. If the CO2 level rises above the DAQLO limit, then the dampers will modulate open in a lin- ear relationship until the return air or space CO2 levels are at or above the DAQHIGH limit. The damper position will be at the ECONOMIN_SP set point.

When the EconoMi$er+ is being used for free cooling and the position exceeds the power exhaust set point, then the con- trol will turn on the appropriate power exhaust fans. Refer to Fig. 23 for barometric relief capacity, Fig. 24 for outdoor air leakage, and Fig. 25 for pressure drop.

Unoccupied and Occupied Minimum Position Control

There is an unoccupied minimum damper position and an occupied minimum damper position on the EconoMi$er+ controller. When the HVAC fan is off the outdoor air damper will always be closed. When the fan is on and in the unoccu- pied mode, the outdoor air damper will be at the unoccupied minimum position. When the fan is on (G call) and in the occupied mode, the outdoor air damper will be at the occu- pied minimum position.

A jumper wire is factory-installed to force the unit into occupied configuration whenever G or Y1 are closed. Without the jumper wire, the unit will always be in unoccupied mode.

The 2 minimum position settings are also used in the IAQ sequence of operation. See Indoor Air Quality Sensor on page 18.

NOTE: The minimum position signal takes priority over the maximum position signal. If the maximum damper position is set below the minimum damper position, the EconoMi$er+ controller will maintain the actuator at minimum position.

Adjust the unoccupied minimum position to allow the mini- mum amount of outdoor air, as required by local codes, to enter the building. Make minimum position adjustments with at least 10 F (6 C) temperature difference between the outdoor and return air temperatures.

To determine the unoccupied minimum position setting, per- form the following procedure:

Calculate the appropriate supply-air temperature using the following formula: (TO x OA) + (TR x RA) = TM

TO = Outdoor-Air Temperature

OA = Percent of Outdoor Air

TR = Return-Air Temperature

RA = Percent of Return Air

TM = Supply-Air Temperature

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Contents Safety Considerations Important Read Before InstallingContents InstallationBase Unit Dimensions 580F036-072 Base Unit Dimensions 580F073 II. Field Fabricate Ductwork III. Install External Trap for CONDEN- Sate DrainAlternate Unit Support IV. RIG and Place UnitPKG. Accy Hole Power Unit Size Accessory CRRFCURB001A01Connector ALT Accessory Drain GAS CRRFCURB002A01Install Flue Hood VI. Install GAS PipingUnit 580F MAX Weight Rigging DetailsPhysical Data OUTDOOR-AIR Inlet Screens Furnace SectionFreeze Protection Thermostat F RETURN-AIR FiltersHeat Anticipator Settings Field Power SupplyField Control Wiring VII. Make Electrical ConnectionsPower Wiring Connections Electrical Data Without Convenience Outlet RLA LRA FLA MCA MOCP†Electrical Data With Convenience Outlet VIII. Adjust FACTORY-INSTALLED Options Manual Outdoor-Air DamperHood BOX Optional EconoMi$er+Bracket OAT OarhIAQ IarhDamper Movement EconoMi$er+ Controller WiringThermostats Supply Air Temperature SAT Sensor Provided EconoMi$er+ Field-Installed AccessoriesOutdoor Air Temperature OAT Sensor Provided Return Air Temperature RAT SensorIndoor Air Quality Voltage Setting Outdoor Air Humidity SensorTemperature Resistance Range ResolutionEnthalpy Changeover Settings Remote EconoMi$er+ Enable Control Occupied/Unoccupied SwitchPower Exhaust Indoor Air Humidity SensorVentilation Rate CO2 Sensor ConfigurationFull Occupancy Ventilation for PeopleDirect-Drive Motors IX. Adjust EVAPORATOR-FAN SpeedBelt-Drive Motors Fan Rpm at Motor Pulley Settings Motor Data870 External Static Pressure in. wg Cfm Rpm Bhp Watts 900768 9581181 970 External Static Pressure in. wg Cfm Rpm Bhp Watts955 1073802 370 Low Speed840 432 773 802 370 912 489624 935757 967 579663 856884 Airflow Low Speed High SpeedBhp Watts 900 941762 886 517 969 644 859 458 944 579705 777866 479 790 353828 413 790 353 896 470 990 599905 553 1000 687 1085 831 828 413 930 535 1021 669866 479 964 607 1053 746 944 635 1036 775 1119 924986 771867 966PRE-START-UP IV Internal WiringVI. Refrigerant Service Ports START-UP Unit PreparationMain Burners IX. CoolingXI. Heating XIII. Ventilation Continuous FAN XII. Safety ReliefXIV. ECONOMI$ER+ Controller Thermostat Inputs DS1 DS2 DS3 DS4Input Name Type USE INPUT/OUTPUT Conversion Connection PIN Economizer MotorConfiguration Variables Read and Setup Modes Start-Up Mode SequenceInput/Output Channels Setup Mode Error Mode Manual ModeXV. ECONOMI$ER+ Configuration Compressor Configuration and Control Ventilation Air and Free CoolingXVI. Operating Sequence Demand Ventilation ConfigurationPower Exhaust Configuration Cooling, Units without EconoMi$er+Heating, Units without EconoMi$er+ Cooling, Units with EconoMi$er+Service Cleaning II. Lubrication III. Blower Belt AdjustmentECONOMI$ER+ Adjustment IV. Manual OUTDOOR-AIR DamperXIV. Loss of Charge Switch Limit SwitchXIII. HIGH-PRESSURE Switch XVI. Replacement PartsSuction Line Pressure Kilopascals Suction Line Temperature DEG. CSuction Line Temperature DEG. F Suction Line Pressure PsigTON Unit 60 Hz Charging Chart Burner Section Details Troubleshooting ECONOMI$ER+ Troubleshooting II. Unit Troubleshooting Error Code 8 E2 Test FailureUnit Always in Unoccupied Mode RAM Test FailureLED Error Code Service Analysis Heating Service AnalysisCooling Service Analysis GVR FPTGND HPSStartup Mode Appendix a ECONOMI$ER+ LabelAppendix a ECONOMI$ER+ Label Appendix B JOB Specific ECONOMI$ER+ Configuration Settings Index Service Training Call for Free CatalogPage Preliminary Information START-UP ChecklistTemperatures III. START-UP Electrical
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580F specifications

The Bryant 580F is a highly regarded gas furnace known for its exceptional heating performance and advanced technology. Designed for residential use, this model stands out for its reliability, efficiency, and user-friendly features that cater to modern heating demands.

One of the most notable features of the Bryant 580F is its efficiency rating. With an AFUE (Annual Fuel Utilization Efficiency) rating of up to 95%, this furnace maximizes heat output while minimizing energy consumption. This high level of efficiency not only results in lower utility bills but also reduces the environmental impact—a critical consideration for today’s eco-conscious homeowners.

The Bryant 580F is equipped with a multi-speed blower that ensures consistent airflow and enhances comfort by maintaining even temperatures throughout the home. This technology allows the furnace to adjust its operation based on the heating needs, leading to quieter operation and increased comfort levels.

In terms of construction, the Bryant 580F is built with durable materials that promise longevity and resilience against wear and tear. Its compact design makes installation easier, allowing it to fit into tight spaces without compromising its performance.

One of the standout technologies integrated into the Bryant 580F is its enhanced control system. The furnace works seamlessly with smart thermostats, allowing homeowners to monitor and adjust heating settings from their mobile devices. This feature not only provides convenience but also allows for energy-saving optimizations based on personal schedules and preferences.

Safety is also a primary concern with the Bryant 580F. It includes robust safety features such as a hot surface ignition system that eliminates the need for a standing pilot light, reducing the risk of gas leaks. Additionally, advanced diagnostics help in troubleshooting and maintenance, ensuring that potential issues can be identified and resolved quickly.

In conclusion, the Bryant 580F gas furnace is a remarkable choice for those seeking a blend of efficiency, comfort, and advanced technology. Its high AFUE rating, multi-speed blower, smart control compatibility, and safety features make it a reliable option for homeowners looking to invest in a dependable heating solution. As the demand for energy-efficient heating continues to grow, the Bryant 580F stands out as a model that meets and exceeds expectations in the modern heating landscape.
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