Bryant 577D----A installation instructions Check for Refrigerant Leaks, Start-Up Adjustments

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BURNER FLAME

BURNER

MANIFOLD

C99021

 

Fig. 21 - Monoport Burner

 

A

LIMIT SWITCHES

 

--

Normally closed limit switch (LS) completes the control circuit.

--

Should the leaving-air temperature rise above the maximum

577D

allowable temperature, the limit switch

opens and the control

circuit “breaks.” Any interruption in the

control circuit instantly

 

closes the gas valve and stops gas flow to the burners. The blower

 

motor continues to run until LS resets. The furnace board STATUS

 

LED will display STATUS CODE 33.

 

 

When the air temperature at the limit

switch drops to the

low-temperature setting of the limit switch, the switch closes and completes the control circuit. The direct-spark ignition system cycles and the unit returns to normal heating operation.

ROLLOUT SWITCH

The function of the rollout switch is to close the main gas valve in the event of flame rollout. The switch is located above the main burners. When the temperature at the rollout switch reaches the maximum allowable temperature, the control circuit trips, closing the gas valve and stopping gas flow to the burners. The indoor fan motor (IFM) continues to run until switch is reset. The furnace board STATUS LED will display STATUS CODE 33.

CONTINUOUS FAN MODE

When continuous fan operation is requested by the UI indoor fan motor will operate at continuous blower airflow. Continuous fan operation is programmable. See the UI Owner’s Manual for detailed instructions. Terminal EAC-1 is energized as long as the indoor fan motor is energized.

During a call for gas heat, the Evolution control will transition the indoor fan motor to continuous blower airflow or gas heat airflow, whichever is lowest. The indoor fan motor will remain ON until the burners ignite, then shut OFF and remain OFF for the blower-ON delay allowing the heat exchangers to heat up more quickly, then restarts at the end of the blower-ON delay period.

The indoor fan motor will revert to continuous-blower airflow after the gas heating cycle is completed.

When the UI “calls for cooling”, the indoor fan motor will switch to operate at cooling airflow. When the call for cooling is satisfied, the indoor fan motor will operate an additional 90 seconds at cooling airflow before transitioning back to continuous-blower airflow.

When the call for continuous fan is removed, the indoor blower will continue operating for an additional 5 seconds before shutting down, if no other function requires blower motor operation.

COMPONENT TEST

The Evolution Furnace Board features a gas component test system to help diagnose a system problem in the case of a gas component failure. To initiate the component test procedure, ensure that there are no UI inputs to the control (the ABCD connector can be removed from the Evolution control board for this operation) and all time delays have expired. Turn on setup switch SW1-6.

NOTE: The component test feature will not operate if the control is receiving any UI signals or until all time delays have expired.

The component test sequence is as follows:

1.The control turns the inducer motor ON and keeps it ON through step 3.

2.After waiting 10 seconds, the control turns the igniter ON for 15 seconds, then OFF.

3.The control then turns the indoor fan motor on for 15 seconds, then OFF.

4.After shutting the blower motor OFF, the control runs the inducer for 10 seconds, then turns it OFF.

NOTE: The EAC terminals are energized when the blower is operating.

After the component test is completed, one or more status codes (11, 25, or 41) will flash. See component test section or Status Code Label for explanation of status codes.

NOTE: To repeat component test, turn setup switch SW1-6 to OFF and then back ON.

Check for Refrigerant Leaks

Locate and repair refrigerant leaks and charge the unit as follows:

1.Use both high- and low-pressure ports to relieve system pressure and reclaim remaining refrigerant.

2.Repair leak following accepted practices.

NOTE: Install a filter drier whenever the system has been opened for repair.

3.Check system for leaks using an approved method.

4.Evacuate refrigerant system and reclaim refrigerant if no additional leaks are found.

5.Charge unit with Puron (R-410A) refrigerant, using an accurate scale. Refer to unit rating plate for required charge.

Start-Up Adjustments

Complete the required procedures given in the Pre-Start-Up section before starting the unit. Do not jumper any safety devices when operating the unit. Do not operate the unit in cooling mode when the outdoor temperature is below 40°F (4°C) (unless low-ambient operation is enabled in the UI). Do not rapid cycle the compressor. Allow 5 min. between “on” cycles to prevent compressor damage.

CHECKING COOLING AND HEATING CONTROL OPERATION

See UI Installation Instructions for detailed system CHECKOUT. CHECKING AND ADJUSTING REFRIGERANT CHARGE

The refrigerant system is fully charged with Puron (R-410A) refrigerant and is tested and factory sealed.

NOTE: Any adjustment to refrigerant charge must be done with unit operating in HIGH stage.

NOTE: Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper R-410A charge. The charging label and the tables shown refer to system temperatures and pressures in cooling mode only. A refrigerant charging label is attached to the outside of the unit.

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Contents Installation Instructions Table of ContentsSafety Considerations Receiving and InstallationIntroduction Check EquipmentProvide Clearances Rig and Place UnitUNIT/STRUCTURAL Damage Hazard Unit Falling HazardSize CPRFCURB010A00CPRFCURB011A00 CPRFCURB012A00577D--A24-30 Unit Dimensions 577D--A36-60 Unit Dimensions Physical Data Unit 577D--A Physical Data Con’t Unit 577D--A Indoor FANCabinet Model Rigging Weight Select and Install DuctworkPersonal Injury Hazard Provide for Condensate Disposal Supply and Return Duct OpeningInstall Gas Piping Install Flue HoodCarbon Monoxide Poisoning Hazard Fire or Explosion Hazard Install Electrical ConnectionsUnit Component Damage Hazard Outdoor Air Temperature Sensor OAT Electronic Air CleanerMaximum Gas Flow Capacity Humidifier ConnectionsTypical Installation Control Plate Unit Start-Up and Troubleshooting PRE-START-UPSTART-UP FIRE, EXPLOSION, Electrical Shock and Environmental HazardIndoor Fan Motor Troubleshooting Furnace Control Troubleshooting577D a A10217L A10219C A10219L HP/AC Control Troubleshooting Sequence of Operation Unit Operation HazardAir Delivery and Temperature Rise at Rated Heating Input Heat Pump/Air Conditioner Board Status CodesDehumidification Mode Evolution Controlled LOW Ambient CoolingCheck GAS Input Natural GAS Unit Damage HazardFire and Unit Damage Hazard U.S.AAltitude Derate Multiplier for U.S.A CanadaCheck GAS Input Propane GAS Check Burner FlameStart-Up Adjustments Check for Refrigerant LeaksECM Wet Coil Pressure Drop IN. W.C Heating InputsFilter Pressure Drop Table IN. W.C Cooling Charging Table-Subcooling Maintenance Inducer Pressure Switch Electrical Controls and WiringOutdoor Coil, Indoor Coil, and Condensate Drain Pan Outdoor FanPressure Switches Refrigerant Circuit Refrigerant CircuitIndoor Airflow Copeland Scroll Compressor Puron RefrigerantTroubleshooting Final Checks Care and Maintenance Observe all warnings, cautions, and bold text Troubleshooting Chart Cooling Symptom Cause RemedyTroubleshooting Chart Gas Furnace Operation Burners will not igniteSTART-UP Checklist TemperaturesPreliminary Information Model no III. START-UP Electrical Supply Voltage Compressor Amps

577D----A specifications

The Bryant 577D----A is a highly regarded model in the HVAC industry, representing a blend of efficiency, performance, and advanced technology. This heating and cooling unit is designed to cater to a variety of residential and light commercial applications, making it a versatile choice for consumers looking to enhance their indoor climate control systems.

One of the standout features of the Bryant 577D----A is its impressive energy efficiency rating. With a Seasonal Energy Efficiency Ratio (SEER) typically exceeding 14, this model is engineered to reduce energy consumption, helping homeowners lower their utility bills while minimizing environmental impact. The unit also employs a two-stage cooling system, which not only improves comfort by maintaining more consistent temperatures but also provides enhanced dehumidification during hotter months.

The technology used in the Bryant 577D----A is noteworthy. The unit incorporates a variable-speed compressor that adapts to the specific cooling or heating needs of the space, ensuring optimal performance at all times. This advanced feature not only contributes to energy savings but also allows for quieter operation compared to single-stage systems. The inclusion of a smart thermostat integration further enhances convenience, enabling users to manage their HVAC system remotely and optimize settings according to their schedules.

Additional characteristics of the Bryant 577D----A include a durable construction designed to withstand various environmental conditions. The cabinet is made from quality materials that protect against corrosion and other factors that could affect the unit's longevity. Furthermore, the unit operates quietly, thanks to sound-dampening technologies, which is a significant advantage for residential areas where noise can be a concern.

Maintenance is also simplified with the Bryant 577D----A, as it is equipped with self-diagnostics for easy troubleshooting. This feature alerts users to potential issues before they escalate, promoting efficient operation and prolonging the lifespan of the system.

In conclusion, the Bryant 577D----A stands out as a superior choice for those seeking reliability and efficiency in their HVAC solutions. With its energy-efficient operation, advanced technologies, and robust construction, it serves as a valuable investment for homeowners committed to comfort and sustainability.
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