Bryant R-22 service manual General Information, Low Ambient Cooling, Defrost

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Airflow Selections for 187ANA / 286ANA / 180ANA024,36,48 / 180ANA060 / 288ANA024,36,48, 60 Using Non-Communicating (Non-Evolution) Thermostats

Airflow Selection for 315AAV/355AAV Furnaces

The 315AAV/355AAV variable-speed furnaces provide high-and low-stage blower operation to match the capacities of the compressor at high and low stages. To select the recommended airflow and for adjustments to the manual switches labeled SW1-5, AC, and CF on the control board, refer to the furnace Installation Instructions. The 315AAV/355AAV utilizes a control center that allows the installing technician to select the proper airflows. The HP switch determines the airflow during high-stage compressor operation. Airflow for high- and low-stage can be calculated at either 350 CFM per ton or 400 CFM per ton, based on the positions of SW1-5.

When using communicating (Evolution) control, dipswitch adjustments are not necessary on furnaces. Airflows are determined by Evolution Control setup.

Airflow Selection for FV4 Fan Coils for 180ANA, 187ANA, 286A, 288A Using Non-Communicating (Non-Evolution) Thermostats

The FV4 provides high- and low-stage blower operation to match the capacities of compressor at high- and low-stage. To select recommended airflow, refer to FV4 Installation Instructions. The FV4 utilizes an Easy Select control board that allows the installing technician to select proper airflows. For adjustments to control board, select appropriate HP SIZE and CFM ADJUST setting. This fan coil has an adjustable blower off delay factory set at 90 sec for high- and low-stage blower operation.

For other combinations of equipment consult Product Data Digest.

GENERAL INFORMATION

Low Ambient Cooling

When this unit is operating below 55_F outdoor temperature, provisions must be made for low ambient operation.

Evolution controlled low ambient cooling:

This unit is capable of low ambient cooling without a kit ONLY when using Evolution control. A low ambient kit is not required, and the outdoor fan motor does not need to be replaced for Evolution controlled low ambient operation. The Evolution Control provides an automatic evaporator coil freeze protection algorithm that eliminates the need for an evaporator freeze thermostat. Low ambient cooling must be enabled in the User Interface set up. Fan may not begin to cycle until about 40_F OAT. Fan will cycle based on coil and outdoor air temperature.

Evolution controlled low ambient mode operates as follows:

SFan is OFF when outdoor coil temp is < (outdoor air temperature + 3_F) or outdoor fan has been ON for 30 minutes. (Fan is turned off to allow refrigerant system to stabilize.)

SFan is ON when outdoor coil temp > (outdoor air temperature + 25_F) or outdoor coil temp > 80_F or if outdoor fan has been OFF for 30 minutes. (Fan is turned on to allow refrigerant system to stabilize.)

SLow pressure switch is ignored for first 3 minutes during low ambient start up. After 3 minutes, if LPS trips, then outdoor fan motor is turned off for 10 minutes, with the compressor running. If LPS closes within 10 minutes then cooling continues with the outdoor fan cycling per the coil temperature routine listed above for the remainder of the cooling cycle. If the LPS does not close within 10 minutes, then the normal LPS trip response (shut down cooling operation and generate LPS trip error) will occur.

For 180ANA/288ANA models, the PWM output for both high and low stage equals the value for low stage operation below 104_F.

Defrost

This control offers 5 possible defrost interval times: 30, 60, 90, 120 minutes, or AUTO.

With non-communicating thermostats, these are selected by dip switches on the unit control board. With communicating thermostats, the Evolution Control User Interface. The Evolution Control selection overrides the control board dip switch settings.

AUTO defrost adjusts the defrost interval time based on the last defrost time as follows:

SWhen defrost time <3 minutes, the next defrost interval=120 minutes.

SWhen defrost time 3-5 minutes, the next defrost interval=90 minutes.

SWhen defrost time 5-7 minutes, the next defrost interval=60 minutes.

SWhen defrost time >7 minutes, the next defrost interval=30 minutes.

The control board accumulates compressor run time. As the accumulated run time approaches the selected defrost interval time, the control board monitors the coil temperature sensor for a defrost demand. If a defrost demand exists, a defrost cycle will be initiated at the end of the selected time interval. A defrost demand exists when the coil temperature is at or below 32_F for 4 minutes during the interval.

The defrost cycle is terminated when the coil temperature reaches 65_F or 10 minutes has passed.

On 286A models, defrost will occur in low- or high-stage as demanded by the thermostat or User Interface regardless of OAT

On 288A models, when OAT is >25_F (-3.9_C), defrost will occur in low- or high-stage as demanded by the thermostat or User Interface.

On 288A models, if OAT is 25_F (-3.9_C), defrost will occur in high-stage only, regardless of thermostat or User Interface demand, and will terminate at 50_F (10_C) coil temperature with a minimum of 2.5 minutes in defrost.

If the coil temperature does not reach 32_F (0_C) within the interval, the interval timer will be reset and start over.

SUpon initial power up the first defrost interval is defaulted to 30 minutes. Remaining intervals are at selected times.

SDefrost is only allowed to occur below 50_F (10_C) outdoor ambient temperature.

The outdoor fan output (ODF) will remain off for 20 seconds after termination. This delay will allow time for the system to capture the heat from the outdoor coil and reduce the “steam cloud” effect that may occur on transition from defrost to the heating cycle. The outdoor fan output OFF delay of 20 seconds may be defeated to enable the fan to energize immediately at the time of termination and 12 seconds prior to the reversing valve de-energizing, through the User Interface setup screen available with SYSTXBBUID01-C UI, or forced defrost pins as follows:

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Contents Application Guideline Table of ContentsTWO Stage Communicating Table of Contents TWO Stage NON-COMMUNICATINGAIR Conditioner and Heat Pump Model Number Nomenclature Serial Number NomenclatureSafety Considerations Installation GuidelineIntroduction Accessories Required Field-Installed Accessories for Air ConditionersRequired Field-Installed Accessories for Heat Pumps Accessory Descriptions LOW-AMBIENT Cooling Guideline Base / Mid-Tier / Deluxe 4-sided Baffle AssemblyDeluxe 3-sided Baffle Assembly and Dimensions Cabinet Assembly Long Line GuidelineBasic Cabinet Designs Access Compressor Or Other Internal Cabinet Components Legacy RNC and Legacy Line Control Box Identification Figure Labels LabelingElectrical Aluminum WireContactor CapacitorTime-Delay Relay Crankcase HeaterCycle Protector Personal Injury Hazard Pressure SwitchesDefrost Control Board Defrost ThermostatDefrost Speedup Troubleshooting HK32EA001 If outdoor unit will not runIf defrost thermostat is stuck closed If defrost thermostat is stuck openQuiet Shift Five-Minute Compressor DelayCooling HeatingFan Motor Troubleshooting HK32EA003Compressor Plug Low-Voltage TerminalsMechanical Failures Compressor FailuresLocked Rotor Runs, Does Not PumpSplit Post Grommet part number KA75UG100 Noisy CompressorSingle-Phase Motors Electrical FailuresUnit Personal Injury Hazard Refrigeration System RefrigerantCompressor Oil Servicing Systems on Roofs With Synthetic Materials Synthetic Roof Precautionary ProcedureBrazing Oil ChargingService Valves and Pumpdown Pumpdown ProcedurePersonal Injury and Unit Damage Hazard AccuRaterr Components Used in R-22 Heat Pumps Heating Piston AccuRaterr Heat Pumps OnlyReversing Valve Heating Mode, Solenoid De-Energized Reversing ValveInstall Liquid-line Filter Drier Indoor AC Liquid Line Filter DrierSuction Line Filter Drier Accumulator AccumulatorThermostatic Expansion Valve TXV Install TXVTXV Operation Unit Operation HazardReplacing TXV on an Indoor Coil pre-2006 Make Piping ConnectionsReplacing TXV on Indoor Coil post-2006 Personal Injury and Environmental HazardLeak Detection Refrigeration System RepairCoil Removal Fire HazardSystem Clean-Up After Burnout Compressor Removal and ReplacementCheck Charge EvacuationDeep Vacuum Method Basic Diagnostics Troubleshooting with SuperheatLow Superheat with Normal or Low Suction Pressure Low Superheat with High Suction PressureHigh Superheat with Normal or High Suction Pressure Hunting SuperheatPseudo Evaporator Superheat Instructions Example Puron System Suction Pressure Drop22 System Suction Pressure Drop Psig PuronrRefrigerant Pressure Temperature ChartPsig 22 Refrigerant Pressure Temperature RelationshipLiquid Line Temperature F Liq Press Subcooling F Psig Puron Subcooling ChartSuperheat F Psig Puron Superheat ChartLiquid Line Temperature F PT F Subcooling F Pres Psig 22 Subcooling Chart22 Superheat Chart Application Guidelines TWO-STAGEModel Plug Model Plug InformationLow Ambient Cooling General InformationDefrost Airflow Selection for 315AAV/355AAV FurnacesDefrost Hold Liquid-Line Solenoid AccessoryForced Defrost All 286A units must be charged in high stage onlyCooling and Heating Operation One Minute Stage Change Time Delay on 286ANA/187ANA ModelsUtility Interface With Evolution Control Compressor Operation on 286ANA/187ANA ModelsOutdoor Fan Motor Operation ECM Fan Motor TroubleshootingTime Delays Muffler, Accumulator, Reversing Valve RVSThermistors Control BOX Troubleshooting 230v Brown-Out Protection Defeated 230V Line Power Disconnect DetectionCompressor Voltage Sensing Contactor Shorted DetectionTemperature Thermistors Unloader Test ProcedureFailed Thermistor Default Operation Thermistor Sensor ComparisonStatus Codes TroubleshootingEdge Thermidistat Models T6-PRH-01 or T6-NRH-01 TWO-STAGE 286B/289B/180B/187B General Information All 286B units must be charged in high stage only Heating Check Chart ProcedureCompressor Operation on 289B/180B Models Low Stage High Stage Low & High Model Troubleshooting 187B & 286B Start Circuit Incoming PowerControl Box Contactor And CapacitorTroubleshooting HK38EA015 circuit board 289B Compressor Thermal Cutout 286B Models Compressor Thermal CutoutOutdoor Coil Thermistor OCT Attachment Status Codes Single Stage Furnace with 2-Stage Air Conditioner Operating Ambient TWO Stage NON-COMMUNICATING 127A/226AAirflow Selections ECM Furnaces Airflow Selection for FV4C Fan Coils non-communicatingSystem Function and Sequence of Operation Compressor OperationDefrost Speedup Check Charge TWO Stage Communicating 167A/266A Airflow Selections for ECM Furnaces non communicatingIndoor Thermostat Control Options Defrost Hold Evolution Controlled Low Ambient CoolingMajor Components Communication and Status Function Lights Outdoor Fan Motor OperationFor Evolution Control only, Green communications Comm Light 2230V Brown-Out Protection Defeated Thermistor Curve No 230V at Compressor ContactorOutdoor Coil Thermistor OCT Attachment Status Codes 167A / 266A TroubleshootingCare and Maintenance Puronr R-410A Refrigerant Quick Reference Guide Final Check-OutAIR Conditioner Troubleshooting Chart Heat Pump Troubleshooting Heating Cycle Heat Pump Troubleshooting Cooling Cycle Description Table # Index of TablesTWO-STAGE 286A/288A 180A/187A TWO-STAGE 286B/288B 180B/187BCatalog No. SM01---6
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R-22 specifications

The Bryant R-22 stands out in the landscape of residential heating and cooling systems with its combination of efficiency, durability, and modern technology. Designed primarily for homeowners seeking comfortable climate control solutions, the R-22 model delivers consistent performance throughout varying seasonal extremes.

One of the main features of the Bryant R-22 is its high energy efficiency. Rated with a SEER (Seasonal Energy Efficiency Ratio) that meets or exceeds industry standards, this air conditioning unit is designed to reduce energy consumption while providing optimal cooling. This not only helps in lowering monthly utility bills but also promotes environmentally responsible usage.

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