Bryant R-22 service manual TWO Stage Communicating 167A/266A, Indoor Thermostat Control Options

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TWO STAGE COMMUNICATING 167A/266A

These units provide an Evolution capable 2 stage product in the Preferred line utilizing 2 stage scroll technology. These units are designed using the full-coil cabinet with is currently used for the Legacy Line products. Although the deluxe cabinet used in other Preferred Series products provides excellent sound levels, serviceability and stylish appearance, its design does not allow for coil surface area required to achieve targeted ratings. These units require a variable speed furnace (355AAV, 315AAV) Performance Boost furnace (313AAV, 353AAV) or variable speed fan coil (FE4 or new FV4C) to achieve targeted ratings.

These units are capable of operating with either Evolution User Interface or basic 24 volt thermostat inputs.

Indoor Thermostat Control Options

Model

Evolution

Standard 2---stage

Control

Thermostat

 

 

 

 

266A

Yes

Yes

 

 

 

Operating Ambient

The minimum outdoor operating ambient in cooling mode is 55_F (12.78_C) without low ambient cooling enabled, and the maximum outdoor operating ambient in cooling mode is 125_F (51.67_C). At line voltage of 208v (or below) and an outdoor ambient of 120_F (48.9_C) (and above), the compressor operates in low stage. On Evolution communicating systems ONLY, low ambient cooling operation is possible at ambient as low as 0_F (-17.78_C).

The maximum outdoor operating ambient in heating mode is 66°F/18.89_C on all models.

Model Plug

Each control board contains a model plug. The correct model plug must be installed for or the system to operate properly. (See Table 22.)

Table 22—Model Plug Information

MODEL

MODEL PLUG

PIN RESISTANCE

(K---ohms)

NUMBER

NUMBER

 

 

 

 

Pins 1---4

Pins 2---3

 

 

 

 

266ANA024

HK70EZ041

18

91

266ANA036

HK70EZ043

18

150

266ANA048

HK70EZ045

18

220

266ANA060

HK70EZ047

18

360

167ANA024

Hk70EZ040

18

75

167ANA036

Hk70EZ042

18

120

167ANA048

Hk70EZ044

18

180

167ANA060

Hk70EZ046

18

270

The model plug is used to identify the type and size of unit to the control.

Airflow Selections for ECM Furnaces (non communicating)

The ECM Furnaces provide blower operation to match the capacities of the compressor during high and low stage cooling operation. Tap selections on the furnace control board enable the installing technician to select the proper airflows for each stage of cooling. Below is a brief summary of the furnace airflow configurations

1.The Y2 call for high stage cooling energizes the “Cool” tap on the control board. The grey wire from cool tap is connec- ted to tap 5 on the motor. Refer to the furnace Product Data to find the corresponding airflow. If the airflow setting for high cooling needs to be switched from tap 5 to a different tap, jumper a connection from the cool tap to the desired tap so that the Y2 signal is communicated via the cool tap to the desired speed tap.

2.The Y1 call for low stage cooling energizes the “Fan” tap on the control board. The red wire from the fan tap is con- nected to tap 1 on the motor. Refer to the furnace Product

Data to find the corresponding airflow. If the airflow setting for low cooling needs to be switched from tap 1 to a differ- ent tap, jumper a connection from the Fan tap to the desired tap so that the Y1 signal is communicated via the Fan tap to the desired speed tap. The Y1 setting will also govern the continuous fan airflow for the furnace.

Refer to the furnace literature for further details.

Airflow Selection for Variable Speed Furnaces (non-communicating)

The variable speed furnaces provide blower operation to match the capacities of the compressor during high and low stage cooling operation. The furnace control board allows the installing technician to select the proper airflows for each stage of cooling. Below is a summary of required adjustments. See furnace installation instructions for more details:

1.Turn SW1--5 ON for 400 CFM/ton airflow or OFF for 350 CFM/ton airflow. Factory default is OFF.

2.The A/C DIP switch setting determines airflow during high stage cooling operation. Select the A/C DIP switch setting corresponding to the available airflow shown in the furnace Installation Instructions that most closely matches the re- quired airflow shown in the air conditioning Product Data for HIGH speed.

3.The CF DIP switch setting determines airflow during low stage cooling operation. Select the CF DIP switch setting corresponding to the available airflow shown in the furnace installation instructions that most closely matches the re- quired airflow shown in the air conditioning Product Data for LOW speed. If a higher or lower continuous fan speed is desired, the continuous fan speed can be changed using the fan switch on the thermostat. Refer to the furnace Installa- tion Instructions for details of how to use this feature.

Airflow Selection for FV4C Fan Coils Using Non-Communicating (Non-Evolution) Thermo- stats

The FV4C provides high- and low-stage blower operation to match the capacities of compressor at high- and low-stage. To select recommended airflow, refer to FV4C Installation Instructions. The FV4C 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.

When using a communicating (Evolution) control, dipswitch adjustments are not necessary. Airflows are determined by Evolution Control setup. The fan coil is the FE4A.

For other combinations of equipment consult Product Data Digest.

NOTE: Systems using only a non-communicating (non-Evolution) thermostat, Bryant electronic thermostats are equipped with a 15-minute staging timer. This timer prevents the two-stage system from operating at high stage until unit has been operating in low stage for 15 minutes, unless there is at least a ±5°F (±2.8°C) difference between room temperature and thermostat set point. To force high stage (after a minimum of 2 minutes in low stage), adjust the set point at least ±5°F (±2.8°C) below room ambient.

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Contents Table of Contents Application GuidelineAIR Conditioner and Heat Pump Model Number Nomenclature Table of Contents TWO Stage NON-COMMUNICATINGTWO Stage Communicating Serial Number NomenclatureInstallation Guideline Safety ConsiderationsIntroduction Required Field-Installed Accessories for Air Conditioners AccessoriesRequired Field-Installed Accessories for Heat Pumps Accessory Descriptions Base / Mid-Tier / Deluxe 4-sided Baffle Assembly LOW-AMBIENT Cooling GuidelineDeluxe 3-sided Baffle Assembly and Dimensions Long Line Guideline Cabinet AssemblyBasic Cabinet Designs Access Compressor Or Other Internal Cabinet Components Legacy RNC and Legacy Line Control Box Identification Labeling Figure LabelsContactor Aluminum WireElectrical CapacitorCrankcase Heater Time-Delay RelayCycle Protector Pressure Switches Personal Injury HazardDefrost Thermostat Defrost Control BoardIf defrost thermostat is stuck closed Troubleshooting HK32EA001 If outdoor unit will not runDefrost Speedup If defrost thermostat is stuck openCooling Five-Minute Compressor DelayQuiet Shift HeatingCompressor Plug Troubleshooting HK32EA003Fan Motor Low-Voltage TerminalsLocked Rotor Compressor FailuresMechanical Failures Runs, Does Not PumpNoisy Compressor Split Post Grommet part number KA75UG100Electrical Failures Single-Phase MotorsUnit Personal Injury Hazard Refrigerant Refrigeration SystemCompressor Oil Brazing Synthetic Roof Precautionary ProcedureServicing Systems on Roofs With Synthetic Materials Oil ChargingPumpdown Procedure Service Valves and PumpdownPersonal Injury and Unit Damage Hazard Heating Piston AccuRaterr Heat Pumps Only AccuRaterr Components Used in R-22 Heat PumpsReversing Valve Reversing Valve Heating Mode, Solenoid De-EnergizedLiquid Line Filter Drier Install Liquid-line Filter Drier Indoor ACSuction Line Filter Drier Accumulator AccumulatorTXV Operation Install TXVThermostatic Expansion Valve TXV Unit Operation HazardReplacing TXV on Indoor Coil post-2006 Make Piping ConnectionsReplacing TXV on an Indoor Coil pre-2006 Personal Injury and Environmental HazardCoil Removal Refrigeration System RepairLeak Detection Fire HazardCompressor Removal and Replacement System Clean-Up After BurnoutEvacuation Check ChargeDeep Vacuum Method Low Superheat with Normal or Low Suction Pressure Troubleshooting with SuperheatBasic Diagnostics Low Superheat with High Suction PressureHunting Superheat High Superheat with Normal or High Suction PressurePseudo Evaporator Superheat Instructions Puron System Suction Pressure Drop Example22 System Suction Pressure Drop PuronrRefrigerant Pressure Temperature Chart Psig22 Refrigerant Pressure Temperature Relationship PsigPuron Subcooling Chart Liquid Line Temperature F Liq Press Subcooling F PsigPuron Superheat Chart Superheat F Psig22 Subcooling Chart Liquid Line Temperature F PT F Subcooling F Pres Psig22 Superheat Chart Model Plug TWO-STAGEApplication Guidelines Model Plug InformationDefrost General InformationLow Ambient Cooling Airflow Selection for 315AAV/355AAV FurnacesForced Defrost Liquid-Line Solenoid AccessoryDefrost Hold All 286A units must be charged in high stage onlyUtility Interface With Evolution Control One Minute Stage Change Time Delay on 286ANA/187ANA ModelsCooling and Heating Operation Compressor Operation on 286ANA/187ANA ModelsECM Fan Motor Troubleshooting Outdoor Fan Motor OperationMuffler, Accumulator, Reversing Valve RVS Time DelaysThermistors Control BOX Troubleshooting Compressor Voltage Sensing 230V Line Power Disconnect Detection230v Brown-Out Protection Defeated Contactor Shorted DetectionFailed Thermistor Default Operation Unloader Test ProcedureTemperature Thermistors Thermistor Sensor ComparisonTroubleshooting Status CodesEdge Thermidistat Models T6-PRH-01 or T6-NRH-01 TWO-STAGE 286B/289B/180B/187B General Information Heating Check Chart Procedure All 286B units must be charged in high stage onlyCompressor Operation on 289B/180B Models Low Stage High Stage Low & High Model Control Box Incoming PowerTroubleshooting 187B & 286B Start Circuit Contactor And CapacitorTroubleshooting HK38EA015 circuit board 286B Models Compressor Thermal Cutout 289B Compressor Thermal CutoutOutdoor Coil Thermistor OCT Attachment Status Codes Single Stage Furnace with 2-Stage Air Conditioner Airflow Selections ECM Furnaces TWO Stage NON-COMMUNICATING 127A/226AOperating Ambient Airflow Selection for FV4C Fan Coils non-communicatingCompressor Operation System Function and Sequence of OperationDefrost Speedup Check Charge Airflow Selections for ECM Furnaces non communicating TWO Stage Communicating 167A/266AIndoor Thermostat Control Options Evolution Controlled Low Ambient Cooling Defrost HoldMajor Components Outdoor Fan Motor Operation Communication and Status Function LightsFor Evolution Control only, Green communications Comm Light 2230V Brown-Out Protection Defeated No 230V at Compressor Contactor Thermistor CurveOutdoor Coil Thermistor OCT Attachment 167A / 266A Troubleshooting Status CodesCare and Maintenance Final Check-Out Puronr R-410A Refrigerant Quick Reference GuideAIR Conditioner Troubleshooting Chart Heat Pump Troubleshooting Heating Cycle Heat Pump Troubleshooting Cooling Cycle TWO-STAGE 286A/288A 180A/187A Index of TablesDescription Table # 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.

Another notable characteristic is the unit's durability. Constructed with a robust cabinet and high-quality components, the R-22 is built to withstand the rigors of daily use, with protective features that enhance its longevity. The cabinet comes with a powder-coated finish that resists corrosion and harsh weather conditions, ensuring that the unit stays functional and aesthetically pleasing for years.

The Bryant R-22 also incorporates advanced technology to improve user experience. One such innovation is the SmartSet technology, which allows homeowners to program their unit to optimize comfort levels according to their specific needs. This programmable capability enhances energy savings and ensures that the home remains at the desired temperature when residents are present.

Moreover, the unit features a Quiet Operating System that significantly reduces noise levels, making it suitable for residential areas where noise might be a concern. The design minimizes vibrations and optimizes airflow, creating a comfortable environment without disruptive sounds.

For added convenience, the Bryant R-22 is compatible with various thermostat options, including Wi-Fi-enabled models. This allows users to control their home's climate from anywhere using a smartphone app, facilitating effortless adjustments and monitoring of energy usage.

Finally, the Bryant R-22 is backed by a solid warranty, providing peace of mind for homeowners. This commitment to quality and customer satisfaction is a testament to Bryant’s dedication to producing reliable and efficient HVAC solutions. Overall, the Bryant R-22 is an exemplary choice for those looking to enhance their home comfort with the latest in HVAC technology.
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