Bryant R-22 service manual Reversing Valve, VII. THERMOSTATIC-EXPANSION Valves TXV

Page 40

NEW SOLENOID COIL

3 PORT DESIGN

A91457

4TH PORT

4 PORT DESIGN

A91456

Fig. 46—Reversing Valve

If valve is defective:

1.Shut off all power to unit and remove all charge from system.

5.Use slip couplings to install new valve with stubs back into system. Even if stubs are long, wrap valve with a wet rag to prevent overheating.

2. Check valve design. If valve is of the 3-port design and new

replacement is of the 4-port design, replacement of the

solenoid coil and wire leads is necessary. Valve bodies are

interchangeable, but solenoid and wires are not. Three-port

reversing valve and solenoid coil with leads must be used

6.After valve is brazed in, check for leaks. Evacuate and charge system. Operate system in both modes several times to be sure valve functions properly.

together. New solenoid coil cannot be used on a 3-port

valve.

Four-port reversing valve uses solenoid with quick-connect

terminals for leads connection. Old solenoid coil cannot be

used on 4-port reversing valve. If for any reason a new wire

cord is not available, cut the leads on the old solenoid coil

as close to the coil as possible. Terminate the leads with 2

female 1/4-in. quick-connects. Connect terminals to new

solenoid and tape connection to insulate and provide

moisture barrier. Replace these wires as soon as wire cord

is available. See RCD (Replacement Component Catalog)

for proper cord part number.

3. Remove solenoid coil from valve body. Remove valve by

cutting it from system with tubing cutter. Repair person

should cut in such a way that stubs can be easily rebrazed

TO OUTDOOR

COIL

TP-4

FROM COMPRESSOR

DISCHARGE LINE

FROM INDOOR COIL VIA SERVICE VALVE ON OUTDOOR COIL

TO ACCUMULATOR

TP-3TP-2

TP-1

back into system. Do not use hacksaw. This introduces

chips into system that cause failure. After defective valve is

removed, wrap it in wet rag and carefully unbraze stubs.

Save stubs for future use. Because defective valve is not

overheated, it can be analyzed for cause of failure when it

is returned.

4. Braze new valve onto used stubs. Keep stubs oriented

correctly. Scratch corresponding matching marks on old

valve and stubs and on new valve body to aid in lining up

new valve properly. When brazing stubs into valve, protect

valve body with wet rag to prevent overheating.

—40—

A88342

Fig. 47—Reversing Valve (Cooling Mode or Defrost

Mode, Solenoid Energized)

VII. THERMOSTATIC-EXPANSION VALVES (TXV)

The types of TXVs used in condensing-unit and heat-pump systems are as follows:

Rapid-Pressure Balance (RPB)—Has a special bleed port that allows rapid bleed-through of pressure after system shutdown until pressure equalization occurs within approximately 1 to 2 minutes.

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Contents Table of Contents Safety ConsiderationsII. ADD-ON Replacement Retrofit Accessory DescriptionsVIII. LOW-AMBIENT Pressure Switch III. Seacoast for AIR Conditioners onlyII. Interconnecting Tubing Sizing IX. Wind BaffleCoastal Filter XI. Support FeetMatl 18 GA Steel Matl 20 GA SteelUnit Size Unit Height SmallMedium Baffle LeftEstimated Percentage of Nominal COOLING-CAPACITY Losses Wind Baffle Dimensions for Cube UnitsIII. Metering Device Sizing IV. LIQUID-LINE Solenoid and Tubing CONFIGU- Ration Fitting Losses in Equivalent FTExample Calculation of Indoor Piston noCommon Piston Sizes LIQUID-LINE Solenoid KIT Part NumbersCharging Information VI -SPEED ApplicationsII. Serial Number Identification Positions 6 through 10-Serial NumberII. Remove FAN-MOTOR ASSEMBLY-BEFORE 1/1/92 CabinetRemove TOP COVER-BEFORE 1/1/92 III. Information PLATE-RELIANT ProductsVI. Remove FAN-MOTOR ASSEMBLY-AFTER 1/1/92 Electrical Aluminum Wire Basic Cabinet DesignsInformation Plate II. ContactorsIII. Capacitors Start Capacitors and PTC DevicesTemporary Capacitance Boost IV. Cycle ProtectorVI. TIME-DELAY Relay Crankcase HeaterVII. Pressure Switches LOW-PRESSURE SwitchHIGH-PRESSURE Switch LIQUID-LINE Pressure SwitchVIII. Defrost Thermostats IX. DEFROST-CONTROL BoardCES0110063 Defrost Control CES0110063 CES0130024SPEED-UP Defrost Control SPEED-UP Timing SEParameter Minimum Maximum XI. Service Alarm Control Board Defrost Timer SettingsFAN Motors OF2 CESO130076-00 XII. Outdoor ThermostatsFAN Position Aeroquiet System and Aeromax TOPService Alarm Wiring Connections XIII. Compressor PlugReciprocating Compressor XIV. LOW-VOLTAGE TerminalsMechanical Failures II. Electrical Failures III. System Cleanup After Burnout IV. Compressor Removal and ReplacementCopeland Scroll Compressor Features II. TroubleshootingCompressor OIL Recharge III. Discharge ThermostatMillennium Scroll Compressor Features III. TroubleshootingIV. Scroll COMPRESSOR, 3-PHASE Monitor II. Compressor ProtectionIFR Indoor External Power Supply 24 Cont Equip GND CAP OFM LogicCESO130075 Cont HPS LPSAmbient Temperature for HIGH- LOW-SPEED Operation Function Light Code and Display Location III. Factory Defaults Factory DefaultsCompressor PTC Ranges IV. Major ComponentsTWO-SPEED Compressor Winding Resistance AT 70F ± VI. TroubleshootingLED FUNCTION/MALFUNCTION Lights Refrigeration System Refrigeration Cycle II. Leak DetectionLow-Speed Windings 24V PIN Connection Troubleshooting III. BrazingCooling Cycle AllService Valves IV. Service ValvesReliant and Cube Products Produced Reliant Products Except 1992 ProductionVI. Reversing Valve Reversing Valve VII. THERMOSTATIC-EXPANSION Valves TXVTXV Superheat Setting AT Outlet of Evaporator Coil Installation TXV Type Product Usage Superheat SettingVIII. THERMOSTATIC-EXPANSION Valve BI-FLOW TXV IX. Coil RemovalTXV in Cooling Mode XI. Accumulator XII. Contaminant RemovalXIII. System Charging XIV. Checking ChargeRequired Vapor Temperature F Superheat Charging TableSuperheat Charging Method Subcooling Charging MethodReliant AIR Conditioners Care and MaintenanceReliant Heat Pumps Required LIQUID-LINE Temperature Page AIR Conditioner Troubleshooting Chart Heat Pump TROUBLESHOOTING-COOLING Cycle Heat Pump TROUBLESHOOTING-HEATING Cycle
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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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