Bryant R-22 XIV. LOW-VOLTAGE Terminals, Reciprocating Compressor, Mechanical Failures

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tion shown for the Tecumseh compressor is shown with the triangle formed by the terminals pointing toward the top. The configuration around the fusite terminals is the outline of the terminal covers used on the specific compressors. The slot through which the wires of the plug are routed is oriented on the bottom or slightly to the left or right. The correct plug can be connected easily to the compressor terminals and plug wires routed easily through the slot in the terminal cover. Therefore, if a Carlyle or Bristol compressor is substituted for a Tecumseh compressor, a new plug must be installed. If the plug is not changed, proper connection and routing of the plug wires through the terminal cover will be impossible.

CARLYLE

LEAD 3

BRISTOL

COPELAND

 

 

BLUE

 

 

 

 

 

 

C

S

C S

 

C

S

 

 

R

 

 

 

 

R

 

 

R

 

 

LEAD 1

 

 

LEAD 2

 

 

BLK.

 

 

YEL.

 

TECUMSEH

 

 

 

 

 

 

 

 

LEAD 1

 

 

 

C

 

BLK.

 

 

 

 

 

 

 

C

S

R

 

 

 

 

 

 

S

R

 

 

 

 

 

LEAD 3

 

 

LEAD 2

 

 

BLUE

 

 

YEL.

 

TECUMSEH

LEAD 1

 

 

 

 

BLK.

 

LEAD 3

 

C

 

 

BLUE

 

 

 

 

 

 

 

S

C

 

 

 

 

 

S

 

 

RR

LEAD 2

YEL.

MILLENNIUM

LEAD 1

BLK.

C

C

R S

S

R

LEAD 3

BLUE

LEAD 2

YEL.

A94002

Fig. 27—Compressor Plug

XIV. LOW-VOLTAGE TERMINALS

The low-voltage terminal designations, along with descriptions and/or functions, are used on all split-system condensers and heat pumps:

—25—

G—Energizes blower circuit from indoor thermostat. E—Energizes emergency-heat relay.

W2—Energizes first-stage supplemental heat through defrost relay (wht).

L—Energizes light on thermostat with service alarm. W3—Energizes second- or third-stage supplemental heat. R—Energizes 24v power from transformer (red).

Y—Energizes contactor for first-stage cooling or first-stage heat- ing for heat pumps (yel).

O—Energizes reversing valve on heat pumps (orn). C—Common side of transformer (blk).

RECIPROCATING COMPRESSOR

The compressor is the heart of the refrigeration system. It pumps refrigerant through the system. If it malfunctions, system capacity and efficiency could be negatively affected.

CAUTION: The compressor is an electrical (as well as mechanical) device. Exercise extreme caution when working near compressors. Power should be shut off, if possible, for most troubleshooting techniques. Refriger- ants in system present other safety hazards. Always wear safety glasses and gloves when handling refrigerants.

Compressor failures are classified in 2 broad failure categories: mechanical and electrical. Both types are discussed below.

I. MECHANICAL FAILURES

A compressor is a mechanical pump driven by an electric motor contained in a welded or hermetic shell. In a mechanical failure, motor or electrical circuit appears normal, but compressor does not function normally.

CAUTION: Exercise extreme caution when reading compressor currents when high-voltage power is on. Correct any of the problems described below before installing and running a replacement compressor. Wear safety glasses and gloves when handling refrigerants.

LOCKED ROTOR

In this type of failure, compressor motor and all starting compo- nents are normal. When compressor attempts to start, it draws locked-rotor current and cycles off on the internal protection. Locked-rotor current is measured by applying a clamp-on ammeter around common (blk) lead of the compressor on a single-phase compressor, or any 1 of the leads on a 3-phase compressor. Current drawn when it attempts to start is then measured. LRA (locked- rotor amp) value is stamped on compressor nameplate.

If compressor draws locked-rotor amps and all other external sources of problems have been eliminated, compressor must be replaced. Because compressor is a sealed unit, it is impossible to determine exact mechanical failure. However, complete system should be checked for abnormalities such as incorrect refrigerant charge, restrictions, insufficient airflow across indoor or outdoor coil, and so forth, which could be contributing to the failure.

RUNS, DOES NOT PUMP

In this type of failure, compressor motor runs and turns compres- sor, but compressor does not pump the refrigerant. A clamp-on ammeter on common leg of a single-phase compressor, or any 1 lead of a 3-phase compressor, shows a very low current draw, much lower than RLA (rated load amps) value stamped on compressor nameplate. Because no refrigerant is being pumped, there is no return gas to cool compressor motor. It eventually overheats and shuts off on its internal protection.

RUNS, DOES NOT PUMP, HIGH-TO-LOW SIDE LEAK

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Contents Safety Considerations Table of ContentsAccessory Descriptions II. ADD-ON Replacement RetrofitVIII. LOW-AMBIENT Pressure Switch III. Seacoast for AIR Conditioners onlyIX. Wind Baffle II. Interconnecting Tubing SizingCoastal Filter XI. Support FeetMatl 20 GA Steel Matl 18 GA SteelSmall Unit Size Unit HeightMedium Baffle LeftEstimated Percentage of Nominal COOLING-CAPACITY Losses Wind Baffle Dimensions for Cube UnitsIII. Metering Device Sizing Fitting Losses in Equivalent FT IV. LIQUID-LINE Solenoid and Tubing CONFIGU- RationExample Calculation of Indoor Piston noLIQUID-LINE Solenoid KIT Part Numbers Common Piston SizesCharging Information VI -SPEED ApplicationsPositions 6 through 10-Serial Number II. Serial Number IdentificationCabinet II. Remove FAN-MOTOR ASSEMBLY-BEFORE 1/1/92Remove TOP COVER-BEFORE 1/1/92 III. Information PLATE-RELIANT ProductsVI. Remove FAN-MOTOR ASSEMBLY-AFTER 1/1/92 Basic Cabinet Designs Electrical Aluminum WireII. Contactors Information PlateStart Capacitors and PTC Devices III. CapacitorsIV. Cycle Protector Temporary Capacitance BoostCrankcase Heater VI. TIME-DELAY RelayLOW-PRESSURE Switch VII. Pressure SwitchesLIQUID-LINE Pressure Switch HIGH-PRESSURE SwitchVIII. Defrost Thermostats IX. DEFROST-CONTROL BoardCES0110063 CES0130024 CES0110063 Defrost ControlSPEED-UP Defrost Control SPEED-UP Timing SEParameter Minimum Maximum XI. Service Alarm Control Board Defrost Timer SettingsFAN Motors XII. Outdoor Thermostats OF2 CESO130076-00Aeroquiet System and Aeromax TOP FAN PositionXIII. Compressor Plug Service Alarm Wiring ConnectionsReciprocating Compressor XIV. LOW-VOLTAGE TerminalsMechanical Failures II. Electrical Failures IV. Compressor Removal and Replacement III. System Cleanup After BurnoutII. Troubleshooting Copeland Scroll Compressor FeaturesCompressor OIL Recharge III. Discharge ThermostatIII. Troubleshooting Millennium Scroll Compressor FeaturesIV. Scroll COMPRESSOR, 3-PHASE Monitor II. Compressor ProtectionCont Equip GND CAP OFM Logic IFR Indoor External Power Supply 24CESO130075 Cont HPS LPSAmbient Temperature for HIGH- LOW-SPEED Operation Function Light Code and Display Location Factory Defaults III. Factory DefaultsCompressor PTC Ranges IV. Major ComponentsTWO-SPEED Compressor Winding Resistance AT 70F ± VI. TroubleshootingLED FUNCTION/MALFUNCTION Lights II. Leak Detection Refrigeration System Refrigeration CycleLow-Speed Windings III. Brazing 24V PIN Connection TroubleshootingCooling Cycle AllIV. Service Valves Service ValvesReliant and Cube Products Produced Reliant Products Except 1992 ProductionVI. Reversing Valve VII. THERMOSTATIC-EXPANSION Valves TXV Reversing ValveInstallation TXV Type Product Usage Superheat Setting TXV Superheat Setting AT Outlet of Evaporator CoilVIII. THERMOSTATIC-EXPANSION Valve BI-FLOW TXV IX. Coil RemovalTXV in Cooling Mode XII. Contaminant Removal XI. AccumulatorXIII. System Charging XIV. Checking ChargeSuperheat Charging Table Required Vapor Temperature FSuperheat 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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