Bryant R-22 service manual OF2 CESO130076-00, XII. Outdoor Thermostats

Page 22

 

T2 C

 

C

 

O

O

DFT

R

T1

W

 

2

Y

 

 

 

 

 

 

C

Y

 

 

 

 

 

SPEEDUP

P1

 

 

 

 

 

J1

P3

90 INTERVALTIMER

60 30

30 60

120

 

DFT

 

OFF

QUIET SHIFT

ON

 

Speedup

 

 

 

Quiet

 

Pins

 

 

 

Shift

OF2

CESO130076–00

Defrost interval

DIP switches

Fig. 22—Defrost Control

OF1

A99442

either heating or cooling. This enables owner to obtain timely heat-pump service during heating season, reducing supplementary electric heat costs, and during cooling season, reducing period of heat discomfort.

The service alarm is an accessory device. Service alarm locks out compressor under certain adverse operating conditions. System is manually reset by shutting it off at thermostat subbase, then turning it back on. If adverse condition is corrected, system restarts.

One example of an adverse condition would be a system located in a desert climate where high operating temperatures may cause system to shut down on the high-pressure switch or on the compressor internal overload.

Connect service alarm to outdoor-unit control-circuit-terminal board. (See Fig. 25 and wiring diagram on unit.)

Connect all field line-power wires to unit in usual manner. Route 1 field line-power supply wire through metallic loop on bottom of service alarm then to normal unit connection. Units with RLA of less than 14 amps will require 2 passes through the metallic loop.

Refer to Fig. 25 or 26 for wiring connections for service alarm or service alarm with solid-state cycle-protector accessories, when used.

NOTE: The wire from the X terminal on the service alarm to L on the outdoor terminal board, indoor terminal board, and thermostat subbase is field-supplied and wired when using defrost controls HK32FA003 or HK32FA006. When defrost control CES0110063 or CES0130024 is used, field-supplied wire from X terminal on service alarm to L on indoor thermostat subbase is required.

—22—

Service alarm requires 2 inputs.

1.It must sense a 24v input from thermostat. As thermostat calls for heating or cooling, it supplies 24v to service-alarm device.

2.A current transformer (or induction loop) similar to a clamp-on ammeter senses current draw in the compressor lead. Induction loop must sense a minimum current draw when thermostat is calling for heating or cooling.

NOTE: On a single-phase compressor, induction loop senses current in common leg. On a 3-phase compressor, induction loop senses current in any 1 of the phases.

WARNING: If service alarm needs replacing, shut off all power to unit before attempting removal. Electrical shock can cause personal injury or death.

Troubleshooting service-alarm device is easy. With thermostat calling for heating or cooling and compressor running, indoor thermostat light should be off. If on, check for wiring errors or replace the service alarm.

To check for correct operation, shut off circuit breaker or discon- nect switch to outdoor unit while it is running. Signal light on thermostat should light. If this does not occur, check for wiring errors or replace the service alarm.

XII. OUTDOOR THERMOSTAT(S)

The outdoor thermostat(s) is installed in the control box. The sensing bulb(s) remain in the control box. Outdoor thermostat brings on stages of electric heat as outdoor temperature and

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Contents Table of Contents Safety ConsiderationsVIII. LOW-AMBIENT Pressure Switch II. ADD-ON Replacement RetrofitAccessory Descriptions III. Seacoast for AIR Conditioners onlyCoastal Filter II. Interconnecting Tubing SizingIX. Wind Baffle XI. Support FeetMatl 18 GA Steel Matl 20 GA SteelMedium Unit Size Unit HeightSmall Baffle LeftEstimated Percentage of Nominal COOLING-CAPACITY Losses Wind Baffle Dimensions for Cube UnitsIII. Metering Device Sizing Example IV. LIQUID-LINE Solenoid and Tubing CONFIGU- RationFitting Losses in Equivalent FT Calculation of Indoor Piston noCharging Information Common Piston SizesLIQUID-LINE Solenoid KIT Part Numbers VI -SPEED ApplicationsII. Serial Number Identification Positions 6 through 10-Serial NumberRemove TOP COVER-BEFORE 1/1/92 II. Remove FAN-MOTOR ASSEMBLY-BEFORE 1/1/92Cabinet 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 SwitchVIII. Defrost Thermostats HIGH-PRESSURE SwitchLIQUID-LINE Pressure Switch 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 ReplacementCompressor OIL Recharge Copeland Scroll Compressor FeaturesII. Troubleshooting III. Discharge ThermostatIV. Scroll COMPRESSOR, 3-PHASE Monitor Millennium Scroll Compressor FeaturesIII. Troubleshooting II. Compressor ProtectionCESO130075 IFR Indoor External Power Supply 24Cont Equip GND CAP OFM Logic Cont HPS LPSAmbient Temperature for HIGH- LOW-SPEED Operation Function Light Code and Display Location Compressor PTC Ranges III. Factory DefaultsFactory Defaults IV. Major ComponentsTWO-SPEED Compressor Winding Resistance AT 70F ± VI. TroubleshootingLED FUNCTION/MALFUNCTION Lights Refrigeration System Refrigeration Cycle II. Leak DetectionLow-Speed Windings Cooling Cycle 24V PIN Connection TroubleshootingIII. Brazing AllService Valves IV. Service ValvesReliant and Cube Products Produced Reliant Products Except 1992 ProductionVI. Reversing Valve Reversing Valve VII. THERMOSTATIC-EXPANSION Valves TXVVIII. THERMOSTATIC-EXPANSION Valve BI-FLOW TXV TXV Superheat Setting AT Outlet of Evaporator CoilInstallation TXV Type Product Usage Superheat Setting IX. Coil RemovalTXV in Cooling Mode XIII. System Charging XI. AccumulatorXII. Contaminant Removal XIV. Checking ChargeSuperheat Charging Method Required Vapor Temperature FSuperheat Charging Table 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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