Bryant R-22 TWO-SPEED Compressor Winding Resistance AT 70F ±, LED FUNCTION/MALFUNCTION Lights

Page 34

 

 

 

1

 

 

C - TRANSFORMER COMMON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

R - TRANSFORMER LINE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

W2 - FIRST STAGE AUXILIARY HEAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

O - REVERSING VALVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

Y2 - SECOND STAGE COOLING/HEAT PUMP

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

Y1 - FIRST STAGE COOLING/HEAT PUMP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

 

 

W3 - SECOND STAGE AUXILIARY HEAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

 

L - MALFUNCTION LIGHT

 

 

 

 

 

 

 

 

 

11

 

 

4 - TON

IF NO JUMPER IS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INSTALLED, DEFAULT

 

 

 

 

13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5 - TON

IS 3 - TON

 

 

 

 

 

 

 

 

 

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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17

 

 

JUMPER FOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

 

 

HEAT PUMP ONLY

A93576

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 37—Header-Pin Housing

 

T3

T8

 

T7

T2

 

T1

EXTERNAL MAIN

MAIN WINDING

4 POLE START

 

2 POLE START

HIGH SPEED

LOW SPEED

(L1) T1 + T7

(L1) T1

(L2) T2 + T3

(L2) T7 + T8

A92015

Fig. 38—Energizing Windings

TABLE 18—TWO-SPEED COMPRESSOR (WINDING RESISTANCE AT 70°F ± 2 °)

WINDING

3 TON

4 TON

5 TON

T1-T2

0.80

0.70

0.60

T1-T3

3.20

2.20

1.80

T1-T7

1.30

1.00

1.00

T1-T8

3.10

2.20

2.00

 

 

 

 

—34—

pressures exceeds 500 psi. The compressor is also protected by 3 PTC devices attached to the motor windings. The PTC’s resistance is sensed by the 2-speed control board. See Table 16 for resistance ranges.

MECHANICALLY INTERLOCKED CONTACTORS

The 2-speed products are equipped with mechanically interlocked contactors. Each contactor has interconnecting linkage, providing independent interlocks.

The 2-speed control provides the electrical interlock. The contac- tors are supplied with 240v coils, which reduce the va require- ments of the low-voltage (24vac) control system.

TEMPERATURE THERMISTORS

Thermistors are electronic devices which sense temperature. As the temperature increases, the resistance decreases. Two ther- mistors are used to sense temperature: one senses outdoor ambient, and the other senses coil temperature (heat pump only). Refer to Fig. 39 for resistance values versus temperature.

If the outdoor ambient thermistor should fail, a malfunction signal appears on the indoor thermostat and 2-speed control. The control does not initiate second-stage latching, crankcase heater is turned on during all off-cycles, heating defaults to high speed, and defrost initiates on demand from coil thermistor. (See Table 17.)

THERMISTOR CURVE

 

90

(KOHMS)

80

70

 

 

60

RESISTANCE

50

20

 

40

 

30

10

0

0

20

40

60

80

100

120

TEMPERATURE (DEG. F)

A91431

Fig. 39—Resistance Values Versus Temperature

If the outdoor coil thermistor should fail, a malfunction signal appears on the indoor thermostat and 2-speed control. The control defrosts every 90 minutes of heating operation and terminates in 5 minutes. (See Table 17.)

V. LED FUNCTION/MALFUNCTION LIGHTS

The 2-speed control is equipped with an LED function/ malfunc- tion light.

NOTE: Only malfunction signal appears at thermostat. Both function and malfunction signals appear at control board. (See Fig. 33 for LED location.) Table 15 provides the function/malfunction code, location, and definition.

VI. TROUBLESHOOTING

NOTE: Troubleshooting charts for air conditioning and heat pump units are provided in the back of this manual — see Fig. 52, 53, and 54.

COMPRESSOR WINDING CHECK

The 2-speed compressor is nothing more than 2 single-phase motors within 1 compressor shell. When the compressor fails to start or run, there are 3 tests that can be made: open, ground, or short. This compressor has no internal line-break overload; how- ever, it does have PTC motor protectors. See Compressor PTC- Overload Protection section for PTC overload information.

Image 34
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.