Bryant R-22 III. Brazing, 24V PIN Connection Troubleshooting, Cooling Cycle, All, Auxiliary Heat

Page 37

 

COOLING CYCLE

 

 

REVERSING VALVE

 

 

(ENERGIZED)

 

OUTDOOR FAN

 

INDOOR

INDOOR COIL

 

FAN

 

 

 

ACCUMULATOR

 

 

SUCTION SERVICE

 

 

PORT AT SERVICE

 

 

VALVE (CLG CYCLE)

COMP

 

 

 

 

STRAINER

STRAINER

 

OUTDOOR

 

COIL

 

 

(METERING)

SUCTION

LIQUID LINE

SERVICE

PRESSURE SWITCH

 

 

PORT

HEAT PUMP

(BYPASSING)

 

ACCESSORY

LIQUID LINE SERVICE PORT

FILTER DRIER

AT SERVICE VALVE (CLG CYCLE)

(DUAL FLOW)

 

A88400

Fig. 42—Heat Pump Refrigerant-Flow Diagrams

CAUTION: Due to the high pressure of nitrogen, it should never be used without a pressure regulator on the tank.

Leaks in a system pressurized with refrigerant can be spotted with a leak detector that detects extremely small refrigerant leaks. This discussion assumes that system is pressurized with either all refrigerant or a mixture of nitrogen and refrigerant.

If system has been operating for some time, make first check for a leak visually. Since refrigerant carries a small quantity of oil, traces of oil at any joint or connection are an indication that refrigerant is leaking at that point.

A simple and inexpensive method of testing for leaks is to use soap bubbles. Any solution of water and soap may be used. Soap solution is applied to all joints and connections in system. A small pinhole leak is located by tracing bubbles in soap solution around leak.

Use electronic leak detector to check for leaks. This unquestion- ably is the most efficient and easiest method for checking leaks. There are various types of electronic leak detectors. Generally speaking, they are all portable, and most are lightweight, consist- ing of a box with several switches and a probe or sniffer. Detector is turned on and probe is passed around all fittings and connections in system. Leak is detected by either a movement of a pointer on detector dial, by a buzzing sound, or a light.

In all instances, when a leak is found, system charge must be bled down and leak repaired before final charging and operation. After leak testing or leak is repaired, evacuate system, and recharge with correct refrigerant charge.

A88401

Fig. 43—Leak Detector

III. BRAZING

When brazing is required in the refrigeration system, certain basics should be followed:

1.Clean joints make the best joints. To clean:

a.Remove all oxidation from surfaces to a shiny finish before brazing.

TABLE 19—24V PIN CONNECTION TROUBLESHOOTING

MODE OF OPERATION

TERMINAL

LOCATION ON

VOLTAGE

VOLTAGE

POSSIBLE SOURCE

18-PIN CONNECTOR

DESIGNATION

CONTROL BOARD

PATH

REQUIRED

OF PROBLEM

All

R-C

2-1

Input

24

Check transformer (secondary)

Low-speed Cooling

Y1,0-C

8,6-1

Input

24

Check thermostat

High-speed Cooling

Y1, Y2, 0-C

8,7,6-1

Input

24

Check thermostat

Low-speed Heating

Y1-C

8-1

Input

24

Check thermostat

 

Y1-C

8-1

Input

24

Check thermostat

High-speed Heating

 

 

 

 

 

Y2-C

7-1

Output

24

Outdoor temperature below

 

speed; change temperature

 

 

 

 

 

 

Y1-C

8-1

Input

24

Check thermostat

Defrost

 

 

 

 

 

Y2, W2, 0-C

7,5,6-1

Output

24

Outdoor temperature below 50°F;

 

Coil temperature less than 30°F

 

 

 

 

 

Second Stage of

Y1, W2-C

7,5-1

Input

24

Check thermostat

Auxiliary Heat

W3, Y2-C

9,8-1

Output

24

Check balance-point setting

 

 

 

 

 

 

Cooling Second-

Y1, Y2, 0-C

8,7,6-1

Input

24

Ambient thermistor failure;

stage Latching

Check second-stage POT

 

 

 

 

—37—

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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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