Low Charge Cooling, Perfect Humidity System Charging

Fig. 44 — Cleaning Condenser Coil

Fig. 45 — Propping Up Top Panel

Fig. 46 — Separating Coil Sections

UNIT 581B	FAN HEIGHT — “A” (in.)
036-060 and 072 (208/230 V)	2.75
072 (460 and 575 V)	3.50

Fig. 47 — Condenser-Fan Adjustment

A. No Charge

Use standard evacuating techniques. After evacuating sys- tem to 500 microns, weigh in the specified amount of refrig- erant. (Refer to Table 1 and unit information plate.)

B. Low Charge Cooling

Using Cooling Charging Charts, Fig. 48-51, vary refrigerant until the conditions of the charts are met. Note the charging charts are different from type normally used. Charts are based on charging the units to the correct superheat for the various operating conditions. Accurate pressure gage and temperature sensing device are required. Connect the pressure gage to the service port on the suction line. Mount the temperature sensing device on the suction line and insulate it so that outdoor ambient temperature does not affect the reading. Indoor-air cfm must be within the normal operating range of the unit.

C. Perfect Humidity™ System Charging

The system charge for units with the Perfect Humidity system is greater than that of the standard unit alone. The charge for units with this option is indicated on the unit nameplate drawing. Also refer to Fig. 52-55. To charge systems using the Perfect Humidity Dehumidification system, fully evacuate, recover, and recharge the system to the unit information plate specified charge level.

To check or adjust refrigerant charge on systems using the Per- fect Humidity Dehumidification system, charge per Fig. 52-55.

NOTE: When using the charging charts, it is important that only the subcooling/reheat dehumidification coil liquid line solenoid valve be energized. The subcooling/reheat dehumid- ification coil liquid line solenoid valve MUST be energized to use the charging charts and the outdoor motor speed control- ler jumpered to run the fan at full speed.

The charts reference a liquid pressure (psig) and tempera- ture at a point between the condenser coil and the subcooling/reheat dehumidification coil. A tap is provided on the unit to measure liquid pressure entering the subcooling/ reheat dehumidification coil.

IMPORTANT: The subcooling mode charging charts (Fig. 52-55) are to be used ONLY with units having the optional Perfect Humidity subcooling option. DO NOT use standard charge (Fig. 48-51) for units with Perfect Humidity system, and DO NOT use Fig. 52-55 for standard units.

D. To Use Cooling Charging Chart, Standard Unit

Take the outdoor ambient temperature and read the suction pressure gage. Refer to charts to determine what suction tem- perature should be. If suction temperature is high, add refrig- erant. If suction temperature is low, carefully recover some of the charge. Recheck the suction pressure as charge is adjusted. Example (Fig. 50):

Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 F Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 psig Suction Temperature should be . . . . . . . . . . . . . . . . . . . . 48 F (Suction temperature may very ± 5 F.)

If charging device is used, temperature and pressure read- ings must be accomplished using the charging charts.

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581B specifications

The Bryant 581B is an innovative and highly efficient gas furnace that stands out in the HVAC market for its remarkable performance, reliability, and advanced features. Designed to provide optimal heating comfort, the Bryant 581B is perfect for homeowners seeking both quality and energy efficiency.

One of the main features of the Bryant 581B is its impressive Annual Fuel Utilization Efficiency (AFUE) rating. With an AFUE rating of up to 80%, this gas furnace maximizes energy usage, ensuring that a significant portion of the fuel is converted into heat for your home. This efficiency not only translates into lower energy bills but also reduces the carbon footprint, making it an environmentally friendly choice.

The furnace is equipped with a multi-speed blower motor that enhances comfort by providing consistent airflow throughout the home. This technology adjusts to different heating demands, ensuring that every room reaches the desired temperature without the discomfort of hot or cold spots. The quiet operation of the blower motor also adds to the overall comfort, creating a peaceful home environment.

Another notable characteristic of the Bryant 581B is its durable construction. It features a robust heat exchanger built from high-quality materials, designed to withstand the rigors of daily use. The compact design of the furnace allows it to fit seamlessly into various spaces, making it an ideal choice for both new installations and replacement projects.

The Bryant 581B also comes with advanced safety features, including a self-diagnostic control board that monitors the system's performance. This feature allows for easy troubleshooting and maintenance, prolonging the life of the furnace. Additionally, the furnace is equipped with an induced draft blower that enhances venting efficiency and safety by ensuring that combustion gases are safely expelled from the home.

For homeowners looking for enhanced control, the Bryant 581B is compatible with a range of smart thermostats, providing the ability to monitor and adjust heating settings remotely. This integration with smart technology ensures that homeowners can maintain their desired comfort levels while maximizing efficiency.

In conclusion, the Bryant 581B gas furnace is a top-tier option that combines efficiency, durability, and modern technology. With its high AFUE rating, multi-speed blower, and advanced safety features, it promises to deliver unparalleled comfort and peace of mind for years to come. Whether for a new build or an upgrade, the Bryant 581B is an investment that pays off in both comfort and savings.