IV. REFRIGERANT CHARGE

Amount of refrigerant charge is listed on unit nameplate (also refer to Table 1). Unit panels must be in place when unit is operating during charging procedure.

This unit uses a ®xed-ori®ce refrigerant metering device lo- cated in the coil header. There is one ori®ce in each coil cir- cuit. The size of the ori®ce is stamped on the outside of the tube where the ori®ce is located. Ori®ces are factory-selected for optimum performance and are not designed to be changed in the ®eld. To determine if an ori®ce is plugged, disconnect power to the evaporator-fan motor and start the unit in Cool- ing mode. Observe the coil for an uneven frost pattern, indi- cating a plugged ori®ce.

A. No Charge

Use standard evacuating techniques. After evacuating sys- tem, weigh in the speci®ed amount of refrigerant. (Refer to Table 1.)

B. Low Charge Cooling

Using Cooling Charging Charts, Fig. 40-43, vary refrigerant until the conditions of the appropriate chart are met. Note the charging charts are different from type normally used. Charts are based on charging the units to the correct super- heat 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 insu- late it so that outdoor ambient temperature does not affect the reading. Indoor-air cfm must be within the normal oper- ating range of the unit.

C. To Use Cooling Charging Charts

Take the outdoor ambient temperature and read the suction pressure gage. Refer to appropriate chart to determine what suction temperature should be. If suction temperature is high, add refrigerant. If suction temperature is low, carefully re- cover some of the charge. Recheck the suction pressure as charge is adjusted.

Example: (Fig. 42)

Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . 85 F Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . 80 psig Suction Temperature should be . . . . . . . . . . . . . . . . 68 F (Suction Temperature may vary ± 5 F.)

D. Refrigerant Leaks

Proceed as follows to repair a refrigerant leak and to charge the unit:

1.Locate leak and ensure that refrigerant system pres- sure has been relieved.

2.Repair leak following accepted practices.

NOTE: Install a ®lter drier whenever the system has been opened for repair.

3.Add a small charge of R-22 refrigerant vapor to system and leak-test unit.

4.Evacuate refrigerant system if additional leaks are not found.

5.Charge unit with R-22 refrigerant, using a volumetric- charging cylinder or accurate scale. Refer to unit rating plate for required charge. Be sure to add extra refriger- ant to compensate for internal volume of ®lter drier.

V.REPLACEMENT PARTS

A complete list of replacement parts may be obtained from your distributor upon request.

Fig. 39 Ð Condenser-Fan Adjustment

Ð30Ð

Page 29 Page 31
Page 30
Image 30
Bryant 558D installation instructions IV. Refrigerant Charge, Replacement Parts
Page 29 Page 31

558D specifications

The Bryant 558D represents a leading-edge model in the realm of advanced heating, ventilation, and air conditioning (HVAC) systems. Designed for both residential and light commercial applications, this unit brings together efficiency, performance, and reliability, making it a go-to choice for homeowners and contractors alike.

One of the standout features of the Bryant 558D is its high-efficiency rating. With SEER (Seasonal Energy Efficiency Ratio) ratings that can reach up to 18, it allows homeowners to enjoy significant savings on electricity bills while maintaining a comfortable indoor environment. The system is powered by advanced compressors that ensure optimal performance across various climate conditions, providing consistent cooling and heating as needed.

In terms of technology, the Bryant 558D incorporates a two-stage cooling system, which allows for better temperature control and humidity management. This technology enhances comfort by preventing the system from frequently starting and stopping, thus reducing wear and tear while extending the unit's lifespan. The variable-speed blower motor further contributes to this efficiency by adjusting its speed to meet the precise needs of the space, ensuring optimal air distribution and comfort.

Durability is another hallmark of the Bryant 558D. The unit is built with high-quality materials, including a galvanized steel cabinet coated with a sleek, weather-resistant finish that protects against rust and environmental wear. Its compact design makes installation seamless, allowing it to fit into various spaces without significant modifications.

The Bryant 558D also features smart technology compatibility, allowing users to integrate it with modern home automation systems. This connectivity provides homeowners with remote control capabilities, enabling them to regulate their home’s temperature via smartphone applications. This not only adds to convenience but also supports energy management strategies, as users can adjust settings based on occupancy and lifestyle patterns.

Finally, noise levels have been an important consideration in the design of the Bryant 558D. With innovative sound-dampening features, the unit operates quietly, making it an ideal choice for residential areas where noise sensitivity is paramount.

Overall, the Bryant 558D stands out as a sophisticated solution for heating and cooling needs, combining energy efficiency, advanced technology, durability, and user-friendly features. It is an excellent investment for those looking to enhance their home comfort while also being mindful of energy consumption.
Top Page Image Contents