APPLICATION DATA

1.CONDENSATE DRAIN PAN — A sloped condensate drain pan is supplied on all units. The condensate drain pan must be externally trapped. Condensate drains are located on both the bottom and end of the unit. The bottom drain can be used for thru-the-curb connections.

2.DUCTWORK — All ductwork must be attached to flanges. If no flanges are present, they must be field supplied. Secure vertical discharge ductwork to roof curb. For horizontal dis- charge applications, attach ductwork to flanges. Field- supplied flanges can be attached to horizontal discharge openings and all ductwork attached to flanges.

3.THRU-THE-BOTTOM SERVICE CONNECTIONS — Thru- the-bottom connections allow field power wires and control wires to enter through the basepan.

4.THERMOSTAT — Use of 2-stage cooling thermostat is recommended for all units equipped with economizer.

5.HEATING-TO-COOLING CHANGEOVER — All units are automatic changeover from heating to cooling when auto- matic changeover thermostat and subbase are used.

6.AIRFLOW — Units are draw-thru on cooling and blow-thru on heating.

7.MAXIMUM AIRFLOW — To minimize possibility of conden- sate blow-off from evaporator, airflow through units should not exceed 500 cfm/ton.

8.MINIMUM AIRFLOW — Minimum airflow for cooling is 300 cfm/ton for unit sizes 036-240, 280 cfm/ton for size 300.

9.MINIMUM AMBIENT OPERATING TEMPERATURE — Minimum operating temperature for standard 036-150 units is 25 F, for standard 155-300 units is 40 F. With accessory Motormaster® or Motormaster IV control, units can operate at outdoor temperatures down to –20 F.

10.MAXIMUM OPERATING OUTDOOR-AIR TEMPERATURE

Maximum outdoor-air operating temperature for cooling is 125 F (115 F for 558F036-150 units).

11.MOTOR DATA — Due to Bryant’s internal unit design (draw- thru over the motor), air path, and specially designed motors, the full horsepower (maximum continuous bhp) listed in the Physical Data table and in each Fan Perfor- mance table can be utilized with extreme confidence.

Using Bryant motors to the values listed in the Physical Data, Fan Performance, and Evaporator-Fan Motor Data tables will not result in nuisance tripping or premature motor failure. In addition, the unit warranty will not be affected.

12.PERFECT HUMIDITY™ DEHUMIDIFICATION PACKAGE

This option provides greater dehumidification by further subcooling the hot liquid refrigerant leaving the condenser coil. The Perfect Humidity package consists of a subcooling coil located on the leaving-air side of the evaporator coil. The location of the coil in the indoor airstream enhances the latent capacity of the rooftop units by up to 40%.

Many buildings suffer damage or have poor indoor-air qual- ity due to overly humid conditions. Building humidity must be controlled for the following reasons:

a.INDOOR-AIR QUALITY — Humidity is a major factor in the growth and propagation of mold and mildew in a building. The mold and mildew can spread quickly and grow in carpets and ductwork and on walls, and often causes cases of sick building syndrome. This syndrome can lead to employee absenteeism due to illness, lower worker productivity, and increased health care costs. The American Society of Heating, Refrigeration, and Air Con- ditioning Engineers (ASHRAE) recommends that relative humidity levels in buildings be maintained below 70%.

b.COMFORT LEVELS — High humidity levels cause the occupied space to become uncomfortable, because humidity interferes with the body’s natural cooling pro- cess (evaporation at the skin surface).

1'-10 11/16''

6'-2 3/8'' MAX.

MAX.

5'-9 3/16'' MAX.

5 3/16''

1'-0 3/16''

4'-6 13/16'' 1'-7 15/16''

1'-0 3/16''

24'' MIN.

B

B

A

NOTE:

1.Do not drill in this area, damage to basepan may result in water leak.

2.A 90-degree elbow must be provided in the supply ductwork to comply with UL (Underwriters’ Laboratories) codes for use with electric heat.

Concentric Duct Distribution —

Unit Sizes 155-300

A

BAFFLE

Shaded area indicates block-off panels.

NOTE: Dimensions A, Aand B, Bare obtained from field-supplied ceiling diffuser.

CAUTION: Concentric ducts may only be installed on units without electric heat. Personal injury or unit damage may result.

Concentric Duct Details — Unit Sizes 155-300

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Bryant 558F, 551B Application Data, Maximum Operating Outdoor-Air Temperature, Perfect Humidity Dehumidification Package

551A, 551B, 558F specifications

The Bryant 551B and 551C are two highly efficient air conditioning units designed to provide optimal comfort in residential settings. Known for their reliability and performance, these models are part of Bryant's esteemed line of heating and cooling solutions.

One of the standout features of the Bryant 551B is its two-stage cooling system, which allows for better humidity control and increased comfort. This ensures that homeowners can enjoy consistent temperatures while reducing energy consumption. The unit operates quietly, thanks to its noise-reducing technology, making it an ideal choice for bedrooms and living spaces.

On the other hand, the Bryant 551C builds upon this foundation with its variable-speed compressor. This technology allows the unit to adjust its cooling output according to the specific needs of the home. This results in seamless operation and even greater energy efficiency. Both models also incorporate Bryant's advanced control capabilities, which allow users to monitor and adjust settings remotely via smart devices, adding a layer of convenience and modernity to home climate control.

With an emphasis on durability, both the 551B and 551C feature a galvanized steel cabinet that protects against weather-related damage. The powder coat finish further enhances their resistance to rust and corrosion, ensuring a long lifespan and minimal maintenance.

Another significant characteristic of these units is their excellent Seasonal Energy Efficiency Ratio (SEER) ratings. The 551B boasts a SEER rating of up to 16, while the 551C takes it even further with ratings exceeding 20. This efficiency not only translates to lower energy bills for homeowners but also contributes to a reduced carbon footprint, making these units environmentally friendly options.

Both models are also designed to operate with eco-friendly refrigerants, aligning with modern energy standards and regulations aimed at reducing greenhouse gas emissions.

In summary, the Bryant 551B and 551C are exemplary choices for homeowners looking for reliable, efficient, and high-performing air conditioning solutions. With features such as two-stage and variable-speed compressors, advanced smart technology, and robust construction, these models stand out in the competitive HVAC market. They promise a comfortable indoor environment along with significant energy savings, making them a wise investment for the future.