3.Shall consist of factory-installed, low velocity, throw-away 2-in. thick fiberglass filters.

4.Filters shall be standard, commercially available sizes.

5.Only one size filter per unit is allowed.

23 81 19.13.M. Evaporator Fan and Motor

1.Evaporator fan motor:

a.Shall have permanently lubricated bearings.

b.Shall have inherent automatic-reset thermal overload protection or circuit breaker.

c.Shall have a maximum continuous bhp rating for continuous duty operation; no safety factors above that rating shall be required.

2.Electric Drive (Direct Drive) X13 – 5 Speed/Torque Evaporator Fan:

a.Multi speed motor with easy quick adjustment settings.

b.Blower fan shall be double-inlet type with forward-curved blades.

c.Shall be constructed from steel with a corrosion resistant finish and dynamically balanced.

d.Standard on all 04-06 models with 208/230/1/60 operation

e.Standard on all 04-06 3-phase models, with optional belt drive.

3.Belt-driven Evaporator Fan:

a.Belt drive shall include an adjustable-pitch motor pulley.

b.Shall use sealed, permanently lubricated ball-bearing type.

c.Blower fan shall be double-inlet type with forward-curved blades.

d.Shall be constructed from steel with a corrosion resistant finish and dynamically balanced.

e.Standard on all 07 size models. Optional on all 04-06 3-phase models.

23 81 19.13.N. Condenser Fans and Motors

1.Condenser fan motors:

a.Shall be a totally enclosed motor.

b.Shall use permanently lubricated bearings.

c.Shall have inherent thermal overload protection with an automatic reset feature.

d.Shall use a shaft-down design on 04 to 09 models.

2.Condenser Fans:

a.Shall be a direct-driven propeller type fan.

b.Shall have aluminum blades riveted to corrosion-resistant steel spiders and shall be dynamically balanced. 23 81 19.13.O. Special Features, Options and Accessories

1.Integrated Economizers:

a.Integrated, gear-driven parallel modulating blade design type capable of simultaneous economizer and com- pressor operation.

b.Independent modules for vertical or horizontal return configurations shall be available. Vertical return modules shall be available as a factory installed option.

c.Damper blades shall be galvanized steel with composite gears. Plastic or composite blades on intake or return shall not be acceptable.

d.Shall include all hardware and controls to provide free cooling with outdoor air when temperature and/or hu- midity are below setpoints.

e.Shall be equipped with gear driven dampers for both the outdoor ventilation air and the return air for positive air stream control.

f.Shall be equipped with low-leakage dampers, not to exceed 2% leakage at 1 in. wg pressure differential.

g.Shall be capable of introducing up to 100% outdoor air.

h.Shall be equipped with a barometric relief damper capable of relieving up to 100% return air.

i.Shall be designed to close damper(s) during loss-of-power situations with spring return built into motor.

j.Dry bulb outdoor-air temperature sensor shall be provided as standard. Outdoor air sensor setpoint shall be adjustable and shall range from 40 to 100_F / 4 to 38_C. Additional sensor options shall be available as ac- cessories.

k.The economizer controller shall also provide control of an accessory power exhaust unit function. Factory set at 100%, with a range of 0% to 100%.

l.The economizer shall maintain minimum airflow into the building during occupied period and provide design ventilation rate for full occupancy. A remote potentiometer may be used to override the damper setpoint.

m.Dampers shall be completely closed when the unit is in the unoccupied mode.

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Bryant 548J manual

548J specifications

The Bryant 548J is a high-efficiency gas furnace that combines advanced features and technologies to provide exceptional heating performance. Designed for residential applications, the furnace is notable for its ability to deliver consistent warmth while ensuring energy efficiency and reliability.

One of the main features of the Bryant 548J is its ultra-high efficiency rating, which allows homeowners to save significantly on energy costs. With an Annual Fuel Utilization Efficiency (AFUE) rating of up to 96.5%, this furnace is designed to convert a large portion of fuel into usable heat. This is a remarkable characteristic that not only reduces utility bills but also contributes to a lower environmental footprint.

The 548J is equipped with a modulating gas valve and a variable-speed blower motor. The modulating gas valve enables the furnace to adjust its heating output based on real-time temperature demands, ensuring a more precise heating experience. This results in reduced temperature fluctuations within the home, providing a comfortable living environment. The variable-speed blower motor works in tandem with the modulating valve, facilitating improved air circulation and efficient temperature control.

Additionally, the Bryant 548J features a durable and compact design, making it suitable for various installation spaces. Its quality construction ensures longevity, while the optional stainless steel heat exchanger enhances its reliability. The furnace also includes a quiet operation mode, which minimizes noise levels, ensuring that the unit works quietly in the background without disturbing the household's peace.

Integration with smart home technology is another advantage of the Bryant 548J. Homeowners have the option to connect the furnace to a Wi-Fi-enabled thermostat, allowing for remote temperature control and monitoring. This feature offers enhanced convenience and the ability to optimize energy use according to a homeowner’s schedule.

For peace of mind, the Bryant 548J comes with a range of warranties, protecting the consumer's investment. Bryant’s commitment to quality is reflected in their extensive primary heating testing procedures, which ensure that each unit meets strict performance criteria before it reaches the customer.

In summary, the Bryant 548J is an efficient and reliable gas furnace that embodies advanced heating technology. With features such as high AFUE ratings, modulating gas valves, variable-speed blowers, and smart home compatibility, it stands out as a formidable option for modern residential heating solutions.