9.Fan/Filter Status Switch:

a.Switch shall provide status of indoor evaporator fan (ON/OFF) or filter (CLEAN/DIRTY).

b.Status shall be displayed either over communication bus (when used with direct digital controls) or with an indicator light at the thermostat.

10.Propeller Power Exhaust:

a.Power exhaust shall be used in conjunction with an integrated economizer.

b.Independent modules for vertical or horizontal return configurations shall be available.

c.Horizontal power exhaust is shall be mounted in return ductwork.

d.Power exhaust shall be controlled by economizer controller operation. Exhaust fans shall be energized when dampers open past the 0-100% adjustable setpoint on the economizer control.

11.Roof Curbs (Vertical):

a.Full perimeter roof curb with exhaust capability providing separate air streams for energy recovery from the exhaust air without supply air contamination.

b.Formed galvanized steel with wood nailer strip and shall be capable of supporting entire unit weight.

c.Permits installation and securing of ductwork to curb prior to mounting unit on the curb.

12.High-Static Indoor Fan Motor(s) and Drive(s) (04-09):

a.High-static motor(s) and drive(s) shall be factory-installed to provide additional performance range.

13.Thru-the-Bottom Utility Connectors:

a.Kit shall provide connectors to permit electrical connections to be brought to the unit through the basepan.

14.Fan/Filter Status Switch:

a.Provides status of indoor (evaporator) fan (ON/ OFF) or filter (CLEAN/DIRTY). Status shall be displayed over communication bus when used with direct digital controls or with an indicator light at the thermostat.

15.Outdoor Air Enthalpy Sensor:

a.The outdoor air enthalpy sensor shall be used to provide single enthalpy control. When used in conjunction with a return air enthalpy sensor, the unit will provide differential enthalpy control. The sensor allows the unit to determine if outside air is suitable for free cooling.

16.Return Air Enthalpy Sensor:

a.The return air enthalpy sensor shall be used in conjunction with an outdoor air enthalpy sensor to provide dif- ferential enthalpy control.

17.Indoor Air Quality (CO2) Sensor:

a.Shall be able to provide demand ventilation indoor air quality (IAQ) control.

b.The IAQ sensor shall be available in duct mount, wall mount, or wall mount with LED display. The setpoint shall have adjustment capability.

18.Smoke detectors:

a.Shall be a Four-Wire Controller and Detector.

b.Shall be environmental compensated with differential sensing for reliable, stable, and drift-free sensitivity.

c.Shall use magnet-activated test/reset sensor switches.

d.Shall have tool-less connection terminal access.

e.Shall have a recessed momentary switch for testing and resetting the detector.

f.Controller shall include:

(1.) One set of normally open alarm initiation contacts for connection to an initiating device circuit on a fire alarm control panel.

(2.) Two Form-C auxiliary alarm relays for interface with rooftop unit or other equipment.

(3.) One Form-C supervision (trouble) relay to control the operation of the Trouble LED on a remote test/reset station.

(4.) Capable of direct connection to two individual detector modules.

(5.) Can be wired to up to 14 other duct smoke detectors for multiple fan shutdown applications.

19.Time Guard

a.Shall prevent compressor short cycling by providing a 5-minute delay (±2 minutes) before restarting a com- pressor after shutdown for any reason.

b.One device shall be required per compressor.

20.Electric Heat:

a.Heating Section

(1.) Heater element open coil resistance wire, nickel-chrome alloy, 0.29 inches inside diameter, strung through ceramic insulators mounted on metal frame. Coil ends are staked and welded to terminal screw slots.

548J

75

Page 75
Image 75
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.