548J

n.Economizer controller shall accept a 2-10Vdc CO2 sensor input for IAQ/DCV control. In this mode, dampers shall modulate the outdoor-air damper to provide ventilation based on the sensor input.

o.Compressor lockout sensor shall open at 35_F (2_C) and closes at 50_F (10_C).

p.Actuator shall be direct coupled to economizer gear. No linkage arms or control rods shall be acceptable.

q.Economizer controller shall provide indications when in free cooling mode, in the DCV mode, or the exhaust fan contact is closed.

2.Two-Position Motorized Damper

a.Damper shall be a Two-Position Motorized Damper. Damper travel shall be from the full closed position to the field adjustable %-open setpoint.

b.Damper shall include adjustable damper travel from 25% to 100% (full open).

c.Damper shall include single or dual blade, gear driven dampers and actuator motor.

d.Actuator shall be direct coupled to damper gear. No linkage arms or control rods shall be acceptable.

e.Damper will admit up to 100% outdoor air for applicable rooftop units.

f.Damper shall close upon indoor (evaporator) fan shutoff and/or loss of power.

g.The damper actuator shall plug into the rooftop unit’s wiring harness plug. No hard wiring shall be required.

h.Outside air hood shall include aluminum water entrainment filter

3.Manual damper

a.Manual damper package shall consist of damper, air inlet screen, and rain hood which can be preset to admit up to 50% outdoor air for year round ventilation.

4.Head Pressure Control Package

a.Controller shall control coil head pressure by condenser-fan speed modulation or condenser-fan cycling and wind baffles.

b.Shall consist of solid-state control and condenser-coil temperature sensor to maintain condensing temperature between 90_F (32_C) and 110_F (43_C) at outdoor ambient temperatures down to -20_F (-29_C).

5.Condenser Coil Hail Guard Assembly

a.Shall protect against damage from hail.

b.Shall be louvered design.

6.Unit-Mounted, Non-Fused Disconnect Switch:

a.Switch shall be factory-installed, internally mounted.

b.National Electric Code (NEC) and UL approved non-fused switch shall provide unit power shutoff.

c.Shall be accessible from outside the unit

d.Shall provide local shutdown and lockout capability.

7.Convenience Outlet:

a.Powered convenience outlet.

(1.) Outlet shall be powered from main line power to the rooftop unit.

(2.) Outlet shall be powered from line side or load side of disconnect by installing contractor, as required by code. If outlet is powered from load side of disconnect, unit electrical ratings shall be UL certified and rated for additional outlet amperage.

(3.) Outlet shall be factory-installed and internally mounted with easily accessible 115-v female receptacle. (4.) Outlet shall include 15 amp GFI receptacles with independent fuse protection.

(5.) Voltage required to operate convenience outlet shall be provided by a factory-installed step-down trans- former.

(6.) Outlet shall be accessible from outside the unit.

b.Non-Powered convenience outlet.

(1.) Outlet shall be powered from a separate 115-120v power source.

(2.) A transformer shall not be included.

(3.) Outlet shall be factory-installed and internally mounted with easily accessible 115-v female receptacle. (4.) Outlet shall include 15 amp GFI receptacles.

(5.) Outlet shall be accessible from outside the unit.

8.Thru-the-Base Connectors:

a.Kits shall provide connectors to permit electrical connections to be brought to the unit through the unit base- pan.

b.Minimum of three connection locations per unit.

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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.