GUIDE SPECIFICATIONS — 548F AND 549B036-120 UNITS (cont)

K.Electrical Requirements:

All unit power wiring shall enter unit cabinet at a single factory-predrilled location.

L.Motors:

1.Compressor motors shall be cooled by refrigerant gas passing through motor windings and shall have line break thermal and current overload protection.

2.Indoor-fan motor shall have permanently lubricated bearings and inherent automatic-reset thermal over- load protection.

3.Totally enclosed outdoor-fan motor shall have perma- nently lubricated bearings, and inherent automatic- reset thermal overload protection.

M.Special Features:

Certain features are not applicable when the features designated * are specified. For assistance in amending the specifications, contact your local Bryant Sales Office.

1.Roof Curbs (Horizontal and Vertical):

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

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

*2. Integrated Economizers:

a. Integrated integral modulating type capable of simultaneous economizer and compressor operation.

b. Includes all hardware and controls to provide cooling with outdoor air.

c.Equipped with low-leakage dampers, not to exceed 3% leakage at 1 in. wg pressure differential.

d.Capable of introducing up to 100% outdoor air.

e.EconoMi$er shall be equipped with a barometric relief damper.

f.Designed to close damper(s) during loss-of- power situations with spring return built into motor.

g.Dry bulb outdoor-air temperature sensor shall be provided as standard. Enthalpy, differential tem- perature, and differential enthalpy control shall be provided as an option.

*5. 100% Two-Position Damper:

a.Two-position damper package shall include single blade damper and motor. Admits up to 100% out- door air.

b.Damper shall close upon indoor (evaporator) fan shutoff.

c.Designed to close damper during loss of power situations.

d.Equipped with 15% barometric relief damper.

*6. 25% Two-Position Damper:

a.Two-position damper package shall include single blade damper and motor. Admits up to 25% out- door air.

b.Damper shall close upon indoor fan shutoff.

*7. Head Pressure Control Package:

Consists of solid-state control and condenser-coil temperature sensor to maintain condensing temper- ature between 90 F and 110 F at outdoor ambient temperatures down to –20 F by condenser-fan speed modulation or condenser-fan cycling and wind baffles.

*8. Electric Resistance Heaters:

a.Open wire nichrome elements with all necessary safety operating controls.

b.UL listed and indicated on basic unit information plate.

c.Available in multiples to match heating require- ments.

d.Single point kits available for each heater when required.

*9. Electronic Programmable Thermostat:

Capable of using deluxe full-featured electronic ther- mostat. Shall use built-in compressor cycle delay control for both heating and cooling duty.

*10. Thermostat and Subbase:

Provides staged cooling and heating automatic (or manual) changeover, fan control, and indicator light.

*11. Outdoor Coil Hail Guard Assembly:

Hail guard shall protect against damage from hail and flying debris.

548F/549B036-120

h. EconoMi$er is a gear-driven parallel blade design.

i.EconoMi$er shall provide control of internal build- ing pressure through its accessory two-stage power exhaust function.

j.EconoMi$er shall be capable of control from a 4 to 20 mA signal.

3.25% Manual Outdoor-Air Damper:

Manual damper package shall consist of damper, birdscreen, and rainhood which can be preset to admit up to 25% outdoor air for year-round ventilation.

*4. 50% Manual Outdoor-Air Damper:

*12. Unit-Mounted, Non-Fused Disconnect Switch:

Shall be factory-installed, internally mounted. NEC and UL approved non-fused switch shall provide unit power shutoff. Shall be accessible from outside the unit and shall provide power off lockout capability.

*13. Convenience Outlet:

Shall be factory-installed and internally mounted with easily accessible 115-v female receptacle. Shall include 15 amp GFI receptacle with independent fuse protection. Voltage required to operate conve- nience outlet shall be provided by a factory-installed step-down transformer. Shall be accessible from out- side the unit.

*14. Outdoor Coil Grille:

Manual damper package shall consist of damper,

The grille protects the outdoor coil from damage by

birdscreen, and rainhood which can be preset

large objects without increasing unit clearances.

to admit up to 50% outdoor air for year-round

 

ventilation.

 

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Bryant 542J manual Guide Specifications 548F and 549B036-120 Units
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549B, 548F, 542J specifications

Bryant 542J is a high-efficiency gas furnace that stands out for its reliability and advanced heating technologies. Designed to deliver consistent warmth and comfort in residential settings, it combines innovative engineering with energy-efficient features.

One of the key characteristics of the Bryant 542J is its two-stage heating capability. This means that the furnace can adjust its heat output according to the heating demands of your home. During milder weather, it operates at a lower stage, consuming less energy while still maintaining a comfortable environment. When the temperatures drop, the furnace shifts to its higher capacity, providing the necessary warmth efficiently. This not only enhances comfort but also contributes to lower energy bills.

In addition to its two-stage operation, the Bryant 542J also incorporates a variable-speed blower motor. This technology allows the furnace to adjust the airflow depending on the heating requirements, ensuring an even distribution of warm air throughout the home. The variable-speed blower also operates more quietly than conventional fixed-speed motors, creating a serene indoor environment.

Energy efficiency is a hallmark of the Bryant 542J, boasting an Annual Fuel Utilization Efficiency (AFUE) rating of up to 96.5%. This impressive rating means that a significant portion of the energy consumed is effectively converted into usable heat, resulting in substantial savings on heating costs over time. Furthermore, the furnace is equipped with a sealed combustion system that draws air from outside the home, minimizing energy waste and improving indoor air quality.

Diagnostic features are another highlight of the Bryant 542J, which come equipped with SmartEvap technology. This allows the unit to self-diagnose potential issues, providing homeowners with peace of mind and simplifying maintenance procedures.

Durability is also a key feature of the Bryant 542J. It is constructed with high-quality materials designed to withstand harsh winter conditions, ensuring a long lifespan and reliable performance. Its compact design also allows for flexible installation, making it suitable for various residential layouts.

In summary, the Bryant 542J is more than just a gas furnace; it is a sophisticated heating solution that combines efficiency, comfort, and reliability. With features such as two-stage heating, a variable-speed blower, high AFUE ratings, and advanced diagnostics, it is an excellent choice for homeowners seeking an efficient and effective heating system.
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