Guide Specifications 542J150,180 Units | Bryant 548F, 549B specs

GUIDE SPECIFICATIONS — 542J150,180 UNITS

542J150,180

PACKAGED ROOFTOP AIR-TO-AIR HEAT PUMP — CON- STANT VOLUME APPLICATION

HVAC GUIDE SPECIFICATIONS

SIZE RANGE: 12 to 15 TONS, NOMINAL (COOLING) 136,000 to 172,000 BTUH, NOMINAL (INPUT HEATING)

BRYANT MODEL NUMBER: 542J

PART 1 — GENERAL

1.01SYSTEM DESCRIPTION

Outdoor rooftop mounted, electrically controlled air-to-air heat pump unit utilizing reciprocating, semi-hermetic com- pressor(s) for cooling duty and electric resistance coils for heating duty. Unit shall discharge supply air vertically or horizontally (with horizontal supply/return adapter assem- bly or roof curb) as shown on contract drawings.

1.02QUALITY ASSURANCE

A.Unit shall be rated in accordance with ARI Standard 340. Designed in accordance with UL Standard 1995.

B.Unit shall be designed to conform to ASHRAE 15, latest revision.

C.Unit shall be UL-tested and certified in accordance with ANSI Z21.47 Standards and UL-listed and certified under Canadian standards as a total package for safety requirements.

D.Roof curb shall be designed to conform to NRCA Standards.

E.Insulation and adhesive shall meet NFPA 90A require- ments for flame spread and smoke generation.

F.Unit casing shall be capable of withstanding 500-hour salt spray exposure per ASTM B117 (scribed specimen).

G.Unit shall be designed in accordance with ISO 9001, and shall be manufactured in a facility registered to ISO 9002/ BS5750, Part 2.

H.Each unit shall be subjected to a completely automated run testing on the assembly line. Units contain a factory- supplied printout indicating tested pressures, amperages, data, and inspectors; providing certification of the unit status at the time of manufacture.

1.03 DELIVERY, STORAGE, AND HANDLING

Unit shall be stored and handled per manufacturer’s recommendations.

PART 2 — PRODUCTS

2.01EQUIPMENT (STANDARD)

A.General:

Factory assembled, single-piece heat pump unit. Con- tained within the unit enclosure shall be all factory wiring, piping, controls, refrigerant charge (R-22), and special features required prior to field start-up.

B.Unit Cabinet:

1.Unit cabinet shall be constructed of galvanized steel, and shall be bonderized and coated with a pre- painted baked enamel finish on all externally exposed surfaces.

2.Indoor fan compartment interior cabinet surfaces shall be insulated with a minimum 1/2-in. thick, 1 lb. density, flexible fiberglass insulation, neoprene coated on the air side.

3.Cabinet panels shall be easily removable for servicing.

4.Holes shall be provided in the base rails for rigging shackles to facilitate maneuvering and overhead rigging.

5.Unit shall have a factory-installed, sloped conden- sate drain pan made of a non-corrosive material, pro- viding a minimum 3/4-in. 14 NPT connection with both vertical and horizontal drains, and shall comply with ASHRAE Standard 62.

6.Unit shall have a factory-installed filter access panel to provide filter access with tool-less removal.

7.Unit shall have standard thru-the-bottom power con- nection capability (accessory kit is required).

C.Fans:

1.Indoor Fan:

a.Fan shall be belt driven with an adjustable-pitch motor pulley. The standard fan drive shall have a factory-installed low-medium static pressure fan drive. The alternate fan drive option shall have a factory-installed high static pressure fan drive.

b.Fan wheel shall be double-inlet type with forward- curved blades.

c.Bearings shall be sealed, permanently lubricated ball-bearing type for longer life and lower maintenance.

d.Bearings shall be pillow block type (180 only).

2.Indoor fan shall be made from steel with a corrosion- resistant finish and shall be dynamically balanced.

3.Outdoor fan shall be of the direct-driven (with totally enclosed motors) propeller type and shall discharge air vertically.

4.Outdoor fan shall have aluminum blades riveted to corrosion-resistant steel spiders and shall be dynam- ically balanced.

D.Compressor(s):

1.Reciprocating semi-hermetic compressors with factory-installed crankcase heaters.

2.Factory mounted on rubber grommets and internally spring mounted for vibration isolation.

3.On independent circuits (180).

4.The size 150 unit semi-hermetic compressor shall be equipped with an electric unloader for capacity control.

E.Coils:

1.Standard indoor and outdoor coils shall have copper or aluminum plate fins mechanically bonded to seamless internally grooved copper tubes with all joints brazed.

2.Coils:

a.Copper-fin coils shall be constructed of copper fins mechanically bonded to copper tubes and copper tube sheets. Galvanized steel tube sheets shall not be acceptable. A polymer strip shall pre- vent coil assembly from contacting the sheet metal coil pan to minimize potential for galvanic corrosion between coil and pan. All copper con- struction shall provide protection in moderate coastal environments.

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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.