TYPICAL WIRING SCHEMATIC (cont)

LEGEND FOR TYPICAL WIRING SCHEMATIC

IMPORTANT: Consult unit wiring label for actual wiring schematic.

549B036-120

AHA — Adjustable Heat Anticipator

AWG — American Wire Gage

C— Contactor, Compressor CAP — Capacitor

CB — Circuit Breaker

CC — Cooling Compensator CLO — Compressor Lockout COMP — Compressor Motor DB — Defrost Board

DFT — Defrost Thermostat ECON — Economizer

FPT — Freeze-Up Protection Thermostat FSS — Filter Status Switch

FU — Fuse GND — Ground

HC — Heater Contactor (Strip Heat) HPS — High-Pressure Switch

HR — Heater Relay

IFC — Indoor-Fan Contactor IFM — Indoor-Fan Motor LPS — Low-Pressure Switch

LSM — Limit Switch (Manual Reset) MTR — Motor

OAT — Outdoor-Air Thermostat OFM — Outdoor-Fan Motor

P — Plug

PL — Plug Assembly

QT — Quadruple Terminal

R — Relay

RAT — Return-Air Thermostat

NOTES:

1.If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.

2.Three phase motors are protected under primary single phasing conditions.

3.Thermostat: HH07AT170, 172, 174 Subbase: HH93AZ176

4.Set heat anticipator at .8 amp for 1st stage & .3 amp for 2nd stage.

5.Use copper conductors only.

6.Use copper, copper clad aluminum. or aluminum conductors.

7.

VOLTAGE

CB

MUST

RATING

HFG. PT. NO.

TRIP

24V

POTTER & BRUNFIELD

AMPS

W2BX-1024-3.2

3.2

 

RVS

— Reversing Valve Solenoid

SAT

— Supply Air Thermostat

SW2

— Switch, Fully Closed

SW3

— Switch, Minimum Vent Position

TB

— Terminal Block

TC

— Thermostat-Cooling

TH

— Thermostat-Heating

TRAN

— Transformer

 

 

 

Field Splice

 

 

 

Marked Wire

 

 

 

Terminal (Marked)

 

 

 

Terminal (Unmarked)

 

 

 

Terminal Block

 

 

 

Splice

 

 

 

Splice (Marked)

 

 

 

Factory Wiring

 

 

 

Field Control Wiring

 

 

 

Field Power Wiring

 

 

 

 

 

 

Accessory or Optional Wiring

 

 

 

To indicate common potential only,

 

 

 

not to represent wiring

96

Page 95 Page 97
Page 96
Image 96
Bryant 542J, 548F, 549B manual Must, Rating HFG. PT. no Trip, Potter & Brunfield Amps, Rvs, Sat, SW2, SW3
Page 95 Page 97

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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