TYPICAL WIRING SCHEMATIC

LEGEND

AHA — Adjustable Heat Anticipator

AWG — American Wire Gage

C— Contactor, Compressor CAP — Capacitor

CB — Circuit Breaker

CC — Cooling Capacitor

CH — Crankcase Heater

COMP — Compressor Motor

D— Diode

DB

—

Defrost Board

DFT

—

Defrost Thermostat

EC

—

Enthalpy Control

ECON

—

Economizer

EPS

— Emergency Power Supply

 

 

(Nine-Volt Battery)

ER

— Economizer Relay

FSS

— Filter Status Switch

FPT

— Freeze-Up Protection Thermostat

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

RVS

— Reversing Valve Solenoid

SAT

— Supply-Air

 

 

Thermostat

ST

— Start Thermistor

SW1

— Switch Fully Open

SW2

— Switch Fully Closed

SW3

— Switch Min.

 

 

Vent Position

SW4

— Switch Max.

 

 

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.

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.Thermostat: HH07AT170, 172, 174.

Subbase: HH93AZ176.

3.Set heat anticipator at .8 amp for first stage and .3 amp for second stage.

4.Use copper conductors only.

5.Use copper, copper-clad aluminum or aluminum conductors.

6.VOLTAGE CB

RATING

MFG. PT. NO.

MUST

 

 

TRIP

 

POTTER &

AMPS

24V

BRUMFIELD

 

 

W28X-1024-3.2

3.2

548F036-120

548F036-072

65

Page 64 Page 66
Page 65
Image 65
Bryant 549B, 542J, 548F manual Typical Wiring Schematic, SW4
Page 64 Page 66

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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