White Rodgers 50A66-743 installation instructions Typical System Wiring Diagram

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WIRING

 

TYPICAL SYSTEM WIRING DIAGRAM

 

HOT

 

NEUTRAL

(LINE)

120 VAC

(LINE)

 

 

 

 

 

24 VAC CLASS II

 

 

 

 

TRANSFORMER

 

TH

24 VAC

TR

 

 

50A66

 

 

 

 

FAN

 

 

 

 

COOL

 

 

 

 

HEAT

 

 

CIRCULATOR

 

PARK

 

 

 

 

 

BLOWER

 

PARK

 

 

 

 

 

 

 

LINE

 

 

 

 

XFMR

 

 

 

 

EAC

 

 

 

 

HUM

 

 

 

 

PARK

 

INDUCER

 

 

 

 

 

 

IND

 

 

 

 

IGN

 

 

 

HUMIDIFIER

IGN N

 

IGNITOR

 

IND N

 

 

 

 

 

ELECTRONIC

120 VOLT NEUTRAL

 

 

 

AIR CLEANER

 

 

 

 

 

Y

 

Y

 

 

W

 

W

COMPRESSOR

 

 

 

 

CONTACTOR

 

G

 

G

 

24 V

R

 

R

 

 

 

THERMOSTAT

 

HUMIDIFIER

C

 

 

 

 

 

 

FLAME

24 V HUM

(E2)

 

 

FP

(E33)

 

 

SENSOR

PRESSURE SWITCH (N. O.)

PROBE

PSI

 

 

 

 

 

 

PSO

 

 

 

 

HLI

 

 

 

 

HLO

 

HIGH LIMIT

AUX. HIGH

 

RO OUT

 

GND

 

(N. C.)

LIMIT (N. C.)

 

RO IN

 

ROLLOUT

2 STAGE

 

MV LO

 

(N. C.)

 

 

GAS

 

MV HI

 

 

 

MV COM

 

VALVE

 

TR

 

 

 

 

TH

 

 

 

LEGEND

[12-Pin Connector]

 

 

 

 

 

 

Low Voltage (24 VAC)

 

 

 

HLO

PSO

HLI

PSI

 

 

 

 

 

 

 

Line Voltage (120 VAC)

 

 

 

MV

RO

GND

RO

 

 

 

LO

OUT

OUT

 

 

 

 

 

N. C. = Normally closed switch

 

N

N

 

 

COM

 

 

IND IGN

IND

IGN

TH

TR

MV

MV

N. O. = Normally open switch

4-Pin Connector

12-Pin Connector

 

4

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Contents Installation Instructions PrecautionsContents DescriptionSpecifications Electrical Ratings @ 77F 25C Operating Temperature RangeTiming Specifications Humidity RangeMounting and Wiring InstallationAny orientation is acceptable Wiring Typical System Wiring DiagramTypical System Wiring Table System ComponentTerminal ConnectionOperation Option Switches Heat ModeCool Mode Manual FAN on ModeSystem Lockout Features System Lockout and Diagnostic FeaturesDiagnostic Features Troubleshooting Diagnostic Table

50A66-743 specifications

The White Rodgers 50A66-743 is a state-of-the-art heating and cooling thermostat designed for maximum comfort and efficiency in residential environments. This versatile device is known for its reliability and user-friendly features, making it a popular choice among homeowners and HVAC professionals alike.

One of the key features of the 50A66-743 thermostat is its programmable functionality. Users can easily set temperature schedules for different times of the day, ensuring optimal energy consumption while maintaining a comfortable home environment. With the option to program up to four different time periods per day, this thermostat allows for customizable comfort tailored to the homeowner's lifestyle.

The 50A66-743 employs advanced technology to facilitate precise temperature control. Its microprocessor-based design ensures accurate readings and smooth operation, allowing the system to maintain the set temperature with minimal fluctuation. This not only enhances comfort but also promotes energy efficiency, which can result in reduced utility bills.

Another notable characteristic of the White Rodgers 50A66-743 is its compatibility with various heating and cooling systems. It can easily integrate with single-stage and multi-stage systems, including gas, oil, and electric furnaces, as well as heat pumps. This versatility makes it an ideal choice for diverse HVAC applications.

User convenience is a top priority with this model, and it is equipped with a clear, easily readable display that provides real-time temperature readings. The backlit screen enhances visibility, making it easy for users to check the status of their heating or cooling systems, even in low-light conditions.

Additionally, the 50A66-743 features a simple interface with intuitive buttons that allow for quick adjustments to temperature settings. This straightforward design minimizes the learning curve for new users, making it accessible for families of all ages.

The thermostat also includes a filter change reminder, which helps homeowners stay on top of maintenance tasks, ensuring optimal system performance. Regular filter changes are crucial for maintaining air quality and efficiency, and this alert serves as a helpful nudge to keep homeowners proactive about their HVAC systems.

In summary, the White Rodgers 50A66-743 thermostat combines advanced technology, user-friendly features, and compatibility with various HVAC systems, making it an excellent choice for those seeking comfort and efficiency in their homes. Its programmable functionality, precise temperature control, and convenient design ensure that users can easily manage their home’s climate while saving on energy costs.