On some units, the Outdoor Ambient Temperature (OAT) and Outdoor Coil Temperature (OCT) sensors may be attached permanently to the controller. The 47D40-801 includes replacement OAT and OCT sensors that plug onto the 2- and 3-pin connectors on the controller board.

Before removing the old controller, note the location of the OCT sensor on the outdoor coil. The new sensor should be attached to the coil in the same location, or as close as possible. The OAT sensor is typically 24-48” long, although some controllers have the sensor on the board. Placement of the OAT sensor is not as critical as the OCT sensor, but both sensors are required for the controller to operate.

Four metal standoffs are used to support and mount the control into the unit.

Board size is 3.375 in. x 3.625 in. and requires 1 inch of headroom (not including mounting).

Typical System Wiring Table

47D40

 

 

Terminal

Type

System Component Connection

C

0.25” QC

Reversing valve common

RV

0.25” QC

Reversing valve output

CC

0.25” QC

Compressor contactor coil

Yout

0.25” QC

Compressor call output

C (2)

0.25” QC

Common, 24VAC return

D

0.25” QC

Defrost output

Y

0.25” QC

Compressor call input

B

0.25” QC

Heating mode signal input

R (2)

0.25” QC

24VAC input

Fan (2)

0.25” QC

Outdoor fan control

OAT

2-pin connector

Outdoor ambient temperature sensor

OCT

3-pin connector

Outdoor coil temperature sensor

INSTALLATION

NOTE

All wiring should be installed according to local and national electrical codes and ordinances.

The 47D40-801 control may be mounted on any convenient surface using the four standoffs provided.

The control must be secured to an area that will experience a minimum of vibration and remain below the maximum ambient temperature rating of 150o F. The control is approved for minimum ambient temperatures of -40oF.

Any orientation is acceptable.

Refer to the wiring diagram and wiring table when connecting the 47D40-801 control to other components of the system.

UL approved, 105o C rated 18 gauge min., stranded 2/64” thick insulation wire is recommended for all low voltage safety circuit connections.

UL approved, 105o C rated 16 gauge min., stranded 2/64” thick insulation wire is recommended for all line voltage connections.

Following installation or replacement, follow appliance manufacturer’s recommended installation or service instructions to insure proper operation.

 

 

 

 

 

 

 

 

C

 

 

 

COMPRESSOR

R

 

S

 

HERM

FAN

S

R

OUTDOOR

 

 

 

C

 

 

 

 

 

 

C

FAN MOTOR

 

 

 

 

 

 

 

RUN CAPACITOR

 

 

 

CC

 

 

 

 

 

 

 

 

 

 

 

COMPRESSOR

 

 

 

 

TO THERMOSTAT

 

 

 

 

CONTACTOR

 

 

 

 

 

 

 

 

 

L1

 

L2

 

 

 

 

 

 

 

 

 

 

 

D

Y

C

B

R

 

 

 

 

 

 

 

 

 

 

 

FAN

 

 

 

 

 

 

Yout

 

 

 

 

 

 

 

 

 

 

CC

 

 

 

FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RV

 

 

 

OAT

 

 

 

REVERSING

 

 

 

 

 

 

 

 

 

 

RV

 

 

C

 

 

 

 

 

 

 

VALVE

 

 

 

 

 

 

 

OCT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Legend

 

 

 

 

 

 

 

 

 

 

 

Low Voltage

 

Line Voltage

Demand Defrost Control

Internal Control

 

Tracing

 

Fig 1. Typical System Wiring Diagram

3

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Image 3
White Rodgers 47D40-801 installation instructions Installation, Typical System Wiring Diagram
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47D40-801 specifications

The White Rodgers 47D40-801 is a robust and versatile digital thermostat designed for residential heating and cooling systems. This model exemplifies reliability and user-friendliness, making it a popular choice among homeowners and HVAC professionals alike. One of the standout features of the 47D40-801 is its ability to control multi-stage heating and cooling systems, which provides enhanced comfort and energy efficiency.

One of the primary technologies integrated into the White Rodgers 47D40-801 is its Digital Display. The easy-to-read LCD screen allows users to quickly assess the current temperature, set temperature, and overall system operation with clarity. The display also features backlighting, making it usable in various lighting conditions. In addition to its visual capabilities, the thermostat includes a built-in temperature sensor, ensuring accurate readings for more precise climate control.

The unit supports advanced programming capabilities, allowing homeowners to set up custom schedules for different times of the day or week. This feature not only optimizes comfort but also enhances energy savings by reducing heating and cooling when it is not needed. Users can select from different modes, such as heating, cooling, and auto changeover, ensuring that the home remains comfortable throughout the year.

Another notable characteristic is its compatibility with a variety of HVAC systems, including conventional and heat pump systems, which broadens its appeal to many users. The 47D40-801 also comes with built-in Wi-Fi connectivity options, allowing for remote control through compatible smart devices. This feature enables homeowners to make adjustments from anywhere, ensuring their space remains comfortable upon their arrival.

In terms of installation, the White Rodgers 47D40-801 is designed for easy setup, featuring color-coded wiring and a user-friendly manual. Additionally, it boasts a battery backup that maintains settings even during power outages, ensuring reliability.

In conclusion, the White Rodgers 47D40-801 thermostat stands out due to its combination of advanced features, user-friendly interface, and compatibility with a wide range of HVAC systems. With its programmable capabilities and modern technologies, it serves as an excellent choice for those looking to enhance their home's comfort while maintaining energy efficiency. Whether for a new installation or a replacement, this thermostat promises reliability and performance.
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