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

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

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