White Rodgers Radio 47D40 801 User Manual

47D40-801  
Demand Defrost Control  
INSTALLATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE  
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL  
INJURY AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
The 47D40-801 control is a microprocessor-based demand  
defrost controller intended for Rheem heat pump systems.  
This controller uses basic differential temperature means to  
detect degradation of system performance due to ice build-up  
on the outdoor coil. The controller uses “self-calibrating” prin-  
ciples to calibrate to the heat pump system. The defrosting is  
performed by reversing the refrigerant direction of flow.  
The 47D40-801 is meant to replace the following controllers  
in Rheem heat pump systems:  
47-21517-16  
47-21517-17  
47-21517-18  
47-21517-23  
47-21517-24  
47-21517-11  
47-21517-14  
47-21517-13  
47-21517-82  
47-21517-88  
47-102685-01  
47-102685-03  
47-102684-01  
47-102684-03  
47-102684-83  
DDL-013102-1RH  
DDL-017002-2RH  
DDL-017102-1RH  
DDL-017702-1RH  
DDL-117702-3RH  
DDL-013002-0RH  
DDL-013002-1RH  
47D40-801  
PRECAUTIONS  
WARNING  
• Topreventelectricalshockand/orequipmentdamage,  
disconnect electric power to system at main fuse or  
circuit breaker box until installation is complete.  
CAUTION  
• This control is intended only for Rheem heat pump  
systems.  
!
!
• Replace 47D40-801 control as a unit - no user service-  
able parts.  
• This control is not intended for use in locations where  
it may come in direct contact with water. Suitable  
protectionsmustbeprovidedtoshieldthecontrolfrom  
exposure to water (dripping, spraying, rain, etc.)  
If in doubt about whether your wiring is millivolt, line or low  
voltage, have it inspected by a qualified heating and air  
conditioning contractor or licensed electrician.  
• Label all wires prior to disconnection when servicing  
controls.Wiring errors can cause improper or loss of  
heat pump operation and/or shock hazard.  
Do not exceed the specification ratings.  
All wiring must conform to local and national electrical codes  
and ordinances.  
• Followinginstallationorreplacement,followappliance  
manufacturer’s recommended installation/service  
instructions to insure proper operation.  
This control is a precision instrument, and should be handled  
carefully. Rough handling or distorting components could  
cause the control to malfunction.  
• Do not use on circuits exceeding specified voltage.  
Higher voltage will damage control and could cause  
shock or fire hazard.  
CONTENTS  
Description................................................................ 1  
Precautions .............................................................. 1  
Specifications ........................................................... 2  
Operation.................................................................. 2  
Installation ................................................................ 3  
PART NO. 37-7200A  
1039  
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INSTALLATION  
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.  
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.  
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.  
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 -40o F.  
Any orientation is acceptable.  
Four metal standoffs are used to support and mount the  
control into the unit.  
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.  
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  
C
RV  
UL approved, 105o C rated 16 gauge min., stranded 2/64”  
thick insulation wire is recommended for all line voltage  
connections.  
Type  
System Component Connection  
Reversing valve common  
Reversing valve output  
Compressor contactor coil  
Compressor call output  
Common, 24VAC return  
Defrost output  
Compressor call input  
Heating mode signal input  
24VAC input  
0.25” QC  
0.25” QC  
0.25” QC  
0.25” QC  
0.25” QC  
0.25” QC  
0.25” QC  
0.25” QC  
0.25” QC  
0.25” QC  
Following installation or replacement, follow appliance  
manufacturer’s recommended installation or service  
instructions to insure proper operation.  
CC  
Yout  
C (2)  
D
Y
B
R (2)  
Fan (2)  
OAT  
OCT  
Outdoor fan control  
2-pin connector Outdoor ambient temperature sensor  
3-pin connector Outdoor coil temperature sensor  
C
COMPRESSOR  
OUTDOOR  
FAN MOTOR  
HERM  
FAN  
R
C
S
R
S
C
RUN CAPACITOR  
CC  
COMPRESSOR  
CONTACTOR  
TO THERMOSTAT  
L1  
L2  
D
Y
C
R
B
FAN  
FAN  
Yout  
CC  
RV  
C
OAT  
OCT  
REVERSING  
VALVE  
RV  
Legend  
Low Voltage  
Line Voltage  
Demand Defrost Control  
Internal Control  
Tracing  
Fig 1.Typical System Wiring Diagram  
3
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White-Rodgers is a division  
of Emerson Electric Co.  
The Emerson logo is a  
trademark and service mark  
of Emerson Electric Co.  
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