47D43-811
Deluxe Defrost Control
INSTALLATION INSTRUCTIONS
The 47D43-811 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” principles
to calibrate itself to the heat pump system. The defrosting is
performed by reversing the direction of flow of refrigerant.
The 47D43-811 is meant to replace the following controllers
in Rheem heat pump systems:
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
Operator: Save these instructions for future use!
DESCRIPTION
PRECAUTIONS
• To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
• This control is not intended for use in locations where
it may come in direct contact with water. Suitable
protections must be provided to shield the control from
exposure to water (dripping, spraying, rain, etc.)
• Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper or loss of
heat pump operation and/or shock hazard.
• Following installation or replacement, follow appliance
manufacturer’s recommended installation/service
instructions to insure proper operation.
• Do not use on circuits exceeding specied voltage.
Higher voltage will damage control and could cause
shock or re hazard.
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.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes
and ordinances.
This control is a precision instrument, and should be handled
carefully. Rough handling or distorting components could
cause the control to malfunction.
• This control is intended only for Rheem heat pump
systems.
• Replace 47D43-811 control as a unit - no user
serviceable parts.
CONTENTS
Description ................................................................ 1
Precautions ............................................................... 1
Specifications ............................................................ 2
Operation ................................................................... 2
Installation ................................................................. 3
47D43-811 Replaces
47D43-111
47D43-111
47D43-111 02
47D43-101
47-102685-04
47-102685-84
47-102685-05
47-102685-02
47-21517-22
47-21517-92
47-102684-02
47-102684-04
47-102684-07
47-102684-08
DDL-122131-2RH
DDL-122131-2RH
47D43-811
white-rodgers.com
emersonclimate.com
PART NO. 37-7199B
Replaces 37-7199A
1536
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