White Rodgers 47D40-801 installation instructions Operator Save these instructions for future use

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.

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	47-21517-82	DDL-013102-1RH
47-21517-17	47-21517-88	DDL-017002-2RH
47-21517-18	47-102685-01	DDL-017102-1RH
47-21517-23	47-102685-03	DDL-017702-1RH
47-21517-24	47-102684-01	DDL-117702-3RH
47-21517-11	47-102684-03	DDL-013002-0RH
47-21517-14	47-102684-83	DDL-013002-1RH
47-21517-13

DESCRIPTION

47D40-801

PRECAUTIONS

!CAUTION

•This control is intended only for Rheem heat pump systems.

•Replace 47D40-801 control as a unit - no user service- able parts.

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.

	CONTENTS
Description	1
Precautions	1
Specifications	2
Operation	2
Installation	3

!WARNING

•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 specified voltage. Higher voltage will damage control and could cause shock or fire hazard.

	PART NO. 37-7200A
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