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47D Series

Model Number

Hi/Lo

Pressure

Switch Inputs Outdoor Fan Relay

Mounting

Dimensions

47D40-801

No

PSC 1-speed

Metal Standoffs

3.375

x 3.625

47D43-811

Yes

PSC or ECM, 1-speed Plastic Standoffs

3.5

x 5.5

47D SERIES DEMAND

DEFROST CONTROLS

www.white-rodgers.com

83

COOLING /

REFRIGERATION

47d SERIES DEMAND DEFROST CONTROL

Microprocessor-Based Controls Designed to Detect Ice Build-Up on

the Outdoor Coil in a Heat Pump System and Defrost the Coil by

Reversing the Direction of Refrigerant Flow. Replaces Rheem Models

FEATURES

• Demand defrost algorithm “self-calibrates” to the heat pump system.

• Compressor contactor relay control for short-cycle protection, and noise reduction

while reversing valve shifts.

• Dipswitch-selectable defrost termination temperature (50/60/70/80ºF).

• Kits Include replaceable ambient and coil temperature sensors.

• LED diagnostic display.

SPECIFICATIONS

Electrical Ratings [@ 77ºF (25ºC)]:

Rated Voltage . . . . . . . . . . . 24 VAC

Rated Voltage Range . . . . . . . . 18-30 VAC

Max. Power Consumption @ 24 VAC . . . 4.08 VA

Nominal Frequency . . . . . . . . . 50/60 Hz

Relay Load Ratings:

Compressor Contactor Relay

(CC, only used in 47D40-801) . . . . 20 VA in rush, 6 VA holding

Reversing Valve Relay (RV) . . . . . 24 VA

Auxiliary Heat Relay (D) . . . . . . . 1 Amp. 0.6 P.F.

Operating Temperature Range . . . . -40

o

to 150

o

F (-40o to 65

o

C)

Humidity Range . . . . . . . . . . 5% to 95% relative humidity

(non-condensing)

Timing Specifications @ 60Hz* . . . .

Nom. Units

Defrost Lockout Time . . . . . . . . . . . . . . . . 34 Mins

Maximum Defrost Time . . . . . . . 15 Mins.

Maximum Frosting Time . . . . . . . 6

Hrs.

Short Cycle Lockout Time . . . . . . 5

Mins.

Noise Abatement Time . . . . . . . 5

Sec.

NOTE:

50Hz Timings are 20% longer