White Rodgers 47D40-801 installation instructions Specifications, Operation, Led

SPECIFICATIONS

Electrical Ratings [@ 77o F (25o C)]:
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	20 VA in rush, 6 VA holding
Fan Relay	1/2 HP @ 240, 1/4 HP @ 120 VAC
Reversing Valve Relay (RV)	24 VA
Auxiliary Heat Relay (D)	1 Amp. 0.6 P.F.
Operating Temperature Range	-40oto 150o F (-40oto 65o C)
Humidity Range	5% to 95% relative humidity
	(non-condensing)

Timing Specifications @ 60Hz*

Nom Units

Defrost Lockout Time	34	Mins.
Maximum Defrost Time	14	Mins.
Transient Delay	2	Mins.
Maximum Frosting Time	6	Hrs.
Short Cycle Lockout Time	5	Mins.
Noise Abatement Time	5	Sec.

*50Hz Timings are 20% longer.

The control is recognized by UL as an incorporated electronics control per UL 60730-1A. This control does not perform any safety/protective functions. This device is automatic, type 1 action, incorporated control.

OPERATION

Each controller has 24 VAC input and B, Y, and D terminals for connection to a standard thermostat. The controller has pins for connection of two temperature sensors to measure ambient and coil temperature. Controlled outputs are outdoor fan, reversing valve, and compressor contactor.

The controller has a LED to indicate system operation status.

Option Switch

Switch labeled SW1 is used to select the defrost mode termination temperature of outdoor coil. Defrost mode is terminated when the coil temperature exceeds the selected termination temperature. Temperature options for SW1 switch settings are:

		B	A
		On	Off	50o F
B	A
		Off	On	60o F
B	A
		On	On	70o F (default)
B	A
		Off	Off	80o F
B	A

Test Pins

The connector labeled TEST can be used to change operation mode in the field. Momentarily short the test pins to force the system into the defrost mode. Momentarily short the test pins again to terminate the defrost mode. To avoid unnecessary system mode transition, do not use the test pins frequently.

Short Cycle Protection

The control includes protection against short cycling the compressor. At power-up, and each time the Y input is interrupted, the control will enter a 5-minute short cycle lockout period. During this lockout, the control will not energize the compressor contactor, even if a call for heating or cooling is received on the Y input. The control will resume normal operation when the lockout period expires.

Noise Abatement

When the reversing valve is switched during an active call for heating or cooling, such as when entering or leaving a defrost cycle, the control will de-energize the compressor contactor for 5 seconds in order to reduce compressor noise.

Diagnostic Features

The control continuously monitors system operation. If a fault occurs, the red LED on the control will flash a diagnostic code, if more than one fault occurs, only the code with the higher priority will flash. The flash time is to be 0.5 seconds on and 0.5 seconds off followed by 2 seconds off. The table shows the diagnostic codes:

LED		Fault Indication	Display Priority
ON		Normal	0
1	Flash	Defrost mode	1
2	Flashes	Coil sensor fault	3
3	Flashes	Ambient sensor fault	2

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