The Johnson Control'S A421 Digital Temperature Controller Is Great For The Brewers Kegerator Or Keezer. You Can Use This To Keep Your Beer Or Wine At Exactly The Temperature You Like It. Excellent For Fermenting Lagers As Well. The A421 Series Controls Are Single Stage Electronic Temperature Controls With A Single-Pole Double-Throw (Spdt) Output Relay. The Controls Feature An Adjustable Backlit Lcd For Viewing The Temperature And Status Of Other Functions And A Three-Button Touchpad For Setup And Adjustment. An Led Indicates The On/Off Status Of The Output Relay. The A421 Control Is 120 Vac. The A421 Controls Provide Heating Or Cooling Control Sensor Offset Temperature Setback Adjustable Anti-Short Cycle Delay And A Restricted User Adjustment Mode. The Temperature Units Can Be Displayed In F Or C. The Temperature Adjustment Range Is -40 To 212F Or -40 To 100C. The A421 Automatically Changes From Heating And Cooling.
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