A421 Series Electronic Temperature Controls

For use with single-stage refrigeration or HVAC equipment

A421 controls feature a backlit LCD with adjustable brightness and a three-button touchpad interface that can be set to restrict adjustments.

Standard models have simple On/Off settings for heating or cooling, an adjustable anti-short cycle delay, temperature setback, sensor offset capability and sensor failure mode
Models are available with NEMA 1 or NEMA 4X (water and dust proof) enclosures
Off-cycle defrost integral cycle time and corded models are also available
A421ABD and A421AED series includes an off cycle defrost function
A421ABT and A421AET series include a cycle timer function
A421ABG, A421ABJ and A421AEJ series are available with various power cord and plug combinations