Johnson Controls A421AED-02 Electronic Temperature Control [Refurbished]

The Johnson Controls A421AED-02 is a single-stage electronic temperature control from the A421 series, with a single-pole double-throw (SPDT) output relay. It is a Type 4X model in the A421 range, in a watertight, corrosion-resistant enclosure for surface mounting.

Setup is done from a three-button touchpad against a backlit LCD, with basic and advanced programming menus. Useful features for refrigeration and process duty are built in: an anti-short cycle delay to protect compressors, switch-activated temperature setback, an adjustable sensor offset to trim the reading against a reference thermometer, and a restricted adjustment mode that locks the setpoint against casual changes once commissioned.

* Brand / Manufacturer: Johnson Controls (PENN)
* Model Number: A421AED-02
* Series: A421 Series Standard Electronic Temperature Control
* Type: Single-stage electronic temperature control
* Output: SPDT relay
* Setpoint Range: -40 to 212°F (-40 to 100°C)
* Display: Adjustable backlit LCD with three-button touchpad
* Enclosure: Type 4X (NEMA), IP66 watertight and corrosion resistant, surface mount
* Features: Anti-short cycle delay, switch-activated setback, adjustable sensor offset, restricted adjustment mode

Typical applications include refrigeration and coldroom control, food service and beverage equipment, process heating and cooling, and general commercial temperature control.. Johnson Controls. Johnson Controls. A421AED-02.