Overview
The Johnson Controls A419AEC-2C is a compact, single-stage electronic temperature controller designed for HVAC and refrigeration systems. It features a Single-Pole, Double-Throw (SPDT) output relay, a lockable front-panel touchpad for setup and adjustment, and a Liquid Crystal Display (LCD) for viewing temperature and status. This NEMA 4X-rated unit operates at 120/240VAC and supports a temperature range of -30 to 212°F, making it suitable for diverse industrial and commercial cooling and heating applications.
Key Features
- Heating and cooling modes with adjustable setpoint and differential
- Lockable front-panel touchpad and LCD display for easy configuration and real-time monitoring
- LED indicator for relay On/Off status visibility
- Adjustable anti-short cycle delay and temperature offset function
- Remote sensing capability and interchangeable sensors
- Compact design — the most space-efficient electronic temperature control available
Technical Specifications
Setpoint range: -30 to 212°F (-34 to 100°C)
- Supply Voltage: 120/240VAC
- Output Type: SPDT relay
- Display: Liquid Crystal Display (LCD) with LED indicator
- Control Mode: Single-stage heating and cooling
- Sensor Type: Remote sensing with interchangeable options
- Enclosure Rating: NEMA 4X (watertight, corrosion-resistant)
- Lead Length: 6 ft. 7.5 in. (approximately 2 m)
- Applications: HVAC, refrigeration, pump and boiler systems
Typical Applications
The A419AEC-2C is ideal for refrigeration and HVAC equipment, including frozen and refrigerated food cases, beverage coolers, and pump and boiler applications. It is commonly used in:
- Commercial and industrial refrigeration systems
- HVAC heating and cooling control
- Pump and boiler protection circuits
- Temperature monitoring in food service and cold storage facilities
- Process control in manufacturing environments requiring precise temperature regulation
Compatibility & Replacements
Compatible With
- Standard 120/240VAC power supplies (line voltage systems)
- Remote temperature sensors (A99B series and compatible types)
- SPDT-compatible relay circuits and control systems
- HVAC and refrigeration equipment with standard thermostat interfaces
Replaces / Drop-In Replacement For
- Johnson Controls A419 series models with matching voltage and SPDT configuration
- Earlier single-stage electronic temperature controllers requiring NEMA 4X enclosures
- Manual thermostats in HVAC and refrigeration applications
Works With
- Remote temperature sensors (interchangeable sensor capability)
- Standard HVAC and refrigeration control circuits
- Heating and cooling plant equipment (boilers, chillers, compressors)
- Industrial process systems requiring precise setpoint and differential control
