A19ABC-44C Johnson Controls Temperature Control

Overview

The Johnson Controls A19ABC-44C is a heavy-duty, single-stage mechanical remote bulb temperature control designed to regulate temperatures in demanding HVAC, commercial refrigeration, and industrial environments. It incorporates a liquid-filled sensing element and capillary tube to deliver precise, rapid response to temperature fluctuations, operating reliably without cross-ambient interference. Housed in a compact NEMA 1 enclosure, this versatile thermostat supports line-voltage switching for both heating and cooling equipment.

Features

• Liquid-filled sensing element ensures highly accurate and rapid response to temperature changes.
• SPDT (Single-Pole, Double-Throw) switching action enables flexible wiring configurations for either heating or cooling applications.
• Broad temperature control range covers a wide selection of operational requirements.
• Adjustable differential allows fine-tuning of system responses to optimize energy efficiency and equipment cycles.
• Built-in dependability with precision snap-acting contacts housed in a dust-protected enclosure.
• Extended 20-foot capillary length provides significant reach for remote temperature monitoring.

Specifications

• Temperature Control Range: 50°F to 200°F (10°C to 93°C)
• Adjustable Differential: 6°F to 24°F (3.3°C to 13°C)
• Switch Type: SPDT (Single-Pole, Double-Throw)
• Voltage Compatibility: 120 / 208 / 240 VAC
• Capillary Length: 20 feet
• Bulb Dimensions: 3/8 inch x 3-1/2 inches
• Enclosure Rating: NEMA 1 (IP20 high-impact plastic/metal)
• Reset Type: Automatic recycling

Applications

• Commercial refrigeration equipment including walk-in coolers, freezers, beverage coolers, and display cases.
• HVAC systems such as unit heaters, duct heating systems, and water chillers.
• General-purpose industrial temperature-sensitive setups requiring accurate remote sensing.
• Hot water boiler control and immersion applications when combined with appropriate bulb wells or closed tank fittings.