A19ABC-41C Johnson Controls Temperature Control

Overview

The Johnson Controls A19ABC-41C is a heavy-duty, single-stage electromechanical line voltage thermostat designed for robust temperature control in commercial heating, cooling, refrigeration, and HVAC/R applications. It features a liquid-filled hydraulic capillary bulb sensing element that provides accurate and highly dependable repeat performance unaffected by barometric pressure changes or cross-ambient temperature conditions. Enclosed in a compact NEMA 1 rugged housing, this mechanical thermostat allows straightforward screwdriver or dial-based adjustments without the need for complex programming or external electrical power.

Features

• Liquid-filled copper sensing element and capillary for field-proven dependability
• Single-pole, double-throw (SPDT) snap-acting contacts enclosed in a dust-protected housing
• Concealed adjustable differential to discourage unauthorized configuration changes
• Precision “repeat” accuracy unaffected by cross-ambient temperatures or atmospheric pressure
• Compact general-purpose enclosure designed for space-saving mechanical installations
• Robust line voltage operational design directly controlling high-voltage equipment

Specifications

• Temperature Range: -35 to +40 degrees Celsius (-30 to +100 degrees Fahrenheit)
• Temperature Differential: 1.7 to 6.7 degrees Celsius (6 to 24 degrees Fahrenheit), adjustable
• Switch Action: SPDT (Single-Pole, Double-Throw)
• Capillary Length: 2.4 meters (approximately 8 feet)
• Enclosure Rating: NEMA 1 (general purpose, indoor)
• Maximum Ambient Temperature: 60 degrees Celsius (140 degrees Fahrenheit)

Applications

• Monitoring and temperature regulation in commercial HVAC and ventilation systems
• Temperature control for commercial refrigeration units, display cases, and walk-in coolers
• Direct line voltage control for food service equipment, beverage chillers, and milk coolers
• Hot water immersion applications using specialized bulb wells in closed tanks
• Cold storage and environmental rooms requiring single-stage temperature adjustments