A19ACA-14C Johnson Controls Temperature Control

Overview

The Johnson Controls A19ACA-14C is a single-stage, line voltage mechanical remote bulb temperature control designed to open on a temperature decrease (Open Low). It incorporates an environmentally friendly liquid-filled copper sensing element and features a manual reset mechanism for safety and system protection. Housed in a compact NEMA 1 enclosure, this reliable controller is engineered for precise temperature management across various commercial and industrial HVAC/R setups.

Features

• Manual Reset: Provides an extra layer of system safety by requiring manual intervention when the control point is reached.
• Open Low Switch Action: Utilizes a Single-Pole Single-Throw (SPST) switch that opens the circuit on a drop in temperature.
• Liquid-Filled Sensing Element: Features a copper bulb and a 6-foot capillary tube that remains unaffected by cross-ambient conditions.
• Constant Differential: Ensures consistent operational control performance throughout the entire temperature range.
• Compact NEMA 1 Enclosure: A rugged, space-saving housing with a screwdriver slot for secure range adjustments.

Specifications

• Temperature Range: -30°F to 100°F (-34°C to 38°C)
• Maximum Bulb Temperature: 140°F (60°C)
• Switching Type: SPST (Single-Pole Single-Throw)
• Electrical Ratings: 24 to 277 VAC; 16.0 FLA @ 120 VAC, 9.2 FLA @ 208 VAC, 8.0 FLA @ 240 VAC
• Pilot Duty Rating: 125 VA
• Capillary Length: 6 feet (72 inches)
• Bulb Size: 3/8 inch diameter x 4 inches length
• Enclosure Rating: NEMA 1

Applications

• Designed for precise temperature control in heating, ventilating, and air conditioning (HVAC) systems.
• Ideally suited for commercial and industrial refrigeration applications where freeze protection or low-temperature limits require a manual reset.
• Frequently applied in environmental chambers, cooling controls, and commercial ventilation monitoring systems.