A19AAC-9C Johnson Controls Temperature Control

Overview

The Johnson Controls A19AAC-9C is a single-stage remote bulb temperature control designed for dependable regulation in commercial and industrial HVAC/R applications. It utilizes an environmentally friendly, liquid-filled copper sensing element and a 6-foot capillary tube to precisely control heating or cooling systems. Housed in a compact NEMA 1 enclosure, this rugged device provides line voltage switching and features a screwdriver slot for easy setpoint adjustment.

Features

• Single-stage control with a single-pole, double-throw (SPDT) snap-acting switch.
• Liquid-filled copper sensing element provides dependable repeat accuracy.
• Performance remains unaffected by barometric pressure changes and cross-ambient conditions.
• Compact NEMA 1 enclosure protects contacts from dust and environmental contaminants.
• Constant differential is maintained throughout the entire operating range.

Specifications

• Temperature Range: 100 to 240 F (38 to 116 C)
• Fixed Temperature Differential: 6 F (3.3 C)
• Capillary Length: 6 feet (72 inches)
• Sensing Bulb Size: 3/8 inch diameter by 3-1/2 inches length
• Maximum Bulb Temperature: 290 F (143 C)
• Electrical Contact Action: SPDT, open or close on temperature rise
• Voltage and Ratings: 120/208/240 VAC; 16.0 FL Amps @ 120 V, 8.0 FL Amps @ 240 V; 22 A Non-Inductive; 125 VA Pilot Duty

Applications

• High-range temperature monitoring for industrial and commercial HVAC/R equipment.
• Dual fuel changeover remote bulb temperature regulation strategies.
• General purpose space, liquid, or air temperature control in heating and cooling circuits.
• Open low or open high safety cutout applications in commercial ventilation systems.