A19AAB-4C Johnson Controls Temperature Control

Overview

The Johnson Controls A19BBC-2C is a single-stage coiled bulb space thermostat designed for return air or space temperature sensing in HVAC, commercial refrigeration, agricultural, and industrial applications. It features a liquid-filled sensing element with a coiled air bulb and a visible range scale for straightforward temperature tracking.

Features

• Single-stage temperature control with an open/close on rise switch action
• SPDT switching configuration to support heating or cooling applications
• Coiled air bulb sensor providing reliable ambient space temperature sensing
• Convertible range adjuster and an adjustable differential
• Rugged NEMA 1 galvanized steel enclosure protects internal components
• Snap-acting contacts in a dust-protected enclosure ensure long-term dependability

Specifications

• Temperature Range: -30 to 100 degrees Fahrenheit (-34 to 38 degrees Celsius)
• Adjustable Differential: 3 to 12 degrees Fahrenheit (1.7 to 7 degrees Celsius)
• Switch Type: SPDT
• Enclosure Type: NEMA 1 gray galvanized steel
• Sensor Element: 1-3/8 inch x 2-1/4 inch coiled air bulb
• Electrical Ratings: 120/208/240/277 VAC; 16 Amps at 120 VAC full load, 22 Amps resistive load
• Motor Rating: 1 HP
• Maximum Bulb Temperature: 140 degrees Fahrenheit (60 degrees Celsius)

Applications

• Return air or space temperature sensing in commercial building environments
• Commercial refrigeration and HVAC systems
• Temperature regulation for fan coils, unit heaters, and agricultural equipment
• Control of low-energy electrical loads such as small relays, solenoid valves, and electronic control circuits