A19ABA-45C Johnson Controls Temperature Control

Overview

The Johnson Controls A19ABA-45C is a single-stage mechanical remote bulb temperature control designed to provide reliable regulation in heating, ventilation, air conditioning, and refrigeration (HVAC/R) applications. It utilizes an environmentally friendly, liquid-filled copper sensing element and capillary to detect temperature changes. Housed in a compact NEMA 1 enclosure, this model features an adjustable differential and is designed to open on temperature drop (Open Low), making it ideal for cooling and refrigeration general-purpose requirements.

Features

• Wide temperature ranges and constant differential throughout the entire range
• Environmentally friendly liquid-filled sensing element and capillary
• Compact NEMA 1 enclosure providing standard protection
• Snap-acting contacts enclosed in a dust-protected housing for field-proven dependability
• Unaffected by cross-ambient temperature changes or barometric pressure variations
• Concealed differential adjustment to prevent unauthorized setting modifications

Specifications

• Temperature Control Range: -30 to 100 °F (-34 to 38 °C)
• Differential Temperature: 3 to 12 °F (1.7 to 6.7 °C) adjustable
• Switch Action: SPST (Single Pole Single Throw) – Open Low (Opens on temperature fall)
• Control Stages: Single Stage
• Bulb Size: 3/8 inch x 4 inches
• Capillary Length: 6 feet
• Enclosure Rating: NEMA 1
• Electrical Rating / Voltage: 120 VAC / 240 VAC line voltage switching
• Maximum Bulb Temperature: 140 °F (60 °C)

Applications

• Frozen food cases and commercial display cases
• Beverage coolers and milk coolers
• Walk-in boxes and commercial refrigeration units
• Water chillers and general-purpose cooling systems
• Environmental air control in commercial and industrial HVAC/R configurations