A19ADB-31C Johnson Controls Temperature Control

Overview

The Johnson Controls A19ADB-31C is a single-stage, remote bulb temperature control designed for heating, cooling, and general-purpose applications. It features a high-temperature lockout mechanism with a manual reset function, ensuring the system shuts down safely when temperatures exceed the set point and requires human intervention to resume operation. Encased in a durable NEMA 1 enclosure, it utilizes a liquid-filled sensing element for rapid and accurate responses to temperature variations.

Features

• Manual Reset: High-temperature lockout requires the reset button to be pressed and released before operation can resume.
• Liquid-Filled Sensing Element: Provides rapid response to temperature changes and remains unaffected by cross-ambient conditions or barometric pressure.
• Reliable Switching: Features snap-acting contacts housed within a dust-protected enclosure.
• Trip-Free Mechanism: Contacts cannot be blocked in the closed position, ensuring safety.
• Simple Installation: Surface-mount configuration with an exposed or visible scale plate for easy tracking.

Specifications

• Temperature Range: 90°F to 325°F (32°C to 163°C)
• Switch Type: SPST (Single-Pole, Single-Throw)
• Switch Action: Opens on temperature rise (Open High)
• Capillary Length: 10 feet (120 inches)
• Bulb Dimensions: 0.29 inches diameter x 2.5 inches length
• Enclosure Rating: NEMA 1
• Electrical Ratings: 120/208/240 VAC; Pilot Duty rated at 125 VA (24 to 277 VAC)

Applications

• High-temperature limit and lockout control for commercial hot water boilers and heating systems.
• General-purpose temperature regulation in HVAC equipment where manual reset safety limits are necessary.
• Industrial process and temperature monitoring where single-stage heating or cooling control is required.