Johnson Controls A70KA-1 Control

The Johnson Controls A70KA-1 Control is a heavy-duty, high-limit temperature controller designed for critical HVACR safety applications. This remote bulb temperature control operates within a setpoint range of 100°F to 170°F, specifically engineered to open the main circuit upon a temperature rise. Featuring a 4-wire, 2-circuit contact block, the A70KA-1 (identical to the A70KA-1C) provides two isolated sets of contacts: as the main LINE-M2 contacts open on high temperature, the auxiliary LINE-M1 contacts simultaneously close to energize an alarm or BAS notification. This manual reset temperature switch incorporates a 6-foot capillary and a 10-inch sensing bulb, utilizing a vapor-charged element for precise response. The "trip-free" manual reset design ensures the system cannot be overridden until the temperature has normalized, making it an essential high limit cutout for ventilation systems and industrial process equipment.

• Dual-Circuit Versatility: The 4-wire configuration allows for simultaneous equipment shutdown and alarm activation.
• Reliable Safety Lockout: Manual reset functionality prevents automatic restarts in hazardous high-temperature conditions.
• Precision Sensing: The 6' capillary and 10" remote bulb provide flexible mounting while maintaining accurate thermostatic control.
• Industrial Durability: Equipped with long-life, snap-acting contacts and a NEMA 1 enclosure for rugged field performance.

• How does the manual reset function on the A70KA-1? The control locks out when the sensed temperature exceeds the setpoint; the reset button must be manually pressed and released only after the temperature returns to a safe range.
• Is the A70KA-1 compatible with A70KA-1C? Yes, the A70KA-1 is technically identical to the A70KA-1C and serves as its direct replacement in all high-limit applications.
• What is the maximum bulb temperature for this unit? The vapor-charged sensing element is rated for a maximum overrun temperature of 240°F.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.