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Johnson Controls A19ADB-29C Remote Bulb Temperature Control SPST Manual Reset 90-325°F

Manufacturer

Picture for manufacturer Johnson Controls

Part Number

A19ADB-29C
6 reviews
Sale Price

$183.10

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Product Details

The Johnson Controls A19ADB-29C is a single-stage, SPST remote bulb temperature control designed for reliable high-temperature sensing and switching in commercial and industrial HVAC, refrigeration, and air conditioning applications. Part of the proven Johnson Controls A19 Series (also marketed under the Penn Controls brand), this control uses a liquid-filled sensing element and capillary system to accurately monitor and respond to temperature changes without requiring any external power source.

The unit features an enclosed setpoint adjustment dial and a manual reset mechanism, making it well-suited for over-temperature limit control and safety shutoff applications. The Open-on-Rise contact configuration opens the circuit when the sensed temperature reaches the setpoint, providing a standard high-limit control action.

Key Specifications:

  • Temperature Range: 90°F to 325°F (32°C to 163°C)
  • Maximum Temperature Rating: 325°F
  • Contact Configuration: SPST, Open-on-Rise (Open High)
  • Reset Type: Manual Reset
  • Voltage Rating: 24 to 600 VAC (120/208/240 VAC utility rated)
  • Sensing Bulb Size: 1/4 in. x 5 in.
  • Capillary Length: 10 feet
  • Enclosure Type: NEMA 1
  • Setpoint Adjustment: Enclosed (concealed) dial
  • Differential: Fixed (non-adjustable)
  • Enclosure Material: Gray baked enamel, cold rolled steel

Features & Benefits:

  • Liquid-filled sensing element and capillary provides accurate, responsive temperature measurement
  • No external power required for operation
  • Manual reset ensures deliberate operator acknowledgment before restart after a limit trip
  • Sealed, dust-tight Penn Switch contact unit
  • Matched drawn bulb and well design for rapid, efficient heat transfer
  • Direct-reading scale provides fast, easy on-the-job setpoint adjustment
  • Compatible with heating, air conditioning, and refrigeration systems

The A19ADB-29C is also cross-referenced as the A19ADB-29 (without the C suffix). It is compatible with Johnson Controls WEL14A Series bulb wells for liquid immersion applications and is suitable for use in commercial HVAC, process temperature limiting, and industrial control panels.

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