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Johnson Controls A28PJ-1 2-SPST Temperature Switch 30°-110°F NEMA 4X Penn Series

Special Price $405.12 Regular Price $449.68
In stock
SKU
A28PJ-1
The Johnson Controls A28PJ-1 Penn Series NEMA is a universal temperature control equipment meant for HVAC systems. It works within a temperature range of 32 degree F to 110 degree F and thus controls the climate effectively. Supplied with the voltage rating of 120 V and the connection type of SPDT, it effectively regulates heating or cooling equipment. This control signal works in a two position manner which enables fine control of the temperature. Mainly applied in HVAC systems, the A28PJ-1 is designed for safe operation with fail-safe spring return, which means that it will close in case of power loss. These include accurate temperature regulation, and improving comfort and efficiency in homes, offices and factories.
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Specifications

  • Range of Temperature: 32°F to 110°F
  • Voltage: 120V
  • Connection Type: SPDT
  • Control Signal: Two Position
  • Fail-Safe Mode: Spring Return
  • Fail Safe Position: Spring Closed
  • Weight: 2 Lbs
Manufacturer Name: Johnson Controls
Product Number: A28PJ-1
OEM Part Number: A28PJ-1
Product Description: Nema 4X 30-110 F. 2-Sp/Dt Swtc
Weight:1.35lbs/612.35g

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Customer Questions
What maintenance is required for the Johnson Controls A28PJ-1 2-SPST Temperature Switch?

Periodically inspect the sensing bulb and capillary for physical damage, kinks, or contamination that may affect temperature accuracy. Ensure the enclosure remains sealed and free from moisture or corrosion.

What are common issues with the Johnson Controls A28PJ-1 2-SPST Temperature Switch?

  • Inaccurate temperature readings due to sensing bulb misplacement.
  • Switch contacts sticking or failing to actuate properly.
  • Calibration drift causing incorrect cut-in or cut-out points.
  • Wiring or terminal looseness leading to intermittent operation.

Installation Steps

Step 1: Turn off power and lock out electrical supply before installation.

Step 2: Mount switch on rated surface or panel in desired location.

Step 3: Connect wiring to terminals per diagram, ensuring secure insulation.

Step 4: Restore power and test operation.