Description
The Johnson Controls A28GJ-33 is a robust two-stage temperature control designed for demanding commercial and industrial HVAC applications. Featuring dual SPDT switching action, this controller delivers precise, sequenced temperature management across two independent stages — ideal for multi-stage heating, cooling, or process control systems.
Key Features
- Two-stage control with two SPDT (Single-Pole, Double-Throw) switches for reliable, independent stage sequencing
- Wide voltage compatibility: 120 / 208 / 240 / 277 VAC — suitable for a variety of commercial power configurations
- Setpoint range of 60°F to 90°F for precise low-to-mid range temperature control
- 3/8″ x 3-1/2″ sensing bulb for accurate immersion or surface temperature sensing
- 5-foot capillary length provides flexible remote sensing installation
- Knob-style range adjuster for easy, tool-free setpoint adjustment in the field
- No enclosure design allows integration into existing panels or custom enclosures
Application
The A28GJ-33 is well-suited for commercial HVAC systems requiring two-stage temperature switching, including fan coil units, air handling units, refrigeration systems, and hydronic heating or cooling applications. Its broad voltage range makes it compatible with a wide array of commercial electrical systems without the need for additional transformers or adapters.
Specifications
- Brand: Johnson Controls
- SKU / Part Number: A28GJ-33
- Control Type: Two-Stage Temperature Control
- Switch Type: Two SPDT Switches
- Voltage Rating: 120 / 208 / 240 / 277 VAC
- Setpoint Range: 60°F to 90°F
- Sensing Bulb Size: 3/8″ diameter x 3-1/2″ length
- Capillary Length: 5 feet
- Setpoint Adjustment: Knob Range Adjuster
- Enclosure: None (open construction for panel mounting)
Why Choose the Johnson Controls A28GJ-33?
Johnson Controls is a globally recognized leader in building automation and HVAC controls. The A28GJ-33 reflects their commitment to reliability and precision, offering contractors and facility managers a dependable two-stage solution that installs quickly and performs consistently. The open-frame design allows seamless integration into custom control panels, while the multi-voltage rating simplifies specification across diverse commercial projects.
Reviews
There are no reviews yet.