Description
The Johnson Controls A28PJ-1 is a rugged, two-stage agricultural thermostat engineered for demanding farm and livestock facility environments. Featuring dual SPDT switching and wide multi-voltage compatibility, this thermostat delivers reliable, staged temperature control across a broad setpoint range — making it ideal for ventilation fans, heaters, and other agricultural HVAC equipment.
Key Features
- Two-stage control with two independent SPDT switches for sequential equipment staging
- Wide setpoint temperature range: 30°F to 110°F, suitable for year-round agricultural use
- Multi-voltage operation: 120 / 208 / 240 / 277 VAC for flexible installation across various electrical systems
- 2°F fixed differential per stage for precise, consistent switching
- Adjustable differential between stages: 2°F to 7°F, allowing customized staging intervals
- Coiled sensing element: 1-3/8″ x 2-1/4″ for accurate ambient temperature sensing
- Durable construction designed to withstand the harsh conditions of agricultural settings
Specifications
- SKU: A28PJ-1
- Brand: Johnson Controls
- Control Type: Two-Stage
- Switch Type: Two SPDT
- Voltage: 120 / 208 / 240 / 277 VAC
- Setpoint Temperature Range: 30°F – 110°F
- Differential Per Stage: 2°F
- Adjustable Differential Between Stages: 2°F – 7°F
- Sensing Element: 1-3/8″ x 2-1/4″ Coiled
- Application: Agricultural / Farm / Livestock Facilities
Applications
- Poultry and livestock barn ventilation control
- Staged fan and heater sequencing in agricultural buildings
- Greenhouse and grow facility temperature management
- General-purpose two-stage HVAC control in harsh environments
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