JOHNSON CONTROLS A28AA-4C Indoor Two-Stage Control
The JOHNSON CONTROLS A28AA-4C is a line-voltage mechanical thermostat for heat-or-cool control, housed in a steel enclosure. It features a 30° to 110°F range with a 3.5°F differential, operates on 24 to 277V AC, and…
SKU 3G-OTH-203284
Also listed as: A28AA4C · A28AA 4C
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
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Product Description
The JOHNSON CONTROLS A28AA-4C is a line-voltage mechanical thermostat for heat-or-cool control, housed in a steel enclosure. It features a 30° to 110°F range with a 3.5°F differential, operates on 24 to 277V AC, and uses a hydraulic air coil with (2) SPDT, open/close on rise switches.
Frequently Asked Questions
What is the JOHNSON CONTROLS A28AA-4C thermostat used for?
The JOHNSON CONTROLS A28AA-4C is a line-voltage mechanical thermostat used for heat-or-cool control in commercial or industrial HVAC systems. It is suitable for indoor two-stage control applications where a steel enclosure and hydraulic air coil sensing are required.
What are the specifications of the JOHNSON CONTROLS A28AA-4C?
The A28AA-4C operates on 24 to 277V AC, has a temperature range of 30° to 110°F with a 3.5°F differential, and features (2) SPDT open/close on rise switches. It uses a hydraulic air coil sensor and is housed in a steel enclosure for heat-or-cool control.
Where to buy the JOHNSON CONTROLS A28AA-4C worldwide?
You can source the JOHNSON CONTROLS A28AA-4C through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.
How to install the JOHNSON CONTROLS A28AA-4C thermostat?
Install the A28AA-4C by mounting the steel enclosure on a wall or panel, connecting line-voltage power (24 to 277V AC) to the (2) SPDT switches, and positioning the hydraulic air coil in the controlled airstream. Follow standard HVAC wiring practices and verify the 30° to 110°F setpoint range.
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3G Electric supplies JOHNSON CONTROLS indoor two-stage controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.