Schneider Electric (Barber Colman) AT-11-500 Thermostat Cover

The Schneider Electric AT-11-500 Thermostat Cover is a professional-grade HVAC enclosure engineered for the rugged demands of commercial and industrial environments. This dual-window thermostat cover provides critical protection for sensitive controls against unauthorized tampering, dust accumulation, and physical impact. It is the direct OEM replacement for legacy Barber Colman AT-11-399, AT-21-403, and AT-24-399 models. Designed primarily for the Schneider Electric TK series (including TK-10/11/12 and TK-50/51) and TC-1101 or TK-1101 pneumatic thermostats, this kit includes both a blank insert and a single window insert. This thermostat replacement cover kit allows technicians to customize visibility based on the specific needs of the facility, whether full control access or a clean, obscured finish is required. Constructed from high-impact plastic, the AT-11-500 ensures long-term thermostat protection and maintains the aesthetic integrity of the HVAC control system installation.

• Precise Compatibility: Engineered as a drop-in replacement for Barber Colman AT-11-399 and AT-24-399, facilitating rapid field service without modifications.
• Versatile Configuration: Includes a window insert for setpoint visibility and a blank insert for a tamper-resistant, low-profile application.
• Extended Equipment Life: Shields internal pneumatic and electronic components from particulate infiltration and mechanical damage in high-traffic areas.
• Tool-Free Access: Designed for straightforward mounting over existing TK-series thermostats to streamline commercial HVAC maintenance.

Is the AT-11-500 compatible with older Barber Colman thermostats?
Yes, this unit is the standardized HVAC replacement part for several legacy models, specifically the AT-11-399 and AT-21-403 series. It is purpose-built to fit the footprint of pneumatic TK-series controllers.

Does this cover include hardware for both windowed and blank setups?
Correct. The kit features a two-window design and comes complete with one blank insert and one window insert, providing flexibility for various thermostat mounting requirements.

What material is used for the Schneider Electric AT-11-500?
The cover is fabricated from high-grade, durable plastic designed to withstand the environmental stressors common in industrial HVAC equipment rooms and commercial hallways.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.