Description
The Johnson Controls T-4752-205 is a pneumatic heating-cooling thermostat engineered for commercial HVAC applications where reliable, air-pressure-based temperature control is required. Designed for horizontal mounting, this thermostat delivers dual-mode pneumatic operation to support both heating and cooling systems in a single, compact device.
Key Features
- Pneumatic heating-cooling thermostat for commercial and light industrial HVAC systems
- 15 PSIG reverse-acting output for heating control applications
- 20 PSIG direct-acting output for cooling control applications
- Horizontal mounting orientation for flexible installation
- Dual-mode pneumatic operation supports both heating and cooling from a single thermostat
- Designed for use with standard pneumatic control systems
- Cover and mounting bracket ordered separately — allows customization for specific installation requirements
Pneumatic Operation
This thermostat operates on a pneumatic signal, making it ideal for legacy and modern pneumatic HVAC control systems found in commercial buildings, schools, hospitals, and industrial facilities. The reverse-acting mode (15 PSIG) is suited for heating valve and damper control, while the direct-acting mode (20 PSIG) manages cooling equipment — providing precise, pressure-based modulation without electrical wiring at the sensing point.
Installation Notes
- Horizontal mounting configuration
- Cover must be ordered separately
- Mounting bracket must be ordered separately
- Intended for integration into existing or new pneumatic control systems
Application
The T-4752-205 is well-suited for VAV systems, fan coil units, and air handling units in commercial buildings where pneumatic controls are the standard. Its dual-acting capability reduces the need for multiple thermostats in changeover systems, simplifying installation and maintenance.
Specifications
- Brand: Johnson Controls
- Model / SKU: T-4752-205
- Control Type: Pneumatic
- Application: Heating and Cooling
- Reverse Acting Pressure: 15 PSIG
- Direct Acting Pressure: 20 PSIG
- Mounting: Horizontal
- Cover: Ordered separately
- Mounting Bracket: Ordered separately
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