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JOHNSON CONTROLS Pneumatic Thermostats


Johnson Controls pneumatic thermostats are devices used to regulate temperature in industrial and HVAC applications. They operate on the principle of air pressure changes in response to temperature variations. These control pneumatic thermostats are used in commercial buildings, manufacturing f...acilities and refineries, maintaining precise temperature control and ensuring optimal comfort, process efficiency and safety.Read more

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JOHNSON CONTROLS T-3100-2A
JOHNSON CONTROLS T-3111-1B
StyleModelMax. Air PressureHeightApplicationMounting DirectionDepthAir ConsumptionReverse Acting / Direct ActingTemperature ScalePrice
A
T-3100-2		25 psi4"Heat Or CoolVertical5"1.5 SCIMDirect ActingCelsius, Fahrenheit€960.84
B
T-3111-1		25 psi5"Heat And CoolValve Top5"1.5 SCIMDirect ActingCelsius, Fahrenheit€1,002.70

Working Mechanism

  • These pneumatic thermostats operate on a pneumatic control system that relies on air pressure changes to regulate temperature.
  • A bimetallic element inside the thermostat senses temperature variations and causes an air supply valve to modulate accordingly.
  • As the temperature deviates from the setpoint, the bimetallic element flexes, altering the air pressure in the thermostat.
  • This pressure change then signals the connected pneumatic actuator, which adjusts the HVAC equipment, such as dampers or valves, to achieve the desired temperature.

Features

  • These Johnson Controls pneumatic thermostats have a Bi-metallic spring sensor for accurate temperature detection and control.
  • They offer horizontal and vertical mounting styles for flexible installation in HVAC system setups.
  • Selected models are designed for heating and cooling applications, offering versatile temperature control capabilities in HVAC systems.
  • The brand's T-4100-1 and T-4100-3 pneumatic thermostats include a cover, providing protection and aesthetics for the thermostat unit.

Frequently Asked Questions

What are the factors to consider while choosing these pneumatic thermostats?

  • Temperature range and setpoint accuracy
  • Compatibility
  • Environmental Conditions
  • Control Signal Type
  • Mounting and installation
  • System integration
  • Energy efficiency
  • Maintenance and serviceability
  • Regulatory compliance

How do I maintain these pneumatic thermostats?

  • Perform routine checks for wear and damage.
  • Verify and adjust temperature setpoints as needed.
  • Keep the thermostat and components free of dirt & debris.Look for and repair air leaks.
  • Service pneumatic actuators and control valves regularly.
  • Apply lubricant as recommended by the manufacturer.
  • Promptly replace worn or damaged components.
  • Ensure indicator lights and gauges function correctly.
  • Maintain balanced air pressure in the system.

What safety precautions should I take when using pneumatic thermostats?

  • Monitor and control air pressure to prevent damage and leaks.
  • Maintain clean, dry air sources to avoid contamination.
  • Swiftly repair pneumatic system leaks to maintain pressure.
  • Properly shut down systems during maintenance to prevent accidents.
  • Heed safety instructions and labels for electrical and other hazards.
  • Exercise caution around electrical components, ensuring proper grounding.
  • Ensure adequate airflow to prevent harmful gas buildup.
  • Establish and communicate emergency protocols.

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