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Johnson Controls T-4756-201 Dual Dial Heat/Cool Thermostat Horizontal Mount Direct/Reverse Acting 15/20 PSI

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Special Price $390.03 Regular Price $432.93
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SKU
T-4756-201
The Johnson Controls T-4756-201 Thermostat is a dual heat/cool thermostat for direct-acting and reverse-acting applications at 20 PSI and 15 PSI respectively. It has its heating element in a horizontal position and has a manual switch-over mechanism for accurate temperature regulation. This thermostat works between 13°C and 29°C and is suitable for several HVAC uses. It comes with 1/4” NPT connection type and the device is powered by 24V. its white outlook can easily fit any environment. This thermostat is designed to be used in both, residential, commercial and industrial heating, ventilation and air conditioning systems. It offers precise control of temperature which improves comfort and energy consumption.
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HVAC Controls & Electrical, Control & Sensing Devices
Manufacturer:
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Specifications

  • Range of Temperature: 55°F to 85°F
  • Size: 1/4"
  • Connection Type: NPT
  • Voltage: 24V
  • Changeover: Manual
  • Material: Alumninum
  • Colour: White
  • Weight: 0.44 Lbs

Product Overview:
Provides pneumatic temperature control for heating and cooling applications, the Johnson Controls T-4756-201 Pneumatic Heat/Cool Thermostat regulates temperature through a pneumatic control arrangement. This is an OEM thermostat designed for applications requiring both heating and cooling control. Its direct/reverse-acting operation accommodates the specified control actions, while the horizontal mounting style is intended for installations designed for this thermostat orientation.

Cooling Control

Controls heating and cooling applications through pneumatic operation. The direct/reverse-acting design provides two different control actions, allowing the thermostat to serve applications that require the corresponding pneumatic response. The 15/20 PSI ratings are important when matching the thermostat to the pressure requirements of the existing control system.

Horizontal Mounting Arrangement:
Uses a horizontal mounting design for pneumatic HVAC installations that require this thermostat orientation. This mounting style defines how the thermostat is positioned within the equipment and distinguishes it from thermostats designed for other mounting orientations.

Replacement Guidelines:
Replace the Johnson Controls T-4756-201 Pneumatic Heat/Cool Thermostat if physical damage, deterioration, or pneumatic control malfunction prevents it from maintaining the intended heating and cooling response. Damage affecting its sensing or pressure-control capability may also indicate the need for replacement.

Common Failure Symptoms:

  • Heating or cooling response becomes inconsistent.
  • Temperature regulation fluctuates unexpectedly.
  • Pneumatic output becomes irregular.
  • Connected equipment does not respond correctly to thermostat adjustments.
  • The thermostat exhibits visible physical damage.

Equipment Compatibility:
Designed for pneumatic HVAC applications requiring a horizontally mounted heat/cool thermostat, the Johnson Controls T-4756-201 supports direct/reverse-acting control. This OEM thermostat is intended for equipment requiring the specified 15/20 PSI pressure arrangement. Confirm the mounting orientation, operating action, and pressure requirements against the equipment documentation before selecting it.

Technical Specifications:
Brand: Johnson Controls
Part Number: T-4756-201
Product Type: Pneumatic Heat/Cool Thermostat
Pressure Specification: 15/20 PSI

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Product Questions (5)
Customer Questions
How does the Johnson Controls T-4756-201 Pneumatic Heat/Cool Thermostat regulate temperature?

Its sensing element detects surrounding temperature changes and translates them into pneumatic control responses for heating or cooling equipment.

What conditions may require replacement of this pneumatic thermostat?

Replacement may be necessary when physical deterioration or pneumatic malfunction prevents the thermostat from maintaining the intended temperature-control response.

Which operating irregularities can indicate a thermostat fault?

Unstable temperature regulation, inconsistent heating or cooling, irregular pneumatic output, and poor equipment response to adjustments may signal a fault.

What specifications should be checked when confirming compatibility?

Verify the horizontal mounting orientation, direct/reverse-acting configuration, and 15/20 PSI pressure requirement against the equipment’s manufacturer documentation.

Can the thermostat’s pneumatic control performance be assessed during inspection?

Yes, examine its physical condition and check whether the pneumatic output responds consistently to temperature-control changes.