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Klixon® 29PS Series HVAC Pressure Switch for Commercial and Industrial Uses

-20°F to 150°F, Manual Reset HVAC Pressure Switch

Features and Overview

  • Trip-free manual reset
  • Maintenance-free design
  • Single-pole, single-throw, normally closed contacts
  • Factory calibrated pressure set points
  • Hermetically sealed sensor

The 29PS HVAC pressure switch utilizes a snap-acting stainless steel Klixon disc that reverses its curvature when pressurized above a customer specified actuation pressure.  When the disc snaps it opens a set of electrical contacts by means of a transfer pin.  Resetting of the switch must be accomplished manually by pressing the integrated reset button.

The unique latching mechanism in the 29PS HVAC pressure switch design assures safe electrical cutout even if the reset button is held fully depressed.  This trip-free design prevents the consumer from restarting the equipment until the line pressure has dropped below the release setpoint.

The welded, hermetic sensor of the 29PS HVAC pressure switch provides increased reliability and maintenance-free operation for the lifetime of the switch.  The actuation and release pressures of the disc are factory calibrated, simplifying installation and helping make the 29PS HVAC pressure switch tamper resistant.  The epoxy potting and rubber boot provide an enviornmental seal for the switch mechanism, protecting it from dust, oil and moisture.

the 29PS HVAC pressure switch is a derivative of the Klixon 20PS HVAC pressure switch, long recognized as an idustry standard control device.

Product Uses

  • Upper limit control on unitary and central air conditioning systems, heat pumps, roof top units, and refrigeration systems.

Performance Characteristics

  • Ambient Temperature: -20°F to 150°F (-29°C to 66°C)
  • Fluid Temperature: -65°F to 275°F (-54°C to 135°C)
  • Operating Pressure: 200 to 750 psig
  • Burst Pressure: 5,000 psig (345 bar)
  • Life at Rated Current: 10,000 cycles
  • Electrical Ratings:
    • 5.8 RLA, 34.8 LRA @ 120 Vac
    • 2.9 RLA, 15.0 LRA @ 240 Vac
    • 375 VA @ 120 Vac pilot duty

For more information on HVAC pressure switch solutions, please send an email to EngHelpDesk@dee-inc.com.  We Help Manufacturers Find Solutions and Exceed Their Goals.  DEE is a Trusted Supplier and Expert in providing Cost Savings, Fast Multiple Solution Options, Supplier Reduction, and Time Savings.


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