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Trane SWT04656 Low Pressure BZ Switch

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1  Review Add Your Review
Special Price $54.19 Regular Price $62.32
In stock
SKU
SWT04656
The Trane SWT04656 Low Pressure Switch BZ is a protective control component designed to sense refrigerant pressure levels and interrupt operation when pressure drops below the defined threshold. It works by means of an internal pressure-sensitive diaphragm which activates an electrical contact connected to the control circuit. It is installed on the refrigerant line with the compressor and is directly connected to system safety logic. This switch is used in heat pump HVAC systems and in controlled operation, protection of compressors in maintaining stable operation under different load conditions.
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HVAC Controls & Electrical, Switches, Pressure Switches
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Product Questions (2)
Customer Questions
What maintenance is required for the Trane SWT04656 Pressure Switch?

Regularly inspect the switch for dirt, corrosion, or loose wiring. Ensure proper calibration and test functionality periodically. Cleaning contacts and verifying pressure settings help maintain accurate operation. Always follow safety precautions to avoid electrical hazards.

What are common issues with the Trane SWT04656 Pressure Switch?

  • False triggering or failure to activate.
  • Corroded or dirty contacts.
  • Wiring connection problems.
  • Pressure sensing inaccuracies.

Installation Steps

Step 1: Turn off all power to the system before beginning installation.

Step 2: Mount the switch securely on the designated low-pressure port.

Step 3: Connect the wiring according to the system’s diagram, ensuring correct terminal placement.

Step 4: Check that the switch is oriented properly for accurate pressure sensing.

Step 5: Secure wires to prevent strain or accidental disconnection.

Step 6: Restore power and test the switch by applying system pressure to confirm operation.