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Multi-Refrigerant Support: Approved for use with R-22
Most OEM assemblies include the integration hub with a set screw already tapped
Ensure the thermopile output stays consistent under load
this model is specifically valved and charged for R-404A performance
Carrier HK02ZB421 Pressure Switch 30067439-890 Multi-Refrigerant Support: Approved for useThe Carrier HK02ZB421 Pressure Switch is a critical safety component designed for R 410A refrigerant residential and commercial air conditioning systems. This heavy duty high pressure switch features a normally closed SPST (Single Pole Single Throw) configuration and is factory calibrated to open at 610 PSI to prevent compressor damage during over pressurization. Once system pressure stabilizes, the switch initiates a manual reset or automatic close
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