CARRIER Low or High Pressure Switch HK02ZB027

Low / High Pressure Switch – Product Description

The Low/High Pressure Switch is a vital safety and control component used in HVAC and refrigeration systems to monitor and manage refrigerant pressure levels. It automatically shuts down the compressor or activates alarms when the pressure exceeds safe high or low limits, protecting the system from damage and ensuring efficient operation.

This dual-function switch is commonly installed in air conditioners, chillers, cold storage systems, and industrial refrigeration setups. It is designed to handle fluctuating pressures and provide a reliable response under continuous use.

Applications

• Air conditioners and HVAC units

• Refrigeration compressors

• Cold rooms and chillers

• Heat pumps and industrial cooling systems

Features

• Monitors both low and high pressure in one unit

• Automatically engages or cuts off the system to prevent damage

• Compact, durable construction with corrosion-resistant housing

• Adjustable pressure range (model-dependent)

• Available in manual or automatic reset versions

Specifications

• Pressure Range: Varies by model (e.g., Low: 0.5–5 bar, High: 10–30 bar)

• Switch Type: SPST or SPDT

• Reset Type: Manual or automatic

• Material: Brass or stainless steel connections

• Connection Size: Standard 1/4” SAE or other options available