Mars 33330 Pressure Control

Product Description

The MARS 33330 is a pressure control switch designed for use in HVAC refrigeration systems. Pressure controls monitor system pressure and interrupt the electrical circuit when pressure falls outside the normal operating range, protecting compressors and other system components from damage caused by low- or high-pressure conditions. This part is typically installed by licensed HVAC technicians during system service, commissioning, or component replacement. It serves as a critical safety and operational device within the refrigerant circuit.

The MARS 33330 is suited for residential and light commercial HVAC and refrigeration applications where pressure-based safety shutoff is required. It is commonly installed in the suction or discharge line of a refrigerant circuit, depending on the application. The part number 43343 is also associated with this control, which may indicate a superseded or cross-reference number from the supplier.

Key Features

• Pressure-actuated switch interrupts circuit on out-of-range pressure conditions
• Protects compressor from low- and high-pressure damage
• Compatible with standard HVAC refrigerant circuit installations
• Compact design for installation in tight equipment spaces

Compatibility

Designed as an OEM-style replacement pressure control for residential and light commercial HVAC and refrigeration systems requiring pressure-based circuit protection.

Installation Notes

Installation should be performed by a licensed HVAC technician. Recover all refrigerant and verify system pressure is at zero before opening the refrigerant circuit. Follow all applicable local codes and EPA Section 608 regulations when handling refrigerants. Do not energize the system until all connections are leak-tested and verified secure.

Technical Specifications

• UPC: 68574433330

Standard Information

• Brand: MARS
• Manufacturer Part Number: 33330