Marvair 70342 Pressure Switch
The Marvair 70342 Low Pressure Switch is an essential safety component designed for precise refrigerant monitoring in high-performance HVAC units. Engineered with a Normally Open (N/O) contact configuration, this switch functions as a critical loss of charge protector by opening the electrical circuit when system pressure drops to 40 PSI, effectively preventing compressor operation under hazardous low-pressure conditions. Once suction pressure recovers to the 60 PSI reset point, the contacts close, allowing the system to resume normal cooling cycles.
For field technicians and contractors, the Marvair 70342 offers a reliable solution for maintaining refrigerant pressure regulation and protecting expensive scroll or reciprocating compressors from overheating or oil migration issues. This specific HVAC pressure switch is a direct OEM replacement part widely utilized in Marvair ComPac and wall-mount air conditioning systems frequently found in telecommunication shelters and industrial equipment rooms. The durable housing is built to withstand extreme vibration and environmental stress, ensuring long-term system reliability in mission-critical applications.
Key Benefits for HVACR Technicians:- Precise Pressure Calibration: Factory-set at 40 PSI OFF and 60 PSI ON to ensure optimal compressor protection without frequent nuisance tripping.
- Normally Open Logic: Acts as a reliable low-pressure cutout to safeguard against refrigerant leaks or coil freeze-ups.
- Broad Compatibility: Primarily utilized in Marvair ComPac vertical wall-mount units and specialized industrial HVAC systems.
- Durable Construction: Heavy-duty electrical contacts and a resilient casing designed for the high-duty cycles of commercial refrigeration and cooling.
What happens if the pressure stays below 40 PSI?
The Normally Open contacts will remain open, preventing the compressor contactor from energizing. This prevents the unit from running without sufficient refrigerant, which could lead to mechanical failure.
Can this switch be used with R-410A systems?
Yes, the Marvair 70342 is frequently specified for use in modern R-410A Marvair equipment as a secondary safety or loss-of-charge sensor depending on the specific control board logic.
Is this switch field-adjustable?
No, this is a fixed-range encapsulated pressure switch. If your application requires different set points, verify the technical data on the existing hardware before installation.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $35.31
-65%$35.31
$12.36Marvair 70342 Pressure Switch
The Marvair 70342 Low Pressure Switch is an essential safety component designed for precise refrigerant monitoring in high-performance HVAC units. Engineered with a Normally Open (N/O) contact configuration, this switch functions as a critical loss of charge protector by opening the electrical circuit when system pressure drops to 40 PSI, effectively preventing compressor operation under hazardous low-pressure conditions. Once suction pressure recovers to the 60 PSI reset point, the contacts close, allowing the system to resume normal cooling cycles.
For field technicians and contractors, the Marvair 70342 offers a reliable solution for maintaining refrigerant pressure regulation and protecting expensive scroll or reciprocating compressors from overheating or oil migration issues. This specific HVAC pressure switch is a direct OEM replacement part widely utilized in Marvair ComPac and wall-mount air conditioning systems frequently found in telecommunication shelters and industrial equipment rooms. The durable housing is built to withstand extreme vibration and environmental stress, ensuring long-term system reliability in mission-critical applications.
Key Benefits for HVACR Technicians:- Precise Pressure Calibration: Factory-set at 40 PSI OFF and 60 PSI ON to ensure optimal compressor protection without frequent nuisance tripping.
- Normally Open Logic: Acts as a reliable low-pressure cutout to safeguard against refrigerant leaks or coil freeze-ups.
- Broad Compatibility: Primarily utilized in Marvair ComPac vertical wall-mount units and specialized industrial HVAC systems.
- Durable Construction: Heavy-duty electrical contacts and a resilient casing designed for the high-duty cycles of commercial refrigeration and cooling.
What happens if the pressure stays below 40 PSI?
The Normally Open contacts will remain open, preventing the compressor contactor from energizing. This prevents the unit from running without sufficient refrigerant, which could lead to mechanical failure.
Can this switch be used with R-410A systems?
Yes, the Marvair 70342 is frequently specified for use in modern R-410A Marvair equipment as a secondary safety or loss-of-charge sensor depending on the specific control board logic.
Is this switch field-adjustable?
No, this is a fixed-range encapsulated pressure switch. If your application requires different set points, verify the technical data on the existing hardware before installation.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Marvair 70342 Low Pressure Switch is an essential safety component designed for precise refrigerant monitoring in high-performance HVAC units. Engineered with a Normally Open (N/O) contact configuration, this switch functions as a critical loss of charge protector by opening the electrical circuit when system pressure drops to 40 PSI, effectively preventing compressor operation under hazardous low-pressure conditions. Once suction pressure recovers to the 60 PSI reset point, the contacts close, allowing the system to resume normal cooling cycles.
For field technicians and contractors, the Marvair 70342 offers a reliable solution for maintaining refrigerant pressure regulation and protecting expensive scroll or reciprocating compressors from overheating or oil migration issues. This specific HVAC pressure switch is a direct OEM replacement part widely utilized in Marvair ComPac and wall-mount air conditioning systems frequently found in telecommunication shelters and industrial equipment rooms. The durable housing is built to withstand extreme vibration and environmental stress, ensuring long-term system reliability in mission-critical applications.
Key Benefits for HVACR Technicians:- Precise Pressure Calibration: Factory-set at 40 PSI OFF and 60 PSI ON to ensure optimal compressor protection without frequent nuisance tripping.
- Normally Open Logic: Acts as a reliable low-pressure cutout to safeguard against refrigerant leaks or coil freeze-ups.
- Broad Compatibility: Primarily utilized in Marvair ComPac vertical wall-mount units and specialized industrial HVAC systems.
- Durable Construction: Heavy-duty electrical contacts and a resilient casing designed for the high-duty cycles of commercial refrigeration and cooling.
What happens if the pressure stays below 40 PSI?
The Normally Open contacts will remain open, preventing the compressor contactor from energizing. This prevents the unit from running without sufficient refrigerant, which could lead to mechanical failure.
Can this switch be used with R-410A systems?
Yes, the Marvair 70342 is frequently specified for use in modern R-410A Marvair equipment as a secondary safety or loss-of-charge sensor depending on the specific control board logic.
Is this switch field-adjustable?
No, this is a fixed-range encapsulated pressure switch. If your application requires different set points, verify the technical data on the existing hardware before installation.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
