Neptronic SP3035 Limit Switch
The Neptronic SP3035 Limit Switch provides critical over-temperature protection for commercial and residential HVAC systems, specifically designed as a L220 high-limit safety device. Featuring a manual reset (M/R) mechanism, this thermal cut-out ensures that power to the heating elements is interrupted if the duct or cabinet temperature exceeds the 220°F threshold. This prevents equipment burnout and enhances facility safety by requiring a physical inspection of the system before resuming operation.
Engineered for high-duty cycles, the SP3035 model is a standard replacement for Neptronic electric duct heaters, fan coil units, and unit heaters. Its compact, durable housing allows for straightforward mounting in tight electrical cabinets or heater frames. Professionals trust this OEM-quality HVAC limit switch for its reliable bimetal disc performance and precise temperature response, maintaining the integrity of the heat exchanger and surrounding components during airflow failure or high-heat events.
Key Benefits:
- Critical Heat Protection: Triggers at 220°F to isolate power and protect duct heaters from thermal damage.
- Verified Manual Reset: Forces a manual system check after a high-limit event, preventing dangerous continuous cycling.
- High Compatibility: Direct fit for numerous Neptronic HVAC equipment configurations and general electrical heating applications.
- Space-Saving Profile: Designed for easy integration into existing control panels without extensive rewiring.
- Industrial Grade Reliability: Built to meet or exceed original factory specifications for long-term safety in commercial air handlers.
Common Questions:
What is the primary difference between the SP3035 and an automatic reset switch?
The SP3035 is a manual reset switch, meaning once it trips at 220°F, it will not close the circuit again until the technician identifies the cause of overheating and manually depresses the reset button. Automatic switches reset themselves after cooling, which can hide underlying airflow issues.
Can this be used on heaters other than Neptronic brand?
Yes, while it is the standard Neptronic SP3035 replacement, it is compatible with any heating system requiring an L220 manual reset limit switch, provided the mounting dimensions and electrical ratings align with your equipment’s safety documentation.
How do I troubleshoot a tripped SP3035 limit switch?
If the switch has tripped, first inspect the air filters, blower motor, and duct dampers for restrictions. Once the system has cooled below the reset threshold, press the button on the switch. If it trips immediately upon restarting, further electrical diagnostics are required.
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
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Description
The Neptronic SP3035 Limit Switch provides critical over-temperature protection for commercial and residential HVAC systems, specifically designed as a L220 high-limit safety device. Featuring a manual reset (M/R) mechanism, this thermal cut-out ensures that power to the heating elements is interrupted if the duct or cabinet temperature exceeds the 220°F threshold. This prevents equipment burnout and enhances facility safety by requiring a physical inspection of the system before resuming operation.
Engineered for high-duty cycles, the SP3035 model is a standard replacement for Neptronic electric duct heaters, fan coil units, and unit heaters. Its compact, durable housing allows for straightforward mounting in tight electrical cabinets or heater frames. Professionals trust this OEM-quality HVAC limit switch for its reliable bimetal disc performance and precise temperature response, maintaining the integrity of the heat exchanger and surrounding components during airflow failure or high-heat events.
Key Benefits:
- Critical Heat Protection: Triggers at 220°F to isolate power and protect duct heaters from thermal damage.
- Verified Manual Reset: Forces a manual system check after a high-limit event, preventing dangerous continuous cycling.
- High Compatibility: Direct fit for numerous Neptronic HVAC equipment configurations and general electrical heating applications.
- Space-Saving Profile: Designed for easy integration into existing control panels without extensive rewiring.
- Industrial Grade Reliability: Built to meet or exceed original factory specifications for long-term safety in commercial air handlers.
Common Questions:
What is the primary difference between the SP3035 and an automatic reset switch?
The SP3035 is a manual reset switch, meaning once it trips at 220°F, it will not close the circuit again until the technician identifies the cause of overheating and manually depresses the reset button. Automatic switches reset themselves after cooling, which can hide underlying airflow issues.
Can this be used on heaters other than Neptronic brand?
Yes, while it is the standard Neptronic SP3035 replacement, it is compatible with any heating system requiring an L220 manual reset limit switch, provided the mounting dimensions and electrical ratings align with your equipment’s safety documentation.
How do I troubleshoot a tripped SP3035 limit switch?
If the switch has tripped, first inspect the air filters, blower motor, and duct dampers for restrictions. Once the system has cooled below the reset threshold, press the button on the switch. If it trips immediately upon restarting, further electrical diagnostics are required.
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.
