Reznor 210855 Limit Switch
The Reznor 210855 Limit Switch is a critical high-limit safety component designed for precise thermal monitoring in commercial unit heaters and air handlers. Engineered as an L240F manual reset limit switch, this device is calibrated to trip at 240°F, effectively interrupting the power supply to the heating circuit to prevent unit damage or safety hazards. This specific HVAC high limit control features a 60-inch capillary, providing the necessary reach for accurate sensing across standard heat exchangers.
For technicians performing Reznor heater maintenance, this OEM part serves as a direct replacement limit switch for several popular models, including the PDH, SDH, RDH, and SHH series. Because it is a manual reset (M/R) switch, it requires professional intervention to diagnose the cause of the high-limit trip before the system can be restarted, ensuring that airflow obstructions or mechanical failures are addressed. This robust design is fundamental for maintaining the operational integrity of gas-fired unit heaters in industrial environments.
Key Benefits- OEM Compatibility: Fully compatible with Reznor PDH, SDH, RDH, and SHH series air handlers.
- Precise Safety Trip: Calibrated to 240°F (L240F) to protect the heat exchanger from critical overheating.
- Direct Sensing: Includes a 60-inch capillary for flexible and accurate temperature monitoring.
- Manual Reset Mechanism: Ensures system lockout until a technician can verify safe operating conditions.
Is the Reznor 210855 an automatic or manual reset switch?
This is a manual reset (M/R) limit switch. Unlike auto-reset switches, this requires a physical press of the reset button to restore burner operation after a 240°F trip occurs.
What models does this limit switch fit?
It is primarily utilized in Reznor gas-fired separated combustion units and air handlers, specifically models in the 175-180 MBH range such as the RDH 175 and PDH 175.
What does the 'L240F' designation mean?
The 'L' stands for Limit, and '240F' indicates the fixed temperature threshold where the switch opens. Once the temperature at the capillary bulb exceeds 240°F, the switch breaks the circuit.
This item is not eligible for free shipping.
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: $86.65
-65%$86.65
$30.33Reznor 210855 Limit Switch
The Reznor 210855 Limit Switch is a critical high-limit safety component designed for precise thermal monitoring in commercial unit heaters and air handlers. Engineered as an L240F manual reset limit switch, this device is calibrated to trip at 240°F, effectively interrupting the power supply to the heating circuit to prevent unit damage or safety hazards. This specific HVAC high limit control features a 60-inch capillary, providing the necessary reach for accurate sensing across standard heat exchangers.
For technicians performing Reznor heater maintenance, this OEM part serves as a direct replacement limit switch for several popular models, including the PDH, SDH, RDH, and SHH series. Because it is a manual reset (M/R) switch, it requires professional intervention to diagnose the cause of the high-limit trip before the system can be restarted, ensuring that airflow obstructions or mechanical failures are addressed. This robust design is fundamental for maintaining the operational integrity of gas-fired unit heaters in industrial environments.
Key Benefits- OEM Compatibility: Fully compatible with Reznor PDH, SDH, RDH, and SHH series air handlers.
- Precise Safety Trip: Calibrated to 240°F (L240F) to protect the heat exchanger from critical overheating.
- Direct Sensing: Includes a 60-inch capillary for flexible and accurate temperature monitoring.
- Manual Reset Mechanism: Ensures system lockout until a technician can verify safe operating conditions.
Is the Reznor 210855 an automatic or manual reset switch?
This is a manual reset (M/R) limit switch. Unlike auto-reset switches, this requires a physical press of the reset button to restore burner operation after a 240°F trip occurs.
What models does this limit switch fit?
It is primarily utilized in Reznor gas-fired separated combustion units and air handlers, specifically models in the 175-180 MBH range such as the RDH 175 and PDH 175.
What does the 'L240F' designation mean?
The 'L' stands for Limit, and '240F' indicates the fixed temperature threshold where the switch opens. Once the temperature at the capillary bulb exceeds 240°F, the switch breaks the circuit.
This item is not eligible for free shipping.
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.
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Description
The Reznor 210855 Limit Switch is a critical high-limit safety component designed for precise thermal monitoring in commercial unit heaters and air handlers. Engineered as an L240F manual reset limit switch, this device is calibrated to trip at 240°F, effectively interrupting the power supply to the heating circuit to prevent unit damage or safety hazards. This specific HVAC high limit control features a 60-inch capillary, providing the necessary reach for accurate sensing across standard heat exchangers.
For technicians performing Reznor heater maintenance, this OEM part serves as a direct replacement limit switch for several popular models, including the PDH, SDH, RDH, and SHH series. Because it is a manual reset (M/R) switch, it requires professional intervention to diagnose the cause of the high-limit trip before the system can be restarted, ensuring that airflow obstructions or mechanical failures are addressed. This robust design is fundamental for maintaining the operational integrity of gas-fired unit heaters in industrial environments.
Key Benefits- OEM Compatibility: Fully compatible with Reznor PDH, SDH, RDH, and SHH series air handlers.
- Precise Safety Trip: Calibrated to 240°F (L240F) to protect the heat exchanger from critical overheating.
- Direct Sensing: Includes a 60-inch capillary for flexible and accurate temperature monitoring.
- Manual Reset Mechanism: Ensures system lockout until a technician can verify safe operating conditions.
Is the Reznor 210855 an automatic or manual reset switch?
This is a manual reset (M/R) limit switch. Unlike auto-reset switches, this requires a physical press of the reset button to restore burner operation after a 240°F trip occurs.
What models does this limit switch fit?
It is primarily utilized in Reznor gas-fired separated combustion units and air handlers, specifically models in the 175-180 MBH range such as the RDH 175 and PDH 175.
What does the 'L240F' designation mean?
The 'L' stands for Limit, and '240F' indicates the fixed temperature threshold where the switch opens. Once the temperature at the capillary bulb exceeds 240°F, the switch breaks the circuit.
This item is not eligible for free shipping.
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.
