Cleveland Controls NS2-503-00 Pressure Switch
The Cleveland Controls NS2-0503-00 is a high-performance narrow-differential air pressure sensing switch designed for reliable HVAC furnace draft monitoring and proving airflow in residential and light commercial applications. Engineered with a fixed set point of 0.96" W.C., this diaphragm-operated switch ensures precise combustion blower safety by detecting pressure drops or venting obstructions. The NS2-0503-00 features a rugged polycarbonate housing and a silicone diaphragm, maintaining consistent calibration even under varying temperature ranges common in attic or mechanical room installations. As a critical furnace pressure switch replacement, it utilizes standard 3/16" barbed pressure ports and 1/4" quick-connect terminals for seamless integration into existing 24V control circuits. This switch is calibrated for vertical mounting with the diaphragm positioned vertically to ensure maximum accuracy and prevent premature SPNO contact failure, making it an essential component for technicians maintaining high-efficiency heating systems and secondary heat exchangers.
Key Benefits for Contractors
- Pre-calibrated 0.96" W.C. set point eliminates field adjustment errors and reduces installation time.
- Robust SPNO (Single Pole Normally Open) electrical configuration ensures compatibility with standard integrated furnace controllers.
- High-durability silicone diaphragm resists aging and maintains sensitivity in demanding mechanical venting environments.
- Universal mounting bracket design facilitates easy replacement for a wide range of OEM burner and draft inducer assemblies.
- Engineered for safety circuit integration, providing reliable lockout protection during vent blockage or inducer motor failure.
Technical FAQ
Can the NS2-0503-00 be used in positive or negative pressure applications?
Yes, this switch is designed to sense positive, negative, or differential pressure. For negative pressure setups, connect the sensing line to the gray (high) port.
What causes a pressure switch to stay open during the furnace ignition sequence?
Common causes include restricted flue venting, a failing inducer motor, cracked heat exchangers, or moisture buildup in the vacuum tubing. Ensure the 0.96" W.C. requirement meets the specific OEM blower curve.
Is this switch compatible with systems requiring different set points?
No, pressure switches must be matched exactly to the manufacturer's specified W.C. rating. Installing a switch with an incorrect set point can result in unsafe operating conditions or nuisance furnace lockouts.
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: $42.06
-65%$42.06
$14.72Cleveland Controls NS2-503-00 Pressure Switch
The Cleveland Controls NS2-0503-00 is a high-performance narrow-differential air pressure sensing switch designed for reliable HVAC furnace draft monitoring and proving airflow in residential and light commercial applications. Engineered with a fixed set point of 0.96" W.C., this diaphragm-operated switch ensures precise combustion blower safety by detecting pressure drops or venting obstructions. The NS2-0503-00 features a rugged polycarbonate housing and a silicone diaphragm, maintaining consistent calibration even under varying temperature ranges common in attic or mechanical room installations. As a critical furnace pressure switch replacement, it utilizes standard 3/16" barbed pressure ports and 1/4" quick-connect terminals for seamless integration into existing 24V control circuits. This switch is calibrated for vertical mounting with the diaphragm positioned vertically to ensure maximum accuracy and prevent premature SPNO contact failure, making it an essential component for technicians maintaining high-efficiency heating systems and secondary heat exchangers.
Key Benefits for Contractors
- Pre-calibrated 0.96" W.C. set point eliminates field adjustment errors and reduces installation time.
- Robust SPNO (Single Pole Normally Open) electrical configuration ensures compatibility with standard integrated furnace controllers.
- High-durability silicone diaphragm resists aging and maintains sensitivity in demanding mechanical venting environments.
- Universal mounting bracket design facilitates easy replacement for a wide range of OEM burner and draft inducer assemblies.
- Engineered for safety circuit integration, providing reliable lockout protection during vent blockage or inducer motor failure.
Technical FAQ
Can the NS2-0503-00 be used in positive or negative pressure applications?
Yes, this switch is designed to sense positive, negative, or differential pressure. For negative pressure setups, connect the sensing line to the gray (high) port.
What causes a pressure switch to stay open during the furnace ignition sequence?
Common causes include restricted flue venting, a failing inducer motor, cracked heat exchangers, or moisture buildup in the vacuum tubing. Ensure the 0.96" W.C. requirement meets the specific OEM blower curve.
Is this switch compatible with systems requiring different set points?
No, pressure switches must be matched exactly to the manufacturer's specified W.C. rating. Installing a switch with an incorrect set point can result in unsafe operating conditions or nuisance furnace lockouts.
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 Cleveland Controls NS2-0503-00 is a high-performance narrow-differential air pressure sensing switch designed for reliable HVAC furnace draft monitoring and proving airflow in residential and light commercial applications. Engineered with a fixed set point of 0.96" W.C., this diaphragm-operated switch ensures precise combustion blower safety by detecting pressure drops or venting obstructions. The NS2-0503-00 features a rugged polycarbonate housing and a silicone diaphragm, maintaining consistent calibration even under varying temperature ranges common in attic or mechanical room installations. As a critical furnace pressure switch replacement, it utilizes standard 3/16" barbed pressure ports and 1/4" quick-connect terminals for seamless integration into existing 24V control circuits. This switch is calibrated for vertical mounting with the diaphragm positioned vertically to ensure maximum accuracy and prevent premature SPNO contact failure, making it an essential component for technicians maintaining high-efficiency heating systems and secondary heat exchangers.
Key Benefits for Contractors
- Pre-calibrated 0.96" W.C. set point eliminates field adjustment errors and reduces installation time.
- Robust SPNO (Single Pole Normally Open) electrical configuration ensures compatibility with standard integrated furnace controllers.
- High-durability silicone diaphragm resists aging and maintains sensitivity in demanding mechanical venting environments.
- Universal mounting bracket design facilitates easy replacement for a wide range of OEM burner and draft inducer assemblies.
- Engineered for safety circuit integration, providing reliable lockout protection during vent blockage or inducer motor failure.
Technical FAQ
Can the NS2-0503-00 be used in positive or negative pressure applications?
Yes, this switch is designed to sense positive, negative, or differential pressure. For negative pressure setups, connect the sensing line to the gray (high) port.
What causes a pressure switch to stay open during the furnace ignition sequence?
Common causes include restricted flue venting, a failing inducer motor, cracked heat exchangers, or moisture buildup in the vacuum tubing. Ensure the 0.96" W.C. requirement meets the specific OEM blower curve.
Is this switch compatible with systems requiring different set points?
No, pressure switches must be matched exactly to the manufacturer's specified W.C. rating. Installing a switch with an incorrect set point can result in unsafe operating conditions or nuisance furnace lockouts.
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.
