EWC Controls CPLS Switch
The EWC Controls CPLS Switch is a mission-critical safety component designed to prevent evaporator coil freeze-up in residential and commercial cooling systems. Engineered for high-reliability freeze protection, this coil protection lockout switch monitors the temperature of the suction line and interrupts the cooling call to the compressor if suction line icing conditions are detected. By opening at 37°F and automatically closing at 47°F, the CPLS ensures the system remains within safe operating parameters, protecting the compressor from liquid slugging and preventing potential water damage from ice melt.
For a proper field installation, mount the HVAC freeze stat securely on a 3/4" or 7/8" suction line, ideally inside the evaporator cabinet near the manifold. The curved sensing surface must maintain direct contact with the copper pipe; avoid mounting on the bottom of the line where oil or condensate accumulation can skew readings. Technicians should wire the switch in series with the 'Y' cooling lead from the thermostat or zone control panel. To ensure maximum system stability and prevent rapid cycling, it is highly recommended to integrate this switch with a compressor time delay relay.
Key Benefits for the Contractor:- Optimized Coil Safety: Actively prevents evaporator coil freezing by maintaining a hard 37°F/47°F operating differential.
- Universal Compatibility: Designed for seamless integration with EWC Ultra-Zone panels and most standard 24VAC cooling circuits.
- Field-Proven Durability: Robust construction facilitates long-term performance in demanding air handler environments.
- Standardized Mounting: Precision-curved sensor fits 3/4" or 7/8" OD suction lines for accurate thermal transfer.
- Automatic Reset: Eliminates nuisance manual resets by restoring the compressor circuit once the line reaches 47°F.
Where is the best place to mount the CPLS switch?
For the most accurate temperature sensing, install the switch on the suction line inside the evaporator cabinet, immediately after the evaporator manifold. Ensure the sensor is insulated with foam or cork tape to prevent ambient air from affecting the trip points.
Can I use this switch on a 1-1/8" suction line?
No. The curvature of the CPLS is specifically designed for 3/4" and 7/8" OD pipes. Using it on larger diameters will result in poor surface contact and inaccurate temperature monitoring.
Does this replace a low-pressure cutout switch?
While both protect the compressor, the CPLS is a thermal-actuated safety. It works best as a secondary layer of protection alongside a low-pressure switch to specifically target coil freeze-up caused by airflow issues or low refrigerant charge.
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: $27.86
-65%$27.86
$9.75EWC Controls CPLS Switch
The EWC Controls CPLS Switch is a mission-critical safety component designed to prevent evaporator coil freeze-up in residential and commercial cooling systems. Engineered for high-reliability freeze protection, this coil protection lockout switch monitors the temperature of the suction line and interrupts the cooling call to the compressor if suction line icing conditions are detected. By opening at 37°F and automatically closing at 47°F, the CPLS ensures the system remains within safe operating parameters, protecting the compressor from liquid slugging and preventing potential water damage from ice melt.
For a proper field installation, mount the HVAC freeze stat securely on a 3/4" or 7/8" suction line, ideally inside the evaporator cabinet near the manifold. The curved sensing surface must maintain direct contact with the copper pipe; avoid mounting on the bottom of the line where oil or condensate accumulation can skew readings. Technicians should wire the switch in series with the 'Y' cooling lead from the thermostat or zone control panel. To ensure maximum system stability and prevent rapid cycling, it is highly recommended to integrate this switch with a compressor time delay relay.
Key Benefits for the Contractor:- Optimized Coil Safety: Actively prevents evaporator coil freezing by maintaining a hard 37°F/47°F operating differential.
- Universal Compatibility: Designed for seamless integration with EWC Ultra-Zone panels and most standard 24VAC cooling circuits.
- Field-Proven Durability: Robust construction facilitates long-term performance in demanding air handler environments.
- Standardized Mounting: Precision-curved sensor fits 3/4" or 7/8" OD suction lines for accurate thermal transfer.
- Automatic Reset: Eliminates nuisance manual resets by restoring the compressor circuit once the line reaches 47°F.
Where is the best place to mount the CPLS switch?
For the most accurate temperature sensing, install the switch on the suction line inside the evaporator cabinet, immediately after the evaporator manifold. Ensure the sensor is insulated with foam or cork tape to prevent ambient air from affecting the trip points.
Can I use this switch on a 1-1/8" suction line?
No. The curvature of the CPLS is specifically designed for 3/4" and 7/8" OD pipes. Using it on larger diameters will result in poor surface contact and inaccurate temperature monitoring.
Does this replace a low-pressure cutout switch?
While both protect the compressor, the CPLS is a thermal-actuated safety. It works best as a secondary layer of protection alongside a low-pressure switch to specifically target coil freeze-up caused by airflow issues or low refrigerant charge.
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 EWC Controls CPLS Switch is a mission-critical safety component designed to prevent evaporator coil freeze-up in residential and commercial cooling systems. Engineered for high-reliability freeze protection, this coil protection lockout switch monitors the temperature of the suction line and interrupts the cooling call to the compressor if suction line icing conditions are detected. By opening at 37°F and automatically closing at 47°F, the CPLS ensures the system remains within safe operating parameters, protecting the compressor from liquid slugging and preventing potential water damage from ice melt.
For a proper field installation, mount the HVAC freeze stat securely on a 3/4" or 7/8" suction line, ideally inside the evaporator cabinet near the manifold. The curved sensing surface must maintain direct contact with the copper pipe; avoid mounting on the bottom of the line where oil or condensate accumulation can skew readings. Technicians should wire the switch in series with the 'Y' cooling lead from the thermostat or zone control panel. To ensure maximum system stability and prevent rapid cycling, it is highly recommended to integrate this switch with a compressor time delay relay.
Key Benefits for the Contractor:- Optimized Coil Safety: Actively prevents evaporator coil freezing by maintaining a hard 37°F/47°F operating differential.
- Universal Compatibility: Designed for seamless integration with EWC Ultra-Zone panels and most standard 24VAC cooling circuits.
- Field-Proven Durability: Robust construction facilitates long-term performance in demanding air handler environments.
- Standardized Mounting: Precision-curved sensor fits 3/4" or 7/8" OD suction lines for accurate thermal transfer.
- Automatic Reset: Eliminates nuisance manual resets by restoring the compressor circuit once the line reaches 47°F.
Where is the best place to mount the CPLS switch?
For the most accurate temperature sensing, install the switch on the suction line inside the evaporator cabinet, immediately after the evaporator manifold. Ensure the sensor is insulated with foam or cork tape to prevent ambient air from affecting the trip points.
Can I use this switch on a 1-1/8" suction line?
No. The curvature of the CPLS is specifically designed for 3/4" and 7/8" OD pipes. Using it on larger diameters will result in poor surface contact and inaccurate temperature monitoring.
Does this replace a low-pressure cutout switch?
While both protect the compressor, the CPLS is a thermal-actuated safety. It works best as a secondary layer of protection alongside a low-pressure switch to specifically target coil freeze-up caused by airflow issues or low refrigerant charge.
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.
