Lennox 99K29 Relay
The Lennox 99K29 Blower Overload Relay 20-32A is a critical industrial-grade bi-metallic thermal overload relay designed primarily for 3-phase blower motor protection in high-capacity HVAC systems. This OEM Lennox 99K29 replacement part (also identified as 99K2901) provides precise amperage management within a 20-32A range, effectively shielding motors from phase failure and sustained overcurrent conditions. Engineered for durability, it features adjustable trip settings to match the motor's full load amps (FLA) and a dedicated reset mechanism—switchable between manual and automatic modes—to maintain system uptime. This 600 VAC 3-phase relay is compatible with heavy-duty commercial units including the Lennox CHA16 and GCS16 series. For veteran contractors, the Lennox HVAC blower relay offers a direct-fit solution that ensures the thermal protection circuit remains within manufacturer specifications, preventing costly motor winding failures and ensuring long-term operational reliability in demanding rooftop and air handler applications.
Key Benefits for HVACR Technicians:- Precision Current Monitoring: Supports a wide 20-32 Amp range for tailored motor protection.
- 3-Phase Reliability: Specifically designed for 600 VAC 3-phase blower motors to prevent single-phasing damage.
- Flexible Reset Modes: Features a selectable blue reset dial for manual or automatic system recovery.
- OEM Compatibility: Replaces Lennox 99K2901 and integrates seamlessly with CHA16 and GCS16 series units.
- Thermal Overload Safeguard: Bi-metallic construction provides accurate response to ambient and electrical heat spikes.
What is the correct trip setting for the 99K29 relay?
The amperage setting should be adjusted based on the blower motor’s nameplate FLA multiplied by the service factor (typically 1.15) and a correction factor of 0.95. Always verify line voltage remains within the 600 VAC limit.
How do I test the trip functionality on this Lennox relay?
On most 99K29 models, technicians can use the red test button or slide the trip indicator to verify the normally closed contacts open correctly, interrupting the control circuit to the contactor.
Can this relay replace a different brand of 20-32A overload?
While the amperage range may match, this is an OEM-specific part designed for the physical mounting brackets and wiring harnesses of Lennox commercial equipment. Using it as a cross-reference for other brands may require field modifications not recommended for critical protection circuits.
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.
Lennox 99K29 Relay
The Lennox 99K29 Blower Overload Relay 20-32A is a critical industrial-grade bi-metallic thermal overload relay designed primarily for 3-phase blower motor protection in high-capacity HVAC systems. This OEM Lennox 99K29 replacement part (also identified as 99K2901) provides precise amperage management within a 20-32A range, effectively shielding motors from phase failure and sustained overcurrent conditions. Engineered for durability, it features adjustable trip settings to match the motor's full load amps (FLA) and a dedicated reset mechanism—switchable between manual and automatic modes—to maintain system uptime. This 600 VAC 3-phase relay is compatible with heavy-duty commercial units including the Lennox CHA16 and GCS16 series. For veteran contractors, the Lennox HVAC blower relay offers a direct-fit solution that ensures the thermal protection circuit remains within manufacturer specifications, preventing costly motor winding failures and ensuring long-term operational reliability in demanding rooftop and air handler applications.
Key Benefits for HVACR Technicians:- Precision Current Monitoring: Supports a wide 20-32 Amp range for tailored motor protection.
- 3-Phase Reliability: Specifically designed for 600 VAC 3-phase blower motors to prevent single-phasing damage.
- Flexible Reset Modes: Features a selectable blue reset dial for manual or automatic system recovery.
- OEM Compatibility: Replaces Lennox 99K2901 and integrates seamlessly with CHA16 and GCS16 series units.
- Thermal Overload Safeguard: Bi-metallic construction provides accurate response to ambient and electrical heat spikes.
What is the correct trip setting for the 99K29 relay?
The amperage setting should be adjusted based on the blower motor’s nameplate FLA multiplied by the service factor (typically 1.15) and a correction factor of 0.95. Always verify line voltage remains within the 600 VAC limit.
How do I test the trip functionality on this Lennox relay?
On most 99K29 models, technicians can use the red test button or slide the trip indicator to verify the normally closed contacts open correctly, interrupting the control circuit to the contactor.
Can this relay replace a different brand of 20-32A overload?
While the amperage range may match, this is an OEM-specific part designed for the physical mounting brackets and wiring harnesses of Lennox commercial equipment. Using it as a cross-reference for other brands may require field modifications not recommended for critical protection circuits.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Lennox 99K29 Blower Overload Relay 20-32A is a critical industrial-grade bi-metallic thermal overload relay designed primarily for 3-phase blower motor protection in high-capacity HVAC systems. This OEM Lennox 99K29 replacement part (also identified as 99K2901) provides precise amperage management within a 20-32A range, effectively shielding motors from phase failure and sustained overcurrent conditions. Engineered for durability, it features adjustable trip settings to match the motor's full load amps (FLA) and a dedicated reset mechanism—switchable between manual and automatic modes—to maintain system uptime. This 600 VAC 3-phase relay is compatible with heavy-duty commercial units including the Lennox CHA16 and GCS16 series. For veteran contractors, the Lennox HVAC blower relay offers a direct-fit solution that ensures the thermal protection circuit remains within manufacturer specifications, preventing costly motor winding failures and ensuring long-term operational reliability in demanding rooftop and air handler applications.
Key Benefits for HVACR Technicians:- Precision Current Monitoring: Supports a wide 20-32 Amp range for tailored motor protection.
- 3-Phase Reliability: Specifically designed for 600 VAC 3-phase blower motors to prevent single-phasing damage.
- Flexible Reset Modes: Features a selectable blue reset dial for manual or automatic system recovery.
- OEM Compatibility: Replaces Lennox 99K2901 and integrates seamlessly with CHA16 and GCS16 series units.
- Thermal Overload Safeguard: Bi-metallic construction provides accurate response to ambient and electrical heat spikes.
What is the correct trip setting for the 99K29 relay?
The amperage setting should be adjusted based on the blower motor’s nameplate FLA multiplied by the service factor (typically 1.15) and a correction factor of 0.95. Always verify line voltage remains within the 600 VAC limit.
How do I test the trip functionality on this Lennox relay?
On most 99K29 models, technicians can use the red test button or slide the trip indicator to verify the normally closed contacts open correctly, interrupting the control circuit to the contactor.
Can this relay replace a different brand of 20-32A overload?
While the amperage range may match, this is an OEM-specific part designed for the physical mounting brackets and wiring harnesses of Lennox commercial equipment. Using it as a cross-reference for other brands may require field modifications not recommended for critical protection circuits.
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.
