Lennox 11Y05 Commercial Thermostat
The Lennox 11Y05 (Model C0STAT05FF1L) is a ComfortSense 3000 series commercial programmable thermostat designed for 2-stage heat / 2-stage cool applications. Built for 24VAC conventional systems and heat pump units, this 5/2-day programmable controller allows for independent weekday and weekend schedules with up to four periods per day. As a non-communicating thermostat, it provides reliable digital temperature control without the complexity of Wi-Fi, making it a preferred choice for secure facilities and high-traffic commercial environments. It features manual changeover, a clear backlit LCD display, and large rubber buttons for tactile operation in demanding field conditions.
For advanced system management, the Lennox 11Y05 includes a programmable filter change reminder and equipment maintenance reminders to ensure long-term efficiency. Technicians can utilize the remote indoor sensor terminals (T, T) for averaged temperature sensing or to relocate sensing away from the thermostat body. The unit is equipped with a system check indicator for rapid diagnostics and is compatible with economizer controls via the OC (Occupancy) terminal, optimizing ventilation during occupied periods. Its Smooth Setback Recovery (SSR) feature ensures the building reaches the desired setpoint exactly at the start of the programmed period by gradually initiating the HVAC equipment.
Key Benefits
- Multi-Stage Compatibility: Supports conventional 2-stage heating and cooling or heat pump systems (2–20 tons) using 24VAC power.
- Industrial Durability: Rugged construction with non-volatile memory to retain programming during power outages.
- Precision Calibration: Adjust temperature offsets and sensor selection via on-board DIP switch settings.
- Occupancy Control: Dedicated OC terminal provides an interface for commercial economizer or fresh air damper integration.
- Maintenance Triggers: User-selectable alerts for HVAC filter replacement and professional service intervals.
Common Questions
- Does the 11Y05 support automatic changeover between heat and cool? No, this commercial thermostat is a manual changeover model, requiring the user to select the mode via the front interface.
- Can I use a remote sensor with this model? Yes, it is compatible with the Lennox 47W37 remote indoor sensor to monitor air temperature from a distant location.
- Is this unit compatible with small split heat pumps? This model is specifically intended for commercial packaged heat pumps and split systems 7 tons and larger; it is not recommended for 3–5 ton residential-style split heat pumps.
- How does the Smooth Setback Recovery work? It calculates how much time is needed to hit the setpoint and starts the stages early so the space is comfortable as soon as the occupancy schedule begins.
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: $220.05
-65%$220.05
$77.02Lennox 11Y05 Commercial Thermostat
The Lennox 11Y05 (Model C0STAT05FF1L) is a ComfortSense 3000 series commercial programmable thermostat designed for 2-stage heat / 2-stage cool applications. Built for 24VAC conventional systems and heat pump units, this 5/2-day programmable controller allows for independent weekday and weekend schedules with up to four periods per day. As a non-communicating thermostat, it provides reliable digital temperature control without the complexity of Wi-Fi, making it a preferred choice for secure facilities and high-traffic commercial environments. It features manual changeover, a clear backlit LCD display, and large rubber buttons for tactile operation in demanding field conditions.
For advanced system management, the Lennox 11Y05 includes a programmable filter change reminder and equipment maintenance reminders to ensure long-term efficiency. Technicians can utilize the remote indoor sensor terminals (T, T) for averaged temperature sensing or to relocate sensing away from the thermostat body. The unit is equipped with a system check indicator for rapid diagnostics and is compatible with economizer controls via the OC (Occupancy) terminal, optimizing ventilation during occupied periods. Its Smooth Setback Recovery (SSR) feature ensures the building reaches the desired setpoint exactly at the start of the programmed period by gradually initiating the HVAC equipment.
Key Benefits
- Multi-Stage Compatibility: Supports conventional 2-stage heating and cooling or heat pump systems (2–20 tons) using 24VAC power.
- Industrial Durability: Rugged construction with non-volatile memory to retain programming during power outages.
- Precision Calibration: Adjust temperature offsets and sensor selection via on-board DIP switch settings.
- Occupancy Control: Dedicated OC terminal provides an interface for commercial economizer or fresh air damper integration.
- Maintenance Triggers: User-selectable alerts for HVAC filter replacement and professional service intervals.
Common Questions
- Does the 11Y05 support automatic changeover between heat and cool? No, this commercial thermostat is a manual changeover model, requiring the user to select the mode via the front interface.
- Can I use a remote sensor with this model? Yes, it is compatible with the Lennox 47W37 remote indoor sensor to monitor air temperature from a distant location.
- Is this unit compatible with small split heat pumps? This model is specifically intended for commercial packaged heat pumps and split systems 7 tons and larger; it is not recommended for 3–5 ton residential-style split heat pumps.
- How does the Smooth Setback Recovery work? It calculates how much time is needed to hit the setpoint and starts the stages early so the space is comfortable as soon as the occupancy schedule begins.
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 11Y05 (Model C0STAT05FF1L) is a ComfortSense 3000 series commercial programmable thermostat designed for 2-stage heat / 2-stage cool applications. Built for 24VAC conventional systems and heat pump units, this 5/2-day programmable controller allows for independent weekday and weekend schedules with up to four periods per day. As a non-communicating thermostat, it provides reliable digital temperature control without the complexity of Wi-Fi, making it a preferred choice for secure facilities and high-traffic commercial environments. It features manual changeover, a clear backlit LCD display, and large rubber buttons for tactile operation in demanding field conditions.
For advanced system management, the Lennox 11Y05 includes a programmable filter change reminder and equipment maintenance reminders to ensure long-term efficiency. Technicians can utilize the remote indoor sensor terminals (T, T) for averaged temperature sensing or to relocate sensing away from the thermostat body. The unit is equipped with a system check indicator for rapid diagnostics and is compatible with economizer controls via the OC (Occupancy) terminal, optimizing ventilation during occupied periods. Its Smooth Setback Recovery (SSR) feature ensures the building reaches the desired setpoint exactly at the start of the programmed period by gradually initiating the HVAC equipment.
Key Benefits
- Multi-Stage Compatibility: Supports conventional 2-stage heating and cooling or heat pump systems (2–20 tons) using 24VAC power.
- Industrial Durability: Rugged construction with non-volatile memory to retain programming during power outages.
- Precision Calibration: Adjust temperature offsets and sensor selection via on-board DIP switch settings.
- Occupancy Control: Dedicated OC terminal provides an interface for commercial economizer or fresh air damper integration.
- Maintenance Triggers: User-selectable alerts for HVAC filter replacement and professional service intervals.
Common Questions
- Does the 11Y05 support automatic changeover between heat and cool? No, this commercial thermostat is a manual changeover model, requiring the user to select the mode via the front interface.
- Can I use a remote sensor with this model? Yes, it is compatible with the Lennox 47W37 remote indoor sensor to monitor air temperature from a distant location.
- Is this unit compatible with small split heat pumps? This model is specifically intended for commercial packaged heat pumps and split systems 7 tons and larger; it is not recommended for 3–5 ton residential-style split heat pumps.
- How does the Smooth Setback Recovery work? It calculates how much time is needed to hit the setpoint and starts the stages early so the space is comfortable as soon as the occupancy schedule begins.
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.
