Marvair 50226 Thermostat
The Marvair 50226 Thermostat is a high-precision, 24V digital control engineered for 2-stage heating and cooling systems. Widely utilized in telecommunication shelters, modular buildings, and industrial HVAC applications, this unit provides veteran technicians with the granular control needed for sensitive environmental regulation. It features a large backlit display for visibility in low-light utility rooms and non-volatile memory to preserve setpoints during power outages.
Built for durability and accuracy (±1°F), the 50226 (also identified as AS7805 LL357D4) allows for field-adjustable staging differentials to prevent short-cycling and optimize compressor longevity. The low voltage thermostat supports a broad heating setpoint range from 55°F to 90°F and cooling setpoints from 45°F to 75°F. With a total electrical load capacity of 4 Amps and a 1 Amp max per terminal, it is a robust HVAC replacement part for Marvair ComPac I and II vertical wall-mount units.
Key Benefits:
- Advanced Staging Control: Fully adjustable first and second-stage differentials (up to 3°F and 6°F respectively) allow for precise tuning of 2-stage equipment.
- Enhanced System Monitoring: Integrated status LEDs provide immediate visual confirmation, lighting red for heating and green for cooling cycles.
- Maintenance Reminders: Includes a built-in filter check timer to track fan runtime and ensure consistent airflow.
- Reliable Data Retention: Setpoints are permanently held in memory without the need for battery backup during total power loss.
- Universal Calibration: Features room temperature offset calibration to match specific site conditions or secondary sensing equipment.
Common Questions:
Is the Marvair 50226 compatible with 1-stage systems?
While designed specifically for 2H/2C thermostat applications, it can be utilized in single-stage systems by using only the primary stage terminals; however, it is optimized for dual-stage efficiency.
Does this unit support Celsius readings?
Yes, the digital interface is field-selectable for both Fahrenheit and Celsius display modes.
How does the changeover differential work?
The changeover (deadband) is adjustable from 2°F to 9°F, providing a defined separation between heating and cooling modes to prevent simultaneous operation in auto-changeover configurations.
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: $266.88
-65%$266.88
$93.41Marvair 50226 Thermostat
The Marvair 50226 Thermostat is a high-precision, 24V digital control engineered for 2-stage heating and cooling systems. Widely utilized in telecommunication shelters, modular buildings, and industrial HVAC applications, this unit provides veteran technicians with the granular control needed for sensitive environmental regulation. It features a large backlit display for visibility in low-light utility rooms and non-volatile memory to preserve setpoints during power outages.
Built for durability and accuracy (±1°F), the 50226 (also identified as AS7805 LL357D4) allows for field-adjustable staging differentials to prevent short-cycling and optimize compressor longevity. The low voltage thermostat supports a broad heating setpoint range from 55°F to 90°F and cooling setpoints from 45°F to 75°F. With a total electrical load capacity of 4 Amps and a 1 Amp max per terminal, it is a robust HVAC replacement part for Marvair ComPac I and II vertical wall-mount units.
Key Benefits:
- Advanced Staging Control: Fully adjustable first and second-stage differentials (up to 3°F and 6°F respectively) allow for precise tuning of 2-stage equipment.
- Enhanced System Monitoring: Integrated status LEDs provide immediate visual confirmation, lighting red for heating and green for cooling cycles.
- Maintenance Reminders: Includes a built-in filter check timer to track fan runtime and ensure consistent airflow.
- Reliable Data Retention: Setpoints are permanently held in memory without the need for battery backup during total power loss.
- Universal Calibration: Features room temperature offset calibration to match specific site conditions or secondary sensing equipment.
Common Questions:
Is the Marvair 50226 compatible with 1-stage systems?
While designed specifically for 2H/2C thermostat applications, it can be utilized in single-stage systems by using only the primary stage terminals; however, it is optimized for dual-stage efficiency.
Does this unit support Celsius readings?
Yes, the digital interface is field-selectable for both Fahrenheit and Celsius display modes.
How does the changeover differential work?
The changeover (deadband) is adjustable from 2°F to 9°F, providing a defined separation between heating and cooling modes to prevent simultaneous operation in auto-changeover configurations.
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 Marvair 50226 Thermostat is a high-precision, 24V digital control engineered for 2-stage heating and cooling systems. Widely utilized in telecommunication shelters, modular buildings, and industrial HVAC applications, this unit provides veteran technicians with the granular control needed for sensitive environmental regulation. It features a large backlit display for visibility in low-light utility rooms and non-volatile memory to preserve setpoints during power outages.
Built for durability and accuracy (±1°F), the 50226 (also identified as AS7805 LL357D4) allows for field-adjustable staging differentials to prevent short-cycling and optimize compressor longevity. The low voltage thermostat supports a broad heating setpoint range from 55°F to 90°F and cooling setpoints from 45°F to 75°F. With a total electrical load capacity of 4 Amps and a 1 Amp max per terminal, it is a robust HVAC replacement part for Marvair ComPac I and II vertical wall-mount units.
Key Benefits:
- Advanced Staging Control: Fully adjustable first and second-stage differentials (up to 3°F and 6°F respectively) allow for precise tuning of 2-stage equipment.
- Enhanced System Monitoring: Integrated status LEDs provide immediate visual confirmation, lighting red for heating and green for cooling cycles.
- Maintenance Reminders: Includes a built-in filter check timer to track fan runtime and ensure consistent airflow.
- Reliable Data Retention: Setpoints are permanently held in memory without the need for battery backup during total power loss.
- Universal Calibration: Features room temperature offset calibration to match specific site conditions or secondary sensing equipment.
Common Questions:
Is the Marvair 50226 compatible with 1-stage systems?
While designed specifically for 2H/2C thermostat applications, it can be utilized in single-stage systems by using only the primary stage terminals; however, it is optimized for dual-stage efficiency.
Does this unit support Celsius readings?
Yes, the digital interface is field-selectable for both Fahrenheit and Celsius display modes.
How does the changeover differential work?
The changeover (deadband) is adjustable from 2°F to 9°F, providing a defined separation between heating and cooling modes to prevent simultaneous operation in auto-changeover configurations.
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.
