Tekmar Controls 257 Control
The Tekmar Controls 257 Control is a purpose-built 24Vac domestic hot water two stage boiler control designed for high-demand applications such as hotels, laundromats, and multi-family residential complexes. This sophisticated microprocessor control provides high-accuracy domestic hot water temperature regulation by effectively staging up to two on/off boilers or a single two-stage boiler. Utilizing an NTC thermistor 10k ohm sensor, the 257 maintains precise tank setpoint temperatures, ensuring quick recovery times and consistent system performance even under heavy loads.
For the service contractor, the unit features equal runtime rotation to balance wear across the plant and detailed cumulative boiler run time hours logging for preventative maintenance. Technicians can toggle between Proportional (P) or PID staging modes via the three-button digital interface to fine-tune the staging logic and stage mode delay. The Tekmar 257 is housed in a durable NEMA 1 PVC enclosure and is compatible with standard 24V (ac) power supplies, making it a reliable drop-in solution for dedicated DHW volume water heating systems.
Key Benefits for the Contractor:- Enhanced System Longevity: The equal runtime rotation prevents excessive cycles on a lead boiler, extending the life of the entire heating plant.
- Flexible Staging Logic: Choose between PID control for tight temperature response or manual proportional staging to match specific facility requirements.
- Operational Visibility: Monitor the cumulative boiler run time through the LCD to simplify reporting and troubleshooting.
- Universal Compatibility: Operates at 24Vac and manages relays rated for 240V, allowing integration with a wide variety of commercial boiler types.
How do I handle an 'OPN' error code on the display?
An 'OPN' message indicates an open electrical circuit on the sensor input. Verify the 10k ohm sensor wiring at the terminals and test the thermistor for proper resistance based on the current tank temperature.
Can this control manage more than two stages?
The Tekmar 257 is specifically designed as a two stage boiler control. For systems requiring additional staging or outdoor reset functionality, consider a larger multi-staging controller from the Tekmar line.
What is the difference between PID and Proportional staging on this unit?
PID mode uses advanced algorithms to minimize temperature fluctuations around the setpoint, while Proportional mode relies on fixed differentials for traditional multi-boiler staging settings.
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.
Tekmar Controls 257 Control
The Tekmar Controls 257 Control is a purpose-built 24Vac domestic hot water two stage boiler control designed for high-demand applications such as hotels, laundromats, and multi-family residential complexes. This sophisticated microprocessor control provides high-accuracy domestic hot water temperature regulation by effectively staging up to two on/off boilers or a single two-stage boiler. Utilizing an NTC thermistor 10k ohm sensor, the 257 maintains precise tank setpoint temperatures, ensuring quick recovery times and consistent system performance even under heavy loads.
For the service contractor, the unit features equal runtime rotation to balance wear across the plant and detailed cumulative boiler run time hours logging for preventative maintenance. Technicians can toggle between Proportional (P) or PID staging modes via the three-button digital interface to fine-tune the staging logic and stage mode delay. The Tekmar 257 is housed in a durable NEMA 1 PVC enclosure and is compatible with standard 24V (ac) power supplies, making it a reliable drop-in solution for dedicated DHW volume water heating systems.
Key Benefits for the Contractor:- Enhanced System Longevity: The equal runtime rotation prevents excessive cycles on a lead boiler, extending the life of the entire heating plant.
- Flexible Staging Logic: Choose between PID control for tight temperature response or manual proportional staging to match specific facility requirements.
- Operational Visibility: Monitor the cumulative boiler run time through the LCD to simplify reporting and troubleshooting.
- Universal Compatibility: Operates at 24Vac and manages relays rated for 240V, allowing integration with a wide variety of commercial boiler types.
How do I handle an 'OPN' error code on the display?
An 'OPN' message indicates an open electrical circuit on the sensor input. Verify the 10k ohm sensor wiring at the terminals and test the thermistor for proper resistance based on the current tank temperature.
Can this control manage more than two stages?
The Tekmar 257 is specifically designed as a two stage boiler control. For systems requiring additional staging or outdoor reset functionality, consider a larger multi-staging controller from the Tekmar line.
What is the difference between PID and Proportional staging on this unit?
PID mode uses advanced algorithms to minimize temperature fluctuations around the setpoint, while Proportional mode relies on fixed differentials for traditional multi-boiler staging settings.
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 Tekmar Controls 257 Control is a purpose-built 24Vac domestic hot water two stage boiler control designed for high-demand applications such as hotels, laundromats, and multi-family residential complexes. This sophisticated microprocessor control provides high-accuracy domestic hot water temperature regulation by effectively staging up to two on/off boilers or a single two-stage boiler. Utilizing an NTC thermistor 10k ohm sensor, the 257 maintains precise tank setpoint temperatures, ensuring quick recovery times and consistent system performance even under heavy loads.
For the service contractor, the unit features equal runtime rotation to balance wear across the plant and detailed cumulative boiler run time hours logging for preventative maintenance. Technicians can toggle between Proportional (P) or PID staging modes via the three-button digital interface to fine-tune the staging logic and stage mode delay. The Tekmar 257 is housed in a durable NEMA 1 PVC enclosure and is compatible with standard 24V (ac) power supplies, making it a reliable drop-in solution for dedicated DHW volume water heating systems.
Key Benefits for the Contractor:- Enhanced System Longevity: The equal runtime rotation prevents excessive cycles on a lead boiler, extending the life of the entire heating plant.
- Flexible Staging Logic: Choose between PID control for tight temperature response or manual proportional staging to match specific facility requirements.
- Operational Visibility: Monitor the cumulative boiler run time through the LCD to simplify reporting and troubleshooting.
- Universal Compatibility: Operates at 24Vac and manages relays rated for 240V, allowing integration with a wide variety of commercial boiler types.
How do I handle an 'OPN' error code on the display?
An 'OPN' message indicates an open electrical circuit on the sensor input. Verify the 10k ohm sensor wiring at the terminals and test the thermistor for proper resistance based on the current tank temperature.
Can this control manage more than two stages?
The Tekmar 257 is specifically designed as a two stage boiler control. For systems requiring additional staging or outdoor reset functionality, consider a larger multi-staging controller from the Tekmar line.
What is the difference between PID and Proportional staging on this unit?
PID mode uses advanced algorithms to minimize temperature fluctuations around the setpoint, while Proportional mode relies on fixed differentials for traditional multi-boiler staging settings.
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.
