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Siemens 125-1957 owner manual Morning Warm-up/Cool-down, ON/OFF Coil Valve Control, Electric Heat

Models: 125-1957

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APOGEE Unit Vent Controller⎯0 to 10 V Output Owner’s Manual

Cooling Loop – maintains room temperature setpoint by turning valves on and off and using free cooling (mixed air control) when available.

Auxiliary Loop – modulates the auxiliary loop using the auxiliary setpoint and discharge setpoint (2284).

Mixed Air Loop – modulates the mixed air loop using the mixed air setpoint and mixed air temperature (2283).

DX Loop – modulates the cooling loop using the control setpoint and room temperature (2284).

Morning Warm-up/Cool-down

Morning warm-up or cool-down occurs after the controller switches from night mode to day mode, upon power-up, or if the controller is reset. During morning warm-up or cool-down, the controller provides maximum heating or cooling with the outdoor air damper closed until the temperature of the space reaches setpoint.

ON/OFF Coil Valve Control

When a face-bypass configuration is used, the coils may be turned on and off with two- position valves using DOs.

Electric Heat

If electric heat is used, it is controlled as follows:

HTG OUTPUT

Stage 1

Stage 2

Stage 3

(Point 60)

 

 

 

 

 

 

 

0% to 33%

ON

OFF

OFF

 

 

 

 

34% to 66%

ON

ON

OFF

 

 

 

 

67% to 100%

ON

ON

ON

 

 

 

 

In addition, no stage may turn on or off until the time delay has elapsed. Stage one will always be the first stage to turn on and the last stage to turn off.

Fan Operation

Day Mode – The fan is on all the time.

Night Mode – The fan only operates when required for heating or cooling.

Fail-safe Operation

A low temperature detection thermostat (LTDT) can be used to signal the controller when the temperature drops below the low temperature limit.

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Siemens Building Technologies. Inc.

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Siemens 125-1957 Morning Warm-up/Cool-down, ON/OFF Coil Valve Control, Electric Heat, Fan Operation, Fail-safe Operation
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125-1957 specifications

Siemens 125-1957, a notable creation of the German engineering giant Siemens, is recognized for its innovative design and advanced technology in the realm of electrical engineering. This model is emblematic of the mid-20th century's commitment to optimizing electrical machinery for industrial applications, contributing to enhanced productivity and efficiency.

One of the main features of the Siemens 125-1957 is its robust construction, designed to withstand the demanding environments of industrial settings. The body of the machine is built from high-grade materials, ensuring durability and longevity. It is also designed to minimize vibration and noise during operation, thus enhancing the user experience.

Technologically, the Siemens 125-1957 incorporates advanced electric motor technology, which provides reliable performance across a variety of applications. The motor is designed for high efficiency, allowing it to operate effectively under load while consuming less energy. This efficiency is crucial in industrial applications where operational costs are significant. The motor is also equipped with thermally protected windings, which prevent overheating and extend the service life of the equipment.

The 125-1957 model is characterized by its adaptability in various operational settings. It is compatible with a range of automation systems, making it a versatile choice for factories and production lines. Its design allows for easy integration with existing equipment, minimizing downtime during installation.

Moreover, the Siemens 125-1957 boasts a user-friendly interface, making it accessible for operators with varying levels of expertise. It comes with comprehensive safety features, including circuit protection and emergency stops, ensuring that it meets the strict industrial safety standards.

In summary, the Siemens 125-1957 represents a blend of robust design, advanced motor technology, and user-oriented features. With its energy-efficient performance and adaptability, it stands out as a key asset in industrial electrical engineering, demonstrating Siemens' commitment to innovation and quality in the manufacturing sector. This model continues to be relevant, supporting various industries in their pursuit of efficiency and reliability.