Siemens BACnet Heat Pump Controller - Multi-Stage Owner’s Manual

The mixed air loop controls only the mixed air portion of the application.

The mixed air damper motor can be either a spring return or floating control damper motor.

•For a spring return damper, the mixed air loop will control the damper through its 0 to 10 volt analog output and the digital outputs will be spare.

•For a floating control damper the mixed air loop will control the damper through DO 1 and DO 2, and the analog output will be a spare.

CAUTION:

This application does not have built in low temperature detection for the mixed air dampers. The low temperature detection is handled differently depending on what type of damper is used (spring return or floating control).

Stand-alone low temperature detection is not possible with floating control dampers. A program can be written in the field panel to close the damper when a low temperature situation occurs. Contact your local Siemens Building Technologies representative for more information.

Day Mode – When heating is required and the fan is on, the damper is set to minimum position. If the fan is off, the damper is closed.

When cooling is required the damper will be modulated by the mixed air temperature control loop. Damper position will not be set below minimum position to make sure that the ventilation requirements are being met.

Night Mode – The damper is closed (0%) during night mode when cooling is not required and/or mixed air control is not used at night.

Mixed Air Control - When cooling is required the damper will be modulated by the mixed air temperature control loop.

If the cooling loop is between the limits for free cooling and all other conditions have been met for enabling the mixed air loop, control depends on the following:

•If the cooling loop was previously higher than free cooling, the mixed air loop will remain enabled.

•If the cooling loop was previously lower than free cooling, the mixed air loop will remain disabled.

NOTE: This can happen in day or night mode.

Calibration

Floating Control Damper – The damper is briefly commanded closed to get an accurate damper position during calibration.

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Siemens Building Technologies, Inc.

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Siemens 125-699 owner manual Calibration
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125-699 specifications

The Siemens 125-699 is a state-of-the-art industrial control product that showcases Siemens’ commitment to innovation and quality in automation technology. This device is specifically designed for various industrial applications, providing exceptional performance and reliability.

One of the main features of the Siemens 125-699 is its robust processing capabilities. Equipped with a high-speed processor, it can handle complex control tasks efficiently, ensuring smooth operation even under demanding conditions. This makes it suitable for a wide range of applications, from manufacturing to process automation.

The device supports multiple communication protocols, which enhances its versatility. It is compatible with popular industrial communication standards such as Profinet, Profibus, and Ethernet/IP. This flexibility allows for seamless integration into existing systems and facilitates communication between various devices on the network, making it an ideal solution for modern interconnected factories.

In terms of user interface, the Siemens 125-699 offers an intuitive design with a user-friendly programming environment. The platform supports advanced programming languages, including Ladder Logic and Structured Text, enabling engineers to develop and modify control algorithms with ease. This capability not only improves efficiency but also reduces the time needed for troubleshooting and maintenance.

Another characteristic that sets the Siemens 125-699 apart is its rugged construction. Designed for harsh industrial environments, it features a durable housing that protects against dust, moisture, and extreme temperatures. This robustness ensures longevity and reliability, even in challenging conditions, which is crucial for minimizing downtime and promoting continuous operation.

Additionally, the Siemens 125-699 incorporates advanced diagnostic tools. These tools enable real-time monitoring of the system's performance, allowing operators to detect and address potential issues before they escalate. This proactive approach to maintenance is vital in enhancing productivity and ensuring the smooth operation of industrial processes.

In conclusion, the Siemens 125-699 is a comprehensive solution for industrial automation needs. Its combination of high processing power, versatile communication options, user-friendly interface, rugged design, and advanced diagnostic capabilities makes it a leading choice for companies looking to enhance their automation systems and improve operational efficiency. With Siemens' reputation for quality and innovation, the 125-699 stands as a testament to the company's dedication to advancing industrial technology.
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