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  string(803) "[THIS CONTENT IS AUTOMATICALLY TRANSLATED BY GOOGLE TRANSLATE] The Scala is a lively meeting place for artists and cultural workers from all over Switzerland and beyond. Since 2003, the Scala has had its home in the venerable “Ochsen”. The inn was built in 1583 and can therefore look back on 440 years of history. In addition to the actual event location, the project includes a bar and a restaurant.



The historical building structure, the attached restaurant, high visitor numbers and more require optimal ventilation of the rooms. Although the Scala had a ventilation system, the control system was defective.



The aim of the retrofit project was to preserve the historic building and equip it with suitable, efficient and, above all, intelligent ventilation control."
  ["solution"]=>
  string(5099) "[THIS CONTENT IS AUTOMATICALLY TRANSLATED BY GOOGLE TRANSLATE] In this retrofit project, a total of two mini servers take over the intelligent control of the ventilation and heating system (the separation was due to the spatial distance between the heating and ventilation system). The complete automation of the existing system could be achieved with just a few components: The CO2 measurement is carried out via room climate sensors, the actual control is carried out by various Belimo components. The existing frequency converters were integrated into the ventilation control and controlled with 0-10V.

The Scala's event calendar has been linked to Loxone so that the ventilation and heating can automatically carry out preparatory work before an event. The hall is therefore ready for its guests at the right time with the right room climate.



1. Air volume control:

The air volume control is implemented via fan optimizer programming (bad point control). This means that the air volume of the fans, supply air and exhaust air is regulated as required depending on the volume flow controllers or their pumped air volume.

The differential pressure sensors in the 3 ventilation devices can be seen as the actual value. The sum of the active air volumes via the volume flow controller is used as the setpoint. The air volume is calculated in the software.

An exception is the kitchen exhaust air. It was important to ensure that the amount of air in the exhaust air was controlled depending on the volume flow controller in the supply air so that there was always a negative pressure in the kitchen. Here too, the air volume of the volume flow controller in the supply air is used as a setpoint, with a defined shortfall.

Kitchen

The existing rotary switch (0/Auto/S1/S2) in the kitchen was retained. Depending on the position, this regulates the kitchen ventilation. The air volume of the volume flow controller can be individually adjusted for levels 1 and 2.

The fan is controlled according to the flap position.

bistro

The room climate sensor currently has no regulating effect. It currently only provides values. A later implementation for regulation is possible at any time.

room

The room climate sensor records temperature, humidity and air quality. If the air quality is poor, the ventilation is switched on (if it is not already running). The Belimo volume flow controllers are regulated to a setpoint (adjustable). The worse the air quality, the more the volume flow controllers are opened. In addition, the air volume can be increased or decreased manually.

bar

Analogue hall.

Duct exhaust air sensors

Belimo sensors are placed in the exhaust air ducts of the dining room, bistro, bar and in the shared exhaust air of the gallery and hall and measure temperature, humidity and air quality. The air quality of the exhaust air has the same effect as the air quality in the rooms. For example, if the bar's exhaust air duct sensor measures poorer air quality than the bar's room climate sensor, it takes control of the corresponding controller.

Air heater

The air heater pump and air heater valve are located in the attic. There is no bypass. If there is a need for thermal energy, not only is the air heater pump and the air heater valve activated, but a demand message is also sent to the mini server, which switches on the main pump.



2nd circuit network system (KVS)

Energy recovery (heating or cooling) is carried out by the KVS. The temperature sensor serves as frost protection. If it is colder than 2°C (adjustable), the bypass valve is constantly opened to ensure frost protection in the exhaust air.

The pressure switch is used to monitor the system. The pump is controlled via a 0-10V signal, depending on how much volume is available from the two heat recovery valves.

2.1 Icing protection regulation

The dew point determined is the setpoint for the sensor at the outlet of the KVS register in the supply air. As long as the dew point, which is determined in the respective exhaust air via the humidity and temperature, is above 0°C, the exhaust air register flow temperature is kept above 0°C with the help of the bypass valve. If the determined dew point temperature falls below 0°C, the outlet temperature is also maintained at exactly this value by constantly opening the bypass valve.

2.2 Delta-T control

The Belimo Energy Valve maintains a 2-3 K lower temperature in the exhaust air at the respective outlet of the KVS register than in the exhaust air. This ensures optimal heat transfer. The circulation pump is operated at constant pressure. The start sequence in the ERG case is selected depending on the temperature range in the two exhaust air devices.



3. Temperature control

Since these are event rooms and are also equipped with static heating (radiators), a constant supply air temperature control is recommended. This is also ideal for the kitchen."
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    string(803) "[THIS CONTENT IS AUTOMATICALLY TRANSLATED BY GOOGLE TRANSLATE] The Scala is a lively meeting place for artists and cultural workers from all over Switzerland and beyond. Since 2003, the Scala has had its home in the venerable “Ochsen”. The inn was built in 1583 and can therefore look back on 440 years of history. In addition to the actual event location, the project includes a bar and a restaurant.



The historical building structure, the attached restaurant, high visitor numbers and more require optimal ventilation of the rooms. Although the Scala had a ventilation system, the control system was defective.



The aim of the retrofit project was to preserve the historic building and equip it with suitable, efficient and, above all, intelligent ventilation control."
    ["solution"]=>
    string(5099) "[THIS CONTENT IS AUTOMATICALLY TRANSLATED BY GOOGLE TRANSLATE] In this retrofit project, a total of two mini servers take over the intelligent control of the ventilation and heating system (the separation was due to the spatial distance between the heating and ventilation system). The complete automation of the existing system could be achieved with just a few components: The CO2 measurement is carried out via room climate sensors, the actual control is carried out by various Belimo components. The existing frequency converters were integrated into the ventilation control and controlled with 0-10V.

The Scala's event calendar has been linked to Loxone so that the ventilation and heating can automatically carry out preparatory work before an event. The hall is therefore ready for its guests at the right time with the right room climate.



1. Air volume control:

The air volume control is implemented via fan optimizer programming (bad point control). This means that the air volume of the fans, supply air and exhaust air is regulated as required depending on the volume flow controllers or their pumped air volume.

The differential pressure sensors in the 3 ventilation devices can be seen as the actual value. The sum of the active air volumes via the volume flow controller is used as the setpoint. The air volume is calculated in the software.

An exception is the kitchen exhaust air. It was important to ensure that the amount of air in the exhaust air was controlled depending on the volume flow controller in the supply air so that there was always a negative pressure in the kitchen. Here too, the air volume of the volume flow controller in the supply air is used as a setpoint, with a defined shortfall.

Kitchen

The existing rotary switch (0/Auto/S1/S2) in the kitchen was retained. Depending on the position, this regulates the kitchen ventilation. The air volume of the volume flow controller can be individually adjusted for levels 1 and 2.

The fan is controlled according to the flap position.

bistro

The room climate sensor currently has no regulating effect. It currently only provides values. A later implementation for regulation is possible at any time.

room

The room climate sensor records temperature, humidity and air quality. If the air quality is poor, the ventilation is switched on (if it is not already running). The Belimo volume flow controllers are regulated to a setpoint (adjustable). The worse the air quality, the more the volume flow controllers are opened. In addition, the air volume can be increased or decreased manually.

bar

Analogue hall.

Duct exhaust air sensors

Belimo sensors are placed in the exhaust air ducts of the dining room, bistro, bar and in the shared exhaust air of the gallery and hall and measure temperature, humidity and air quality. The air quality of the exhaust air has the same effect as the air quality in the rooms. For example, if the bar's exhaust air duct sensor measures poorer air quality than the bar's room climate sensor, it takes control of the corresponding controller.

Air heater

The air heater pump and air heater valve are located in the attic. There is no bypass. If there is a need for thermal energy, not only is the air heater pump and the air heater valve activated, but a demand message is also sent to the mini server, which switches on the main pump.



2nd circuit network system (KVS)

Energy recovery (heating or cooling) is carried out by the KVS. The temperature sensor serves as frost protection. If it is colder than 2°C (adjustable), the bypass valve is constantly opened to ensure frost protection in the exhaust air.

The pressure switch is used to monitor the system. The pump is controlled via a 0-10V signal, depending on how much volume is available from the two heat recovery valves.

2.1 Icing protection regulation

The dew point determined is the setpoint for the sensor at the outlet of the KVS register in the supply air. As long as the dew point, which is determined in the respective exhaust air via the humidity and temperature, is above 0°C, the exhaust air register flow temperature is kept above 0°C with the help of the bypass valve. If the determined dew point temperature falls below 0°C, the outlet temperature is also maintained at exactly this value by constantly opening the bypass valve.

2.2 Delta-T control

The Belimo Energy Valve maintains a 2-3 K lower temperature in the exhaust air at the respective outlet of the KVS register than in the exhaust air. This ensures optimal heat transfer. The circulation pump is operated at constant pressure. The start sequence in the ERG case is selected depending on the temperature range in the two exhaust air devices.



3. Temperature control

Since these are event rooms and are also equipped with static heating (radiators), a constant supply air temperature control is recommended. This is also ideal for the kitchen."
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© Scala