Indoor environmental control system.
The occupied spaces will be naturally ventilated for the purpose of maintaining acceptable indoor air quality, thermal comfort, and energy efficiency, to the following current design guidance and regulations:
This is achieved by monitoring internal and external environmental conditions and applying adaptive control strategies to automate façade, windows, louvres, roof vents, roof terminals, extract fans etc in conjunction with internal heating and cooling products.
The system comprises of distributed independent Room Controllers, each incorporating their own inbuilt pre-programmed strategies, sensors and intuitive user interfaces within a single wall mounted unit for each room space, reducing cabling and installation costs plus providing system adjustment and operation from within each room. Common shared signals, such as weather and maintenance, are networked. System performance must be recorded continually post-occupancy to prove compliance and provide feedback to the client and design team.
|Uniclass 2015||Mechanical services control panels (Pr_75_50_18_51)|
NV LogiQ Control System
|Standard product features|
The Room Controller is the key user interface and sensor module at the heart of the system within each room, providing simple intuitive use of the natural ventilation system. It is wall mounted in a location suitable for the inbuilt sensors.
- User interface:
Inbuilt CO2, temperature and humidity sensors.
- AOV modulation:
5% incremental positioning to provide precise control and effective trickle ventilation.
The PSU is the power and interface module for the Room Controller but can also be used as natural ventilation AOV PSU or BMS interface unit. It contains multiple connection terminals and commissioning features, and can operate a number of AOV devices.
Outdoor Air Temperature (OAT) Sensor:
The OAT sensor enables the Room Controller to offer accurate summertime passive cooling (night purging) and effective thermal comfort and energy efficiency in wintertime.
Combined Rain and High Wind Speed Detector:
The sensor allows the control system to close or reduce the opening of the AOVs to prevent weather ingress or damage as well as nuisance drafts. The system however can still provide reduced opening ventilation options during activated periods.
Consult manufacturer's literature for full details of M&E capabilities and requirements for system.
Modes of operation:
- Indoor Air Quality (IAQ):
The Room Controller will maintain IAQ within acceptable levels as the stated design guides and regulations, using CO2 as the measurement criteria. It has the following features for IAQ performance:
- Thermal Comfort (TC):
The Room Controller will maintain TC within acceptable levels as the stated design guides and regulations using temperature (°C) as the measurement criteria. It has the following features for TC performance:
- Energy Efficiency (EE):
The IAQ and TC control strategies will maximise energy efficiencies. It has the following features for EE performance:
Data logging and post occupancy evaluation:
The Room Controller records all sensor readings and the resultant AOV position demand, for post installation performance monitoring. This information can be downloaded by the client via the data port using a data stick which will be returned to the system supplier, who shall in turn provide feedback on the system performance relative to the acceptable setpoints within the design guides and regulations. This method of cost effective post occupancy evaluation (POE) provides essential feedback to the client and consultant of the system performance and allows optimum setpoint changes.