Smart climate control - Open office plan | Lindinvent
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OPEN OFFICE PLAN HIGH FLEXIBILITY

Equipment in an open floor plan for controlling ventilation, cooling, heating and lighting via the active device TTC.

TTC is used to best utilize the office layout both in the short and long term. The active device is used to achieve full potential when it comes to maintaining an attractive indoor climate.

High flexibility
Active diffuser TTC has sensors built-in and in many cases there are no need for added installations. This gives extremely high flexibility and a simplified handling during renovation projects as walls may have to be built or moved.

With TTC, the open office landscape is prepared for a flexible transformation where the module dimensions of 2400 mm at the facade can be converted into cell offices. The inside of the building is often left with the open floor plan intact.

Open plan office with supply air via the active supply air diffuser TTC.

TTC regulates the temperature and airflow by raising or lowering the height between the lamellas in the diffuser section. Pressure and flow sensors together with the encoder on the engine ensure accurate flow control. The flow is set to be demand-driven on the basis of 3 different levels: absence, presence and maximum flow. The built-in presence detector controls economy and comfort mode after adjustable time delays.

Extract air
The smart damper DCV-BL is used for extract air balancing. Air flows are communicated and shared with other active units via the communication loop. A compensation/offset for fixed airflows can be set.

Heating
Valve actuators (SV) are connected to the nearest active supply air device. This facilitates a future division of the room. TTC units can be programmed to form a temperature zone.

Additional heat- or cooling steps
Additional heating or cooling can be connected via connection box CBX.

Extra sensors
Carbon dioxide or air quality sensors can be connected. Signals from sensors are used to control adjustable P-bands.

Lighting
TTC can flexibly control the conference room lighting via presence detectors or via signals from other control units. Via relay box CBR, push buttons and 230 VAC for lighting can be connected and controlled. The lighting is switched on and off either via a signal from the presence sensor or from connected push buttons. Time for ignition from detected presence (an operating mode) can be set, as well as the time for switching off the lighting after the last registered presence. If a more advanced lighting solution is desired, with scenes etc., lighting control SBD can be used for a DALI solution.

Cable
The cable in use for linking units to a communication loop (CAN bus) is a PVC-free shielded 4-conductor combined supply and communication cable. Relay boxes and sensors etc are normally connected via connection box CBX using the same cable specification. The 4-conductors are used for power supply and signals when applicable.

Cable lengths
The CAN bus cable can be pulled long distances with respect to communication, but, for power supply to be at acceptable levels, voltage drop must be considered. See the electrical design guide.

Power supply and transformers
In a normal situation, one 230/24VAC transformer is installed per 12 to 15 diffusers/nodes on the CAN-bus section. This is a rule of thumb that applies at short distances between products. See the electricity design guide for details.

Pre-assembled smart dampers
Circular designs of the smart damper DCV-BL (as well as other circular smart dampers) are supplied with the regulator and the damper motor pre-mounted on the circular damper with measuring flange. The unit only requires connection of the controller to the combined feed and communication loop.

As long as the cooling capacity is set to a maximum of 80 W/m2, there is no problem with drafts in the occupied zone. The recommended distance to avoid draft between the centers of two diffusers is approximately 3000 mm.

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