DENCO®-OfficeCool

LECU: Local Environmental Control Unit

The LECU gives the OfficeCool Air Conditioning System an exceptional ability to cope with the changing work space layout requirements. It is an intelligent fan tile, easily positioned anywhere in the floor of any work space.

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    OfficeCool – LECU
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    OfficeCool – LECU
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    OfficeCool – Standard LECU Grille
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    OfficeCool – Standard LECU Grille
Each Zone Unit is connected to up to 20 LECUs, which gives the OfficeCool Air Conditioning System the exceptional ability to cope with changing office layout requirements.
The LECU is an intelligent fan tile, easily positioned anywhere in the raised floor and provides the user with control over their “micro-climate”. Each LECU includes a fan, a modulating damper and intelligent controller and will maintain the locally desired set temperature by re-circulating a varying mixture of air from the room and conditioned air from under the raised floor. The LECU has 3 selectable fan speeds and an adjustable set-point, to meet users requirements. With its own frame it can be used with stringerless raised floors and matches exactly a 600x600 raised floor panel at a weight of 18 Kg.



Relocation of LECU’s can be accomplished in minutes and enables the OfficeCool Air conditioning system to adapt to your changing work space layout.
Adjustment of the LECU operation is available in different forms. At its simplest, adjustment of the set point and fan speed can be done via the Zone Units display or the optional display mounted on the LECU. The Building Management System (BMS), which allows monitoring or adjustment of the set point and fan speed as well as monitoring of the entire system using selectable variables. When the LECU and Zone Units are networked, the Zone Unit can be controlled by the average of the readings on the room sensors of the LECUs within any particular zone.

There are many ways to control the LECU and with it the individual zone: 
  • Display directly on the LECU under the grille
  • Via the Zone Units controller
  • Via a wall mounted controller
  • Via a BMS and ethernet
Each option allows one to select the desired ambient temperature and the fan speed.
Furthermore, a master and slave system can be build up where one bigger zone of many LECUs would be controlled by one controller and would maintain the same temperature.



Modes:
  • Cooling
  • Heating
  • Recirculation
  • Electric Heater
HX_LECU_operation_CoolingMode_2

If the room sensor detects that the local temperature is too warm, it interrogates the underfloor sensor. If the underfloor temperature is below that of the room air, the damper is modulated open to allow cooling to the space. The damper is modulated sufficiently to offset the heat gain to the space.

 
HX_LECU_operation_HeatingMode_2

If the room sensor detects that the local temperature is too cold, it interrogates the underfloor sensor. If the underfloor temperature is above that of the room air, the damper is modulated open to allow heating to the space. The damper is modulated sufficiently to offset the heat loss to the space.

 
HX_LECU_operation_RecirculationMode_2

When the room sensor detects that the local temperature matches the set point, the damper will be closed and the unit will be in recirculation mode. An adjustable bleed damper allows sufficient air from the floor void to provide the fresh air requirements for the space.

 
HX_LECU_operation_ElectricHeaterMode_2

Under exceptional circumstances, if the room sensor detects that the local temperature is too cold and upon interrogation of the underfloor sensor it is determined that there is insufficient heat available, the controller will modulate the damper fully closed and initiate the electric heater battery. The heater will be on until such time that either the under floor temperature increases sufficiently to meet the heating requirement, or the room temperature increases to the set point.

 
Contact Us

DencoHappel GmbH

Südstraße 48
44625 Herne
Germany
+49 2325 468-00
+49 2325 468-222
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  • Quiet operation
  • Relocatable within minutes
  • No ductwork, no piping
  • Individual control
  • EC and AC fans

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