VAV dual duct terminal units for dual duct systems with variable volume flows in buildings with demanding acoustic requirements
Optional equipment and accessories
Application
Special features
Variants
Parts and characteristics
Attachments
Accessories
Useful additions
Construction features
Materials and surfaces
TVM-S-D, TVM-D
Mineral wool
Functional description
The VAV terminal unit is fitted with two differential pressure sensors for measuring the volume flow rates, one in the cold air flow and one in the total air flow.
The control components (attachments) include two differential pressure transducers that transform the differential pressure (effective pressure) into an electric signal, two controllers, and two actuators; the control functions can be achieved with a Compact controller or with individual components.
For most applications, the setpoint value comes from a room temperature controller.
The controller compares the actual value with the setpoint value and alters the control signal of the damper actuator if there is a difference between the two values.
The room temperature controller alters the setpoint for the cold air flow rate between 0 and the maximum volume flow rate Vmax.
The warm/total air controller is set to the minimum volume flow rate Vmin and controls the warm air damper blade. As a consequence, a corresponding proportion of warm air is added. As the demand for cooling increases, the warm air damper blade closes such that eventually only cold air flows.
An integral attenuator reduces the noise that is created by the restriction of the airflow.
The airflow velocity at the room end is, due to the larger rectangular cross section, about half the velocity in the circular duct.
Rectangular VAV dual duct terminal units for dual duct systems with variable and constant volume flows, available in 6 nominal sizes.
Connecting spigots for warm and cold air arranged at an angle of 90°. Up to nominal size 200 an angle of 60° is also possible, hence ideal for for the refurbishment of older systems with dual duct units.
High control accuracy (even with upstream bend R = 1D).
Ready-to-commission unit which consists of the mechanical parts and the electronic control components. Each unit contains two averaging differential pressure sensors for volume flow rate measurement, one in the cold air flow and one in the total air flow, two damper blades, and an integral attenuator. Factory-assembled control components complete with wiring and tubing.
Differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
On the fan end, spigot with groove for lip seal, suitable for connecting ducts to EN 1506 or EN 13180.
Room end suitable for the connection of air duct profiles.
Two baffle plates, one fitted after each damper blade for optimum acoustic and aerodynamic performance.
Casing with acoustic and thermal insulation.
Position of the damper blade indicated externally at shaft extension.
Closed blade air leakage to EN 1751, class 4 (nominal sizes 125 and 160, class 3).
Casing air leakage to EN 1751, class B.
Complies with VDI 2083, clean room class 3, and US standard 209E, class 100. Hygiene complies with VDI 6022, DIN 1946, part 4, as well as EN 13779 and VDI 3803.
Special features
Materials and surfaces
TVM-S-D, TVM-D
Mineral wool
Technical data
Attachments
Variable volume flow control with electronic Compact controller to switch an external control signal and an actual value signal for integration into the central BMS.
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Contacto
Estamos aquí para atenderles
Por favor mande su solicitud
Tel.: +34 976 50 02 50 | Fax: +34 976 50 09 04
Contacto
Gracias por su mensaje.
Su mensaje ha sido enviado correctamente, en breve será atendido.
En seguida nos pondremos en contacto con Vd.
Para información general sobre productos o servicios, por favor llamar al:
Tel.: +34 976 50 02 50 | Fax: +34 976 50 09 04
