Dual EC

The energy saver

INDIVIDUAL
INNOVATIVE
ENERGY-SAVING



  • Applications

    Dual EC is the energy-saving model for applications in shops and retail. Wherever there is only a limited supply of heating energy available which must be used efficiently, the Dual EC has a special way of fulfilling all the requirements on a modern door air curtain unit. Installation-ready model available in 3 installation variants. Free-hanging, installed flush with the ceiling as a cassette unit or equipped with intake chamber and sliding supports for installation in a suspended ceiling.

  • Special design

    Equipped with 2 rows of fans, inside, 2 airflows are created – an outer (unheated) and an inner (heated) airflow. The airflows are routed separately all the way through to the discharge. Here, the unheated outer airflow has a stabilising effect on the overall flow behaviour, whereby a higher throw distance is achieved and the shielding performance optimised. The saving in heating energy is around 40% compared with conventional door air curtains.

  • The housing

    Self-supporting sheet steel housing. Screws are not visible. High-quality powder coating, RAL 9016 as standard (traffic white). Other colours are available.
    Inspection panel hidden behind the intake grille. Double, aerodynamically-optimised aluminium discharge fins (naturally anodised), flush with the underside of the unit and adjustable in 5 stages. Perforated metal intake grille (same colour as the unit) with micro grille behind it as an intake filter.

  • Heating media

    A choice of heat exchangers for different heating media:
    LPHW – for low temperature LPHW 60/40, other temperatures available on request.
    DX – soldered under nitrogen – for operation with heat pumps (only heating modus possible). High-quality heat exchanger made from copper tubes, with pressed-on, extra-strong aluminium fins for optimum heat transfer.

  • Maintenance

    Easy to clean (micro grille) without opening the unit by simply vacuuming the intake grille. Discreet secured inspection panel hidden on the lower side of the unit (hinges on one side) – easy to open.

  • EC fans

    The efficiency of the EC fans used by TEKADOOR is > 90% under partial load operation. This is 30–35% higher than for conventional AC fans. This does not just increase the efficiency, but also reduces the operating costs. The individually-driven EC fans with integrated motor protection can intake air in both directions. They have vibration-free bearings and are controlled using a PWM signal (pulse width modulation) – and with 0-10 V for the DX. They do not just comply with Directive ErP, but actually exceed this standard.

  • Mounting

    Extremely simple mounting thanks to the rivet nuts (M8) incorporated on the upper side of the unit and optionally-available assembly materials. In the standard version, the unit does not need to be opened for electrical connection. Connection terminals for the voltage supply, as well as the connectors for the control unit and parallel operation can be accessed from the outside.

  • Control

    Electronic TEKADOOR GTC EC control unit, multifunctional with touch display, including an optional ModBus interface
    A GTC 1 EC control unit is used as standard for models with LPHW heating. The units come with 20 m preassembled and shielded data cable. The GTC 1 EC 5-stage control unit includes the ability to switch from manual to automatic and from summer mode to winter mode as standard. A solenoid valve of up to 2.5 A can be connected as an option for the winter mode. The control unit includes a manual to automatic mode switch and a potential-free contact for enabling via any on-site BMS or BEMS. A choice of 5-stage or stepless fan operation is offered as standard. A maximum of 10 units can be connected in parallel.



Advantages at a glance

  • Made in Germany
  • ErP conform / EC fans
  • Reduced heating costs thanks to dual technology
  • Certified by TÜV-Süd
  • Robust, self-supporting sheet steel housing
  • High-quality powder coating
  • Individual colours available (standard RAL 9016)
  • 3 installation types
  • Individual unit lengths up to 2500 mm
  • Easy-maintenance filter cleaning thanks to micro grille
  • Aerodynamically optimised double discharge fins
  • Different heating media possible
Dual EC

Dual EC

Details



Connetions

Connections

Heating connections – flow and return – on top of the unit as standard for easy connection to the on-site heating system. (Internal thread dimensions depend on the model).
Optionally, the connections can also be located at the side.



Connection box (LPHW)

Connection box (LPHW)

Simple electrical connection via connection box (voltage supply 230V/50Hz on the top of the unit); connection can optionally also be located at the side.



Data cable connection / interface

Data cable connection/interface

Simple, standard plug and play connection of the data cable and an optional solenoid valve on the top side of the unit. The connection can be offset on request.

Control:
Input for the data cable to the control unit.

Auxiliary:
Output for parallel operation with other units.



Double discharge fin

Double discharge fin

The shielding performance of the door air curtain unit is optimised by adjusting the discharge fins. The fins can be adjusted in 5 stages. During the heating period, the discharge fins should be tilted outwards by 10 to 15 degrees to prevent cold air coming in from the outside. In contrast, during operation in the summer, the fins are tilted inwards, so that the cooled indoor air cannot escape.

Dual EC

Optional accessories



Thermostatic straightway valve

Thermostatic straightway valve

(Setting range + 20 °C to + 35 °C) limits the discharge temperature
(constant supply air temperature limitation). Also available as a 3-way valve.



Ceiling attachment set

Ceiling attachment set

For problem-free, vibration-free ceiling attachment, consisting of M8 threaded rods, up to 1000 mm length, vibration dampers, turn-buckles and counter nuts.



Door contact solenoid switch

Door contact solenoid switch

In automatic mode switches on the door air curtain in the preselected stages



Frost protection thermostat

Frost protection thermostat

For monitoring LPHW heat exchangers exposed to the risk of frost. As soon as the temperature falls below +7 °C, the fans are switched off and an optional solenoid valve is opened.



Solenoid valve

Solenoid valve

Opens or closes the heating water circuit in the summer/winter setting of the control unit, to close the heating water circuit during summer operation or when the air curtain is not working (normally closed).
Caution: If solenoid valves or thermo-electric shut-off valves are used, it is expressly recommended to install a frost protection thermostat (automatically actuated) and a strainer.



Raumthermostat

Electronic control valve

Electronic valve with 0-10V impulse and blow-out temperature sensor completely installed and wired. In combination with the GTC 2 control, a preselected blow-out temperature is kept constant.



Thermo-electric shut-off valve

Thermo-electric shut-off valve

230 V / 50 Hz, normally closed.
On-site installation in the heating flow. Actuated by the summer/winter circuit. Summer function – closed. Winter function – open.

Dual EC

Technical Data



Dual EC M


Free hanging
Cassette
Suspended ceiling

PDF

Dual EC L


Free hanging
Cassette
Suspended ceiling

PDF

Dual-DX M/L EC


Free hanging
Cassette
Suspended ceiling
only heating mode possible

PDF

Dual EC

Installation Variants



Free-hanging


Connection-ready free-hanging door air curtain unit for visible installation directly above the door.
Ambient air intake is at the front, on the room side.

OPEN

Cassette


Connection-ready door air curtain unit with intake on the underside and surrounding frame for installation flush with the ceiling.
Ambient air intake is from the underside, on the room side. Freely accessible inspection panel on the underside of the unit.

PDF

Suspended ceiling unit


Connection-ready door air curtain unit with intake chamber on the underside and intake and discharge sliding supports for installation in a suspended ceiling. Only the intake and discharge grilles are visible from below. Ambient air intake is from the underside, on the room side.
CAUTION: The inspection panel is on the underside of the unit. Therefore, it is essential that the suspended ceiling in which the unit is installed can be completely disassembled in the region between the intake grille and the discharge element.

PDF