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    VENTS NKD A21 V.2 series

    VENTS NKD A21 V.2 series
    VENTS NKD A21 V.2 series
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    Duct heater for supply air post-heating with external control
    Model features
    • For round ducts
    • Ventilation accessories
    Series of products
    VENTS NKD 125-0,6-1 A21 V.2
    VENTS NKD 125-0,6-1 A21 V.2
    VENTS NKD 125-0,8-1 A21 V.2
    VENTS NKD 125-0,8-1 A21 V.2
    VENTS NKD 125-1,2-1 A21 V.2
    VENTS NKD 125-1,2-1 A21 V.2
    • Description
    • Modifications
    • Downloads
    • Designation key
    • Compatibility table
    • Electric heater power selection diagram
    Description
    Description
    APPLICATION  
    • The heater is designed for integration into a ventilation system and joint operation with an air handling unit equipped with a control system used to switch on the heater and control its operation.
    • The heater maintains the supply duct air temperature at a point set by the unit controller.
    DESIGN  
    • The casing, the junction box and the heater cover are made of galvanized steel with the heating elements in stainless steel.
    • The heater casing is additionally heat-insulated with 20 mm non-flammable mineral wool layer.
    • The heaters are equipped with rubber seals for airtight connection to the air ducts.
    • NKD A21 V.2 duct heaters are equipped with a factory-wired power cable and a control cable, and also have a duct temperature sensor that is connected to the ventilation unit.
    • Temperature control is carried out smoothly by the ventilation unit controller due to the PWM signal in cycles of 10 seconds.
    • Load commutation is carried out by the semiconductor device (triac).
    • The heaters are equipped with overheat thermostats:
      ⏵main overheat protection with automatic reset at +50 °C
      ⏵emergency overheat protection with manual reset at +90 °C
    MOUNTING  
    • The heater design ensures its mounting on the round ducts in any position by means of clamps (included in delivery).
    • The air flow direction shall match the direction of the arrow on the heater casing.
    • In case of horizontal mounting the control box must be installed with the cover upwards.
    • Swivel range from the normal position up to max. 90°.
    • Do not install the control box with the cover downwards.
    Modifications
    Downloads
    Downloads
    Designation key
    Designation key
    Compatibility table
    Compatibility table
    Electric heater power selection diagram
    Electric heater power selection diagram
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