VIA-DU-20, nVent RAYCHEM controller for ramp heating systems

VIA-DU-20, nVent RAYCHEM electronic controller for ramp heating systems

VIA-DU-20, nVent RAYCHEM controller for ramp heating systems


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Product details

nVent RAYCHEM VIA-DU-20 electronic controller provides control of ramp heating systems in car parks, driveways, staircases and other excess inclines. The controller energises the heating circuits when the ambient temperature falls below a set point and moisture is detected.  The VIA-DU-20 saves energy when compared to other systems regulated by ambient temperature only and also may identify a the risk of potential freezing rain.

RAYCHEM VIA-DU-20: Features & Benefits

  • Precise control: ambient and moisture sensing 
  • Adjustable range: 1°C to +6°C (ambient sensing) and 1  to 10 (moisture sensitivity)
  • Display: point matrix, 2 x 16 places
  • Communication: BMS connection and alarm contacts
  • Voltage: 230 VAC, ±10%, 50/60 Hz
  • Switching:  Imax 4(1) A, 250 VAC, SPST, volt free
  • Reliable: nVent RAYCHEM 6 six year available


  • TECHNICAL DETAILS
    SPECIFICATIONS
    ApplicationRamp heating

    for nVent RAYCHEM EM2-CM, EM2-MI, EM2-R, EM2-XR and EM4-CW  heating cables
    Area of UseOrdinary area
    AssemblyDIN rail
    Exposure temperature range0°C to +50°C
    Electrical
    Supply voltage230 VAC, ±10%, 50/60 Hz
    Power consumption14 VA max
    Main relay (heating) Imax 4(1) A, 250 VAC, SPST, volt free
    Alarm relay Imax 2(1) A, 250 VAC, SPDT, volt free
    Switching accuracy± 1 K
    Terminals0.5 mm² to 2.5 mm²
    Display and programming
    Screen typePoint Matrix, 2 x 16 places
    Control buttons
    1. TEST
    2. MENU
    3. LANGUAGE selection (GB, D, F, I , FIN, H, PL)
    4. Increase ADVANCE selection value
    5. Decrease REDUCE selection value
    6. CONFIRM
    Temperature set points1°C  to 6°C
    Base temperatureOFF, -15°C to -1°C 
    Freezing rain warningLocal detection, weather service, OFF
    Moisture sensitivity range1 (max) to 10 (min)
    Post heating time30 to 120 minute, selectable
    OverrulingOFF, ON, by BMS
    Parameters saved in unit memory in the event of power supply interruption
    Enclosure
    MaterialNoryl
    Ingress protectionIP20 / class II (requirements of class II only fulfilled after proper mounting)
    Mounting optionDIN rail
    Sensor - Moisture (VIA-DU-S20)
    TypePTC  5 wire
    Sensor70 mm x 35 mm flat cable
    Cable length15 m (standard); extendable up to 150 m using  5 x 1.5 mm² cable
    Supply voltage8 VDC via control unit
    Exposure temperature range-30°C  to +80°C
    Sensor - Ambient (VIA-DU-A10)
    TypePTC
    Enclsoure dimensions52 mm wide
    50 mm high
    35 mm depth
    Ingress protectionIP54
    Terminals1.5 mm² to 2.5 mm²
    Cable2 x 1.5 mm², max length 100 m (not included)
    Exposure temperature range-30°C  to +80°C
    FixingWall mountable
  • APPROVALS
    APPROVALS
    CE certified


  • DIMENSIONS
    DIMENSIONS AND WEIGHT
    Width160 mm
    Height90 mm
    Depth58 mm
    Weight0.75 kg

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