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BCA BUS – Preheating electric coil

  • Simple to install : fitted like a ductwork accessory.
  • Preheating to meet exact needs of HRV unit.
  • Circular electric coil used to preheat incoming air and controlled by the HRV unit (Dee Fly Cube or Dee Fly Modulo) via a BUS port.
  • Jointed galvanised steel shell.
  • Tube resistance connected to an external connection box.
  • Stainless steel AISI 321L heating pin.
  • IP40 protection rating.
  • Manual and automatic temperature limiter (60°C / 120°C).
  • Assembly on circular ductwork, upstream of the HRV unit.
  • Suitable for indoor use only.
  • Operating in ON/OFF mode (OFF = 0W, ON = 1500W).
  • Controlled by the HRV unit according to the following operating rules :
    • The BCA BUS is activated (P=1500W) when the temperature of incoming air ≤ 0°C.
    • The BCA BUS stops when the temperature of incoming air > 0°C.
  • Frost protection principle : to prevent fros on the HRV unit, 2 actions are taken in parallel :
    • as indicated below, the BCA BUS is activated from below 0°C to heat the incoming air.
    • below -12°C, the maximum airflow supplied by the HRV unit is lowered so that the air can be heated sufficiently.
    • when the incoming air reaches the severe frost limit (-40°C for Dee Fly Modulo and -45°C for Dee Fly Cube), the air inflow is stopped (zero airflow). The HRV unit then operates simply as an Exhaust unit.
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