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KRFI-SN EC • Roof exhaust units

  • Roof fans EC motor
  • Vertical discharge
  • Motor out of air stream
  • Centrifugal

Roof fan with vertical discharge and acoustic insulation (40 mm)

Application

  • These fans are used for ventilation of industrial kitchens and for air extraction up to 120°C

Composition

  • Casing made out of AIMg3 aluminium that is resistant to seawater with protection grille.
  • Turbine with backward curved impeller with blades that are made of galvanised steel plate up to type 280 and of aluminium for all other types, balanced G6.3 according to DIN ISO 1940.
  • External rotor motor with speed control and overheat protection.
  • Voltage: 230 Vac, 1 ph and 400 Vac 3 ph.
  • Swivel motor compartment.
  • Security switch
  • Equipped with integrated drain pan and evacuation.
  • Sound power levels measured in an acoustic chamber according to DIN 45635 – part 2
  • Sound emissions measured according to Din 45635, part 38:

1. Lwa,2 breakout sound level

2. Lwa,2 inlet sound level

3. Lwa,2 outlet sound level

Accessories

  • Acoustically insulated roof socket, type RAC-I
  • Roof socket, type RC-I
  • Backdraught shutter, type RAS
  • Matching flange, type RIF
  • Flexible connector, type RFC
  • Transformer controller with 5 steps, type BTRNTK
  • Frequency converter 3x400V in / 3x400V out, type FIS-44

Order example

  • KRFI-SN 400 E4 30

KRFI-SN = Type of fan

400 = Size

E = 1x230V

4 = Number of poles

30 = Version

Air performance data

 Q [m³/h]
 50Pa100Pa150Pa200Pa250Pa300Pa400Pa500Pa600Pa700Pa
KRFI-SN 225 EC 302326229022492202214920911976188818071702
KRFI-SN 250 EC 302640259125412494244924072323222420971941
KRFI-SN 280 EC 303168309730222948287928132675251823402117
KRFI-SN 315 EC 304023397139163858379937443637352733973249
KRFI-SN 355 EC 305448532451795034490648024630444942394008
KRFI-SN 400 EC 305561546253485222509449684716442540163593
KRFI-SN 450 EC 307076687366486416619059775580411745733806

Selection curves

Selection curves

Technical data

 U [V]P [W]I [A]SCTŋt [%]tm [°C]tu [°C]to [°C)n [rpm]Lwa [dB(A)]
 Lwa 5Lwa 6Lwa 2
KRFI-SN 225 EC 301 x 2306623.1MTP010/MSS-D52.412040-2039988684-
KRFI-SN 250 EC 301 x 2307703.6MTP010-MSS-D49.912040-2036408987-
KRFI-SN 280 EC 301 x 2307963.7MTP010/MSS-D54.512040-2030008786-
KRFI-SN 315 EC 301 x 23013299.6MTP010/MSS-D53.512050-2031009189-
KRFI-SN 355 EC 301 x 230141810.1MTP010/MSS-D5912050-2025508886-
KRFI-SN 400 EC 301 x 23011968.8MTP010/MSS-D56.612050-2020008687-
KRFI-SN 450 EC 301 x 23012408.9MTP010/MSS-D59.912050-2016408683-

  • SCT = Transformer controller
  • ŋt = Maximum total efficiency
  • tm = Maximum air temperature
  • tu = Maximum ambient temperature
  • to = Minimum operating temperature
  • Lwa 2 = Casing sound power level
  • Lwa 5 = Sound power level @inlet
  • Lwa 6 = Sound power level @outlet
  • The sound power levels are measured according to DIN 45635 part 2 & 38

Dimensions

 A [mm]B [mm]C [mm]D [mm]E [mm]F [mm][kg]
KRFI-SN 225 EC 30534553482Ø213 - (6x) M6x1524533528
KRFI-SN 250 EC 30534553482Ø213 - (6x) M6x1524533528.5
KRFI-SN 280 EC 30651655512Ø286 - (6x) M6x1533043536.7
KRFI-SN 315 EC 30651655512Ø286 - (6x) M6x1533043548.6
KRFI-SN 355 EC 30804-565Ø438 - (6x) M6x1545059560.9
KRFI-SN 400 EC 30804-565Ø438 - (6x) M6x1545059562.8
KRFI-SN 450 EC 30984-737Ø438 - (6x) M6x15535668103.4
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