DTFI 9021

Cooling unit 320 W
  • robust: steel cover, easily paintable
  • compact design, ideal for flat control cabinets, control consoles and operating units
  • diagnostic message via operating display
  • integrated fault and door contact
  • optionally available with integrated condensate evaporation system
  • simple and fast mounting without drilling
  • small structural height for integration in machine control cabinets
  • cut-out compatible with 3rd and 4th Generation Filterfans, installation size 6

partially recessed mounting

protection system

cut-out compatible

Technical data

DataDTFI 9021
Rated voltage ±10 %AC 50/60 HzAC 60 Hz
400 V 2~¹230 V115 V
Cooling performance
according to EN 14511
A35/A35230 / 290 W320 / 340 W320 W
A35/A50220 / 280 W300 / 330 W250 W
Ambient temperature+15 … +45 °C / +59 … +113 °F
Degrees of protection
according to EN 60529
IP 54towards the surroundings
if used as intended by the manufacturer

1 suitable for various supply voltages (see specific technical datasheet).

Further technical details, performance curves and dimensions can be found in the download section on this page under product sheet.

Further technical details and dimensions can be found in the download section on this page under product sheet.


Description Type Size
Conformity DTx 9xx1 pdf 55 KB Download
Conformity_UKCA_085507005_Rev01_Mar24_DTI_DTS9xx1.pdf pdf 37 KB Download
Manual DTFI/DTI 9021 pdf 1.7 MB Download
Supplem. DTI/DTFI 9021 230V pdf 380 KB Download
Suppl. DTI/DTFI 9021 115V 60Hz pdf 430 KB Download
Supplement DTFI 9021 400V 2~SC pdf 440 KB Download
Description Language Type Size Download

Product sheet

  • English
pdf 550 KB Download

3D-model (STEP)

  • English
zip 6.2 MB Download


  • English
pdf 51 KB Download

UL recognized certificate

  • English
pdf 530 KB Download

EAC certificate

  • English
pdf 1.6 MB Download

Further software tools for digital product integration into your planning and documentation (such as Eplan macros) can be found at MyPfannenberg.

Ordering details

Ordering detailsDTFI 9021
TypeRated voltage400 V AC230 V AC115 V AC
Standard ControllerArticle number132931490551329314105513293144055

Article numbers for other types on request.

Product Benefits

  1. 1

    Standard cooling unit

    with an attractive price-performance ratio for safe cooling of industrial switch cabinets.

  2. 2


    with large fin spacing enables very long maintenance intervals even without additional Nano coating.

  3. 3

    Large distance between intake and exhaust vents

    for safe air circulation and elimination of hot spots.

  4. 4

    Mounting auxiliary edge

    allows the cooling unit to stand freely when unpacking and before installing, and prevents the unit from slipping out uncontrollably during installation into the mounting cut-out by 1 person.

  5. 5

    Integrated door and failure contact

    for automatic stand-by mode, if the door is open and opening of a relay as a centralised fault indication, in the event of no voltage supply, temperature too high or too low, temperature sensor is defect or short circuit in the air circuit for example.

  6. 6

    Highest variability

    due to cut-out compatibility for 5 performance classes and to Pfannenberg air/water and air/air heat exchangers.

  7. 7

    Integrated sealing

    finished and perfectly mounted.