Capacitor for EBM-Papst Fan D2E097-CB11-32

Recently I has a customer with Centrifugal Blower Fan D2E097-CB11-32 from EBM-Papst (Digi-Key P/N 381-2507-ND) that is not operating properly when they get the new fan. When talking with him about the set-up and operation we realized that he did not have the required 5uF run capacitor installed this was causing his fan to run sluggishly and move the desired air.

Here is Connection Diagram from the operating instructions.

The manufacturer recommended capacitor is 02162-4-7320 (Digi-Key P/N 381-2624-ND)

All of the fans in the D2E097 will require a motor run capacitor. The suggested capacitance varies per motor.

D2E097 Part Numbers

D2E097-BI56-02 (DK P/N 381-2636-ND) 2uF 400V
D2E097-BI56-A4 (DK P/N 381-2635-ND) 2uF 400V
D2E097-CB11-32 (DK P/N 381-2507-ND ) 5uF 400V
D2E048-CB01-48 (DK P/N 381-2633-ND) 1.5uF 400V
D2E097-CB01-02 (DK P/N D2E097-CB01-02-ND ) 1.5uF 400V
D2E097-CB01-12 (DK P/N D2E097-CB01-12-ND ) 1.5uF 400V
D2E097-BE11-77 (DK P/N D2E097-BE11-77-ND ) 6uF 220V
D2E097-BI56-83 (DK P/N D2E097-BI56-83-ND) 2uF 400V
D2E097-BE01-65 (DK P/N D2E097-BE01-65-ND ) 2uF 400V
D2E097-CB11-26 (DK P/N D2E097-CB11-26-ND ) 5uF 400V

Here is a useful list of the different AC capacitor options Capacitors for AC - ebm-papst | Digi-Key (digikey.com)

Hi,

I have recently bought a similar fan from ebm-papst, a D2E120-aa01-04. It specifies the same wiring scheme as shown in this topic.

I have wired the fan with the suggest 2uF/400V capacitor and the fan runs fine, if not too fast for our application.

I’m looking for a simple way to reduce the rpm of this fan. The link with suggested capacitors mentions that all fans with a PSC motor can be made multi-speed by adding extra capacitors. That would be our preferred solution, we do not need the flexibility of a VFD or variac.

I’m looking for some guidance on:

  • Is the motor in the D2E120-AA01-04 of the PSC type and can it’s RPM be reliably reduced with extra capacitors?
  • How would the additional capacitors need to be wired?
  • If only a single, lower speed would be required, can we simple replace the existing 2uF capacitor with a smaller one, or do we absolutely need to add additional capacitors next to the existing 2uF one?
  • For this fan-type, any suggestions what amount of capacitance would reduce speed to say 2/3 or 1/2?
  • Are there other, suitable external switches that we could use to get 2, or 3, or 4 different speeds on this fan?

Any help would be greatly appreciated!

Best regards,
Rick