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VFD for fan speed control

VFD for fan speed control

VFD for fan speed control

(OP)
Hi,
We have a purge fan for a gas/gas heater.The current method to control the flow is to use an inlet box vane control. The client has proposed using a VFD instead. Would this mean that we no longer need the Inlet box vane and hence no actuator to operate it?

Thanks

RE: VFD for fan speed control

Most probably. If you do not need the vane to shut off the fan duct when fan is at standstill.
If you need to shut the duct close when fan is off, you will still need the vane.

Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

RE: VFD for fan speed control

And it is sometimes prudent to leave it in place in case you need to revert to it while the VFD is being byoassed for servicing.

"Will work for (the memory of) salami"

RE: VFD for fan speed control

VFDs need servicing?? That's not what the salesman told me. looking around

RE: VFD for fan speed control

dpc
You need to RTFM - it's all there!

Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

RE: VFD for fan speed control

If the combustion air is from a different source the inlet vane may have to stay.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: VFD for fan speed control

Quote (dpc)

VFDs need servicing?? That's not what the salesman told me. :looking around:
What? Believing salesmen again are we? I hear there's a 12 step program for that now called GFA; Gullible Fish Anonymous.

"Will work for (the memory of) salami"

RE: VFD for fan speed control

Hey jraef: Haven't you heard? They removed the word "gullible" from the dictionary!

(My kids tried that one on me...)

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