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New Post 5/12/2008 4:51 PM
  Arlos
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transducer 
I installed a customer owner heater (3 element) two weeks ago and it failed to power up and Friday replaced it with a reconditioned unit that arrived from your end. The transducer did not spin and we did everything including back flushing to get it to move. I removed the transducer from the one we just removed and noticed growth of iron like crystals on the turbine. Is this a magnetic media used in manufacturing the turbine blade? If so, isn't this prone to iron inclusion? I'm hesitant to even call tomorrow for a replacement if this is an on going issue. There is less than .03 ppm total iron in the municipal source and th house piping is copper with a new PVC line from the house to meter. So is it possible, iron is indeed plating out and its deposits are causing false signals through the hall effect switch??
 
New Post 5/13/2008 8:05 AM
  brucerowe
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RE: transducer 
We no longer recommend backflushing high KW electric heaters because that can damage the transducer. We have not seen any iron or crystals on the transducer impeller but it is possible because the impeller is magnetic. Manufacturing residue seems unlikely. We have not noted any connection between non-functioning transducers and iron content in the water. We have seen many heaters with transducers clogged or slowed down with pipe dope or plumbers paste (manual states not to use these materials).
 
New Post 5/13/2008 8:30 AM
  Arlos
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RE: transducer 
Your tech recommended back flushing BTW. If I can get a decent shot of the impeller, I'll send the photo to Brad Long and he can forward this. There is indeed a very definite organization to the structure of growing iron inclusion.
 
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