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  1. 25th August 2005, 07:19 PM #1
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    Default Grundfos water pump

    Help is desperately needed.

    I have a Grundfos Water pump, 'Ch2-30' I have just replaced the seals and placed it back connecting all the water.

    The problem I have is that the air pressure has gone, and I need to pump it up, I have a compressor and was told that the pressure on the guage needs to be about 25, now when I placed about 25psi into the tank according to the gauge on the hand held pump, not on the pump guage.

    The actual pump gauge did not move, remained on 0psi. At this point I thought, "better not pump to much don't want to blow the bloody thing apart" the question is, how do I get the pump bladder to fill up, do I keep pumping in air or is there a set procedure, (that the salesman forgot to mention) Hoping you can help or its a smelly sleep.
    Girls often run through my mind, they dare not walk...
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  3. 25th August 2005, 08:06 PM #2
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    Default

    Greyham

    I don't know much about Grundfos pumps but I have a couple of pressure water pumps which I just put the air pressure into the bladder and just turn the pump on and as long as the pump is primed it will start pumping water and if the taps are turned off the pump will pump until it gets up to the pressure of the cut off pressure of the pressure switch.

    Maybe the the pump pressure gauge doesn't show pressure until the pump reaches the pressure switch pressure.
  4. 25th August 2005, 08:38 PM #3
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    I have a couple of diferent types of Grundfos pumps. The pressure pump I have also has a presure guage. The reading it shows is water pressure, not the air pressure.

    When you go to start it, make sure it is primed, leave the nearest outlet open, and fire it up. The reason for an open tap is that there will have been air introduced into the system. Once everything is going hunky dorey, close the outelt, watch your guage, it should rise, then when it reaches the pre-dertimned pressure, the pump will switch orf.

    Open the outlet again, all being well, the pump will fire up at the correct juncture.

    Probably a good idea to open the further most outlet to bleed any remaining air in the system too.

    If the pump doesen't turn off, you may have too much air in the tank. Keep an eye on your guage, and guage it from that. Rapid turning on and orf, or rapid cycling is agood indicator of too little pressue in the tank.

    Happy pumping dude.
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  5. 25th August 2005, 10:02 PM #4
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    Default

    Thanks for your timely advice, I took both advice and came up trumps, actually the water pressure is slightly harder than before, but now working regardless, thanks for your help. This is a great site
    Girls often run through my mind, they dare not walk...
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