Controller calibration & pulsing

Discussion in 'Water Fed Pole Cleaning' started by Dolly, Sep 30, 2015.

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  1. Dolly

    Dolly Newcomer
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    I have just purchased a brand new v11 spring controller and shurflo pump with pressure switch but I am having problems . It won't auto calibrate as it comes up with p5 & error . I can calibrate it manually and the flow rate adjusts up & down ok but when it's on de I can hear my pump trying to start every 4 seconds which will probably use my battery if not switched off . I thought that once it was on de it shouldn't keep trying to start . I don't have any leaks anywhere and any ideas why it won't auto calibrate . I have changed my hose to different size as well but with no luck . Any help much appreciated as its doing my head in . I changed from a manual controller to a digital as was told they were a lot better and didn't leave pressure in your hose .
     
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  2. spruce

    spruce Grand Master
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    The electronic pressure switch is what it causing the controller to check every 4 seconds to see if the pressure in the hose has dropped. It's the way it all controllers with electronic pressure switches work. It sends out a pulse to start the motor to sense whether the pressure in the hose has dropped or not.
     
  3. Dolly

    Dolly Newcomer
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  4. Dolly

    Dolly Newcomer
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    Hi spruce and thanks for the reply. Do all electronic controllers do this and wouldn't it use the battery more if left switched on and not used. Also any idea why mine won't auto calibrate. I set it to 30 as the instruction manual says and then go to auto calibrate and the pressure switch i think kicks in and then it says p5 error and thats as far as it gets. I am on just to test it 30mtrs of 6mm internal hose.
     
  5. spruce

    spruce Grand Master
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    I don't understand what your issue is here. When you switch your tap off the controller will pressurise the hose and keep it pressurised ready for you to switch the water back on to clean the next window. The controller will test the pressure every 4 seconds and if the pressure in the hose has dropped (because you opened your tap) then it will start the pump.

    A manual controller relies on the manual pressure switch in the pump to switch the pump off when it reaches the pressure the pressure switch is set to; usually 100 psi although adjustable. All a manual controller does is slow the motor down which reduces the rate the pumps works at and hence reduces the flow at your brush head.

    If you have correctly calibrated your Spring controller then the electronic pressure switch will cut off at the optimized pressure you want your system to work at. Lets say that it sets the pump to kick out at 65psi. This means that your controller is saving you battery power as the pump draws more current to reach a higher cutoff pressure. So what little bit is being used when the controller pulses the pump to check that the pressure is still there has been more than saved to begin with.

    Overall, your pump will draw less current a day that the same pump working with a manual pressure switch and simple manual controller will.
     
  6. Dolly

    Dolly Newcomer
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    Ok Thanks, I just presumed that once my tap was turned off that it wouldn't use any battery. Didn't realise that it would pulse every 4 seconds to check but if I save on battery against a manual one then thats fine. On the calibration issue, have you any idea why my controller won't do the auto calibrate as it just says p5 err after trying. I have contacted the supplier of this but haven't had a reply.
     
  7. spruce

    spruce Grand Master
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    They all do. I don't have a V11 controller, but I do have a Varistream (4 actually), and they do exactly the same thing.

    The difference between the Spring and the Varistream is that ours doesn't have auto calibrate. We have to set ours manually.

    We do this by running the pump at the flow rate we prefer and then set the calibration to cut out just above that flow.

    Ian Sheppard from Spring has a wealth of info on how to calibrate these controllers. ian.sheppard@springltd.co

    Varistream controllers were introduced to overcome the problem most Shurflo pumps had in the early days of burnt out pressure switches.

    If the pump was left switched on for days on end, then yes, you would use battery current, but I wouldn't like to guess on how long it would take for it to flatten your battery. You wouldn't do that anyway. But leaving it on for 1/2 an hour won't make much difference - it never has done with ours.

    We use 2 pumps most days with a 110 amp leisure battery. With the controller set at the flow we use our pump draws between 3.5 and 4 amps, which is much less than they would using the pump's pressure switch. I was watching the amp meter gauge we have across the leisure battery the other day and most of the time the 4 second pulse was so fast the gauge didn't pick the current draw up.
     
  8. Dolly

    Dolly Newcomer
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    Many thanks Spruce , I'm sure I will get to the bottom of it and thanks again for all your advice .
    Many thanks Shaun
     
  9. jimmyboots

    jimmyboots Forum Addict
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  10. Dolly

    Dolly Newcomer
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