Grundfos JPF 3-A User Manual

Project2:Layout 1 4/22/11 6:59 PM Page 4
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Project2:Layout 1 4/22/11 6:59 PM Page 4
Untitled-1 1 4/22/11 7:07 PM
Project2:Layout 1 4/22/11 6:59 PM Page 4
Untitled-1 1 4/22/11 7:07 PM
Project2:Layout 1 4/22/11 6:59 PM Page 4
Untitled-1 1 4/22/11 7:07 PM
Handbook
Troubleshooting
Troubleshooting:
Suction Lift:
 Wheninstallingabovegroundsuctionliftpumps,thefollowingbasicrulesmustbeadheredto:
  •Avoidfrost.
  •Pumponlycleanwater.
  •Installafilterifwatercontainsimpurities.
  •Afoot-valvemustbeinstalled.
  •Thesuctionpipemustbe100%airtight.
  •Thepumpmustbeprimedbeforestartingforthefirsttime.
Fault Cause Remedy
1. The pump is running but
there is no pressure.
a) The pump and suction pipe
work need to be primed.
Fill the pump and pipe with
water.
b) The suction pipe is not 100% tight.
Check all connections and the
suction pipe. Replace if
necessary.
2. The pump does not stop.
a) The pressure switch is set incor-
rectly.
Check the setting
and adjust accordingly
3. The pump does not deliver
enough water.
a) Lack of water in the well. Drill new well.
b) Suction pipe is not 100% tight.
Check all connections and the
suction pipe. Replace if
necessary.
c) Pipe system is blocked. Clean pipework.
d) Pump capacity is not sufficient
Replace with a larger capacity
pump
4. Pump switches on and off
frequently.
a) Pre-pressure in pressure tank is too
low or too high.
Adjust pre-pressure in pressure
tank. (0,9 x cut-in pressure)
b) Faulty footvalve.
Check footvalve,
replace if necessary.
c) The pressure switch differen-
tial between the start and stop
pressures is too small.
Increase the differential.
Flooded Suction:
  Wheninstallingabovegroundsuctionboosterpumps,the
  followingbasicrulesmustbeadheredto:
  •Inletpressure.
  •Avoidfrost.
  •Pumponlycleanwater.
  •Avoiddry-running
  •Anon-returnvalvemustbeinstalled.
  •Thesuctionpipemustbe100%airtight.
  •Thepumpandpipingmustbeprimedbeforestarting
   forthefirsttime.
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Handbook
Accessories
Fault Cause Remedy
5. The pump is running but
there is no pressure.
a) The pump and/or suction pipe
is incorrectly primed.
Prime the pump and/or suction
pipe with water.
b) The non-return valve or suction
pipe is leaky.
Replace the non-return valve
and/or seal the suction pipe.
6. The pump does not deliver
enough water.
a) The suction lift is too high.
Check the distance from the
pump to the water level in the
well. If possible, mount the
pump nearer the water level.
b) Pressure switch settings are incor-
rect
Adjust settings accordingly
7. The pump has run for a
long time, but delivers no
water when restarted after a
standstill.
a) The pump and/or suction pipe is
emptied of water.
Prime the pump and/or suction
pipe with water.
8. Pump switches on and off
frequently.
a) Pre pressure in pressure tank is
too low or too high.
Adjust pre-pressure in pressure
tank. (0,9 x cut-in pressure)
b) Faulty foot valve.
Check footvalve, replace if nec-
essary.
c) The pressure switch differential
between the start and stop pressures
is too small.
Increase the differential.
Pressure Tanks:
  Keepthefollowingtipsinmind,whendealingwithinstallationsusingpressuretanks:
  •Stopthepumpandopenavalvetorelievethewaterpressurebeforecheckingthepre-chargepressureof
   thetank.
  •Fortraditionalon/offcontrolledpumps,thepre-chargepressureshouldequalthecut-inpressuremultipliedby0.9.
Installation note:
 YoushouldalwaysconsulttheInstructionandOperationmanualforeachspecificpumpduringinstallationandstart.
WebCAPS:
 FinddetailedinformationviatheGrundfoswebsite.WebCAPSisaneasytouseon-linetoolthatenablesusers
 tosizesystemsandaccessgeneralinformationaboutourproducts,whereyoucaneasilydownloadthemost
 up-todatepumpinformation.
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L-DWS-PG-01 8-09.indd 8 11/12/11 12:49 AM

Grundfos JPF 3-A Specifications

General

Brand	Grundfos
Model	JPF 3-A
Category	Water Pump
Language	English