Owner's manual

Ifthepumpisoperatinginthereverse,thepowerconnectionsmustbechangedbyanelectrician.
Oncecorrectlyconnectedandinstalledwithwaterinthepitetc,theelectricianshouldalsocheckforcorrectpowerusage,
phasebalanceandgeneralelectricalintegrityoftheinstallation.
Fault Checks
(A) Pump will not start:
(1) Manual Type
• ChecktoensurepowerisavailableandtheoutletisswitchedON.
• Blownfuseortrippedcircuitbreaker(replace/resetorcallanelectrician).
• Ifanextensionleadistted,checkconnection.
• Impellerjammed-disconnect from power supply,andensureimpellerisfreetorotate.
• Thermalcut-outswitchhasnotreset(waituntilresetorresetoverloadfor3Ø).
• Ifpumpdoesnotstartfromnewthenthesealhaspossiblystuckduetothelengthoftimeithasbeen
standingsinceitwasmanufactured.Inthiscase,disconnectfrompowersupply,removebottomstrainer
andturntheimpellernutclockwise,thiswillreleasetheinitialfrictiononthesealandoncethepoweris
connectedwillallowthepumptowork.
(2) Auto Type (with oat switch)
• Checkallin(1)above.
• Floatswitchjammedagainstsumpsidewall.
• InsufcientliquidtoplacetheoatswitchintheONposition,i.e.higherthanthehorizontal.
(B) Pump runs, but does not pump water or pumps insufcient water:
• Checkforcorrectdirectionofrotation(3Øonly).
• Insufcientliquidinsump.
• Strainer,impellerand/ordischargepipeworkblocked.
• Impellerdamaged.
• Airlockindischargepipework.Ensurepumpislledwithwater.
• Excessivebackpressureorlift.
(C) Pump will not stop:
(1) Manual Type
• Mustbeswitchedoffatthepowersupply.
(2) Auto Type (with oat switch)
• Floatswitchispreventedfrommovingtothefullydownposition.
• Floatswitchmaybefaulty.
4 5
(D) Pump runs for short periods only (the overload protection has tripped):
• Someforeignbodyiscloggingtheimpeller.
• Theliquidtemperatureistoohigh.
• Electricalfault.
Donotrunthepumpdryasthiswilldamagethesealandreducethelifeofthepump.
Where hair, lint or other string-like material may be in the water, the pump should be regularly checked. It might become
necessary sometimes to clean the suction strainer, impeller and/or discharge pipework.
Withsimplecleaningandregularexaminationthispumpshouldgivereliableservice.
Maintenance
Theoilinthesealchambershouldbeperiodicallycheckedandreplaced.Thisworkshouldbedonebyasuitably
qualiedDaveyServiceDealerevery2,000hrsofoperationorevery12months,whicheveroccursrst.
GRINDER MODEL comes with in-built seal cavity sensors tted. These sensors may be connected to a sensor
relay to provide motor protection in the event of seal failure. If you do not require the seal sensor function,
simply x and isolate the sensor lead in a weatherproof enclosure.
NOTE:
1. Long extension leads should be avoided as they often have insufcient current carrying capacity to run
electric motors, hence they can cause substantial voltage drop and operating problems.
2. Minimum voltage at the electric motor must not fall below 216 Volts for single phase, otherwise motor dam-
age may result which is not claimable under guarantee.
3. If the electrical ttings in your country make it necessary to remove the plug (where tted) from the lead
tted to the motor, care should be taken to ensure that the earth conductor green/yellow in the lead is
properly connected to a good earth. This work should be undertaken by a suitably qualied person.
4. Expansion and contraction inside the motor due to heating and cooling is vented via the lead. The lead end
must never be sealed off, but must always be open to the atmosphere.
5. Three phase installations MUST always be phase balanced to within 5% variation.
6. Ensure all three phase models rotate anti-clockwise when viewed from the bottom or pump end.
NOTE:
If tting an extension lead a QUALIFIED ELECTRICIAN should be consulted to ensure correct rating is
provided. Extension leads are not allowed for permanent installations.
When using a phase indicator, please consult the manual of the unit before usage.
WARNING: When servicing or attending pump, always ensure power is switched off and lead unplugged.
Electrical connections should be serviced only by qualied persons. If the electrical supply lead of this pressure
system is damaged, it must only be replaced by authorised Davey service personnel as special tools are required.