Owner's manual

-16-
GB
- Allwaterconnectionsmustbeinstalledatalevelatwhichthepipelineand/orhydraulic
casingofthepumpand/ormotorcasingarenotooded.
- Check that the mains voltage agree with the particulars stamped on the rating plate.
- Fuseonthesideofmains:pleaserefertotheratingplate.
- Thepump/systemmustbeearthed(grounded)inaccordancewiththeappropriate
standards.
5.2.1 Electrical connection of pumps
Electrical connections of the pumpmust becarried outin accordancewith thewiring
diagram(Fig.3),attachedonthebottomofmotorcover.Beforedoingthatunwindthe
uppercover(Fig.1-POS.2).
Fig.3
6. Start up
6.1 Loading and deaeration
Inthe pumpsof types GHN(basic auto),GHND (basic, auto),GHNMD (basic,auto),
GHNMD (basic, auto) the rotor is submerged and provided with special water-lubricated
bearings. Before putting the pump into operation, it has to be lled with water and
deaerated.Deaeratethepumpbyunscrewingascrewonthebacksideoftheelectric
motor(Fig.1-POS.5).Airwillowoutthroughthecleftbetweenthemotorshaftandthe
bearing.Whenwaterstartstoowout,closethevalvesatboththesuctionandpressure
sideofthepump.Startthepumpandcheckthedirectionofshaftrotation.Incaseofa
wrongdirectionabuilt-inashlampwillstarttoblinkwithredlight.
Thepumpisalsoprovidedwithotherdetectorsforidentifyingerrors,listedinthetablebelow.
Theredashlampconveystheerrornumber.Afterasequenceofashesalongerinterval
proceedsandthenumberofashesbetweentwointervalsindicatestheerrorcode.
Duringtheoperationandwithhightemperaturesofthepumpinguidthepump
will warm up. Do not touch the pump! Danger of burns!
6.2 Setting the speed for the pumps GHN, GHND, GHNM,
GHNMD ( basic)
Eachpumpisabletocovertheareasofthreehydrauliccharacteristics.Toachievethis,
ithasaninbuiltelectricmotorwiththreedifferentrevolutionspeeds.Forachievingthe
selected characteristics or speeds , the pump has a push button (Fig.1-POS.
4), with which we change speeds.