W.Tech RAA Series Manuale delle Istruzioni Pagina 8

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Theassemblycouldhehelped bymeansofpointers,whichwillbeinsertedintheholesinthelowerbodyjustbeforetheupperoneis
allowedtorestonit.Pleaseseefig.7.

 Fig.7
3.4 Electricalconnection
Ourunitsarenormallysuppliedwiththeelectricalmoto
rsalreadycabledandthewiresareavailableoutsideoftheunitminimizingthe
labour on site. In case of particular motor versionsor if the electrician is willing to rewire all, please findbelow the procedure to
follow.Inordertoconnectthemotorofthefans,itisnecessa
rytogoinsidetheupperbody,throughitsinspectionmanholes,seefig.
2.
Introducetheconnectioncabletilltheterminalbox,throughtheholesavailableinthecasing.
Capturethecabletooneofthepipesthatcomposesthemotorsupport,bymeansofclamps.Seefig.8.


Fig.8
Tomaketheconnectionofthemotors(andalsoofthefansandtheelectricalpump)thefollowingmeasureshavetobeconsidered:
Before connecting themotorterminals tothemains, make sure thattheterminal voltageshownonthe motorplate is the
sameasthemai
nsvoltage.
Makesurethatmotorterminalsaretightenedsecurelyandthatallstrippedwiresarecarefullyinsulatedinordertocarryout
theconnection.
Checkthattherotationdirectionofthefanisthesameasthedirectionofthearrowsavailableonthediffuser.
Wer
ecommendthatthemainssup plylinetothemotorshouldbeprotectedwithwellcalibratedthermal relaysandfuses.
Please remember that in acrosstheline starting, a squirrel cage motor needs an intensity 6 to 7 times higher than the
nominalone.
Makesurethelocalelectricalsafetyreg
ulationsinforcehavebeenrespected.
3.5 Otherdetailsfortheinstallation
Check and remove any material or element which has been part of the packing, and could be still joined to or inside the
tower.
Connectbothexternalpartsofthepipe.
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