Owner manual

12
09704-09.2013-DGbFITrCn
D
GB
F
I
TR
CN
4| Compressor assembly
 During operationwithcapacity controllers(Accessories,Chap.7),the changing load can cause
increasedrunningnoisesandbeltdrivevibrations.
4.3 V-belt drive
4.5 Electromagnetic clutch assembly
ATTENTION! Inappropriately designed belt drives, especially belt knocking or
excessive tensioning forces can cause compressor damage!
Make sure that the drive belt is designed correctly, e.g. by using
 tensionersandselectingthebeltproleandthebeltlength.
Thefollowingdescriptionappliesforanelectromagneticclutchsecuredtoashaft.
To absorb the magnetic eld of the electromagnetic clutch, the front bearing ange has
asnugt148h8(seeFig.11).
Toconnectthemagneticeld,loosenthe4cheeseheadscrewsM8onthebearingange
(seeFig.11).
Slidethemagneticeldtoasnugtandre-attachusingthefourcheeseheadscrewsM8
(Fig.12).Screwtorque=34Nm.
Furtherassemblyoftheelectromagneticclutchaccordingtotheclutchmanufacturer.
Fig.11
Bearingange,front
Magneticeld
Fig.12
148h8
4.4 Main bearing load
Topreventthebeltdrive overloadingthecompressormainbearing,
ensurethat:
Theengagementforceappliedbythe belttension(centre of
shafttaper,seeFig.11)mustnotexceedF
maxper.
=2750N.
Iftheforceengagementpointshiftstotheright(seeFig.11,
smallpoint),theforceF
maxper.
reducesasperthefollowing
formula:
F
maxper.
=
245kNmm
(90mm+L
1
[mm])
F
max
=
2750 N
M
bmax
=
245kNmm
L
1
(mm)
Fig.10