Attention!
ER..C plug fans may only be operated in installation position H (fan upright, motor shaft
horizontal).
4.5 Mounting RH..C
Attention!
Whenever working on a fan, under no circumstances loosen the bolts that hold the
impeller to the hub!
Impeller and hub together form a balanced module which may only
be removed and
fi
tted as a complete unit. Loosening these bolts can lead to imbalance
and therefore to vibrations, even if the bolts are tightened correctly before restarting the
fan!
Impellers with
fi
xed hub
•
The impeller is connected to the shaft end of the drive motor using a
fi
xed hub.
•
Assembly: Lightly grease all bare surfaces (shaft end, hub bore). Fit the impeller with
hub (1) as far as the shaft shoulder (2) (transition
fi
t). If the weight is
appropriate, secure with lifting gear. Fit the axial shaft fastener using a screw (3) and
washer (4). Observe the tightening torques set out in the table. The screw (3) should
be secured with a lock washer (e.g. retaining or contact washer). On motors from
BG132 onwards (shaft
Ø
38) the EN 14986 standard stipulates that a special washer
with screws (5) must be
fi
tted for additional security. Observe the tightening torques
set out in the table.
•
Disassembly: Release the axial screw connection and pull off the impeller with the
hub using a suitable pulling unit (secure with hoisting device at the corresponding
weight). For motors starting from BG132, the additional axial shaft-locking device (5)
must be released also.
Assembly instructions
RH..C and ER..C
Mounting
L-BAL-F019-GB 2021/12 Index 003
Part.-No. 00282064-GB
21/48
