Elmo Rietschle R-WPB - Manual (Page 7)

Rietschle Thomas GmbH + Co. KG page 7 / 23
the electric motors in the star-delta connection (soft-start,
etc.) even when the user could connect high-power electric
motors directly (in the delta connection). The “soft” start
saves the blower.
WARNING
Electric motors with power of over 11 kW must
not be started directly (in the delta connection)
without approval from the blower’s
manufacturer.
The electric motors of the compact units with
acoustic enclosure must be connected so that they
cannot be turned on if the electric motor fans in
the acoustic enclosure are not running – the fans
must exhaust air from the enclosures. Appendices
9 and 10 show the connection diagrams.
Due to transport of blower sets, the delivered belts are not
installed and the pendulous frame with the motor is secured
by bolts in the bottom position. Belts can be put on only
when the blower set has been set in its position. You must
first remove the bolts securing the pendulous motor frame
in the transport position. In order to lift the frame, you must
use a jack with the appropriate lifting capacity. An arrow
shows the point to place the jack. For smaller blower sets
(up to the size 2000), it is sufficient to use a screw jack
with a lifting capacity of 700 kg (the type used for lifting
private cars). For larger blower sets [from the size 3300
with motors from the 280 type (axial height in
millimetres)], you must use a jack with a lifting capacity of
2,000 kg, preferably a hydraulic one. The jack must be
placed on a solid base. If the jack is placed on a smooth
surface, such as a pavement or painted surface, you must
secure it with a rubber pad, for example, in order to prevent
it from slipping. Before starting any operation, you must
prevent the lifted pendulous motor frame from falling by
using suitable supports.
On the inside of the frame sidewall below the pendulous
motor frame, you must then install a stop checking the
lower limit of the pendulous motor frame misalignment.
Before putting on the belts, you must screw the stop bolt
into its bottom position.
WARNING
When putting on the belts, be very careful you do
not injure yourself by a suddenly falling
pendulous motor frame that might come loose.
You must hold the belt only at the place that will
not be in contact with the pulley when the
pendulous motor frame has been lowered. It is
also forbidden to touch the blower set at the
places between the edges
of the sub frame and the
pendulous motor frame, where a cutting effect
will occur when the pendulous motor frame is
moving.
Before putting on the belts, you must remove the supports
securing the pendulous motor frame in the lifted position.
When gradually lowering the pendulous motor frame, you
must ensure that the belts remain in the pulley grooves.
Since the pendulous motor frame is secured in its working
position only by tightened belts, you must therefore prevent
it from sudden loosening (with a jack, for example) before
adjusting the stop. The stop bolt must be adjusted to a
sufficient height so that the pendulous motor frame does
not hit it when the motor is starting. When new belts are
being installed, it is better to leave a larger gap between the
stop bolt and the pendulous motor frame as the frame will
lower after the belts have been set in their positions.
• The machine owner is obligated to observe the
provisions of this manual.
• The machine owner is obligated to maintain the
minimum spaces stipulated in this manual.
• The machine owner is obligated to see to good
readability of safety labels and markings.
• The machine owner is obligated to provide operators
with the protective equipment stipulated in this manual.
Machine hall ventilation
The machine hall is warmed by the heat radiated from the
motors, blowers, discharge silencer and discharge pipeline.
In order to reduce the machine hall temperature, the heat
must be suitably dissipated (machine hall ventilation). If
the output temperature is high, it is necessary to insulate the
outlet pipeline. In most cases when blower sets suck air
directly from the machine hall, you must ensure forced
ventilation of the machine hall.
WARNING
It is not permissible to direct flow of cool air
towards any part of the blower casing. Local
cooling causes thermal deformation – the blower
could thus be damaged.
Appendix 8 shows the ventilation diagram. When
designing the machine hall, you must remember sufficient
openings for both cooling air intake and warmed air
exhaust. It is assumed that the fans will be located in the
exhaust section. Cooling air intake for the blower suction
from the machine hall must be designed so that sufficient
volumes of both cooling air and air sucked by the blower
set are ensured. If the intake air is transported from outside
by a pipeline, it will suffice to dimension the inlet opening
only for the cooling air volume and fit the exhaust section
with fans of the required capacity. The air speed in the
openings should range between 5 m.s
-1 and 10 m.s -1 . The
suction and exhaust openings must be designed so that no
noise will escape from the machine hall.
3.7
P
RECAUTIONARY
MEASURES
3.8 M
ACHINE HALL
VENTILATION
3.6 B
ELT
INSTALLATION