Elmo Rietschle R-WPB - Manual (Page 6)

Rietschle Thomas GmbH + Co. KG page 6 / 23
Vacuum version WVB:
4
3
F
F Air flow
1. Non-return valve
2. O-ring
3. Compensator
4. Sealing
While overpressure blower sets contain discharge pressure
gauges, vacuum blower sets contain suction pressure
gauges. If either a non-standard blower set or a separate
blower is delivered, a pressure gauge must be installed on
the pipeline as near the discharge flange of an overpressure
blower set/blower or the suction flange of a vacuum blower
set/blower as possible.
Due to gas pulsation, it is necessary
to use pressure gauges resistant to cyclical fluctuations in
the pipeline pressure, for example glycerine-charge
pressure gauges. If you use an ordinary pressure gauge, an
absorber must be installed between the pipeline and the
pressure gauge. After setting the blower set in its position,
you must open the plugs of the glycerine-charge pressure
gauges in order to de-aerate them. Otherwise, they will
indicate incorrect values! If a blower set with a acoustic
enclosure is delivered, once it has been set up it is
necessary to interconnect the pressure gauges installed on
the enclosure and the measurement points on the blower set
with the supplied tubes.
For overpressure blower sets: the point on the blower’s
suction flange located below the suction filter must be
interconnected with the button connected to the pressure
gauge that is designed for measurement of filter insert
clogging. Further, the point on the discharge silencer must
be interconnected with the glycerine-charge pressure
gauge.
For vacuum blower sets: the point in front of the suction
filter must be interconnected with the pressure gauge
installed on the hood.
Connecting the Pipeline to the SHARK compact blower
You must ensure that the intake medium is free of
impurities.
Blowers could suck in outside air. Equipping the blower
with a suction filter produced by RT will suffice in order to
ensure purity of the intake air.
If a pipeline is to be used for transport of air to the suction
part, it is suitable to equip the blower with a RT suction
filter (used for vacuum blower sets) in order to connect the
pipeline. It is also necessary to install a compensator
between the suction filter and the pipeline.
If the intake air is filtered centrally for more blowers, you
must carefully clean the suction pipeline of foreign
particles. A compensator must be installed between the
blower and the suction pipeline. It is suitable to use a
suction sieve installed as near to the blower’s suction
flange as possible for the first 500 operating hours. Suitable
sieve densities can be derived from the following table,
which provides permissible sizes of impurities for
individual blower types:
It is not permissible to load the blower sockets with the
pipeline. Before being bolted together, the flanges of the
pipeline and the blower must fit closely. The maximum gap
in the gasket circumference can be 0.05 mm, as shown in
the picture.
0,05
After the flanged connections have been tightened, the
blower must spin smoothly!
Rules for connecting the pipeline:
• The pipeline must be installed in the compensator axis.
• The pipeline must be placed on both fixed and sliding
points. It is not permissible to load the compensator with
the pipeline weight. The first fixed point of the pipeline
must be as near to the compensator as possible.
• The pipeline diameters should not be smaller than the
nominal inside diameters of the blower flanges.
• The recommended flow speed in the pipeline should be
below 22 m.s -1 .
• If possible, large radii of pipe bends should be used (in
order to reduce loss).
• The closing fittings must be installed near the branches
in order to prevent impurities from accumulating in the
blind pipeline branches.
• Hot (discharge) pipelines should be insulated.
• The wall openings should be flexible and the pipeline in
them should be soundproofed (do not cement the
pipeline in the openings).
• Compensators should be installed on long and branched
pipelines.
• You should avoid the pipeline running perpendicularly
into the registers. You should check the lengths of those
registers where standing waves could occur for the
excitation frequencies of sextuple blower revolutions
(the frequency of the air pulsations).
When designing pneumatic transport, cement clarification,
and similar applications where contaminated transported air
(the volume between the non-return valve and the
technological device) could expand after the blower has
been turned off, you must consider such applications or
ensure that the pollutants are separated when the air is
flowing back (the mechanical non-return valves do not
close immediately). Contact RT in these cases.
Warning: Only authorized persons with appropriate
electrical qualifications are allowed to connect electrical
devices.
Blowers, compact units, acoustic enclosures and electric
motors are equipped with earth lugs. The protection of the
standard blower set is determined by the electric motor
protection (IP 55).
The wiring must meet the requirements for machinery in
accordance with the 98/37/ES Directive and primarily the
requirements stipulated in the EN 60204-1 Standard. Such
requirements must be ensured by the electric part supplier.
The standard deliveries of the RT blower sets contain only
the electric motor terminals. If the delivery also includes
the control system, only the power cable (if not included in
the delivery) must be installed and connected. More
detailed instructions are given in the separate manual for
the control unit.
The supply cable must not restrict the movement of the
motor and its pendulous frame!
Electric motors should be connected in accordance with
recommendations from their Manufacturers. The
connection diagram is attached to the inside of the cover of
the electric motor’s terminal block. We recommend starting
Blower WPB /
WVB
120
300
400
430
550
750
780
1000
1300
1600
2000
3000
4000
5000
6500
7000
8300
Permissible
impurity size [mm]
0.01 0.05 0.07 0.09 0.1 0.2
3.5 I
NSTRUCTIONS
FOR CONNECTING
THE BLOWER SET TO
THE POWER SUPPLY
3 F 4 1 2 4