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Adjusting the capacity of RGES
To avoid overloading the motor during starting please take note of the following:
1.
Do not start the radial blower unless it is connected on the pressure or suction side.
2.
If the air requirement of the system is variable e.g. through valves, taps or variables inlet and/or outlet orifices then these should be set so
that maximum capacity is utilised. During start up this condition will result in the highest motor load.
3.
The full load current as indicated on the nameplate of the blower motor determines the maximum available capacity of the blower.
When starting up the blower please check:
a) Whether the voltage and the frequency correspond to the data on the data plate.
b) Whether at peak load the full load current is exceeded?
4.
Exceeding the full load current indicates (if the voltage and frequency are correct) that the blower has been overloaded with regard to capacity.
In such a case the power should be adjusted by throttling. Throttling can be achieved without changing the base unit itself as follows:
4.1 Insert a ring shaped orifice plate made of aluminium or steel between the connection flange of the blower and the pipe or at any place in the
pipe. Its outside diameter and fixing holes should conform with the size of the flange. However its inside diameter should be smaller than the
effective diameter of the flange. Adjust the internal diameter so that the amperage does not exceed the full load current.
Or:
4.2 Insert an adjustable valve i.e. ball or butterfly between the connection flange of the blower and the pipe or at any place in the pipe and adjust
it so that the running amps do not exceed the full load current. It is advisable
to clamp the valve in this position so that the setting cannot be altered unless
by authorised personnel.
The points 4.1 and 4.2 can be omitted if it is possible to reduce the power to
the design value by reducing the suction and/or exhaust diameter or by
increasing the flow resistance within the system.
5.
Instead of adjusting the system to the existing blower, it is possible depending
on the model of blower and on the rating of the motor to use the same size
blower but with a larger motor. For further advice please contact your
Rietschle representative.
Potential risks for operating personnel
Noise Emission: The worst noise levels considering direction and intensity
(sound power), measured according to DIN 45635 part 3 (as per 3. GSGV), are
shown in the table at the back.
When working permanently in the vicinity of an operating pump we recommend
wearing ear protection to avoid any damage to hearing.
Maintenance and Servicing
When maintaining these units and having such situations where
personnel could be hurt by moving parts or by live electrical parts the
blower must be isolated by totally disconnecting the electrical supply. It is
imperative that the unit cannot be re-started during the maintenance opera-
tion.
1. Air filtration
The capacity of the blower can be reduced if the air inlet filters are not
maintained correctly.
a. Mesh disc on the filter pot (G
Cleaning of this is possible through the opening (A) (see pictures
b. Inlet filter cartridge:
These inlet filter cartridges (f) should be cleaned monthly and changed yearly
depending on the degree of contamination.
Inlet cartridge cleaning: Remove thumb screws (m). Remove filter cover (d
d
). Pull filter cartridges (f) off and clean either by knocking out by hand or by using
4
compressed air. Reassemble in reverse order (see pictures
2. Lubrication (pictures
to
After initial start check oil level monthly at oil sight glasses (I). Top up the oil
at (H) if the oil level has reached the lower point of the sight glass. Refill until the
oil level reaches the top half of the sight glass. The oil filler plug (H) should be
screwed down securely to avoid any oil leaks. The first oil change should be after
200 operating hours and after that every 3000 operating hours.
To change oil: drain the contaminated oil at oil drain point (K), refill with fresh oil
at oil filling point (H), approximately 2.7 litres.
The viscosity must correspond to ISO-VG 32 according to DIN 51 519.
We recommend the following oil brands: BP Energol HL-XP 32, Esso Torque
Fluid N 45, Mobil Mobilfluid 125, Shell Tellus oil 32 and Aral Vitam GF 32 or
equivalent oils from other manufacturers (see oil type plate (M)).
If the oil brand is changed, the old oil must be drained completely from
the oil chamber.
Old and used oil must be disposed of corresponding with the relevant health,
safety and environmental laws.
) and suction flange (G
):
1
2
)
and
).
, d
,
1
3
,
and
).
RGES (30) / (34)
f
m
RGES (16) / (33)
f
d
3
m
RGES (32) / (36)
f
m
d
1
d
4
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