CE-Symbol of conformity. This symbol of
conformity guarantees that this appliance
conforms to the relevant safety guidelines of
the European Union.
1.2 Guidelines
This appliance conforms to the following
safety guidelines:
• Machine guidelines 98/37EG, with
amendments.
• Electro-magnetic Compatibility 89/336/
EWG, with amendments.
• Low-voltage guidelines 73/23/EWG, with
amendments.
• Pressure vessel guidelines 87/404/EWG.
1.3 General Notes
• These Installation and Operating
Instructions form an integral part of the unit.
They must be kept close to the unit and in
readiness whenever required. Precise
observance of these instructions is a precondition for use of the unit for the intended
purpose and for its correct operation.
Die Montage- und Gebrauchsanweisung
sollte gegebenenfalls an Nachfolger weiter
gegeben werden.
• Safety for the operator as well as troublefree operation of the unit are only ensured if
use is made of original equipment parts.
Moreover, use may only be made of those
accessories that are specified in the
technical documentation or that have been
expressly approved and released by Dürr
Dental for the intended purpose.
Dürr Dental cannot guarantee for the safety
or proper functioning of this unit in the case
where parts or accessories are used which
are not supplied by Dürr Dental.
• The guarantee does not cover damage to
caused to this unit where parts or
accessories are used which are not
supplied by Dürr Dental.
30
• The guarantee is valid for 1 year
commencing from the date of delivery. Any
work performed under guarantee will
neither extend nor renew the guarantee.
• Dürr Dental only regard themselves as
being responsible for the equipment with
regard to safety, reliability and proper
functioning if assembly, resettings,
changes or modifications, extensions and
repairs have been carried out by Dürr
Dental or an agency authorised by Dürr
Dental and if the equipment is used in
conformity with the Installation and
Operating Instructions.
• These Installation and Operating
Instructions conform to the relevant version
of the equipment and the underlying safety
standards valid at the time of going to
press. All switches, processes, trade
marks, software programs and appliances
named in this document are registered
names.
• Any reprinting of the technical
documentation, in whole or in part, is
subject to prior approval of Dürr Dental
being given in writing.
1.4 General Safety Notes
This compressor has been designed and
constructed by Dürr Dental so that correct
usage of the appliance is virtually free of any
possible injury or danger. In spite of this, we
feel it is our duty to mention the following
safety measures in order to prevent any
possible danger to all personnel.
• When using this compressor all local and
relevant regulations must be observed! In
the interests of trouble-free operation the
operator is responsible for observing
these regulations.
• Retain the packaging for possible return of
the product to the manufacturers. Ensure
that the packaging is kept out of the reach
of children. Only the original packaging
provides adequate protection during
transport of the unit.
Should return of the product to the
manufacturers be necessary during the
guarantee period, Dürr Dental accepts no
responsibility for damage occurring during
transport where the original packaging
was not used!
• Before every use the operator must check
the functional safety and the condition of
the appliance.
• The operator must be knowledgeable in the
operation of the appliance.
• The product is not designed to be used in
medical treatment areas where there exists
the danger of explosion. Areas where
explosions could occur are those where
flammable anesthetic material, skin
cleansers, oxygen and skin disinfectants
are present. This appliance is not to be
used in areas where the atmosphere could
cause fire.
1.5 Electrical Safety Notes
• The compressor may only be connected to
an earthed safety socket or CEE-socket,
depending on model of compressor.
• Before connecting the appliance to the
power supply check that the electrical
current and the frequency of the device as
described on the appliance are compatible
with that of the power supply.
• Check the appliance and the power supply
cables for possible damage before
switching on. Damaged cables, plugs and
sockets must be replaced before use.
• In danger situations or in cases of technical
defect immediately separate from the
power supply (unplug).
• In cases of repairs and/or maintenance the
compressor must be disconnected from
the mains supply, and the air supply hoses
as well as the pressurized container must
be depressurized.
1.6 Warnings and Symbols
In the Installation and Operating Instructions
use is made of the following terms or
symbols to denote information of special
importance:
Information and/or mandatory
regulations or prohibitions for the
prevention of personal injury or
substantial property damage.
Warning! High voltage.
Special information regarding the
economical use of the equipment and
other information.
CE-Labeling
Disconnect from mains supply.
Warning! Hot surface.
Warning!
Compressor starts automatically.
Check environment. The appliance
should not be used in wet or damp
conditions.
Recycling
Observe installation and operating
instructions!
31
2. PRODUCT INFORMATION
2.1 Correct Usage
This compressor is only designed for
providing compressed air for dental units or
similar applications.
Mounting in medical treatment units:
During the development and production of
this surgery compressor all requirements
concerning medical products were taken into
consideration wherever possible. Thus this
appliance can be mounted in medical
treatment units.
Where this appliance is mounted in medical
treatment units, then the requirements of
guidelines 93/42 EWG must be observed on
installation and operation.
2.2 Use other than that for the
intended purpose
The compressed air provided by
this unit is not suitable for use in
breathing apparatus or similar
facilities without the addition of
special filters, such as those used
in surgical areas.
• The compressors are designed for use in
dry, ventilated rooms with an ambient
temperature of +10 to +40 °C.
• Do not set up the compressor in the rain.
The machine must not be used in wet or
damp conditions. Furthermore, operation in
the vicinity of gases or flammable fluids is
forbidden.
• Before installing the compressor in medical
facilities it must be checked that that the
available material is designed to satisfy the
requirements of the purpose for which is
intended. Please observe the technical
data.
• Any classification and conformity evaluation
should be carried out by the manufacturer
of the end product.
• Any other use or use beyond what is
specified is deemed to be not for the
intended purpose. The manufacturer
accepts no liability for damage resulting
therefrom. All risk is borne solely by the
user.
2.3 Product description
The Dürr Compressor 51../52.. provides an
oil-free, dry and filtered pressurized air, for
use in medical units.
(H x L x D)cm 68 x 40 x 45 68 x 40 x 48 68 x 40 x 4568 x 40 x 48
Transport and storage conditions
Temperature
Relative humidity
-25 °C to +55 °C
10% to 90% (no condensation)
Operating conditions
Temperature
Relative humidity
+10 °C to 40 °C
up
to 70%
-1
1400140014001400
* Time taken for the compressor to reach the
shut-off pressure of 7.5 bar from start-up
pressure of 0 bar
35
5. FUNCTION
1718
1
2
8
3
16
14
13
15
12
10
11
4
7
6
5
36
6. FUNCTIONAL DESCRIPTION
6.1 Compressor
Atmospheric air is drawn into the cylinder
chamber via a suction filter (17). The piston
(18) in the cylinder then compresses this air.
The inlet/outlet valve cuts off one flow route
thereby forcing the air directly into the tank
(10) via the non-return valve.
Where a DAS is present (2), the
compressed air is led through the spiral
cooling pipe (3) to the dry air system (2). In
this way the air, warmed on compressing, is
now cooled whereby most of the water
present in the air is extracted as
condensated water. Each time the
compressor motor is sitched ioff this
condensated water is collected in the
collection tank (5). The partially dry air is then
fed through the drying agent (6), the
Sintermetallfilter (4) and the fine filter (1) as
dry and hygienic air into the compressor
chamber (10). The non-return valve (7)
ensures the compressed air cannot escape.
The compressor motor (11) continues to
provide compressed air until the pressure
switch (16) registers that the pressure
correct level has been achieved. (The actual
pressure can be read off the pressure
gauge (15).)
If the maximum relative humidity in the tank
(10) is exceeded, then the Polyamidband
Hygrostat (8) expands, whereby a valve is
opened and dry air from the tank flows in the
reverse direction towards the DAS (2).
During this phase the unit is regenerating.
This means that the humidity present in the
DAS is carried via the dry air to the collection
tank (5). This regeneration procedure
repeats irself until such time as the pre-set
relative humidity at the Hygrostat (8) is
reached.
6.2 Control unit with pressure switch
If a user appliance (turbine etc.) draws off
compressed air, the tank pressure drops. If
in the tank the pre-set minmum pressure as
set at the pressure switch (16) is reached,
then the compressor motor is activated.
When the pre-set maximum pressure is
reached, the compressor motor is switched
off.
The control unit is fitted with a pressure
gauge (15) which displays the tank
pressure. A safety valve (12) prevents the
maximumm pressure from being exceeded,
eg in case of a defect.
The control unit is also fitted with a
condensed water drain tap (13) and a shutoff valve (14).
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