Wassermann Gobi-2 User manual

USER MANUAL
Gobi-2
Gobi-3
Gobi-4
Fine Blasting Unit
Gobi-2 (-3 / -4)
115 V

Dear customer,
Than you for choosing a product from the Wassermann range. Wassermann Dental-
Maschinen incorporates the highest standards of quality and the latest technology.
In order to enjoy maximum performance and years of trouble-free operation, please read
this user manual carefully before you connect this device and start wor , and operate the
device according to the recommended guidelines. The operation safety and the
functionality of this device can only be guaranteed if you follow both the general safety
guidelines and the applying laws to prevent accidents as well as the precautions given in
this user manual. We are not liable for any damages which occur due to inappropriate
usage or faulty operation of this device.
Ma e sure that anyone using this device has read and understood this user
manual.
Keep this user manual in a safe place where it can be referred to as required at
any time.
The unit complies with the relevant EU guidelines.
The unit is subject to the EU guidelines 2012/19/EU (WEEE Directive).
Company address:
Wassermann Dental-Maschinen GmbH
Rudorffweg 15-17
21031 Hamburg, Germany
Phone : [phone]/ -24 Fax.: [phone]
[email protected]
www.wassermann.hamburg
Erstellt: 14.07.17/ msc Version: 2 Auftrag: 190898
.

Contents
1 Features.............................................................................................................................4
2 Safety Symbols used in this Manual..................................................................................5
3 Safety Guidelines...............................................................................................................5
4 Responsibility for Operation or Damage............................................................................6
5 Application..........................................................................................................................6
6 Before Starting...................................................................................................................6
6.1 Transport...............................................................................................................................6
6.2 Installation............................................................................................................................. 7
6.3 Storage..................................................................................................................................7
7 Installation/ Start-up...........................................................................................................8
7.1 Assembly Follow-up Kit.......................................................................................................10
8 Operation.........................................................................................................................14
8.1 General Operating Instructions............................................................................................14
9 Troubleshooting...............................................................................................................15
10 Care and Maintenance...................................................................................................16
10.1 Cleaning............................................................................................................................16
10.2 Maintenance...................................................................................................................... 16
10.2.1 Grip-cuff Replacement.........................................................................................................17
10.2.2 Screen Replacement...........................................................................................................17
10.2.3 Conducting Hose Replacement...........................................................................................17
10.2.4 Lamp Replacement..............................................................................................................18
10.2.5 Nozzle Replacement............................................................................................................18
10.2.6 Protection Filter Replacement..............................................................................................19
10.2.7 Water Separator...................................................................................................................19
10.3 Warranty............................................................................................................................ 20
10.4 Scope of Delivery/ Accessories (115 V version)................................................................20
10.5 Spare Parts........................................................................................................................21
10.6 Service Hotline [phone]/ -24.....................................................................21
10.7 Repairs..............................................................................................................................21
11 Technical Data...............................................................................................................22
12 Disposing of the Unit......................................................................................................22
12.1 Information on Disposal for Countries within the EU..........................................................22
13 EU Declaration of Conformity........................................................................................23

1 Features
This precision fine blasting unit of the Wassermann-brand offers you the highest quality
and most advanced technology.
This 2-chamber-unit is perfect for blasting, roughing as well as blasting with specially fused
alumina. The entire system is continiously under pressure and is therefore always ready
for use. The relation between air and the blasting medium is set at the factory. It is
determined by the size of the drillings. However, the discharge velocity can be varied by
the built-in pressure reducer. The discharge velocity determines the outflowing amount of
blasting media (while the relation is ept optimal and constant).
Even when switching on the unit again, you can use the quic -start- and quic -stop-
function to begin blasting immediately. This is possible due to the crushing valve at the
conducting hose.
This unit is equipped with a soc et (power consumtion: max 8 A).
■ 115 V version
■ reliable and reasonably priced fine blasting units with 2 to 4 chambers
■ quic foot-controlled start/stop function
■ precise wor ing pressure of 1–6 bar with pressure gauge control
■ optimum illumination, protected fluorescent lamp
■ special, particularly durable hoses
■ convenient colour coding system
■ comfortably to handle with ergonomically shaped handpieces
■ hygienic changeable sleeves
■ rapid ventilation of the blasting material containers for rapid re-filling and changing of
blasting material
■ possibility to connect to suction unit
■ long durability, high flexibility
■ specially coated protection screen for ideal visibility
4

2 Sa ety Symbols used in this Manual
Warning!
This is a warning of ris situations and dangers.
Failure to observe this warning could be life-threatening. These warnings has to
be observed.
In ormation!
This symbol draws your attention to specific features that has to be observed.
3 Sa ety Guidelines
Configuring and operating this equipment requires precise knowledge and observance
of the instructions in this user manual. The equipment is designed only for its intended
application.
WARNING:
Servicing and repairs should be carried out only by authorised specialists.
Disconnect the power plug before starting any maintenance wor .
The unit is designed to operate on 110-120 V / 50/60 Hz.
Ma e sure that the equipment is connected to the correct power source.
Working is only allowed with the blasting chambers closed.
Please wear sa ety goggles!
WARNING: Never connect to an oxygen bottle.
Risk o dust explosion.
5

4 Responsibility or Operation or Damage
The responsibility for operating the device lies exclusively with the owner or user if said
device is incorrectly serviced, maintained or altered by persons not employed by an
authorised dealer or if the device is used in a manner contrary to its specified purpose.
The unit has to be maintained and operated in accordance with this user manual.
Wassermann Dental-Maschinen GmbH is not responsible for damage arising from the
nonobservance of these instructions.
Warranty and responsibility provisions contained in the sales and supply conditions of
Wassermann Dental-Maschinen GmbH are not extended by these instructions.
5 Application
This 2-chamber-blasting unit is designed for blasting, roughing as well as blasting with
specially fused alumina.
Only use the device for this type of application.
6 Be ore Starting
6.1 Transport
Before transporting the unit, ensure that it has been unplugged from the power soc et.
Ma e sure that it is pac ed correctly in order to avoid accidental damage.
Be sure to chec for any transport damage when unpac ing the goods. Note down
any damage if found.
6

6.2 Installation
•Open the box, remove the pac ing materials, and carefully lift out the device and
accessories.
•Avoid lifting the unit on the mounting brac et of the air control unit because it could
bend or brea .
•Avoid lifting the unit on the additional tan s because they are only suspended.
There is a ris that you brea the additional tan s and the unit is dropped.
•The device has to stand horizontally on a steady and even surface.
•Chec the included accessories.
Install the device in a place where it will not bloc the wor ing area and the
functionality (ta e the dimensions into account).
Do not install the unit outdoors or in places without proper ventilation.
Before start-up, be sure the device reaches room temperature.
6.3 Storage
The unit location is very important when it comes to wor place safety, even if it is only to
be set up there for a short period. The room should be dry, well ventilated and vibration-
free. An even temperature and wooden supports also help. The unit should not be stored
or set up outdoors. If the unit is to be stored for an extended period, protect it from
moisture and dust.
7

7 Installation/ Start-up
Be ore starting the unit, connect up the following:
•Prepare a compressed air connection.
•Furthermore an external dust-extractor should be connected.
•The connectors are accessible from the bac .
•Finally, insert the power plug into the soc et, ma ing sure that the mains and the
unit operate on the same voltage.
Be ore using the unit, let it stand with open chambers until it has reached
room temperature.
•It is absolutely necessary to switch the unit off before filling.
•The chambers can first be screwed on when they are completely pressureless.
Press the red nob of the screwed-on cover at the right side until no outflowing air
can be heard.
All chambers are vented by pressing the according air vent knob.
•The chamber at the right (red) will always be filled with 110-250 my material.
•The chamber at the left (blue) will always be filled with 50-110 my material.
•If your unit has additional tan s you can individually choose the blasting material. If
required please as for add-on it.
•The chambers are only allowed to be filled up to 4 cm from the upper chamber
edge. The filling quantity shall not exceed the inside of the container located mar .
8

Be ore setting on the containers you have to assure that the threads and
sealing sur aces are ree o blasting media grains.
•Screw on the screwed-on cover properly in accordance with the colour indicator.
When all chambers have been screwed on the unit is ready for use and can be
switched on.
•Insert the power plug firmly into the power outlet (110-120 V / 50/60 Hz).
•Switch on the main switch (green toggle switch).
•Set the pressure reducer to wor ing pressure. There must be no hissing noise.
Otherwise, please retighten the screwed-on cover by hand.
9

7.1 Assembly Follow-up Kit
Please carry out the following preparatory measures:
•Before you start the assembly chec that the follow-up it has been delivered
complete.
•Unplug the Gobi-2 from its soc et so that the mains supply is disconnected.
•Remove your pressurised air connection to a safe distance and ma e sure that the
Gobi-2 is no longer “under pressure”.
•In the wor room remove the plug for the lead through of the steel stylus: left for the
left-hand add-on tan (yellow); right for the right-hand add-on tan (green). Figure 1
•On the left-hand add-on tan loosen the lower screw of the electro-cover.
Only loosen, do not remove! Figure 2
10
Plug, left
Plug, right
Only loose the
screw, do not
remove
Fig. 2
Fig. 1

Now you are ready to begin the following assembly tas s:
•Screw the screws delivered with the add-on tan loosely into position in the casing
of the Gobi-2. Figure 3 and 4
•Now hoo in the add-on tan onto the screw. Please ta e special care to see that
on all three of the hoo -in drillings the screw heads are flush. The “wing” of the tan
retaining plate must be pushed underneath the screw which is inserted in a
sideways position. Figure 5
11
Fig. 3 Fig. 4
The “wing” of the tan
retaining plate must be
pushed underneath the
screw.
Fig. 5

•All accessible screws are now to be screwed in tight.
•Push the steel stylus into the wor cabin through the hole in the casing.
•Close the hole with the lead-through grommet thereby fixing the steel stylus. Ta e
care to lay the steel hose with a slight curve and don’t let it buc le.
•Through the wor cabin remove the indicator window and ta e out the lamp.
•In each case remove the appropriate connection plug by pressing down the ring of
the plug screw-joint, at the same time pulling on the connection plug. Figure 6.
12
Remove the
appropriate
connection
plug screw-
joint
Fig. 6
pulling down
the
connection
plug

•With the help of the PA-hose (320023) connect the ball coc with the squeezing
valve.
•Fix the lamp bac in and then the cover.
•On the bac remove the connection plug on the air current unit, there also by
pressing down the ring of the plug screw-joint and at the same time pulling on the
connection plug. Tip: try pressing the ring down with the assistance of a slotted
screwdriver. Figure 7
•With the help of the PU-hose (320054) connect the air current unit with the blasting
material container.
•Please ta e care that the blasting hoses run along under the sieve grille and that
the blasting protector is mounted.
13
Fig. 7
Pulling down the
connection plug
Remove the appropriate
connection plug screw-joint

8 Operation
8.1 General Operating Instructions
All instructions for using the unit, whether in verbal or written form, are based on our own
experience and experimentation and can only be regarded as guidelines.
1. Turn on main switch (green toggle switch).
2. Set the wor ing pressure at the desired level on the reducing valve (at least 2.3 bar
at most 6 bar).
3. Designate the blasting material container by using the selection switch built-in in the
wor room. If you do not possess any add-on tan s, then the green and yellow
settings will not perform any functions. Do NOT select them, since this can lead to
complications.
4. According to the colour selected, ta e the appropriate stylus in your hand.
5. Trigger the blasting process with the foot control.
Due to the operating condition, the amount o blasting media low may
change when the blasting media amount decreases.
By shortly tilting the unit it is possible to continue working or a short time.
However, this is an indication that you have to re ill blasting media.
Female connector power consumption max: 8 A
14

9 Troubleshooting
Fault Cause Solution
Irregular flow of blasting
material
Too little blasting material in
container
Re-fill the container
Jet on stylus too small Use larger jet
Blasting material is moist Use blasting material of correct
dryness
No flow of blasting
material
Container empty Re-fill the container
Main jet and/or steel hose
bloc ed
Use recommended, dry blasting
material. Unscrew jet on the
stylus. Trigger blasting process.
Blasting material should flow. If
necessary, briefly hold the hose
closed to build up some counter-
pressure.
Wrong selection of colour
circuit setting
Please switch to the correct
colour circuit setting
Ancillary jet bloc ed Refer above
Too little pressurised air
< 3 bar
Increase pressure
Decreasing and/or to
low blasting pressure
Filter bloc ed and/or
buc led closed
Change filter element
If the above recommendations do not solve the problem, contact your dental depot
or our service department.
Remarks:
Obstructions normally occur from soiled or lumply blasting medium. If the sand draws
moisture, chec the condensator.
Most obstructions occur inside the nozzle. To remove such obstructions unscrew the
nozzle and clean it. In general this would be sufficient to ma e the stuc grains come
loose. If the obstruction persists, use a needle and push it through the hole.
15

10 Care and Maintenance
10.1 Cleaning
Disconnect the power plug before starting any maintenance wor .
The identification plate has always to be ept in easily legible condition and has
not to be removed.
Remove external dirt from time to time with some form of cold cleaner.
Use only cold cleaners to avoid damaging the paintwor or removing the lettering.
The equipment should be cleaned at regular intervals to ensure trouble-free
operation.
It requires only normal cleaning (sponge, damp cloth, mild detergent) and no further
chemical additives.
•The inside of the chambers and the protection screens can be cleaned with
compressed air. Fine-dust will be suc ed out by the dust-extractor.
•Never use strong and abrasive solvents for cleaning the screens.
•Coarse-grained sand, which cannot be suc ed out by the dust-extractor can be
removed through the discharge opening.
10.2 Maintenance
This unit does not require any special maintenance. Just ma e sure that the device is ept
clean.
However, after using the unit a certain time, it will be necessary to replace some parts.
Please ta e care of the following parts:
16

10.2.1 Sleeve Replacement
Sleeves can also be replaced with gloves. The procedure is the same.
•Loosen the connector with pliers and unscrew the throughgrip (4 screws).
•Pull off the old sleeve and put on the new one so that it completely covers the
opening.
•Attach the new connector. Ta e care that the closing of the connector is placed
inside the notch of the opening.
•Tighten the opening.
10.2.2 Screen Replacement
•Open the flap and loosen the five nurled nuts.
•Remove the guide rail
•Fold the screen to the front and pull it out. Please ta e care of the spacer reels.
•Replace the screen and reassemble everything in reverse order.
10.2.3 Conducting Hose Replacement
Before changing, the mains plug must be disconnected and the pressurised air connection
detached.
The pressure of all the tan s must be released (cf. Installation / Start-up).
•Ta e sieve unit out of the chamber.
•Lay the appliance on its side so that you have access to the bottom of the
appliance.
•In order to detach from the tan the blasting material hose in question, loosen the
blac nut with a no. 17 spanner, then ta e it, and subsequently the hose too, off.
•Pull and/or lever the silver handle on the squeezing valve, with the other hand
pulling the hose through the through-put and into the interior.
•Remove hose protection.
17

•In principle the installation ta es place exactly in the reverse manner. The hose is
pushed from the interior of the chamber through the hole on the squeezing valve,
led through it again and pushed onto the nipple of the tan (don’t forget the nut and
the plastic cap!). Before the nut is tightened the fabric must be completely pulled
over the rubber. Should this be difficult to achieve then push the fabric outwards
from the stylus right to the end until enough fabric is available.
•The nut can then be completely tightened (not with force! Don’t overturn it!).
•The small hose is only to be pushed in up to the squeezing valve. The hose should
be sandwiched in between both of the styluses. It serves as a protection for the
blasting hose.
•Put the appliance bac in an upright position and re-install the sieve grille. Please
ta e care that the blasting hoses run along under the sieve grille and that the hose
protector is mounted.
10.2.4 Lamp Replacement
Before changing it you must pull out the mains plug. The lamp is behind the indicator
window.
•Loosen nurled nuts and ta e off the indicator window.
•Pull the lamp towards the right out of its soc et and in re-placing ma e sure that the
new lamp fits correctly bac into the soc et.
•Put bac the indicator window and tighten the screws.
10.2.5 Nozzle Replacement
Ta e care that the nozzle always corresponds to the size of the used blasting medium.
The replacement is very easy. Simply unscrew the old nozzle and screw on a new one.
Important: Before setting up a new nozzle, shortly operate the unit and blow away old
blasting medium which may remain inside the hose.
18

10.2.6 Protection Filter Replacement
After some time of usage the filter inlet may become clogged. This filter is located in an
aluminum housing (transition piece) directly at the blasting material container.
•Loose the nut at the container with a 17mm wrench.
•Press down lightly the ring inside the connection and remove the hose
•Unscrew and remove the connection.
•Unscrew and remove the transition piece from the blasting material container with
the help of suitable tools.
•Change the transition piece and screw it bac into the blasting material container.
•Screw the connection.
•Reconnect the air tube.
10.2.7 Water Separator
A water separator, that absorbs any condensation coming out of the compressor, is
situated at the bac of the unit. It must be chec ed regularly and at the latest when the
max. level is reached, it must be emptied. To do this, press the yellow discharge lever up
so that the water can flow into the container you have placed under the unit.
Remarks:
Obstructions normally occur from soiled or lumply blasting medium. If the sand draws
moisture, chec the condensator.
Most obstructions occur inside the nozzle. To remove such obstructions unscrew the
nozzle and clean it. In general this would be sufficient to ma e the stuc grains come
loose. If the obstruction persists, use a needle and push it through the hole.
19

10.3 Warranty
The warranty period for our equipment is 12 months. If faults occur within the
warranty period, contact your dental depot or get in touch directly with our service
department.
Your equipment should only be operated in perfect condition. If faults occur which
could harm operators or third parties, the unit should not be used until it has been
fixed.
This warranty does not cover damage caused by improper use, external mechanical
causes, transport damage or interference with the unit by unauthorized persons.
10.4 Scope o Delivery/ Accessories (115 V version)
Incl. in delivery Item no.:
Compressed air hose, PVC hose Ø 8x6 textile (blue) 2 m 320026
Supply line 592012
Gobi-2 incl. 2 fine blasting nozzles, 0.8 (blue), 1.2 (red) 190898
Gobi-3 incl. 3 fine blasting nozzles, 0.8 (blue), 1.2 (red) and
optionally additional tan , left with fine blasting nozzle 0.6
(yellow) or 0.8 (green)
190898 +
item no.
additional tan
Gobi-4 incl. 4 fine blasting nozzles, 0.8 (blue), 1.2 (red) and
additional tan , left with fine blasting nozzle 0.6 (yellow) and
additional tan , right with fine blasting nozzle 0.8 (green)
190898 +
190800 +
190802
Accessories Item no.:
Compressed air hose, PVC hose Ø 8x6 textile (blue) per meter 320026
Additional tan , left with fine blasting nozzle 0.6 mm (yellow) 190800
Additional tan , right with fine blasting nozzle 0.8 mm (green) 190802
Spare fine blasting nozzle 0.6 mm 190550
Spare fine blasting nozzle 0.8 mm 190551
Spare fine blasting nozzle 1.2 mm 190552
Spare sleeve, per piece 190175
We recommend the use of Wassermann blasting materials and our low-
pressure suction units SG-10, SG-1/1 and SG-1/2 D with a long-life brushless
motor and an extra large micro fine dust filterbag.
20