Harnisch+Rieth D-H 22 S User manual
Operating instructions
Machine designation: Manual blasting unit
Machine type: D-H 22 S
Machine no.: .....................................
Keep for future reference!
D-H 22 S - 16.02.2002 / Vers.: 1 1
Dear customer,
Thank you for the confidence you have placed in us by purchasing this manual
blasting unit.
For this unit to be of service to you for many years to come, please take the
time to read these operating instructions carefully, especially before using the
unit for the first time.
Contents
1 Safety .............................................................................................................. 2
1.1 Intended use .......................................................................................... 2
1.2 Possible dangers ................................................................................... 2
1.3 Approved operators ............................................................................... 2
1.4 Safety measures at site of operation ..................................................... 3
1.5 Marking of safety references contained in these instructions................ 3
2 Initial/setting into operation ......................................................................... 4
2.1 Technical data........................................................................................ 4
2.2 Unpacking the manual blasting unit....................................................... 4
2.3 Identification and description of the unit components............................ 5
2.4 Initial/setting into operation procedure................................................... 8
3 Operation........................................................................................................ 9
3.1 Connecting the blasting unit to the compressed air supply ................... 9
3.2 Blasting agents ...................................................................................... 9
3.3 Checking the filter unit ......................................................................... 10
3.4 Automatic deactivation device and filter control lamp.......................... 10
4 Cleaning/maintenance ................................................................................ 11
4.1 Exchanging the filter bag ..................................................................... 11
4.2 Cleaning/exchanging the ultra-fine filter .............................................. 11
4.3 Cleaning the insert sieve (residual embedding materials)................... 12
4.4 Letting out blasting agent..................................................................... 12
4.5 Checking the injector as blasting performance decreases.................. 13
5 Blasting chamber illumination (24 V) ........................................................ 15
6 Electrical fuse protection............................................................................ 15
7 Accessing the electrical/pneumatic control system................................ 15
8 Warranty conditions .................................................................................... 16
9 EC declaration of conformity ..................................................................... 17
2D-H 22 S - 16.02.2002 / Vers.: 1
1 Safety
1.1 Intended use
The D-H 22 S manual blasting unit is intended for use in dental laboratories:
−for removing the residuals of embedding materials and oxides on cast
components after their being unbedded,
−for leveling and smoothing of cast component surfaces and
−for polishing
Unauthorized modifications and additions are not permitted for safety reasons!
The conditions for operating, maintaining and cleaning the unit, as described in
these operating instructions, must be strictly adhered to.
1.2 Possible dangers
The D-H 22 S manual blasting unit is safe when used as intended. However,
when not used properly or with care its use can lead to injuries of eyes or skin
due to the sand blast leaving the injector.
If the front flap is open you should not activate the (removable) injector.
Potential ignition sources should not be suctioned.
Before maintenance work and cleaning, the unit should be switched off and
disconnected from the mains supply (i. e. the mains plug should be pulled).
Before accessing any of the incorporated electric components, the unit should
be disconnected from the mains supply!
1.3 Approved operators
The operator of the machine should make sure that the operating instructions
are accessible to the operating personnel. The operator should make sure that
they have been read and fully understood by the operating personnel. Only
then should they be allowed to operate the machine.
D-H 22 S - 16.02.2002 / Vers.: 1 3
1.4 Safety measures at site of operation
The installation surface should be flat and stable according to the weight of the
manual blasting unit.
Make sure by endorsing appropriated corporate instructions and control
mechanisms that the pin drilling workplace always complies with the pertinent
accident prevention regulations.
Foreign bodies should not be inserted through the ventilation openings of the
unit.
1.5 Marking of safety references contained in these instructions
Note Refers to tips and other particularly helpful pieces of information.
Caution Refers to particular ways of operation or handling, the non-adherence of which
can lead to malfunctioning, damages or other kinds of trouble.
Danger Refers to dangerous situations, in which injuries can occur.
4D-H 22 S - 16.02.2002 / Vers.: 1
2 Initial/setting into operation
2.1 Technical data
Machine designation :Manual blasting unit
Machine type :D-H 22 S
Overall dimensions :Width 450 mm (with plug for foot switch),
Depth 485 mm (with control knob for working
pressure),
Height 600 mm.
Electrical connection :230 volts/50 Hz
Overvoltage category :II
Compressed air connection :max. 10 bar
Power consumption :approx. 50 watts
Electrical fuse protection :2x 2.5 A/T
Blasting chamber
illumination
:2 tubular lamps 18 W/24 V
Compressed air capacity :max. approx. 200 l/min.
Weight :approx. 35 kg.
2.2 Unpacking the manual blasting unit
(See fig. 2, page 6)
1. Take off top box lid.
Note Place the box onto two scantlings or onto a palette so you can remove the two
M8 packaging screws on the bottom side of the box more easily.
2. Remove the two M8 packaging screws.
3. The unit must be lifted out of the box by two people (approx. 35 kg).
4. Check the accessories
−Documentation
−Mains connection cable..........................................................no. 022 SM 500
−Foot switch with cable and plug .............................................no. 022 SM 514
−2 m PVC fabric hose, blue Ø 8.2 x 6 with
insert sleeve for quick-action coupling and
swivel nut...............................................................................no. 022 SM 579
D-H 22 S - 16.02.2002 / Vers.: 1 5
2.3 Identification and description of the unit components
(See figures 1 and 3 on pages 5 and 7)
The D-H 22 S manual blasting unit can be operated with all standard laboratory
polish blasting media and special fused alumina.
The pressure regulator (6) adapts the blasting force to the situation at hand.
The unit is equipped with an automatic blasting agent circulation and a motor-
driven blower suction unit. The ultra-fine filter insert (7) guarantees dust-free
working conditions, in which the resulting dust is collected in disposable filter
bags (14).
Fig. 1: Identification of the unit components
2 Front flap
4 Door to filter
compartment
5 Manometer for
Working pressure
6 Pressure regulator for
working pressure
8 Insert sieve
9 Change filter display
10 Knurled nut for insert
sieve
11 Star grips
12 Main switch
13 Sand outlet lid
30 Hand opening
6D-H 22 S - 16.02.2002 / Vers.: 1
Fig. 2: Identification of the unit components
1 Socket for foot switch 19 Injector holder
8 Insert sieve 31 Suction basket
12 Main switch 33 Front floor compartment
15 Mains connection socket
(230 V/50 Hz)
34 10 screws for front floor compartment
16 Compressed air connection 50 Fuse for transformer (blasting chamber
illumination)
18 Blasting chamber illumination
(24 V)
D-H 22 S - 16.02.2002 / Vers.: 1 7
Fig. 3: Identification of the unit components
2 Front flap 40 Nozzle Ø 63 mm
7 Ultra-fine filter 41 Plastic filter bag connection
9 Change filter display 42 Filter bag cap
10 Knurled nut for insert sieve 43 2 M6 nuts
14 Filter bag 45 Air outlet
17 Strip with long holes 46 Suction motor
18 Blasting chamber illumination
(24 V)
47 Suction compartment
19 Injector holder 48 Wire basket
31 Suction basket 49 Sealing surfaces
33 Front floor compartment 50 Fuse for transformer (blasting chamber
illumination)
34 10 screws for floor
compartment
51 Filter compartment
8D-H 22 S - 16.02.2002 / Vers.: 1
2.4 Initial/setting into operation procedure
(See figures 1 and 2, on pages 5 and 6)
1. Connect unit to compressed air supply (see section “3.1“).
2. Fill with blasting agent (see section “3.2“).
3. Connect foot switch to socket (1) (located during transport in blasting chamber)
4. Establish connection to mains supply (230 V/50 Hz) using the mains supply
connection cable delivered with the unit (socket(15)).
5. Check the filter unit (see section “3.3“).
6. Actuate main switch (12).
Note Switching the unit on at the main switch renders it electrically ready for
operation.
7. Suction is activated. Internal illumination lights up.
8. Adjust working pressure (blasting pressure) at pressure regulator (6) to desired
value.
The working pressure is controlled by manometer (5).
Note The working pressure should not be set to more than 5 bar.
9. The sanding jet (exits the injector) is released by actuating the foot switch.
D-H 22 S - 16.02.2002 / Vers.: 1 9
3 Operation
3.1 Connecting the blasting unit to the compressed air supply
(See fig.2 page 6)
1. Connect the fabric hose delivered with the unit to the compressed air
connection (16).
2. Connect insert sleeve for rapid-action coupling to compressed air supply (max.
10 bar).
Caution The compressed air used must be free of humidity and oil.
In order to maintain trouble-free working conditions, you should connect a
water separator directly in series or at a max. distance of 1m to the unit.
3.2 Blasting agents
(See fig.1 page 5)
At works the unit is design for the following blasting agents:
Type of blasting agent Blasting agent class
Polish blasting medium (Al-oxide) cl. 60 B (120 µm)
EW 60 (250 µm)
EW 80 (180 µm)
Special fused alumina cl. 150 A (150 µm)
Caution The unit is designed for the use of HARNISCH+RIETH blasting agents. We do
not grant guarantee for malfunctioning or damages which result from the use of
other kinds of blasting agents.
1. Open front flap (2).
Note Loosen knurled nut for insert sieve (10). Pull out insert sieve (8) by ¾ so that
you can check the level of the blasting agents more easily.
2. Fill with blasting agent until it is approx. 4 cm below the insert sieve (8).
Caution To avoid malfunctioning make sure that there are no dirt particles contained in
the blasting agent.
3. Insert sieve (8) and slightly tighten by hand with knurled nut (10).
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