Renfert MT plus Manuel utilisateur
MTplus
No. 1803-0000 / No. 1803-4000
303 21-9873
Renfert GmbH • Industriegebiet • 78247 Hilzingen / Germany
Tel. +49 7731 8208-0 • Fax +49 7731 8208-70
MadeinGermany
Bedienungsanleitung
Instruction manual • Mode d´emploi • Istruzioni d’uso
Instrucciones para el servicio • Gebruiksaanwijzing
Instrukcja obsługi • Инструкция по эксплуатации
• • •
MTplus Plaster Trimmer
No. 1803-0000 / No. 1803-4000
ENGLISH
1. Introduction
We are pleased with your decision to purchase an
MTplus. Thetrimmersetsnewstandards with regard
tofunction, performance, safety,and design.
Pleasenote thefollowing information.
2. Application Area
TheMTplus is amodel trimmer designed for use in
dentaltechnology operations to grind plaster models.
It can be employed as either a wet or dry trimmer.
2.1 Ambient conditions
Thedevice may only be operated:
• ininterior areas,
• up to an altitude of 2,000 m above sea level,
• atan ambient temperaturerange between 5- 40ºC
(41- 104ºF),
• at a maximum relative humidity of 80% at 31ºC
(87.8ºF),dropping in a linear mannerto 50% relative
humidity at 40ºC (104ºF),
• atmains power fluctuations where thevoltage
fluctuations do not exceed 10% of the nominal
value,
• overvoltagecategory II,
• at pollution degree 2.
3. Safety Information
Please observe all applicable accident
prevention regulations together with the
following safety notes when trimming:
• Never reach into the grinding wheel while
the unit is connected to the power supply.
Inadvertently starting the unit can result in
injury!
• Always keep long hair, loose or wide
sleeves or other clothing away from the
trimmer. Hair or clothing can be pulled into
and wrapped up on the grinding wheel,
resulting in injury!
• The unit is designed solely for grinding
plaster models. Cancer causing dusts are
released when trimming investment
material.
• Never open the front cover while the motor
is running. The motor safety shutoff will not
stop the grinding wheel immediately.
• Only open the front cover after the grinding
wheel has come to a complete stop.
• Always wear protective eyewear when
grinding.
• Do not reach into the grinding wheel while
it is turning.
• Do not work without the model table
installed and locked („click“). Small parts
or fingers can be drawn into the trimmer,
resulting in serious injury.
• Remove the trimmer table only after the
grinding wheel has come to a complete
stop and the front cover is opened.
Additional notes for dry trimming:
• The extraction must be selected to match
the dust being generated (if necessary,
consult the responsible professional
organization).
• Operating the unit can result in a very high
noise level >>> always wear ear protection.
3.1 Liability Exclusion
Renfert GmbH shall be absolved from all
claims for damages or warranty if:
• The product is employed for any purposes
other than those cited in the operating
instructions;
• The product is altered in any way other
than those alterations described in the
operating instructions;
• The product is repaired by other than an
authorized facility or if any but Renfert OEM
parts are employed;
• The product continues to be employed,
despite obvious safety faults.
4. Commissioning / Operation
First, check to make sure that your mains power
corresponds with the power requirements given
on the trimmer nameplate.
The type of usage wet- (see pt. 4.1 and 4.2) or
dry-trimming (see pt. 4.1 and 4.3) must be
determined prior to use.
4.1 Mounting the Trimmer Disc
Please refer to the trimmer disc instructions (resp. to
pt. 5.1 in this instructions) for the mounting procedure.
Range of application of the discs:
• Klettfix for wet trimming
• Marathonfor wet or dry trimming
• Infinityfor wet trimming
4.2 Wet Trimming
1. Set the unit up near the water source / drain, with
a plaster trap (Fig. 1).
2. Connect the drain hose to the trimmer (Fig. 2).
Turn the drain hose on the connecting branch
counter clockwise and fix with a hose clamp
(Fig. 2b)!
3. Position the trimmer hose in the drain (Fig. 3a/3b).
4. Connect the water hose to the trimmer (Fig. 4a/
4b). Observe the necessary water pressure
(see pt. 8 / technical specifications) !
5. Connect the water hose to a water supply with a
shutofftap (Fig. 5).
6. Open the water supply (Fig. 6a) and check for
leaks (Fig. 6b).
7. Plug the power cord into the wall outlet (Fig. 7).
8. Switch the unit on (Fig. 8).
9. Adjust the water flowrate (Fig. 9).
Attention: the water inlet is closed on delivery.
The MTplus is now ready for use as a wet trimmer.
Generalinformation concerningwet trimming:
• Anadequate water flow is important, particularly
whentrimming with diamond-coated discs.
Overheatingwill damagethe disc.
• Thewater supply shutofftap shouldbe turned off
duringlonger workinterruptions or overnight.
4.3 Dry Trimming
1a. Connect the trimmer to an external extractor
(Fig. 10 illustrates an example using a Renfert
extractionhose and coupling).
Attention !
120-V units in combination with Vortex-com-
pact-extractors should be separately connec-
ted to the mains in order to avoid an over-
charging of the extractor and of the 120 V
electric network (do not use the automatic
start-up!). If the electric network is protected
by fuse of only 15 A, it is necessary to
connect the trimmer and the extractor to
separately protected electric circuits.
Recommendation:
RenfertVortex compact 2L, 230 V No.2924-3000
RenfertVortex compact 2L,120V No.2924-4000
Renfert Vortex compact EC 2L, 230 V
No.2928-0000
>>> With cloth filter No.92924-0005
1b. Connect the trimmer to the central extraction
(Fig. 10 illustrates an example using a Renfert
extractionhose and coupling).
Recommendedaccessories:
• 3 m suction hose with elastic coupling
No.92923-0001
• Elastic coupling only, ø 36 mm
No.92923-0010
2. Openthe frontcover (Fig. 11).
3. Removethe rinsetube (Fig. 12).
4. Close the opening with the blind plug (completely
impress it) from thehardware set (Fig.13).
5. Closethe frontcover (Fig. 11).
6a. For extraction with automatic start-up:
• Connect the trimmer power cord to the
extractor(Fig. 14).
• Set the extractor up for automatic operation.
6b. For extraction without automatic start-up:
• Plug the trimmer power cord into the wall outlet
(Fig. 7).
• Switch on the MTplus (Fig. 8), switch the
extractor on automatic use.
The MTplus is now ready for use as a dry trimmer.
4.4 Conversion from Wet to Dry Operation
1. Disconnect theunit fromthe powersupply (Fig. 7).
2. Shut off the water supply (Fig. 6a).
3. Removethe waterhose (Fig. 4a/4b).
4. Removethe drainhose (Fig. 2).
5. Ifnecessary, remove the unitfrom the wet area an
allow to dry completely.
All remaining moisture must be blown off
with compressed air !
6. Remove the trimmer disc (see pt. 5.1, steps 4 to 7).
7. Clean the area behind the flange first with a wet
andthen with a drycloth (Fig. 25a).Moreover blow
offwith compressed air(Fig. 25b).
8. Once the unit is dry, proceed as described in
Section 4.3.
Partially diamond-coated trimmer discs should be
usedfor dryoperation.
Recommendation:
Renfert Marathondisc, Ø 234 mm No.1803-2000
4.5 Conversion from Dry to Wet Operation
1. Disconnect the unit from the power supply
(Fig. 7 or 14).
2. Removethe extractorhose (Fig. 10).
3. Remove the trimmer disc (see pt. 5.1, steps 4-7).
4. Usinga brush,thoroughly clean thefront cover
and the inside of the housing with an extractor and
a brush (Fig. 26).
5. Remove the blind plug. Should it be difficult, you
can use theAllen key (Fig. 16).
6. Mount the trimmer disc (see instructions for
trimmer discs).
7. Install the rinse tube (Fig. 12).
8. Then, proceed as described in Section 4.2.
4.6 Recommendation for dry or wet trimming
• Dry trimming is not allowed when the MTplus is
equippedfor wettrimming.
• Wet trimming is not allowed when the MTplus is
equippedfor dry trimming.
• Not observing the prior instructions will result in
plasterresidue mixing with waterand hardening toa
difficultto remove crust. Suchresidues particularly
on the back of the trimmer disc can lead to
imbalance.
4.7 Grinding Angle Adjustment (89°-99°)
1. Loosen the knurled nut (Fig. 17).
2. Adjust the grinding angle with the adjusting screw
(Fig. 18).
2a. Adjust the grinding angle roughly with the
adjusting screw (Fig. 18).
If the adjusting screw is turned to the top, the
angle between model table and trimmer disc is of
89°. If the adjusting screw is completely turned
out,the angle between model table and trimmer
disc is of 99°.
2b. Adjustment of the model table roughly with the
adjustingscrew (Fig. 18).The lower borderof the
modeltable should coincidewith the upperborder
of the model-table support (Fig. 19 + 20).
2c. Fine adjustment of the model table at 90° with the
adjusting screw (Fig. 18) and set square out of the
hardwareset (Fig.21).
3. Retightenthe knurled nut (Fig. 17).
4.8 Operation / Trimming
Using both hands, securely set the model on the
trimmer table and press it against the disc (Fig. 22).
5. Cleaning / Maintenance
Attention: A raising of plaster dust in
aerodynamic dead areas when dry trimming
is normal and has no negative influence on
the function or grinding power of the MTplus.
1. Disconnect the unit from the power supply
(Fig. 7 or 14).
2. If necessary, shut off the water supply (Fig. 6).
3. Open and unhook the front cover (Fig. 11 + 23).
4a. For wet trimmer: If necessary, remove the table
(Fig. 30 + 40) and clean with a brush under
runningwater (Fig.24).
Do not remove the grinding table if the front
cover is closed otherwise the trimmer disc
will be damaged !
4b. For dry trimmer: Clean using a vacuum and
brush (Fig. 26). Clean the drain tube and tube
connection(Fig. 27).
5. Reinstall and close the front cover (Fig. 23 + 11).
5.1 Trimmer Disc Replacement
1. Switch the unit off (Fig. 8).
2. Disconnect the unit from the power supply
(Fig. 7 or 14).
3. If necessary, shut off the water supply (Fig. 6a).
4. Openthe frontcover (Fig. 11).
5. Ifnecessary, remove the rinse tube (Fig. 12).
6. Remove theSW4Allenkeyfrom itsholder(Fig. 28).
7. Removethe threadcover, loosenthe centring
screw, and remove the disc (Fig. 31 + 29).
8. Ifnecessary,cleanthe flange(refertoSection 5.2).
9. Place a new disc on the lock pin (Fig. 30).
10. Retighten the centring screw with theAllen key
(Fig. 29).
11. Place the thread cover back on the centring screw
(Fig. 31).
12. Return theAllen key to its holder (Fig. 28).
13. If necessary, replace the rinse tube (Fig. 12).
14. Close thefront cover (Fig.11).
15. If necessary, open the water supply (Fig. 6a).
16. Plug the power cord into the wall outlet
(Fig. 7 or 14).
5.2 Flange Replacement / Cleaning
1. Remove the disc (refer to Section 6.1, steps 1-7).
2. Have the pulling screw andAllen key at hand
>>> see tool kit enclosed (Fig. 32).
3. Screw the pulling screw into the flange (Fig. 33)
>>> The flange may not be removed by hand.
Always use the pulling screw to remove the
flange!
4. Removethe flange(Fig. 34).
5. Removethe pulling screw from theflange.
6. Cleanthe flange and the inside ofthe housing
>>> do not damage the seals !
Recommendationfor cleaning the flange:
RenfertPlaster solvent GO-2011 No.2011-0000
7. Lightly coat the motor shaft and seal with Vaseline.
8. Replacethe flange
>>> Note the engagement groove (Fig. 35).
9. Replace the flange by hand on the shaft (Fig. 36).
10. Reinstall the grinding disc (refer to Section 5.1,
steps9-16).
5.3 Spray Tube Replacement / Cleaning
(Wet Trimmer)
1. Removethe rinse tube (refer to Section5.1,
steps 1-5).
2. Removethe gaskets (Fig. 37).
3. Allow the rinse tube to soak in decalcifying agent
overnight(Fig.38).
4. Reinstall the gaskets and coat them lightly with
Vaseline (Fig. 37).
5. Replace the rinse tube (Fig. 12).
6. Closethe frontcover (Fig. 11).
7. If necessary, open the water supply (Fig. 6a).
8. Plug the power cord into the wall outlet
(Fig. 7 or 14).
5.4 Grinding Table Replacement / Cleaning
1. Switch the unit off (Fig. 8).
2. Disconnect the unit from the power supply
(Fig. 7 or 14).
3. Openthe frontcover (Fig. 11).
Do not remove the grinding table if the front
cover is closed otherwise the trimmer disc
will be damaged !
4. Unlatchandremovethegrindingtable (Fig. 39 +40).
5. Removethe frontcover (Fig. 23).
6. Cleanthe grindingtable and frontcover wit a brush
underrunning water(Fig. 24).
7. Replace and close the front cover (Fig. 23 + 11).
8. Reinstallthe grinding table (Fig. 40).
Make sure the retainers are completely free
of all plaster residue! Make sure the work
table is properly seated on the front cover!
9. Plug the power cord into the wall outlet
(Fig. 7 or 14).
5.5 Switch Cover Replacement
1. Loosenthe fastening screws(Fig. 41).
2. Removethe switch cover and replace itwith a new
one(Art. No.90003-5788).
3. Retightenthe fastening screws.
>>> The MTplus may not be operated with a
defective switch cover!
6. Spare Parts
Please refer to the included spare parts list for the
numbersof replacement and spare parts.
7. Warranty
Providedthe unit isproperly used, Renfertwarrants all
parts of the MTplus for a period of 3 years.
Componentssubject to natural wear(e.g., trimmer
discs) are excluded from this warranty.
Thewarranty is voidedin case ofimproper use, failure
toobserve theoperating, cleaning, maintenance, and
connection instructions, in case of independent
repairsor repairs by unauthorized personnel,if spare
partsfrom other manufacturersare employed, or in
case of unusual influences or influences not in
compliance with the utilization instructions.
Warranty service shall not extend the original
warranty.
8. Technical Specifications
Mainsvoltage: 220 V / 50 Hz
120 V / 60 Hz
Powerconsumption: 1,300 W / 1,7433 hp (230 V)
1,500 W / 2,0115 hp (120 V)
Water consumption, max.: 9 l/min.
Necessarywater pressure: min. 1 bar
at ca. 6 l/min.
Speed: 2,820rpm (230 V)
3,420rpm (120 V)
Connectionpiece diameters forexternal extraction:
36mm
Dimensions(WxHxD): 298 x 318 x 412 mm
Trimmer disc dimensions:Ø 234 mm
Weight: 13.5kg
Soundpressure levelaccord. toDIN 45635-01-KL3,
measuredunder fullload: Lp(A) = 74 dB(A)
K = 4 dB
9. Standard Delivery
1MTplus
1 Inlettube
1 Draintube
1 Tool set
1 Hardwareset
1 Set of instructions, with spare parts list
10. Delivery Versions
No.1803-0000 MTplus, 230 V / 50 Hz
No.1803-4000 MTplus, 120 V / 60 Hz
11. Accessories (not included)
Trimming discs - for wet trimming only:
No.1803-1000 Basic kit:
5Klettfix silicon carbide trimmer
discs (3 x corn 80, 2 x corn 120)
+ support disc
No.1803-1100 Refill kit:
5Klettfix silicon carbide trimmer
discs, corn 80
No.1803-1200 Refill kit:
5Klettfix silicon carbide trimmer
discs, corn 120
No.1803-3000 1 Infinity trimmer disc,
diamond-coated
Trimming discs - for wet and dry-trimming:
No.1803-2000 1 Marathon trimmer disc,
partiallydiamond-coated
Extraction units etc.:
No.2924-3000 Vortex compact 2L, 230 V
No.2924-4000 Vortex compact 2L, 120 V
No.2928-0000 Vortex compact EC 2L, 230 V
No.92924-0003 5 filter bags for Vortex compact
extractors
No.92924-0005 1 cloth filter for Vortex compact
extractors
No.92923-0001 3 m suction hose with elastic
coupling
No.92923-0010 1 elastic coupling only, Ø 36 mm
No.2-0973 1 90° plastic elbow for drain tube
12. Troubleshooting Guide
Fault Possible cause Corrective action
Device fails to
start. xPower supply not established.
xMains fuse faulty.
xFront cover not properly
closed.
xMotor overheated.
xCheck the mains power supply.
xCheck the mains fuse.
xClose the front cover (Fig. 11).
xAllow the motor to cool down, then restart
at the main power switch.
Trimmer disc
wobbles. xDisc is not lying flush on the
flange.
xDisc not tightened sufficiently.
xReinstall the disc according to the direc-
tions. Pay attention that the disc is
mounted exactly on the lock pin
(Fig. 30).
xRemove all deposits from the back of the
disc and from the stopping face of the
flange.
xHand-tighten the disc (Fig. 29).
Excessive noise
while the trimmer
disc is running.
xDisc not adequately tightened. xHand-tighten the disc (Fig. 29), or reinstall,
as required (Sec. 5.1).
Trimmer table
wobbling. xTrimmer table incorrectly
installed. xReinstall the table according to the
directions (Fig. 40).
Wet Trimming:
Fault Possible cause Corrective action
Disc buildup. xWater volume incorrectly
adjusted at the device.
xWater supply not fully open.
xSpray tube plugged.
xInlet strainer plugged.
xInlet water pressure too low.
xIncrease the water volume at the trimmer
(Fig. 9).
xOpen the water supply (Fig. 6).
xClean/decalcify the spray tube (Sec. 5.3).
xRemove the strainer with pliers and clean /
decalcify it.
xThe diameter of the inlet pipe is too small
risp. too many users are connected to a
small pipe >>> Check if water pressure is
at least 1 bar (ask your plumber). If neces-
sary the water pressure can artificially
increased by a domestic water work
(electric pump and pressure tank).
xAsk your plumber.
Water sprays out
of the grinding
opening.
xToo much water.
xWater drainage impeded.
xReduce the water volume at the trimmer
(Fig. 9).
xCheck/properly lay out drain tube >>>
slope (Fig. 3a + 3b).
No rinse water. xWater connection not properly
established.
xSpray tube soiled / calcified.
xCheck the water connection (Sec. 4.2
steps 4-6).
xClean/decalcify the spray tube (Sec. 5.3).
Subject to modification.
Dry Trimming:
Fault Possible cause Corrective action
Disc buildup. xModels are too wet.
xPlaster has a high plastic
content.
xClean the disc with a brush under
running water or with plaster
solvent (Renfert GO-2011 Art. No.
2011-0000).
Excessive dust being
blown out of the
grinding opening.
xExtraction not switched on.
xInsufficient suction.
xExtractor or dust bag full.
xExtractor hose blocked.
xSwitch the extraction on.
xIncrease the suction.
xReplace the dust bag.
xCheck/clean the hose.
4a
5
7
2
4b
6
9
1
3a
8
3b
11
13
15
16
10
12
14
17 18
19
21
24
26
28
20
23
25a
27
22
29
25b
Autres manuels pour MT plus
6
Ce manuel convient aux modèles suivants
2
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Autres manuels Renfert Tondeuse
