HTC 270 EG User manual

HTC 270 EG
MANUAL
GB
Translation of manual in original language

HTC 270 EG

Contact Information
HTC Sweden AB
Box 69
SE-614 22 Söderköping - Sweden
Tel: [phone]
Fax: [phone]
You can find addresses for our retailers and service partners on our website:
www.htc-floorsystems.com
Always specify the model and serial number when asking questions about your product.
Trademarks
HTC is a trademark owned by HTC Sweden AB. Other names and products mentioned
in this manual may be registered trademarks owned by the relevant companies.
© 2011 HTC Sweden AB. All rights reserved.

EC Declaration of conformity
Manufacturer: HTC Sweden AB
Box 69
SE-614 22 Söderköping
Sweden
[phone]
Type of equipment: Grinding machine
Make: HTC
Model: HTC 270 EG
Year of manufacture: See machine name plate
Serial number: See machine name plate
As the manufacturer, we hereby declare under our sole responsibility that the above
product with serial numbers from 2011 onward conforms to the applicable regulations
in directives MD 2006/42/EC, EMC 2004/108/EC and LVD 2006/95/EC. The following
standards have been used as a basis: ISO 5349-1:2001, ISO 5349-2:2001, ISO
20643:2005, ISO 3741.
This product was CE-marked in 2011. The technical documentation is available from
the manufacturer.
Original of the EC declaration of conformity (Swedish). Other languages are
translations of the original of the EC declaration of conformity.
Söderköping 06/04/2011
Peter Lundgren
Development Manager,
HTC Sweden AB
Kåre Kilgren
Product Manager,
HTC Sweden AB

HTC 270 EG Table of contents
i
1 Introduction 1
1.1 General Information ......................................................... 1
1.2 Responsibility .................................................................. 1
1.3 Manual ............................................................................. 1
1.3.1 Safety Instructions – Explanation of Symbols .... 1
1.4 Transportation ................................................................. 2
1.5 On delivery ...................................................................... 2
1.6 Unpacking the machine ................................................... 3
1.7 Machine name plate ........................................................ 3
1.8 Handling and storage ...................................................... 4
1.9 Vibration and noise .......................................................... 4
1.9.1 Hand and arm vibrations .................................... 4
1.9.2 Sound power level .............................................. 4
2 Safety 5
2.1 General Information ......................................................... 5
2.2 Warnings ......................................................................... 5
2.3 Notes ............................................................................... 6
3 Machine description 9
3.1 General machine description ........................................... 9
3.2 Description of controls – Control panel ........................... 11
3.3 Lifting the machine .......................................................... 12

Table of contents HTC 270 EG
ii
4 Usage 13
4.1 General Information ......................................................... 13
4.2 Handle settings ................................................................ 14
4.3 Access to grinding tools .................................................. 15
4.4 Fitting and replacing grinding tools .................................. 16
4.4.1 Fitting grinding tools ........................................... 17
4.4.2 Changing grinding tools ...................................... 19
4.5 Fitting extra weights ........................................................ 19
4.6 Preparations for dry grinding ........................................... 21
4.7 Preparations for wet grinding .......................................... 21
4.8 Operation ......................................................................... 22
4.8.1 Standby .............................................................. 22
4.8.2 Emergency stop switch ...................................... 23
4.8.3 Starting the machine .......................................... 23
4.8.4 Overload ............................................................. 23
4.9 Adjustment of grinding head ............................................ 24
4.9.1 Adjustment of grinding head against walls ......... 24
4.9.2 Setting the grinding head position ...................... 24
4.9.3 Adjusting the machine before and during
grinding ............................................................... 26
4.10 Transportation ................................................................. 29
5 Maintenance and repairs 30
5.1 General Information ......................................................... 30
5.2 Cleaning .......................................................................... 30
5.3 Daily ................................................................................ 30
5.4 Every week ...................................................................... 30
5.4.1 Check and cleaning of belt ................................. 31
5.5 Every month (or 100 hours) ............................................. 32
5.6 Repairs ............................................................................ 33
5.7 Spare parts ...................................................................... 33
6 Faultfinding 34
6.1 General Information ......................................................... 34
6.2 The machine will not start ................................................ 34
6.3 The machine vibrates or wears the tool unevenly ........... 34
6.4 The machine is grinding at an angle ............................... 34
6.5 The machine stops immediately after starting ................. 35
6.6 The fuses trip frequently .................................................. 35
6.7 The machine cannot cope ............................................... 35

HTC 270 EG Table of contents
iii
7 Electronic error codes 36
7.1 General Information ......................................................... 36
7.2 Schneider Electric ATV12 ................................................ 36
7.2.1 Resetting the frequency converter ..................... 36
7.2.2 Checking the last error code .............................. 37
7.3 Schneider Electric ATV312 .............................................. 37
7.3.1 Resetting the frequency converter ..................... 38
7.3.2 Checking the last error code .............................. 38
8 Technical data 40
9 Environment 44
10 Warranty and CE marking 45
10.1 Warranty .......................................................................... 45
10.2 CE marking ...................................................................... 45

Table of contents HTC 270 EG
iv

HTC 270 EG Introduction
2.0 1
1 Introduction
1.1 General Information
HTC 270 EG is a grinder that can be used to grind, strip, clean and polish concrete,
unhewn stone and terrazzo as well as wood floors. The machine's area of application
depends on the choice of tool.
Read the manual carefully, so you are totally familiar with the machine before you start
to use it. Contact your local retailer for further information. For contact information, see
Contact Information at the start of the manual.
1.2 Responsibility
Even though every effort has been made to make this manual as complete and accurate
as possible, we bear no responsibility for incorrect or missing information. HTC
reserves the right to change descriptions in this manual without giving prior notice.
This manual is protected by the Copyright Act and no part of it may be copied or used
in any other way without the written approval of HTC.
1.3 Manual
In addition to the general functions, this manual deals with the areas of application and
the maintenance of the grinder.
1.3.1 Safety Instructions – Explanation of Symbols
A number of symbols are used in the manual to highlight the most important sections,
see below. In order to avoid both personal injury and material damage as far as possible,
it is extremely important to read and understand the text next to these symbols
particularly carefully. There are other symbols indicating practical tips. These are to
help you use the machine in the easiest and most effective way.
The following symbols are used in the document to indicate where special attention is
needed.
Warning!
This symbol means Warning! and indicates that incorrect use can result in
material damage to the machine or accessories. If you see this symbol next to a
section of text, you must be particularly careful when reading through the text
and not carry out any stages of which you are unsure. This is for your own and
other users' safety and to avoid damage to machinery or other equipment.

Introduction HTC 270 EG
2 2.0
Note!
This symbol means Note! and indicates that material damage can occur if the
machine or its accessories are used incorrectly. If you see this symbol next to a
section of text, you must be particularly careful when reading through the text
and not carry out any stages of which you are unsure. This is to avoid damage
to the machine or other equipment.
Tip!
This symbol means Tip!and indicates that you can get tips and advice on ways
to make operating your machine or associated equipment easier, and to avoid
wear. If you see this symbol next to a text, you should read through the text to
make your work easier and to extend the service life of the machine.
1.4 Transportation
Always make sure that the grinder is securely anchored to its surroundings and the
grinding head is lowered against the surface.To prevent the machine from being
damaged while it is secured, make sure that a spacing block is placed as support, see
Transportation, page29. Make sure that the securing straps or other equipment used
for anchoring during transport are tightened over non-moving parts, e.g. the grinder's
chassis.
When lifting the grinder, lifting straps must be used. These must be attached
well-secured in the lifting eyes provided, , position 2, Figure3-1, page9. Only use
lifting straps approved for lifting equipment.
Do not transport the grinder on sloping surfaces, e.g. loading ramps, without securing it
by the lifting eyes, , position 2, Figure3-1, page9for example with a winch. This is
a safety measure in case the grinder starts to roll out of control. Also make sure that
people (including operator) in the vicinity are at a safe distance in order to prevent
personal injury, in the event that the grinder starts to roll out of control.
1.5 On delivery
The following items are included in the delivery. Contact your retailer if anything is
missing.
• Grinding machine
• Manual disc
• Locking key for control cabinet
• Hammer EZ system

HTC 270 EG Introduction
2.0 3
• Gloves
• HTC Cap
1.6 Unpacking the machine
Warning!
Read through the safety instructions and the manual carefully before use.
• Check carefully to see if the packaging or machine has been damaged during
delivery. If there is any sign of damage, contact your retailer and report it. Report
packaging damage to the transport company as well.
• Check that the delivery matches the order. If there are any discrepancies, contact
your retailer.
• When lifting the grinder, lifting straps must be used. These must be attached
well-secured in the lifting eyes provided, , position 2, Figure3-1, page9.
Only use lifting straps approved for lifting equipment.
1.7 Machine name plate
The machine name plate provides the following information. The model and serial
number must be specified when ordering spare parts for the machine.
Figure 1-1. Machine name plate
1. Model
2. Model number
3. Serial number
4. Year of manufacture
5. Power (kW)

Introduction HTC 270 EG
4 2.0
6. Voltage (V)
7. Current (A)
8. Frequency (Hz)
9. Rotational speed (r.p.m.)
10. Weight (kg)
11. Address field
1.8 Handling and storage
The machine should be stored in a heated, dry area when not in use. Otherwise, it may
be damaged by condensation and cold.
When lifting the grinder, lifting straps must be used. These must be attached
well-secured in the lifting eyes provided, , position 2, Figure3-1, page9. Only use
lifting straps approved for lifting equipment.
1.9 Vibration and noise
Warning!
Always use hearing protection when using the machine.
1.9.1 Hand and arm vibrations
Hand and arm-weighted vibration level [m/s²] for HTC 270 EG have been measured
using equipment approved in accordance with ISO 5349-1:2001. Measurement
uncertainty for the measuring equipment is given as +/- 2%.
The machine has been tested in accordance with ISO 5349-2:2001 and ISO 20643:2005
in order to identify the operations that contribute to the most frequent vibration
exposures. At vibration levels > 2.5 m/s², the exposure time should be limited in
accordance with the table below. For vibration levels > 5 m/s², immediate measures
must be taken by the employer to ensure that the exposure time does not exceed the
time specified in the table below.
Identified work conditions Measured values [m/s²] Daily permitted exposure
(number of hours)
Grinding/polishing 3.92 13
Floor preparation (T-rex) 3.75 14.2
1.9.2 Sound power level
This machine is tested for noise in accordance with ISO 3741 . For information on the
sound power level, see the table in chapter Technical data, page40.

HTC 270 EG Safety
2.0 5
2 Safety
2.1 General Information
This chapter contains all of the warnings and observations that should be taken into
consideration for HTC 270 EG.
2.2 Warnings
Warning!
The machine may only be used or repaired by personnel who have received the
appropriate theoretical and practical training and who have read this manual.
Warning!
Never use the machine in an environment where there is a risk of explosion or
fire. Familiarise yourself with the fire-protection instructions for the working
area and follow them.
Warning!
Secure the area around the machine. No unauthorised persons should be within
a 15-metre radius of the machine. If loose objects get under the grinding head,
these may be flung out and cause personal injury.
Warning!
Use safety equipment such as safety shoes, safety glasses, protective gloves, a
mask and hearing protection.
Warning!
Always make sure that a dust extractor is connected to the grinder during dry
grinding to prevent exposing as far as possible operators, people in the vicinity,
the grinder and other equipment to dust particles. Exposure to dust particles can
cause personal injury and also damage to physical equipment.
Warning!
Only start the machine with the grinding head lowered. The rotating disc must
be touching the floor and the right tool must be fitted.
Warning!
Read through the safety instructions and the manual carefully before use.
Warning!
Always use hearing protection when using the machine.

Safety HTC 270 EG
6 2.0
Warning!
During grinding, the tools become very hot. Tip the machine back and allow it
to stand for a short while. Use protective gloves when removing the tools.
Warning!
Disconnect the electrical supply when cleaning, changing tools or repairing the
machine.
Warning!
The machine may only be used and moved on horizontal surfaces. There is a
risk of crush injuries if the machine starts to roll.
Warning!
The machine must be connected to a residual current device.
Warning!
Do not clean the machine using a high-pressure washer. Otherwise, moisture
may penetrate electrical elements and damage the machine's drive system.
Warning!
The grinding head must not be loaded with any other weights in addition to the
intended extra weights. Do not under any circumstances stand on the grinding
head. Too high a loading can cause the grinding head to fail.
Warning!
When using tools with few points of contact with the surface, e.g. single
segment tools, there is a risk that the ground surface will not be even. For this
reason, such tools should be used with care and only when a roughly ground
surface will not spoil the finished result after grinding.
Warning!
When working on an elevated surface where there is a risk of falling, the edges
of the surface must be secured. The values for the machine's thrust and load
capacity as well as the driving speed are given in the table for the machine's
technical data in the chapter "Technical Data".
2.3 Notes
Note!
The machine may only be used to grind and polish natural stone, terrazzo,
concrete, wood, or other materials stated in this manual or that are approved by
HTC.

HTC 270 EG Safety
2.0 7
Note!
Only original tools and spare parts from HTC may be used for the machine.
Otherwise, neither the CE marking nor the warranty will be valid.
Note!
For the CE marking to be valid, the instructions in this manual must be
followed.
Note!
The machine must only be lifted using the lifting eye intended (position 2 in
Figure3-1, page9) for the purpose in accordance with the relevant
instructions.
Note!
The machine should be stored in a dry, warm (plus degrees) location when not
in use.
Note!
If the machine is stored in a cold area (below zero), it must be kept in a warm
area (above zero) for at least two hours before use.
Note!
When dry grinding, a suitable dust extractor should be used. For available
models of dust extractors, go to HTC's website www.htc-floorsystems.com for
more information.
Note!
The dust extractor's suction hose must be connected to the appropriate socket
on the machine. Adjust the dust extractor to match the grinder's capacity.
Note!
Do not use the emergency stop switch to stop the machine, except in
emergencies.
Note!
As long as the emergency stop switch is pressed in, the machine cannot be
started. Reset by turning the switch 45° clockwise so that it pops out again. The
machine can then be restarted.
Note!
After removing glue and wet grinding, always lift up the grinding heads so that
they do not stick to the floor and damage machine components and the floor
when restarting.

Safety HTC 270 EG
8 2.0
Note!
Only use cold water with no chemical additives.
Note!
During transport, the machine must be secured for transport according to
section Transportation, page29. Always place a spacing block under the
grinding head during transport to prevent the machine cracking.

HTC 270 EG Machine description
2.0 9
3 Machine description
3.1 General machine description
The machine is a grinder for floors, and it is specially adapted for grinding the floor
surface bordering on walls or other permanently installed equipment. The machine is
constructed with a grinding head that is suitable for grinding under radiators, shelves or
other projecting furnishings. The machine has adjustment options and functions for
easily obtaining the best possible grinding result.
The machine can be easily equipped with a large number of tools, depending on the
floor material to be ground. For other tools, go to HTC's website
www.htc-floorsystems.com for more information.
Figure 3-1. The front of the machine
1. Grinding head
2. Lifting eye
3. Chassis
4. Knob for adjusting grinding head
5. Adjustable handle
6. Handle for forward working position

Machine description HTC 270 EG
10 2.0
7. Suction hose
8. Lever for adjusting grinding head
9. Locking pin position grinding head
10. Rotatable floating grinding cover
Figure 3-2. The machine's rear
1. Connection for vacuum
2. Control panel
3. Locking handle position
4. Electrical connection
5. Water connection
6. Control cabinet

HTC 270 EG Machine description
2.0 11
3.2 Description of controls – Control panel
The picture below shows the machine's control panel:
Figure 3-3. Control panel
1. Power - Standby indicator: Indicates that the machine's functions have been
activated. Lights up when the Power knob (7) is turned to "I".
2. Overload - Overload indicator: Lights up to indicate that the machine is using
too much power. If this is ignored, the power supply to the motor will be
interrupted and an error code generated.
3. REW -Rewind: Turn the Grinding knob (5), to "REW" to start the machine's
grinding disc.
4. FWD- Forward: Turn the Grinding knob (5), to "FWD" to start the machine's
grinding disc.
5. Grinding - "Reset" (3) and "FWD" (4) knob.
6. Speed - Rotation speed: Regulates the rotational speed of the machine’s
grinding disc.
7. Power - Start/stop the machine's functions: Turn the knob to "I" to activate the
machine's functions and to prepare for start. Turn the knob to "O" to switch off
the machine's functions.
8. EM-Stop - Emergency stop switch: In an emergency, press the switch to cut
the power to the machine.

Machine description HTC 270 EG
12 2.0
3.3 Lifting the machine
When lifting the machine, lifting straps are used that fasten in the lifting eyes on the
chassis, see Figure3-4, page12. Only use straps approved for lifting equipment.
Figure 3-4. Lifting the machine