HTC GL 270 HD User manual

www.htc-floorsystems.com/support
MANUAL
HTC GL 270 HD
Translation of manual in original language

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.
© 2014 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
Trademark: HTC 270 HD
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 2012 and 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.
The product has been CE labelled in the years 2012. 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 25/06/2012
Daniel Gustavsson
Development Manager
HTC Sweden AB
Kåre Kilgren
Product Manager
HTC Sweden AB

HTC GL 270 HD Table of contents
i
1 Introduction
1
1.1 General ............................................................................
1
1.2 Liability ............................................................................
1
1.3 Manual .............................................................................
1
1.3.1 Safety explanations - explanation of symbols ....
1
1.4 Transportation .................................................................
2
1.5 On delivery ......................................................................
2
1.6 Unpacking the equipment ................................................
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 ............................................................................
5
2.2 Warnings .........................................................................
5
2.3 Notes ...............................................................................
6
3 Machine description
8
3.1 General machine description ...........................................
8
3.2 Description of controls - Control panel ............................
11

Table of contents HTC GL 270 HD
ii
4 Operation
12
4.1 General ............................................................................
12
4.2 Handle setting .................................................................
13
4.3 Access to grinding tools ..................................................
14
4.4 Fitting and replacing grinding tools ..................................
14
4.4.1 Fitting grinding tools ...........................................
15
4.4.2 Changing grinding tools ......................................
16
4.5 Preparations for dry grinding ...........................................
17
4.6 Separating and assembling the chassis and grinding
head ................................................................................
17
4.6.1 Remove the grinding head from the chassis ......
17
4.6.2 Attach the grinding head to the chassis .............
18
4.7 Operation .........................................................................
18
4.7.1 Starting the machine ..........................................
18
4.7.2 Emergency stop switch ......................................
18
4.8 Making operation easier ..................................................
18
4.9 Edge grinder kit (accessory) ............................................
19
4.9.1 Change to Edge Grinder Cover ..........................
20
4.9.2 Fitting the Edge Grinder Adapter ........................
21
4.9.3 Positions for Edge Grinder Adapter ....................
22
4.9.4 Place in the centre position ................................
23
5 Maintenance and repairs
24
5.1 General ............................................................................
24
5.2 Cleaning ..........................................................................
24
5.3 Daily ................................................................................
24
5.4 Every week ......................................................................
24
5.5 Every month (or after 100 hours) ....................................
25
5.6 Repairs ............................................................................
25
5.7 Spare parts ......................................................................
25
6 Troubleshooting
26
6.1 General ............................................................................
26
6.2 The machine will not start ................................................
26
6.3 The machine vibrates or wears the tools unevenly .........
26
6.4 The fuse trips frequently ..................................................
26
6.5 The machine cannot cope ...............................................
27
7 Technical data
28

HTC GL 270 HD Table of contents
iii
8 Environment
30
8.1 Chassis ............................................................................
30
8.2 Grinding head ..................................................................
30
8.3 Electrical system .............................................................
30
8.4 Recycling .........................................................................
31
9 Warranty and CE marking
32
9.1 Warranty ..........................................................................
32
9.2 CE marking ......................................................................
32

Table of contents HTC GL 270 HD
iv

HTC GL 270 HD Introduction
2.0 1
1 Introduction
1.1 General
The machine models in HTC's Greyline series are grinding machines that can be used to
grind, strip and clean all types of floors. The area of application for the machine
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 Liability
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 the descriptions contained in this manual without 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 explanations - explanation of symbols
A number of symbols are used in the manual to highlight the most important sections,
see below. It is important that you carefully read through the descriptions of the symbols
in order to avoid the risk of both material damage and personal injury. There are also
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 a risk of personal injury or material
damage in the event of incorrect use of the machine. If you see this symbol next
to a section of text, you must pay particular attention when reading through the
text and not carry out any operations of which you are unsure. This is for your
own and other users' safety and to avoid damage to the machine.

Introduction HTC GL 270 HD
2 2.0
Note!
This symbol means Note! and indicates a potential risk of material damage in
the event of incorrect use of the machine. If you see this symbol next to a
section of text, you must pay particular attention when reading through the text
and not carry out any operations of which you are unsure. This is to avoid
damage to the machine.
Tip!
This symbol means Tips! and implies the inclusion of tips and advice on
effective use of the machine or ways of reducing wear and tear to the machine.
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. 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. 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 for 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.
• Manual
• Face spanner (for machines with removable tool holder)
• Lock spring tool holder
• Allen key (for machines with adjustable handle)
• Camlock female

HTC GL 270 HD Introduction
2.0 3
1.6 Unpacking the equipment
Warning!
Read carefully through the safety instructions and user manual before using the
equipment.
• Check the packaging and equipment carefully on delivery for any possible
transportation damage. 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.
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)
6. Voltage (V)
7. Current (A)
8. Frequency (Hz)
9. Rotational speed (r.p.m.)
10. Weight (kg)
11. Address field

Introduction HTC GL 270 HD
4 2.0
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.
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 GL 270 HD 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 2,10 Unrestricted
Floor preparation (T-rex) 3,70 14.80 hrs
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28.

HTC GL 270 HD Safety
2.0 5
2 Safety
2.1 General
This chapter contains all the warnings and notes that must be considered for the HTC
GL 270 HD.
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!
Make sure there are no loose objects in the work area. If loose objects get under
the grinding head, these may be flung out and cause personal injury.
Warning!
Use protective equipment as shown on the labelling in the machine.
Warning!
Always make sure that a dust extractor is connected to the grinder during dry
grinding to prevent, as far as possible, exposing the operator, 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.
Warning!
Read through the safety instructions and the manual carefully before use.
Warning!
Always use hearing protection when using the machine.

Safety HTC GL 270 HD
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!
Do not clean the machine using a high-pressure washer. Otherwise, moisture
may penetrate electrical elements and damage the machine's drive system.
Warning!
Always ensure that the machine's connection cable is hanging freely without
any tensile loading. Otherwise, the cable, coupling socket and plug may be
damaged, which can cause both physical damage and personal injury.
Warning!
Always ensure that the machine's handle is in the upright position when the
machine is tipped to enable access beneath the grinding head. Otherwise, there
is a risk that the machine could fall back and cause personal injury.
Warning!
The lifting handles on the motor are intended for lifting the grinding head,
when it is separated from the chassis, and then only for short, low lifts, e.g. into
the boot of a car. The lifting handles are not to be used for lifting the complete
machine.
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 must be connected to an earth fault breaker suitable for electronic
frequency convertor operation.

HTC GL 270 HD Safety
2.0 7
Note!
The machine may only be used to grind, strip and clean floor coverings and
other materials that are stated in this manual or materials that are recommended
by HTC.
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 may only be lifted using the lifting eye on the chassis in
accordance with the relevant instructions.
Note!
Make sure that the floating cover can move freely within its movement margins
and that the cover rests on the floor before starting the machine.
Note!
The machine should be stored in a dry, warm (plus degrees) location when not
in use. 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. 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!
Check that all the parts are correctly attached and that all the screws are
tightened properly before the machine is started.

Machine description HTC GL 270 HD
8 2.0
3 Machine description
3.1 General machine description
The machine is constructed from a number of main components, see Figure3-1, page
9and Figure3-2, page10. For each machine model in the series, there are a
number of different motor alternatives, see tables in Technical data, page28.
The machine is based on a wheeled chassis. The motor with the rotating grinding unit is
mounted on the lower part of the chassis enabling some movement between the chassis
and the motor assembly.
The machine is equipped with a lifting eye on the chassis and two lifting handles on the
grinding head, see Figure3-1, page9. The lifting eye is intended for lifting the
complete machine. The lifting handles are intended for lifting the grinding head, when it
is separated from the chassis, and then only for short, low lifts, e.g. into the boot of a
car. The lifting handles are not to be used for lifting the complete machine.
The handle can be placed in a number of different working positions by loosening the
locking mechanism for adjusting the handle (see Figure3-2, page10) and moving the
handle up and down to the desired working height. The angle of the handle (see
Figure3-2, page10) can also be adjusted to obtain the best ergonomics. The handle
can also be placed in the upright position, which must be used when the machine is
tipped to enable access under the grinding head, e.g. when changing tools.
The machine has a connection for an external suction hose, which is used during dry
grinding.
The machine can be easily equipped with a large number of tools, depending on the
material to be ground. For the different tools, see HTC's Product Catalogue under the
Grinding Guide tab.

HTC GL 270 HD Machine description
2.0 9
Figure 3-1. The front of the machine
1. Control cabinet
2. Lifting eye for the machine
3. Plug
4. Motor
5. Lifting handles for grinding head
6. Floating grinding cover
7. Wheels
8. Suction hose
9. Connection for vacuum
10. Quick release coupling motor cable

Machine description HTC GL 270 HD
10 2.0
Figure 3-2. The machine's rear
1. Control panel
2. Adjustable handle
3. Connection for vacuum
4. Locking mechanism for handle adjustment
5. Locking bolts/quick release grinding head

HTC GL 270 HD 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. O/I- Start/stop the machine. Turn the knob to "I" to start the machine. Hold the
knob in the start position "I" for ca 1-2 seconds.
Unloaded start is recommended, which can be done by lifting the grinding
head from the surface.
Turn the knob to "O" to switch off the machine.
2. Warning lamp start capacitor protection - The lamp lights when the start
knob as been in the start position too long, or in the case of repeat short
attempts to start.. Normally, the lamp goes out automatically after 2 minutes.
3. EM-Stop - Emergency stop switch: In an emergency, press the switch to cut
the power to the machine. Reset the emergency stop switch by turning it 45°
clockwise.

Operation HTC GL 270 HD
12 2.0
4 Operation
4.1 General
The following section describes how to change tools and how to operate the grinding
machine. This section does not deal with the technical aspects of grinding, such as
selection of grinding tools, etc.
For choice of tool, go to HTC's website www.htc-floorsystems.com for more
information.
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 and follow the relevant fire safety regulations
when using the machine.
Warning!
Make sure there are no loose objects in the work area. If loose objects get under
the grinding head, these may be flung out and cause personal injury.
Warning!
Use protective equipment as shown on the labelling in the machine.
Warning!
Only start the machine with the grinding head lowered.
Warning!
The machine must only be used and moved on level surfaces. There is a risk of
crush injuries if the machine starts to roll.
Warning!
The operator must never leave the machine unattended.
Warning!
The lifting handles on the motor are intended for lifting the grinding head,
when it is separated from the chassis, and then only for short, low lifts, e.g. into
the boot of a car. The lifting handles are not to be used for lifting the complete
machine.