Kernlochbohrer NTS-38/HEPA User manual

Operating instructions
Wet-dry vacuum cleaner NTS-38/HEPA
Kernlochbohrer GmbH
Geigersbühlweg 52
72663 Großbettlingen
Tel. [phone]
E-Mail: [e-mail] Version 0 1. Output 05/2023

Content
Introduction 3
About this guide 3
Note 4
Explanation of symbols 4
Safety regulations 4
Environmental protection 8
Grounding 8
Commissioning 8
Function 9
Innovative car cleaning 10
Cleaning, maintenance and storage 11
Emptying the dust collection container 11
Sensor for liquid level 12
Filter change 13
HEPA filter 13
Service 14
Warranty 15
Problem solving 15
Technical data 16
Packing list 17
Exploded view 18
EC Declaration of Conformity 23
2

Introduction
Thank you for choosing the NTS-38/HEPA wet/dry vacuum cleaner from
Kernlochbohrer GmbH. This is a high quality product based on the latest
technology. We hope that this device is to your satisfaction and meets your
expectations. We are constantly striving to improve our products in our product
segment and will continue to supply the market with new equipment.
Our company declines all responsibility in the event of violations of the operating
instructions that may lead to injuries or machine damage. In addition, all currently
applicable regulations of the Accident Prevention Regulations (UVV) and the
Employer's Liability Insurance Association (BG) must be observed.
If you have any questions about the operation of the wet-dry vacuum cleaner,
please contact Kernlochbohrer GmbH directly. We are available to answer your
questions at any time.
Note:
Kernlochbohrer GmbH reserves the right to change the design and appearance of
the products and their operating instructions. Future changes to the operating
instructions will be made without prior notice.
About this guide
These operating instructions are for the model
NTS-38/HEPA
Check the machine model against the type plate.
3

Note
Read the entire instruction manual carefully before using the wet-dry vacuum
cleaner. Special attention should be paid to the section "Safety precautions".
All spare parts and accessories used with this unit must be specified by
Kernlochbohrer GmbH.
Explanation of symbols
Warning of general danger. Failure to observe these safety precautions and
instructions may result in electric shock, fire and/or serious injury.
Safety regulations
❖Read all precautions before commissioning and keep the operating
instructions. In addition, all currently applicable regulations of the Accident
Prevention Regulations (UVV) and the Employer's Liability Insurance
Association (BG) must be observed.
❖Please follow the operating instructions carefully, as failure to observe these
safety precautions and instructions may cause electric shock, fire and/or
serious injury.
1. Check the appliance, cables and plugs before each use. Only have damage
repaired by a qualified electrician in accordance with VDE.
2. Only insert the plug into the socket when the machine is switched off.
4

3. This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and/or
knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety. Children should be
supervised to ensure that they do not play with the appliance.
4. If the mains connection cable is damaged, the unit must no longer be used.
5. Please ensure that the mains connection cable is not damaged by being driven
over, squeezed, tugged and the like.
6. Couplings of mains connection or device connection cables must be at least
splash-proof.
7. Avoid unintentional starting of the machine. Make sure that the power tool is
switched off before connecting it to the power supply.
8. The unit may only be operated in a room with sufficient ventilation (observe
national occupational health and safety regulations).
9. When vacuuming, observe the applicable safety regulations of the material
manufacturer.
Warning!
10. Do not suck in flammable or explosive liquids (e.g. petrol, alcohol, thinners,
solvents, etc.) - risk of explosion!
Warning!
11. Do not suck in flammable or explosive dusts (e.g. magnesium, aluminium, etc.)
- risk of explosion!
5

Warning!
12. Do not suck in sparks or hot parts (e.g. metal chips, ash, etc.) with a
temperature above 60°C - risk of explosion and fire!
13. Do not suck in aggressive liquids/solids (acids, alkalis, solvents, etc.).
14. The appliance must not be used near flammable gases and substances.
15. Do not operate the unit including accessories if: the unit shows visible damage
(cracks/breaks), the mains connection cable is defective or shows cracks or
ageing, there is suspicion of an invisible defect (after a fall).
16. No liability is accepted for any damage caused by misuse, improper operation
or improper repair.
17. When emptying, cleaning and changing filters, personnel must be protected by
suitable personal protective equipment.
18. There is a risk of electric shock if the appliance earth conductor is not
connected properly. Consult a qualified electrician if you are in doubt as to
whether the socket is correctly earthed. Do not modify the plug supplied with
the appliance. If it does not fit into the socket. Have a suitable socket installed
by a qualified electrician.
19. Note that the voltage must not exceed +/-5% of the nominal voltage. Higher
voltages can cause irreparable damage. Note that higher voltage peaks are not
generated when operating the machine via a generator.
20. Do not use the unit with a damaged cable or plug. If the unit is not working
properly, has been dropped or damaged, is outdoors or has fallen into water.
Make sure it is repaired by a qualified person.
6

21. Do not pull or carry the appliance by the cord, use the cord as a handle or pull
the cord around sharp edges or corners. Do not run over the mains cable of the
vacuum cleaner. Keep the cord away from hot surfaces.
22. Do not pull the plug out of the socket by the cable. Do not hold the plug by the
cable to unplug it.
23. Do not handle the plug or the unit with wet hands.
24. Check the cable and plug regularly for damage. If the cable is damaged, it must
be replaced by a qualified electrician in accordance with VDE to avoid danger.
25. Do not insert any objects into the openings. Do not use the appliance if any
opening is blocked (except when cleaning the filter). Keep the appliance free
from dust, hair and anything else that could obstruct the air flow.
26. Be especially careful when cleaning stairs.
27. Do not use the wet-dry vacuum cleaner without a filter. Replace the filter as
described in the manual.
28. If you use an extension cable, make sure that the cable is suitable for this
machine and that the extension has the same cross-section as the supply line
of the dry vacuum cleaner.
29. Do not modify the unit in its original form.
7

Environmental protection
Raw material recovery instead of waste disposal!
To avoid transport damage, the unit must be delivered in sturdy packaging.
Packaging as well as the unit and accessories are made of recyclable materials.
The plastic parts of the unit are labelled according to the material. This enables
environmentally friendly, sorted disposal via the collection facilities offered.
Only for EU countries
Do not throw power tools in the household waste! According to the European
Directive 2012/19/EU on waste electrical and electronic equipment and its
implementation in national law, used power tools must be collected separately and
recycled in an environmentally sound manner.
Grounding
The hoover must be earthed. Should a malfunction or failure occur, earthing
provides a path of least resistance for electric current to reduce the risk of electric
shock. The hoover is equipped with a cord, with an appliance grounding conductor
and grounding plug. The plug must be plugged into a suitable outlet that is properly
installed and grounded in accordance with all local codes and ordinances.
Commissioning
Put the machine in working position, secure the vacuum cleaner by locking the
steering wheel brakes if necessary.
Before fitting the suction hose with floor nozzle or other optional accessories, check
that all parts are in good condition and have no damage.
8

Connect the floor brush to the 2 straight
pipes. Then connect the hose with the
hose collar to the pipe. Then the hose
can be connected to the adapter via the
hose collar. Finally, the hose can be
connected to the dust extraction
connection on the appliance.
Function
The NTS-38/HEPA is suitable for the suction and separation of dry, non-flammable
dust with an explosion limit value of 0.1mg/m³.
The wet-dry vacuum cleaner is started by the switch.
1. Switch for controlling the engine speed
2. Socket (power connection for power tools, max.
1200W)
3. On/Off switch
ON Switch on
0Switch off
Auto The vacuum starts by the connected
power tool, after stopping the power tool
the vacuum stops with a delay of 7
seconds.
There is an airflow adjustment ring on the handle of
the appliance. By turning the adjustment ring, the
suction power can be set for different needs when
vacuuming.
Note:
When using the power socket on the unit, make sure
that the plug and socket match.
9

Note:
Switch off the appliance until the motor has come to a complete stop.
Always unplug the appliance when working on the appliance or when the appliance
is not working properly.
After starting the wet-dry vacuum cleaner, the dust-laden air is sucked in at high
speed via the suction hose through the inlet valve. The air is slowed down by the
cyclone and the coarse dust particles are separated partly by centrifugal force and
partly by gravity. The air and dust particles then pass through the filter system
where separation takes place. The machine is designed to perform filter cleaning in
the form of automatic cleaning. The separated dust collects in the cyclone until the
machine is switched off, then it falls through the lower opening into the dust
collection tank.
The filter cleaning process is not complete until it is clear that the dust inside the
tank has fallen into the collection tank. In some extreme cases, the dust's stickiness
must be broken manually. This can be done by tapping the dust through the bag or
by carefully tapping the tank, e.g. with a rubber mallet.
Innovative car cleaning
When the hoover is switched on, both filters are cleaned automatically and
alternately. See diagram:
10

In rare cases, the filter may be clogged. In this
case, we recommend deep cleaning the filter:
- To do this, switch on the vacuum cleaner.
- Cover the hose with your hand for approx. 60
seconds.
If the suction power is still poor after this, the filters
must be replaced. See instructions in the chapter
"Changing the filters".
Cleaning, maintenance and storage
Empty and clean the hoover after each use and whenever necessary.
No outside help is required to perform basic maintenance and cleaning. The unit
surface and the inside of the tank should be cleaned regularly with a damp cloth.
•Do not clean the unit with a water hose or a high-pressure water jet (risk of
short circuits or other damage). Do not immerse the motor head in water for
cleaning.
•Empty the dust collection container (see chapter "Emptying the dust
collection container").
•Vacuum the unit and wipe it inside and out with a damp cloth.
Emptying the dust collection container
To avoid excessive contamination of the dust collector, it must be checked
regularly, depending on the type and quantity of material sucked in.
11

Switch off the unit and secure it with the parking brakes on the castors.
Open the buckle on both sides to separate the upper and lower containers, attach
the dust collection bag and remove it from the lower container.
Place a new bag in the lower container and make sure that the holes of the bag fit
into the lower container. Now put the upper container back on the lower container
and close the buckles.
Sensor for liquid level
Remove the dust collection bag when using the NTS-38/HEPA as a wet hoover.
The maximum water collection capacity is 20L. The wet-dry vacuum cleaner stops
automatically when the max. water intake capacity is reached. Then turn the switch
to "0". Then you can remove the upper container, empty the lower container and
put the upper container back on. Then you can continue working
12

Please clean the level sensor probes regularly. It is
important that you keep the probe clean to prevent
the automatic shut-off from working incorrectly or
not at all.
Filter change
When changing the filter, dust hazardous to health may be stirred up. Therefore,
the user should wear protective goggles, protective gloves and a respiratory mask
of protection class FFP3.
Caution!
Remember to switch off the unit and unplug it from the mains socket before
carrying out any maintenance.
HEPA -Filter
Loosen the 2 clamps and remove the cover. Unscrew the middle screw on the
metal strip and remove it. Remove the old filter and insert a new one.
Important:
If you remove the main filter to clean it, be aware that it can be damaged by
compressed air. The filter can be cleaned with water, but avoid cleaning with a high-
pressure cleaner, which can destroy the filter.
13

Service
1. When cleaning and maintaining the machine, you must switch off the machine
and disconnect the machine from the mains supply
2. Avoid cleaning with a high-pressure cleaner. However, if this should happen,
never spray into the suction engine or the opening of the engine cooling
system.
3. Before moving the machine out of the working area, the machine must be
cleaned.
4. All equipment used must be considered contaminated and treated accordingly.
5. If possible, use a specially suitable room for cleaning.
6. Suitable personal protective equipment must always be worn when cleaning the
appliance. Dust can be dispersed when the filter is changed, which can be
hazardous to health. Accordingly, the user should wear protective goggles,
protective gloves and a respiratory mask corresponding to protection class
FFP3.
7. All parts that are contaminated after service must be properly disposed of in
plastic bags in accordance with all regulations.
8. When the machine is used for other purposes, it is extremely important that the
machine is cleaned to avoid the spread of hazardous dust.
9. Do not puncture the filter. Danger of dust dispersion.
14

Warranty
In accordance with our general terms and conditions of delivery, a warranty period
of 12 months applies for material defects in business transactions with companies
(proof by invoice or delivery note). Damage caused by natural wear and tear,
overloading or improper handling shall remain excluded from this. Damage caused
by material or manufacturer defects shall be remedied free of charge by repair or
replacement. Complaints can only be accepted if the device is sent to the supplier
unassembled.
Problem solving
Our wet-dry vacuum cleaner is designed for rough everyday use in construction
and industry. Nevertheless, you must bear in mind that the machine must be
protected from shocks and impacts. Filters, seals, attachments and connections are
carefully adapted and selected to suit the operator's working environment.
Therefore, operators and service personnel must treat the machine with care to
ensure that it works properly for many years.
Note:
For all other problems, please contact our customer service.
Error
Possible cause
Troubleshooting
Engine does not start
No power
Plug in the mains plug
Cable defective
Replace cable
Switch defective
Replace switch
Engine stops
immediately after
starting
Short circuit on cable/machine
Check by electrician according to
VDE
Engine runs, but there is
no intake
Hose not connected
Connect hose
Hose clogged/blocked
Clean hose
No dust bag
Insert dust collection bag
Engine runs, but poor
intake
Hole in the hose
Replace hose
Filter clogged
Replace filter/filter
Loose top cover
Adapt
Defective seals
Replace affected seals
Dust blown from engine
Incorrectly mounted or damaged
filter system
Adjust/replace filters
Abnormal noises
Customer service
15

Technical data
Data
Einheit
NTS-38/HEPA
Voltage
V
230V
Power (max)
kW
1.2
PS
1.7
Current (UL)
A
10
Air flow (max)
m³/h
262
cfm
154
Negative pressure (max)
inch
104
Mbar
250
Number of filters
Piece
2
Filter efficiency
HEPA, >99.5%@0.3 µm
Filter cleaning
Self-cleaning function
Adjustable air flow
Ja
Quick start for power tools
Ja
Tank volume
L
38
Dimensions （L*W*H）
mm
385x500x570
Weight
kg
13,5
16

Packing list
No.
Designation
Number
Specification
1
D35 Hose sleeve 1-vacuum side
1 Piece
2
D35 Threaded clamping head
2 Piece
3
D35 bayonet coupling
2 Piece
4
D35 Antistatic hose
4 metres
5
Air flow adjustment ring
1 Piece
6
D35 Hose cuff 2-grip side
1 Piece
7
D35 reducer
1 Piece
8
Joint nozzle
1 Piece
9
D35 Curved handle
1 Piece
10
D35 Straight handle
2 Piece
D35*450
11
D35 floor brush
1 Piece
L300
12
PE bag
15Piece
13
O-shaped ring
1 Piece
48*3.5
14
Non woven bag
1 Piece
17

Exploded view
NTS-38/HEPA
18

No.
Description
Number
Specification
1
Sling bar
1
2
Hose clamp
4
3
Top cover
1
4
Drive module
1
220V
5
Air bonnet
1
6
PCB of the control module
1
7
Reserve valve assembly
1
220V
8
Central coverage
1
9
Panel
1
10
Inlet cover strand
11
Inlet cover
12
Negative pressure indicator
13
Switch for setting the airflow speed
1
14
Main power switch
1
15
10A output socket
1
16
Rocker switch
1
17
Flange connection
1
18
Air inlet for non-woven bags
19
HEPA filter
2
21
Filter holder
1
22
Elastic cord (Φ4-0,5m)
2
23
Engine cover
1
24
Motor bracket
1
25
single-phase bypass motor
1
230V-1200W
26
Motor damping ring
1
27
118 Engine damping ring
1
28
Mains cable with plug 230V
1
3*1.5 Length 8m
RVV-10A
Connection
29
Hose holder
2
30
Buckle holder
2
31
Sealing ring (Φ6-1,6m)
1
32
Buckle
2
33
Cover plate
1PC
34
Foot pad
0.5M*2
Φ4
19

No.
Description
Number
Specification
1
Dust collection container
1
2
3" universal wheel
2
3
Hexagon socket bolt with half round head
2
M10*40
4
Spring washer
2
M10
5
AC150 axle
1
6
6" rear wheel
2
20