StrongBond VFG-75E User manual

Operation Manual
Strongbond Vacuum Cleaner
Model：VFG-75E
Flooring Wholesale Limited
T/A Look Floors
9 Industry Road,
Penrose, Auckland 1061,
New Zealand

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Safety Precautions
WARNING! Read all instructions. As with all machinery there are certain hazards involved
with operation and use of the machine. The following basic safety precautions should be
followed at all times to reduce the risk of fire, electric shock and serious personal injury to
you or others. Keep these important operating instructions with this product.
Must read this operating manual carefully before usage.
Warning symbol
Operators must do not carry out the designated operating steps
Operator must read the designated operating steps before usage.
Safety precautions
People who do wiring and inspecting must have the professional experience and expertise.
The power lines must not be placed at the place where workers can easily step on; once
some damages found on the power lines, they must be replaced with new ones. .
Must use the power cord originally installed in the machine; please contact the
manufacturer in case of extending the power line.
Do not do wiring in a humid environment or with wet hands.
Be sure the power plug has ground wire and the power socket has circuit breaker
Please plug out if don’t use the machine for a long time. Otherwise, it will reduce the
insulating property and lead to electric shock, electric leakage or fire accident.
Do not climb, stand or place stuffs on the machine during its running
Do not try to repair or refit the machine personally if something wrong goes with it; please
contact the manufacturer for discussing and choosing the best maintenance solution
Suggest using the original filter cartridge or bag if needed.
This operating manual should be placed with an unbroken condition near to the machine
for the convenience of reading by the operator.
Please cut off the powder before the overhauling.
The casters must be in the state of being stopped before the machine runs.
This vacuum must not be plugged in the socket that other electric equipment are using,
just in case of fire accident or electric shock due to the overloaded current.
The machine cannot suck up the kind of oily or flammable and combustible smoke dust.
Never leave tool running unattended. Turn power“off”. Do not leave tool until it comes
to a complete stop.

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CONTENT
1 Product Information.................................................................................................4
2 Working principle ....................................................................................................4
2.1 Filtering process................................................................................................4
2.2 Cleaning process of Filter.................................................................................5
3 Product structure and characteristics .......................................................................5
3.1 Exterior Structure..............................................................................................6
3.2 Manual Filter Cleaning Structure......................................................................6
3.3 Filtration System...............................................................................................6
3.4 Dust Collection Bag..........................................................................................8
3.5 Pressure Relief Valve........................................................................................8
3.6 Control Box.......................................................................................................8
3.7 Turbine..............................................................................................................8
6 Operations…………………………………………………………………………9
4.1 Manual Air-pulse back Operation.....................................................................9
4.2 Operation of the Control Board ........................................................................9
4.3 Operation of Dust Cleaning……………………………………………….....10
4.4 Operation of Pressure Relief Valve……...…………...…………………...…12
5 VFG-75E Circuit Diagram.....................................................................................14
6 Routine maintenance and inspection .....................................................................15
6.1 Daily maintenance ..........................................................................................15
6.2 Troubleshooting and elimination method .......................................................15
7 Technical Parameter...............................................................................................16
8 Main Parts List.......................................................................................................17
9Machine Warranty..................................................................................................19

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1 Product Information
VFG-75E Vacuum cleaner is designed for the floor grinding and polishing industry
for superfine dust collection. The characteristics of the machine include strong suction,
two-stage filter units, stable and reliable, space saving, flexible mobility and easy
operation. It is a three-phase machine that is compatible with diamond surface
grinders and other floor grinding & polishing machines. It provides 24 hours
continuous superfine dust suction and collection.
2 Working principle
2.1 Filtering process
The filter unit consists of one unit of a star shaped pre-filter and two units of HEPA
filter cartridges. Under the action of the turbine blower, the dusty air will enter the
pre-filter first. Directly the bigger particles will drop down to the bottom, whereas the
superfine dust will go through the pre-filter and into the HEPA filter cartridge units.
The clean air will come out from the air outlet and leaving the superfine dust behind
which attaches to the HEPA filter cartridges.
Fig. 2.1 Filtering process
Dusty Air
Dust Collection
Purified Air

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2.2 Cleaning process of Filter
The pre-filters can be cleaned from outside the barrel by the Jet pulse negative pressure.
Before the cleaning process, block the air inlet first, then pull the vibration lever over
and over again. The HEPA filter cartridges should be cleaned regularly depending on
usage. To clean the HEPA filter, take it out of the machine and tap the dust out. It is
important to clean the filters to ensure the effective cleaning of the machine and to
prolong the life of the machine
Dust Collection
Manual air pulse system
3 Product structure and characteristics
Main parts
Fig. 2.2 Dust cleaning process

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3.1 Exterior Structure
VFG-75E industrial vacuum cleaner has a simplified design that gives excellent heat
dissipation to the turbine. The prominent advantage of this model is the use of a
designed continuous packing bag to collect the dust, which largely decrease the volume
and weight, so that it could be easy for using. The main body adopts the SPCC metal
plate with thickness of 2 mm. This ensures good endurance and heat resistance for the
whole machine and thereby guarantees the structural strength. In addition, the metal
plates are cut by laser cutting machine that greatly improve its size accuracy. For the
machine surface preparation, we adopted the process of spraying and high temperature
baking that provides a shining surface and a beautiful appearance with durability.
图3.1 主要部件介绍
Fig. 3.1 Main Parts
Upper Cover
Filter bag
Barrel
Air Inlet
Long tube Plastic bag base
Dust Collection
8 inch wheel
PU Hose
Manual air pulse back
device
Bend pipe handrail
Filter Cartridge
Turbine
U shape base parts
4 inch wheel with
brake

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3.2 Manual Filter Cleaning Structure
.
3.3 Filtration System
VFG-75E vacuum has two-stage filtering units. The first stage will be the Anti-static
Filter cartridge which can filter the dust particle size of 3.0μm with filter efficiency up
to 99%. The secondary stage is the cartridge filters with polyester fiber material which
is imported from Toray Industries in Japan. This cartridge filter coated with PTFE film
can ensure the filter efficiency up to 99% for dust particle size of 0.3μm. This kind of
cartridge filter can effectively clean the PM2.5.
Fig. 3.4 –Filter Bag
Fig. 3.2 Filter cleaning
structure
Fig. 3.4 –Cartridge Filter
VFG-75E is installed with a mechanical airflow
reversing structure that conforms to the ergonomic
design. Such unique manual filter cleaning system can
effectively clean the dust accumulated on the surface
of the filter cartridge over time. The user could easily
clean up the filter cartridge according to the job
requirements. It is a very cost-effective and handy
design.

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3.4 Dust Collection Bag
3.5 Pressure Relief Valve
Fig. 3.6 Pressure Control Valve
3.6 Control Board
.
3.7 Turbine
Fig. 3.5 dust collection bag
VFG-75E uses the continuous packing bag
that could be hooked and buckled up on a tube
base that can be easily fixed on the dust outlet.
The continuous packing bag is a foldable long
tube plastic bag that can be pulled out
continuously.
Fig. 3.7 Control Board
Fig. 3.8 Turbine
This pressure relief valve in the vacuum is
specially designed to prevent the turbine from
being burnt out when the vacuum overheats. If
the pressure inside the vacuum reaches to that
set in the valve, it will automatically open the
valve to release the pressure to protect the
turbine. At the same time, it cools off the
turbine.
The turbine in the VFG-75E vacuum has the international
advanced technology of precision casting aluminum alloy.
It completely conforms to the standard of IP54 and F
insulation level. In addition, it has high voltage with
double frequency and provides 24 hours continuous work
and strong suction.
VFG-75E uses IP65 electric control board.
The control board is waterproofed,
dustproofed, anti-impact, insulated with
plastic screws to prevent rust formation. The
pressure gauge reads real-time pressure.

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4Operations
4.1 Manual Air-pulse back Operation
Close the inlet using the block plate on air inlet, let the machine build up vacuum for a
few seconds and then pull the rod repeatedly. The filter will be pulsed sequentially by a
sudden burst of air from the flow-back air inlet. This mechanical filter cleaning process
ejects all the dust from the surface of the filter, allowing for a very effective dust
cleaning result.
4.2 Operation of the Control Board
Just simply connect the three-phase four-wire system of the machine, then it can
be used.
Sealed and static
Half pulled
Full pulled
Fig. 4.1Air pulse back Demonstration
Fig. 4.2 Control board

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Connecting the power supply (four-pin plug)
Open the end cover of the four-pin socket on the machine and directly plug in with
the four-pin plug, and then connect the other end of wire to the power supply.
Engine Start (start button)
When the power is on, press the switch with the “on”status to start the engine. To
turn off the engine, press the switch with the “off”status, and the engine will stop.
4.3 Operation of Dust Cleaning
Two areas need to be cleaned: the first area to clean up is the filter bag and collection
bag; the second area to clean up is the cartridge filters.
4.3.1 Operation of the Collection Bag
The foldable long plastic bag tube can be continuously pulled out. When it collects a
certain amount of dust, it can be sealed by the nylon cable tie and then cut off with a
scissor. See the photos below:
Step 1
Fig 4.3 Operations
Step 2
Step 3

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4.3.2 Operation of cleaning cartridge filters
Take the cartridge filters out from the container and use air gun or brush to clean them.
Please refer to the steps in the below diagrams:
Fig. 4.4 cartridge filter cleaning
Step 1: Loosen the coupling 1 shown in Fig 4.4
Fig. 4.5 cartridge filter cleaning
Step2: Pull out the coupling 2 and move it away, and then loosen all snap joints 3
shown in Fig. 4.5
Fig. 4.6 cartridge filter cleaning
Step 3：Move the box cover 4 away from the box and take out all the cartridge filters 5
from the box. Use the air gun to clean them up as shown on Fig. 4.6

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4.4Operation of Pressure Relief Valve
4.4.1 Parts
4.4.2 Procedures of adjustment
Different vacuums have different negative pressure, so the pressure relief valve can be
adjusted. As to VFG-75E, it is equipped with a metal detachable pressure relief valve.
please refer to the photos below for method of adjustment:
At first, detaching Part A (as the photos show)
Secondly, detaching part C and part B (as the photos shows)
Fig 4.8 Step 1
Fig. 4.9 Step 2
Fig. 4.7 parts

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Thirdly, adjust the pressure.
As Fig. 4.10 shows, adjusting the screws and nut inside Part B with allen key and open
spanner. Firstly, keep the cylindrical screw in place firmly with allen key and adjust the
nut with the open spanner until it is tight so that the spring inside the valve is kept in a
firm status. At this time, the valve can be opened to release pressure only when the
vacuum reaches the highest negative pressure. After the adjustment, please assemble
them refer to step 1 and 2.
Note: the pressure relief valve will be adjusted accurately by the manufacturer.
Fig. 4.10 Step 3

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5 VFG-75E Circuit Diagram
Fig. 5.1 Circuit Diagram

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6 Routine maintenance and inspection
6.1 Daily maintenance
(1) During the operation of the equipment, it is best to designate a person to clean and
maintain all parts. The user must be trained in handling the machine and hazardous
dust. The person must be able to keep record of the machine.
(1) The designated person must be familiar on how to operate, service and check all
electronic parts. User must know its performance, structure and read the operation
manual. The user should be able to deal with any problem in a timely manner and
make sure the system can run normally.
(3) Test the technical parameters, such as air flow, temperature, pressure etc…on a
regular basis. Any abnormal problems must be dealt with timely.
(4) Inspect the air system. The dust discharge system should be working properly and
if any issues arise, repair immediately.
(5) When finish using the machine, user should leave the vacuum cleaner with
induced draft fan for a while to get rid of the wet air and dust inside the machine.
Then the filter cartridges must be cleaned (can do manual cleaning) to avoid filter
blockages affected by the wet air.
6.2 Troubleshooting and elimination method
Feature
Reason
Elimination method
Vacuum cleaner
doesn’t work
Phase sequence inversed
Exchange power cord L1 and
L2
Factory voltage
fluctuation is too big,
cause undervoltage or
overvoltage
Factory provides solution
themselves
High electricity current
cause thermal overload
protector to disconnect.
Inspect if the motor is still
working, if yes, the thermal
overload device may disconnect.

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Abnormal running
resistance
Flue gas moisture
condensation dust block
the filter cartridge/bag
Blocking air leakage, increase
the temperature of the flue gas.
Process system doesn’t
work
Recover to work
Lack of suction power
Suction hose blocked or
damaged
Clean or replace
Filter cartridge blocked
Clean or replace the filter
Emission
concentration is too
large
Filter cartridge/bag is
with wrong installation
Install and adjust the position of
the filter units.
Filter cartridge/bag
damaged
Replace
The first time using after
replacement of the filter
Use the filter continuously for
about 15minutes.
7 Technical Parameter
Model No.
VFG-75E
Voltage/frequency
Three Phase 380V/50HZ
Power
5.5Kw
Air Flow
530m3/h
Vacuum
3000mm H2O

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8 Main Parts List
If you require any spare part in the machine, please contact Look Floors with the part
number and name to supply for you.
No.
Description
Specification
Quantity (pcs)
1
Turbine motor
5.5Kw
1
2
Toray PTFE coated filter
cartridge
Ø225 *330mm
2
3
“Star” shaped filter bag
Ø550mm*440mm*12 folding
1
4
Quick plug
1
No. of Filter Bag（units）
1
No. Of cartridge filter
（units）
2
Diameter of Inlet
Ø75mm
Noisy level
74±2dB
Filter rate
99%
Material of filter bag
“star” shape needle felt
Material of filter
cartridge
“Toray” PTFE coated material (standard)
Filter fineness
0.3-1µm
Main filter method
Filter bag: negative pressure external filter
Filter cartridge: negative pressure external filter
Dimension
1100mm*720mm*1600mm
Weight（kg）
150Kg

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5
Vacuum pressure gauge
60mm with edge 0-680mbar
1
6
4inch industrial versatile
castor
4inch，PU material
2
7
8inch industrial wheels
8inch，PU material
2
8
Dust collection bag
1
9
Pressure Relief Valve
2BX4 141
1

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9Warranty
9.1 Scope and duration of warranty
From the date of purchase of this equipment, the warranty period is one year except for
hose and filters where no warranty is provided for them.
9.2 Conditions of warranty
(1) This warranty does not include the replacement for the complete machine.
(2) The warranty will be terminated automatically if the machine was not used as
specified or if the machine has been modified or the parts has been replaced without
written permission
(3) With strict compliance to this manual, not permitting improper operation or instances
outside of our control, warranty parts are damaged within the warranty period, the
manufacturer will provide free repair and replacement.
(4) If the customer needs to repair by himself, it must be done under the manufacturer's
permission and in accordance with the guidance plan, otherwise the manufacturer will not
be legally liable.
(5) If the equipment fails due to improper assembly or disassembly, we shall charge for
maintenance.
(6) Please keep this warranty card. Please attach it immediately after the warranty,
otherwise it will not be handled.
(7) If the machine or any vulnerable parts are judged to have been intentionally damaged
during the warranty period, it is not within the scope of the warranty.
(8) If the motor or control box is burned or damaged by an abnormal voltage during
operation, it is not covered by the warranty.
(9) When the machine cannot run normally due to the wrong wiring method, if it is
necessary for the manufacturer to send people to overhaul, if the non-machine fault is
checked by the maintenance people, the customer must pay the travel expenses and
working fee within the warranty period.

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Equipment warranty card for VFG-75E
After-sales service Site:
Customer Name
Contact person
Telephone
Machine Type
Motor Model
Invoice Number
Purchasing Date
Fault Description
Solution
Remarks
Customer’s
Signature
Date
Repairman's
Signature
Date
Note:
1. The warranty period of VFG-75E is one year except for hose and filters where the warranty does
not apply.
2. Please do not refit or disassemble our equipment. If the equipment is refitted or disassembled, our
company will not guarantee it.
3. If there is any problem with the machine, you can consult Flooring Wholesale Ltd first.