Charnwood W791 User manual
1
DUST & CHIP EXTRACTOR
OWNERS MANUAL
MODELS: W791, W791/3, W791CF, W791/3CF
A 16 amp fixed electric
supply is required to run
this machine.
Recommended breaker size:
16 Amps (Type C)
Charnwood, Cedar Court, Walker Road,
Hilltop Industrial Estate, Bardon Hill, Leicestershire, LE67 1TU
Tel. 01530 516 926
2
GENERAL SAFETY RULES
WARNING: Do not attempt to operate the machine until you have read thoroughly and understood
completely all instructions, rules, etc. contained in this manual. Failure to comply may result in
accidents involving fire, electric shock, or serious personal injury. Keep this owner's manual and
review frequently for continuous safe operation.
1. Know your machine. For your own safety, read the owner's manual carefully. Learn
its application and limitations, as well as specific potential hazards pertinent to this
machine.
2. Make sure all tools are properly earthed.
3. Keep guards in place and in working order. If a guard must be removed for
maintenance or cleaning, make sure it is properly replaced before using the
machine again.
4. Remove adjusting keys and spanners. Form a habit of checking to see that the
keys and adjusting spanners are removed from the machine before switched it on.
5. Keep your work area clean. Cluttered areas and workbenches increase the chance
of an accident.
6. Do not use in dangerous environments. Do not use power tools in damp or wet
locations, or expose them to rain. Keep work areas well illuminated.
7. Keep children away. All visitors should be kept a safe distance from the work
area.
8. Make workshop childproof. Use padlocks, master switches and remove
starter keys.
9. Do not force the machine. It will do the job better and be safer at the rate for
which it is designed.
10.Use the right tools. Do not force the machine or attachments to do a job for which they
are not designed. Contact the manufacturer or distributor if there is any question about
the machine's suitability for a particular task.
11.Wear proper apparel. Avoid loose clothing, gloves, ties, rings, bracelets, and jewellery
which could get caught in moving parts. Non-slip footwear is recommended. Wear
protective hair covering to contain long hair.
12.Always use safety glasses. Normal spectacles only have impact resistant lenses. They
are not safety glasses.
13.Do not over-reach. Keep proper footing and balance at all times.
14.Maintain the machine in good condition. Keep the machine clean for best and safest
performance. Follow instructions for lubrication and changing accessories.
15.Disconnect the machine from power source before servicing and when changing the
blade.
16.Never leave the machine running unattended. Turn the power off. Do not leave the
machine until it comes to a complete stop.
17.Do not use any power tools while under the effects of drugs, alcohol or medication.
18.Always wear a face or dust mask if operation creates a lot of dust and/or chips. Always
operate the tool in a well ventilated area and provide for proper dust removal. Use a
suitable dust extractor.
3
ADDITIONAL RULES FOR DUST EXTRACTORS
1. Dust extractors are frequently moved around the workshop. Make sure that mains cables and
extractor hoses are positioned in such a way that they do not present a trip hazard.
2. Do not pick up pieces of metal or chunks of wood.
3. Switch off and unplug the extractor before removing the collection bag and/or filter.
4. Do not allow the collection bag to become over full.
5. When necessary, wash, thoroughly rinse and completely dry the filter bag. Using a wet or damp
filter bag will reduce its efficiency as it will quickly become clogged.
6. Dispose of waste in accordance with local regulations.
7. DO NOT use without the filter bag and collection bag in place.
8. Keep hair, loose clothing, fingers, and all parts of the body away from the end of the suction hose.
W791 Specification
Motor (Available in 240v single phase or 415v 3 phase)
1500w (2hp)
Recommended breaker size (MCB)
16 Amps (Type C)
Airflow (Without Bag)
2130m3/hour (1600cfm)
Inlet Diameter
1 x 124mm or 2 x 100mm
Bag capacity
148 Litres
Maximum continuous run time
8 hours
Sound Level
81 dB (A)
Dimensions (WxDxH)
880mm x 550mm x 1920mm
Weight (Gross / Net)
67kg / 60kg
Rating
Industrial
Warranty
5 Years
Risk of Injury! Wear Eye Wear Ear
Never reach into Protection Protection
the running fan During Prolonged Use
Rating Description
Industrial: Suitable for heavy use in a production environment.
Continuously rated, high power and strong heavy duty construction. Typically used by multiple
operators in a component manufacturing, production environment. Frequent long periods of heavy
use expected. Some maintenance and a basic level of self servicing is expected from the
operators. Expected maximum use of 1500+ hours annually.
4
Unpacking
This machine is supplied in 2 cartons.
Open the cartons and carefully unpack all of the contents.
AB C D
E F G H
N
I J K L M
O
AY-Piece Inlet FFilter Bag Support KFoam Sealing Strip
BMotor Assembly GBase Plate LHandle
CCollector Body HRight Side Panel MCollection Bag
DFilter Bag ICastors NBag Straps
ELeft Side Panel JRubber Gasket O Fixings Pack
5
Assembly
Install the 4 Castors to the Base
Turn the base upside down
Secure each castor using 4 Hex. Head
screws
Tighten with a 12mm spanner, or
socket set
Attach the 2 Side Panels to the Base
Turn the base back over so it now sits
on the castors.
The End of the Side Panel with the cut
out attaches to the base.
Starting with the screw on the end, use
3 of the Hex head Screws to secure
each panel.
Tighten with a 12mm spanner.
Attach the Motor Assembly to the
Side Panels
Lift the Motor Assembly onto the upper
end of the 2 side panels.
The lip of the motor assembly sits on
the outside of the side panels.
6
Use 8 of the Hex Head screws to
secure the motor assembly
Attach the Collector Body to the
Motor Assembly
Place the Rubber Gasket between the
2 parts.
Tip: Use a G clamp to hold the 2 parts
in place whilst fitting the screws.
Use 8 of the Hex Head screws to
secure the Collector Body
7
Fit the Handle
Attach the Handle using the 2 smaller
Hex head screws.
Tighten with a 12mm spanner
Fit the Filter Bag Support
Thread a Nut 20mm onto the end of the
Filter Bag Support
Add a Washer
Screw the Filter Bag Support into the
threaded hole in the Collector Body
Rotate at least 5 times and stop with
the hook directly over the centre of the
Collector Drum
Use a 12mm spanner to lock the Nut
down onto the Collector Body, to
prevent it rotating.
Fit 2 Foam Sealing Strips
Take a roll of Self Adhesive Foam, peel
off the backing paper and stick it to the
outside upper rim of the Collector Body.
Use a pair of scissors to trim off any
excess.
Repeat for the lower rim.
The foam helps to create an airtight
seal for the bags.
8
Fit the plastic Collection Bag
Open the bag and fit it over the outside
of the Collector Body rim.
Use the 3 spring clips, located around
the drum, top hold the bag in place
whilst fitting the Bag Strap.
Fit the Bag Strap over the plastic bag,
so it sits on the foam strip.
Engage the spring latch into one set of
hooks and fasten it with the lever.
Ensure the plastic bag is sitting higher
than the Bag Strap all around the rim.
Fit the Filter Bag
Locate the rectangle opening in the
open end of the Filter Bag.
Feed the Bag Strap into the pocket all
the way around the full circumference
of the bag, until it can be seen in the
opening again.
Engage the spring latch into one set of
hooks and fasten it with the lever.
Feed the loop sewn into the top of the
Filter Bag over the end of the Bag
Support.
9
Fit the Y-Piece
The standard inlet on the extractor is
125mm diameter. It can be converted
to 2 x 100mm diameter inlets by fitting
the Y-Piece.
Use a cross head screwdriver to
remove the retaining screw from the
inlet.
Fit the Y-piece over the inlet and then
re-fit the screw.
A blanking cap is provided if only 1 x
100mm diameter hose is to be used.
The Extractor is now ready to be connected to the electric supply.
Installation
16 amp 240v plug 16 amp 415v plug
The extractor is supplied with wires
only.
Single phase 240v machines will have
3 wires.
3 phase 415v machines will have 4
wires.
It can be hardwired into a spur or fitted
with an industrial plug.
Using the Extractor
Always start the extractor running before starting the dust producing machinery. Also allow the
extractor to run for 10 seconds after the other machine is switched off to allow dust in the hose
system to clear.
Empty the collection bag before it is overfull and dispose of the waste in accordance with the
current requirements of your local authority.
Please Note: Maximum recommended total hose length in use at any time is 7 metres. Longer
hose lengths may be used, but will reduce the performance.
10
When using the extractor with machines or power tools which have a smaller diameter connection,
it is recommended to run the 100mm diameter hose from the extractor up to the machines dust
outlet and fit the appropriate sized reducer at that point. This will maintain the airflow rate of the
unit.
For some applications it may be more convenient to use a smaller diameter hose. This will
inevitably reduce the performance of the machine and the length of small diameter hose should be
kept to a minimum.
Optional Items
1 Micron Cartridge Filter Upgrade
The standard cloth filter, filters down to 2 microns.
This optional cartridge replaces the cloth bag and filters down to 1
micron without any loss in performance.
Reducers
Used to connect the extractor to power tools or machinery with outlets
smaller than 100mm diameter.
Hoses
A range of transparent flexible extraction hose in different
diameters from 38mm up to 150mm
11
Troubleshooting
Reduced Performance
Rattling noise and vibration
Extractor will not start
Extractor does not run but buzzing noise
heard from motor
Extractor cuts out whilst running
Check the collection bag is not full.
Empty or replace the bag as required.
Check the filter bag is not clogged. Turn the
bag inside out and scrape the inside clean.
The filter bag can also be washed, ensure it
is completely dry before refitting.
Examine the hose system looking for
blockages. Remove the hose and clear out
the blockage.
Examine the hose and fittings for splits or air
leaks. Secure the leaks and replace any
worn hose.
Large pieces may be blocked by the inlet
grill. Remove the hose and Y-shaped
connector from fan housing and check for
pieces of wood or foreign bodies that are
unable to pass through the grill. Remove
them and reattach hose.
Check circuit breaker. Reset as required.
Loose wire. Remove the On/Off switch,
check the wires are pushed firmly onto the
terminals.
Failed switch. Replace the on/off switch.
Capacitor failure.
(For confirmation, spin the motor shaft by
hand. Press the start button whilst the shaft
is still rotating. If the motors now runs
normally, the start capacitor has failed.)
Replace the start capacitor.
Overheating. Leave the motor to cool and try
again.
12
Declaration of Conformity for CE Marking
Charnwood Declare that Woodworking Dust Extractor, Models: W791, W791CF, W791/3 &
W791/3CF
Conforms with the following Directives: Machinery Directive 2006/42/EC
Low Voltage Directive 2006/95/EC
Conforms with the following UK Regulations: Supply of Machinery (Safety) Regulations 2008
Electrical Equipment (Safety) Regulations 2016
And further conforms to the machinery example for which the EC type examination Certificate No.
NM 11050062 and NL11050076 have been issued by TUV Nord Group, 30519 Hannover
Germany.
I hereby declare that equipment named above has been tested and found to comply with the
relevant sections of the above referenced specifications. The machinery complies with all essential
requirements of the directive.
Signed: Dated: 03/10/2022 Location: Leicestershire
Richard Cook, Director
Please dispose of packaging for the product in a responsible manner. It is suitable for
recycling. Help to protect the environment, take the packaging to the local amenity tip
and place into the appropriate recycling bin.
Only for EU countries
Do not dispose of electric tools together with household waste material!
In observance of European Directive 2002/96/EC on waste electrical and electronic
equipment (EEE) and its implementation in accordance with national law, electric
tools that have reached the end of their life must be collected separately and returned
to an
environmentally compatible recycling facility.
Your local refuse amenity will have a separate collection area for EEE goods
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Charnwood W791 Parts List
Part No.
Description
Quantity
01
Castor
4
02
Hex. Screw 5/16” x 1/2“
16
03
Base Plate
1
04
Left Side Panel
1
05
Right Side Panel
1
06
Pan Screw 3/16” x 3/8”
12
07
Impellor Housing Cover
1
08
Hex Screw M6 x 20 (Left Hand Thread)
1
09
Washer
1
10
Set Screw 5/16” x 1/2"
2
11
Impellor
1
12
Impellor Housing
1
13
Hex Screw 5/16” x 1/2”
14
14
Handle
1
15
Hex Screw 1/4" x 1/2"
2
16
Hex Screw 5/16” x 1/2"
4
17
Rubber Gasket
1
18
Motor 1500w 2hp (240v or 415v options are available)
1
18-1
On/Off Switch (240v or 415v options are available)
1
19
Power Cable
1
20
Key 7mm x 7mm
1
21
Hex Screw 5/16” x 1/2"
8
22
Rubber Gasket
1
23
Collector Body
1
23A
Foam Sealing Strip
2
24
Nut 5/16”
1
25
Filter Bag Support
1
26
Filter Bag (2 micron)
1
27
Plastic Collection Bag
1
28
Spanner 12mm
1
29
Allen Key 5mm
1
30
Pan Head Screw 3/16” x 3/8”
1
31
Y-Piece Inlet (125mm to 2 x 100mm)
1
32
Motor Mounting Plate
1
33
Hex Screw 5/16” x 3/4”
4
34
Washer 5/16”
8
35
Nut 5/16”
4
STRAP
Quick Action Bag Clamp
2
CAP
Motor Capacitor (240v version only) 400MFD 125VAC
1
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