S U I TA B L E F O R 1 1 0 / 1 2 0 V a n d 2 2 0 / 2 4 0 V
OPERATION AND INSTRUCTION MANUAL
1. System and accessory specifications subject to change
2. Version 1
3. Prepared September 2003
4. Ref. LV750™
TA B L E O F C O N T E N T S
Electrical Control System
Pneumatic Foot Control
Thermal Cut Out
L I S T O F I L L U S T R AT I O N S
Laservac 750™ Disposables
Laservac 750™ Electrical Diagram
The Laservac 750™ Smoke Evacuation System has been designed to
remove all smoke plume, particulates and obnoxious odours
produced during laser surgery.
The Laservac 750™ is a totally self contained, portable machine, very
quiet in operation with variable flow capabilities, ideally suited for all
types of laser surgery. It is very simple to use with a full range of
disposable filters and accessories including a pneumatic foot switch.
The Laservac 750™ Filtration System consists of two High Efficiency
Filters connected in series, (one inside the other). The Primary Filter
removes bulk contamination whilst the Secondary Filter de-odourises
the air and removes down to virus size particles. Due to the direct
link between the filters and their location prior to the vacuum motor
there is no possibility of contamination reaching other components or
the inside of the cabinet.
The overall efficiency of the filtration system is >99.9999% at 0.12
The Laservac 750™ is manufactured to the highest engineering standards incorporating a very strong cabinet moulded from foamed
polyurethane. The electrical system conforms to CAN\CSA C22.2
No 601.1-M90 Category 245 & UL-544 /ETL Product Category 6 for
Medical and Dental Equipment.
The Laservac 750™ is a portable lightweight system with a ‘built in’
carrying handle and when in operation it sits on two moulded feet.
The purpose moulded cabinet has smooth lines with a high quality
surface finish to eliminate dust traps and aid in the cleaning of the
unit. The cabinet incorporates several special features including:
front control panel, rear stowage compartment with latchable lid,
louvres for internal cooling and excellent acoustic properties. The
Laservac 750™ consists of the following major components.
The vacuum source is a dry running, two stage ‘by-pass’ vacuum
motor. This high capacity motor runs on a single phase 110/120V60Hz or 220/240V-50Hz electrical supply and requires no
lubrication. As a protection measure the motor has a thermal cut-out
to prevent over-heating.
The Primary Filter consists of a two part plastic housing containing a
high efficiency filter element for removing bulk contamination. This
filter fits directly into the Secondary Filter by means of a simple
bayonet connection. The outer portion of the filter housing is made
from clear plastic to allow visual monitoring of the element during
Lifetime of the Primary Filter depends on usage and the type of
surgical procedure performed. Walker Filtration recommends that the
Primary Filter is replaced after every operation.
The Secondary Filter consists of a duplex filter element sealed inside
an enclosed cannister. This filter which is fitted inside the machine is
designed to remove obnoxious odours, fumes, vapours and bacterial
Lifetime of the Secondary Filter depends on usage and type of surgical
procedure performed. Walker Filtration recommends that the
Secondary Filter is replaced at least every six months. In cases where
unpleasant odours are positively detected from the smoke evacuator
earlier than six months, then earlier replacement is required.
The Laservac 750™ can be switched ON and OFF by means of an
illuminated rocker switch located on the front control panel. The
control panel also has a variable speed control knob. The vacuum
level/air flow rate can be set for optimum performance by rotating the
The Laservac 750™ has a Pneumatic Foot Switch located in the rear
compartment. This can be removed from the compartment and used
to operate the machine remotely but only when the rocker switch is
in the ON position.
Each Laservac 750™ is supplied with a Starter Pack containing all the
items required to install and operate the unit. The Starter Pack consists of the following items:Walker Filtration
Transfer Tube (1.5m)
Cathetor Tube (1.5m)
Cathetor Tube (2.0m)
All of the above accessories and further spare parts can be purchased
from your nearest Walker Filtration branch.
5. ELECTRICAL SYSTEM
The electrical schematic diagram is included at the back of this
manual, page 11.
The machine is protected by two anti surge line fuses located within
the IEC mains inlet socket.
Thermal Cut out
The machine is further protected by a thermal cut-out switch. If, due
to any circumstance this switch trips out, it will reset itself when the
machine cools down to the normal operating temperature.
If the thermal cut-out operates, the machine must be disconnected from the mains power supply and allowed to cool down
before being switched ON again. The cooling down period will take
at least 30 minutes.
The obvious cause of the thermal cut-out operating is if the cooling
fan inlet filter is blocked or obstructed.
6. OPERATIONAL DATA
Under clean conditions the Laservac 750™ will draw 300L/m (10
scfm) with the Speed Control on minimum and 750 L/m (26 scfm)
when on maximum through a 22mm (7/8”) dia connection hose.
If the performance drops to an unacceptable level the Primary Filter
will need replacing.
The use of extensive sound insulation and noise suppression within
the cabinet has given the Laservac 750™ a noise level of less than 60
dbA when measured at 1 metre. The Laservac 750™ should be
operated at the lowest acceptable speed setting to give the lowest
The LV750™ Smoke Evacuator has been fully tested prior to
despatch however, due to possible damage in transit, the following
checks and precautions should be taken :1) Check for transport damage and shortages. Advise your
Walker Filtration dealer immediately if there are any
2) Check the back panel serial plate to ensure the voltage and
frequency are correct.
The following procedure should be used :1) A two metre long mains lead is supplied in the Starter Pack, an
IEC plug is moulded onto one end and a suitable 3-pin mains plug
must be connected to the other end. Observe the label attached to
the lead for wire identification. The machine must NOT be
operated without an earth connection.
2) Ensure the rocker switch is in the OFF position.
3) Rotate the Speed Control anti-clockwise for minimum setting.
4) Fit a Primary Filter into the front aperture and rotate clockwise
to lock in position. NOTE - the clear plastic portion to the out
5) A standard IEC 320/CEE22 mains inlet socket is located at the
rear of the machine. Fit the IEC plug into the socket and connect
to the mains supply. Switch the mains ON.
6) Switch the rocker switch to the ON position. The neon
indicator will light up (confirming mains power) and the motor
will start running quietly.
7) Rotate the Speed Control clockwise and observe the vacuum
suction/air flow rate increase significantly. Return the speed
8) Open the rear compartment by pressing the panel in the centre
to release the internal latch and remove the Pneumatic Foot
Switch and tubing. Close the panel with the tube passing through
the small slot. Put the Foot Switch on the floor and press once,
the motor will stop.
Press the Foot Switch again and the motor will restart.
NOTE - The Foot Switch will only operate with the rocker switch
in the ON position.
Return the Foot Switch to the rear compartment ensuring it is
not pressed again and close the panel.
9) Switch OFF the machine and isolate from the mains.
YOUR MACHINE IS NOW READY FOR NORMAL OPERATION.
Ensure the Laservac 750™ is in the OFF position.
Ensure that the air cooling ducts on the rear of the machine
are not obstructed or blocked.
Connect to the electrical mains supply.
Insert a Primary Filter and observe the Instruction Leaflet
Connect a Transfer Tube to the inlet of the Primary Filter.
Connect the required accessory (Cathetor Tube and
Connector, Wand or Funnel) to the inlet of the Transfer Tube.
Remove the Foot Switch if required and close the lid.
Switch the machine ON.
Adjust the speed control to the desired setting.
8. SAFETY PRECAUTIONS
Always switch the machine OFF when not in use.
Always disconnect from electrical power supply after each
Do not allow excessive liquids to reach the Primary Filter.
Liquids reduce the filter life and can be drawn through into the
Secondary Filter and destroy its efficiency.
Coil mains lead and stow away after use.
Do not allow electrical circuit to get wet.
Clean only with a damp cloth.
DO NOT use the Laservac 750™ within the ‘Zone of Risk’,
this being an area extending from 25cm around any part of the
anaesthetic circuitry and the gas paths of any anaesthetic
apparatus. Within this area full precautions must be taken with
respect to flames, hot surfaces or sparks from all cause.
To avoid contamination and the associated health risk, protective
clothing (gloves and face mask) are to be worn when replacing any
contaminated consumable component or working on internal parts of
Clean machine external surfaces regularly with a damp soapy
cloth or with a suitable sterilising agent.
Replace Primary Filter as instructed ie. after every operating
Replace Secondary Filter as instructed ie. at least every 6
months as per section 3.3.
The Secondary Filter is replaced by first placing the unit in an
upright position. Unscrew four screws to remove the front
panel and withdraw the used Secondary Filter. Care should be
taken when removing and handling a contaminated filter. The
contaminated filter once removed should be immediately
placed in a plastic bag. (The bag supplied with a new filter can
be used for this purpose).
Insert the new Secondary Filter inside the smoke evacuator
with the instruction label towards the top of the machine.
Replace the front panel and ensure that the tab on the filter fits
into the location slot of the panel and tighten screws. (4 new
screws supplied with Secondary Filter).
Replace disposables after every operation.
Change the fuses every 12 months.
Check the mains cable for wear and tear every 3 months and
replace if necessary.
Check the foot switch and tube for wear and tear every 3
months and replace if necessary.
Check cooling fan inlet filter at the rear of the machine for
contamination by unscrewing 4 grill securing screws &
removing filter pad. Clean if required in warm soapy water
and dry before replacement.
NOTE: A clean filter of the correct material is essential for the
machine to operate correctly.
The vacuum motor will improve in performance during the first few
hours running. There is virtually no maintenance required, however
the carbon brushes will eventually need replacing and this should be
carried out by a qualified service engineer.
11. FAULT FINDING
If the machine does not work :a)
With the rocker switch in the ON position check to see if the
neon is lit. If it is lit this means that the power supply and fuses
are operational. If the neon is not lit then check the fuses and
If the neon is lit then press the foot switch as the pneumatic
switch may be in the OFF position.
If the motor still does not run, call a Walker Filtrationauthorized technical personnel
The Laservac 750™ has full parts warranty for 12 months.
For further details see your nearest Walker Filtration branch.
Weight 13.5 Kg
Laservac 750™ 110V & 240V