end user manual - Vaughn Distribution LLC
Contents
1. Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 1 1 Capture Efficiency Sten A cleaner working environment Capture Efficiency of the Alsident System extraction arms To ensure that the planned necessary air volume is extracted it is recommended to ask for a test report from the installer proving the actual air volume If the installation includes several extraction arms you must check with the installer that the right amount of air is available on the number of extraction arms in concurrent use as planned with the installer By following three simple rules you can achieve the best possible efficiency 1 Position the hood correctly in relation to the pollution source 2 Choose the right hood for the specific type of pollution 3 Position the hood as close to the pollution source as possible 1 Positioning of the hood The various positions of a hood can be arranged in three groups ways the vertical a the angled b and the horizontal c position of the opening see ill Many users position the opening horizontally which is the less efficient position It is important to consider the optimal position of the hood before the hood is chosen because many types of hoods are suitable in various positions The dispersion characteristic of the pollution is essential for postitioning of the hood There are many types of pollution with various dispersion characteristics such as swirling dust hot steam sol2. alsident User s Manual system A cleaner working environment User s Manual for Alsident System Extraction arms With Alsident System we focus on producing extraction arms of high quality with long duration Alsident System Extraction arms require a minimum of maintenance and are easy to clean The design makes the extractopm arm self supporting and provides a unique user friendly extraction arm which is easy to clean Read this manual and follow the advice and guidance given on the operation and the capture efficiency and your extraction arm will be of great use in many years to come Further information is available on www alsident com or by contacting your supplier Contents 1 SYSTRIMOVERVIGW a cacciecdecsscossescnescdbscocatzerussieasestansetsassesdsstiacenssceusastdoosesaseres 2 2 Guide to technical terms sseecssescssssecssecsseeccseccsscecesceesneecsncessneceseeesaes 3 3 Correct position of the extraction arM sssssssssssesssssssssssrssesesssssss 4 4 Operation of the extraction afM s sssssssssssssssssrsrsssesssssessresressssssssresee 5 5 Capture CFCISNCY waisscecscsssesscsesrazsaseesseensacecceeszenccisa ersazensevvcsriiadsnevvsnesaiees 5 6 Troubleshooting sssecsssscssseecsseccsneccsnecessecesseccsscesseccesccssseecsscessnecesseeesses 6 7 Adjustment of internal Springs ssssssssscsssscessssecsssescessseeesnseeesnneeees 7 Right reserved for modification of design and measureme
3. cleaner working environment 6 Troubleshooting 6 1 The extraction arm cannot hold its position If the extraction arm is in a stationary rim position it can happen that the extraction arm will rise or sink from it working position Several things can cause this Below you can see a short description 6 1 1 The extraction arm sinks from its position If the extraction arm is extended far from its mounting point it is very likely that more friction in the joint is needed to prevent the extraction arm from sinking Therefore the thumbscrews must be tightened If the point of extraction exceeds the specified working area of the extraction arm the extraction arm is either too short or the mounting point is wrong download our Working Areas from the website The best solution is either to choose a longer ex traction arm or to move the mounting point closer to the pollution source The internal spring might be weakened when the extraction arm is used in a rim position for a long time causing the extraction arm to sink from its position Here the solution will be to strengthen the spring Read more under section 7 Adjustment of internal spring 6 1 2 The extraction arm rises from its position If the extraction arm is bent under itself towards its mounting point more friction in the joint is also necessary in this case to prevent the extraction arm in rising from its position by tightening the thumbscrews If this position is the int
4. d by bending the legs in the winding direction a spring is strengthened by bending the legs against the winding direction Right reserved for modification of design and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 7 7 User s Manual Sete A cleaner working environment Demounting of gas spring Gas springs are mounted on the longer models of Systems 75 and 100 Especially during a thorough cleaning of the extraction arms it may in some cases be necessary to remove the gas springs During this process it is important to put the extraction arm into the right positions in order to prevent damage to the gas spring and the extraction arm 1 Demounting gas spring To prevent damages to the gas spring and the extraction arm it is important to position the extraction arm in a way that takes the pressure off the gas spring and leaves it inactive when demounting and mounting the gas spring 1 1 Demounting gas spring on socket pipe The gas spring on a wall or ceiling mounted extraction arm is a pull spring It is important to push the A pipe up towards the socket pipe as far as possible leaving the gas spring inactive Now you are able to demount the gas spring by removing the thumb screws from the clamp rings Warning The extraction arm will not hold the upright position without the gas spring On mounting the gas spring the A pipe must be pushed up towards the socket pipe until the gas spri
5. dering fume heavy and light gasses The vertical and the angled positions are in general more efficient than the horizontal position as they both especially the vertical position obtain a better capture zone because of the hori zontal surface Coanda effect The horizontal position normally less efficient You will find more information in our test report Capture efficiency which can be downloaded from www alsident com under Technical Support a Vertical position b Angled position c Horizontal position Example 1 Heavy gas Heavy gas quietly evaporating will lie on a flat surface table and disperse over it In this case the optimal position is a vertical position of the hood on or close to the table Example 2 Warm vapour However a warm vapour rises upwards with some velocity In this example an angled position of the opening above and possibly slightly behind the pollution source is preferable Both examples lead to the choice of two different types of hood Right reserved for modification of design and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 1 2 Capture Efficiency Sota E A cleaner working environment E 2 Choice of hood The individual types of hood are suitable for one often two of the three options Generally we recommend the dome hoods as they are well suitable in the angled or horizontal position whereas the flat screen is be
6. e speed of the pollution see ill Right reserved for modification of design and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 2 2
7. ended working position a too long extraction arm might have been chosen or the mounting point is wrong A shorter extraction arm or moving the mounting point further away from the pollution source will be the best solution A position in the lowest working area can make some of the models rise upwards as the internal spring is a bit too strong for this position This is adjusted by weakening the spring a bit Hold the extraction arm in both hands and push it below the wanted position towards vertical position a couple of times until the position is held Make sure not to weaken the spring too much If the extraction arm is positioned within the specified working area the problem might be that the O rings in the joints have lost their friction due to soiling from oil glue or similar In this case the O rings are to be cleaned as described in the document Cleaning of the extraction arm which can be downloaded from our website under Maintenance 6 2 General Please contact your installer if you need help solving any problem It might be of great help to the installer if you would be able to send a couple of photos showing the problem and the entire extraction arm in working position 6 3 Spare parts Some parts of the extraction arms are wearing parts with a shorter lifetime than the extraction arm in general It is always possible to buy new spare parts for the Alsident System extraction arms from your installer Right reserved for m
8. ews on the sides of the joint may be loosened or tightened depending on how much fric tion is needed to keep the extraction arm in position The finger screws are to be tightened according to requirement if they get loose because of frequent movement and positioning of the extraction arm A The more the thumbscrews are tightened the more force is needed to reposition the extraction arm Where large friction is necessary we recommend loosening the thumbscrews slightly before the ex traction arm is repositioned 5 Capture efficiency To ensure that the planned necessary air volume is extracted we recommend you to get a test report from your installer in order to document the actual air volume Where more extraction arms are used simultaneously you must ensure that there is sufficient air volume available on the number of extraction arms in concurrent use as planned with the installer By following three simple rules you can achieve the best possible efficiency 1 Position the hood correctly in relation to the pollution source 2 Choose the right hood for the specific type of pollution 3 Position the hood as close to the pollution source as possible Find more on this subject under Technical support and download the document Capture efficiency under Maintenance Right reserved for modification of design and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 5 7 User s Manual Sten A
9. ng fits easily onto the two clamp rings It is impossible to extend the gas spring during the mounting Due to the strength of the gas spring it is only extendable while mounted on the extraction arm The gas spring ona table mounted extraction arm is a push spring It is important to push the A pipe towards vertical position until the gas spring is fully extended in order to make it inactive By removing the thumb screws from the clamp rings you can now demount the gas spring Warning The extraction arm will not hold the upright position without the gas spring On mounting the gas spring the A pipe must be pushed towards vertical position until the gas spring fits easily onto the clamp ring on the B pipe and the angle bracket on the middle joint It is impossible to contract the gas spring during the mounting Due to the strength of the gas spring it is only contractable while mounted on the extraction arm 1 2 Demounting gas spring on middle joint On all extraction arms this gas spring is a pressure spring It is important to extend the B pipe upwards as far as possible until the gas spring is fully extended on order to make it inactive By removing the thumb screws from the clamp rings you can now demount the gas spring Warning The extraction arm will not hold the upright position without the gas spring On mounting the gas spring it is important to adjust the angle between the A and B pipe until the gas spring easily fits onto the clam
10. nt to put on the small washers at the 5 mm fingerscrews on the joint When mounting the joint on the extraction arm the small fingerscrews must point forwards and the damper wing must be to the right If the joint with damper is turned the wrong way the damper is not airtight The O rings are made of polyethylene PE and are maintenance free If the O rings are exposed to oils or fats the friction between O rings and contact surfaces will be reduced and prevent the extraction arm from holding the working position In this type of environment we recommend frequent cleaning of the O rings A thinner such as acetone or similar can be used for cleaning In order to clean the O rings and the contact surfaces it is necessary to take the joint apart 4 Frequency The necessary cleaning frequency depends on the pollutant extracted and the environment where the extraction arm is mounted Generally it is necessary to clean the hood stub pipe and joint with damper more frequently than the A pipe We recommend frequent checking for dirt by removing the hood to take a look into the joint with damper When you remove the joint with damper for cleaning we recommend also to take a look into the B pipe to check if it is dirty inside If the extraction arm is mounted in a working environment where hygienic demands are strict we recommend systematization and planning of the cleaning procedure Right reserved for modification of design and measurements
11. nts Alsident System A S Finlandsvej 10 8450 Hammel www alsident com User s Manual alsident system A cleaner working environment f 1 System Overview System System 50 System 50 Flex System 63 System 75 System 75 Telescopic System 100 Se Aluminium AL Antistatic AS Chemical Resistant CR 50 mm e 50 mm e 63 mm E 75 mm e e e 75 100 mm 100 mm e 1 1 Type of Material Aluminium AL Antistatic AS Chemical Resistant CR Extraction arms of aluminium are suitable in specified areas with no requirement to chemical resistance or conductivity The antistatic extraction arms are suitable in ESD areas and ATEX areas Systems 75 and 100 where conductivity is required Find more information on the approvals in Test reports and Mounting on our website under Technical support These extraction arms are suitable in aggressive working areas with special demands to chemical resistance in relation to work with aggressive chemicals Right reserved for modification of design and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 2 7 User s Manual alsident A cleaner working environment gt 2 Technical Terms lt a i Socket pipe ET TR Middle joint B Pipe Small thumbscrews Socket joint A Pipe Wing for damper Joint with damper Right reserved for modification of de
12. odification of design and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 6 7 User s Manual Sten A cleaner working environment 7 Adjustment of internal spring In certain cases it might be necessary to adjust the strength of the internal spring by weakening or strengthening it In order to tighten the spring the extraction arm must be demounted from the bracket The socket joint must be dismantled by removing the thumbscrew from the joint and pulling the threaded stay out Now bend the legs of the spring against the winding direction making the spring effective at an earlier point See the illustration below In order to weaken the spring the extraction arm must also be demounted from the bracket and the socket joint must be dismantled The legs of the spring must be bent in the winding direction to affect the spring to grip at a later point See the illustration below The below figures show the spring in three different positions 1 a weakened spring 2 a spring in normal position 3 a strengthened spring Bend the legs of the spring in a distance of app 14 x h from the winding The angle v depends on the need for strengthening weakening of the spring It is advisable to bend stepwise e g 5 and frequently make a test of the spring Spring for table mounting Spring for wall and ceiling mounting For all three springs apply a spring is weakene
13. p ring on the A pipe and the angle bracket on the middle joint It is impossible to contract the gas spring during the mounting Due to the strength of the gas spring it is only contractable while mounted on the extraction arm Right reserved for modification of design and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 1 1 Cleaning Siew A cleaner working environment Cleaning of the extraction arm Polypropylene PP can be cleaned by using almost any commonly used detergent or ordinary cleaning spirit Polypropylene PP and PETG are not to be exposed to temperatures above 90 C therefore the parts cannot be sterilized by autoclave For general cleaning Use a common detergent or other ordinary cleaning product For intensive cleaning Do not expose PP and PETG hoods to temperatures above 90 C As mentioned the hoods can be wiped by using ordinary cleaning spirits 2 Joint with Damper For general cleaning Wash the joint with damper with a detergent or other ordinary cleaning products We recommend once in a while to take the two half joints apart by loosening one of the fingerscrews on the joint and pulling out the threaded stay Then it is possible to clean the O ring as described below For intensive cleaning It is necessary to take the joint with damper completely to pieces Please be sure to reassemble the joint properly and mount it correctly on the extraction arm It is very importa
14. sign and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 3 7 User s Manual Sten A cleaner working environment 3 Correct position of the extraction arm We recommend before use to check that the extraction arm is mounted correctly Incorrect mounting may affect the flexibily of the extraction arm See illustration on page 3 of the correct mounting e Check on the joint with damper that the small thumbscrews are facing forward and the wing for damper is to the right side e Check that the Alsident label is facing forward on the pipe above the joint with damper One of the consequences of an incorrect mounting is that the spring will not come into function and the extraction arm will therefore sink from the intended working position Through time this will cause the spring to loose its strength irretrievably To re establish the correct function of the spring it will need replacement 3 1 Models 3 1 1 Table mounted This type is easy to correct by turning the two pipes over the socket pipe If the extraction arm cannot keep the working position a strengthening of the spring might help before replacement of the spring See section 7 When the extraction arm operates two work stations it is important that it is rotated on the socket pipe between the work stations DO NOT turn the extraction arm up and behind the socket pipe 3 1 2 Wall Ceiling mounted Changing an incorrect moun
15. ting of wall og ceiling mounted extraction arms requires a demounting of the extraction arm Caution The internal spring will be damaged by turning the extraction arm down backwards below the bracket and socket pipe The extraction arm has to be demounted from the bracket and reversed UP above the socket joint If the extraction arm cannot keep the working position a strengthening of the spring might help before replacement with a new spring See section 7 When the extraction arm operates two workstations it is important that the extraction arm is rotated in the bracket DO NOT turn the extraction arm down and behind the socket joint Right reserved for modification of design and measurements Alsident System A S Finlandsvej 10 8450 Hammel www alsident com 4 7 alsident I User s Manual system A cleaner working environment E 4 Operating the extraction arm The extraction arms are easy to position at the pollu tion source and can just as easy be repositioned to a new work situation or rest position when not in use The socket joint rotates freely from side to side only limited by the surroundings and up down The middle joint rotates upwards and downwards and the joint with damper at the hood also rotates around the pipe in a limited angle The joint with damper also rotates upwards and downwards and the hood rotates in a limited angle This gives a very high mobility and flexibility The thumbscr
16. tter for a vertical or an angled position Due to the design the square hood can be placed naturally in all three positions but obtains the highest efficiency at the vertical and the angled position Example 1 heavy gas continued Several hoods are suitable for the position with vertical opening The precise number of these hoods depends on the system 50 63 75 or 100 The flat screen is available in all four systems and is designed for a vertical opening and a position on or near to a horizontal surface table In this position the flat screen hood creates a draught across the table directing the heavy gas towards the hood Example 2 warm vapour continued Several hoods are suitable for the angled position of the opening e g the flat screen hood but with this combination of position and pollution a dome hood could also be a good choice The size of the dome hood depends on the size of the pollution source 3 Distances and cross flows The capture efficiency is also influenced by the distance to the pollution source and sorrounding air currents This means that the closer the hood is placed to the pollution source the higher efficiency It also means that it is advantageous to place the hood in the moving direction of the pollution For example if a cross flow in the room e g cold air from a window over the table leads the pollution in a certain direction you place the hood in order to take advantage of the direction and th
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