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Veolia Hydrotech Drumfilter HDF - 16/20V- Value Series, Operation And Maintenance Manual, Page: 23 / 43

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Veolia Hydrotech Drumfilter HDF - 16/20V- Value Series Operation And Maintenance Manual Download Page 23

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series

8. MAINTENANCE/SERVICE

8.1 Backwash system

The most common cause of disruption in the wash water system is nozzle clogging. Clogging is 

caused by particles in the wash water and/or by e.g. biological fouling in the pipe system.

The correct dispersal pattern is shown below for wash water. Clogged nozzles can produce a dif-

ferent dispersal pattern.

There are also nozzles that are self-cleaning and less sensitive to blocking than the conventional 

nozzles, see section 8.1.2.

8.1.1 Servicing conventional nozzles

1. Turn the main power switch to the OFF (0) position and the mode selector to the 0 (OFF) po-

sition. If the used backwash water supply unit is not from Hydrotech, ensure that the supply of 

backwash water is turned off.

2. Open the cover on the spray bar side of the filter.

3. Ensure that none of the nozzles are clogged by checking whether water runs through them.

Figure 8.1 Correct dispersal pattern for wash water.

Summary of Contents for Hydrotech Drumfilter HDF - 16/20V- Value Series

Page 1: ...Drumfilter HDF 16 20V Value Series Operation and maintenance manual Revised 2021 08 18...

Page 2: ...stop 7 2 6 Electrical safety 7 2 7 Safety instructions 7 3 DRUMFILTER 16V 20V VALUE SERIES 9 3 1 Overview 9 3 2 Identifying the filter 12 4 RECEPTION AND HANDLING 13 4 1 Reception 13 4 2 Storage 13 4...

Page 3: ...2 Level differences 19 6 2 3 Operating mode HAND continuous rotation washing 20 6 2 4 Operating mode AUTO automatic level control 20 6 2 5 Adjusting the level sensor 20 6 2 6 Adjusting delay time 21...

Page 4: ...4 3 Replacing filter elements 30 8 4 4 ALPHAFLEX 31 8 5 Drive chain 32 8 5 1 Checking and tensioning the drive chain 32 8 5 2 Using the chain tensioner to achieve correct tension 33 8 5 3 Replacing t...

Page 5: ...ormation is ignored it may result in serious personal injury and or damage to equipment The manual must always be available to personnel working with the equipment It is important that The manual and...

Page 6: ...n and locked with a padlock Maintenance and service may only be performed by authorised personnel Adequate lighting should be used when operating the filter and when working in close prox imity to the...

Page 7: ...to the OFF 0 po sition In the event of a power failure turn the main power switch to the OFF 0 position to prevent the filter drum from unintentionally rotating once the power is restored 2 6 Electric...

Page 8: ...tic control is activated Moving parts must not be touched Safety guards are fitted around the power transmission and in front of the support wheels Always make sure these are secured and correctly fit...

Page 9: ...9 Operation maintenance manual Drum filter HDF 16 20V Value series 3 DRUMFILTER 16V 20V VALUE SERIES 3 1 Overview Figure 3 1 HDF 16V 20V Frame version side view...

Page 10: ...10 Operation maintenance manual Drum filter HDF 16 20V Value series Figure 3 1 HDF 16V 20V Frame version front view...

Page 11: ...11 Operation maintenance manual Drum filter HDF 16 20V Value series Figure 3 1 HDF 16V 20V Frame version rear view...

Page 12: ...Identifying the filter The filter type serial number and year of manufacture are stated on the identification plate The filter type and serial number are also stated on the front of this manual Figur...

Page 13: ...if stored outdoors Heat and UV radiation can damage the filter elements If the filters are delivered in plastic covered wooden crates a special type of corrosion may occur if stored outdoors especial...

Page 14: ...5 C and air temperatures above 10 C At lower water and air temperatures filter in stallation should be indoors 5 1 2 Foundations The filter must be installed on a flat surface with sufficient load bea...

Page 15: ...tation Start drum rotation and check that the drum rotates in the same direction as the rotation arrow on the drive unit cover 5 6 Pipe connections Nominal pipe dimensions are specified in the section...

Page 16: ...remove a filter element and allow unfiltered water to run into the filter tank chamber A greater difference in water level between the inside and outside of the filter drum than 450 mm will damage the...

Page 17: ...de Turn the mode selector to select the operating mode see E in Figure 6 1 Note The appearance and layout of the control cabinet may differ depending on application Figure 6 1 Hydrotech control cabine...

Page 18: ...e switch to AUTO mode see figure 6 2 1 Figure 6 2 Hydrotech standard control cabinet type PFC option The control cabinet s construction is in general adapted to the respective application A Motor prot...

Page 19: ...evel inside and outside the drum is 250 mm during normal ope ration see Figure 6 3 The recommended level difference is 100 200 mm If an even flow after the filter is required the filter must be run wi...

Page 20: ...water supply is used the level sensor can control a solenoid valve instead of a pump The water level inside the drum will vary when AUTO mode has been selected The water level is at its lowest immedi...

Page 21: ...itivity ranges H S and L If appropriate sensitivity cannot be set using the selected sensitivity range another sensitivity range can be chosen For water with high conductivity low resistance choose se...

Page 22: ...cles are separated from the water by the filter fabric that is mounted on the outside of the filter elements while the clean water passes through the fabric to the outside of the drum 3 Operating mode...

Page 23: ...nt dispersal pattern There are also nozzles that are self cleaning and less sensitive to blocking than the conventional nozzles see section 8 1 2 8 1 1 Servicing conventional nozzles 1 Turn the main p...

Page 24: ...se order Make sure the nozzle nut reaches the stop position when turned a turn clockwise 7 Turn the mode selector to the ON 1 position and the main power switch to the ON 1 position 8 Open the main va...

Page 25: ...Nozzle components 8 1 2 Nozzle overview Figure 8 3 1 below shows nozzle types that may be used with the HDFV series filter A Top nozzle attachment B Rubber seal C Top Nozzle nut self cleaning optiona...

Page 26: ...r 1 Turn the main power switch to the OFF 0 position and lock it with a padlock 2 Drain the wash water filter by removing the cover at the bottom of the filter 3 Remove the lower part of the filter 4...

Page 27: ...haft and support wheels contains bearings that must be lubricated The filter is equipped with automatic greasers as standard NB Prior to service read section 2 7 Safety instructions 8 3 2 Checking cen...

Page 28: ...lifespan of the filter medium are diluted hydrochloric acid HCl diluted sodium hypochlorite NaClO and diluted sodium hydroxide NaOH The use of other types of cleaning agents may cause damage to the e...

Page 29: ...al ramp s nozzles as set out below 1 Remove the nozzle by turning it a 1 4 turn anticlockwise see Figure 8 6 2 Clean the nozzle with compressed air or a plastic brush Never use a wire brush metal pins...

Page 30: ...t the new filter element under the tensioning strap as far as possible carefully adjusting it horizontally 7 Press down the tensioning strap and filter element alig ning the holes in the tensioning st...

Page 31: ...he other way around sign in the direction of rotation it will rotate passively All other panels in the same segment are mounted in the opposite direction All panels that is lifting water are mounted i...

Page 32: ...witch to the OFF 0 position and lock with a padlock 2 Remove the motor cover to access the chain 3 Stretch the chain by turning the drum by hand in the non operational direction 4 Check the tension of...

Page 33: ...nd lock with a padlock 2 Remove the motor cover to access the chain 3 Remove the flooring tile with the screws marked blue in figure 8 10 When the screws are remo ved the floor tile can be lifted for...

Page 34: ...e bracket underneath the beam don t fall off Loosen the nut on the adjustment screw 5 Adjust the long screw until the chain gets the correct amount of tension 6 Secure the chain tensioner by tightenin...

Page 35: ...s again as set out in section 5 1 8 6 Rubber seal NB Prior to servicing read section 2 7 8 6 1 Checking the rubber seal The rubber seal for the inlet between the filter frame and drum must be checked...

Page 36: ...lugs are placed at the drum and two lugs is placed at the inside of the frame see figure 8 14 below To lift the rear of the drum place two chain clock ratchet hoists at each lifting lug and lift the...

Page 37: ...er HDF 16 20V Value series 8 8 1 Front side At the front side of the filter place a lifting jack along the centerline of the filter Gently lift the drum see figure 8 16 below Figure 8 16 Lifting the f...

Page 38: ...to service read section 2 7 Safety instructions First turn the main power switch to the OFF 0 position and then lock it with a padlock before performing any work on the filter Every week or at anothe...

Page 39: ...trictions NB Prior to service read section 2 7 Safety instructions See Appendix F Clean the strainer at the bottom of the MTR pump optio nal equipment using a brush Every week or at another interval b...

Page 40: ...be on when the relay is powered C Replace the defective level relay D The FILL EMPTY selector is in the FILL position D Set the selector to the EMPTY po sition 2 The filter does not stop after the ti...

Page 41: ...information about lubrication Symbol displaying moving parts Neg ligence to comply with safety regula tions may lead to injury This symbol is placed where certain attention is needed when handling the...

Page 42: ...drotech filters or any other product used together with Hydrotech filters please visit www hydrotech se Click on Manuals technical information Locate the desired product manual and select manual by cl...

Page 43: ...AB A Veolia Solutions Technologies Company Mejselgatan 6 235 32 Vellinge Sweden Telephone 46 0 40 42 95 30 Fax 46 0 40 42 95 31 E mail mailbox hydrotech se Webpage www hydrotech se Copyright All right...

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