Veolia Hydrotech Drumfilter HDF - 16/20V- Value... User manual

Drumfilter HDF - 16/20V- Value Series
Operation and maintenance manual
Revised: 2021-08-18

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
Table of contents
1. INTRODUCTION 5
2. SAFETY INSTRUCTIONS 6
2.1 Warning symbols 6
2.2 CE marking 6
2.3 Conversion 6
2.4 Personnel requirements 7
2.5 Emergency 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
4.3 Liing the equipment 13
5. GENERAL INSTALLATION INSTRUCTIONS 14
5.1 Installation site 14
5.1.1 Outdoor installation 14
5.1.2 Foundations 14
5.2 Emergency overflow 14
5.3 Electrical connection 15
5.4 Equipotential bonding 15

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
5.5 Checking drum rotation 15
5.6 Pipe connections 15
5.7 Backwash system 15
5.8 Filter placement 15
6. START-UP AND OPERATION 16
6.1 Check procedures during start-up 16
6.2 Automatic seings 17
6.2.1 Cleaning with integrated HPC (optional) 18
6.2.2 Level dierences 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
6.2.7 Seing the level relay 21
6.3 Backwash system 21
6.4 Auto greasers 21
6.5 Retightening bolts 21
7. FUNCTION 22
7.1 Intended use 22
7.2 Non-intended use 22
7.3 Filtration and backwash process 22
8. MAINTENANCE/SERVICE 23
8.1 Backwash system 23
8.1.1 Servicing conventional nozzles 23
8.1.2 Nozzle overview 25

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
8.2 Wash water filter 26
8.3 Bearings 27
8.3.1 Lubrication 27
8.3.2 Checking centre bearings for wear 27
8.4 Filter element 28
8.4.1 High pressure cleaning 28
8.4.2 Chemical cleaning of filter elements 28
8.4.3 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 the drive chain 35
8.6 Rubber seal 35
8.6.1 Checking the rubber seal 35
8.7 Worm gear motor 35
8.8 Liing the drum 36
8.8.1 Rear side 36
8.8.1 Front side 37
8.9 Maintenance chart 38
9. TROUBLESHOOTING 40
Symbols used on Hydrotech filters 41
Manuals & technical information 42

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
1. INTRODUCTION
This manual contains instructions for operation and maintenance of Hydrotech Drum Filter Value
series, HDF16V & 20V. Pay attention to all warning symbols that appear in this manual. If this in-
formation 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 other applicable documents are retained throughout the equipment’s entire
service life. The manual and other relevant documents are included as part of the equipment.
⊲The manual is carefully read by all who use the equipment, and that it is always available for
future use.

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
2. SAFETY INSTRUCTIONS
Hydrotech Drum Filter Value series HDF16 & 20V, is designed for safe operation provided that it
is installed correctly and used in accordance with the enclosed instructions. The equipment must
be installed correctly and adapted in accordance with local regulations. This equipment is desig-
ned for use by one or more operators. You must read the relevant sections of this manual before
using the equipment or carrying out maintenance work.
⊲Pay attention to all warning symbols that appear in this manual. If this information is ignored
it may result in serious personal injury and/or damage to equipment.
⊲Assume all electrical equipment to be live.
⊲Consider all hoses and pipes to be pressurised.
⊲Before carrying out maintenance work, the main power switch (see Figure 2.3) must be turned
to the OFF (0) position 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 filter.
⊲ The control cabinet for the filter must be placed in a way that the operator has visual contact
with the filter unit while operating the control cabinet.
2.1 Warning symbols
Warning symbols are used in this manual to draw attention to potentially dangerous situations:
Information that warns you of a potential risk of personal injury and/or damage to equip-
ment.
Warning stickers (see Figure 2.1) are affixed to the filter to warn personnel and act as reminders
to keep hands and fingers away from the filter’s moving parts.
2.2 CE marking
This equipment is CE marked (see Figure 2.2), which guarantees that the equipment is designed,
manufactured and described in accordance with the requirements set out in the EU Machinery
Directive 98/37/EU (AFS 1994:48).
2.3 Conversion
The CE marking does not extend to any components that are not approved by Hydrotech AB and
Figure 2.1 Figure 2.2

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
that are used in conversion/reconstruction of the equipment. The warning symbols and CE mar-
king must be attached where they are fully visible. If any part of the equipment with a warning
symbol is replaced, a new symbol must be attached in the same position. Damaged symbols and
CE markings must be replaced immediately.
2.4 Personnel requirements
In order to avoid personal injuries and dama-
ge to the equipment, service and maintenan-
ce may only be carried out by personnel that
are trained on the equipment and conversant
in local regulations. Service and maintenance
personnel may only handle those parts of the
equipment they have been trained for. The
operator may need to work inside the safety
barrier and in the safety zone during mainte-
nance and set-up before operation.
2.5 Emergency stop
The filter is equipped with a main power switch
(see Figure 2.3). To perform an emergency stop,
turn the main power switch 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 Electrical safety
Electrical installation must be carried out by a qualified electrician and in accordance with local
regulations. Also see Appendix D. The filter tank or the frame must be connected to ground. Also
see section 5.4. The main power switch/emergency stop must be fitted in accordance with app-
licable regulations.
2.7 Safety instructions
The filter is activated by turning the main power switch to the ON (1) position and then selecting
HAND or AUTO with the mode selector on the front of the panel. The filter stops if the mode se-
lector is turned to the 0 (OFF) position.
NB. See the instructions in section 6.1 (Check procedures during start-up).
Turn the main power switch to the OFF (0) position and lock it with a padlock before perfor-
ming any work on the filter.
Figure 2.3 Switches in control cabinet (optional)
A. Pump OFF (0) position
B. Pump ON (1) position
C. Pump switch
D. Mode (0) position
E. Mode (AUTO) position
F. Mode (HAND) position
G. Mode selection switch
H. Main power switch (ON (1) / OFF(0))

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
Access to the filter by unauthorised persons is strictly prohibited. Outdoor installations
must be fenced in.
The drum can begin rotating without warning if automatic 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 fitted.
The aerosols from the backwash water may contain harmful substances.
Measured noise levels from the filter are less than 74 dB (A). Personnel should use appropriate
protection, when necessary, in accordance with local regulations.

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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.

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
Figure 3.1 HDF 16V & 20V Frame version, front view.

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
Figure 3.1 HDF 16V & 20V Frame version, rear view.

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
3.2 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.
Figure 3.3 Filter identification plate.
Figure 3.4 Definition of filter type.

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
4. RECEPTION AND HANDLING
4.1 Reception
Once the equipment has been delivered and received it must be thoroughly checked for trans-
port damage. Document any transport damage before further handling of the equipment. The
consignment note, manual and spare part kit are attached to the equipment. Check all parts
against the consignment note. Some parts may be delivered unassembled. Handle fragile parts
with care. Before lifting the equipment, see section 4.3.
4.2 Storage
Some precautions must be taken to prevent damage to equipment if a long storage time is ne-
cessary (several weeks or more):
⊲The equipment should preferably be stored indoors, in a frost-free area.
⊲The filter must be protected against direct sunlight 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, especially in coastal areas. The moisture inside the plastic acts as an
anode and the exposed dry components as a cathode. In these areas, the filters must therefore
be unpacked immediately upon delivery.
4.3 Liing the equipme-
nt
⊲A forklift truck with long forks should
be used when lifting filters in wooden
crates.
⊲An unpacked filter with tank (type 1)
can be lifted with a fork lift truck, stan-
dard crane or with an overhead crane
with lifting straps.
⊲An unpacked filter without tank (types
2 & 3) can be lifted with a standard crane
or overhead crane and lifting straps. The
straps are positioned as set out in
The work area must be cordoned
off before unloading in accordance
with local regulations to prevent
unauthorised access. Figure 4.1 Lifting points for filter without tank (type 2/3)

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
5. GENERAL INSTALLATION INSTRUCTIONS
The following requirements must be fulfilled before installation can begin:
⊲The electrical specifications for the equipment must be in agreement with the applicable spe-
cifications for the available power grid.
⊲The equipment is free from damage (no damage incurred during transport or storage).
5.1 Installation site
5.1.1 Outdoor installation
For outdoor installation it is important to pro-
tect the filter elements against direct sunlight,
as heat and UV radiation can otherwise dama-
ge the filter elements. The filter must be pro-
tected against frost. The filter cover provides
sufficient protection at water temperatures
above +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 bearing capacity.
⊲ The filter is to be bolted to the foundation.
Minimum shear load requirements on anchor
bolts = 10 kN.
⊲ The filter must be level in both directions
(see Figure 5.1).
⊲ 600 mm wide aisles should be placed around the filter to permit easy access to the filter
during servicing.
⊲ On type 2 filters (without tanks), the space between the filter frame and concrete structure
must be covered to prevent access to moving parts and to prevent loose objects from falling into
the filter.
5.2 Emergency overflow
In certain configurations, an external emergency overflow is used in the event of electrical power
outages, for example, to avoid subjecting the filter fabric to excessively high pressure differences.
Figure 5.1 Filter installation

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
5.3 Electrical connection
Electrical connection must be done in accordance with local regulations. Check that the settings
on the motor protection device correspond with the motor data (see Appendices A and D).
5.4 Equipotential bonding
The Hydrotech Drum Filter and associated equipment should be protected with a suitable sys-
tem for potential equalisation. This is very important to prevent galvanic corrosion. Ideally use
a cable with a cross section of 10-16 mm2. The cable should be connected to the same electrical
potential as the drive system.
The filter is equipped with equipotential earth bonding points in every corner of the
filter. The decal in figure 5.2 is placed at these points.
Qualified and skilled electricians must perform all electrical work.
5.5 Checking drum rotation
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
Technical specifications, Appendix A. The water’s inlet
speed should not exceed 1 m/s. Piping for discharge of
sludge water must have a minimum downward tilt of 1%.
5.7 Backwash system
Newly connected piping systems for wash water should
be flushed for at least 10 minutes before they are con-
nected to the filter. Carefully check that the nozzles are
not blocked. Any particles in the backwash water supply
must be removed. A standard wash water filter can nor-
mally be used to remove these particles (also see section
8.2).
5.8 Filter placement
When placing the filter it´s recommended to have typi-
cally 1000 mm of free space on surrounding the filter to
allow for easy access. In cases where it isn´t possible to
have a free space buffer of 1000 mm it´s advisable to
have not less than 600 mm of free space. Figure 5.3 Filter seen from above
Figure 5.2

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
6. START-UP AND OPERATION
6.1 Check procedures during start-up
1. Check that the drive unit cover is installed correctly.
2. Turn the pump switch to the OFF (0) position (see F in Figure 6.1).
3. Set the main power switch to the ON (1) position (see J in Figure 6.1).
4. Set the mode selector to the HAND position (see E in Figure 6.1).
5. Open the water supply partially so that water slowly flows into the filter drum. Make sure that
the difference in water level between the inside and outside of the filter drum does not exceed
450 mm (see section 6.2.1). If the filter fabric becomes clogged, it may be necessary to fill the
filter tank/chamber with water from an external source or to 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 filter.
6. When the water level inside the filter tank (or concrete chamber) has risen above the pump
suction pipe (if a MTR pump is installed), the pump switch must be set to position 1 (ON).
NB. Also read section 2.7 (Safety instructions).
The backwash pump must not be started until the water level has risen above the suction
pipe (if a MTR pump is installed), otherwise the pump can run dry and fail.
7. When the water level inside the tank (or concrete chamber) reaches the overflow wall, turn the
operation mode selector from the HAND to AUTO position.
8. Fully open the water supply. The filter is now run in the mode for automatic level control. It
may be necessary to adjust the level sensor so that the filter can be run optimally (see section
6.2.4).

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
6.2 Automatic seings
The control system for HDF16V & 20V, must always be equipped with a frequency converter. This
is factory calibrated if delivered from Hydrotech. To perform a soft start of the drive motor, the
frequency converter settings must be min. 5 sec “ramp up” and min. 3 sec ”ramp down”. The filter
works with 50 Hz as standard.
Hydrotech control systems are available in various configurations. Hydrotech control cabinet
type PFC has a simpler control system with a logic module.
If the filter is equipped with a Hydrotech standard PFC controller, the filter has two operating
modes:
1. Continuous rotation (HAND mode)
2. Automatic level control (AUTO mode).
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 cabinet type PFC (option)
(Appearence of cabinet may differ depending on application)
A. DRUM DRIVE TRIPPED. LED that indicates when the frequency converter has tripped.
B. PUMP TRIPPED. LED that indicates when the wash water pump’s motor protection devi-
ce has tripped.
C. DRY RUNNING. LED that indicates when the dry running protection device for the wash
water pump has tripped.
D. RESET DRY RUNNING. Resetting of wash water pump’s dry running protection device.
E. OPERATION MODE. Mode selector.
F. PUMP. Pump switch.
G. CLEANING START. Chemical wash switch, key operated.
H. CHEMICAL CLEANING. Lamp that indicates when the chemical wash is in progress.
I. CLEANING SEQUENCE. Selector for number of sequences, chemical cleaning.
J. MAIN POWER SWITCH

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
6.2.1 Cleaning with integrated HPC (optional)
If the filter is HPC equipped, a control cabinet like the one in figure 6.2.1 below is used.
The basic function is the same as for the standard control cabinet. The only difference is the ad-
ded HPC function, operated as described below:
1. Turn the operating mode 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 protection pump
B. Fuses
C. Logic module
D. Contactor, pump
E. Control relays
F. Level relays
G. Frequency converter
H. Main power switch
Figure 6.2.1 Control cabinet, filter with integrated HPC.
A. HPC START. Starts the HPC programme.
B. HPC OPERATION. Light indicates that the HPC programme is running.
C. HPC PAUSE. Pauses the HPC programme.
D. HPC RESET. Resets the HPC to its home position.

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
2. Start the HPC programme with HPC START (see figure 6.2.1). Indicator light HPC OPERATION
indicates that the HPC programme is running.
3. When the cleaning programme has ended, the filter returns to normal operation in AUTO mode.
During the cleaning cycle, the machine continues to continuously filter with the pump in auto-
matic mode.
6.2.2 Level dierences
The maximum permitted difference
between the water level 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 with a small level difference.
The filter must be installed so that
the level difference in the event of
operating disturbances under no
circumstances exceeds 450 mm.
The filter must be run so that the
level difference during normal ope-
ration does not exceed 250 mm.
Prolonged operation with a grea-
ter level difference will significantly
shorten the life of the filter panels
and other vital parts.
Figure 6.3 Maximum permitted pressure difference during conti-
nuous operation.

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Operation & maintenance manual, Drum filter HDF 16/20V - Value series
6.2.3 Operating mode HAND – continuous rotation/washing
Operation with continuous drum rotation and backwash. In this mode, the water level inside the
drum is kept virtually constant. The level sensor and the automatic control system are disabled
when the HAND operating mode is selected.
6.2.4 Operating mode AUTO – automatic level control
With level control enabled, drum rotation and the backwash pump are activated when the water
level inside the drum reaches the level sensor. If an external wash 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 immediately after a back-
wash cycle and then rises until it reaches the level sensor. If a constant water level is required
inside the drum, the filter should be run continuously (HAND mode).
6.2.5 Adjusting the level sensor
Place the level sensor 50–100 mm below the recommended operational water level. The optimal
placement depends on the turbulence of the water surface. The level sensor can be moved freely
by undoing the cable gland that holds it in place. (see Figure 6.4)
NB. Prior to service, read section 2.7 (Safety instructions).
Figure 6.4 Adjusting the level sensor