Rotodisk - Irritec

Transcription

Rotodisk - Irritec

Rotodisk® Automatic
Operating and
maintenance
instructions
IU4304
MAY 2006
Operating and maintenance instructions
Rotodisk® Automatic filter and filtering station
Versione
Revisione
01.05/2006
00/
Table of contents
1. Technical characteristics and operating principle
3
1.1 Technical characteristics of the automatic filter
3
1.1.1 Filter components
3
1.1.2 Operating principle of the automatic filter
4
1.1.3 Operating conditions of the filter
5
1.2 Technical characteristics of filtering stations
6
1.2.1 Components of the filtering station
7
1.2.2 Operating principle of the filtering station
8
2. Assembly of the filtering station
3. Start-up instructions
12
3.1 General recommendations
12
3.2 Nominal operating conditions
12
4. Manutenzione
13
4.1 Routine maintenance
2
9
Copyright ©2006 Irritec srl. All rights reserved.
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1. Technical characteristics of the automatic filter
1.1.1 Components of the automatic filter
The figure below shows all the main components of the Rotodisk® Automatic filter
6
7
8
9
10
1
11
12
13
14
2
15
16
3
17
4
5
18
19
Descrizione
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Quantità
1
Cover
Polycarbonate cover
1
OR cover-filter body
1
Clamp
1
Rotodisk base 2”
Rotodisk base 3”
1
Filter base cap 2”
Filter base cap 3”
1
Knob
1
Guard
1
Spring
1
OR spacer - screw (25.80 x 3.53)
1
Spacer
1
OR bush-pressure plate (45.69x2.62)
1
Pressure plate
1
OR pressure plate-screw
1
OR pressure plate-cartridge
315
Disks
1
Propeller
1
Supporte disçs
4
Lip seal
1
OR cartridge-filter body
Materiale
Ref.
Nylon
0FFCANF00N000
PC
0FFCA9F0 0T000
NBR
0IGCG00000000
Stainless steel 0IFFG00000000
Nylon
0FT0FG00V200N
Nylon
0FT0FI00V200N
PP
IZ60920F0N630
PP
IZ60950F0N900
Nylon
0FMRAN000N000
PP
0FCCR2000N000
Stainless steel 0HMOL00000436
NBR
0HOR2580352A0
PP
0FDIS2000N000
NBR
0HOR4569262A0
PP
0FSDRN000N0NL
NBR
0HOR2664262A0
NBR
0HOR6944353A0
PE HD
0IDIG7000R012
Nylon
OFELIN000N000
Nylon
0FCRAN000N000
NBR
0HGUACAR.ROTO
NBR
0HOR135896990
3
Versione
Revisione
1.1.2 Operating principle of the automatic filter
During the filtering phase, the Rotodisk® Automatic filter works like a normal disk filter. The filtering medium,
consisting of a set of disks piled onto a sturdy Nylon
support, filters suspended matter from the flowing water
stream. The progressive accumulation of suspended
particulate matter on the surface of the filtering medium
increases the pressure difference between the inlet and
the outlet of the filter (pressure drop).
When the pressure drop is too high, the filtering efficiency decreases, and the filter must be cleansed.
By reversing the flow of water, compared to the normal
filtering stage, the axial pressure on the disks is removed and the disks are made rotate by strong water jets.
The impact of the water on the disk surface and the
centrifugal force produced by the rotation of the disks
allow a thorough wash of the system. In a filtering station, each filter is backwashed using the filtered (clean)
water from the other filters, that are working normally
and can supply also the other equipment. The backwashing phase can be started in manual mode, using the
solenoid valve, or in automatic mode, by programming
the control unit. For example, the backwashing can be
enabled at pre-fixed intervals or as soon as a given
pressure drop is reached between the inlet and outlet
manifolds. For further details, please consult the
manuals of the control unit and of the differential pressure gauge.
Fig.1 - Filtering stage
Fig.2 - Backwashing stage
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1.1.3 Operating conditions of the automatic filter
Maximum working pressure:
Capacity:
10 bar a 20°C
2” : 20 m3/h
3” : 30 m3/h
2,8 bar
1400 cm2
80 mesh (180 microns)
Minimum backwashing pressure:
Filtering surface:
Filtration rating:
Pressure drop diagram - Automatic filter
0,7
0,6
ΔP [bar]
0,5
0,4
2”
3”
0,3
0,2
0,1
0
0
10
20
30
40
50
60
70
80
90
Flow rate [m3/h]
*Curves obtained during lab tests with 90° filters, free discharge, 120 mesh
disks and clean water at a temperature of 20°C.
Backwashing flow rate
10
9
8
ΔP [bar]
7
6
5
4
3
2
1
0
5
6
7
8
9
10
11
12
13
14
15
Flow rate [m3/h]
*Curves obtained during lab tests, free discharge, 120 mesh disks and clean water at a temperature of 20°C.
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1.2 Technical characteristics of the filtering station
The figure below shows the characteristics of the filtering station and the most important
dimensions for installation purposes.
2”
3”
6
Code
Capacity No. of
ØC
[m3/h]
filters Manifold diam.
A
B
E
G
[mm]
[mm]
[mm]
[mm]
H
[mm]
L
[mm]
IFRSL202LVPEL
40
2
4” – 110
831
783
284
720 1720
630
IFRSL203LVPEL
60
3
4” – 110
831
783
284
720 1720
845
IFRSL204LVPEL
70
4
4” – 110
831
783
284
720 1720 1120
IFRSL205PFPEL
90
5
6” – 160
856
808
284
720 1790 1512
IFRSL206PFPEL
110
6
6” – 160
856
808
284
720 1790 1787
IFRSL207RFPEL
140
7
8” – 200
876
828
284
720 1830 2093
IFRSL208RFPEL
160
8
8” – 200
876
828
284
720 1830 2318
Code
Capacity No. of
ØC
[m3/h]
filters Manifold diam.
A
B
E
G
[mm]
[mm]
[mm]
[mm]
H
[mm]
L
[mm]
IFRSL302LVPEL
60
2
4” – 110
831
783
284
720 1720
630
IFRSL303PFPEL
90
3
6” – 160
856
808
284
720 1790
962
IFRSL304PFPEL
120
4
6” – 160
856
808
284
720 1790 1195
IFRSL305PFPEL
120
5
6” – 160
856
808
284
720 1790 1510
IFRSL305RFPEL
150
5
8” – 200
876
828
284
720 1830 1510
IFRSL306RFPEL
180
6
8” – 200
876
828
284
720 1830 1775
IFRSL307RFPEL
210
7
8” – 200
876
828
284
720 1830 2050
IFRSL308RFPEL
220
8
8” – 200
876
828
284
720 1830 2325
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1.2.1 Components of the filtering station
The figure below shows all the main components of the Rotodisk® Automatic filtering stations.
Descrizione
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Ref.
Front foot
Lock bolts
Inlet manifold
Victaulic connection 3”
3-way water valve 3”
Elbow 1/4 x 6x8
Compression elbow with male threaded by-pass
M/F adapter 3/4” x 1/2”
Finger filter 1/4" x 1/8”
Street elbow ¾” x ¾”
Single-union PVC valve - male/female
Solenoid valve filter
Adapted elbow 3/4" x 1/2"
T 1/8 x 6/8 x 6/8
Air valve SE 1”
Male/female enlarging piece
Rotodisk Automatic filter 3”
Glycerol pressure gauge 0–10 bar
Outlet manifold
Automation unit
Rear foot
0HPDA0707116A
0FC0L7HVLI02A
OHVIC00000900
IAVCL0000039G
IAG0M00000Z46
IQ21920M0N63G
IR62220D0N25B
IARMF00000CZ0
IAFLS00000ZY0
IR62720D0N250
IV3MF11D0N250
IIFLC2SM2PC15
IR62120F0N25B
IARMF00000CZ0
IATCM00000Y68
IISSE00000320
IR62520D0N25D
IFTAFIELV2F0N
IIPGG00000100
0FC0L7HVLI02A
0HPDA0707500P
NOTE: These codes refer to the filtering station model IFRSL302LVPEL, as shown in the
figure. For a detailed list of the available components and spare parts, please
consult the catalogue of filtering systems.
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1.2.2 Operating principle of the filtering station
During the filtering stage the automatic filter battery works like a standard manual disk filter
battery: the water is filtered (from the outside of the filtering medium) by filters grass, according to the following diagram (suspended matter is stopped by the external surface of the
disks).
For example, in case of backwashing of the filter n. 1, the 3way valve positioned on the filter n. 1 is activated by the control unit and reverse the flow of water passing through the filter n. 1. The clean water from filter n. 2 and 3 crosses the filter
n. 1 (from the inside of the filtering medium), so as to remove
the dirt from the external surface of the disks.
The backwashing stage, which makes it possible to clean every single filter, requires the
installation of 3-way valves on the inlet manifold, so as to reverse the flow of water passing through the filters. The 3-way valves are controlled by the control unit, that makes it
possible to preset:
1) the interval between a complete backwashing cycle and the next one;
2) the duration of the backwashing stage for every single filter;
3) the interval between the backwashing of a single filter and the next one
(during the same cycle).
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2. Assembly of the filtering station
Identify the different parts of the filtering stations, as shown in the figure on page 7 and please refer to these instructions for a correct assembly and start-up of the system.
WARNING:
The filtering station shall be installed on a sturdy flat horizontal surface, if possible indoor. Make sure that the place of installation does not hinder the assembly and maintenance
operations.
When delivered, the filtering station is partially assembled. To complete mounting, proceed
as follows:
1) Remove all parts from their original package.
2) Insert the feet into the relevant seats of the manifolds and secure them with the screws
provided. The front and rear feet have not the same length: the longer feet shall be
inserted in the manifold connected to the 3-way valves, while the shorter feet shall be
inserted in the manifold connected to the filters.
3) Insert the filtering media inside the filter bodies, after greasing the seals with silicone grease.
4) Grease the seal positioned at the base of the cover and close the filter. Clamp the
mounted parts with the metal band.
5) Prepare the drain by connecting the relevant PE tubing (Ø 63 mm) to the elbows on the
3-way valves. Make sure that the drain piping is free and not under pressure (fig. 5), and
that the distance between the valve outlet and the drain pipe outlet (h min.) is at least
70 cm (fig. 3) Please respect this distance also when, due to the overall dimensions of the
system, the manifolds’ feet must be shortened (fig. 4).
Fig.3
Fig.4
Fig.5
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6) Install the filtering station on a flat surface, if possible (fig. 6), and do not tilt it in such a way
that the 3-way valves’ outlets are facing upwards (fig. 8).
7) Connect the inlet and outlet manifolds of the filtering station to the system. Secure the feet
to the ground, after checking that the selected position is compatible with any future maintenance operations (see chapter 4).
8) If necessary, use a safety valve on the inlet manifold and/or a check valve downstream
from the outlet manifold. Furthermore, it is advisable to install a safety filter downstream from
the filtering station or upstream of the different sectors of use.
Fig.6
Fig.7
Fig.8
WARNING:
Please adopt the necessary precautions to make sure that filters are NEVER subject to
water hammer phenomena and pressure peaks exceeding the maximum recommended
pressure.
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If the automation kit is delivered together with the filtering station, the necessary wiring and hydraulic connections
between the control unit, the solenoid
valves and the differential pressure
gauge are already preset. Simply complete them, as shown schematically in
the figures below.
For a proper execution of the hydraulic
connections, follow the diagram and
refer to the labels stuck on micro-pipes
and to the symbols available on the differential pressure gauge and on the valves.
Solenoid valve
Discharge
Differential
pressure gauge
Fig.9
Differential
pressure gauge
Fig.10
Solenoid valve 1 Solenoid valve 2
Solenoid valve n
NOTE:
For further information on the wiring, please refer to the manual of the control unit. If the filtering station is delivered without the automation unit, please refer to the documentation dealing
with the electric and electronic components to be used. Anyway, make sure that the hydraulic
connections indicated in fig. 9 are performed properly.
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3. Start-up instructions
3.1 General recommendations
- Before starting the system, make sure that all its components have been assembled
properly.
- Use the transparent polycarbonate cover (if provided) only for short inspections or
maintenance operations. Do not keep the transparent cover on the filter when the station
is off: the exposure of the disks to sunlight is likely to facilitate the growth of algae,
reducing the filtration efficiency.
- Make sure that the filters’ metal bands are closed.
- Set the pressure difference on the differential pressure gauge so that it exceeds by approx.
0.3 bar the value detected by the differential pressure gauge under normal working
conditions, with clean filters (the ideal value depends on the quality of the water to be
treated and the number of available filters).
- Set a backwashing time sufficient for a thorough cleansing of the filtering media. As a rule
a 60-90 sec. backwashing is recommended for a thorough cleansing of the filter. Conduct
some tests in order to determine the best conditions, according to the type of water to be
treated.
3.2 Nominal operating conditions
Maximum working pressure:
Minimum backwashing pressure:
Recommended backwashing time:
Backwashing flow rate (at 3 bar):
12
10 bar a 20°C
2,8 bar
> 60 sec
145 l/min (8,7 m3/h)
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4. Maintenance
The Rotodisk® Automatic filtering station requires a regular maintenance according to the
water quality and the working conditions, so as to ensure perfect and continuous operation
over time. The water quality may change over the time, and the filter’s operating conditions
may change accordingly, as well as the frequency of maintenance operations. It is recommended to have maintenance operations performed by qualified personnel, according to the
instructions given throughout this manual.
WARNING:
Every single maintenance operation shall be carried out with the system stopped, after
releasing the pressure inside the filters.
1) Cleaning the filtering medium
a) Release the metal band and remove the cover of the filter. Remove the disk medium.
>
During this operation, be sure that no waste matter falls inside the filter, as it could be recirculated after the subsequent start-up. To prevent this problem, it is recommended to carry
out a backwashing phase just before proceeding with this operation; after removing the cover
take the waste matter away from the cartridge base, using a jet of clean water.
b) Unscrew the screw in the upper part of the filtering medium,
being careful with the spring tensioned inside the system.
Do not compress the propeller.
>
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4. Maintenance
c) Take the screw out of the pressure plate, disengaging the
guard, the spring and the spacer.
>
d) Take the pressure plate and the disks out of the support. Wash all components with
plenty of clean water. Remove the scale, if any, with a soft brush.
>
e) Grease the head of the cartridge, the screw shank and all seals with silicone grease.
>
f) Reassemble the medium, according to the diagram shown on page 3, and make sure
that the initial configuration of the whole unit is restored. Grease the seat of the
cartridge and its seal. Grease the seal
located on the cover.
14
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4. Maintenance
2) Cleaning the valve filter
The filter positioned on the inlet manifold supplies the water for the
hydraulic control of the valves and the differential pressure gauge.
Clean it regularly in order to prevent any malfunctions of the solenoid valves. Unscrew the cover of the filter positioned on the bottom
or on the side of the manifold. Take out the filtering medium and
wash it thoroughly. Clean the cover and the interior of the filter with
a jet of clean water. Reintroduce the medium into the filter body,
being careful with the direction of insertion: the part to be fitted into the cover has the shorter inside diameter. Screw up the cover, and place the seal in the correct position.
3) Cleaning the air valve
Unscrew the valve from the filter cover. Open the valve, by unscrewing its two parts. Take out the float by removing the seal from the
valve body. Wash all components with plenty of clean water.
Check that the drain hole is free.
Reassemble the valve being careful with the correct positioning of all
components. Clean the threaded part (3/4”) and attach the valve to
the cover again using a teflon tape.
WARNING
At the end of each maintenance operation requiring the disassembly of any
components, restore the initial configuration.
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Rotodisk - Irritec

Transcription

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