ROTORFLUSH RF300AR-E User manual

Rotorflush Filters Ltd, Langmoor Manor, Charmouth, Dorset, DT6 6BU, UK
Tel [phone] Fax [phone] 560110 Email: [e-mail]
Company registration: 07472511 VAT No.: 675804603
www.rotorflush.com
1 | P a g e
RF300AR-E
INSTRUCTIONS

2 | P a g e
RF300ARe Instructions v21
Installation and s rvicing instructions
Rotorflush RF300AR self-cleaning filter
1. G n ral Saf ty Warnings
Please pay particular attention and care to the following signs
DANGER Improper use may lead to electric shock
Electric Shock Risk
DANGER Improper use may cause serious injury to people or damage to property
FAILURE TO OBSERVE THESE WARNINGS AND/OR ANY TAMPERING WITH THE FILTER EXEMPTS
ROTORFLUSH FILTERS FROM ALL RESPONSIBILITY IN THE EVENT OF PERSONAL INJURY OR DAMAGE
TO EQUIPMENT OR PROPERTY AND/OR TO THE FILTER
Read this manual carefully and check to ensure that the Filter has been properly installed and
connected in accordance with relevant safety standards before starting the Filter.
There are no RESIDUAL RISKS with Rotorflush Filters
No particular technical skills are required to use Rotorflush Filters.
No personal safety devices (precaution devices are required to use Rotorflush Filters
i. Pr v ntativ M asur to b Tak n by th Us r
The user must specifically comply with all the accident prevention regulations in force in the
respective countries in which the Filter is being used.
a. During operation make sure that nobody is in the water
b. Before undertaking any repairs or maintenance to the Filter, isolate the
electricity supply by removing the plug from the socket and/or turning off the
switch (if provided . This will prevent accidental starting which could cause
personal injury or damage to equipment or property.
c. Any maintenance operation, installation or moving the Filter with the
electrical system live may cause serious injury and could prove fatal.
d. During operation, avoid moving the Filter.
e. Before using the Filter, always check that the cable and all electrical devices
are in perfect working order.
f. When starting up the Filter (by turning on the switch, if provided, or by
inserting the plug in the socket ensure (i you do not have wet hands (ii you
are not standing in water and (iii you are not barefoot.
g. The user must not carry out under his/her own initiative any operations or
tasks not contemplated in this manual.

3 | P a g e
RF300ARe Instructions v21
ii. Significant Prot ction and Pr cautions
(as per EEC 98/37 p. 1.1.2 and 1.7.2; EN 292-2 p.5 .
Rotorflush filters are designed so that all moving parts are shrouded by
protective casings. Rotorflush Filters declines all responsibility in the event of
injury or damage caused as a result of tampering with these devices.
Each lead or live part is electrically insulated to earth; there is also a further
safety device in that the accessible conductive parts are connected to an
earth lead so that the parts within reach cannot become dangerous in the
event of failure of the principal insulation.
2. S rvicing and Installation saf ty pr cautions
Before installing or servicing the filter observe safety precautions:
i. Wear gloves to protect hands against the risk of injury from any sharp filtrate particles etc and
contamination from any bio-hazards which may be present.
ii. Wear safety shoes to protect against injury to feet if the Filter is accidentally dropped.
iii. Wear safety glasses to prevent eye injury.
iv. Take special care to minimise risks to health from any bio-hazards which may exist due to the
operating conditions of the Filter Recommended precautions include
v. Thoroughly clean all external surfaces of the Self-Cleaning Filter and if appropriate, disinfect the
pump and filter unit by immersing it in a proprietary disinfectant in accordance with the
manufacturer's instructions.
vi. Damp down the filter to minimise the airborne dispersion of any filtrate particles.
Wear a suitable face mask to prevent inhalation of any filtrate particles etc.
vii. Thoroughly wash hands.
ix. Do not eat, drink or smoke in the work area.
3. D scription
i. The Self-cleaning filter is designed for use with centrifugal pumps as a pre-filter attached to the
end of the suction hose. It has an internal cleaning rotor which continually backflushes the filter
screen. The cleaning rotor is powered the integral backwash pump
ii. Construction:
Filter cage 304/316 stainless steel
Cleaning Rotor 304/316 stainless steel with rubber jets
Bearing Acetal Copolymer/304/316 stainless steel
Filter screen: Sintered or Woven Stainless steel mesh. 50/100/315 micron, 0.5-
3mm

4 | P a g e
RF300ARe Instructions v21
4. Flow rat s and pr ssur s
i. The maximum usable flow through the filter, (with standard 300 micron screen , 560 litres per
minute, depending on the total suspended solids contained in the fluid and the type of solids,
(fatty/ sticky solids will reduce performance
5. Installation
Please observe safety precautions as detailed under “s rvicing and installation saf ty pr cautions”
above.
i. DANGER – RISK OF ELECTRIC SHOCK. When installing, please ensure the filter is disconnected
from the power supply
ii. Filter positioning:
In Tanks:
It is important that there is enough room around the filter for solids backwashed from the screen
to move away from the filter. When positioning in a tank there should be a minimum of 300mm
between the outside diameter of the filter and the sides of the tank. It should be kept out of any
debris that may settle at the bottom of the tank.
In Flowing Water:
Where the filter is positioned in flowing water, solids backwashed from the filter will be taken
down stream and will not build up. It is still important to have space around the filter and we
would recommend a minimum of 150mm between the outside diameter of the filter and the sides
of the channel that it is sited in.
iii. Pipe connections:
Connect the suction pipe from the pump to the 2 ½ inch B.S.P. pipe which is off-centre at the top
of the filter.. A 2 ½ inch non- return valve should be fitted in the suction line near to the filter. It is
important that when the main pump is switched on the backwash pump is also switched on so
water is immediately being supplied to the flushing rotor inside the filter
iv. Prime pump and run.

5 | P a g e
RF300ARe Instructions v21
6. El ctric Conn ction
i. Ensure that the Voltage and Frequency of the electric supply is the same as that on
the rating plate on the pump. (READ RATING PLATE)
ii. Installer must make sure that the electricity supply has an earth/ground wire
conforming to the current laws
iii. Make sure that the electricity supply is provided with a high sensitivity circuit
breaker
a. Ov rload Prot ction
The Rotorflush Filters single phase 110V and 220-240V have a built in thermal overload with
automatic reset. However a correctly rated fuse or overload protection must be installed in the
supply to the pump in addition to the pump’s thermal protection
The Three Phase versions of Rotorflush Filters can be protected by using a magneto-thermic
motor protector or a contactor with thermal relay. In either case they have to be rated
conforming to the nominal power as shown on the pump rating label.
b. Conn ction Diagram (S Fig.2)
1 Start (green
5 Supply cord
9 White
2 Run (red 6 Grommet 10 Light Blue <line>
3 Common (black 7 Plug 11 Brown <line>
4 Capacitor 8 Yellow-green 12 Float Switch

6 | P a g e
RF300ARe Instructions v21

7 | P a g e
RF300ARe Instructions v21
7. Troubl Shooting
FAULT POSSIBLE CAUSE REMEDY
Motor do s not run 1. No electricity
supply
2. Incorrect electric
connection
3. Circuit breaker has
tripped
4. Impeller Blocked
5. Motor or capacitor
damaged
1. Check Supply
2. Check connections
3. Re-set circuit breaker, if it
trips again call electrician
4. Check Filter Mesh for
damage. If damaged contact
Rotorflush
5. Contact Rotorflush
Motor runs but no wat r
d liv r d
1. Filter Blocked
2. Non Return Valve ( if
fitted blocked
1. Clean Filter. Reduce suspended solids
in water. There is no need to
dismantle the filter. Restrict pump
output, filter will block less with a
reduced flow through pump.
2. Check filter mesh for damage and clean
valve
Int rmitt nt op ration
(singl phas v rsions)
1. Impeller obstructed
2. Liquid Temperature
too high
3. Motor broken
1. Check Filter Mesh for
damage. If damaged call
Rotorflush
2.Reduce temperature of liquid
3.Contact Rotorflush
8. Maint nanc
i. Cl aning of tanks
As the filter is withdrawing water from the tank and leaving solids behind in the tank, the
concentration of solids in the tank will increase. Unless the tank is cleaned out the increased
solids concentration will eventually block the filter. Tanks either need to have a flow through
them to take solids away, or they need to be cleaned out regularly.
ii. Cl aning Filt r Scr n
Over a period of time the filter screen may become blocked with small particles that the self
cleaning mechanism is unable to remove.
Stainl ss St l Scr ns: Clean the outside of the filter using a pressure washer, or even better a
steam cleaner. Thoroughly clean the outside of the filter screen.

8 | P a g e
RF300ARe Instructions v21
iii. Maint nanc duration for Scr ns:
The 100 micron and 50micron screens will need pressure washed every 1000 hours of operation.
The 300 micron nylon screens every 5000 hours. For large mesh size duration will depend on
mesh size and the environment the strainer is in but every 5000 hours is an average guideline.
New mesh screens are available from Rotorflush Filters Ltd
iv. S rvicing th cl aning Rotor
Over a period of time, there may be a decline in the cleaning performance of the filter and
blockage may occur. This can be due to a build up of detritus in the jets of the cleaning rotor.
Remove the Strainer from the water source and clean the unit thoroughly with a pressure
washer.
Remove backwash pipe by undoing the union on top of the filter.
Remove the top plate of the filter (the plate with the suction and return pipes , by unscrewing
the 10x M6 bolts and remove the top plate from the filter cage.
IMPORTANT NOTICE: Pay attention to the direction to the Jet Clips and the distance they are set
away from the inside of the Cage (approx. 6-8mm as this is critical to the backwashing system.
Turn the cleaning rotor so that the ends line up with the cut away parts of the filter cage and
remove the cleaning rotor from the filter. As shown below (left .
If the jets appear blocked or excessively dirty - Using a high-pressure hose blast water through
the hole in the top of the cleaning rotor to remove detritus.
If the Backwash Jets are damaged and require replacement. Undo the Jubilee clips using a 7mm
spanner and remove the damaged Jets replacing them with new jets. Make sure orientation and
positioning is correct before retightening the Jubilee clips. Once again check fitment is correct as
with tightening the Jets may deform and become misaligned. Is this is the case undo, adjust and
retighten.
Spar parts ar availabl from Rotorflush Filt rs Ltd.
The Backwash Rotor can now be refitted into the filter and the Top plate reattached. This unit can
now be reinstalled to the water source.
*If in doubt or you encounter difficulties please feel free to contact
Rotorflush Filters Ltd.

9 | P a g e
RF300ARe Instructions v21

10 | P a g e
RF300ARe Instructions v21
R placing Stainl ss St l M sh
Pl as not for g n ral cl aning th filt r m sh do s NOT n d to b
r mov d. Simply r mov d bris with a pr ssur wash r.
The Stainless Filter Mesh has sharp edges wear gloves to protect from cuts
1. Remove the 7x M6 nut and bolts on the tabs of the Clamp on the filter cage and remove the outer
clamping ring.
2. Remove the Clamp and damaged mesh. (as shown above Clean the inner filter Cage and Clamp surfaces to
aid fitment of new mesh.
3. Place the Stainless filter mesh (available from Rotorflush Filters around the filter cage. Ensuring that the
joint is in line with a cage upright as shown below.

11 | P a g e
RF300ARe Instructions v21
4. Place the outer clamp over the filter mesh with the clamp tabs the opposite side of the filter to the mesh
joint to ensure maximum clamping force on the mesh joint.
5. This is the fiddly bit!!
The outer clamping rings apertures MUST line up with the inner filter cage apertures. The ends of the Stainless
mesh MUST be positioned so that they line up with one of the uprights between the apertures.
Have a pair of mole grips handy, so that when is all in the correct position you can clamp the tabs on the outer
ring to hold all in position and re-adjust as necessary. As shown below.
6. Double check that the ends of the filter mesh are not visible and are firmly behind one of the uprights. If
they are visible then there will be a gap where larger particles can enter the filter.
7. When all Clamp and Mesh fitment is correct, reinstate the 7x M6 nuts and bolts in the outer clamp and
tighten.
8. Re-check alignment of the Cage, Clamp and Mesh joint with the upright columns.
Please note that failure to do these alignments will cause reduced flow and/or larger particles to enter the
pump. Either way this will eventually lead to a pump failure.
If there is a miss-alignment please go back to step 1.
*If in doubt or you encounter difficulties please feel free to contact
Rotorflush Filters Ltd.

12 | P a g e
RF300ARe Instructions v21
NOTES.