Harmopool ZFZX4920-P User manual

Produced by:
Zwembad BVBA
Industrieweg 9
3190 Boortmeerbeek
Belgium
www.harmopool.eu
SFERA Bobin Sand Filter

1
Table of content
Product description................................................................................................................................2
Assembly and installation ......................................................................................................................3
Preparation ........................................................................................................................................3
Installation .........................................................................................................................................5
Starting the filter kit.............................................................................................................................10
Maintenance ........................................................................................................................................11
Backwashing.....................................................................................................................................11
Using the valve.....................................................................................................................................12
FAQ.......................................................................................................................................................13
Appendices...........................................................................................................................................14

2
Product description
These instructions contain important information regarding safety. Please read the instructions
carefully before installing and using the filter. The filter is made to last for years with minimal
maintenance, provided that the installation and use takes place according to instructions in this
document.
Product specifications
Product code
ZFZX4920-P
ZFZX4930-P
ZFZX4945-P
ZFZX4960-P
Pump
4 m³/h
6 m³/h
9 m³/h
14 m³/h
Valve
6-way
6-way
6-way
6-way
Diameter (mm)
425
425
475
550
Filter media (kg)
50
50
75
75
Consumption (kW)
0.25
0.37
0.55
0.75

3
Assembly and installation
Preparation
1. Check if the packaging is in good condition
2. Carefully unpack the filter
3. Check if everything is in the box
○Filter body
○Pump
○Foot for the pump
○Connection hoses
○Valve and accessories to install
○Connections
4. Install the filter on horizontal soil. Take care having enough space around the filter to be able to
execute an easy maintenance.
5. Use sand of this grain size: 0,4 - 0,8 mm.
6. Check whether all internal parts are in good condition and are properly attached before you fill
the body.
7. Fill half the body with water before you fill it with sand or glass beads. Only then, the body is
filled gradually.
8. Once the body is filled with the right amount of sand or glass beads, the top part of the body
has to be cleaned thoroughly at the level of the filter valve.
9. Make sure all parts are dry. Apply a little bit of grease to the sealing ring and attach the valve to
the filter body.

4
Attention!
○Air inside the filter body or a malfunction of the valve can damage the valve or the
installation.
○Place the valve in such a way that the hoses can be connected properly.
○Connect the filter to the pump and use Teflon for a proper seal.
○The filter body can rupture or explode at a pressure of 2 bar. The maximal operating
pressure is around 1.5 bar. Therefore, never install a pump which puts more than 1.3 bar of
pressure on the filter body. Switch off the pump if the pressure rises above 1.5 bar.
○Never place the valve on the outlet of the filter/pump installation. A closed valve can cause
the filter to explode.
○Always keep chemicals at least 5 meters removed from the pump and filter. The chemical
fumes of these products can rust the parts causing damage to the valve, pump and filter.
○The electrical installation of the pumps has to take place according to local standards. The
distance between the swimming pool and the pump installation has to be at least 4 meters.
○For safety a 30 mA differential plug has to be present. The filter kit is used exclusively with
swimming pools.
○This filter combination works under pressure. When it isn’t assembled properly or if air is
present in the filter circuits, serious injuries can be the result.
○Regularly check whether the valve and the pipes are in good condition. Never use this
installation at pressure higher than 1.5 bar.

5
Installation
1. Assemble the body to the foot of the pump
2. Glue the collector to the distributor. Roughen the PVC and use degreaser for a better
adhesion. Use a sufficient amount of glue.

6
3. Assemble 2 distribution rods to the distributor and put everything inside the filter body.
4. Now assemble the rest of the distributor rods and put the distributor on the bottom. Fill
half the filter body with water. After, fill the other half with sand or glass beads without
sand or let glass beads fall in the PVC-pipe. Make sure that the PVC-pipe is still in its
straight up state.

7
5. Put the o-ring on the valve
6. Put the valve on the filter body and make sure the PVC-pipe is inside. Assemble the
clamp and tighten the valve properly.

8
7. Assemble the pressure gauge to the side of the valve.
8. Insert the screws through the holes of the foot of the pump and screw the
pump on it. This foot is used for multiple models. With some models the screws
don’t fit on the pump. By drilling additional holes in the foot, that problem is
resolved.

9
9. Saw the included flexible PVC-pipe in 2 adequate pieces. Glue these 2 pieces of PVC-pipe
into an elbow of 90°. Screw the included connection of 50 mm to the pump connection of
the valve. Use Teflon for an optimal sealing. Glue 1 end of the pipe into the connection of
50 mm and the other end into the connection with swivel to assemble to the pump. Screw
the connection with swivel onto the pump. Use Teflon for an optimal sealing. The end
result looks like this.
*With the right PVC-pieces, connections to other diameters are always possible.
10. The electrical installation can differ. Therefore there is no plug on the cable of the pump.
Depending on local legislation, you may use a standard plug, a differential plug or a direct
conection to the fuse box to provide the installation of power with a socket. We
recommend to use a differential plug for a safer installation.

10
Starting the filter kit
a. Clean the swimming pool before starting the kit
b. Check whether the filter body and the pre-filtration unit of the pump are filled with water.
c. Check whether the valve of the filter body is installed properly and make sure all air is out of the
pump.
d. Switch off the pump and change the position of the valve (switch off the pump every time before
you change the position of the valve).
e. Start the pump.
f. Filtration has begun. Check whether water is entering the swimming pool.

11
Maintenance
The filtering plays an important part in the proper functioning of the swimming pool. The filter installation
will last a long time if it is maintained correctly. Therefore respect following advice: If you want to perform
labours inside the body, first remove the sand before removing the valve.
Attention !
○The filter body operates under pressure. Never start working on the filter if it is still under
pressure.
○Filtering too little can cause turbid and green water. Never use air or a compromised gas. This can
cause the filter body to explode.
○A new filter can still contain fabrication impurities. It is recommended to clean the filter 48 hours
after commissioning.2. Backwashing too often can decrease the filter installation.
○Read the pressure off of the barometer. This upstart pressure is called the initial pressure. In most
cases the initial pressure is between 0.4 and 1 bar. This pressure depends on the power of the
pump, diameter of the filter body, lenght of the pipes, bends the pipes make and the cleanliness
of the sand. The initial pressure can never be too low. If all your devices work and are connected
correctly and your initial pressure is lower than 0.4 bar, you have provided a sublime installation.
○Sand has to be replaced every 4 years, glass beads every 6 years
Backwashing
1. Switch the valve from position after you have stopped the pump.
2. Verify whether the conduits are not pinched or in a knot and put the valve in ‘Backwash’mode
3. Start the pump
4. Backwash the filter 2 to 3.5 minutes
5. Stop the pump and put the valve in ‘Rinse’ mode
6. Start the pump and let it run for approximately 30 seconds
7. Stop the pump and put the valve on ‘Filter’
8. Restart the pump. The installation is now ready to do its job
Winter-treatment
In countries where the temperatures go below zero, it is necessary to perform a winter-treatment:
Backwash the filter
1. Stop the pump and put the valve on ‘Closed’
2. Open the purge valve beneath at the bottom of the body
3. Let all the water flow out of the filter body

12
Using the valve
Filter
Regularly check the pressure gauge. If your initial pressure has increased by 0.2
bar, it is time to backwash.
Closed
The valve is closed, communication with the pump is interrupted. You can now
open the lid of the pre-filtration unit of the pump.
Recirculation
In this position the water doesn’t pass through the filter body and flows
directly to the swimming pool.
Use this position when you have put products in the water, for a better distribution of the products.
Backwash
Thanks to the filter medium (sand or glass beads), impurities remain inside the
filter body. The more impurities inside the body, the higher the pressure and
the less well the water circulates. When your initial pressure has increased by
0.2 bar it is time to backwash. The contaminated water is drained to the gutter.
First rinse the pump once again with the Rinse-mode before filtering again.
Empty
In this position the valve sends the swimming pool water directly to the
gutter. This mode is used to empty the pool.
Rinse
After every backwash it is important that the filter medium is compressed.
Put the valve to ‘Rinse’ and start the pump again for 1 minute. Thereafter, put
the valve in the filter position and your installation is ready again for an
efficient filtration of the swimming pool water.

13
FAQ
Problem
Cause
Solution
Flow too low
The basket of the pump (pre-
filtration unit) is full
Clean the filter basket
The pump runs in the reverse
direction
Check the conduits of the pump
The system sucks too little
water
The pipes at the inlet are
clogged or partially clogged
Clean the pipes of the inlet of the pump
The pressure quickly
becomes too high during
filtering
The pH is too high
(turbid water)
Decrease the Ph (add Ph min)
Too little chlorine
Add chlorine
The pressure changes too
much
The pump draws air
Check the density of the hydraulic
connections
The suction valve is half closed
Fully open the suction valve

14
Appendices
SFERA 97505 - 97506
REF
BENAMING
DENOMINATION
DESIGNATION
BESCHREIBUNG
DENOMINACION
DENOMINAZIONE
A
FILTERVAT
FILTRE
FILTER BODY
FILTERKÖPËR
CUERPO FILTRO
CORPO FILTRO
B
PURGE
PURGE
PURGUE
ABWASSER
PURGA
PURGA
C
DICHTING
JOINT TORIQUE
"O" RING
"O" RING
JUNTA TORICA
"O" RING
D
MANOMETER
MANOMETRE
PRESSURE JAUGE
DRUCKMESSER
MANOMETRO
MANOMETRO
E
KRAAN
VANNE
VALVE
WECHVENTIL
VALVULA
VALVOLA
F
HALSKLEM
BRIDE
FLANGE
FLANSH
BRIDA
FLANGIA
G
COLLECTOR
COLLECTEUR
COLLECTOR
SAMMENLBEHÄLT
ER
COLECTOR
COLLECTORE
H
VERDEELARM
BRAS
ARM
VERTEILARM
BRAZO
BRACCIO

15
SFERA 97507 - 97508
REF
BENAMING
DENOMINATION
DESIGNATION
BESCHREIBUNG
DENOMINACION
DENOMINAZIONE
A
FILTERVAT
FILTRE
FILTER BODY
FILTERKÖPËR
CUERPO FILTRO
CORPO FILTRO
B
PURGE
PURGE
PURGUE
ABWASSER
PURGA
PURGA
C
DICHTING
JOINT TORIQUE
"O" RING
"O" RING
JUNTA TORICA
"O" RING
D
MANOMETER
MANOMETRE
PRESSURE JAUGE
DRUCKMESSER
MANOMETRO
MANOMETRO
E
KRAAN
VANNE
VALVE
WECHVENTIL
VALVULA
VALVOLA
F
HALSKLEM
BRIDE
FLANGE
FLANSH
BRIDA
FLANGIA
G
COLLECTOR
COLLECTEUR
COLLECTOR
SAMMENLBEHÄLT
ER
COLECTOR
COLLECTORE
H
VERDEELARM
BRAS
ARM
VERTEILARM
BRAZO
BRACCIO