WilTec 51792 User manual

Operation Manual
Sand Filter
51792 (without pump), 51793 (with pump)
Illustration similar, may vary depending on model
Read and follow the operating instructions and safety information before using for the first time.
Technical changes reserved!
Due to further developments, illustrations, functioning steps and technical data can differ insignificantly.
Updating the documentation
If you have suggestions for improvement or have found any irregularities, please contact us.

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The information contained in this document may alter at any time without previous notice. It is prohibited
to copy or spread any parts of this document in any way without prior written allowance. All rights re-
served.
The WilTec Wildanger Technik GmbH cannot be held accountable for any possible mistakes in this
operating manual, nor in the diagrams and figures shown.
Even though, the WilTec Wildanger Technik GmbH has undergone biggest possible efforts to ensure
that the operating manual is complete, faultless and up to date, mistakes cannot be entirely avoided.
If you should find a mistake or wish to make a suggestion for improvement, we look forward to hearing
from you.
Send an e-mail to:
[email protected]
or use our contact form:
https://www.wiltec.de/contacts/
The most recent version of this manual in various languages can be found in our online shop via:
https://www.wiltec.de/docsearch
Our postal address is:
WilTec Wildanger Technik GmbH
Königsbenden 12
52249 Eschweiler
Germany
Do you wish to pick goods up? Our pick-up address is:
WilTec Wildanger Technik GmbH
Königsbenden 28
52249 Eschweiler
Germany
To shorten the waiting time and allow for a rapid on-site transaction, we ask you to call us previously or
placing your order via the webshop.
E-mail: [e-mail]
Tel:[phone]
Fax: [phone]
To return orders for exchange, repair or for other purposes, please use the following address. Attention!
To allow for a smooth execution of your complaint or return, it is important to contact our customer
service team before returning the goods.
Returns Department
WilTec Wildanger Technik GmbH
Königsbenden 28
52249 Eschweiler
E-mail: [email protected]o
Tel:[phone]
Fax: [phone]

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Introduction
Thank you for purchasing this quality product. To minimize the risk of injury we urge that our clients
take some basic safety precautions when using this device. Please read the operation instruc-
tions carefully and make sure you have understood its content.
Keep these operation instructions safe.
Safety instructions
BEWARE:
The use of this device is allowed on standing water bodies, garden ponds, or swimming ponds and their
surrounding areas only with fault current protection-switch with a triggering nominal current up to 30 mA
(according to VDE 0100 article 702 and 738).
The device is not intended for use by persons (including children) with impaired or limited physical,
sensory, and mental abilities or lack of experience and/or real knowledge, unless they are supervised
by a person responsible for their safety or unless they follow the instructions made by this person on
how to use the device correctly. Children should be supervised to make sure that they do not play with
the device.
ATTENTION:
•Run a visual inspection of the device before every use. Do not use the device if the safety
appliances are damaged or worn out. Never override safety regulations.
•Only use the device accordingly to the intended purpose stated in the instructions for use.
•You are responsible for the safety inside the working zone.
•If the cable or the plug is damaged due to external influences, the cable must not be repaired,
but must be replaced with a new one. This work can only be carried out by an electrician.
•The voltage of 230 V AC indicated on the type plate of the device has to correspond to the
existent mains voltage.
•Never lift, carry, or fix the device by using the power cable.
•Make sure that the electrical plug connection is protected from flood and moisture.
•Before working on the pond filter, disconnect the device by pulling out the plug.
•Avoid exposing the device to a direct water jet or rain.
•The user is responsible for the compliance with local safety and installing regulations. Ask an
electrician.
•Damage arising from flooded rooms caused by dysfunctions of the device must be avoided by
means of the appropriate measures (e.g., installing an alarm system, a reserve pump).
•In case of malfunction, repair works can only be carried out by a qualified electrician.
•The device must not run dry or with an intake port completely closed. The manufacturer’s war-
ranty is no longer valid if the damage is caused by dry running.
•The device must not be used for drinking water circuits.
•The device has to be installed out of water.
•You have to make sure that the filter cannot fall into the water.
•You have to make sure that the filter is not exposed to direct sunlight.
•The pond pressure filter has to be horizontally fixed with screws on a suitable mounting place.
•The universal-hose stepped tails can be shortened according to the hose diameter if necessary.
•Attach hoses and hose clamps.

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WARNING:
•Carefully read all the safety guidelines and the instructions. Non-compliance with the safety
rules and regulations can lead to an electric shock, fire, and/or serious injury.
•Keep the instructions and the safety guidelines in a safe place in case you need them in the
future.
Working principle
Incoming water from the piping system is automatically directed by the multiport valve to the top of the
filter bed. As the water is pumped through the filter sand, dirt and debris are trapped by the filter bed
and filtered out. The filtered water is returned from the bottom of the filter tank, through the multiport
valve and back through the piping system.
How to install the filter tank
1. Mount the sand tank to sand filter support according to the instruction below.
2. Insert the pump base to the sand filter support in the correct direction.

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3. Insert the tube with the diffuser body inside the tank as the picture shows; then place the funnel on
the tank mouth and pour quartz sand into the tank (sand weight 19 kg).
4. Take away the funnel, then carefully clean the tank neck and fix the valve with the O-ring through
the flange clamp set. (The pump port on the valve needs to point towards the pump.)
5. Connect the sand tank to the pump with the hose, hose clamps, and hose adaptors.
(1) Pump port

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Installation notes
•Make sure that the max. working pressure is not exceeded. Use a pressure control valve when
the system has a booster pump.
•If the pump position is higher than the water level, a back-water control valve must be installed.
•If the pump position is lower than the water level, an isolation valve must be installed. It could
stop the water return while the device is inspected.
•Make sure that the connecting adaptors and hose are as little bent as possible, connections
should be shortened.
•Ensure that solvents are not excessively applied to fittings as these, touching the O-ring, might
cause sealing problems.
•Do not over-tighten fittings or adapters
Commissioning
1. Inspect all connections to see if they are correct and secure.
2. Press the adjustment handle upwards and to BACKWASH position.
3. Install and start the pump accordingly to the instructions.
Note: All suction and discharge valves must be open when starting the system. Failure to do so
could cause injuries. Make sure that the filter vessel is filled with water before starting up the
pump, or the pump will be damaged.
4. Once water steadily flows out of the waste line, run the pump for at least another 2 min. The
initial filter back-washing is recommended to remove any impurities out of the sand.
5. Set the adjustment lever to RINSE position. Start the pump and operate it until the water in the
sight glass is clear (after about 1½ to 2 min).
6. Turn the pump off, set the adjustment handle to FILTER position, and restart the pump. The
filter now operates in the normal filter mode, filtering particles from the pool water.
NOTES:
•Note the initial pressure gauge value when the filter is clean. It will vary depending upon the
pump and pipes. As the filter removes dirt and impurities from the pool water, the accumulation
in the filter will cause the pressure to rise and flow to diminish.
•When the pressure gauge value is 0.55–0.69 bar (8–10 psi) higher than the initial “clean” pres-
sure noted, it is time for a filter backwash (cleaning).
•IMPORTANT! To prevent unnecessary strain on pipes and valves, always shut off the pump
before changing the adjustment handle position.
•To prevent quick wear and tear or damage to the pump and filter and for proper operation of the
system, regularly clean the pump filter and skimmer baskets.
Filter control valve functions
FILTER
Set valve to FILTER for normal filtering.
BACKWASH
For cleaning filter. When filter pressure gauge rises 0.55–0.69 bar (8–10 psi) above
start-up (clean pressure), stop the pump, set the handle to BACKWASH. Start the pump
and backwash until the water in the sight glass is clear (approx. 2 min or less depending
on the dirt accumulation).
RINSE
After backwashing, with the pump switched off, set the valve to RINSE. Start the pump
and operate it for about 2 min. This ensures that all dirty water from backwashing is
rinsed out of the filter to waste, preventing a possible return to the pool. Stop the pump,
set the valve to FILTER, and restart the pump for normal filtering.
WASTE
To bypass filter for draining or lowering water level and for suck heavy debris directly
to waste.

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Exploded view and parts list
№
Name
1
Filter head and multifunction valve
2
Clamp assembly
3
O-ring
4
Sand tank
5
Diffusor assembly
6
Drain plug
7
Hose
8
Hose clamp
9
Hose adaptor
10
Pump
11
Sand filter support
12
Gauge assembly

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Troubleshooting
Problem
Cause
Solution
Filter leaks through the hose
terminals
Improper connection between
the terminals and the hoses
Insert hose terminals up until the
bottom of housing and tighten
clamps.
After the filter has started up,
there is no flow in the feedback
nozzle.
The valve is not on the filtration
setting.
Disconnect filter and place valve
on correct setting.
Filter is above the level of the
unprimed water.
Place filter in correct position and
prime it.
Suction cover or skimmer plug
has been inserted.
Remove suction cover or skimmer
plug.
Intermittent operation
Low water level on skimmer
Fill pool and prime filter.
The filter is not primed.
Prime filter.
Low flow rate of filter
Due to use, the filter is dirty.
Perform backwash.
The filter is not primed.
Prime filter.
Water comes out through the fil-
ter opening.
Dirty connection between the
valve and the filter
Clean sand from opening, properly
insert coupling on valve and firmly
tighten metal band.
Lose metal band
The filter valve leaks through
the drain terminal.
Inner coupling damaged due to
improper use of chemical prod-
uct.
Change top valve cover. Do not
put chemical products in prelimi-
nary filtration skimmer basket.
Valve head broken due to im-
proper use (over-tightening).
Valve head broken due to im-
proper use. Change valve head.
Do not over-tighten!
Motor will not start up, there is
not any noise or vibration.
No current in the electrical line.
Check that there is current in elec-
trical line.
Motor will not start up, a buzzing
sound can be heard.
Motor damaged
Contact a qualified person.
Water leak
Leaking spot
Check hose clamps.
If leak is between the pump and
the motor, contact qualified per-
son.

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Disposal regulations
EU guidelines regarding the disposal of scrap electric appliances (WEEE, 2012/19/EU) were imple-
mented in the law related to electrical and electronic equipment and appliances.
All WilTec electric devices that fall under the WEEE regulations are labelled with the crossed-out
wheeled waste bin logo. This logo indicates that this electric equipment must not be disposed with the
domestic waste.
The company WilTec Technik GmbH has been registered in the German registry EAR under the WEEE-
registration number DE45283704.
Disposal of used electrical and electronic appliances
(intended for use in the countries of the European Un-
ion and other European countries with a separate col-
lection system for these appliances).
The logo on the article or on its packaging points out
that this article must not be treated as normal house-
hold waste but must be disposed to a recycling collec-
tion point for electronic and electrical waste equipment.
By contributing to the correct disposal of this article you
protect the environment and the health of your fellow
men. Environment and health are threatened by inap-
propriate disposal.
Material recycling helps reduce the consumption of raw materials.
Additional information on recycling this article can be provided by your local community, municipal waste
disposal facilities or the store where you purchased the article.
Address:
WilTec Wildanger Technik GmbH
Königsbenden 12 / 28
D-52249 Eschweiler
Important notice:
The reprint or reproduction, even of excerpts, and any commercial use, even in part, of this instruction
manual require the written permission of WilTec Wildanger Technik GmbH.