WATTS Whof2 Multi-Stage Filters with Self-Cleaning Pre-Filters Instruction Manual

Whof2 Multi-Stage Filters with Self-Cleaning Pre-Filters
Instruction Manual Multi-stage filters with self-cleaning pre-filters
Installation manual
Installation, use and maintenance manual
WattsWater.eu

Whof2 Multi-Stage Filters with Self-Cleaning Pre-Filters

MULTI-STAGE FILTERS WITHSELF-CLEANING PRE-FILTERWHOF2

WattsWater.eu
https://wattswater.it/technical-support/user-manual/water-distribution- systems/20731/

Technical specifications

The self-cleaning pre-filter has a nominal filtration of 50 micron.
When the filtering element is clogged, it is simply cleaned by opening the valve on the bottom of the cup (figure 1).
This operations generates a depression in the filter that pushes the cartridge down, automatically reversing water flow from the inside (in counter-current) out of the cartridge (figure 2).
This water flow in counter-current carries particles and substances deposited on the cartridge to the drain. Closing the valve after a couple of seconds returns pressure distribution to its initial conditions and the internal spring returns the cartridge to its service position (figure 3).
The multi-stage filter features a drain funnel to prevent pollution by backflow, in accordance with European standard UNI EN 1717.filter to reach maximum pressure in counter-current and the best cartridge cleaning results.
WARNING
The above described operating modes and cleaning in countercurrent occur in excellent conditions with minimum 1.8 BAR supply pressure.
WARNING

• Only use the filter in the operating conditions indicated on the sticker on the filter bowl.

• If the sticker is tampered, damaged, not legible or missing, applicable working conditions are: max pressure 8 bar, max temperature 45°C.

• If pressure exceeds use limits, protect with a pressure reducer.

• Install an “anti-water hammer” system to protect the filter.
  In case of installation on systems powered by a pump and especially on those equipped with a pressure and flow controller, an additional expansion vessel must be installed upstream the filter to protect it from eventual repeated pressure peaks (figure C).

• Keep away from light sources.

• Keep away from excessive heat and cold.

General directions for use

• Only use self-cleaning filters to filter mains or well water and to filter sand and other large impurities from water with pH levels between 6.5 and 9.5. Do not use the filter to filter silt. Do not filter other liquids.
• Multi-stage filter is not a purifier: do not use to filter water intended for drinking if inlet water quality is not guaranteed for this use or if its origin and quality are unknown.

The range of multi-stage filters is made of double units with selfcleaning pre-filter.

Installation

WARNING

• Before the installation, carefully lubricate the housing o-ring which is located at the bowl top. Use an adequate foodgrade lubricant.
• Before the installation, check if the hydraulic system has been set-up according to the rules-ofthe art in force.
• Install the products in sheltered rooms and protected from freeze and excessive heat.

Refer to figures:
A. Applicable sealant and applicable fittings (depending on model)
B. IN – OUT directions presentation and vent-valve (VV) location
C. Installation lay-out (In case of installation without OneFlow® ; if present, install the OneFlow ® after the WHOF2 filter):

1. Municipal water mains
2. Non-return valve
3. Pressure reducer
4. By-pass
5. Anti-water hammer device
6. Multi-stage filters with self-cleaning pre-filter
7. Other utilities

Before installing the filter, it is strongly recommended the installation of a by-pass and shut-off valve, while keeping both the filter inlet and outlet closed.

• Screw the ball valve to the threaded port for discharge on the bottom of the housing, making sure that the gasket of the valve is in place, then screw the drain funnel or the plastic hose-holder to the ball valve, making sure that the gasket is in place.
• Avoid all kind of tensions by using wall brackets as a support.
• Connect the inlet to the product’s side with the indication IN and the outlet to the side with the indication OUT.
• Connect to pipes using cylindrical (parallel) fittings (BSP – ISO 228), possibly with flexible hoses.
• Connect to tapered (conical) fittings (ANSI/ASME B1.20.1) only if the product is marked with NPT on head.

WARNING
Only use tape to seal filter connections.

Connection to waste line

Connect a rubber tube to the drain funnel or hose fitting at the base of the filter, secure with a clamp and have it discharge into the drain (figures 4A and 4B). The drain point must be lower than the drain funnel or hose fitting. The rubber tube must not be more than 2 metres long.
WARNING
Avoid bending or pinching the rubber tube.

Filter start up

Proceed as follows:

• make sure there are no water leaks by gradually opening water supply to the filter;
• gradually fill the filter to about full and then release air in the filter by opening the breather screw on the head of the device. Close the breather screw when finished.

The filter is now ready for correct use.
WARNING
Make sure that there are no water leaks from the product, and especially control the tightening between the housing head and the housing bowl. Continue checking that the tightening is good and there is no water leakage for 48 hours following the installation and start-up. In case of leakage,open the housing, remove the o-ring from the bowl, place a new o-ring and apply lubricant, then re-tighten the bowl to head and repeat the leakage check as above. Ask your vendor for o-rings, lubricant and other spare parts. Remark: after the installation, slowly turn on a water supply (tap) downstream the installed unit and let the water flow for at least 5 minutes before the use.

Routine maintenance

Self-cleaning pre-filter (figures 1, 2, 3):
Clean the filter cartridge in counter-current by opening the drain valve for 15/20 seconds.
Repeat the operation with the same procedure one or more times until the desired cleanliness is reached. If acceptable cleanliness is not achieved for good filter operations, follow the extraordinary maintenance procedure described below.
WARNING
During cleaning operations discontinue the water supply by closing faucets or the bypass faucet downstream from the filter to reach maximum pressure in counter-current and the best cartridge cleaning results.
Post-filters (double):
Replace cartridges as indicated on the sticker of the cartridges; if the sticker is damaged, not legible or missing, operate as following:

• Sediment cartridges: replace with a new cartridge every 3-6 months or before if flow significantly reduces.

Self-cleaning pre-filter extraordinary maintenance

In time, extraordinary cartridge cleaning is required as follows:

• cut off water flow upstream from the filter;
• release filter pressure by opening the water tap downstream from the filter;
• open the filter unscrewing the cup from the head using the spanner
• remove the cartridge
• clean the cartridge under a jet of cold water and use a soft brush to remove most impurities;
• insert the clean cartridge in the cup;
• screw the cup onto the head;
• follow the procedure under “FIRST USE” to reuse the filter;

WARNING
Replace post-filter cartriges with new ones to complete the extraordinary maintenance of self-cleaning pre-filter.
WARNING
At re-start after every maintenance operation, when the filter’s bowl is unscrewed from head, change the o-ring with a new one and carefully lubricate before tightening the bowl to the head. Make sure that there are no water leaks from the product and especially control the tightening beteween the housing head and the housing bowl. Continue checking that the tightening is good and there is no water leakage for 48 hours following the installation and start-up. In case of leakage, open the housing, remove the o-ring from te bowl, place a new o-ring and apply lubricant, then retighten the bowl to head and repeat the leakage check as above. Ask your vendor for original orings, lubricant and other spare parts.
Remark: after the maintenance, slowly turn on a water supply (tap) downstream the installed unit and let the water flow for at least 5 minutes before the use.
WARNING
We recommend replacing stainless steel net cartridges at least every 36 months. The filter bowl must be replaced with a new one at least every 5 years.
Follow the local regulation in force when disposing cartridges and bowls.

Troubleshooting

Following are a series of problems that may occur due to incorrect installation or maintenance or improper use, possible negligence or due to filter or part wear.

•Bowl broken.
•Cut-off valves and/or
By-pass closed.| •Clean the cartridge following the extraordinary maintenance procedure
•Replace the bowl and o-ring.
•Open the closed cut-off valve or by-pass
Unfiltered water runs from faucets| •Cartridge broken.
•Spring broken.
•Cartridge gasket ruined.
•By-pass valve open.| •Replace the cartridge.
•Replace the spring.
•Replace the cartridge gasket.
•Close the by-pass valve.
The cartridge does not clean during self-deaning operation.| •Insufficient pressure in the bowl.
•Cartridge not correctly positioned in the bowl.| •Check the drain pipe: if pinched or bent, remove the problem.
•Rotate the cartridge clockwise or Counterclockwise so that it moves vertically without strain in the bowl.
Water leaks between the filter head and bowl.| •Bowl o-ring ruined.| •Replace the o-ring.
Water leaks from connec- tons between pipes and from the sides of the filter.| •Sealant (TEFLON) insufficient.| •Add a few turns of seal-ing tape.
Water leaks between the bowl and drain valve.| •Drain valve gasket damaged.| •Replace the gasket.

The descriptions and photographs contained in this product specification sheet are supplied by way of information only and are not binding. Watts Industries reserves the right to carry out any technical and design improvements to its products without prior notice. Warranty: All sales and contracts for sale are expressly conditioned on the buyer’s assent to Watts terms and conditions found on its website at www.wattswater.eu. Watts hereby objects to any term, different from or additional to Watts terms, contained in any buyer communication in any form, unless agreed to in a writing signed by an officer of Watts.

Guarantee

Watts products are thoroughly tested. The said guarantee covers solely replacement or – at the full sole discretion of WATTS – repair, free of charge, of those components of the goods supplied which in the sole view of Watts present proven manufacturing defects. The period of limitation for claims based on defects and defects in title is two years from delivery/the passage of risk. This warranty excludes any damage due to normal product usage or friction and does not include any modified or unauthorized repair for which Watts will not accept any request for damage (either direct or indirect) compensation (for full details see our website). All sales subject to the WATTS general terms and conditions to be found on www.wattswater.eu

CONTACTS

Watts Water Technologies EMEA B.V.
EMEA Headquarters
Strawinskylaan 3099
1077 ZX Amsterdam
The Netherlands
tel.: +31 (0)20 2626700
fax: +31 (0)20 2626799
www.wattswater.eu| Austria, Germany, Switzerland
Watts Industries Deutschland GmbH
Godramsteiner Hauptstr. 167
76829 Landau
Germany
tel.: +49 (0) 6341 9656 0
fax: +49 (0) 6341 9656 560
www.wattswater.de
---|---
Belgium-The Netherlands-Luxemburg
Watts Benelux
Beernemsteenweg 77A
8750 Wingene; Belgium
tel: +32 51658708
fax: +32 51658720
www.wattswater.nl| France
WATTS INDUSTRIES France
1590 avenue d’Orange CS 10101 SORGUES
84275 VEDENE cedex – (France)
tel.: +33 (0)4 90 33 28 28
fax: +33 (0)4 90 33 28 29/39
Italy
Watts Industries Italia S.r.l.
Via Brenno, 21
20853 Biassono (MB) – Italy
tel.: +39 039 4986.1
fax: +39 039 4986.222
www.wattswater.it| Spain
Watts Ind. Ibérica, S.A.
Pol. Ind. La Llana – Av. La Llana, 85
08191 Rubí (Barcelona)
Spain
tel.: +34 902 431 074
fax: +34 902 431 075
www.wattswater.es

WHOF2-IOM-IT-W-ML-05-23-Rev0
© 2023 Watts

References

• Home | Watts Europe
• Watts Industries Deutschland GmbH
• Watts Industries Español S.r.l. | Watts Water Technologies
• Home | Watts Europe
• WATTS INDUSTRIES FRANCE
• Watts Industries Italia S.r.l. | Watts Water Technologies.
• Engineering plumbing Watts

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>