resideo FK74CS-1-2LFAA Reverse Rinsing Filter with Pressure Regulation Instruction Manual

resideo FK74CS-1-2LFAA Reverse Rinsing Filter with Pressure Regulation

Specifications:

• Medium: Water
• Inlet Pressure: Max. 16.0 bar
• Outlet Pressure: 1.5 – 6.0 bar
• Installation Position: Vertical or Horizontal with filter bowl downwards
• Operating Pressure: Min. 1.5 bar

Product Usage Instructions

1. Scope of Delivery:

The product includes all necessary components for installation and operation.

2. Assembly:

2.1 Installation Guidelines:

Ensure proper installation following the guidelines provided in the manual.

2.2 Assembly Instructions:

1. Thoroughly flush pipework before installation.
2. Install the rotatable connector piece according to the provided instructions.
3. When connecting to an existing flange, ensure the correct flow direction.
4. Seal the filter with the rotatable connector and pressure gauge.

3. Discharge of Reverse Rinsing Water:

Ensure proper routing of reverse rinsing water to prevent backflow using one of the provided options.

4. Maintenance:

Regular inspection and maintenance are required to ensure optimal performance of the filter system.

Frequently Asked Questions

• Q: How often should the pressure be checked?
  • A: The pressure should be checked regularly, at least every 2 months, to ensure it remains within the specified range.
• Q: What should I do if the outlet pressure is not constant?
  • A: Adjust the outlet pressure as per the provided instructions to ensure stability in operation.

Keep instructions for later use

Safety Guidelines

1. Follow the installation instructions.
2. Use the appliance
   • according to its intended use
   • in good condition
   • with due regard to safety and risk of danger.
3. Note that the appliance is exclusively for use in the applications detailed in these installation instructions. Any other use will not be considered to comply with requirements and would invalidate the warranty.
4. Please take note that any assembly, commissioning, servicing and adjustment work may only be carried out by authorized persons.
5. Immediately rectify any malfunctions which may influence safety.

Description of function

The filter combination combines reverse rinsing filter and a pressure-reducing valve in one appliance. The filter insert comprises an upper part and a lower combination section. When in the „filtering“ position, the small upper filter is closed so that the water can only pass through the main filter from outside to inside. When the ball valve is opened for reverse rinsing, the filter is pushed downwards until the water supply to the outer side of the main filter is stopped. Simultaneously, the water flow is opened to the upper part of the filter. During reverse rinsing, the screen is flushed by flow from the outside; the rotating impeller and the main filler are flushed by flow from the inside. By this means, the filter is fully cleaned over its whole surface area at the full inlet pres-sure. The filter automatically switches over to the operating position when the ball valve is closed again.The integral pressure-reducing valve functions on a balanced force principle whereby the force exerted by a diaphragm is balanced against the force of an adjustment spring. The inlet pressure has no influence on opening or closing of the valve. Inlet pressure fluctuation does not therefore affect the outlet pressure.

Application

• Medium Water
• Inlet pressure Maximum 16.0 bar
• Outlet pressure 1.5 – 6.0 bar

The filter is constructed for drinking water installations. In case of a process water application, the filter has to be proven individually.

Technical data

• Installation position Vertical or horizontal, with filter bowl downwards
• Operating pressure Minimum 1.5 bar
• Operating temperature Maximum 30 °C
• Connection size ¾″, 1″, 1¼″

Scope of delivery

The filter combinations FK74C and FKN74C comprises:

• Housing with pressure gauge
• Spring bonnet with adjustment knob
• Valve insert complete with diaphragm and valve seat
• Rotatable connector piece (FK74C only)
• Threaded union connectors (FK74C only)
• Fine filter in clear filter bowl
• Ball valve with drain connection
• Double ring wrench

The fine filters F74C and FN74C comprises:

• Housing with pressure gauge
• Threaded connections
• Rotatable connector piece (F74C only)
• Fine filter in clear filter bowl
• Ball valve with drain connection
• Double wring wrench

Options

• FKN74C-1AN = Filter mesh size 100 μm; rotatable connector piece DA74C has to be ordered separately -see accessories
• FN74C-1AN = Filter mesh size 100 μm; rotatable connector piece DA74C has to be ordered separately – see accessories

Assembly

Installations Guidelines

• Install in horizontal or vertical pipework with filter bowl downwards
• The pressure gauge can be read off easily
• Degree of contamination can be seen with clear filter bowl
• Simplifies maintenance and inspection
• The installation location should be protected against frost
• Fit immediately after water meter
• Corresponds to DIN 1988, Part 2
• It is recommended that a straight section of pipework at least five times the nominal valve size is provided after the filter combination (according to DIN EN 806, part 2)

Assembly instructions

1. Thoroughly flush pipework
2. Install rotatable connector piece
   • Note flow direction
   • Install without tension or bending stresses When connecting to an existing flange of another make ensure that the inlet flow is through the outer ring of holes. If this is not so, the whole connection piece must be installed the other way round, even if the arrow does not then indicate the actual flow direction. If the flange is threaded, the threaded holes must be drilled out to a diameter of 6.3 mm.
3. Install filter with sealing to rotatable connector
4. Seal in pressure gauge

Discharge of reverse rinsing water

The reverse rinsing water must be routed to the drain channel in such a way that no backwater can occur.

To do this there are 3 options:

1. Direct connection:
   • Connector DN 50/70 as well as the necessary pipes and siphon (3 elbows 90°) in DN 70.
2. Discharge into floor drain
3. Drain into open container.

Filter size Reverse rinsing volume*

• ¾″ 12 Liter
• 1″ und 1 ¼″ 15 Liter
• *at 4 bar inlet pressure and 3 x 3 seconds reverse rinsing duration

Start-up

Setting outlet pressure (FKN74C only)

Set outlet pressure min. 1 bar under inlet pressure.

1. Close shutoff valve on inlet
2. Release pressure on outlet side (e.g. through water tap)
3. Close the shutoff valve on the outlet
4. Loosen slotted screw
   • Do not remove the slotted screw
5. Slacken tension in compression spring
   • Turn the adjustment handle counterclockwise (-) until it does not move any more
6. Slowly open the shutoff valve on inlet
7. Turn the adjuster knob until the manometer shows the desired value.
8. Retighten slotted screw
9. Slowly open the shutoff valve on the outlet

Reverse rinsing

During reverse rinsing, an inlet pressure of at least 1.5 bar is required. The reverse rinsing interval depends on the degree of dirt in the water. At the latest every 2 months, reverse rinsing should be carried out according to DIN 1988, Part 8. To ensure convenient and regular adherence to the reverse rinsing interval, we recommend installing an automated reverse rinsing system Z74S / Z74A (see accessories). Filtered water can also be tapped during reverse rinsing.

Manual reverse rinsing

If reverse rinsing water is not to be discharged via a direct connection, a collecting container must be positioned beneath before reverse rinsing.

1. Open ball valve by turning the reverse rinsing button to the stop point
   • Select bar must be upright
   • The patented reverse rinsing system starts
2. Close ball valve again after approx. 3 seconds. Repeat procedure three times
   • If the filter is extremely dirty, the procedure may have to be repeated additional times With aid of the memory ring, the next deadline for manual reverse rinsing can be booked.

Automatic reverse rinsing

The automated reverse rinsing system Z74A resp. Z74S is available as an accessory. The automated system reliably takes over reverse rinsing of the filter at intervals which can be set between 4minutes and 3months. (Z74A) resp. at a fixed intervall of 45 days (Z74S).

Maintenance

We recommend a planned maintenance contract with an installation company In accordance with DIN 1988, part 8, the following measures must be taken:

Inspection

Pressure-reducing valve (FKN74C only)

Interval: once a year

1. Close shutoff valve on outlet
2. Check outlet pressure using a pressure meter when there is zero through-flow
   • If the pressure is increasing slowly, the valve may be dirty or defective. In this instance, carry out servicing and cleaning
3. Slowly open shutoff valve on outlet

Filter

Interval: every 2 months

• The filter must be cleaned by reverse rinsing regularly, at the latest every 2 months
• Non-compliance can lead to the filter becoming blocked This results in a drop in pressure and decreasing water flow
• The filter meshes are made of stainless steel. A red coating as a consequence of rust from the pipelines has no influence on function or the way the filter works Do not forget to do a visual check of the ball valve. Replace if it is dripping!

Maintenance

Pressure reducing valve

Frequency: every 1-3 years (depending on local operating conditions)

To be carried out by an installation company

1. Close shutoff valve on inlet

2. Release pressure on outlet side (e.g. through water tap)

3. Close shutoff valve on outlet

4. Loosen slotted screw

   • Do not remove slotted screw
     Caution !
     There is a spring in the spring bonnet. It may cause injuries if the spring is derailing.
     Make sure tension in compression spring is slakkened!

5. Slacken tension in compression spring

   • Turn adjustment handle counter clockwise (-) until it does not move any more
   • Do not turn in too far!

6. Unscrew spring bonnet

   • Use double ring wrench ZR10K

7. Remove slip ring

8. Remove valve insert with a pair of pliers

9. Unscrew filter cup and guide piece

   • Use double ring wrench ZR10K

10. Remove slotted ring

11. Check that sealing ring, edge of nozzle and slotted ring are in good condition, and if necessary replace the entirevalve insert

12. Reassemble in reverse order Press in diaphragm with finger before inserting slip ringScrew in filter bowl hand-tight (without tools)

13. Set outlet pressure

Cleaning

Caution !

Do not use any cleansers that contain solvents and/ or alcohol for cleaning the plastic parts, because this can cause damage to the plastic components – water damage could result. If necessary, the filter bowl and the filter can be cleaned. Frequency: every 6 month (depending on local operating conditions) To be carried out by an installation company

Detergents must not be allowed to enter the environment or the sewerage system!

1. Close shutoff valve on inlet
2. Release pressure on outlet side (e.g. through water tap)
3. Close shutoff valve on outlet
4. Unscrew filter bowl
   • Use double ring wrench ZR10K
5. Remove filter, clean and reinsert
6. Place O-ring onto filter bowl
7. Screw in filter bowl hand-tight (without tools)
8. Slowly open shutoff valve on inlet
9. Slowly open shutoff valve on outlet
10. Disposal
    • High quality synthetic material housing
    • Brass threaded connections
    • High quality synthetic material spring bonnet, valve inser and filter mesh carrier (FKN74C only)
    • Stainless steel fine filter
    • Shock-resistant, clear transparent synthetic material filter bowl
    • NBR seals

Observe the local requirements regarding correct waste recycling/disposal!

Troubleshooting

FKN74C

Spare Parts

Accessories

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