resideo FK74CS-1-2LFAA Filters and Filter Combinations
Safety Guidelines
- Follow the installation instructions
- Use the appliance
- according to its intended use
- in good condition
- with due regard to safety and risk of danger
- Note that the appliance is exclusively for use in the applications detailed in these installation instructions (see 2 Technical Data). Any other use will not be considered to comply with the requirements and would invalidate the warranty
- Please take note that any assembly, commissioning, servicing and adjustment work may only be carried out by authorized persons.
- Immediately rectify any malfunctions that may influence safety
Technical Data
F74CS/FN74CS
| Media | |
| Medium: | Drinking water |
| Connections/Sizes | |
| Connection sizes: | 1/2″ – 2″ (with rotatable connector piece) |
| Pressure values | |
| Operating pressure range: | 1.5 – 16 bar |
| Max. inlet pressure: | 16 bar
(up to 12 bar long-term*) |
| Operating temperatures | |
| Operating temperature range medium accord. to EN 1567: | 5 – 30 °C |
| Specifications | |
| Installation position: | Horizontal or vertical, with
filter bowl downwards |
* For maintaining the measuring accuracy of the manometer, a continuous maximum pressure load of 12 bar is permitted.
FK74CS/FKN74CS
| Media | |
| Medium: | Drinking water |
| Connections/Sizes | |
| Connection sizes: | 1/2″ – 2″ (with rotatable connector piece) |
| Pressure values | |
| Operating pressure range: | 1.5 – 16 bar |
| Max. inlet pressure: | 16 bar
(up to 12 bar long*-term) |
| Outlet pressure: | 1.5 – 6 bar |
| Operating temperatures | |
| Operating temperature range medium accord. to EN 1567: | 5 – 30 °C |
| Specifications | |
| Installation position: | Horizontal or vertical, with filter bowl downwards |
* For maintaining the measuring accuracy of the manometer, a continuous maximum pressure load of 12 bar is permitted.
Note:
The filter is constructed for drinking water installations. In case of a process water application the filter has to be proven individually.
Options
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Assembly
Installation Guidelines
WARNING!
The assembly of the drain connector is mandatory!
- The installation site has to be frost-proof and the protection of the device from chemicals, paints, detergents, solvents and their vapours and environmental influences must be guaranteed
- Install in horizontal or vertical pipework with filter bowl downwards
- This position ensures optimum filter efficiency
- These filters are armatures which need to be maintained regularly
- Ensure good access (consider EN1717 requirements)
- Pressure gauge can be read off easily
- Degree of contamination can be easily seen with clear filter bowl
- Simplifies maintenance and inspection
- It is recommended that a straight section of pipework at least five times the nominal valve size is provided after the filter (according to DIN EN 806-2)
- Fit immediately after water meter
- Related to the EN 806-2 it is recommended to install the filter immediately after the water meter
- In order to avoid flooding, it is recommended to arrange a permanent, professionally dimensioned wastewater connection
Assembly instructions
- Thoroughly flush pipework
- Install rotatable connector piece
- Note flow direction
- Install without tension or bending stresses CAUTION!
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.
- Install filter with sealing to rotatable connector
- Tighten the connecting nuts (7Nm)
- Screw in discharge connection
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 (consider EN1717 requirements).
To do this there are 3 options:
- Direct connection:
- Connector DN 50/70 as well as the necessary pipes and siphon (3 elbows 90°) in DN 70.
- Discharge into floor drain
- Drain into open container.
Filter size Reverse rinsing volume*
- 1/2″ and 3/4″ 12 litres
- 1″ and 1 1/4″ 15 litres
- 1 1/2″ and 2″ 18 litres
- *at 4 bar inlet pressure and 3 x 3 seconds reverse rinsing duration
Start-up
Setting outlet pressure (FK74CS/ FKN74CS only)
Set outlet pressure min. 1 bar under inlet pressure.
- Close shut-off valve on inlet
- Release pressure on outlet side (e.g. through water tap)
- Close shut-off valve on outlet
Connection sizes 1/2″ – 11/4″
Slacken tension in the compression spring
- Lift adjustment handle
- Turn adjustment handle counter-clockwise (-) until it does not move any more. Connection sizes 11/2″ – 2″
Slacken tension in compression spring
- Loosen slotted screw
Do not remove slotted screw - Turn adjustment handle counter clockwise (-) until it does not move any more
- Slowly open shut-off valve on inlet
- Turn adjuster knob until the manometer shows the desired value
- Turn clockwise = increase pressure on outlet side
- Turn counter-clockwise = reduce pressure on outlet side
Connection sizes 1/2″ – 11/4″
- Push the adjuster knob down and latch it in to activate the locking mechanism
Connection sizes 11/2″ – 2″ - Fasten the slotted screw to lock the mechanism . Slowly open shut-off valve on outlet
Reverse rinsing
During reverse rinsing, an inlet pressure of at least 1.5 bar is required.
The filter must be cleaned by reverse rinsing at the latest every 6 months! (According to EN 806-5.) Producer recommendation at least every 2 months!
To ensure convenient and regular adherence to the reverse rinsing interval, we recommend installing an automated reverse rinsing system.
(Connection sizes:
1/2″ – 11/4″RR74
11/2″ – 2″ RR11S
CAUTION!
Filtered water can also be tapped during 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.
- Open ball valve by turning the reverse rinsing handle to the stop
- Handle must be upright
- The patented reverse rinsing system starts
- 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.
Maintenance
In order to comply with EN 806-5, water fixtures must be inspected and serviced on an annual basis.
As all maintenance work must be carried out by an installation company, it is recommended that a servicing contract should be taken out.
In accordance with EN 806-5, the following measures must be taken:
Inspection
Pressure reducing valve (FK74CS/ FKN74CS only)
- Close shut-off valve on outlet
- 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 (See 6.2 Maintenance)
- Slowly open shut-off valve on outlet
Filter
- The filter must be cleaned by reverse rinsing at the latest every 6 months! (According to EN 806-5.) Producer recommendation at least every 2 months!
- Non-compliance can lead to the filter becoming blocked This results in a drop in pressure and decreased 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 the visual check of the ball valve. Exchange the KF11SB filter bowl in case of drop formation!
(Connection sizes:
1/2″ – 11/4″ KF74CS-1LFA
11/2″ – 2″ KF11S-11/2LFA
Maintenance
If necessary, the outside surface of the combination can be cleaned.
Use only cold, clear drinking water to clean the surfaces! Any other cleansers cause damage to the plastic components!
Pressure reducing valve (FK74CS
FKN74CS only)
- Close shut-off valve on inlet
- Release pressure on outlet side (e.g. through water tap)
- Close shut-off valve on outlet
CAUTION!
There is a spring in the spring bonnet. It may cause injuries if the spring is derailing.
Connection sizes 1/2″ – 11/4″
Slacken tension in the compression spring
- Lift adjustment handle
- Turn adjustment handle counter clockwise (-) until
it does not move any more - Loosen cover cap with a screw driver
- Pull out the adjustment handle
Connection sizes 11/2″ – 2″
Slacken tension in compression spring - Loosen slotted screw
Do not remove the slotted screw - Turn the adjustment handle counter-clockwise (-) until
it does not move any more
Do not turn in too far!
Unscrew spring bonnet
Use plastic wrench
(Connection sizes:
Replacement of the filter insert
- Close shut-off valve on inlet
- Release pressure on outlet side (e.g. through water tap)
- Close shut-off valve on outlet
- Unscrew filter bowl
Use plastic wrench
ZR74CS (1/2″ – 11/4″)
ZR10K-11/2 (11/2″ – 2″) - Remove old filter insert and replace by a new one!
- Put O-ring on filter bowl
- Screw in filter bowl hand-tight (without tools)
- Slowly open shut-off valve on inlet
- Slowly open shut-off valve on outlet
Disposal
Observe the local requirements regarding correct waste recycling/disposal!
Troubleshooting
F74CS/FN74CS
| Problem | Cause | Remedy |
| Too little or no water pressure | Shut-off valves upstream or downstream
from filter not fully open |
Open the shut-off valves fully |
| Filter mesh dirty | Reverse rinsing | |
| Not fitted in flow direction | Fit filter in flow direction |
FK74CS/FKN74CS
| Problem | Cause | Remedy |
| Water is escaping from the spring bonnet | Diaphragm in valve insert is faulty | Replace valve insert |
| Too little or no water pressure | Shut-off valves upstream or downstream
from filter not fully open |
Open the shut-off valves fully |
| Pressure reducing valve is not set to the desired outlet pressure | Set outlet pressure | |
| Filter mesh dirty | Reverse rinsing | |
| Not fitted in flow direction | Fit filter in flow direction (note direction of arrow on housing) | |
| The outlet pressure set does not remain constant | Filter mesh dirty | Reverse rinsing |
| Valve insert, sealing ring or edge of
nozzle is contaminated or worn |
Replace valve insert | |
| Rising pressure on outlet (e.g. in boiler) | Check check valve, safety group etc. |
Spare Parts
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Accessories
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Manufactured for and on behalf of
- Pittway Sàrl, Z.A., La Pièce 6,
- 1180 Rolle, Switzerland
- by its authorised
- representative Ademco 1 GmbH
Documents / Resources
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resideo FK74CS-1-2LFAA Filters and Filter Combinations [pdf] Installation Guide FK74CS-1-2LFAA, FX74CS-II-MU1H1186GE23R0425, FK74CS-1-2LFAA Filters and Filter Combinations, FK74CS-1-2LFAA, Filters and Filter Combinations, Filter Combinations, Combinations |