Maintenance; Disposal - Honeywell F74CS Einbauanleitung

9. Maintenance

We recommend a planned maintenance contract with
an installation company
In accordance with DIN 1988, part 8, the following measures
must be taken:
9.1. Inspection
9.1.1. Pressure reducing valve (FK74CS/FKN74CS 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
9.1.2. 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 the visual check of the ball valve.
Exchange the KF74CS filter bowl in case of drop forma-
tion!
9.2. Maintenance
9.2.1. Pressure reducing valve (FK74CS/FKN74CS only)
Frequency: every 1-3 years (depending on local opera-
ting conditions)
To be carried out by an installation company
1. Close shutoff valve on inlet
2. Close shutoff valve on outlet
3. Release pressure on outlet side (e.g. through water tap)
Caution !
There is a spring in the spring bonnet. It may cause inju-
ries if the spring is derailing.
• Make sure tension in compression spring is slak-
kened!
4. Slacken tension in compression spring
• Lift adjustment handle
• Turn adjustment handle counter clockwise (-) until it
does not move any more
5. Loosen cover cap with a screw driver
6. Pull out the adjustment handle
7. Unscrew spring bonnet
• Use plastic wrench ZR74CS
8. Remove spring and setting unit
Honeywell GmbH
GB
9. Remove slip ring
10. Remove valve insert with a pair of pliers
11. Unscrew filter bowl
• Use plastic wrench ZR74CS
12. Pull guide piece with O-ring out downwards
13. Remove slotted ring
14. Check that sealing ring, edge of nozzle and slotted ring
are in good condition, and if necessary replace the entire
valve insert
15. Reassemble in reverse order
Before inserting the cover hood, make sure the square
cut-out (hood) is aligned with the square drive (spindle).
Press in diaphragm with finger before inserting slip ring
Screw in spring bonnet (30Nm)
Put O-ring on filter bowl
Screw in filter bowl hand-tight (without tools)
16. Set outlet pressure
9.3. Cleaning
If necessary, the filter bowl and the filter can be cleaned.
Caution !
Use only cold, clear drinkink water to clean the
surfaces.
Frequency: every 6 month (depending on local opera-
ting conditions)
To be carried out by an installation company
1. Close shutoff valve on inlet
2. Close shutoff valve on outlet
3. Release pressure on outlet side (e.g. through water tap)
4. Unscrew filter bowl
• Use plastic wrench ZR74CS
5. Remove filter, clean and reinsert
6. Put O-ring on 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, spring bonnet and
guide piece
• Synthetic material valve insert, filter mesh carrier, adjust-
ment handle, reverse rinsing handle and covers
• Dezincification resistant brass connector piece (F74CS
and FK74CS only)
• Stainless steel fine filter
• Shock-resistant, clear transparent synthetic material filter
bowl
• Fibre-reinforced NBR diaphragm
• EPDM sealing washers
Observe the local requirements regarding correct
waste recycling/disposal!
11 MU1H-1156GE23 R1111