Maintenance - Honeywell FN74C 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 (FK74C/FKN74C)
Interval: once a year
1. Close shut off valve on outlet
2. Check back pressure using a pressure meter when there
is zero through-flow
o 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 to do a visual check of the ball valve.
Replace if it is dripping!
9.2 Maintenance
9.2.1 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
o 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 slak-
kened!
5. Slacken tension in compression spring
o Turn control handle to the left (-) until it does not move
any more
o Do not turn in too far!
6. Unscrew spring bonnet
o Use double ring wrench ZR10K
Honeywell GmbH
GB
7. Remove slip ring
8. Remove valve insert with a pair of pliers
9. Unscrew filter cup and guide piece
o 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 entire valve
insert
12.Reassemble in reverse order
Press in diaphragm with finger before inserting slip ring
Screw in filter bowl hand-tight (without tools)
13.Set outlet pressure
9.3 Cleaning
Caution !
Do not use any cleaning agents containing solvents
and/or alcohol to clean the plastic parts!
If necessary, the filter bowl and the filter can be cleaned.
Frequency: every 6 month (depending on local opera-
ting conditions)
To be carried out by an installation company
Detergents must not be allowed to enter the environ-
ment 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
o 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 insert
and filter mesh carrier (FK74C and FKN74C only)
• Red bronze connector piece (FK74C and F74C only)
• Stainless steel fine filter
• Shock-resistant, clear transparent synthetic material filter
bowl
• NBR seals
Observe the local requirements regarding correct
waste recycling/disposal!
8 MU1H-1149GE23 R0710