Honeywell GmbH
6
MU1H-1034GE23 R1109
GB
7. Maintenance
In accordance with DIN 1988, part 8, the following
measures must be taken:
7.1 Inspection
7.1.1 Pressure reducing valve
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
7.2 Maintenance
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
5. Slacken tension in compression spring
o Turn control handle to the left (-) until it does not
move any more
6. Unscrew spring bonnet
o Use double ring wrench ZR06K
7. Remove slip ring
8. Remove valve insert with a pair of pliers
9. Remove filter and clean
10.Check that sealing ring, edge of nozzle and slotted
ring are in good condition, and if necessary replace
the entire valve insert
11.Reassemble in reverse order
12.Adjust setting scale and set outlet pressure
7.3 Adjusting the setting scale
If the adjustment knob is removed, this setting is lost.
A new setting can be achieved using a pressure
gauge.
1. Close shutoff valve on inlet
2. Release pressure on outlet side (e.g. through water
tap)
3. Close shutoff valve on outlet
4. Fit manometer
5. Loosen slotted screw
o Do not remove slotted screw
6. Slowly open shutoff valve on inlet
7. Set desired outlet pressure (e.g. 4 bar)
8. Align scale (e.g. 4) in middle of viewing window
9. Retighten slotted screw
10.Slowly open shutoff valve on outlet
7.4 Cleaning
If nesseccary, the filter can be cleaned.
1. Close shutoff valve on inlet
2. Release pressure on outlet side (e.g. through water
tap)
3. Close shutoff valve on outlet
4. Slacken tension in compression spring
o Turn control handle to the left (-) until it does not
move any more
5. Unscrew spring bonnet
o Use double ring wrench ZR06K
6. Remove slip ring
7. Remove valve insert with a pair of pliers
8. Remove filter, clean and reinsert
9. Reassemble in reverse order
10.Adjust setting scale and set outlet pressure
8. Disposal
• Dezincification resistant brass housing
• High-quality synthetic material valve insert
• High-quality synthetic material spring bonnet with
adjustment knob and setting scale
• Spring steel adjustment spring
• Fibre-reinforced NBR diaphragm
• NBR seals
We recommend a planned maintenance
contract with an installation company
Interval: once a year
Frequency: every 1-3 years (depending on local
operating conditions)
To be carried out by an installation company
Press in diaphragm with finger before inserting
slip ring
Caution !
Do not use any cleaning agents containing
solvents and/or alcohol to clean the plastic
parts!
To be carried out by an installation company or
the operator.
Detergents must not be allowed to enter the
environment or the sewerage system!
Press in diaphragm with finger before inserting
slip ring
Observe the local requirements regarding
correct waste recycling/disposal!