Pressure Reducing Valve; Troubleshooting - Honeywell D15SN Instrucciones De Montaje

9. Maintenance
We recommend a planned maintenance contract with
an installation company
In accordance with DIN EN806-5, the following measures
must be taken:
9.1. Inspection

9.1.1. Pressure Reducing Valve

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
9.2. Maintenance
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 hexagon nut on spring bonnet
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!

11. Troubleshooting

Problem
Water is escaping from the spring
bonnet
Too little or no water pressure
MU1H-1057GE23 R0715
GB
5. Slacken tension in compression spring
6. Unscrew spring bonnet
7. Check the cartridge insert for fault-free condition and
8. Reassemble in reverse order
10. Disposal
• Housing made of ductile cast iron
• Spring bonnet made of ductile cast iron
• Cartridge insert made completely of low-lead (<2.2 % acc.
• Spring steel adjustment spring
• Diaphragm and seals made of EPDM
• Groove ring and sealing disc made of high-quality PU
• Stainless steel screws and nuts
Cause
Diaphragm is faulty
Spring bonnet not screwed flush
O-ring forgotten in the diaphragm piston
during assembly
Shutoff valves up- or downstream of the
pressure reducing valve are not fully open
Pressure reducing valve is not set to the
desired outlet pressure
Pressure reducing valve is not fitted in flow
direction
8
• Turn control adjustment screw to the left (-) until it does
not move any more
replace insert or sealing parts if necessary.
(EN-GJS-400-15 EN1563), coated with PA (polyamide)
(EN-GJS-400-15 EN1563), coated with PA (polyamide)
to DIN 50930 part 6) brass with stainless steel valve
spindle
Observe the local requirements regarding correct waste
recycling/disposal!
Remedy
Replace diaphragm
Retighten the screws
Insert O-ring
Open the shutoff valves fully
Set outlet pressure
Fit pressure reducing valve in flow direction
(note direction of arrow on housing)
Honeywell GmbH