MU1H-1005GE23 R1112
4
Honeywell GmbH
GB
1. Safety Guidelines
1. Follow the installation instructions.
2. Use the appliance
• according to its intended use
• in good condition
• with due regard to safety and risk of danger.
3. Note that the appliance is exclusively for use in the appli-
cations detailed in these installation instructions. Any
other use will not be considered to comply with require-
ments and would invalidate the warranty.
4. Please take note that any assembly, commissioning,
servicing and adjustment work may only be carried out by
authorized persons.
5. Immediately rectify any malfunctions which may influence
safety.
2. Description of function
Spring loaded pressure reducing valves operate by means of
a force equalising system. The force of a diaphragm operates
against the force of an adjustment spring. If the outlet pres-
sure and therefore diaphragm force fall because water is
drawn, the then greater force of the spring causes the valve
to open. The outlet pressure then increases until the forces
between the diaphragm and the spring are equal again.
The inlet pressure has no influence in either opening or
closing of the valve. Because of this, inlet pressure fluctuation
does not influence the outlet pressure, thus providing inlet
pressure balancing.
3. Application
4. Technical data
5. Scope of delivery
The pressure reducing valve comprises:
• Housing with PN25 flanges to DIN 86021
• Valve insert complete with diaphragm and valve seat
• Spring bonnet with adjustment knob
• Filter with 0.5 mm mesh
• Filter bowl
• Adjustment spring
• Pressure gauge not included (see accessories)
6. Options
7. Assembly
7.1. Installations Guidelines
• Install in horizontal pipework with filter bowl downwards.
• Install shutoff valves
• The installation location should be protected against frost
and be easily accessible
- Pressure gauge can be read off easily
- Simplified maintenance and cleaning
• Install downstream of the strainer
- This position ensures optimum protection for the pres-
sure reducing valve against dirt
• Provide a straight section of pipework of at least five times
the nominal valve size after the pressure reducing valve (in
accordance with DIN EN806 part 2)
7.2. Assembly instructions
1. Thoroughly flush pipework
2. Install pressure reducing valve
• Note flow direction
• Install without tension or bending stresses
3. Seal pressure gauge
8. Start-up
8.1. Setting outlet pressure
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
5. Slacken tension in compression spring
6. Slowly open shutoff valve on inlet
7. Rotate adjustment screw, until the pressure gauge shows
the desired value
8. Retighten hexagon nut
9. Slowly open shutoff valve on outlet
9. Maintenance
In accordance with DIN 1988, part 8, the following measures
must be taken:
9.1. Inspection
9.1.1. Pressure reducing valve
1. Close shutoff valve on outlet
2. Check outlet pressure using a pressure meter when there
is zero through-flow
Medium
Water, compressed air* and nitrogen* in
consideration of valid standards (e.g. DIN
EN 12502)
Inlet pressure max. 25 bar
Outlet pressure 1.5 - 12 bar
Set during manufacture at 4.0 bar outlet pressure
Operating temperature max. 70°C
Nominal pressure
PN25
Minimum pressure drop 1 bar
Nominal size
DN15 - DN40
° As part of an installation being approved according to PED require-
ments, this product must also be certified.
D16-... A = With PN 25 flanged connections to DIN 86021
Special Versions available on request
Connection size
Set outlet pressure min. 1 bar under inlet pressure.
We recommend a planned maintenance contract with
an installation company
Interval: once a year