resideo D15P Pressure Reducing Valve Instruction Manual

: June 6, 2024
: resideo

resideo D15P Pressure Reducing Valve Instruction Manual

resideo D15P Pressure Reducing Valve

D15P

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1. Safety Guidelines

Follow the installation instructions.
Use the appliance
• according to its intended use
• in good condition
• with due regard to safety and risk of danger.
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.
Please take note that any assembly, commissioning, servicing and adjustment work may only be carried out by authorized persons.
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

Medium: Water, compressed air, oil free
compressed air and nitrogen* in considera- tion of valid standards (e.g. DIN EN 12502)
Inlet pressure: max. 16 bar
Outlet pressure: 1.5 – 8 bar – DN50, DN125, DN150
1.5 – 6 bar – DN200

4. Technical data

Operating temperature: max. 70°C
Nominal pressure: PN16
Minimum pressure drop: 1,0 bar
Diaphragm pressure loading max. 9,0 bar
Nominal size: DN50, DN125, DN150, DN200

° As part of an installation being approved according to PED requirements, this product must also be certified.

5. Scope of delivery

The pressure reducing valve comprises:

Housing with PN16 flanges per ISO7005-2, EN1092-2
Spring bonnet with adjustment screw
Adjustment spring
Valve system complete with diaphragm
Pressure gauge

6. Options

FIG 1 Options

7. Assembly

7.1. Installations Guidelines

Install in horizontal pipework with spring bonnet directed upwards
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 filter or 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

Thoroughly flush pipework
Install pressure reducing valve
• Note flow direction
• Install without tension or bending stresses
Seal pressure gauge

8. Start-up

8.1. Setting outlet pressure

Set outlet pressure min. 1 bar under inlet pressure.

FIG 10 Setting outlet pressure

Close shutoff valve on inlet
Release pressure on outlet side (e.g. through water tap)
Close shutoff valve on outlet
Loosen hexagon nut
Slowly open shutoff valve on inlet
Rotate adjustment screw, until the pressure gauge shows the desired value
Retighten hexagon nut
Slowly open shutoff valve on outlet

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

Interval: once a year

Close shutoff valve on outlet
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
Slowly open shutoff valve on outlet

9.2. Maintenance

FIG 11 Maintenance

FIG 12 Maintenance

Frequency: every 1-3 years (depending on local operating conditions)
To be carried out by an installation company

Close shutoff valve on inlet
Release pressure on outlet side (e.g. through water tap)
Close shutoff valve on outlet
Loosen hexagon nut 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!
Slacken tension in compression spring
• Turn control adjustment screw to the left (-) until it does not move any more
Unscrew spring bonnet
Check that diaphragm, seals, guide and seating bush are in good condition, and if necessary replace them
Reassemble in reverse order