Resideo Ba295s Class 4 Backflow Preventer Rpz Valve Installation Guide

Braukmann BA295S

Keep instructions for later use!
Backflow Preventer

Safety Guidelines

1. Follow the installation instructions.
   The factory-set position of the ball valves may not be altered. Non-compliance with this instruction will make any warranty claims null and void.
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 applications detailed in these installation instructions. Any other use will not be considered to comply with requirements 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. Immediately rectify any malfunctions which may influence safety.

Description of function

BA-type backflow preventers are divided into three pressure zones. The pressure in the zone 1 is higher than in the zone, which in turn is higher than in the zone 3. A discharge valve is connected to a zone 2 which opens at the latest when the differential pressure between zones 1 and 2 drops to 0.14 bar. The water from the zone discharges to the atmosphere, both check valves close and therefore separate zone 2 from zone 1 and 3. In this way, the danger of backpressure or back-siphonage into the supply network is prevented. The pipework connection is interrupted and the drinking water network is protected.

Application

Technical data

Installation position Horizontal with discharge valve downwards

Scope of delivery

The backflow preventer consists of:

• Housing
• Integrated strainer, mesh size approx. 0.2 mm
• Valve cartridge with integrated check valve and discharge valve
• Outlet check valve
• Three ball valves for the connection of a differential pressure gauge
• Connection fittings
• Discharge connection

Options

BA295S-… A = Standard version acc. EN12729 with threaded connections 1/2″ – 2″
BA295S-1B = Special version with threaded connections 1″
BA295S-… AGB = Standard version acc. EN12729, all materials acc. WRAS, with threaded connections 1/2″ – 2″

Assembly

Installations Guidelines

• Install shutoff valves before and after the backflow preventer
• Install in horizontal pipework with thedischarge valve downwards
• Ensure good access
  • Simplifies maintenance and inspection
• If a fine filter is not installed in the drinking water system, the installation of a filter with a mesh width of 100µ m is recommended in front of the backflow preventer.
• In the case of fluctuating pre-pressure or an input pressure over 10 bar, we recommend the insertion of a pressure regulator in front of the backflow preventer.
• Do not install in places where flooding can occur
• The installation environment should be protected against frost and ventilated well. Do not install in polluted atmosphere, for example, toxic vapor, aerosol, gas or dust
• Install discharge pipework that has adequate capacity
  Use and type of installation according to EN 1717

Assembly instructions

1. Thoroughly flush pipework
2. Install backflow preventer
   • Install in horizontal pipework with discharge connection directed downwards
   • Note flow direction (indicated by arrow)
   • Install without tension or bending stresses
   • Provide a straight section of pipework of at least five times the nominal valve size after the backflow preventer
3. Attach drain pipe to discharge connection (plastic pipe HT 50, HT 70)
4. The appliance is ready for use

Maintenance

We recommend a planned maintenance contract with an installation company

Maintenance of the backflow preventer must be carried out by authorized personnel!

Inspection – acc. EN806-5

• Frequency: every 6 months (depending on local operating conditions)
• To be carried out by an installation company
• Inspection with a test control unit and maintenance set (see accessories)

1. Testing discharge valve
   Test with a test kit
   1. Procedure according to local requirements
   Quick test for the discharge valve:
   • Lower the inlet pressure
   – if the discharge valve opens (it drops), the function is o.k.
2. Testing outlet check valve Test with the test kit
   1. Procedure according to local requirements

Maintenance

We recommend a planned maintenance contract with an installation company
In accordance with EN 806-5 a regular maintenance must be taken.
Frequency: every 1-3 years (depending on local operating conditions)
To be carried out by an installation company

1. Cartridge insert
   1. Close shutoff valve on the inlet
   2. Release pressure on the outlet side (e.g. through water tap)
   3. Close shutoff valve on the outlet
   4. Remove cover
   5. Replace cartridge insert and lip seal
   • Don’t disassemble cartridge insert to individual parts!
   6. Reassemble in reverse order · push down the cartridge insert till it snaps in
   7. Test function (see chapter inspection)
2. Check valve
   1. Close shutoff valve on the inlet
   2. Release pressure on the outlet side (e.g. through water tap)
   3. Close shutoff valve on the outlet
   Caution DN50 is under spring tension.
   The unsnapping of the lid can cause physical injuries.
   4. Remove cover
   5. Exchange check valve
   6. Reassemble in reverse order
   7. Test function (see chapter inspection)

Cleaning

• To be carried out by an installation company
• To be carried out by the operator
  If necessary, the cartridge insert can be cleaned.
  Do not use any cleaners that contain solvents and/or alcohol for cleaning the plastic parts, because this can cause damage to the plastic components – water damage could result.
  Detergents must not be allowed to enter the environment or the sewerage system!

1. A close shutoff valve on the inlet
2. Release pressure on the outlet side (e.g. through water tap)
3. A close shutoff valve on the outlet
4. Remove cover
5. Clean or replace cartridge insert and lip seal
   • Don’t disassemble cartridge insert to individual parts!
6. Reassemble in reverse order · push down the cartridge insert till it snaps in
7. Test function (see chapter inspection)

Disposal

• DZR brass housing
• Valve cartridge in high-grade synthetic material
• An outlet check valve in high-grade synthetic material for connection size 1/2″ – 1 1/2″, an outlet check valve in dezincification resistant brass for connection size 2″
• Brass ball valves
• Sealing elements made of elastomer materials suitable for drinking water
• Discharge connection in high-grade synthetic material Observes the local requirements regarding correct waste recycling/disposal!

Troubleshooting

Spare Parts

Accessories

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