BA295STN - Gas detector HONEYWELL - Free user manual and instructions

USER MANUAL BA295STN HONEYWELL

Keep instructions for later use!

WS295STN Wartungsset

1. Follow the installation instructions.
2. Use the appliance
   according to its intended use
3. in good condition
   with due regard to safety and risk of danger.
4. 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.
5. Please take note that any assembly, commissioning, servicing and adjustment work may only be carried out by authorized persons.
6. Immediately rectify any malfunctions which may influence safety.

2. Functional description

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

3. Application

Backflow preventers of this type are suitable for the protection of drinking water systems against back pressure, back flow and back syphonage. They are used to protect the temporary water tapping of standpipes on events or construction sites. Fluids up to and including liquid category 4 to EN 1717 are protected.

Medium Water

Maximum inlet pressure 10.0 bar

Minimum inlet pressure 1.5 bar

Installation conditions for the safe operation of the appliance it's not necessary to fulfill any height dimensions

4. Technical data

Installation position Vertical with discharge valve downwards

Max. operating temperature 65 °C

Discharge pipe connection DN50

Nominal diameter 3/4"

5. Scope of delivery

The backflow preventer consists of:

Housing
- Integral strainer, mesh size approx. 0.4mm
- Valve cartridge with integral check valve and discharge valve
- Outlet check valve
- 3 test sockets
- Connection fittings
- Hose connection in 15^ off-axis angle to avoid bending of the hose
- Discharge connection

6. Options

BA295STN-3/4A = Standard version with threaded connections 1"

BA295STN-3/4AC12 =Housing chromium plated, connecting thread 3 / 4

7. Assembly

7.1 Installations Guidelines

• Installation downstream of outlet valve
• Backflow preventers of this type have an integral strainer which protects the device from the ingress of dirt. With highly polluted water a fine filter should be installed upstream to ensure the correct function of the device.
• The installation location should be protected against frost

7.2 Assembly instructions

1. Close shutoff valves
2. Screw backflow preventer in shutoff valve
3. Fit coupling and flexible tube
4. The appliance is ready for use
5. Open shutoff valves

8. Maintenance

We recommend a planned maintenance contract with an installation company

8.1 Inspection

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

8.1.1 Testing discharge valve

1. Remove coupling and flexible tube
2. Fit outlet shutoff valve with sealing and close it
3. Remove blanking plugs
4. Fit ball valve with sealings and close them
5. Open inlet shutoff valve
6. Install suitable test control unit with relief valves

Take note of the instructions of the test control unit

1. Open ball valve at zone ① and zone ②
2. Close inlet shutoff valve
3. Slowly open the vent valve at test control unit o Pressure in zone ① relieves
4. Maintain the position of the relief valve and note the differential pressure when one drop per minute emits from the discharge valve as opening point of the discharge valve

The opening pressure can be read off test control unit

Opening pressure under 0,14 bar Maintenance!

11.Close ball valve
12.Remove test control unit
13.Open outlet shutoff valve
14.Remove shutoff valve
15.Remove ball valves
16.Screw in blanking plugs

Quick test for the discharge valve:

• Lower the inlet pressure

o if the discharge valve opens (it drops), the function is o.k.

8.1.2 Testing outlet check valve

1. Remove coupling and flexible tube
2. Fit outlet shutoff valve with sealing and close it
3. Remove blanking plugs
4. Fit ball valve with sealings and close them
5. Open inlet shutoff valve
6. Install suitable test control unit with relief valves

Take note of the instructions of the test control unit

1. Open ball valve zone ①
2. Close inlet shutoff valve
3. Open ball valve zone ③ o Pressure in zone ③ stays constant, outlet check valve is ready for use

Pressure stays not constant Maintenance!

10.Close ball valve
11.Remove test control unit
12.Open outlet shutoff valve
13.Remove shutoff valve
14.Remove ball valves
15.Screw in blanking plugs

8.2 Maintenance

• Frequency: at least once a year (depending on local operating conditions)
• To be carried out by an installation company

8.2.1 Cartridge insert

1. Close shutoff valve
   o Pressure in backflow preventer relieves
2. Unscrew the plug
3. Exchange cartridge insert, lip seal and filter o push down the cartridge insert till it snaps in

• Don't disassemble cartridge insert to individual parts!

• Reassemble in reverse order

• Test function (see chapter inspection)

8.2.2 Check valve

1. Close shutoff valve
   o Pressure in backflow preventer relieves
2. Exchange check valve
3. Test function (see chapter inspection)

8.3 Cleaning

• To be carried out by an installation company
  To be carried out by the operator

If necessary, the cartridge insert and the strainer can be cleaned.

Do not use any cleaning agents containing solvents and/or alcohol to clean the plastic parts!

Detergents must not be allowed to enter the environment or the sewerage system!

1. Close shutoff valve
   o Pressure in backflow preventer relieves
2. Unscrew the plug
3. Remove strainer
4. Remove cartridge insert
5. Clean cartridge insert and strainer

• Don't disassemble cartridge insert to individual parts!

• Reinsert cartridge insert.

• Reassemble in reverse order
• Test function (see chapter inspection)

10. Troubleshooting

Disturbance	Cause	Remedy
Discharge valve opens without apparent reason	Pressure strokes in water supply system	Install a pressure reducing valve upstream the backflow preventer
	Fluctuating inlet pressure	Install a pressure reducing valve upstream the backflow preventer
	Cartridge insert is contaminated	Remove cartridge insert and exchange it
Discharge valve don't close	Deposits on valve seat	Remove cartridge insert and clean or exchange it
	Damaged 'o'ring	Remove cartridge insert and exchange it
	Leaky discharge valve	Remove cartridge insert and clean or exchange it
Flow is to low	Inlet strainer is blocked	Remove strainer and clean it

9. Disposal

• Dezincification resistant brass housing
  High-quality synthetic material valve cartridge
• High-quality synthetic material or red bronze check valves
  Sealing elements made of elastomer materials suitable for drinking water

Observe the local requirements regarding correct waste recycling/disposal!

11. Spare Parts

1 Cartridge insert 1/2" - 1" 0903733
2 Check valve insert 1 / 2'' - 1'' 2110200
3 Filter 1/2" - 1" S295STN
4 Set of blanking 1/2" - 1" 0903889 plugs-MS for Option A
5 Set of blanking 1 / 2^ - 1^ 0903886 plugs for Option AC12

12. Accessories

TK295 Test kit

Electronic pressure measuring device with digital indicator, battery-operated.

With case and accessories, ideal for inspection and maintenance of backflow preventer type BA.

TKA295 Test kit

Analogue pressure measuring device with differential pressure display.

With case and accessories, ideal for inspection and maintenance of backflow preventer type BA.

WS295STN Maintenance-set

Maintenance-set for BA295STN type backflow preventers for use with Test kit TK295 resp. TKA295

Dimensions de 3/4" raccordement

Automation and Control Solutions

Honeywell GmbH

Hardhofweg

D-74821 Mosbach

Phone: [phone]

Fax: [phone]

http://europe.hbc.honeywell.com

www.honeywell.com

Manufactured for and on behalf of the

Environmental and Combustion Controls Division of

16, Switzerland by its Authorised Representative

Honeywell GmbH

ENOH-1231GE23 R0809

Subject to change

1. Safety Guidelines 7
2. Functional description 7
3. Application 7
4. Technical data 7
5. Scope of delivery 7
6. Options 7
7. Assembly 7
8. Maintenance 8
9. Disposal 9
10. Troubleshooting 9
11. Replacement parts 10
12. Accessories 10

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