Check Valve - Honeywell BA298F Notice D'installation

8.2.2 Check valve

1. Close shut off valve on inlet
2. Release pressure on outlet side (e.g. through water
tap)
1. Close shut off valve on outlet
2. Open the fixing clip
3. Remove cover
Risk of injury - Check valves are under
spring tension!
4. Remove the check valves
o first unscrew the outlet and then the inlet check
valve. An assembly tool is available as an acces-
sory.
5. Fill with water and check for leakage
o Leaking check valves must be replaced. They
cannot be repaired
6. Reassemble in reverse order
• Well lubricate check valve 'O' ring with grease
• Do not damage 'O' ring during assembly
• The check valve tightening torque is 100 to 120 Nm
7. Test function (see chapter inspection)
10. Troubleshooting
Disturbance
Discharge valve opens without
apparent reason
Discharge valve don't close
Discharge valve don't open
Honeywell GmbH
GB
Cause
Pressure strokes in water supply
system
Fluctuating inlet pressure
Inlet check valve and/or discharge
valves are dirty
Leaky inlet check valve
Deposits on valve seat
Damaged 'o'ring
Leaky discharge valve
Blocked pressure control pipe
8
8.3 Cleaning
• To be carried out by an installation company
• To be carried out by the operator
Do not use any cleaning agents containing
solvents or alcohol to clean the plastic parts!
Detergents must not be allowed to enter the
environment or the sewerage system!
1. Procedure see Maintenance
9. Disposal
The backflow preventer consists of:
• Stainless steel
• Red bronze
• Brass
Observe the local requirements regarding
correct waste recycling/disposal!
Remedy
Install a pressure reducing valve upstream
the backflow preventer
Install a pressure reducing valve upstream
the backflow preventer
Remove check valve or discharge valve and
clean it
Replace check valve
Remove discharge valve, clean or replace it
Remove discharge valve and replace 'o'ring
Remove discharge valve, clean or replace it
Remove control pipe and clean it
MU1H-1218GE23 R0307