Honeywell BA298F, Инструкция по установке, Страница: 8 / 22

Honeywell GmbH 8 MU1H-1218GE23 R0307
GB
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
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)
8.3 Cleaning
1. Procedure see Maintenance
9. Disposal
The backflow preventer consists of:
• Stainless steel
• Red bronze
• Brass
Risk of injury - Check valves are under
spring tension!
• 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!
Observe the local requirements regarding
correct waste recycling/disposal!
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
Inlet check valve and/or discharge
valves are dirty Remove check valve or discharge valve and
clean it
Leaky inlet check valve Replace check valve
Discharge valve don’t close Deposits on valve seat Remove discharge valve, clean or replace it
Damaged ’o’ring Remove discharge valve and replace ’o’ring
Leaky discharge valve Remove discharge valve, clean or replace it
Discharge valve don’t open Blocked pressure control pipe Remove control pipe and clean it