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Honeywell GmbH
7
MU1H-1247GE23 R0614
GB
10. Troubleshooting
11. Spare Parts
12. Accessories
Disturbance
Cause
Remedy
Discharge valve opens without appa-
rent 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
Replace complete replacement unit
Discharge valve does not close
Deposits on valve seat
Replace complete replacement unit
Damaged ’o’ring
Replace complete replacement unit
Leaky discharge valve
Replace complete replacement unit
Flow is too low
Inlet strainer is blocked
Replace complete replacement unit
No. Description
Part No.
1
Replacement unit
AE295D
2
Strainer
S295D
3
Cartridge insert
0903733
4
Check valve insert
2110200
5
Set of blanking plugs
PS295STN
6
Shutoff facility
AS295D
7
Seal brackets (10 pieces)
PS295D
8
Retaining clip (10 pieces)
HK295D
2
5
1
7
6
4
3
8
7
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 diffe-
rential pressure display.
With case and accessories, ideal for inspection
and maintenance of backflow preventer type BA.
WS295STN Maintenance-set
Maintenance-set for BA295STN and BA295D
type backflow preventers for use with Test kit
TK295 resp. TKA295
TK295
TKA295
3x
1x
1x
WS295STN