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7. Important Safety Guidelines
Use appliance only in good condition, according to regulations
and codes of practice, with due regard to safety and in
accordance with installation instructions. Immediately rectify
any malfunctions which may influence safety.
Type BA 299 I backflow preventers are exclusively for use in
applications detailed in these installation instructions. Any other
use will not comply with requirements.
8. Fault Finding
Fault
Possible causes
Discharge valve opens
Large pressure fluctuations
without apparent reason
in downstream system
Inlet non-return check valve
or discharge valve are dirty-
Leaking inlet non-return check Fit service replacement cartridge
valve
Discharge valve does not close Deposits on valve seat
Leaking discharge valve
Insufficient flow
Inlet strainer blocked
22
GB
Solution
Fit pressure shock arrestor
after backflow preventer
Fit service replacement cartridge
Section 6.1
Section 6.1
Fit service replacement cartridge
Section 6.1
Fit service replacement cartridge
Section 6.1
Remove and clean sieve
9. Technical data
Total pressure drop:
max. 1.0 bar at design flow rate
Flow medium:
Water up to 65 °C
Operaing pressure:
max. 10.0 bar
Minimum inlet pressure:
1.0 bar
Ball valve connection:
G
1
/
"
4
Connection size
Weight
approx.(kg)
1
/
"
2.3
2
3
/
"
2.3
4
1''
4.0
1
1
/
''
4.0
4
1
1
/
'
7.0
2
2"
7.0
10. Accessories
Test kit:
TK 298
Electronic pressure testing kit with digital indicator in smart
aluminium case, ideal for inspection and maintenance of all
Honeywell Braukmann type BA ... backflow preventers
Strainers with internal thread
FY 30 with very fine double mesh and dezincification-resistant
connections:
brass housing. Mesh size approximately 0.18 mm
FY 30-B
FY 32 with double strainerand red bronze housing.
Mesh size approximately 0.25 mm
FY 32-C
Fine filter:
F 76 S with threaded connections
GB
Total length
Nominal flow rate
DVGW
/h at ∆p=1bar)
(mm)
(m
3
Test Number
236
5.0
in preparation
246
5.5
in preparation
310
12.5
in preparation
325
13.0
in preparation
377
30.0
in preparation
397
31.5
in preparation
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