Putting Into Service - Honeywell BA 299 I Einbauanleitung

4. Putting Into Service

The backflow preventer is put into service in the following
1 3 5 4 2 sequence:
1. Slowly open shutoff valves 1 and 2
During this process the discharge valve may open briefly
2. Vent backflow preventer by opening ball valves 3,4 and 5
Open each ball valve until water is emitted. It is important
to open all of the ball valves to ensure that all chambers
are fully vented of air.
3. The backflow preventer is now ready for use.
5. Inspection
DIN 1988 Part 8 specifies that every six months safety devices
such as type BA backflow preventers must be checked. This
inspection should also include ancillary equipment such as
strainers and shutoff valves. Only suitably competent persons
may carry out this work. The inspection must be documented,
complete with the date and signature on the control plate
affixed to the appliance. Local regulations must be observed.
IMPORTANT:
5.1 Testing the inlet non-return check valve
1. Connect the TK 298 test kit as illustrated to the relief
valves 3 and 5.
1 3 2
5 4
2. Open ball valves 3 and 4.
3. Close shutoff valves 1 and 2.
4. Slightly relieve the pressure in Zone 2 via the differential
pressure measuring equipment.
The differential pressure then rises until the inlet non-return
check valve starts to open.
The discharge valve must not discharge while this is
happening, otherwise it is not sealing. Possible causes for
this are dirt or mechanical defect ( section 6.1 -
replacement of the service replacement cartridge)
5. Close the relief valve on the differential pressure measuring
equipment.
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GB
No flow must occur whilst measuring,
otherwise false results may be obtained.
The differential pressure must now remain constant,
otherwise the inlet non-return check valve is not sealing.
Possible causes for this are dirt or a mechanical defect.
Section 6.1 - Replacement of the service replacement
cartridge.
6. Open shutoff valves 1 and 2.
7. Test discharge valve as described in section 5.2.
5.2 Testing the discharge valve
1. Connect the TK 298 test kit as illustrated to the relief
valves 3 and 5.
1 5 4
2
3
2. Open ball valves 3 and 4 and vent the pressure gauge.
3. Close the shutoff valves 1 and 2.
4. Slowly open the relief valve on the differential measuring
equipment until the differential pressure starts to fall. Then
maintain the position of the relief valve and note the opening
point of the discharge valve to be when one drop per minute
emits from the discharge valve.
The opening point of the discharge valve must be at 0.14
bar or above, otherwise th discharge valve is faulty. Possible
causes for this are dirt or mechanical defect.
Section 6.1 Replacement of the service replacement
cartridge.
5. Open shutoff valves 1 and 2.
6. Close ball valves 3 and 4.
7. Unscrew differential measuring equipment.
5.3 Testing the outlet non-return check valve
1. Connect the TK 298 test kit as illustrated to the relief
valve 4.
1 3 5 4 2
6
2. Open ball valve 4 and vent the pressure gauge.
3. Close shutoff valves 1 and 2.
4. Open ball valve 3 to discharge zone 2
5. Observe the pressure on gauge 6
The pressure must now remain constant, otherwise the
outlet non-return check valve is not sealing. Possible causes
for this are dirt or mechanical defect ( an initial drop of approx.
0.1 bar may be observed)
Section 6.1- Replacement of service replacement cartridge.
6. Open shutoff valves 1 and 2.
7. Close ball valves 4 and 5.
8. Remove differential pressure measuring equipment.
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