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1. Safety Guidelines
1. Follow the installation instructions.
2. Use the appliance
• according to its intended use
• in good condition
• with due regard to safety and risk of danger.
3. Note that the appliance is exclusively for use in the appli-
cations detailed in these installation instructions. Any
other use will not be considered to comply with require-
ments and would invalidate the warranty.
4. Please take note that any assembly, commissioning,
servicing and adjustment work may only be carried out by
authorized persons.
5. Immediately rectify any malfunctions which may influence
safety.
2. Description of function
The pressure-test kit is used for inspection and maintenance
by backflow preventer type BA.
The pressure-test kit consists of a differential pressure gauge,
needle valves, bleed valves and different hoses.
The differential pressure gauge compares the differential
pressure between two chambers in the backflow preventer.
The transfused pressures between the pressure chambers
are adjusted and controlled by the needle valves. During the
measurement procedure the needle valves keep the pressure
between the two chambers constant.
The integrated filters protect the differential pressure gauge
against ingress dirt particles.
3. Application
In combination with the following backflow preventers:
BA195, BA295S, BA295I, BA295STN, BA295STN-C,
BA298F, BA298IF
The pressure-test kit can only be used for the inspection and
maintenance of the backflow preventer specified above.
The pressure-test kit may only be used in the entire one.
It is not permitted to use individual components (e.g. only
differential pressure gauge) for inspection and maintenance.
4. Technical data
Ambient temperature
Operating temperature
Operating pressure
Display range differential pressure (Δp)
Differential pressure accuracy
Weight complete
GB
5. Scope of delivery
The pressure-test kit consists of:
Differential pressure gauge
Manometer, sidewise
Hoses with quick release fastener, coloured
Bleed tube, clear
Needle valves, coloured
Bleed valves, coloured
Adapter fittings
Carrying case
6. Assembly
6.1. Installations Guidelines
It is necessary during operation to follow the operation
instructions, to comply with local requirements and to follow
the codes of good practice.
Note flow direction of the backflow preventer (indicated by
arrow).
All needle valves and bleed valves on the pressure-test kit
must be closed.
1. Connect clear ventilation hose to the bleed valve (red and
blue) on the top of the housing.
7. Inspection backflow preventer
In accordance with DIN EN 1717 a regular maintenance must
be taken.
7.1. Testing discharge valve
The backflow preventer change to shutoff position if the diffe-
rential pressure between middle- and inlet chamber falls
under 0.14 bar.
1. Close shutoff valve B.
0-40°C
2. Open shutoff valve A.
max. 65°C
• Backflow preventer is pressurised.
max. 14,0 bar
• Water flows through the check valve.
0-1,0 bar
3. Install appropriate adapters in all ball valves.
+/- 0,014 bar
4. Connect hose (red) between ball valve P1 and needle
1,6 kg
valve (red) on the back of the housing.
5. Connect hose (blue) between ball valve P2 and needle
valve (blue) on the back of the housing.
6. Close all needle and bleed valves.
7. Open ball valves P1 and P2.
• If possible sewage the bleed tube to a discharge or use
5
Maintenance of backflow preventer must be carried
out by authorized personnel!
Frequency: at least every six month (depending on
local operating conditions
Consider the operating instructions of the backflow
preventer!
a vent surge tank.
1 pc.
1 pc.
3 pc.
1 pc.
3 pc.
2 pc.
3 pc. each
1 pc.
MU1H-1227GE23 R0321
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