GB
MU1H-1220GE23 R1020
6
1. Safety Guidelines
1.
Follow the installation instructions.
The factory-set position of the ball valves may
not be altered. Non-compliance with this
instruction will make any warranty claims null
and void.
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
applications detailed in these installation instruc-
tions. Any other use will not be considered to comply
with requirements and would invalidate the
warranty.
4.
Please take note that any assembly, commis-
sioning, servicing and adjustment work may only be
carried out by authorized persons.
5.
Immediately rectify any malfunctions whichmay
influence safety.
2.
Functional description
BA type backflow preventers are divided into three
pressurezones. Thepressure inzone
is higher than
in zone
, which in turn is higher than in zone
. A
discharge valve is connected to zone
which opens
at the latest when the differential pressure between
zones
and
drops to 0.14 bar. The water from
zone
discharges to atmosphere. In this way the
danger of back pressure or back syphonage into the
supply network is prevented. The pipework connection
is interrupted and the drinking water network is
protected.
3.
Application
Medium
Water
5.
Scope of delivery
The backflow preventer consists of:
•
Housing
•
Integral strainer, mesh size approx. 0.6 mm
•
Valve cartridge with integral check valve and
discharge valve
•
Outlet check valve
•
Three ball valves for the connection of a differential
pressure gauge
•
Connection fittings
•
Discharge connection
6.
Options
BA295-... A = Standard version with threaded
connections
1
/
2
",
3
/
4
", 1
1
/
2
" und 2"
BA295-... B = Standard version with threaded
connections
1" and 1
1
/
4
"
Connection size
7.
Assembly
7.1
Installations Guidelines
•
Install shutoff valves before and afterbackflow
preventer
•
Install in horizontal pipework with thedischarge
valve downwards
•
Ensure good access
o
Simplifies maintenance and inspection
•
If a fine filter is not installed in the drinking water
system, the installation of a filter with a mesh width
of 100µ m is recommended in front of the backflow
preventer.
•
In the case of fluctuating pre-pressure or an input
pressure over 10 bar, we recommend theinsertion
of a pressure regulator in front of the backflow
preventer.
•
Do not install in places where flooding can occur
Maximum inlet
pressure
10.0 bar
• The installation environment should beprotected
against frost and ventilated well
Minimum inlet pressure 1.5 bar
4. Technical data
Installation position Horizontal with discharge valve
downwards
•
Install discharge pipework which has adequate
capacity
Use and type of installation according to
DIN EN 1717
Max. operating
temperature
65°C
Discharge pipe
connection
