MU1H-1234GE23 R0812
6
Honeywell GmbH
GB
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
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 which may
influence safety.
2. Functional description
BA type backflow preventers are divided into three
pressure zones. The pressure in zone 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 falls 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
4. Technical data
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
• Discharge connection
6. Options
7. Assembly
7.1 Installations Guidelines
• Install shutoff valves before and after backflow
preventer
• Install in horizontal pipework with the discharge
valve downwards
• Ensure good access
o Simplifies maintenance and inspection
• Backflow preventers of this type have an integral
strainer which protects the device from the ingress
of dirt
• Do not install in places where flooding can occur
• The installation environment should be protected
against frost and ventilated well
• Install discharge pipework which has adequate
capacity
7.2 Assembly instructions
1. Thoroughly flush pipework
2. Install backflow preventer
• Install in horizontal pipework with discharge connec-
tion directed downwards
• Note flow direction (indicated by arrow)
o Install without tension or bending stresses
• Provide a straight section of pipework of at least five
times the nominal valve size after the backflow
preventer
3. Attach drain pipe to discharge connection (plastic
pipe HT 50)
4. The appliance is ready for use
Medium
Water
Maximum inlet
pressure
10.0 bar
Minimum inlet pressure 1.5 bar
Installation posi-
tion
Horizontal with discharge valve
downwards
Max. operating
temperature
65°C
Discharge pipe
connection
DN50 for connection sizes
1
/
2
" - 1"
DN70 for connection sizes 1
1
/
4
" - 2"
Connection size
1
/
2
" - 2"
BA295-... A = Standard version with connections
Use and type of installation according to DIN
EN 1717