Honeywell BA300 Installation Instructions Manual page 6

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
BA type backflow preventers are divided into three pressure
zones. The pressure in zone
which in turn is higher than in zone
connected to zone which opens at the latest when the
differential pressure between zones
bar. The water from zone
check valves close and therefore separate zone
and . In this way the danger of back pressure or back
syphonage into the supply network is prevented. The pipe-
work connection is interrupted and the drinking water network
is protected.
3. Application
Medium
Inlet pressure
Operating pressure
4. Technical data
Installation position
Max. operating temperature
Discharge pipe connection
Connection size
5. Scope of delivery
The backflow preventer consists of:
• Housing
• Inlet and outlet check valves
• Discharge valve
• Three ball valves for the connection of a differential pres-
sure gauge
6. Options
BA300-... A = Standard version, connection sizes DN 65 - 200
connection with flanges, PN 10
Connection size
MU1H-1242GE23 R0714
is higher than in zone
. A discharge valve is
and drops to 0.14
discharges to atmosphere, both
from zone
Water
max. 10.0 bar
min. 1.5 bar
Horizontal with discharge
valve downwards
65 °C
DN150
DN65 - DN200
GB
7. Assembly
7.1. Installations Guidelines
• Install shutoff valves before and after backflow preventer
• Install backflow preventer downstream of the filter or
strainer
- This protects the appliance against dirt
• Install in horizontal pipework with the discharge valve
downwards
• Ensure good access
- Simplifies maintenance and inspection
• 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
• Where backflow preventers are installed care must be
taken that discharges are safely carried away by the
discharge pipework.
• Inlet pressure fluctuation, even without water draw off, can
,
lead to brief operation of the discharge valve. It is therefore
recommended that a pressure reducing valve be fitted
upstream of the backflow preventer.
• No other unprotected potable water system may be
connected downstream of the back flow preventer.
• Individual connections in the downstream system are not
protected against backflow or back syphonage. If required,
further protective measures can be installed as necessary
to protect individual parts of the system
• The backflow preventer must be installed so that the
discharge valve is above the surrounding maximum water
table..
Use and type of installation according to DIN EN 1717
7.2. Assembly instructions
1. Thoroughly flush pipework
2. Ensure that connections on back flow preventer are clean
3. Install backflow preventer
• Install in horizontal pipework with discharge connection
directed downwards
• Note flow direction (indicated by arrow)
• 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
• Maintain assembly distances
• Load the eye screw only in axial direction
• Connect discharge pipework close coupled and without
tight bends according to connection dimensions (see
table)
• Install discharge pipework in such a way that the discharge
connection and the discharge valve can be removed for
inspection
6 Honeywell GmbH