Safety Guidelines; Description Of Function; Application; Technical Data - Buderus 7738306430 Instrucciones De Montaje

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 filter insert comprises an upper part and a lower combi-
nation section. When in the „filtering" position, the small upper
filter is closed so that the water can only pass through the
main filter from outside to inside. When the ball valve is
opened for reverse rinsing, the filter is pushed downwards
until the water supply to the outer side of the main filter is
stopped. Simultaneously, the water flow is opened to the
upper part of the filter. The water needed for cleaning the filter
passes through the upper sieve, the rotating impeller and the
main filter from inside to outside. By this means, the filter is
fully cleaned over its whole surface area at the full inlet pres-
sure. The filter automatically switches over to the operating
position when the ball valve is closed again.
The filter combination combines reverse rinsing filter and
pressure reducing valve in one appliance.
The integral pressure reducing valve functions on a balanced
force principle whereby the force exerted by a diaphragm is
balanced against the force of an adjustment spring. The inlet
pressure has no influence on opening or closing of the valve.
Inlet pressure fluctuation does not therefore affect the outlet
pressure.

3. Application

Medium Water
Inlet pressure Maximum 16.0 bar
Outlet pressure 1.5 - 6.0 bar
The filter is constructed for drinking water installations. In
case of a process water application the filter has to be proven
individually.

4. Technical data

Installation position
Operating pressure
Operating temperature
Connection size
6720803833
Vertical or horizontal,
with filter bowl downwards
Minimum 1.5 bar
Maximum 30 °C
/ ", 1", 1 / "
3 1
4 4
en

5. Scope of delivery

The filter combinations comprises:
• Housing with pressure gauge
• Spring bonnet with adjustment knob
• Valve insert complete with diaphragm and valve seat
• Rotatable connector piece
• Fittings
• Fine filter in clear filter bowl
• Ball valve with drain connection
• Double ring wrench
The reverse rinsing filters comprises:
• Housing with pressure gauge
• Threaded connections
• Rotatable connector piece
• Fine filter in clear filter bowl
• Ball valve with drain connection
• Double wring wrench

6. Options

7738306430 Reverse rinsing filter 3/4"
7738306431 Reverse rinsing filter 1"
7738306432 Reverse rinsing filter 11/4"
7738306433 Filter combination 3/4"
7738306434 Filter combination 1"
7738306435 Filter combination 11/4"

7. Assembly

7.1. Installations Guidelines

• The installation site has to be frost-proof and the protection
of the device from chemicals, paints, detergents, solvents
and their vapours and environmental influences must be
guaranteed.
• Install in horizontal or vertical pipework with filter bowl
downwards
- This position ensures optimum filter efficiency
• Install shutoff valves
• Ensure good access
- Pressure gauge can be read off easily
- Degree of contamination can be seen with clear filter
bowl
- Simplifies maintenance and inspection
• It is recommended that a straight section of pipework at
least five times the nominal valve size is provided after the
filter combination (according to DIN EN 806, part 2)
• Fit immediately after water meter
- Meets DIN 1988, part 200
7.2. Assembly instructions
1. Thoroughly flush pipework
2. Install rotatable connector piece
• Note flow direction
• Install without tension or bending stresses
3. Install filter with sealing to rotatable connector
4. Seal in pressure gauge
9 2012/05