Discharge Of Reverse Rinsing Water; Start-Up; Reverse Rinsing; Maintenance - Buderus 7738306430 Instrucciones De Montaje

7.3. Discharge of reverse rinsing water

The reverse rinsing water must be routed to the drain channel
in such a way that no backwater can occur.
To do this there are 3 options:
1. Direct connection:
• Connector DN 50/70 as well as the necessary pipes
and siphon (3 elbows 90°) in DN 70.
2. Discharge into floor drain
3. Drain into open container.
Filter size Reverse rinsing volume*
3/4" 12 litre
1" and 1 1/4" 15 litre
*at 4 bar inlet pressure and 3 x 3 seconds reverse rinsing
duration

8. Start-up

8.1. Setting outlet pressure (filter combinations
only)
Set outlet pressure min. 1 bar under inlet pressure.
1. Close shutoff valve on inlet
2. Close shutoff valve on outlet
3. Release pressure on outlet side (e.g. through water tap)
4. Slacken tension in compression spring
• Lift adjustment handle
• Turn adjustment handle counter clockwise (-) until it
does not move any more
5. Slowly open shutoff valve on inlet
6. Turn adjuster knob until the manometer shows the
desired value.
• Turn clockwise = increase pressure on outlet side
• Turn counter-clockwise = reduce pressure on outlet
side
7. Push the adjuster knob down and latch it in to activate the
locking mechanism
8. Slowly open shutoff valve on outlet
2012/05
en

8.2. Reverse rinsing

During reverse rinsing, an inlet pressure of at least 1.5 bar is
required. The reverse rinsing interval depends on the degree
of dirt in the water. At the latest every 2 months, reverse
rinsing should be carried out according to DIN 1988, Part 8.
To ensure convenient and regular adherence to the reverse
rinsing interval, we recommend installing an automated
reverse rinsing system Z74S-AN (see accessories).
Filtered water can also be tapped during reverse
rinsing.
If reverse rinsing water is not to be discharged via a direct
connection, a collecting container must be positioned
beneath before reverse rinsing.
1. Open ball valve by turning the reverse rinsing handle to
the stop
• Handle must be upright
• The patented reverse rinsing system starts
2. Close ball valve again after approx. 3 seconds. Repeat
procedure three times
• If the filter is extremely dirty, the procedure may have to
be repeated additional times
With aid of the memory ring, the next deadline for
manual reverse rinsing can be booked.

9. Maintenance

We recommend a planned maintenance contract
with an installation company
In accordance with DIN 1988, part 8, the following measures
must be taken:
9.1. Inspection
9.1.1. Pressure reducing valve (filter combinations only)
Interval: once a year
1. Close shutoff valve on outlet
2. Check outlet pressure using a pressure meter when there
is zero through-flow
• If the pressure is increasing slowly, the valve may be
dirty or defective. In this instance, carry out servicing
and cleaning
3. Slowly open shutoff valve on outlet
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