magnetic
®
...einfach besser
7.3 Backwashing, desludging, container cleaning
A specialist should carry out rinsing.
1. Stop the water flow.
2. Close the cut-off valves (1) in the inlet and outlet.
3. For rinsing, connect the water pipe to the drain valve (2).
Open the drain valve (2). Demineralised water is ideal for
rinsing.
4. Collect the rinsing water from the ball valve (3) using a
bucket or use a hosepipe to dispose of the rinsing water in the
drain.
5. Open the ball valve slowly (Figure 2 -
) and raise the
magnet
on the magnetic flux filter using the chain (Figure 2-
).
If no water comes out, carefully stick a wire (e.g. a welding
rod) through the ball valve (3) into the device in order to loosen
impurities. If this is not successful, you will need to open the
HWR, as described in the chapter on anode replacement.
Then it is necessary to clean the vessel through the upper
opening. In case of stubborn deposits on the walls, you can
use a diluted acid such as e.g. citric acid in order to clean the
container walls.
CAUTION!! Always neutralise the container after cleaning
using acid.
Rinse it until clean water runs out of the device. After the rinse process, close the ball valve (3) and fill the HWR with water.
6. After rinsing is concluded, lower the magnet on the chain again. Open the ball valve (1) on the supply line to the HWR again
commission the pumps again. Where applicable, check the flow volume of a heating water regulator in bypass installation.
7. Enter the rinsing process and measuring values in the maintenance form for the regulator.
The following rinsing intervals should be maintained:
- 1. Rinsing 4 weeks after installing the HWR
- 2. Rinsing after another 4 weeks
As soon as the rinsing water is clean from the start, switch to rinsing annually. Otherwise rinse every 4-8 weeks. During normal
operation, the device should be rinsed and checked once a year as part of heating maintenance. If the HWR is installed in a
new system, you can skip the rinsing series following installation. In this case, it is sufficient to rinse once a year.
7.4 Monitoring water quality
The pH value and electrical conductivity of the heating water must be documented as part of maintenance. In addition, we
recommend a comprehensive water analysis from a laboratory.
Anodenstrom
1
m
3
0 1
2
3
4
5
6
7
8
9
0 1
2
3
4
5
6
7
8
9
0 1
2
3
4
5
6
7
8
9
0 1
2
3
4
5
6
7
8
9
0
0
0
0
0
1
2
3
minimum distance
1000 mm
flow
return
Anodenstrom
Figur
e 2