Wilo Wilo-Sevio AIR, Инструкция по установке и эксплуатации

Страница: 30 / 39

64 WILO SE 11/2012 Ed.03 DIN A5
English START-UP
6.1.2. Basic cleaning of the operating area
The operating area can be heavily soiled during installation. This soiling can negatively
influence the air inclusion or damage the disc aerator. For this reason you should clean
the entire operating area with clear water and remove soiling. Course soiling and foreign
bodies must be removed by hand.
The stream of water must not directly impact the membrane, since this can lead to
damage.
6.1.3. Function test / clear water test
A function test is used to ensure that all components are tight and that the aerator
groups are working flawlessly. A function test is conducted with clear water.
During the function test, people must be in the basin to inspect the aerator groups.
Inspection from the corners or from outside of the operating area is not permitted.
Fig. 12.: Function test in three steps
12.1 Tightness test of the pipes and of the disc aerator
12.2 Function test of the membranes
12.3 Tightness test of the intake line
1. Before the water is introduced into the operating area for the function test, air must
be introduced into the aerator system. This prevents water from penetrating into the
aerator system if there are any leaks.
2. Once the air supply is ensured, the operating area is slowly flooded with clear water.
3. In the first step, the water level must extend up to the halfway point of the threaded
ring on the disc aerator. If air bubbles emerge, the corresponding location must be
disassembled and the fault rectified. This can be caused by the following:
• Incorrect installation of the pipe coupling
• Defective sealing ring in the pipe coupling
• Defective sealing ring on the connection of the disc aerator
• Material fault
4. In the second step, the water level is increased to approx. 10 cm above the membranes.
With this water level, you can see whether all disc aerators are functioning flawlessly.
For this test, air pressurization of 1.5 Nm³/h to 6 Nm³/h must be present. If the pressur
-
ization is too low, the disc aerators do not operate flawlessly.
If there are defective disc aerators in the system, they need to be replaced. Before a
replacement can be made, the water must be completely pumped out so that no water
penetrates into the pipes.
If several disc aerators within a line are operating erratically, it is likely that water has
penetrated into the pipes. Open the drainage line to press out the water that has pene
-
trated into the pipes.