Wilo Wilo-Sevio AIR, Инструкция по установке и эксплуатации

Страница: 37 / 39

Installation and operating instructions Wilo-Sevio AIR 71
MAINTENANCE English
8.2.4. Leak check of the aerator group(s)
Leaks become visible on the surface of the liquid through a change in the appearance of
the bubbles. Check the operating area from all sides for unusual bubble formation.
For this maintenance measure, we recommend carrying out a function test with clear
water and an inspection of the operating area.
8.2.5. maintenance measures of the compressors/blower
Carry out maintenance work according to the manufacturer’s specifications for the
devices.
8.2.6. Changing the filter
If filters are used in the air intake, they need to be cleaned or replaced on a regular basis.
You can find more information in the respective filter documentation.
8.3. Repairs
When carrying out repairs, you must:
• Switch off the system and make sure it cannot be switched on accidentally.
• Drain the operating area, thoroughly clean all components, and decontaminate them if
necessary.
• Never use brute force during any of this work.
8.3.1. What repairs may be carried out?
• Membrane replacement, including the non-return valve
• Disc aerator replacement
8.3.2. membrane replacement, including the non-return valve
1. Use the special key to loosen and unscrew the threaded ring on the disc aerator.
2. Remove the separation ring and membrane support.
3. Remove the non-return valve.
4. Pull off the membrane from the membrane support.
5. Attach a new membrane to the membrane support.
6. Attach a new non-return valve.
7. Fit the membrane support and separation ring.
8. Screw the threaded ring back on and tighten it securely using the special key.
Before the system is started up again, a function test must be conducted.
8.3.3. Disc aerator replacement
1. Use a rubber mallet to push down the slide closure on the underside of the disc aerator
against the direction of the arrow.
2. Remove the disc aerator.
3. Fit the new disc aerator onto the connection hole in the aerator pipe.
Important The connection of the disc aerator must be completely on the connection
hole and the o ring must seal the connection!