JBL PROAIR a50 Mode D'emploi page 13

Maintenance
External care: Remove any dirt on the housing with a moist cloth. Do not immerse the appliance in water!
Avoid a decrease in efficiency:
Air stones and other air-operated articles become clogged by limescale, etc. in the course of time. Therefore, the air stones
need to be checked from time to time and replaced if necessary. Check other air-operated articles for optimum passage
and clean them if necessary.
Diaphragm replacement:
Lower efficiency even when the air stones are not clogged can be an indication of a defective diaphragm. The diaphragm
may need to be replaced every 6 - 12 months. The diaphragm and other parts subject to wear and tear can be purchased
as a spare parts kit. Please make sure to always replace the entire kit in order to ensure optimum efficiency. This mainte-
nance work must only be carried out by a qualified person.
Other notes:
How to minimise noise: The JBL PROAIR
noise suppression chamber and a particularly thick housing. Nevertheless, the operating noise may be audible even when
optimally installed, especially at night in a quiet room.
Every air pump generates vibration and buzzing noises, which may be audible to a certain degree. These can be minimised
noticeably by counter-pressure. A reduction of the flow rate through a noise clamp or an air cock reduces the noise level
significantly.
Therefore never operate the air pump in "idle" mode i.e. without an attached hose with an air stone or similar! This
results in premature wear of the diaphragm and an increased noise level.
Air Pumps were developed according to the latest findings and equipped with a
®
DE
GB
FR
NL
IT
SE
ES
PT
PL
CZ
RU
RO
TR
GR
CN
11