Operating Manual Xenotest
®
220/220+
- 12 -
3
Requirements for the installation site
3.1 Room climate
Climatic requirements for the installation room:
In continuous operation the Xenotest 220/220+ can
cause a constant change in the room climate due to the
emission of warm air. Therefore, the instrument should
only be installed in an adequately cooled, dust-free
operating rooms.
• Room temperatures of 18 °C to 25 °C
• Relative humidity of 50% (± 10%)
3.2 Room ventilation
The installation room must be equipped with a ventilation
system that can accommodate a fresh air volume flow of
at least 300 m³/h.
• The fresh air must be filtered through an air filter of
filter class EU 4
• The installation room must be kept dust-free
3.3 Instrument exhaust air system
It is highly recommended that the lamp cooling of the
Xenotest 220/220+ be connected to an exhaust air system.
The exhaust air of the lamp cooling can be fed directly
outdoors. The exhaust air system must satisfy the follow-
ing conditions:
• The exhaust air channel must be made of flexible,
heat-resistant material because the temperature of
the exhaust air can rise to up to 120 °C
• The exhaust air channel may be a maximum of 3 m
long
• The diameter of the exhaust air channel must be at
least 100 mm. The connection nozzle on the Xenotest
220/220+ has a diameter of 100 mm
• The exhaust air channel may have a maximum of two
90° bends
• If greater lengths than 3 m or more than two 90° bends
are necessary for laying the exhaust air channel, a
blower must be installed by the customer
• The exhaust air system must work in such a way that
no air can be blown back into the instrument by back
pressure (see also Atlas price list)
The exhaust air of the test chamber can be fed into the
operating room and recirculated by the room ventilation.
NOTE – protective system failure
The instrument exhaust air system can overheat if the
maximum length of the exhaust air channel and the maxi-
mum permissible number of two 90° bends is not observed.
This results in the protective mechanisms of the Xenotest
220/220+ interrupting the power supply to the instrument.
