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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 42/197
4.5 CBF / CBF-UL: Water supply and dehumidification
4.5.1 General remarks on water supply
4.5.1.1 Water supply
Freshwater is supplied by manually filling a freshwater bag (tubular bag set, standard, can be reordered)
or a freshwater can (optional water container set). It is also possible to connect prefilled water bottles
(optional humidification water set). It is not possible to connect the chamber directly to a water pipe.
The freshwater bag has a volume of 0.9 liters / 0.32 cu.ft. and is placed behind the chamber door in a
recess.
To guarantee humidification during 24 hours even at high humidity set-points and / or
frequent door openings, we recommend checking the freshwater bag daily at the end of the
day.
When the freshwater can is empty, the message “Freshwater supply” will be displayed on the controller,
the buzzer sounds, and the humidification module turns off. After acknowledging the alarm, the
humidification module tries to fill up and start operating.
Water consumption at 37 °C / 98.6 °F and 93 % r.h.:
• Without opening the door: very low.
• When opening the door 10 times a day: approx. 70 ml per day.
4.5.1.2 Dehumidification
To reduce the humidity, ambient air is sucked in through a gas fine filter (sterile filter). As a result, the air in
the interior is diluted with the air from outside. The air tube for inlet of the ambient air is located in the upper
right corner in the recess for the freshwater bag. We recommend replacing the sterile filter on this tube
about once a month. To replace the sterile filter, see chap. 22.2.3.
4.5.1.3 Types of suitable water quality
• Deionized water from a water treatment installation already existing at the customer's site. Conductivity
from 1 µS /cm up to a maximum of 20 µS/cm. (Water, which is in equilibrium with the CO
2
in the air, and
has a conductivity below 1 µS/cm (ultrapure water), may cause acid corrosion due to its low pH).
• Tap water that has been treated by the optional water treatment system BINDER Pure Aqua Service
(disposable system). A reusable measuring equipment to assess the water quality is included (chap.
4.5.1.4).
BINDER GmbH is NOT responsible for the water quality at the user’s site.
Any problems and malfunctions that might arise following use of water of deviating quality is
excluded from liability by BINDER GmbH.
The warranty becomes void in the event of use of water of deviating quality.
NOTICE
Danger of calcification of the humidifying system.
Damage to the chamber.
Operate the chamber with deionized (demineralized) water only.
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