Nortec Air Humidification System BS - Manual (Page 16)

25.05.05-A page 16 of 30
4.3 Notes on the water supply
The DRAABE air humidification system is a hygienic system and therefore make particular demands
as far as the water to be atomised is concerned.
The systems can also be operated using untreated source water, but this involves different risks:
- In dependence on the quality of the untreated water, operating safety may be impaired.
- In dependence on the quality of the untreated water, hygiene may be impaired (depends on
the organic contamination of the untreated water).
- In dependence on the quality of the untreated water, a very pronounced mineral precipitation
may occur. These substances contained in untreated water precipitate out of the small
droplets (aerosols) and settle on all surfaces. The functioning of processes and machines
may be impaired and more cleaning needs to be done.
NOTE:
We recommend you to always use a DRAABE water treatment in order to achieve an optimum
result as far as hygiene and operating safety are concerned.
All requirements regarding water preparation listed below are extremely important in order to
ensure a safe, hygienic operation. The operator shall ensure that the following requirements
are met on a permanent basis. They are fulfilled when a DRAABE pure water system is used. It
also has to be subjected to regular checks and maintenance measures at regular intervals as a
matter of course.
Definition of terms:
- Untreated water: This kind of water is water to be subjected to water treatment. This kind of
water has to be treated. Other terms for untreated water are > drinking water, tap water.
- Soft water: see also 4.3.2 . This is water that has been softened.
- Treated water: This kind of water is a product of water treatment. Another term for treated water
is > permeate.
CAUTION: Despite compliance with these requirements, a contamination of the system can not be
excluded. Regular checks carried out by the operator are obligatory in order to avoid damage to
health.
4.3.1 Requirements regarding untreated water (drinking water or tap water)
The operator shall ensure that the following requirements are met on a permanent basis.
-
The water must be free of particulates > 5µ.
- The water has to be free from colloids and/or organic substances as a matter of principle.
- Well water and rain water are not admissible.
- The water must have drinking water quality (e.g. quantity of organic substances).
- The maximum number of germs may not exceed 1000 germs/ml.
- It has to be free from chemical substances/additives (e.g. ozone, disinfectants).
- No accessory devices that alter the properties of the untreated water (e.g. dosing equipment)
may be used.
- Water temperature 6-20 °C (43-68°F)
- Flow pressure 2-3 bar (43-58psi)
- Hardness maximum 20°dH (German hardness)