Armstrong EvaPack Series, Installation And Operation Manual

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Supplied water installation
EvaPack™ can work with different types of water: potable water, reverse osmosis or softened water. It is the
responsibility of the user to ensure that the water supply system is part of a managed, hygiene monitored
water system. Water quality must comply with the local regulations and laws.
Reverse osmosis water
Reverse osmosis water is water purified under pressure by a semipermeable membrane. This membrane
retains ions, molecules, and larger particles and allows only the water to pass to the other side. EvaPack™
pad accepts RO water with a conductivity > 1μS/cm at 20º C.
Softened Water
Softened water is hard water treated by ion-exchange resins. The resins remove the calcium, magnesium
cations of the water. It is essential that the salt maintenance of softeners be programmed for the water
volume consumed in order to prevent an excessive salt concentration to humidify once the regeneration
cycle is finished (please refer to the softener’s user manual).
Potable water
EvaPack™ air evaporative humidifier must be connected to a clean, potable (drinking water quality) water
supply.
EvaPack™ air evaporative humidifier must operate within potable tap water specifications (main sources:
Directive 98/83/CE and VDI 6022 requirements).
Organoleptic parameters
Parameter Parametric value Parameter Parametric value
Temperature (*) < 20°C Color Acceptable and no abnor-
mal change
Turbidity ≤ 2,0 NTU Odor Acceptable and no abnor-
mal change
Taste Acceptable and no abnor-
mal change
Microbiological parameters
Enterococci (¹) 0/100ml Pseudomonas aeruginosa 0/250ml
Coliform bacteria 0/100 ml Clostridium perfringens
(including spores)
0/100 ml
Escherichia coli (E. coli) 0/250 ml Legionella spp (2) (3) < 100 CFU/100 ml
Colony count 22ºC (1)
Colony count 37ºC (1)
Total colony number (2)
No variation in a ratio of 10
to the usual value of the inlet
water.
< 1000 CFU/ml
Sulfate-reducing bacteria (1)
(including spores)
0/100 ml
(In the event of non-com-
pliance with this value,
an investigation must be
carried out to ensure that
there is no danger to hu-
man health resulting from
the presence of pathoge-
nic micro-organisms, for
example Crystosporidium.)
(1) Value given by Directive 98/83/CE
(2) Value given by VDI 6022-4.3.7 for recirculating water in air humidifiers.
(3) This value must comply with potable water standards applicable in your country.
(4) EvaPack™ air evaporative humidifier must operate within these specifications.