Installation CAIRplus
44 PR-2009-0096-GB • Subject to modifications • R8-10/2015
6.3.4 Installing humidifier
Refer to the supplied documentation for instructions on assembly and installation.
• Also observe the German Drinking Water Act (Trinkwasserverordnung – TWVo).
The following recommendation applies “Guide values for the quality of water circulating
in the spray humidifier (air washer)” (in accordance with: VDI 3803 “HVAC systems.
Constructional and technical requirements”, February 2010, Appendix A, Table A1).
Quality
Room-ventilation system equipment for:
Room-air quality
IDA 2, IDA 3 or
IDA 4 according to EN
13779
Room-air quality
IDA 1 according to EN
13779
for IT rooms
Room-air quality
IDA 1 according to EN
13779 for sterile and
cleanrooms
indirect evaporative cooling
(to be determined depending on the system)
Appearance – klar, farblos und ohne Bodensatz
pH value
– 7 to 8.5
Total salt concentration TSC g/m³ < 800 < 250 < 100
Electrical conductivity
(at reference temperature 20 °C)
mS/m < 100 < 30 < 12
μS/cm < 1000 < 300 < 120
Calcium
Ca
2+
mol/m
3
> 0.5
g/m
3
> 20
Carbonate hardness
KH °dH < 4
Total hardness
GH °dH < 7
Chloride
CL
-
mol/m
3
< 5
g/m
3
< 180
Sulphate
SO
4
2-
mol/m
3
< 1.5 < 1
g/m
3
< 150 < 100
Consumption KMnO
4
g/m
3
< 50 < 20 < 10
Microbial count
CFU (colony
forming units)/
mL
< 1000 < 100 < 10
Legionella bacteria CFU/100 mL < 100
Notice!
When installing a water-softening unit DencoHappel recommends to repeat the
water analysis. The total salt concentration shall not exceed 250 g/m³! The elec-
trical conductivity shall not exceed 300 µS!
ATTENTION
Risk of damage to the unit!
• Do not operate honeycomb humidifiers with fully demineralized water.
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