Commissioning and Maintenance
© robatherm 59
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Set Value
Setting values for hygienic monitoring can be established from the lowest thickening count:
Value limit for electrical conductivity =
Lowest thickening count x electrical conductivity of fresh water
(Rated value for blow down device or for monitoring with HYGIENECONTROL)
Cleaning interval =
Sump capacity x (thickening count – 1)/ evaporated water quantity
(Setting value for time clock of HYGIENECONTROL)
Note
These settings values are approximations and do not replace the additional monitoring of
germ counts.
We recommend the use of test systems (Dip-Slides). Follow instructions for use.
Fresh Water Pressure
The ball valve is acceptable up to an operating pressure of max. 6 bar.
We recommend a fresh water pressure of at least 3 bar; if necessary install booster system.
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Adiabatic Humidification of Extract Air
Excessive humidity shall be avoided upstream of the rotor to prevent its matrix from over-
wetting. If ever possible, permeate from the reverse osmosis should be used to operate the
humidifier.
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Commissioning
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Caution
Observe general safety instructions on page 3!
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Only use approved parts with ATEX units. All electrical parts must be earthed.
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Cleaning
Clean foreign bodies out of humidifier sump, clean contamination with water and cleaning
agent (non-foaming, pH-value 7 - 9).
Note
Remove swarf thoroughly, otherwise there is a risk of pitting!
Filling
Fill humidifier sump up to 10 to 20 mm below the overflow connector and set ball valve at
this level by adjusting the knurled screw.
Note
When operating the spray humidifier there must be an airflow of at least 1 m/s (related to
inside cross section of casing) against the spraying direction in order to avoid rectifier
breakdown.
Treated water must be removed from galvanized parts immediately. White rust formation!
Pump
Put pump into operation. Follow instructions of the pump manufacturer.
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