Maintenance; Introduction - Elsteam VEH Series Manual

11. MAINTENANCE

VEH series humidifiers are defined as "NOT ACCESSIBLE TO THE PUBLIC".
RISK OF ELECTRIC SHOCK, EXPLOSION OR ELECTRIC ARC
• Anyprocedureonthehumidifier,includingmaintenanceofanytype,mustonlybecarriedoutwhilethepowersupplyis
disconnected.
• Themaintenance,repair,installationanduseoftheequipmentmustonlybeentrustedtoqualifiedpersonnel.
RISK OF BURNS
Beforecarryingoutanyworkonthesystem,placetheequipmentoutofserviceandwaitforthemachinetocooldown(<50
°C(122°F)).

11.1 Introduction

VEH series humidifiers are designed for operation with the water specifications indicated in sub-section"5.2.1 WATER
SPECIFICATIONS" ON PAGE 17.
Using water with different specifications and/or with a hardness level approaching the limit of 50 °f causes maintenance to be
required more frequently.
Asaguideline,thehydraulicunitrequiresfrequentmaintenanceandseasonalcleaninginthefollowingconditions:
Water conductivity
200...600 µS/cm
Itisnotpossibletoprovidecertaininstructionstodeterminethemaintenancefrequency,asitdependsheavilyonthe
morphologyofthewaterused,whichcanalsovaryunderequalspecifications(conductivityandhardness).
If using VEH series humidifierswithmorecriticalwaterconditions,forexample:
Water conductivity
700...1250 µS/cm
maintenancemustbecarriedoutmorefrequently,severaltimeperseason(evenweeklyinextremecases).
MALFUNCTIONING OF THE EQUIPMENT
Only use the humidifier with the water specifications indicated in this manual.
Iffrequentmaintenancetakesplace,checkthequalityofthewatersupply.
Furthermore,thehydraulicunitshouldbecleanedpromptlywhen:
•  T hedrainwaterisverydark(reddish/black)anddemonstratesthestartofelectrodecorrosion(*)causedbythehighly
aggressive nature of concentrated water (replace the electrodes if necessary);
•  T hehumidifierdoesnotworkproperly,triggeringthehighcurrentalarmfrequently.
NOTE:ahighconcentrationofsaltsinthewaterinsidetheboilerresultsinhighelectricalconductivity,whichcancause
various high current alarms and lead to frequent drain cycles;
• The hydraulic unit has reached 5 seasons or 24 months of continuous operation with maintenance performed in accordance
with best practices;
•  T herearelargeamountsoflimescalelinkedtovariationsincolourandsurfaceontheouterwallsofthehydraulicunit,due
to overheating caused by limescale bridges between the electrical phases (replace the electrodes if necessary);
NOTE:Limescaleinsidetheboilerisnormal,eveninlargeamounts,astheboilercollectsthelimescalepresentinthewater;
therefore performing maintenance/cleaning on it is essential for correct operation.
MALFUNCTIONING OF THE EQUIPMENT
Only carry out boiler maintenance in accordance with the instructions provided in the Maintenance section of this manual.
(*): The electrodes are made using AISI 316 steel with self-extinguishing engineering plastic parts.
•  T hereareleaksduetobreakages,cracksandfissures(replace the hydraulic unit).
NOTE:thewaterinsidetheboilerissubjectedtoelectricalvoltageandthereforeleaksfromtheboileraredangerous.
924VHE4.02 - VEH series humidifiers
DANGER
WARNING
Water hardness
Water hardness
NOTICE
NOTICE
| 34 |
10...30 °f
35...50 °f
02/2022