Introduction; Description; Applications; Main Features - Elsteam VEH Series Manual

1. INTRODUCTION

1.1 Description

The VEH series is ELSTEAM's solution for immersed electrode humidification systems dedicated to installations within air
handling units (AHUs).
The VEH series consists of 2 elements:
• Electric panel;
• Hydraulic unit.
VEH series humidifiers generate humidity (steam) by means of a current passing between 4 or more electrodes immersed in
drinkingwaterandbringingittoboilingpoint.
Thesteamiscontrolledbyadjustingtheintensityofthecurrenttransferredtothewaterbytheimmersedelectrodes,which
indirectly controls the boiling of the water.
Steam is produced and pumped directly into an AHU (air handling unit) or into an air conditioning duct by positioning the
hydraulic module inside the unit.
VEHserieshumidifiersdonotrequireatechnicalareaifinstalledoutdoors,asthehydraulicunitisinstalledinsidetheAHU;
plus,itisnotaffectedbycondensationinthesteamsupplypipe,asitintroducessteamfromthehydraulicunitdirectlyinto
theAHU,alsoovercomingdifferencesinpressure.Thehydraulicunitisnotsubjecttodropsinenergyefficiencycausedby
condensation and low outdoor temperatures.
Topreventtheicefromformingduringwinter,useheatingcablesforthewatersupplyanddischargepipes.
NOTE: VEH series humidifiers are defined as "NOT ACCESSIBLE TO THE PUBLIC".

1.2 Applications

The VEH seriesismainlyusedinapplicationsrequiringsterilesteam,including:
• Hospital settings;
• Medical settings;
• Commercialsettings(offices,industrialpremises,etc.);
• Industrial processes which use AHUs.

1.3 Main features

• Isothermalhumidifier;
• Sterilesteam(steamwithatemperatureofapproximately100°C(212°F));
• Automatic removal of limescale from the electrodes and boiler (reusable);
• Broadrangeofsteamproduction(10...100kg/h);
•  I ntegratedelectroniccontrolviaprobeorhumidistat(withexternalON/OFFsignal,orproportionalmodefromexternal
signal0...10V/4...20mAorinternalconfiguration);
• Stainless steel water drainage tray (on request);
• StainlesssteelcondensatecollectiontankforAHUs(onrequest).

1.3.1 Electronic control features

• Proportional (logarithmic) microprocessor control of steam production;
• Highefficiency;
• Rapid response to changes in requirements;
• Precise production control.
• Automatic electrode and boiler cleaning system:
• Reduced maintenance frequency;
• High performance levels;
• Longer electrode and boiler life.
• Automatic hydraulic unit discharge:
•  R emovaloflimescaleresiduesdepositedinthemanifoldsleevefacilitatedbytheactionofthedrainagepump,which
can even eliminate medium-sized clusters and grind them down;
• Longer boiler life.
• Operatingstatussignallingviaauserinterfacewitha2-line,16-characterdisplay:
• Continuous monitoring of the operating status;
• Automatic analysis of malfunctions.
924VHE4.02 - VEH series humidifiers |8| 02/2022