Stulz SupraSteam SEH Series User manual
Electrode steam humidifier
STULZ SupraSteam®
STULZ the natural choice
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WARNING
The product must be installed with the earthconnected, using the special yellow-green terminal on the terminal block. Do
not use the neutral for the earth connection.
Save time and money!
A diligent reading of this manual guarantees a proper installation and a secure use of the described products.
IMPORTANT
The STULZ humidifiers are advanced products, whose operation is specified in the technical documentation supplied with
the product or can be downloaded, even prior to purchase, from the website www.stulz.com. Each STULZ product, in rela-
tion to its advanced level of technology, requires setup/confi guration/ programming/commissioning to be able to operate in
the best possible way for the specific application. The failure to complete such operations, which are required/ indicated in
the user manual, may cause the final product to malfunction; STULZ accepts no liability in such cases.
The customer (manufacturer, developer or installer of the final equipment) accepts all liability and risk relating to the confi
guration of the product in order to reach the expected results in relation to the specific final installation and/or equipment.
STULZ may, based on specific agreements, acts as a consultant for the installation/ commissioning/use of the unit, however
in no case does it accept liability for the correct operation of the humidifier and the final installation if the warnings or sug-
gestions provided in this manual or in other product technical documents are not heeded. In addition to observing the above
warnings and suggestions, the following warnings must be heeded for the correct use of the product:
• DANGEROFELECTRICSHOCK
The humidifier contains live electrical components. Disconnect the mains power supply before accessing inside parts
or during maintenance and installation.
• DANGEROFWATERLEAKS
The humidifier automatically and constantly fills/drains certain quantities of water. Malfunctions in the connections or in
the humidifier may cause leaks.
• DANGEROFBURNS
Thehumidiercontainshightemperaturecomponentsanddeliverssteamat100°C/212°F
• Theenvironmentalandpowersupplyconditionsmustconformtothevaluesspeciedontheproductratinglabels.
• Theproductisdesignedexclusivelytohumidifyroomseitherdirectlyorthroughdistributionsystems(ducts).
• Onlyqualiedpersonnelwhoareawareofthenecessaryprecautionsandabletoperformtherequiredoperationscor-
rectly may install, operate or carry out technical service on the product.
• Onlywaterwiththecharacteristicsindicatedinthismanualmustbeusedforsteamproduction.
• Alloperationsontheproductmustbecarriedoutaccordingtotheinstructionsprovidedinthismanualandonthelabels
applied to the product. Any uses or modifications that are not authorised by the manufacturer are considered improper.
STULZ declines all liability for any such unauthorised use.
• Donotattempttoopenthehumidierinwaysotherthanthosespeciedinthemanual.
• Observethestandardsinforceintheplacewherethehumidierisinstalled.
• Keepthehumidieroutofthereachofchildrenandanimals.
• Donotinstallandusetheproductnearobjectsthatmaybedamagedwhenincontactwithwater(orcondensate).
STULZ declines all liability for direct or indirect damage following water leaks from the humidifier.
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• Donotusecorrosivechemicals,solventsoraggressivedetergentstocleantheinsideandoutsidepartsofthehumidi-
er,unlessspecicallyindicatedintheusermanual.
• Donotdrop,hitorshakethehumidier,astheinsidepartsandtheliningsmaybeirreparablydamaged.
STULZadoptsapolicyofcontinualdevelopment.Consequently,STULZreservestherighttomakechangesandimprove-
mentstoanyproductdescribedinthisdocumentwithoutpriorwarning.
Thetechnicalspecicationsshowninthemanualmaybechangedwithoutpriorwarning.
TheliabilityofSTULZinrelationtoitsproductsisspeciedin theSTULZgeneralcontractconditions,availableonthe
websitewww.stulz.comand/orbyspecicagreementswithcustomers;specically,totheextentwhereallowedbyapplica-
blelegislation,innocasewillSTULZ,itsemployeesorsubsidiariesbeliableforanylostearningsorsales,lossesofdata
andinformation,costsofreplacementgoodsorservices,damagetothingsorpeople,downtimeoranydirect,indirect,
incidental, actual, punitive, exemplary, special or consequential damage of any kind whatsoever, whether contractual,
extra-contractualorduetonegligence,oranyotherliabilitiesderivingfromtheinstallation,useorimpossibilitytousethe
product,evenifSTULZoritssubsidiariesarewarnedofthepossibilityofsuchdamage.
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INDEX
1 MODELSANDDESCRIPTIONOFTHECOMPONENTS ...................................................................... 6
1.1 Models .......................................................................................................................................... 6
1.2 Description of the components ..................................................................................................... 7
1.3 Description of the water bearing components............................................................................... 8
2 CONTROL-ANDOPERATINGPRINCIPLE ........................................................................................... 9
2.1 Operatingprinciple ........................................................................................................................ 9
2.2 Controlprinciples .......................................................................................................................... 9
3 MOUNTING ........................................................................................................................................ 12
3.1 Receiptandstorage .................................................................................................................... 12
3.2 Positioning................................................................................................................................... 12
3.3 Fastening..................................................................................................................................... 12
3.4 Removalandreassemblyofthefrontcover ................................................................................ 13
4 WATERCONNECTIONS ...................................................................................................................... 14
4.1 Characteristicsofthesupplywater ............................................................................................. 14
4.2 Characteristicsofthedrainwater................................................................................................ 15
4.3 Pipeconnections......................................................................................................................... 15
4.4 Diagram of water connections..................................................................................................... 16
4.5 Checks........................................................................................................................................ 16
5 STEAMDISTRIBUTION........................................................................................................................ 17
5.1 Direct steam distribution: ventilated steam distributors ............................................................... 17
5.2 Steam distribution in cold rooms ................................................................................................. 17
5.3 Steamdistributioninducts-linearandconcentratedjetdistributors(OEM) .............................. 18
5.4 Concentratedjetsteamdistributor(OEM)................................................................................... 19
5.5 Positioningthelineardistributorsintheairduct.......................................................................... 19
5.6 Installation of the steam pipe ...................................................................................................... 20
5.7 Installation of the condensate return pipe ................................................................................... 21
5.8 Checks........................................................................................................................................ 21
6 ELECTRICALCONNECTIONS............................................................................................................. 22
6.1 Powersupplyvoltage .................................................................................................................. 22
6.2 Checkingthevoltageoftheauxiliarycircuittransformer............................................................. 23
6.3 Main control board ...................................................................................................................... 23
6.4 External control signals ............................................................................................................... 25
6.5 Auxiliary contacts ........................................................................................................................ 27
6.6 Checks........................................................................................................................................ 28
6.7 Single-phase wiring diagram for 1-5 kg/h humidifiers ................................................................. 29
6.8 Three-phase wiring diagram for 3-15 kg/h humidifiers ................................................................ 30
6.9 Three-phase wiring diagram for 25-65 kg/h humidifiers .............................................................. 31
6.10 Three-phase 25-65 kg/h boiler configuration............................................................................... 32
7 START-UP,CONTROLANDSHUT-DOWN ........................................................................................... 32
7.1 Preliminarychecks ....................................................................................................................... 32
7.2 Starting the unit............................................................................................................................ 33
7.3 The humidifier controller............................................................................................................... 34
7.4 Shut-down .................................................................................................................................... 36
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8 CONTROLLERHPARAMETERS ......................................................................................................... 36
8.1 Readingandsettingtheambienthumiditysetpoint ................................................................... 37
8.2 Readingandsettingthecontrolparameters–
reading the measurements ......................................................................................................... 37
8.3 Readingandsettingthecongurationparameters...................................................................... 38
8.4 Validity of the modifications to the parameters............................................................................ 42
8.5 Recallingthedefaultparameters(factorysettings) ..................................................................... 43
8.6 Resettingthehourcounter.......................................................................................................... 43
8.7 Displaying and modifying the unit of measure of the parameters ............................................... 43
9 THEREMOTECONTROL(optional)..................................................................................................... 44
9.1 Description of the remote control ................................................................................................ 44
9.2 Programmingfromtheremotecontrol......................................................................................... 45
9.3 Exiting the programming phase................................................................................................... 46
10MAINTENANCEANDSPAREPARTS .................................................................................................. 47
10.1 Replacingthecylinder................................................................................................................. 47
10.2 Maintenance of the other plumbing components ........................................................................ 48
10.3 Componentreplacement............................................................................................................. 49
10.4 Spare parts.................................................................................................................................. 50
11ALARMS,TROUBLESHOOTING .......................................................................................................... 53
11.1 Alarms ........................................................................................................................................ 53
11.2 Table of alarms and signals......................................................................................................... 54
11.3 Troubleshooting table .................................................................................................................. 56
12 SETTINGTHEALARMTHRESHOLDSANDOTHERFUNCTIONS .................................................... 57
12.1 Setting the alarm thresholds ....................................................................................................... 57
12.2 Otherfunctions............................................................................................................................ 58
13TECHNICALSPECIFICATIONS............................................................................................................ 60
13.1 Dimensions and weights ............................................................................................................. 61
13.2 Technical specifications of the remote control............................................................................. 61
13.3 Technical specifications of the ventilated steam distributor......................................................... 61
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S EH0153H40E
number
of electr.
phases (3)
type - supply voltage
(type V)
23 = 230
40 = 400
1 MODELS AND DESCRIPTION OF THE COMPONENTS
1.1 Models
The code denoting the model of humidifier is made up of 11 characters, with the following meaning:
Example: The code SEH0153H40E identifies an immersed Stulz electrode humidifier (SEH) with:
•ratedsteamcapacity15kg/h(015);
•3electricphases(3);
•internalcontroler(H);
•supplyvoltage400VAC(40);
•Europe-Version(E)
version
family prefix
Stulz Electrode Humidifier
type of control
H = steam baths (on-board
controller configurable)
rated instant
steam production
in kg/h
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1.
2.
3.
4.
5.
6.
7.
8.
9.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
0
11
1
12
10
10.
13.
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1.2 Description of the components
1.2.1 Description of the components up to 15 kg/h steam production
Fig. 1.2.1.1
1.2.2 Description of the components from 25 kg/h up to 65 kg/h steam production
Fig. 1.2.2.1
Key:
no. description
cylinder
drain electrovalve
remote control switch
fuse carrier
transformer
main board
ON-OFFswitch/
manual drain switch
power cable terminal
block
supply electrovalve
controller
Key:
no. description
cylinder
drain pump
drain electrovalve
TAM
remote control switch
transformer
relay
fuse carrier
power cable terminal
block
cable gland
ON-OFFswitch/
manual drain switch
main board
controller
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1
2
3
4
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1.3 Description of the water bearing components
1.3.1 Units up to 15 kg/h steam production
Fig. 1.3.1.1
1.3.2 Units from 25 kg/h up to 65 kg/h steam production
Fig. 1.3.2.1
ForthedescriptionofFig.1.3.1.1and1.3.2.1,refertothefollowingtable:
Tab. 1.3.2.1
* Device used to prevent water overflowing from the supply tank, above the safety level (for example, due to a controller
malfunction or leaking from the fill electrovalve or back pressure). The supply tank is fitted with an overflow diaphragm
that discharges the excess water through a special pipe. The overflow diaphragm is lower than the filling inlet, to prevent
back-flow into the supply pipe.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
16
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no. description
fill electrovalve
flow-rate limiter
supply pipe
fill pipe
overflow pipe
conductivity measuring electrodes
supply tank - overflow*
anti foam electrode
steam outlet
electrodes (2/6 in the single-phase model, 3/6 in the three-phase model)
cylinder casing
bottom filter
drain electrovalve
drain pump pipe
drain column
drain pump
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2 CONTROL AND OPERATING PRINCIPLE
2.1 Operating principle
In an electrode humidifier the production of humidity is obtained inside a cylinder (boiler) containing water that is heated
to and then held at boiling temperature. The water that evaporates over time is automatically replaced with water from the
mains supply. In an electrode humidifier the production of humidity is obtained inside a cylinder (boiler) containing
water that is heated to and then held at boiling temperature. The water that evaporates over time is automatically
replaced with water from the mains supply.
Thequantityofcurrentthatinitiallyowsdependsgreatlyonthetypeofwatersuppliedfromthemains.Normally,arecent-
ly-started cylinder has low current; nonetheless, over time the quantity of salts inside the water increases (evaporation in
fact does not carry the salts with it). This allows the level of current required by the machine to provide the quantity of
steam requested to be reached.
In stable operating conditions, the level of production required is automatically achieved using the water level control on the
boiler. This is in fact reflected in higher or lower levels of current.
The salts introduced by the automatic refilling of the water are partly deposited as lime scale inside the boiler, contributing
to the progressive depletion of the cylinder, and partly remain dissolved in the water. To avoid excessive accumulation of
salts, a quantity of water is periodically and automatically drained and then replaced with fresh water.
2.2 Control principles
The range of humidifiers includes the following control options.
2.2.1 ON/OFF control – P controllers; H controllers with parameter A0=0
The action is all or nothing, activated by an external contact that thus determines the set point and the control differential.
The external contact can be a humidostat:
• closed:humidierproducessteamifalsotheremoteON/OFFcontactisclosedtoo.
• open:steamproductionisstoppedwhenthecurrentevaporationcycleends(itmaytakemaximum10-15minsincecon-
tactopens).Notethatwhentheremoteon/offcontactopens,steamproductionisimmediatelystopped,regardlessthe
current evaporation cycle has finished.
2.2.2 Proportional control – P controllers; H controllers with parameter A0=1
The steam production (hourly quantity) is proportional to the value of a signal Y coming from an external device; the type
of signal (H controllers only) can be selected from the following standards: 0 to 1 Vdc, 0 to 10 Vdc, 2 to 10 Vdc, 0 to 20
mA,4to20mA;fortypePcontrollers,thesignalis0to10Vdcandcannotbemodied.TheentirerangeiscalledtheBP
(proportional band).
Themaximumproduction,Pmax,correspondingto5%lessthanthemaximumvalueoftheexternalsignalY,canbepro-
grammed(typeHcontrollersonly)between20%and100%oftheratedvalueofthehumidier(parameterP0).
Theminimumproduction,Pminissetat20%oftheratedvalue,withtheactivationhysteresis,valuehy,equalto2%forP
controllersandequal5%forHcontrollersoftheentireBPoftheexternalsignalY.
Fig. 2.2.2.1
ONOFF
hyhy
BP
Pmax
Pmin
Y
hy
P6
P0
Pmin
P1
P5
ST
OFF ON
ON OFF % rH
ONOFF
hy
hy
hy
BP
Pmax
Pmin
Y
controllers with parameter A0= 1
Steam production
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2.2.3 Autonomous control with relative humidity transducer - H controllers with param. A0=2
Steam production is linked to the measurement of % rH, performed by the relative humidity transducer connected to the
controller, and increases as the distance from the set point St increases.
The maximum production P0, which occurs when the relative humidity is less that the set point by a value at least P1, can
be programmed between 20% and 100% of the rated value of the humidifier. The minimum production Pmin is set at 20%
of the rated value, with an activation hysteresis provided by the value hy, equal to 10% of P1.
The dehumidification function, if enabled (parameter b 1= odd number, see Table. 8.3.2), overlaps the control diagram and
is activated when the relative humidity % rH, transmitted by the transducer, is higher than St by a programmable quantity
P5+P6; the hysteresis of the step, also programmable, is equal to P6.
To check that the relative humidity measured by the transducer is within the pre-set values, the controller with autonomous
control allows two alarm thresholds to be programmed (also see paragraph 12.1):
• high relative humidity alarm threshold P2;
• low relative humidity alarm threshold P3.
In case of exceeding / falling below this threshold after an adjustable delay P4, an alarm state is activated and the contact
of the corresponding relay on the main controller board is closed.
Fig. 2.2.3.1
ONOFF
hyhy
BP
Pmax
Pmin
Y
hy
P6
P0
Pmin
P1
P5
ST
OFF ON
ON OFF % rH
ONOFF
hy
hy
hy
BP
Pmax
Pmin
Y
activated
DEHUMIDIFICATION
deactivated
Steam production
Steam
production
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2.2.4 Autonomous control with ambient relative humidity transducer and compensation transducer for limiting the
outlet humidity – (parameter A0=3)
Inthiscasetoothecontrollermodulatessteamproductionasafunctionofthemeasurement%rHperformedbythemain
relativehumiditytransducer(seepar.11.3),however,inaddition,itsentityislimitediftherelativehumidity%rH2measured
by a second compensation transducer placed in the air duct downstream from the humidifier exceeds the maximum desired
value.
ThecompensationprobehasitsownsetpointP7anddifferentialP8,basedonwhichthelimitofproductioniscalculated
(seeFig.2.2.4.1).
The production associated to the compensation transducer is limited to a value that increases with the difference.
To prevent the relative humidity measured by the transducer in the air duct downstream from the humidifier exceeding a
valueconsideredasexcessive,thecontrolmoduleinthismodeallowsahighoutletrelativehumidityalarmthresholdP9,
to be programmed (also see par. 12.1).
Ifthisthresholdisexceeded,afteraprogrammabledelayP4,analarmstateisactivated,withclosingofthecontactofthe
corresponding relay on the main control board.
Fig. 2.2.4.1
2.2.5 Application for steam baths: control with temperature transducer – (parameter A0=4)
In applications for steam baths, where the control probe measures temperature rather than humidity, the same considera-
tions are valid as described in paragraph 2.2.3, replacing relative humidity with temperature.
The dehumidification function is not available in this operating mode.
Hightemperaturelimit60°C,seeTable8.2.1(P2).
10% P8
P0
Pmin
P8 P7
ON OFF
Limitprobe(%rH2)
Productionlimit%
Steam
production
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A B C D E F
300 200 200 400 700 <0,5°
Modell SEH 001...008 SEH 010...015 SEH 025...045 SEH065
X 220 220 310 400
Y 500 590 725 785
Z 115 38
Z’ 112
A
B
C
D
E
F
X
A B C D E F
300 200 200 400 700 <0.5°
Model SEH 001...008 SEH 010...015 SEH 025...045 SEH065
X 220 220 310 400
Y 500 590 725 785
Z 115 38
Z’ 112
A
B
C
D
E
F
X
A B C D E F
300 200 200 400 700 <0,5°
Modell SEH 001...008 SEH 010...015 SEH 025...045 SEH065
X 220 220 310 400
Y 500 590 725 785
Z 115 38
Z’ 112
A
B
C
D
E
F
X
A B C D E F
300 200 200 400 700 <0,5°
Modell SEH 001...008 SEH 010...015 SEH 025...045 SEH065
X 220 220 310 400
Y 500 590 725 785
Z 115 38
Z’ 112
A
B
C
D
E
F
X
3 MOUNTING
3.1 Receipt and storage
Checkthatthehumidierisintactuponreceiptandimmediatelynotifytheshippingagent,inwriting,ofanydamagethat
may be due to improper or careless transport. Move the humidifier to the place of installation before removing it from the
packaging,graspingtheneckonlyfrombelowthebase.Openthebox,removethelayerofprotectivematerialandtakeout
the humidifier, keeping it vertical at all times; only remove the protective bag when installing the unit.
3.2 Positioning
Forinstallationchoosethemostsuitablepositionforthesteamdistribution,thatisthepositionthatminimisesthelength
of the steam outlet pipe, or alternatively, in the case of direct humidification into the room using a ventilated distributor, in
acentralpositionintheroombeinghumidied(seeChap.5).Theunithasbeendesignedforwall-mounting,andthewall
must be able to support the weight of the unit in normal operating conditions (see par. 13.1).The metal casing of the humidi-
erheatsupduringoperation,andtherearpartincontactwiththewallmayreachtemperaturesofover60°C;checkthat
this does not cause any problems. Make sure the humidifier is level, and that the minimum spaces are respected as per the
drawing, to allow room for maintenance operations.
Fig. 3.2.1
3.3 Fastening
The appliance must be wall-mounted using three screws: two upper screws, for fastening the support bracket, and one low-
er,centralscrew,tofastentheunitintoplace.Forthedistances(inmm),seeFig.3.3.1.Fasten(seeFigs.3.3.1and.2)the
bracket supplied with the humidifier to the wall, checking that it is horizontal using a spirit level, if the unit is mounted on a
brick wall, plastic screw anchors (diam. 8 mm) and the screws (diam. 5mm x L= 50 mm) supplied may be used.
Hang the appliance on the bracketusingthebandlocatedonthetopedgeoftherearoftheunit.Finally,fastentheappli-
ance to thewallusingthecentralholeintherearpartofthebase,thiscanbeeasilyreachedfrombelow.Fortheweights
and dimensions, see par. 13.1.
Fig. 3.3.1
Fig. 3.3.2
Dimension in
mm
bracket
A B C D E F
300 200 200 400 700 <0.5°
Model SEH 001...008 SEH 010...015 SEH 025...045 SEH065
X 220 220 310 400
Y 500 590 725 785
Z 115 38
Z’ 112
A
B
C
D
E
F
X
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3.4 Removal and reassembly of the front cover
WithreferencetoFig.3.4.1,toremovethefrontcoverofthehumidier,proceedasfollows:
• turntheoval-shapedplatewiththeSTULZlogo90°revealingtheheadofthegroundscrewbelow;
• removethescrewusingascrewdriver;
• holdthecoverbythesidesandliftitaround2cm,removingtheendstripsfromtheprotrudingedgesofthecoverand
the base of the structure;
• removethecoverbymovingitforwards.
To close the appliance, proceed as follows:
• turntheoval-shapedplatewiththeSTULZlogo,revealingthefasteningholebelow;
• slipthecoverontothestructure,keepingitslighüyraised,untilitrestsontherearedges,andthenmoveitdownwards,
slotting upper and lower end strips into the edges of the cover and the base of the structure respectively; check that the
fastening hole below the logo is in line with the threaded bush on the structure;
• tightenthegroundscrewusingascrewdriver;
• close(turn)theoval-shapedplatewiththeSTULZlogo.
Fig. 3.4.1 Fig. 3.4.2
For the humidifiers from 25 to 65kg/h
To remove the front cover, proceed as follows:
• turntheoval-shapedplatewiththeSTULZlogo90°revealingtheheadofthegroundscrewbelow;
• removethescrewusingascrewdriver;
• holdthecoverusingthesidehandlesandliftitupwards,makingsurethatthehooksonthesidesareremovedfromthe
structure;
• removethecoverbyslidingitoffforwards.
To close the appliance, proceed as follows:
• turntheredoval-shapedplatewiththeSTULZlogo,revealingthefasteningholebelow;
• slipthecoverontothestructure,keepingitslightyraised,untilthehooksslideintothestructure;checkthatthefastening
hole below the logo is in line with the threaded bush on the structure;
• tightenthegroundscrewusingascrewdriver;
• close(turn)theoval-shapedplatewiththeSTULZlogo.
Handle
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4 WATER CONNECTIONS
Beforemakingtheconnections,ensurethatthemachineisdisconnectedfromthemainspowersupply.
4.1 Characteristics of the supply water
The humidifier must be supplied with mains water with the following characteristics:
• pressurebetween0.1and0.8MPa(1and8bar),temperaturebetween1and40°Candinstantow-ratenolower
than the rating of the fill electrovalve
• hardnessnogreaterthan22°dH(equalto400ppmofCaCO3), conductivity: from 125 to 1250 µS/cm
• absenceoforganiccompounds
• thecharacteristicsofthewaterofsupplymustfallwithinthefollowinglimits:
A LIMIT VALUES FOR THE SUPPLY WATER TO AN IMMERSED ELECTRODE HUMIDIFIER RUNNING
ON NORMAL WATER
Tab. 4.1.1
(*) Values dependent on the specific conductivity; in general: cR≅0,65 * σR, 20°C;R180 ≅0,9 * σR,20°C
B LIMIT VALUES FOR THE SUPPLY WATER TO AN IMMERSED ELECTRODE HUMIDIFIER RUNNING
ON WATER WITH A LOW SALT CONTENT
Tab. 4.1.2
(*) Values dependent on the specific conductivity; in general: cR≅0,65 * σR, 20°C;R180 ≅0,9 * σR,20°C
A G 3/4 M fitting is used for the water connection.
Note:Norelationshipcanbedemonstratedbetweenthehardnessandtheconductivityofthewater.
IMPORTANT WARNING: The water does not need to be treated with softeners! This may lead to the formation of foam,
with potential operating problems or anomalies!
The following are not recommended:
1. the use of well water, industrial water or water from cooling circuits and, in general, any potentially chemically or bacte-
riologically contaminated water;
2. the addition to the water of disinfectants or corrosion inhibiters, as these are potential irritants.
pH - 7 8.5
R, 20 °C - µS/cm 300 1250
cR- mg/l (*) (*)
R180
- mg/l (*) (*)
TH - mg/l CaCO3
150 400
- mg/l CaCO3
= 200
- mg/l Fe+ Mn = 0.2
- ppm Cl = 30
- mg/l SiO2= 20
- mg/l Cl- = 0.2
- mg/l CaSO4
= 100
pH - 7 8.5
R,20 °C
- µS/cm 125 500
cR- mg/l (*) (*)
R180
- mg/l (*) (*)
TH - mg/l CaCO3
0 200
- mg/l CaCO3
= 150
- mg/l Fe+Mn = 0.2
- ppm Cl = 20
- mg/l SiO2
= 20
- mg/l Cl- = 0.2
- mg/l CaSO4= 60
Limits
Min Max
Hydrogen ions
Specicconductivityat20°C
Total dissolved solids
Dryresidueat180°C
Total hardness
Temporary hardness
Iron+Manganese
Chlorides
Silica
Chlorineresidue
Calciumsulphate
Limits
Min Max
Hydrogen ions
Specicconductivityat20°C
Total dissolved solids
Dryresidueat180°C
Total hardness
Temporary hardness
Iron+Manganese
Chlorides
Silica
Chlorineresidue
Calciumsulphate
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Supply connection
4.2 Characteristics of the drain water
Inside the humidifier the water boils and is transformed into steam, without the addition of any substances.The drain water,
as a result, contains the same substances that are dissolved in the supply water, yet in greater quantities, depending on the
concentrationinthesupplywaterandthesetdrainingcycles,andmayreachtemperaturesof100°Candaninstantow-
rate of 5 l/min; not being toxic, it may be drained into the sewage system. The drain connection has an external diameter of
40 mm. As well as resisting high temperatures, the drain must guarantee the correct downflow of water, and as a result a
downwards slope of at least 5° is recommended.
4.3 Pipe connections
The installation of the humidifier requires connection to the water supply and drain pipes.
Fig. 4.3.1 Fig. 4.3.2
Units up to 15 kg/h steam production Units from 25 kg/h up to 65 kg/h steam production
WithreferencetoFig.4.3.1,4.3.2whichrepresentsthelowerviewofthebaseofthemachine,thesupplywatermaybe
connected using a rigid or flexible pipe with a minimum recommended internal diameter of 6 mm. This must be fitted with
a shut-off tap to allow the appliance to be disconnected during maintenance operations. To simplify the installation it is
recommendedtousethefastconnector3/4"G(K87247)orthe90°curvedconnector(K87243)ora90°copper-connector
(K87244)(availableonrequest).
A mechanical filter should be installed to trap any solid impurities; other types of filters are not recommended.
Thedrainwaterisconnectedusingasectionofrubberorplastictubingresistantto100°C,witharecommendedinternal
diameter of between 36 and 40 mm.
This section of pipe must be fastened using metal pipe clamps:
• above,totheoutletoftheappliance;
• below,ontotherigidpipe,soastocreateaminimumslopeof5°.
Supply connection
Drain connection
Drain connection
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© STULZ GmbH, Hamburg
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min. 5°
min. 5°
4.4 Diagram of water connections
Thedrainpipemustbefastenedtothehumidier(seeFig.4.4.1)usingaconnectingsleeveandtwometalpipeclamps,
not supplied.
Fig. 4.4.1
Fig. 4.4.2
IMPORTANT WARNING: The drain pipe must be free, without backpressure and with a drain trap immediately
downstream from the connection to the humidifier. We recommend to install an external anti-flooding device (not
supplied) to protect from faults of external hydraulic circuits.
4.5 Checks
The following conditions represent correct water connection:
• installationofashut-offtapinthesupplywaterline;
• presenceofamechanicallterinthesupplywaterline;
• watertemperatureandpressurewithintheallowedvalues;
• drainpiperesistanttotemperaturesof100°C;
• minimuminternaldiameterofthedrainpipeof36mm;
• minimumslopeofthedrainpipegreaterthanorequalto5°;
• electricallynon-conductivesleeve.
IMPORTANT WARNING: When installation is completed, flush the supply pipe for around 30 minutes by piping
the water directly into the drain without sending it into the humidifier. This will eliminate any scale or processing
residues that may block the fill valve or cause foam when boiling.
Watersupply
Tap
Filter
Drain
Possibledrain
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© STULZ GmbH, Hamburg
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A
B
C
D
E
F
G
A B C D E F G
>0.5 >5 2.1 >0.5 >0.5 >5 0.5
5 STEAM DISTRIBUTION
To achieve optimal humidifier efficiency, the steam produced must be introduced into the room uniformly, in order to prevent
the spraying of drops and notable condensation. This is best achieved using ventilated steam distributors or linear distribu-
tors. The right steam distributor must be chosen according to the place where the steam is to be introduced. If the steam is
to be distributed directly into the environment (rooms, warehouses, etc.), ventilated steam distributors (optional) fitted with
electric fans should be used. If, on the other hand, the steam is to be introduced into ducts or air handling systems, linear
distributors must be used, which exploit the speed of the air itself for distribution.
5.1 Direct steam distribution: ventilated steam distributors
Ventilated steam distributors, used to distribute the steam directly into the room, may be fitted on top of the humidifier
(seeFig.5.1.1)oralternativelypositionedseparatelyandconnectedtothehumidier(seeFig.5.1.2)usingasteamand
condensate drain pipe. The drawings show the minimum recommended distances to avoid the flow of humidified air from
coming into direct contact with persons, lights, electrical appliances, false ceilings and cold surfaces before the steam has
been totally absorbed by the environment.
Forfurtherdetailsontheassembly,theelectricalconnectionsandtheuseofventilatedsteamdistributors,pleasereferto
the specific instruction manual.
Fig. 5.1.1 Fig. 5.1.2
5.2 Steam distribution in cold rooms
Coldroomscanbehumidiedusingaventilatedsteamdistributor,makingsurethatthisoperateswithinitsoperatinglimits.
Thecellmusthaveoperatingtemperaturesofbetween-10°Cand+20°C,withapercentageofrelativehumidityofno
greaterthan80%rH.Iftheselimitsarenotpossible,thesteamcanbedistributedinthecoldroomusingalineardistributor.
In any case, the steam must not come into direct contact with flows of air cold from the refrigeration unit in the cold room,
to avoid possible condensation.
dimensions (m)
dimensions (m)
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A 22 30 40
B 10 10 10
Y 58 68 89
35 45 60
X 68 77 99
BY
X
A
X
°2
.
5.3 Steam distribution in ducts - linear and concentrated jet distributors (OEM)
Thehumidiermaybeusedforsmallductswithastaticpressureofnogreaterthan500Pa.Forsteamdistributionintoair
ducts,thesteamdistributormustbesizedaccordingtotheoutputofthehumidierandthecross-sectionoftheducting.For
thispurpose,STULZsuppliestworangesoflineardistributors:oneinaluminium,withplasticends.Figures5.3.1provide
the dimensions of the STULZ distributors, while table 5.3.1 specifies the minimum number and the model of the distributor
recommended for the type of humidifier used.
Tab. 5.3.1
N.B.: If the duct is not wide enough for the steam distributor, it is possible to split the steam hose to allow the usage of
multiple steam distributors (number in brackets).
*:“Y”kitavailablefordividingthesteamhose,with40mmdia.inletand2x30mmdia.outlets,(K87245)
**: “Y” kit available, 40 x 40 x 40, for spitting the steam hose
DP***D**R0 – linear distributors
Fig. 5.3.1
Fig. 5.3.2
fasten the support where envisaged
dimensions in mm
flange gasket
steam inlet
condensate drain
screws max. dia “M5”
L (see table 5.3.1)
hole in wall
Use the fastening support, supplied,
to ensure the 2° gradient due to the
shape of the flange.
humidifier fitting Ø mm
humidifier capacity
kg/h
code
distributor fitting mm
(øA)
max. distributor capacity
kg/h
length (L) mm
SEH001
SEH003
SEH005
SEH008
SEH010
SEH015
SEH025
SEH035
SEH045
SEH065
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© STULZ GmbH, Hamburg
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31,5
50 50
31,5
50
31,531,5
57,5
100
Y
Y
OEM12 Y = 22
OEM22 Y = 22
> 2
31,5
50 50
31,5
50
31,531,5
57,5
100
Y
Y
OEM12 Y = 22
OEM22 Y = 22
> 2
Thelineardistributorsaremounted(seeFig.5.3.3):
• makingaseriesofholesinthewalloftheductaccordingtothedrillingtemplateindicatedinFig.5.3.1or5.3.2;
• insertingthedistributorwiththesteamholesfacingupwards;
• fasteningtheangeofthedistributorusing4screws.
To allow the return of condensate using the drain connection (see par. 5.7), mount the distributor slightly inclined (at least
2°-3°seeFig.5.3.3)withtheinletconnectioncloserthantheclosedend,which,forthisreason,mustbeadequatelysup-
ported.
N.B.:The“L”fasteningsupport(code18C478A088)issoldtogetherwiththesteamdistributors,codeDP085-DP205.For
shorter lengths the support is sold as an optional.
Fig. 5.3.3
5.4 Concentrated jet steam distributor (OEM)
Forspecialapplications(e.g.steambaths,technologicalmachinery)aplasticOEMconcentratedjetdistributorisavailable,
withhole(12or22mm)orwithouthole,inthiscasemadebytheuseraccordingtospecicneeds(seeFig.5.4.1).The
OEMdistributormaybetted,horizontallyorverticallywiththeholefacingupwards,onasupportwiththesameholesas
indicated on the drilling template for the aluminium linear distributor.
N.B.: In the case of the steam tubing with an internal diamter of 30 mm, remove the 22 mm steam inlet section.
Fig. 5.4.1
5.5 Positioning the linear distributors in the air duct
As allowed by the dimensions of the air duct, the distributor must be as long as possible and located away from curves,
branches, changes in cross-section, grills, filters and fans. The minimum recommended distance between the steam dis-
tributor and the nearest obstacle is around from 1 to 1.5 metres, yet this greatly depends on the operating conditions; this
distance it in fact increases with:
• anincreaseintheairspeedinthechannel;
• anincreaseintherelativehumidityoftheairbeforeand,aboveall,afterhumidication;
• adecreaseinturbulence.
Followtheindicationsandthedistancesbetweenthedistributorandthewallsoftheductingand/orbetweentwodistribu-
tors, as indicated in the figures below (distances in mm).
Steam inlet
Steam inlet
Condensatedrain
Condensatedrain
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Fig. 5.5.1
5.6 Installation of the steam pipe
The humidifier must be connected to the distributor using a pipe suitable for this purpose, such as the STULZ flexible pipe.
The use of unsuitable tubing may cause weakening and cracking and consequently steam leaks. The layout of the pipe
must be such as to avoid the accumulation of condensate, with consequent noise (gurgling) and reduction in efficiency; the
pathofthepipemustexploitgravitytodrainthecondensedsteambacktotheboilerortothedistributor.Pocketsortraps
must thus be avoided, in that the condensate may be trapped; attention should also be paid to avoid choking the pipe due
tosharpbendsortwisting(seeFig.5.6.1).
Fig. 5.6.1
Using screw clamps, tightly fasten the end of
the pipe to the humidifier and steam distri-
butor fittings, so that they do not slide off due
to the effect of the temperature.
NO
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