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:
• DANGEROFELECTRICSHOCK
The humidifier contains live electrical components. Disconnect the mains power supply before accessing inside parts
or during maintenance and installation.
• DANGEROFWATERLEAKS
The humidifier automatically and constantly fills/drains certain quantities of water. Malfunctions in the connections or in
the humidifier may cause leaks.
• DANGEROFBURNS
 Thehumidiercontainshightemperaturecomponentsanddeliverssteamat100°C/212°F
• Theenvironmentalandpowersupplyconditionsmustconformtothevaluesspeciedontheproductratinglabels.
• Theproductisdesignedexclusivelytohumidifyroomseitherdirectlyorthroughdistributionsystems(ducts).
• Onlyqualiedpersonnelwhoareawareofthenecessaryprecautionsandabletoperformtherequiredoperationscor-
rectly may install, operate or carry out technical service on the product.
• Onlywaterwiththecharacteristicsindicatedinthismanualmustbeusedforsteamproduction.
• Alloperationsontheproductmustbecarriedoutaccordingtotheinstructionsprovidedinthismanualandonthelabels
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.
• Donotattempttoopenthehumidierinwaysotherthanthosespeciedinthemanual.
• Observethestandardsinforceintheplacewherethehumidierisinstalled.
• Keepthehumidieroutofthereachofchildrenandanimals.
• Donotinstallandusetheproductnearobjectsthatmaybedamagedwhenincontactwithwater(orcondensate).
STULZ declines all liability for direct or indirect damage following water leaks from the humidifier.

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• Donotusecorrosivechemicals,solventsoraggressivedetergentstocleantheinsideandoutsidepartsofthehumidi-
er,unlessspecicallyindicatedintheusermanual.
• Donotdrop,hitorshakethehumidier,astheinsidepartsandtheliningsmaybeirreparablydamaged.
STULZadoptsapolicyofcontinualdevelopment.Consequently,STULZreservestherighttomakechangesandimprove-
mentstoanyproductdescribedinthisdocumentwithoutpriorwarning.
Thetechnicalspecicationsshowninthemanualmaybechangedwithoutpriorwarning.
TheliabilityofSTULZinrelationtoitsproductsisspeciedin theSTULZgeneralcontractconditions,availableonthe
websitewww.stulz.comand/orbyspecicagreementswithcustomers;specically,totheextentwhereallowedbyapplica-
blelegislation,innocasewillSTULZ,itsemployeesorsubsidiariesbeliableforanylostearningsorsales,lossesofdata
andinformation,costsofreplacementgoodsorservices,damagetothingsorpeople,downtimeoranydirect,indirect,
incidental, actual, punitive, exemplary, special or consequential damage of any kind whatsoever, whether contractual,
extra-contractualorduetonegligence,oranyotherliabilitiesderivingfromtheinstallation,useorimpossibilitytousethe
product,evenifSTULZoritssubsidiariesarewarnedofthepossibilityofsuchdamage.

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INDEX
1 MODELSANDDESCRIPTIONOFTHECOMPONENTS ...................................................................... 6
1.1 Models .......................................................................................................................................... 6
1.2 Description of the components ..................................................................................................... 7
1.3 Description of the water bearing components............................................................................... 8
2 CONTROL-ANDOPERATINGPRINCIPLE ........................................................................................... 9
2.1 Operatingprinciple ........................................................................................................................ 9
2.2 Controlprinciples .......................................................................................................................... 9
3 MOUNTING ........................................................................................................................................ 12
3.1 Receiptandstorage .................................................................................................................... 12
3.2 Positioning................................................................................................................................... 12
3.3 Fastening..................................................................................................................................... 12
3.4 Removalandreassemblyofthefrontcover ................................................................................ 13
4 WATERCONNECTIONS ...................................................................................................................... 14
4.1 Characteristicsofthesupplywater ............................................................................................. 14
4.2 Characteristicsofthedrainwater................................................................................................ 15
4.3 Pipeconnections......................................................................................................................... 15
4.4 Diagram of water connections..................................................................................................... 16
4.5 Checks........................................................................................................................................ 16
5 STEAMDISTRIBUTION........................................................................................................................ 17
5.1 Direct steam distribution: ventilated steam distributors ............................................................... 17
5.2 Steam distribution in cold rooms ................................................................................................. 17
5.3 Steamdistributioninducts-linearandconcentratedjetdistributors(OEM) .............................. 18
5.4 Concentratedjetsteamdistributor(OEM)................................................................................... 19
5.5 Positioningthelineardistributorsintheairduct.......................................................................... 19
5.6 Installation of the steam pipe ...................................................................................................... 20
5.7 Installation of the condensate return pipe ................................................................................... 21
5.8 Checks........................................................................................................................................ 21
6 ELECTRICALCONNECTIONS............................................................................................................. 22
6.1 Powersupplyvoltage .................................................................................................................. 22
6.2 Checkingthevoltageoftheauxiliarycircuittransformer............................................................. 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,CONTROLANDSHUT-DOWN ........................................................................................... 32
7.1 Preliminarychecks ....................................................................................................................... 32
7.2 Starting the unit............................................................................................................................ 33
7.3 The humidifier controller............................................................................................................... 34
7.4 Shut-down .................................................................................................................................... 36

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8 CONTROLLERHPARAMETERS ......................................................................................................... 36
8.1 Readingandsettingtheambienthumiditysetpoint ................................................................... 37
8.2 Readingandsettingthecontrolparameters–
reading the measurements ......................................................................................................... 37
8.3 Readingandsettingthecongurationparameters...................................................................... 38
8.4 Validity of the modifications to the parameters............................................................................ 42
8.5 Recallingthedefaultparameters(factorysettings) ..................................................................... 43
8.6 Resettingthehourcounter.......................................................................................................... 43
8.7 Displaying and modifying the unit of measure of the parameters ............................................... 43
9 THEREMOTECONTROL(optional)..................................................................................................... 44
9.1 Description of the remote control ................................................................................................ 44
9.2 Programmingfromtheremotecontrol......................................................................................... 45
9.3 Exiting the programming phase................................................................................................... 46
10MAINTENANCEANDSPAREPARTS .................................................................................................. 47
10.1 Replacingthecylinder................................................................................................................. 47
10.2 Maintenance of the other plumbing components ........................................................................ 48
10.3 Componentreplacement............................................................................................................. 49
10.4 Spare parts.................................................................................................................................. 50
11ALARMS,TROUBLESHOOTING .......................................................................................................... 53
11.1 Alarms ........................................................................................................................................ 53
11.2 Table of alarms and signals......................................................................................................... 54
11.3 Troubleshooting table .................................................................................................................. 56
12 SETTINGTHEALARMTHRESHOLDSANDOTHERFUNCTIONS .................................................... 57
12.1 Setting the alarm thresholds ....................................................................................................... 57
12.2 Otherfunctions............................................................................................................................ 58
13TECHNICALSPECIFICATIONS............................................................................................................ 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:
•ratedsteamcapacity15kg/h(015);
•3electricphases(3);
•internalcontroler(H);
•supplyvoltage400VAC(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.
13
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-OFFswitch/
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-OFFswitch/
manual drain switch
main board
controller

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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
16
15
14
6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
16
15
14
6
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
ForthedescriptionofFig.1.3.1.1and1.3.2.1,refertothefollowingtable:
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
15
14
6
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.
Thequantityofcurrentthatinitiallyowsdependsgreatlyonthetypeofwatersuppliedfromthemains.Normally,arecent-
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:humidierproducessteamifalsotheremoteON/OFFcontactisclosedtoo.
• open:steamproductionisstoppedwhenthecurrentevaporationcycleends(itmaytakemaximum10-15minsincecon-
tactopens).Notethatwhentheremoteon/offcontactopens,steamproductionisimmediatelystopped,regardlessthe
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,4to20mA;fortypePcontrollers,thesignalis0to10Vdcandcannotbemodied.TheentirerangeiscalledtheBP
(proportional band).
Themaximumproduction,Pmax,correspondingto5%lessthanthemaximumvalueoftheexternalsignalY,canbepro-
grammed(typeHcontrollersonly)between20%and100%oftheratedvalueofthehumidier(parameterP0).
Theminimumproduction,Pminissetat20%oftheratedvalue,withtheactivationhysteresis,valuehy,equalto2%forP
controllersandequal5%forHcontrollersoftheentireBPoftheexternalsignalY.
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