Nordmann RC4 User manual

2549079 EN 1011
Nordmann RC4/DC4
MOUNTING INSTRUCTIONS
Electrode Humidifiers
NORDMANN
ENGINEERING
NORDMANN
ENGINEERING
Dampfluftbefeuchter econoVap

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Contents
1 Introduction 4
1.1 To the very beginning 4
1.2 Notes on the mounting instructions 4
2 For your safety 6
3 Product Overview 8
3.1 Models overview 8
3.2 Identicationoftheunit 8
3.3 Steamhumidierconstruction 9
3.4 Functionaldescription 11
3.5 Humidicationsystemoverview 12
3.6 Options 14
3.7 Accessories 14
3.7.1 Accessories overview 14
3.7.2 Accessorydetails 15
3.8 Standarddelivery 16
3.9 Storing/Transportation/Packaging 16
4 Notes for the planning engineer 17
4.1 Selecting the unit version 17
4.1.1 Selecting the unit 17
4.1.2 Calculatingthemaximumrequiredsteamcapacity 18
4.2 Selectingtheoptionsanaccessories 18
4.3 Selecting the control system 19
5 Mounting and installation work 21
5.1 Importantnotesformountingandinstallationwork 21
5.2 Mounting the unit 22
5.2.1 Notesonlocatingandmountingtheunit 22
5.2.2 Mountingthehumidier 24
5.2.3 Inspectingtheinstalledunit 25
5.3 Steaminstallation 26
5.3.1 Overviewsteaminstallation 26
5.3.2 Positioningandmountingofthesteamdistributionpipe 27
5.3.3 Installingthesteamdistributors 29
5.3.4 Installingthesteamhose 30
5.3.5 Installingthecondensatehose 31
5.3.6 Inspectingthesteaminstallation 32
5.4 Waterinstallation 33
5.4.1 Overviewwaterinstallation 33
5.4.2 Notesonwaterinstallation 33
5.4.3 Inspectingthewaterinstallation 34
5.5 Electricinstallation 35
5.5.1 WiringdiagramNordmannRC4/DC4 35
5.5.2 Notesonelectricinstallation 36
5.5.3 InsertingtheCFcard 38
5.5.4 Inspectingtheelectricalinstallation 38
6 Productspecications 39
6.1 Technicaldata 39
6.2 Unit dimensions 40
6.3 Declarationofconformity 41

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Limitation
ThesubjectofthesemountinginstructionsisthesteamhumidierNordmannRC4/DC4 in
its different versions. The various accessories are only describedinsofar as this is necessary
forproperoperationoftheequipment.Furtherinformationonaccessoriescanbeobtainedinthe
respectiveinstructions.
These mounting instructions is restricted to the installation ofthesteamhumidierNordmannRC4/
DC4andismeantforwelltrainedpersonnelbeingsufcientlyqualiedfortheirrespective
work.
Themountinginstructionsaresupplementedbyvariousseparateitemsofdocumentation(operating
instructions,sparepartslist,manualsforaccessories,etc.).Wherenecessary,appropriatecross-
referencesaremadetothesepublicationsinthemountinginstructions.
1 Introduction
WethankyouforhavingpurchasedthesteamhumidierNordmannRC4/DC4.
ThesteamhumidierNordmannRC4/DC4incorporatesthelatesttechnicaladvancesandmeetsall
recognizedsafetystandards.Nevertheless,improperuseoftheNordmannRC4/DC4mayresultin
dangertotheuserorthirdpartiesand/orimpairmentofmaterialassets.
Toensureasafe,proper,andeconomicaloperationofthesteamhumidierNordmannRC4/DC4,
please observe and comply with all information and safety instructions contained in the present
manualaswellastheinstructionsgiveninthemanualsforthecomponentsusedinthehumidica-
tion system.
Ifyouhavequestions,whicharenotorinsufcientlyansweredinthisdocumentation,pleasecontact
yourNordmannsupplier.Theywillbegladtoassistyou.
1.2 Notes on the mounting instructions
1.1 To the very beginning

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Symbols used in this manual
CAUTION!
Thecatchword“CAUTION”designatesnotesinthisdocumentationthat,ifneglected,maycause
damage and/or malfunction of the unit or other material assets.
WARNING!
Thecatchword“WARNING”usedinconjunctionwiththegeneralcautionsymboldesignatessafety
anddangernotesinthisdocumentationthat,ifneglected,maycausetoinjury to persons.
DANGER!
Thecatchword“DANGER”usedinconjunctionwiththegeneralcautionsymboldesignatessafety
anddangernotesin this documentation that, ifneglected,mayleadtosevere injury or even
death of persons.
Safekeeping
Pleasesafeguardthesemountinginstructionsinasafeplace,whereitcanbeimmediatelyaccessed.
Iftheequipmentchangeshands,thedocumentationshouldbepassedontothenewoperator.
Ifthedocumentationgetsmislaid,pleasecontactyourNordmannsupplier.
Language versions
Thesemountinginstructionsisavailableinvariouslanguages.PleasecontactyourNordmannsup-
plierforinformation.
Copyright protection
ThepresentmountinginstructionsareprotectedundertheCopyrightAct.Passing-onandreproduc-
tionofthemanual(orpartthereof)aswellasexploitationandcommunicationofthecontentsare
prohibitedwithoutwrittenpermissionbythemanufacturer.Violationofcopyrighttermsissubjectto
legalprosecutionandarisesliabilityforindemnication.
Themanufacturerreservestherighttofullyexploitcommercialpatentrights.

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2 For your safety
General
EverypersonworkingwiththeNordmannRC4/DC4musthavereadandunderstoodthemounting
instructionsbeforecarryingoutanyinstallationwork.
Knowingandunderstandingthecontentsofthemountinginstructionsis a basic requirement for
protectingthepersonnelagainstanykindofdanger,topreventfaultyinstallation,andtoinstalland
operatetheunitsafelyandcorrectly.
All ideograms, signs and markings applied to the unit must be observed and kept in readable
state.
Qualicationofpersonnel
Allactionsdescribedinthepresentmountinginstructionsmustbecarriedoutonlybywell trained
andsufcientlyqualiedpersonnelauthorisedbytheowner.
Forsafetyandwarrantyreasonsanyactionbeyondthescopeofthismanualsmustbecarriedout
onlybyqualiedpersonnelauthorisedbythemanufacturer.
ItisassumedthatallpersonsworkingwiththeNordmannRC4/DC4arefamiliarandcomplywiththe
appropriateregulationsonworksafetyandthepreventionofaccidents.
Intended use
ThesteamhumidierNordmannRC4/DC4isintendedexclusivelyforairhumidicationviaasteam
distributor approved by the manufacturer(unitversionsNordmann DC4)or via the integrated
ventilation unit(unitversionsNordmann RC4)withinthespeciedoperatingconditions(see
chapter6“Productspecications”).Anyothertypeofapplicationwithouttheexpresswrittenconsent
ofthemanufacturerisconsideredasnotconformingwiththeintendedpurposeandmayleadtothe
NordmannRC4/DC4becomingdangerous.
Operationoftheequipmentintheintendedmannerrequiresthat all the information in these in-
structions is observed (in particular the safety instructions).
Danger that may arise from the unit:
The Nordmann RC4/DC4 is mains powered.
DANGER!
One may get in touch with live parts when the unit is open. Touching live parts may cause
severe injury or danger to life.
Prevention:Thesteamhumidiermustbeconnectedtothemainsonlyafterallmountingand
installationworkhasbeencompletedandthecoverhasbeenrelocatedproperly.

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Behaviour in case of danger
AllpersonsworkingwiththeNordmannRC4/DC4areobligedtoreportanyalterationstotheunit
thatmayaffectsafetytotheownerwithoutdelayandtosecuresuchaunitagainstaccidentalpower-
up.
Prohibitedmodicationstotheunit
NomodicationsmustbeundertakenontheNordmannRC4/DC4withouttheexpresswritten
consentofthemanufacturer.
Forthereplacementofdefectivecomponentsuseexclusivelyoriginal accessories and spare parts
availablefromyourNordmannsupplier.

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3 Product Overview
3.1 Models overview
Steam air humidiers Nordmann RC4/DC4 are available in the two basic versions for duct air
humidicationanddirectroomairhumidication with different heating voltagesandsteam
capacities of 2 kg/h and 4 kg/h.
Model Nordmann
Duct Room
DC4 RC4
Max.steamcapacity 2kg/h 4kg/h 2kg/h 4kg/h
Heatingvoltages 230V1~/50..60Hz
240V1~/50..60Hz
200V2~/50..60Hz
Integratedventilationunit ––– X
Displayandcontrolunit X
ExternalOn/Offcontrol X
ExternalP/PIcontrol X
InternalP/PIcontroller X
Admissiblecontrolsignals 0–5V,1–5V,0–10V,2–10V,
0–16V,3.2–16V,0–20mA,4–20mA
Operatingparameter congurableviacontrolsoftware
3.2 Identicationoftheunit
Theidenticationoftheunitisfoundonthetypeplate(forthelocationofthetypeplateseeunit
overview):
Typedesignation Serialnumber Month/Year
Heatingvoltage
Maximumsteamcapacityperunit
Admissiblewatersupplypressure
Powerconsumption
Controlvoltage
Fieldwithcerticationsymbols
Walter Meier (Climate International) Ltd. 8808 Pfäfkon
Type: Nordmann DC4 Ser.Nr.: XXXXXXX 06.09
Heating Voltage: 230V / 1~ / 50...60Hz Power: 3.1 kW / 13.5 A
Steam Capacity: 4.0 kg/h Ctrl.Voltage: 230V / 1~ / 50...60Hz
Water Pressure: 1...10 bar
Made in Switzerland

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3.3 Steamhumidierconstruction
 1 Backpanel
 2 Watercup
 3 Watersupplyhose
 4 Heatingelectrodes
5 Filling hose
 6 Overowhose
 7 Steamcylinder
 8 Inletvalve(notvisible)
 9 Drainpump
10 Waterdrainconnector(notvisible)
11 Watersupplyconnector(notvisible)
12 Tub
13 Powerboard
14 Typeplate
15 Remoteoperatingandfaultindicationboard
(Option)
16 ControlboardwithCFcard
17 Unit switch
18 Drainkey
19 Displayandcontrolunit
20 Operationstatusindicators(LED's)
21 Intermediatepanel
22 Front cover
23 Levelsensor
24 Steamoutletconnector
Construction Nordmann DC4
1
2
4
5
7
6
9
3
17 13 1214 101516
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22
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24
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Construction Nordmann RC4
 1 Backpanel
 2 Watercup
 3 Watersupplyhose
 4 Heatingelectrodes
5 Filling hose
 6 Overowhose
 7 Steamcylinder
 8 Inletvalve(notvisible)
 9 Drainpump
10 Waterdrainconnector(notvisible)
11 Watersupplyconnector(notvisible)
12 Tub
13 Powerboard
14 Typeplate
15 Remoteoperatingandfaultindicationboard
(Option)
16 ControlboardwithCFcard
17 Unit switch
18 Drainkey
19 Displayandcontrolunit
20 Operationstatusindicators(LED's)
21 Unitintermediatepanel
22 Front cover
23 Levelsensor
24 Condensatehose
25 Ventilationunit
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2
4
5
7
6
9
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17 13 1214 101516
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3.4 Functional description
ThesteamhumidierNordmannRC4/DC4isapressurelesssteamgeneratorthatutilizesanelec-
trodeheating.ThesteamhumidierNordmannRC4/DC4isdesignedforairhumidicationviaa
steamdistributor(unitversionsNordmannDC4)orviatheintegratedventilationunit(unitversions
NordmannRC4).
Steam generation
Anytimesteamisrequested,theelectrodesaresuppliedwithvoltage.Simultaneously,theinletvalve
opensandwaterentersthesteamcylinderfromthebottomviawatercupandsupplyline.Assoon
astheelectrodescomeincontactwiththewater,currentbeginstoowbetweentheelectrodes,
eventuallyheatingandevaporatingthewater.Themoretheelectrodesurfaceisexposedtowater,
thehigheristhecurrentconsumptionandthusthesteamcapacity.
Uponreachingtherequestedsteamcapacity,theinletvalvecloses. If the steam generation de-
creasesbelowacertainpercentageoftherequiredcapacity,duetoloweringofthewaterlevel(e.g.
becauseoftheevaporationprocessordrainage),theinletvalveopensuntiltherequiredcapacity
isavailableagain.
Iftherequiredsteamcapacityislowerthantheactualoutput,theinletvalveiscloseduntilthedesired
capacityisachievedbyloweringofthewaterlevel(evaporationprocess).
Level monitoring
Asensorprovidedinthesteamcylindercoverdetectswhenthewaterlevelgetstoohigh.Themo-
mentthesensorcomesincontactwithwater,theinletvalvecloses.
Drainage
Asaresultoftheevaporationprocess,theconductivityofthewaterincreasesduetoanescalating
mineralconcentration.Eventually,aninadmissiblyhighcurrentconsumptionwouldtakeplaceifthis
concentrationprocesswerepermittedtocontinue.Topreventthisconcentrationfromreachinga
value,unsuitablyhighfortheoperation,acertainamountofwaterisperiodicallydrainedfromthe
cylinderandreplacedbyfreshwater.
Control
Thesteamproductioncanbecontrolledsteplesslyviatheinternaloranexternalcontinuouscontroller
orwithanOn/Offcontrolviaanexternalhumidistat.

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3.5 Humidicationsystemoverview
 1 Steamhumidier
 2 Steamconnector
 3 Watersupplyconnector
 4 Waterdrainconnector
 5 Filtervalve(accessory“Z261”)
 6 Manometer(installationrecommended)
 7 Funnelwithsiphon(buildingside)
 8 Waterdrainhose(accessory“DS22”)
 9 Connectingcables
10 Steamhose(accessory“DS22”)
11 Condensatehose(accessory“KS10”)
12 Steamdistributionpipe(accessory“41-...”)
13 Steamnozzle(accessory“W21”)
System overview Nordmann DC4
DS22
7
–
–
–
–
–
+
–
1
2
4
Z261
9
10
41-..
11
DS22
KS10
KS10
11
12
41-.. 12
W21
13
W21
13
8
3
6
5
125...1250µS/cm
1...10 bar
1...40 °C
min. 10 %
min. 10 %
≥ 40 mm
min. 50 cm
ø22 mm
G 3/4"
G 3/8"
ø10/8 mm
min. 300 mm
min. 20 %
min. 10 %
min. 10 %
min. 5 %
min. 5 %
Rmin. 300 mm
Rmin. 300 mm
Ømin. 200 mm
Ømin. 200 mm
Pmax. 800 Pa
Pmin. -800 Pa
Pmax. 800 Pa
Pmin. -800 Pa

13
System overview Nordmann RC4
 1 Steamhumidier
 2 Ventilationunit
 3 Watersupplyconnector
 4 Waterdrainconnector
 5 Filtervalve(accessory“Z261”)
 6 Manometer(installationrecommended)
 7 Funnelwithsiphon(buildingside)
 8 Waterdrainhose(accessory“DS22”)
 9 Connectingcables
–
–
DS22
8
7
1
2
3
4
6
Z261
9
5
125...1250µS/cm
1...10 bar
1...40 °C
min. 10 %
min. 10 %
≥ 40 mm
min. 50 cm
ø22 mm
G 3/4"
G 3/8"
ø10/8 mm

14
3.6 Options
Nordmann
DC4 RC4
Cable glands set with counter nuts
–1xM20forcablediametersfrom7.0to13.0mm
–1xM16forcablediametersfrom4.5to10.0mm
–1xM12forcablediametersfrom2.5to6.5mm
1x CG
Radio humidity sensor
Radiohumiditysensorsetconsistingofradiohumiditysensorandreceiver
boardforthehumiditycontrolviatheinternalP/PIhumiditycontroller.The
maximumrangeoftheradiohumiditysensorinanopenroomis25m
Note:theradiohumiditysensoraswellasthereceiverboardmustbe
installedandconguredonlybyaservicetechnicianofyourNordmann
representative.
1x RH
Water drain hose
Water drain hose to lead the drain line through the back panel of the
unit.
1x WDH
Remote operating and fault indication
PCBwithrelaycontactsfortheconnectionofremotedisplaysfor“Opera-
tion”,“Steam”,“Fault”and“Service”.
1x RFI
3.7 Accessories
3.7.1 Accessories overview
Accessories for water installation
Nordmann
DC4 RC4
Filter valve 1x Z261
Accessories for steam installation
Nordmann
DC4 RC4
Steam nozzle
(Detailsseechapter3.7.2.1)
1x W21 –––
Steam distribution pipe
(Detailsseechapter3.7.2.2)
1x 41-... –––
Steam hose / meter 1x DS22 –––
Condensate hose / meter 1x KS10 –––
Accessories for humidity control
Nordmann
DC4 RC4
Humidity sensor for duct installation EGH110 –––
Humidity sensor for room installation ––– EGH130
Duct humidistat HBC –––
Room humidistat ––– HSC

15
3.7.2 Accessory details
3.7.2.1 Steam nozzle W21
The steam nozzle W21canbemountedintheventilationduct
horizontallyorvertically.Keepaminimum distance clearance (A)
of 200 mmbetweennozzleopeningandtheoppositeductwall.
3.7.2.2 Steam distribution pipe 41-...
Thesteamdistributionpipesareselectedonthebasisoftheduct width(forhorizontalinstallation)
or the duct height(forverticalinstallation)andthecapacityofthesteamhumidier.
Important! Alwaysselectthelongestpossiblesteamdistributionpipe(optimumhumidicationdis-
tance).
Steam distribution pipes
Type 41-... 1)
Length (L) steam
distribution pipe
in mm 2)
Duct width (B)
in mm
41-200 200 210...400
41-350 350 400...600
41-500 500 550...750
41-650 650 700...900
41-800 800 900...1100
41-1000 1000 1100...1300
41-1200 1200 1300...1600
1) Material:CrNisteel
2) speciallengthonrequest

16
3.8 Standard delivery
Thestandarddeliveryincludes:
– SteamhumidierNordmannRC4/DC4equippedwiththeoptionsorderedaccordingtochapter
3.6, xing set, mounting instructions (this document) and operating instructions, packaged in
cardboardbox(WxHxD:351mmx729mmx265mm,shippingweight:7.4kg)
– Orderedaccessorieswithoperatinginstructionsaccordingchapter3.7,packedseparately
– Sparepartslist
3.9 Storing/Transportation/Packaging
Storing
Storetheunitinaprotectedareameetingthefollowingrequirements:
– Roomtemperature:1...40°C
– Room humidity: 10 ... 75 %rh
Transportation
Foroptimumprotectionalwaystransporttheunitintheoriginalpackaging.Alwaysplacetheuniton
itsbackside.
Packaging
KeeptheoriginalpackagingoftheNordmannRC4/DC4forlateruse.
Incaseyouwishtodisposeofthepackaging,observethelocalregulationsonwastedisposal.Never
disposeofthepackagingtotheenvironment.

17
4.1 Selecting the unit version
4 Notes for the planning engineer
Toselecttheunitversionthefollowingstepsarerequired:
1. Selectingtheunitversionfromthetableinchapter4.1.1
2. Calculatingtherequiredmaximumsteamcapacityaccordingchapter4.1.2
4.1.1 Selecting the unit
Model Nordmann
Duct Room
DC4 1) RC4 2)
Heatingvoltages 230V1 230V1~/50..60Hz
240V1 240V1~/50..60Hz
200V2 200V2~/50..60Hz
Max.steamcapacity 2kg/h 4kg/h 2kg/h 4kg/h
Integratedventilationunit ––– X
Displayandcontrolunit X
ExternalOn/Offcontrol X
ExternalP/PIcontrol X
InternalP/PIcontroller X
Admissiblecontrolsignals 0–5V,1–5V,0–10V,2–10V,
0–16V,3.2–16V,0–20mA,4–20mA
Operatingparameter congurableviacontrolsoftware
1) Airconditioningsystemswithsupplyairportionupto66%
2) fordirectroomhumidication
Nordmann DC4 S4 230V1

18
4.2 Selecting the options an accessories
Forselectingtheoptionsandaccessoriesseechapter3.6and3.7.
Themaximumrequiredsteamcapacitymustbecalculatedbasedononeofthefollowingformulas:
 V•ρ 
mD=  •(x2- x1)
1000
or
V
mD=  •(x2- x1)
 1000•ε
mD: maximumsteamdemandinkg/h
V: volumeofsupplyairportionperhourinm3/h(forindirectroomhumidication)orroomvolume
tobehumidiedperhourinm3/h(fordirectroomhumidication)
ρ: specicgravityofairinkg/m3
ε: specicvolumeofairinm3/kg
x2: desiredabsoluteroomairhumiditying/kg
x1: minimumabsolutesupplyairhumidityin g/kg
Thevaluesforρ,ε,x2and x1canbegatheredfromtheh,x-diagram or the Carrier-Diagramfor
moistairrespectively.
Important notes:
– Therequiredmaximumsteamcapacitydependsonthespecicapplicationandtheinstallation.
Thecalculatedsteamcapacitybasedontheaboveformulas,theh,xdiagramandtheconditionof
theairtobehumidieddoesnotconsideranysteamloss(e.g.duetocondensationinthesteam
hosesandthesteamdistributors),anyheatlossoftheunitaswellasanyabsorptionorrelease
ofhumidityofmaterialslocatedintheroombeinghumidied.
Inaddition,thecalculatedsteamcapacitydoesnotconsideranylossescausedbythedraining
ratedependingonthewaterqualityaswellasanylossesoccurifthesteamhumidierisoperated
onamainscircuitwithagroundfaultcircuitinterrupter.
Thetotalamountoflossesdependsontheentiresystemandmustbetakenintoconsideration
whencalculatingtherequiredsteamcapacity.Ifyouhaveanyquestionsregardingthecalculation
ofthesteamcapacitypleasecontactyourNordmannsupplier.
– Forsystemswherethemax.requiredsteamcapacityvariesextensively(e.g.fortestfacilitiesor
forsystemswithvariableairvolumeow,etc.),pleasecontactyourNordmannsupplier.
4.1.2 Calculatingthemaximumrequiredsteamcapacity
Nordmann DC4 S4230V1

19
Nordmann
DC4
4.3 Selecting the control system
ThesteamhumidiersNordmannRC4/DC4aredesignedtobecontrolledwithOn/Offcontrolviaan
externalhumidistatorwithcontinuouscontrolviaanexternalP/PIhumiditycontrollerortheinternal
P/PIhumiditycontroller.
– System 1: Room humidity control
System1issuitedfordirectroomhumidicationandair conditioning systems with mainly
recirculated air.Thehumiditysensororhumidistatrespectivelyispreferablylocatedintheroom
itselforintheexhaustairduct.
A1 humidity sensor
B1 ventilationinterlock
B2 airowmonitor
B3 safetyhumidistat
B4 humidistat
PII internalP/PIcontroller
PIE externalcontinuouscontroller
 (e.g.PIcontroller)
Y inputsignalfromA1
Nordmann
RC4
A1 humidity sensor
B1 ventilationinterlock
B2 airowmonitor
B3 safetyhumidistat
B4 humidistat
PII internalP/PIcontroller
PIE externalcontinuouscontroller
 (e.g.PIcontroller)
Y inputsignalfromA1

20
– System 2: Room humidity control with continuous limitation of the supply air humidity
System2issuitedforairconditioningsystemswithalarge portion of supply air, low supply air
temperature, post-humidication, or variableairowvolume.Ifthesupplyairhumidityexceeds
thepresetvalue,thecontinuouslimitationiseffectedpriortotheroomhumiditycontrol.
Thehumiditysensor(A1)ispreferablylocatedintheexhaustairductorintheroomitself.The
humiditysensor(A2)forthelimitationofthesupplyairhumidityislocatedinthesupplyairduct
afterthesteamdistributionpipe.Thiscontrolsystemrequiresacontinuouscontrollerwiththe
optiontoconnectasecondhumiditysensor.
Attention! Thecontinuouslimitationofthesupplyairhumidityisnosubstituteforthesafetyhumi-
distat.
Nordmann
DC4
Nordmann
RC4
A1/2 humidity sensor
B1 ventilationinterlock
B2 airowmonitor
B3 safetyhumidistat
PII InternalP/PIcontroller
PIE Externalcontinuouscontroller
 (e.g.PIcontroller)
Y inputsignalfromA1
Z inputsignalfromA2
A1/2 humidity sensor
B1 ventilationinterlock
B2 airowmonitor
B3 safetyhumidistat
PII InternalP/PIcontroller
PIE Externalcontinuouscontroller
 (e.g.PIcontroller)
Y inputsignalfromA1
Z inputsignalfromA2
Please contact your Nordmann supplier, if your application meets the following conditions:
– Humidicationofsmallroomsupto200m3
– Airconditioningsystemswithahighnumberofairexchanges
– Systemswithvariableairvolumeow
– Testfacilitieswithextremecontrolaccuracyrequirements
– Roomswithahighvariationinmax.steamcapacity
– Systemswithtemperatureuctuations
– Coldroomsandsystemswithdehumidication