Condair GS OC Series Guide

Gasfired steam humidifier - outdoor version
2511510 EN 1204
Condair GS…OC C series
INSTALLATION, COMMISSIONING AND
SERVICE INSTRUCTIONS

3
Contents
1 Introduction 4
1.1 At the very beginning 4
1.2 Notes on the installation, commissioning and service instructions 4
2 For your safety 5
3 Product Overview 8
3.1 Product versions/Model designations 8
3.2 Delivery 8
3.3 Humidicationsystemoverview 9
3.4 Constructionofthegasredsteamhumidier 10
3.5 Principle of operation 11
4 Basic planning 13
4.1 Selecting the unit 13
4.2 Selecting the control system 15
4.3 Options 17
4.4 Accessories 17
5 Mounting and installation works 19
5.1 Safetyinstructionsformountingandinstallationworks 19
5.2 Unittting 19
5.3 Steam installation 23
5.4 Waterinstallation 30
5.5 Gas installation 33
5.6 Flue gas installation 36
5.7 Installation of control and monitoring devices 38
5.8 ElectricalInstallation 39
6 Inspecting the installations (Check list) 42
7 Operation 44
7.1 Safety instructions for operation 44
7.2 Function of the display and operating elements 45
7.3 Commissioning and notes on operation 46
7.4 Takingoutofoperation 48
8 Maintenance 49
8.1 Maintenanceinstructions 49
8.2 Dismantlingworkformaintenanceandthereplacement
of components 51
8.3 Notes on cleaning agents 62
8.4 Resetting the maintenance reminder 62
9 Troubleshooting 63
9.1 Importantnotesontroubleshooting 63
9.2 Errorindication 63
9.3 Resettingtheerrorindication 63
9.4 Replacingthebackupbatteryonthecontrolboardofthe
Condair GS...OC 64
10 Taking out of service/Disposal 65
10.1 Takingoutofservice 65
10.2 Disposal/Recycling 65
11 Specications 66
11.1 Technical Data 66
11.2 Fluegasspecications 67

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1 Introduction
1.1 At the very beginning
Thankyoufordecidingontheoutdoor version of the Condair GS...OC C seriesgasredsteam
humidier(abbreviated as “Condair GS...OC”).
TheCondairGS...OCincorporatesthelatesttechnicaladvancesandsatisestherequirementsofthe
EuropeanGasEquipmentDirective(90/396/EEC)andallknownsafetystandards.Nevertheless,
improper use may result in danger to the user or third parties and/or impairment of the installation or
other material assets.
To ensure a safe,proper,andeconomicaloperation of the Condair GS...OC, please observe and
complywithallinformationandsafetyinstructionscontainedinthepresentinstallation,com-
missioningandserviceinstructions.
Ifyouhavequestions,whicharenotorinsufcientlyansweredinthisdocumentation,pleasecontact
yourCondairsupplier.Theywillbegladtoassistyou.
1.2 Notes on the installation,commissioningandserviceinstructions
The subject of these installation, commissioning and service instructions is the gasredsteamhumidier
Condair GS...OC C series in its different versions. The various accessories (steam distribution pipes,
waterlter,etc.)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 installation, commissioning and service instructions are restricted to:
– the planningofahumidifyingsystemthatistobeequippedwithagasredsteamhumidierCond
air GS...OC.
– the installation,commissioning,operation and servicing ofthegasredsteamhumidierCondair
GS...OC.
These installation, commissioning and service instructions are supplemented by various separate
itemsofdocumentation(systemdrawings,technicalspecications,etc.).Wherenecessary,appropri
atecrossreferencesaremadetothesepublicationsin thepresentinstallation, commissioning and
service instructions.
Note: Under certain circumstances your installation may differ from the data in this documentation. In
thiscase,pleasemakecontactwithyourlocalCondairrepresentative.
Conventions
Thissymboldrawsattentiontosafety instructions and warnings of potential danger
which,ifunheeded,couldresultininjurytopersonsand/ordamagetoproperty.
Safekeeping
Please safeguard these installation, commissioning and service 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Condairsupplier.
Language versions
These installation, commissioning and service instructions are available in various languages. Please
contact your Condair supplier for information.

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2 For your safety
Intended use
GasredsteamhumidiersCondair GS...OCareintendedexclusivelyforhumidica-
tioninventilationsystemswithinthespeciedoperatingconditions. Any other type
ofapplication,withoutthewrittenconsentofyourCondairsupplier,isconsideredasnot
conformingwiththeintendedpurpose.Themanufacturer/suppliercannotbemadeliable
for any damages resulting from improper use. The user bears full responsibility.
Operationoftheequipmentintheintendedmannerrequiresthatalltheinformationin
these instructions is observed (in particular the safety instructions).
General safety instructions
– Thelocalguidelinesandregulationsfortheinstallationandoperationofgasred
equipment(steamhumidiers)mustbeadheredtowithoutreservation.
– AllpersonsworkingwiththeCondairGS...OChumidiermustobserveandcomply
withallinformationandsafetyinstructionscontained in the present Installation,
commissioning and service instructions.
Iftheinformationinthismanualisnotfollowedexactly,areorexplosionmay
resultcausingpropertydamage,personalinjuryorlossoflife.
– Caution!Whattodoifyousmellgas:
Do not try to light any appliance. Do nottouchanyelectricalswitch;do not use any
telephone in your building. Immediately call your gas supplier from a neighbor’s tel
ephone.Followthegassupplier’sinstructions.Ifyoucannotreachyourgassupplier,
calltheredepartment.
– Do notstoreorusegasolineorotherammablevaporsandliquidsinthevicinityof
this or any other appliance.
–Warning! Improper installation, adjustment, alteration, service, maintenance, or use
cancausecarbonmonoxidepoisoning,anexplosion,re,electricalshock,orother
conditionswhichmaycausepersonalinjuryorpropertydamage.
Refertothismanual.Forassistanceoradditionalinformationconsultaqualiedinstaller,
service agency, local gas supplier, or your distributor or branch.
–Warning! Should overheating occur, or the gas fail to shut off, shut off the manual gas
valve to the appliance before shutting off the electrical supply.
–Warning! Do not use this appliance if any part has been exposedtoexcesshumidity.
Immediatelycallaqualiedservicetechniciantoinspecttheapplianceandtoreplace
anypartofthecontrolsystemandanygascontrolwhichhasbeenunderwater.
– The Condair GS...OC humidier must only be installed, operated, and serviced by
personsfamiliarwiththeproductandsufcientlyqualiedfortherespectivetask.It is
the customer’s responsibility to ensure that the present Installation, commissioning and
service instructionsissupplementedbyinternalinstructionswithrespecttosupervisory
andnoticationliability,workingmethods,personnelqualications,etc.
– Anopenunit must not be operated. Before putting the Condair GS...OC humidier
intooperationmakesureall panels are closed and locked with the screw or the
brackets respectively.
– Donotcarryoutanyoperationsforwhichyouarenotsufcientlyqualiedorunfamiliar
withtheconsequences.Incaseofdoubt,contactyoursupervisororCondairsupplier
beforehand.

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– Before carrying out working steps on particular components of the Condair GS...OC
humidiersetthehumidierout of service, disconnectitfromthepowersupply by
settingtheserviceswitchto“Off”,close the gas supply and secure the unit against
unintentional operation.
Warning! Iftheambienttemperatureisbelowthefreezing-pointthewatertank
mustbedrained(seealsochapter7.4).
– Warning!Beforecarryingoutmaintenanceorrepairworks,especiallyunderextreme
weather conditions (e.g. rain, snow),protecttheunitinawaythatnoelectricalor
othercomponentsinsidetheunitcangetwet(coverunitwithatent).
Ifpartsinsidetheunithavebecomewet,letthemdrythoroughlyandhavethehumidi
ercheckedbyaqualiedservicetechnicianbeforerestarting.
– Installation, maintenance, and repair of the electrical and the gas installation of the
CondairGS...OChumidiermustbecarriedoutonlybyqualiedpersonnelbeingaware
of possible danger and implications.
– Poorlymaintainedhumidicationsystemsmayendangerhealthandaffectproperop
eration. Therefore it is mandatory to observethespeciedmaintenanceintervals
and to carryoutmaintenanceworkinstrictaccordancewiththeinstructions.
Note:ThewatersuppliedtotheCondairGS...OCcontainsmineralswhichcontinuously
accumulateinsidethewatertankduringtheevaporationprocess.Topreventexcess
accumulation,thewatertankmustbecleanedonaregularschedule.
– Observealllocalsafetyregulationsregardingthehandlingofmainspoweredandgas
reddevices.
– Attention! Theelectronicpartsinsidethehumidierareverysensitivetoelectrostatic
discharge. To prevent damage, appropriatemeasuresagainstelectrostaticdischarge
(ESD protection)mustbetakenwhenworkingonanopenunit.
– ForsafeoperationoftheCondairGS...OChumidier,makesuretheambientconditions
(temperature/humidity)meettherespectivespecicationsdenedinthisdocumentation
(see chapter 10.1):
– Safeoperatingambienttemperatures–Aslongastheunitispoweredandis
running,theheatgeneratedinternally(ie.thatcomesoffofthetank)issufcientto
keepthespaceinsidetheenclosurewarmandwillprotecttheelectronics(theelectric
heaterswillnotcomeonveryoftenexceptduringextremelycoldtemperatures).
Forthisreason,theunitwilloperatesafelyatoutdoortemperaturesbetween-25°C
(-13°F) and +35°C (95°F).
Note:a thermostatically controlled coolingfan will be activatedin the enclosure
whentheinternaltemperaturesmeasuredintheelectronicsareaexceeds25°C.
– Safe ambient temperature range if there is no power – If there is no power
supplied to the unit, the unit can not run to generate any heat and the electric heat
ersandthecoolingfanwillalsonotwork!Thereforetheunitissafetositoutdoor
withoutanypoweratoutdoortemperaturesbetween0°C (32°F) and 25°C (80°F).
This temperature range is limited because of the electronics.
Warning!Iftheunithasbeenexposedtotemperaturesoutsideoftheabovestated
range,donotrestarttheunit.Beforerestartingthehumidierhaveaqualiedservice
technician inspect the appliance and replace any defective part.
Warning!Iftheoutsidetemperatureisbelow5°Cwhenreconnectingtheunitto
thepowersupplylettheheatersoftheunittobeonforaminimumof30minutes
to heat the electronics before starting the unit.

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– Ifitisassumedthatsafeoperationisnolongerpossible,switchtheCondairGS...OC
off,closethegassupplyandsecuretheunitagainstinadvertentpowerup.Safeopera
tionmaybeaffectedinthefollowingevents:
– you smell gas
– componentsoftheCondairGS...OChumidieraredamaged.
– theCondairGS...OChumidierdoesnotworkcorrectly.
– componentsoftheCondairGS...OChumidierarewornorbadlysoiled.
– after longtime storage under unfavorable conditions.
– after transportation under unfavorable conditions.
– TheCondairGS...OCmustbeinstalledonlyinlocationsequippedwithawaterdrain
orwithsensorsthatsafelyinterruptwatersupplyincaseofleakage.
– TopreventexcesshumidicationtheoperationoftheCondairGS...OCmustbemoni
toredbyahighlimiton/offhumidistat(seechapters5.8/5.9).
– Use only genuine accessories and spare parts available from your Condair supplier.
– TheCondairGS...OChumidierandtheoptionalaccessoriesmustnotbemodied
in any waywithoutthewrittenconsentofthemanufacturer.
TheworldwidewellorganizedCondairdistributornetworkprovidesserviceatalltimesby
qualiedtechnicians.PleasecontactyourCondairsupplierincaseoftroubleorifyouhave
anyquestionsconcerningtheGS...OChumidierandhumidicationtechnologyingeneral.

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3 Product Overview
3.1 Product versions/Model designations
The Condair GS...OC gasred steam humidier is available in 6 different models with different
maximumsteamoutputperformance(40,80,120,160,200and240kg/h).
Allmodelscanbeoperatedwithnaturalgasorpropane(exworkstheunitissuppliedforaspecic
type of gas operation, as stated on the rating plate).
Model designation
GS 40 OC CG20
Product line
(gasred steam humidier with
operation and display unit)
Steam output (kg/h)
40
80
120
160
200
240
Housing for outdoor installation
(Outdoor Cabinet)
Equipment series
Fuel
Natural gas H, E, E(S): G20
Natural gas L, ELL: G25
Natural gas HS: G25.1
Natural gas Lw: G27
Natural gas Ls: GZ350
Propane gas P: G31
** model designation on rating plate
TheCondairGS...OCgasredsteamhumidiersarebuiltintoanoutdoorcabinetforoutdoorinstallation.
Thehumidiersareequippedwithanoperating and display unit,asstandard,bymeansofwhichthe
currentoperatingparameterscanbeinterrogatedandtheequipmentcanbeconguredforoperation.
Thehumidiersarecontrolled via the internal PID controlleroranexternalcontinuous controller.
3.2 Delivery
The standard delivery includes:
– GasredsteamhumidierCondairGS...OC(accordingtothemodeldesignation)completewithall
uegascomponentsincluded
– Installation, commissioning and service instructions Condair GS...OC C series
– Operating instructions Condair GS...OC C series control
– Sparepartslist(pink)
– Accessories ordered according to chapter 4.4 (steam distribution pipes, steam hoses, etc.).
**

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3.3 Humidicationsystemoverview
 1 Gasredsteamhumidier
 2 Fluegaspipewithraincapandstormcollar
(included in the delivery)
3 Steam supply pipe (building side)
4 Gas supply connection
 5 Shutoffvalvegassupplyline(buildingside)
6 Gas supply line (building side)
7 Sediment trap (building side)
 8 Fillwaterconnection
 9 Checkvalve
10 Drainwaterconnection
11 Drainwaterline(buildingside)
12 Shutoffvalvewatersupply(buildingside)
13 Auxiliarydrainconnection
14 Electrical connections (building side)
15 Filter valve (accessory “Z261”)
16 Water supply line (building side)
17 Funnelwithtrap(buildingside)
18 Steam hose adapter (accessory “SA...”)
19 Condensatehose(accessory“KS10”)
20 Steamhose(accessory“DS80”)
21 Steam distribution pipe (accessory “81–...”)
7
4
6
5
14
1
13
15
16
17 17
8
10
9
11
12
2
3
21
18
3
19
20
19

10
 1 Watertank
2 Steam outlet connection
 3 Heatexchanger(1to3)
4 Burner (1 to 6)
5 Level unit
 6 Keypadanddisplayunit
7 Indication LED’s
green: “Steam production”
  yellow:“Maintenance”
red: “Error”
 8 Drainkey(manualdraining)
 9 Drainoverrideswitch(manualdraining)
10 Unitswitch
11 Tansformer
12 Control board
13 Driver board
14 Remote operating and fault indication board
3.4 Constructionofthegasredsteamhumidier
15 Ignition modules
16 Burner electronic
17 Combustionairblower(1to6)
18 Flame sensor
19 Igniter
20 Drainpump
21 Airpressureswitch
22 Gas pressure control valve (1 to 6)
23 Auxiliarydrainconnection
24 Drain connection
25 Doubleinletvalvellingwater
26 Connectionllingwater
27 Connection gas supply line
28 Vacuumbreak
29 Fillingchamber
30 Compartmentforexternalserviceswitch
31 Fluegaspipewithraincapandstormcollar
15
611
3
4
2
1
7 8 9 13
16
23
20
21
5
24
27
25
26
28
22
29
18
19
17
14
30
31
12
10

11
C
B
A
3.5 Principle of operation
CombustionSystem
Thecombustionsystemis basedonafullymodulating forceddraftcombustion airblower,anega
tivepressureregulatorgasvalveanda100%premixburner.Onacallforhumidity,thecombustion
airblowerstartsandcreatesanegativepressureacrossanoricelocatedattheairinlet.Theblower
starts for a moment to purge the system, then the hot surface ignitor is activated. During this time the
electronicignitionmoduledoesadiagnosticcheckofsafetysystemsincludingtheairprovingswitch
whichsensesthenegativepressureattheairinlet.
Afterthe function of thesafety systems has been veried, the gas valve will open and the gas/air
mixtureisignitedbythehotsurfaceignitor.Ifameissensedbytheamesensorwithin7 seconds
thegasvalveremainsopenandcombustioncontinues.Ifameisnotsensed,theabovesequenceis
repeatedamaximumofthreetimesafterwhichtheignitionmodulewilllockoutandarespectiveerror
messagewillappearinthedisplay.
ThegasvalvemaintainsaconstantratioofairtoNaturalGasorPropaneindependentofblowerspeed
orexternalconditions.Thisairandfuelisthoroughlymixedintheblowerandthenforcedthroughthe
burnerportswhereignitionoccurs.
Hotproductsofcombustionareforcedthroughabafeinsidetheheatexchangerandthenvented
outside.Theheatexchangerhaslargeverticalsurfacestominimizescalebuildupandpromotescale
sheddingtothebottomofthetank.Thisselfcleaningactionhelpstomaintaintheefciencyoftheheat
exchangerwhilethesmoothsurfacesallowforeasycleaningwhennecessary.
TheGS40OChasasinglecombustionchamber/heatexchanger.Thecombustionsystemisduplicated
onlargerunitswithmultiplechambersinsideacommontank.
Regulation of the water level in the tank
Pressure equalizer
Filling chamber
Vacuum break
Main ll line
Double ll valve
Drain outlet
Drain pump
Auxiliary drain
Mixing pipe
Level unit

12
Thelevelinthewatertankiscontinuouslymonitoredbythelevelunit.Oninitialstartup,thecontrolunit
checksthefunctionofthelevelunit.Duringthistestthetankislleduprsttolevel“A”,thendrained
tolevel“C”andlledupagaintolevel“A”.Assoonaslevel“B”isreachedandthetestofthelevelunit
wassuccessfulthehumidierisreadyforoperation,ifahumidicationdemandispresentthecombus
tion process starts.
Whenthewaterlevelduetotheevaporationprocessreacheslevel“B”,thelevelunitsendsasignal
tothecontrolsystem,whichopensthedoubleinletvalveandthewatertankislledup.Onreaching
level “A”, the level unit again sends a signal to the control system and the double inlet valve is closed.
Ifthewaterlevelgoesbelowlevel“C”,thecombustionwillbeinterrupteduntilthewaterlevelreaches
“C” again.
To ensure safe operation, the control system constantly monitors the proper function of the level unit
in regular intervals.
Steamgeneration/control
Thesteamisgeneratedinthewatertankviatheheatexchanger/s.Thesteamproductionisregulated
continuouslybytheinternalPIDcontrolleroranexternalcontinuouscontroller.
Flushing
Theconcentrationofmineralsinthewaterinthetankincreasesduetotheevaporationprocess.Inorder
thatthisconcentrationdoesnotexceedaspeciedvalue,anappropriatequantityofwaterispumped
offfromthetankataxedtimeintervalandreplacedbyfreshwater.Theseushingcyclesarebased
onsteamproductiontoincreasetheefciencyofthehumidier.
Whenaushingcycleisinitiatedthedrainpumpisactivatedandtheinletvalveopens.Inthemixing
pipebelowthellingchamberthehotdrainwaterismixedwiththecoldcoolingwaterandleavesthe
unitwithatemperatureapprox.around6070°C.
Ifthelowestoperatinglevelisreachedinthetankduringtheushingprocess,theinletvalveremains
openuntilthewaterlevelinthetankhasagainreachedthenormaloperatinglevel.

13
4 Basic planning
Condair GS 80 OC CG20
1. Requiredmaximumsteamcapacity
2. Requiredcombustiongas
AllthedatanecessaryfortheselectionandlayoutofaCondairGS...OChumidiersystemareprovided
inthefollowingchapters.
4.1 Selecting the unit
Theselectionoftheunitisreectedinthetypedescription:
4.1.1 Calculatingthemaximumrequiredsteamcapacity
Themaximumrequiredsteamcapacityiscalculatedfrom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,x2andx1 can be gathered from the h,x-diagram or the Carrier-Diagram for moist
air respectively.
Foraroughestimateofthecalculatedsteamcapacity,thefollowingtablecanbeused.Thevalues
listedinthetablearebasedonadesiredroomairtemperatureof20°Candadesiredrelativeroomair
humidityof45%rh.
Note:Toroughlyestimatethecalculatedmaximumsteamcapacityforlargersupplyairportionsorroom
volumes, the values listed in the table can be projected accordingly.

14
Max. portion of supply air in m3/hr or room max. steam
volume to be humidied per hour in m3/hr capacity in kg/h
Temperature / rel. humidity of supply air
-15 °C / 90%rh -5°C / 80%rh 5°C / 60%rh
5000 6600 8000 40
10000 13200 16000 80
15000 19800 24000 120
20000 26400 32000 160
25000 33000 40000 200
30000 39600 48000 240
Condair GS 80 OC CG20
Example:
Max. portion of supply air 10000 m3/h, temperature/
rel. humidity of supply air -15°C/90%rh
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.
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 Condair 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Condairsupplier.
4.1.2 Combustiongas
TheCondairGS...OCcanbeoperatedwithnatural gas or propane.Theequipmentiscongured
exworksfortherespectivecombustiongasthatistobeemployed.Ifrequired,theequipmentcanbe
convertedatalaterdatetoworkwithoneoftheothercombustiongas.
Combustion gas Designation
Natural gas H, E, E(S) G20
Natural gas L, ELL G25
Natural gas HS G25.1
Natural gas Lw G27
Natural gas Ls GZ350
Propane gas P (Liquid gas)G31
Condair GS 80 OC CG20

15
4.2 Selectingthecontrolsystem
Thevariouscontrolsystems
– System1:Roomhumiditycontrol
System 1 is suited for airconditioningsystemswithmainlyrecirculatedair. The humidity sensor
ispreferablylocatedintheroomitselforintheexhaustairduct.
A1/2 humidity sensor
B1 ventilation interlock
B2 airow monitor
B3 safety humidistat
PIE external continuous controller (e.g. PI-controller)
PIDI internal continuous controller (PID controller)
Y input signal from A1
Z input signal from A2
A1 humidity sensor
B1 ventilation interlock
B2 airow monitor
B3 safety humidistat
PIE external continuous controller (e.g. PI-controller)
PIDI internal continuous controller (PID controller)
Y input signal from A1
– 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 humidity control.
Thehumiditysensor(A1)ispreferablylocatedintheexhaustairductorintheroomitself.Thehu
midity 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 the internal PID controller or anexternal
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 humidistat.

16
– System3:Supplyairhumiditycontrolwithcontinuousoutputlimitation
Supplyairhumiditycontrol(humiditysensorinstalledinsupplyairduct)shouldbeused
onlywhereroomhumiditycontrolisimpracticablefortechnicalreasons.Suchsystemsalways
requireaPIcontroller.
The humidity sensor (A1) is located in the supply air duct after the steam distribution pipe. The
humidity sensor (A2) for the continuous output limitation is located in the supply air duct before the
steamdistributionpipe.Suchasystemrequires the internal PID controller oranexternalPIcontroller
withtheoptiontoconnectasecondhumiditysensor.
Whichhumiditycontrolsystemforwhichapplication?
Application Location of the humidity sensor
Room or exhaust air duct supply air duct
Air conditioning systems with:
Supply air portion up to 33% System 1 System 1
Supply air portion up to 66% System 1 or 2 System 2 or 3
Supply air portion up to 100% System 2 System 3
Supply air humidity control ––– System 3
PleasecontactyourCondair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
A1/2 humidity sensor
B1 ventilation interlock
B2 airow monitor
B3 safety humidistat
PIE external PI-controller
PIDI internal continuous controller (PID controller)
Y input signal from A1
Z input signal from A2

17
4.3 Options
At the moment no options are needed for the Condair GS...OC.
4.4 Accessories
4.4.1 Accessories overview
Model Condair GS...OC 40 ... 80 ... 120 ... 160 ... 200 ... 240 ...
Steam distribution pipe
(see accessory details in chapter 4.4.2)
81-...
number 123456
OptiSorp
steam distribution system
(see accessory details in chapter 4.4.2)
System 1 System 2 System 3 System 4 System 2
System 3
System 3
number 11111 of each 2
Steam hose adapter ––– SA80
(3" / 2x 1 3/4")
SA120
(3" / 3x 1 3/4")
SA160
(4" / 4x 1 3/4")
SA200
(4" / 6x 1 3/4")
SA240
(4" / 6x 1 3/4")
number ––– 11111
Steam hose / meter DS80
number 123456
Condensate hose / meter KS10
number 123456
Filter valve Z261 (1 pc. per system)
Control/input signals
The Condair GS...OC is regulated viatheinternalPIDcontrolleroranexternalcontinuouscontrollrt
(e.g. PI controller).
Important!Forthecontrolsystems2and3theexternalcontrollermustbeequippedwithtwocontrol
signal inputs.
TheCondairGS...OCprocessesthefollowingcontrolsignals:
– 0 ... 10 VDC
– 2 ... 10 VDC
– 0...10mADC
– 2...10mADC
– 0...20mADC
– 4...20mADC
– 0 ... 5 VDC
– 1 ... 5 VDC
FurtherinformationisprovidedinChapter5.9.
Output signals
TheCondairGS...OCprovidesthefollowingoutputsignals:
– 10VDC(max.20mA)
– Remoteoperatingandfaultsignals(4potentialfreecontacts)
FurtherinformationisprovidedinChapter5.9.

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OptiSorp Number of steam
connections
Max. steam capacity
in kg/h 1)
Duct dimensions
Width in mm Height in mm
System 1 145 (30) 450...4000 450...1650
System 2 290 (60) 450...4000 450...2200
System 3 3 135 (90) 450...4000 800...3200
System 4 4180 (120) 450...4000 800...3200
1) For duct widths <600 mm the values in brackets apply
4.4.2 Accessory details
Steamdistributionpipes
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distance).
Steam distribution pipes 1) for GS...OC
40, 80, 120, 160, 200 and 240
Duct width (B) Steam capacity
Type Length in mm (L) 2) in mm max. in kg/h 3)
81-350 350 400…600 30
81-500 500 600…750 30
81-650 650 750…900 50
81-800 800 900…1100 50
81-1000 1000 1100…1300 50
81-1200 1200 1300…1600 50
81-1500 1500 1600…2000 50
81-1800 1800 2000…2400 50
81-2000 2000 2200…2600 50
81-2300 2300 2500…2900 50
81-2500 2500 2700…3100 50
1) Material: CrNi steel
2) Special length on request
3) To fully exploit the overall capacity of your GS...OC humidier, the output of each steam outlet
may be fed to more than one distribution pipe. If more than one steam distribution pipe is fed
per steam outlet the steam line must be divided into multiple branches. Appropriate ttings are
available on request.
Note:Ifthehumidicationdistance(seechapter5.3.1)hastobereducedfortechnicalreasons,the
steamoutputofyourunitmustbedividedbetweentwosteamdistributionpipes or the OptiSorp
steamdistributionsystem must be used. If this is the case, contact your Condair supplier.
OptiSorpsteamdistributionsystem
TheOptiSorpsteamdistributionsystemisusedinventilationductswithashorthumidicationdistance
(forthecalculationofthehumidicationdistancerefertochapter5.3.1).WhenorderinganOptiSorp
systemtheductdimensionmustbespecied.Pleaseconsultthedatainthefollowingtable.
B
L
B
H

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5 Mounting and installation works
5.1 Safetyinstructionsformountingandinstallationworks
5.2 Unittting
5.2.1 Humidierlocation
ToensureproperfunctioningofthesteamhumidierCondairGS...OCandtoobtainoptimumefciency,
thefollowingpointsmustbeconsideredandobservedwhenchoosingthelocationforthesteamhumidier:
– The Condair GS...OC must be mounted only outside of buildingswheretheuegasescanescape
freely.
– the local and national regulationsforinstallationofgasredequipmentmustbeobservedand
followed.Themanufactureracceptsnoliabilityfornoncompliancewiththeseregulations.
– Installthesteamhumidiersothatthelengthofthesteamhoseis as short as possible (ideally
2m,max.4m), the minimumbendradius (R=300mm) and the minimumupslope (20 %) and
the minimumdownslope (5 %) of the steam hose can be maintained (see Chapter 5.3.2).
Note:Longsteamlinesreducethemaximumsteamoutputofthehumidier,duetotheheatloss
involved. The static pressure also increases.
– Installthesteamhumidiersothattheuegasoutletmeetsthefollowingminimumdistances:
– atleast0.6maboveanyridgelocatedwithin3m
– atleast1maboveanyforcedairinletlocatedwithin3m
– at least 1 m belowand1mhorizontallyawayfrom,or0.5maboveanydoor,window,orgravity
air inlet of any adjacent building.
– atleast1mhorizontallyawayfromelectricmeters,gasmeters,regulatorandreliefequipment.
– atleast2.5mabovegradewhenitisadjacenttopublicwalkways.
– MakesureintheplaceoflocationoftheCondairGS...OCthesupplyofcleanfreshairisprovided.
Theunitmustbeplacedatleast3mawayfromanymechanicalexhaustoutlet.
Caution!Operationofthehumidierwithuncleanaircanleadtosafetyproblemsandreduce
theoutputoftheunit.Impuritiesintheairare,forexample:Halogens,ammonia,chloride,
excessivedust,limeanddirt.Forquestionsaboutairquality,pleaserefertothetechnical
service department of your Condair distributor.
Thelocaldirectivesandregulationsfortheinstallationofgasredequipment(Steam
humidiers)mustbeunconditionallyobservedandcompliedwith.
All local regulations relatingtotheexecutionofgas,uegas,water,steamandelectrical
installationsmustbeobservedandcompliedwith.
Allmountingandinstallationworkmustbeperformedonlybyadequatelyqualiedper-
sonnel.Ascertainingthequalicationsisthecustomer‘sresponsibility.
All the information contained in these installation, commissioning and service instructions
relatingtoequipmentassemblyandtogas,uegas,water,steamandelectricalinstalla
tion mustbeunconditionallyobservedandcompliedwith.
Caution-Dangerfromelectricshock!Theconnectionofthesteamhumidierto
themainselectricalsupplymustnotbemadeuntilallinstallationworkhasbeen
completed.
Caution!Incorrectlyexecutedinstallationscanresultinpersonalinjuryand/ordamage
topropertythroughexplosions,res,carbonmonoxidepoisoning,electricshock,etc.If
yourequireassistance,pleasecontactaqualiedinstaller,yourlocalgassupplieroryour
Condair representative. In the installation itself, use only materials available from your
Condair representative and accessories approved by him.

20
min. 3000 mm min. 3000 mm min. 3000 mm min. 3000 mm
min. 1000 mmmin. 1000 mm
min. 500 mmmin. 1000 mm
min. 600 mm
min. 500 mm
min. 600 mm min. 600 mm min. 600 mm
– TheCondairGS...OCgasredsteamhumidiersaredesignedformountingonacurb.
Caution!Thecurbandtheplaceofinstallationmustbebuilttostructurallysupporttheentire
weightofthehumidierwheninoperation.
– ThesheetcoveringoftheCondairGS...OCheatsupduringoperation(max.surfacetemperature
approx.6070°C).Thereforemakesurethatnoheatsensitivematerialsareplacedintheimmedi
atevicinityofthehumidier.
– Nocombustiblematerialsmust be placed in the immediatevicinityof the Condair GS...OC hu
midier(Insulationmaterials,woodenoorcoverings,etc.).Observe local regulations!
– Donotmountthehumidieronabasethatissubjecttovibration.Ifnecessary,pleasecontactyour
Condair representative.
– Donotcovertheairopenings(louvers)inthepanelsoftheunit,otherwisetheairowmaybeinsuf
cient.
– Donotplacetheunitinanarrownicheoraclosedcompartment.Placethehumidiersothattheunit
is easily accessibleandthereissufcientspaceformaintenancework.Theminimumdistances
showninthefollowingillustrationmustbemaintained.
above surface where snow and ice could accumulate