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ASME
UA Heavy Steam Fired Semi-Instantaneous Water
HeaterTheModelSTXisafullypackagedsemi-instantaneoussteamfiredwaterheaterwhichutilizessteamforheatingpotablewater.Theentirepackageisdesignedtobeareliableandlonglastingsourceforhotwater.Eachcomponentiscarefullyselectedtoensurehighperformanceineventhemostdemandingapplication.
Whetheryouareheatingpotablewaterinacommercialbuildingorprocesswaterinanindustrialapplication,youcanselectaHubbellSTXmodeltodothejob.WhenyouspecifyandinstallaHubbellwaterheater,youwillbeprovidedwithaqualityproductthatisalonglastingandtroublefreesourceforhotwater.
Applications Schools OfficeBuildings SportsComplexes Hotels
TheModelSTXisequippedwithalloperatingcontrolsandreadyforimmediateinstallation
IndustrialFacilities NursingHomes Hospitals
Model STX Semi-Instantaneous Type
MODEL STX
Features Reliable
Onlyhighgradematerialsusedinconstructiontoensurelongoperatinglife
Heatexchangepressurevesselconstructedfrom316L Stainless
Steelforlongservicelife
Heavydutyconstructionwithstandsdemandingcommercial/industrialuse
Packaged System Factoryselectedandsizedsteamcontrol
valvesimplifiesinstallationandensuresreliableoperation
Allsteamoperatingcontrolsarefactorysizedandselectedtoensurereliableoperation
Versatile Fullrangeofstyles,sizes,andoptional
featurestomeetyourexactheatingneeds
Model STX Semi-Instantaneous Type
A Packaged Water Heater Ready For Installation
Packaged Semi-Instantaneous Steam Fired Water HeaterShell and
Tube Style Heater
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Model STX Semi Instantaneous Standard Equipment
Optional Equipment
Heating Coil3. Doublewalltubingwithaleakdetection
port4. Alternatetubingmaterialpleasespecify:
(StainlessSteel,90/10Copper-Nickel,Admiralty)
5.
Fabricatedheadconstructedfrom:(StainlessSteel,CopperAlloy)
Vessel Construction1. Solid316L Stainless
Steelvesseldesignedand
builtinstrict accordancewiththeASMECodeSectionVIII
andstamped,certified,andregisteredwiththe
NationalBoardofBoilerandPressureVessel Inspectors
2. Designedfor150psiworkingpressureandhydrostaticallytested
Heating Coil1. Factorysizedandinstalledcopperheating
coilwithagenerouslysizedheatingsurfacedesignedtoensurereliableoperation
2.
U-Tubeheatingcoilconstructedfromsinglewallcoppertubingdesignedforamaximumworkingpressureof150psi
3.
HeavydutyfabricatedsteelheadwiththreadedNPTinletandoutletconnections
4. Allwettedpartsarenon-ferrousformaximumlongevity
5. Non-Ferroustubesheet
Steam Water Operating Controls1.
Steamoperatingcontrolsarefactoryselected,sized,
pipedandtestedtoensurereliableoperation2.
Allsteamcomponentsarefactoryplumbedwith
schedule40blackironpipeandreadyforsteam
andcondensateconnections
3.
Highqualitycastironpilotoperatedsteamcontrolvalvemodulatestheflowofsteamthroughtheheatingcoiltoprovideaccuratewatertemperaturecontrol
4.
CastironYstrainerwith20Meshscreenprotectsthesteamcontrolsandcoilfromdirtanddebrisinthesteamsupply
5. Thermostaticdriptrapremovescondensatefrom
thesteamsupplyline
6.
Heavydutycastironfloatandthermostaticmaincondensatetrapforoptimumefficiency
7. Allbronzeintegralcirculatingpump8.
Panelmountedsteamanddomesticwater
temperatureandpressuregauges9.
HighlimitSinglesolenoidsafetysystemcloses the
steamsupplytotheheatingcoilshouldthe
watertemperatureinthetankreachthehi-limit
setpoint.Requires120volt5ampelectricalservice
General1. Heavydutyfiberglassinsulationcompliant
with ASHRAE 90.1 for maximumoperatingefficiencyandminimal
stand-byheatloss
2. Heavygaugepaintedgalvanizedsteelprotectiveouterjacket
3.
Heavydutyintegrallyweldedsteelsupportsandbaseforfloormounting
4.
Fullfive(5)yearNonPro-Ratedpressurevesselandaone(1)yearcomponentwarranty
5.
ASMEratedcombinationT&Preliefvalvesetatthetankworkingpressureand210oF
Vessel1. Alternatevesselconstruction:
Solid 90/10 CuNi2. Alternateworkingpressure:
Pleasespecify
Operating Controls
NOTE:Otheroptionalfeaturesareavailable,pleaseconsultfactoryifrequired.
General
2
6.
Type304stainlesssteelprotectiveouterjacket,pleasespecifyifpainted
7. Condensate orifice trap in lieu of floatand thermostatic
steam trap for subcooling.
8. A double solenoid safety system dumpsover heated water in the
vessel to drainin addition to closing the steam supplyto the
heating coil. Requires 120 volt 5amp electrical service
9. Electric or Pneumatic operated steamcontrol valve
10. Electric Control package for integrationwith Energy
Management Software(EMS) and Building Automation Software(BAS).
MODBUS communication tomonitor the heater via RS-232 orRS-485
Please note: optional equipment may impact overall dimensions
and weight. Please request submittal drawing from factory.
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3
Note:Alldimensionsareapproximateandsubjecttochange.Pleasereferencethesubmittaldrawingforactualdimensions.Pleaseconsultfactoryforrecoveryratingsforsteampressuresnotshown.
Model STX Vertical Dimensions (inches)Model No. Based on 100oFT
Recovery Rate (40-140F)
Base Model
Recovery Rating (GPH)
40-140F
BTU/Hr
Steam Supply
Pressure (psi)
Vertical Model STX Overall Dimensions (inches)Weight (Lbs)
Single Wall Double Wall
A B C D E A B C D E
STXSS600 600 500,000
5 99 46 35 12 18 100 46 35 13 19 610
15 87 40 29 12 18 100 46 35 13 19 585
25 87 40 29 12 18 88 40 29 13 19 585
50 87 40 29 12 18 88 40 29 13 19 585
75 99 46 36 11 17 88 40 29 13 19 560
STXSS900 900 750,000
5 88 40 29 13 19 88 41 28 15 21 655
15 99 46 35 12 18 100 46 35 13 19 610
25 99 46 35 12 18 100 46 35 13 19 610
50 87 40 29 12 18 88 40 29 13 19 585
75 87 40 29 12 18 88 40 29 13 19 585
STXSS1200 1200 1,000,000
5 88 40 29 13 19 88 41 28 15 21 655
15 76 34 23 13 19 88 41 28 15 21 615
25 76 34 23 13 19 100 46 35 13 19 615
50 87 40 29 13 18 100 46 35 13 19 585
75 87 40 29 13 18 88 40 29 13 19 585
STXSS1500 1500 1,250,000
5 76 35 22 15 21 100 47 34 15 21 770
15 88 40 29 13 19 88 41 28 15 21 655
25 76 34 23 13 19 88 41 28 15 21 615
50 99 46 35 12 18 100 46 35 13 19 610
75 87 40 29 12 18 100 46 35 13 19 585
STXSS1800 1800 1,500,000
5 76 35 22 15 21 89 41 28 17 23 770
15 76 35 22 15 21 88 41 28 15 21 770
25 88 40 29 13 19 88 41 28 15 21 655
50 76 34 23 13 19 88 41 28 15 21 615
75 99 46 35 12 18 100 46 35 13 19 610
STXSS2400 2400 2,000,000
5 77 35 22 17 23 89 41 28 17 23 985
15 76 35 22 15 21 100 47 34 15 21 770
25 76 35 22 15 21 88 41 28 15 21 770
50 88 40 29 13 19 88 41 28 15 21 655
75 88 40 29 13 19 88 41 28 15 21 655
STXSS3000 3000 2,500,000
5 77 35 22 17 23 78 36 21 19 25 985
15 76 35 22 15 21 89 41 28 17 23 770
25 76 35 22 15 21 89 41 28 17 23 770
50 76 35 22 15 21 88 41 28 15 21 770
75 88 40 29 13 19 88 41 28 15 21 655
STXSS3600 3600 3,000,000
5 77 35 22 17 23 90 42 27 19 25 985
15 77 35 22 17 23 89 41 28 17 23 985
25 76 35 22 15 21 89 41 28 17 23 770
50 76 35 22 15 21 100 47 34 15 21 770
75 76 35 22 15 21 88 41 28 15 21 770
STXSS4200 4200 3,500,000
5 78 36 21 19 25 90 42 27 19 25 1130
15 77 35 22 17 23 78 36 21 19 25 985
25 77 35 22 17 23 89 41 28 17 23 985
50 76 35 22 15 21 89 41 28 17 23 770
75 76 35 22 15 21 100 47 34 15 21 770
STXSS4800 4800 4,000,000
5 78 36 21 19 25 96 43 33 20 27 1130
15 77 35 22 17 23 90 42 27 19 25 985
25 77 35 22 17 23 78 36 21 19 25 985
50 76 35 22 15 21 89 41 28 17 23 770
75 76 35 22 15 21 100 47 34 15 21 770
STXSS6000 6000 5,000,000
5 84 37 27 20 27 87 38 27 22 31 1480
15 78 36 21 19 25 90 42 27 19 25 1130
25 77 35 22 17 23 78 36 21 19 25 985
50 77 35 22 17 23 89 41 28 17 23 985
75 76 35 22 15 21 89 41 28 17 23 770
STXSS7500 7500 6,250,000
5 87 38 27 22 31 1610
15 78 36 21 19 25 87 38 27 22 31 1130
25 78 36 21 19 25 84 37 27 20 27 1130
50 77 35 22 17 23 90 42 27 19 25 985
75 77 35 22 17 23 89 41 28 17 23 985
STXSS9000 9000 7,500,000
5
15 84 37 27 20 27 99 44 33 22 31 1480
25 78 36 21 19 25 99 44 33 22 31 1130
50 78 36 21 19 25 90 42 27 19 25 1130
75 77 35 22 17 23 90 42 27 19 25 985
STXSS10500 10,500 8,750,000
5
15 87 38 27 22 31 1610
25 84 37 27 20 27 99 44 33 22 31 1480
50 78 36 21 19 25 96 43 33 20 27 1130
75 77 35 22 17 23 90 42 27 19 25 985
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Product Overview - Model STXH (Horizontal)
Horizontal Semi-Instantaneous Steam Fired
Outline Dimensions - Model STX (Vertical)
Vertical Semi-Instantaneous Steam Fired
END VIEW
T&P Relief Valve
Pressure Gauge
Control Valve
Solenoid ValveHi-Limit
T&P Relief Valve
Hot Water Outlet
Protective Jacket
Thermometer
Hi-Limit ThermostatPump Switch
Pressure Gauge
Cold Water Inlet
Recirculation Pump
Temperature Controller
Solenoid Valve
Control Valve
Drain
D
E
A
B
C
Insulation
Steam Inlet
Inlet Strainer
Drip Trap
Condensate Outlet
Main Trap
Trap Strainer
Hi-Limit
HotWaterOutlet
TOPVIEW
ProtectiveJacket
Thermometer
PumpSwitch
ColdWaterInlet
RecirculationPump
TemperatureController
Drain
Insulation
WithdrawalSpace
Hi-LimitThermostat
Note:Pleasecontactfactoryforhorizontaldimensions
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Redundant System Skid Package Option
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Step2
VesselType:
CN =Copper-Nickel
SS =316L StainlessSteel
Step1Model:
STX =VerticalSTXH =Horizontal
STX Model Number Designation
Step3
RecoveryRating:InGPHat100oFT
Option
NoteAnyandalloptionalequipmentforawaterheatermustbecalledoutinthewrittenspecifications.Amodelnumberinandofitselfdoesnotreflectanyoptionalequipmentselected.
SS
Example:STXSS-3600SAverticallyinstalledsemi-instantaneoussteamfiredwaterheaterwitha316L
Stainless
Steelpressurevesselandsinglewallheatingcoilratedtoheat3600GPHata100oFtemperaturerise.
Step4
CoilType:S=SingleWallD=DoubleWall
6
Model Number Designation
Steam Consumption Formula
Metric Conversions
Liters x 0.2641 = Gallons
Gallons x 3.79 = Liters
Gallons x 0.003785 = m3
m3 x 264.2 = Gallons
1oCT = 1.8oFToF = (oC x 1.8) + 32
oC = (oF - 32) x 0.556
psi x 0.06896 = Bar
Bar x 14.5 = psi
psi x 6.86 = kPa
kPa x 0.1456 = psi
Lbs x 0.4536 = Kg
Kg x 2.2 = Lbs
ft2 x 0.0929 = m2
m2 x 10.765 = ft2
GPH x oFT x 8.33= Lbs/Hr Steam
LatentHeatofSteam
SteamPressure(psi) 0 2 5 10 15 20 25 30 40 50LatentHeat 970 966
960 953 946 939 933 929 920 912
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Hot Water Out
To Drain
To Drain
Drain
Drain
Steam
Supply
Conden
sate Re
turn
RecirculationCold Water In
To Drain
Conden
sate Re
turn
Steam
Supply
Hot Wa
ter Out
Recircu
lation
Cold W
ater In
Drain
SINGLEUNIT
DUALUNIT
Piping Layouts
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8
Conden
sate Re
turn
Steam
Supply
Hot Wa
ter Sup
ply Hot W
ater Ou
t
Hot Wa
ter Ret
urn
Storag
eTan
k
Recircu
lation
Cold W
ater In
To Drain
To Drain
Drain
Piping Layouts
SINGLEUNITWITHSTORAGETANK
Strainer
Stop Valve
Check Valve
Control Valve
Relief Valve
Thermal Element
Pressure Gauge
Temperature Gauge
Steam Trap
Circulator
Expansion Tank
LEGEND
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GENERALProvideaquantityof_________semiinstantaneoussteamfiredwaterheater(s),ModelNo._____________________________
asmanufacturedbyHUBBELLElectricHeaterCo.,Stratford,CT.Thepressurevesselshallbemountedonheavydutysteelstructuralsupportsandbesuitablyinsulated,jacketed,paintedandprovidedwithliftinglugs.Theentireunitistobepackagedreadyforserviceconnections.
PRESSURE VESSELTheshellsectionshallbeconstructedfrom316L
stainless steel.( OptionalSpecification:90/10
copper-nickel).Vesselshallbestampedfor150psiunderSectionVIIIoftheASMECode(
OptionalSpecification:
_____psi).ManufacturersdatareportandU-1formsshallbefurnishedtotheowner.Nooverheadclearanceshallberequiredforservicingorremovingtheheatingcoil.Eachheatershallbedesignedtoheat_________GPHofdomesticwaterfrom________to_________oFwhensuppliedwith_________psiofsteam.
HEATING COILTheheatingcoilshallbefabricatedwithsinglewall(
OptionalSpecification:Doublewall)copper,(
OptionalSpecification:Stainlesssteel,90/10copper-nickel,admiralty)tubes,non-ferrousbafflesandstainless
steeltubesheet.
Theheatershallhaveitstemperaturecontrolbulblocatedfordirectsensingofwater.
CONTROLSThewaterheatersteamandoperatingcontrolsshallbefactoryassembledandpiped.Amodulatingsteamcontrolvalveshallbe(Specify:Pneumatic,electric,selfcontained).Solenoidcontrolvalvesthatregulatetheflowofsteamtotheheatingcoilshallnotbeaccepted.
Each heater shall be factory packaged with the following
components:
Allbronzeintegralcirculatingpumpwithcopperpipingandisolationvalves
Panelmountedsteampressureandwatertemperaturegauges
Highlimitsafetysystem ASMEratedtemperatureandpressurereliefvalve
Fiberglassinsulationwithpaintedmetaljacket
CastironstrainersandF&Ttraps
OPTIONSInaddition,thewaterheatershallbesuppliedwiththefollowingoptionalfeatures:
Option
Option
Option
WARRANTYThewaterheatermanufacturershallwarrantyallcomponentsagainstdefectsinWorkmanshipandmaterialforaperiodofone(1)yearfromdateofstart-upandthepressurevesselforafullfive(5)yearsNonPro-Rated(
OptionalSpecification:fullten(10)yearsNonPro-Rated)fromdateofstart-up,providedthattheunitisstartedwithinthree(3)monthsofdateofshipmentandinstalledandoperatedwithinthescopeofthetankdesignandoperatingcapability.Eachwaterheatershallbeshippedwithacompletesetofinstallationandoperatinginstructionsincludingasparepartslistandapproveddrawing.
JOBNAME
REPRESENTATIVE
ENGINEER
CONTRACTOR
Master Specification: Model STX
The Electric Heater Company P.O. Box 288 Stratford, CT
06615-0288 Phone: 203-378-2659 Fax:
[email protected] www.hubbellheaters.com
ISO 9001:2008 ISO
Committed to continuous improvement...Continuing research
results in product improvement; therefore specifications are
subject to
change without notice. For the most updated information, consult
the factory directly.
MadeintheU.S.A.
[Rev B]
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