Model MSH & MH
Master Specication
The Electric Heater Company
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P.O. Box 288
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Stratford, CT 06615-0288
Phone: (203) 378-2659
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FAX: (203) 378-3593
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www.hubbellheaters.com
Marine Products Division
SHIP NAME
SHIPYARD
ENGINEER / NAVAL ARCHITECT
CONTRACTOR
Committed to continuous improvements
Continuing research results in product improvement; therefore these
specifications are subject to change without notice. For the most updated
information, consult the factory.
General
Provideaquantityof packagedtypeMarineElectric
waterheater(s)ModelNo. as
manufacturedbyHUBBELLTheElectricHeaterCo.,Stratford,CT.
Thewaterheatershallbeconstructedspecicallyforshipboard
installationbyutilizingdeckandbulkheadmountingsupportsthat
areintegrallymountedtothepressurevessel.Thepressurevessel
section,includingtheelectricalcontrolpanel,shallbemountedon
structuralsupportsandbesuitablyinsulated,jacketed,painted,and
providedwithliftinglugs.Theentireunitistobepackagedready
forplumbingandelectricserviceconnectionsandshallbeartheUL
listingmarkcertifyingtheentirewaterheater.Thewaterheatershall
conformtoUSCGregulationsandbeABSlistedandapproved.
Pressure Vessel
ThepressurevesselshallbeallweldedconstructionandASME
CodeSectionIVstampedforaworkingpressureof100psiand
containaminimumof gallonsofstorage.Thestorage
vesselshallbecarbonsteelandlinedwithseamlessHydrastone
cementappliedtoaminimumthicknessof
5
/8"on100%ofall
interiortanksurfaces,(
Optional Specications:Phenolic lined
steel tank, solid 90/10 copper- nickel tank, solid Type 304, 316 or 316L
Stainless Steel Tank.)Thepressurevesselistobecoveredwith2"
thickberglassblanketinsulationandenclosedinaheavygauge
galvanizedsteelmetaljacketnishedingrayhammertoneenamel.
ThevesselshallbeprotectedbyanASMEapprovedautomatic
reseatingcombinationtemperatureandpressurereliefvalvesetat
thetankworkingpressureand210°F.
Electric Recovery
Therecoverysectionshallberatedat KWwhichwill
heat GPHofwaterat °Frise( °Fto
°F).
Electric Controls
Theheatershallbedesignedtooperateat volts,
phase, HZwithafusedlowvoltage
transformerproviding120volttoalloperatingcontrols.The
immersionheatingelement(s)shallbehighqualitycoppersheathed
(
Optional Specication:Incoloy, Type 304, 316 or 321 stainless
steel)andsizedtoobtaintheratedrecovery.Eachelementcircuit
istobeindependentlyoperatedthroughadenitepurposemagnetic
contactorhavingaresistiveloadratingequaltoorexceedingthe
ampereratingofthatparticularcircuitandshallbeprotectedby
individualpowerfusesratedapproximately125%oftheampacity
ofthecircuit.Multiplecircuitelementsshallbeprovidedwitha
powerdistributionblockforconnectingoftheincomingpowerfeeds
(
Optional Specications:Built-in non-fused On/Off disconnect
switch, built- in circuit breaker with an On/Off handle. )Asafetydoor
interlockswitchshallinterruptpowertothecontrolcircuitwhen
thecontrolpaneldoorisopened.Thecontrolthermostatshallbe
immersiontypeandshallbeconsistentwiththerecoveryrateofthe
heatingelementastothenumberofstepsrequired.Ahi-limitcontrol
withamanualresetbuttonshallbefactoryinstalledtodisconnectall
ungroundedconductorstotheheatingelement(s)intheeventofan
over-temperatureconditioninthestoragesection.
Option
Option
Option
Warranty
Thewaterheatermanufacturershallwarrantyallcomponentsagainst
defectsinworkmanshipandmaterialforaperiodofone(1)yearfrom
dateofstartup,andthepressurevesselforafullve(5)yearsNon
Pro-Rated(
Optional Specication:full ten (10) years Non Pro-
Rated tank warranty)fromstart-up,providedthattheunitisstarted
withinthree(3)monthsofdateofshipmentandinstalledandoperated
withinthescopeofthetankdesignandoperatingcapability.Each
waterheatershallbeshippedwithacompletesetofinstallationand
operatinginstructionsincludingsparepartslistandapproveddrawing.
Dual Fuel Package
Shall be required
Shall not be required
Theheatingcoilshallutilize(
Optional Specication:steam,
boiler water, HTHW )andberatedtoheat GPHof
waterata °Frise( °Fto °F)
whensuppliedwith psisteamtothecontrolvalveand
consume lbs/hoursteam.Theheatingcoilshallbea
fullyremovableimmersionU-tubeheatingcoilratedfor150psi
workingpressure.Thesinglewall(
Optional Specication:
Double wall )coilshallbeconstructedfrom18BWG
3
/4"OD
copper(
Optional Specication:90/10 Copper-nickel, stainless
steel )tubes.Thecoilincludingthetubesheet,bafes,andspacers
shallhaveallnon-ferrouswettedpartsandafabricatedsteelhead.
Thewaterheatershall(shallnot)besuppliedwithsteamoperating
controls.Aself-contained
(
Optional Specication:Pneumatic, pilot, electric )typesteam
controlvalveshallregulatetheowofsteamtotheheatingcoilin
ordertocontrolwatertemperature.Adriptrap,maincondensate
trap,Ystrainers,vacuumbreaker,andsteampressuregaugeshall
befactorysizedandpipedwiththesteamcontrolvalve.
In addition, the following steam options may be selected:
Option Thewaterheatershallbeequippedwith
afactory-packagedintra-tankcirculatorto
continuouslycirculatewaterwithinthetankto
reducestratication.
Option Theheatingcoilshallbewrappedandbafed
andpipedwithanintegralpumppackagetoforce
circulatewaterovertheheatingcoilinorderto
reducethecoilsize.
OptionSinglesolenoidsafetysystemtoclosethecontrol
valveshouldthewatertemperatureinthetank
reachthehi-limitsetpoint.Requires5Amp,120
Voltservice.
Option Doublesolenoidsafetysystemdumpsover
heatedwaterinthestoragetanktodrainin
additiontoclosingthecontrolvalve.Requires5
Amp,120Voltservice.