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High Efficiency Gas Fired, Stainless Steel, Condensing Water Boiler
VALUE-PRICED WITH PREMIUM FEATURES
• 95%AFUEwith10:1turndown–NEW!
• Reliable,provenstainlesssteelheatexchanger technology
• Factorypre-setSage2.3™ControlSystem, providingout-of-the-boxhighperformance
• Touchscreendiagnosticdisplaywith plain-languageguidance
• Exclusivefeaturesforinstallerconvenience andhomeownerdependability
• Highaltitude–Minimalde-ratings,reducesthe costsofoversizing,fieldadjustable
• FREE5-yearpartswarrantyincluded
• LowNOx*
EXTRA BUILT-IN FEATURES
• Highcapacitypre-installedboilerloop circulator• Split-voltagejunctionbox• Universalboilerventconnectionfor polypropylene,CPVC/PVC,& stainlesssteel• Outdoorresetandsensor
ANYWHEREUNMATCHED
ANYWHEREUNMATCHED
MADE IN U.S.A.*MeetsrequirementsofSouthCoastRule1146.2
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K2 It’sthecondensingboilerthatyou’vebeenaskingfor…
SAVES TIME!• IntelligentSage2.3BoilerControlSystem
–Factorypre-setsoffer“out-of-the-box” performance
–Touchscreendisplaywithstep-by-stepsetup guidanceanddiagnostics
• Designedforeaseofinstallation&service
–Hingedcontroldoorisolateselectronics– Fastandeasyaccesstocombustion chamber
–“Coldburnerdoor”speedsservicestart
–Integral,easyaccessjunctionboxincluded withseparatehighvoltageandfused,low voltagecommunicationboards
–Easyclean-outcondensatetrap
–Sideaccesspanel
• Universalboilerventconnection (polypropylene,CPVC/PVC,andstainlesssteelflex)
SAVES MONEY!• Pre-installedpremiumboilerloopcirculator eliminatespumpselectionandexpense
Display product shown. Interior of junction box is visible for illustration purposes only.
Contractors told us exactly what they wanted.Avalue-priced,highefficiencycondensingboilerthatissimpleenoughto
installquicklyANDoffersvaluableextrasnotfoundoncompetitivemodels.U.S.BoilerCompanyhasdelivered.
TheK2offersacomprehensivefeaturelist,unequalledeaseofsetup,maintenance,andoperationinapackagethatcosts
farlessthanyou’dexpectfortheimpressivevaluethat’sbuiltin.Andbestofall,it’sbuiltandtestedwithprideinLancaster,
PennsylvaniabyU.S.BoilerCompany.
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HOMEOWNER VALUE!• Stainlesssteelheatexchangerofferslong-term reliability
–Nowelds,reducingpotentialcorrosionpoints
• Highefficiency,highperformance,highcomfort
–95%AFUE
–10:1turndownlowersfueluse
–Veryquietoperation-negativepressuredesign
–“Coldburnerdoor”designrecoversheatfor addedenergysavings
• Attractive,reinforced16and22-gaugesteel construction
• Advancedsystemtestingcarefullyverifiesthe performanceeveryK2boilerbeforeitleavesour factory
–Worry-freeinstallation;boilerdisplayverifies reliableoperation
• FREE5-yearpartswarrantyincluded
Pre-installedhighcapacitypumpoptimizeswaterflowtoensureproperboileroperation.Sidepanelaccess.
Touchscreendisplayoffersstep-by-stepassistanceinsetupandtroubleshooting.
Display product shown. Interior of junction box is visible for illustration purposes only.
FastPipe™,optionalready-madeprimary/secondarypipingsolutionsavesinstallationtimeandcost.
K2CombiModels(availablelate2017)featureanintegratedflatplateheatexchangerfordomestichotwater.Availableinthreesizes–120,150,and180MBH.(Completeproductinfoavailableseparately).
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©2018U.S.BoilerCompany,Inc.Lancaster,PAPhone:1-888-432-8887FormNo.USBL1406120m9/17
www.usboiler.net
K2: Technical Information ASM
E
H
K2 Ratings & Specifications
Model AFUE%
Input(MBH)
min-max
DOE HeatingCapacity(MBH)
Net AHRI
(MBH)
Vent Size
(Inches)
Approx. Net
Weight (lbs.)
K2WT-080B 95.0 8-80 74 64 2or3 100K2WT-100B 95.0 10-100 94 82 2or3 102K2WT-120B 95.0 12-120 112 97 3 105K2WT-150B 95.0 15-150 142 123 3 119
K2WT-180B 95.0 18-180 169 147 3 119K2WT-180M 94.5 18-180 168 146 3 119
Standard Equipment • Directvent,10:1turndown,sealedcombustionappliance
• Stainlesssteelheatexchanger
• Pre-installedboilerloopcirculator
• Easyaccesscontrolpanelonhingeddoor
• Separatedhighandlowvoltagejunctionbox
• Sage2.3ControlSystem –LCDtouchscreendisplay –Self-guidedcontrolmenus –Built-inselfdiagnostics –(2)additionalcirculatoroutputsavailable –Built-insequencer,stagesupto(8)boilers –Outdoorresetincludingoutsidesensor –DHWpriority –Warmweathershutdown
• Variablespeedcombustionblower
• Gasvalve
• Polypropylenecondensatetrap
• Flowswitch,pre-installed
• Supply,return,andautoresethighlimitwatersensors
• Universalexhaustventconnection(CPVC/PVC,PP,SS)
• Fluegastemperaturesensoranddifferentialpressureswitch
• Pre-installedhangingbracketandwallmountkit
• Fieldadjustableforhighaltitude
K2 Dimensions (Inches)Model A* B C
K2WT-080B 16-3/16 3 7-3/8
K2WT-100B 16-3/16 3 7-7/16
K2WT-120B 16-3/16 3 7-7/16
K2WT-150B 20-3/16 4-7/16 8
K2WT-180B/M 20-3/16 4-7/16 8
17”
29”
Air Intake
Vent
Access Panel
3-9/16”4-3/4”
5-1/16”
A A
1” NPT Supply
C
B
1” NPT Return
7-3/16”4-1/8”
10-5/16” 1-15/16”
1-13/16”
1/2” Gas Line
Condensate Trap Outlet
Left Front Right
Top
Bottom
6”
*Opencontroldoorextendsdimensionadditional15”
SafetyReliefValvePressure,Water–30PSIstd.ASMEcertified“H”.MaximumAllowableWorkingPressureat50PSI,Maxallowabletemperaturesetting210ºF.Targetsetpointis180°F,manualresethighlimitsetpointis210°F.Boilersshippedsetfornaturalgas.Aboveperformanceisforelevationsto2000’.ConsultInstallation,Operating,andServiceInstructionsforinstallationsupto10,100’.180Mmodelisonlyforinstallationsosver2,000’
Typical Venting Configurations (Horizontal and Vertical–up to 135 eq.ft.each)
Horizontal2-pipelowprofile
Horizontal2-pipeconcentric
Illustrationsareforrepresentationonly.Forcompleteventinginformation,pleaseseeInstallation,Operating,andServiceInstructions.
Vertical2-pipe
Vertical2-pipeconcentric
Horizontal2-pipe
Hybrid
Verticalexhaust/sealedB-ventforcombustionair
PLUS polypropylene & stainless steel chimney chase options
C
Optional Equipment:• Naturalgas;LPconversionkitforelevations to2000’soldseparately: 080B-100BP/N:107873-01 120B-150BP/N:107874-01 180BP/N:107875-01 180MP/N:108101-01• FastPipeprimary/secondaryadapterPN: 80-120MBH–(106259-01) 150,180MBH–(106259-02)• SageZoneControl (CirculatorPanelP/N:104590-01) (ValvePanelP/N104589-01)• LWCOkit(P/N:105591-01)• Servicepartskit(P/N:106260-03)• Floorstandkit(P/N:108017-01)• Kit,CPVCstarterandPVCventterminations (2”P/N:107039-01,3”P/N:107039-02)