PREMIUM FEATURES • 95% AFUE – High efficiency and low emissions! • Six wall hung models; 85, 110, 155, 205, 270 MBH • 155 MBH combi model available! – Best-in-class DHW performance • Field-proven, stainless steel fire tube heat exchanger • Advanced Sage2.2 boiler control provides “out-of-the-box” high performance and easy setup – Ergonomically angled touch screen display simplifies installation, operation, and diagnostics – Easily connects to optional Sage Zone Control for additional energy savings, system optimization, and “short cycle” prevention • High altitude – zero or minimal de-ratings, reduces the costs of oversizing, field adjustable • FULL SIZE easy access side service panel VALUABLE EXTRAS INCLUDED • Versatile top and bottom connections for supply & return (on heating-only boilers) • Universal vent connection for CPVC/PVC, polypropylene • Split-voltage junction box, fused easy-connect terminals • Outdoor reset and sensor (wired) • Piped & wired for low water cutoff installation (probe not included) • 5-year parts warranty ANYWHERE UNMATCHED ANYWHERE UNMATCHED High Efficiency, Gas Fired, Stainless Steel, Condensing Boiler COMBI AVAILABLE! MADE IN U.S.A.
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PREMIUM FEATURES
• 95%AFUE –Highefficiencyandlowemissions!
• Sixwallhungmodels;85,110,155,205,270MBH
•155 MBH combi model available! –Best-in-classDHWperformance
• Field-proven,stainlesssteelfiretubeheatexchanger
• AdvancedSage2.2boilercontrolprovides “out-of-the-box”highperformanceandeasysetup –Ergonomicallyangledtouchscreendisplay simplifiesinstallation,operation,anddiagnostics –Easilyconnectstooptional Sage Zone Control foradditionalenergy savings,system optimization,and“short cycle”prevention
• Highaltitude–zeroorminimalde-ratings, reducesthecostsofoversizing,fieldadjustable
• FULL SIZEeasyaccesssideservicepanel
VALUABLE EXTRAS INCLUDED
• Versatile top and bottom connections for supply & return (on heating-only boilers)
• UniversalventconnectionforCPVC/PVC, polypropylene
• Split-voltagejunctionbox,fusedeasy-connect terminals
• Outdoorresetandsensor(wired)• Piped&wiredforlowwatercutoffinstallation (probenotincluded)
• 5-yearpartswarranty
ANYWHEREUNMATCHED
ANYWHEREUNMATCHED
High Efficiency, Gas Fired, Stainless Steel, Condensing Boiler
COMBI AVAILABLE!
MADE IN U.S.A.
©2016U.S.BoilerCompany,Inc.Lancaster,PAPhone:1-888-432-8887
FormNo.USBL16020120m6/16
www.usboiler.net
K2 Firetube: Technical InformationK2FT Ratings & Specifications
Model AFUE%
Input(MBH)
min-max
DOE HeatingCapacity(MBH)
Net AHRI
(MBH)MAWP(PSI)
Vent Size
(Inches)
Approx. Shipping Weight (lbs.)
K2FT-085 95.0 17-85 79 69 30 2or3 140K2FT-110 95.0 22-110 102 89 30 2or3 145K2FT-155 95.0 31-155 145 126 30 3 160K2FT-205 95.0 41-205 190 165 80 3 175
K2FT-270 95.0 54-270 251 218 80 3 185COMBIMODEL*
K2FTC-155 95.0 31-155 145 126 30 3 170
Standard Equipment • Directvent,sealedcombustionappliance• 5:1turndown• NaturalorLPgas,fieldconvertible• Stainlesssteelheatexchanger,firetube• Easyaccesscontrolpanel• Separated,fusedhighandlowvoltageconnections• Sage2.2ControlSystem –LCDtouchscreendisplay,angled –Self-guidedcontrolmenus –Built-inselfdiagnostics –(3)Circulatoroutputsavailable –Built-insequencer,stagesupto(8)boilers –Outdoorresetincludingoutsidesensor –DHWpriority –Warmweathershutdown –Modbuscommunications –Passwordsecurity• Variablespeedcombustionblower• Gasvalve• Polypropylenecondensatetrap• LWCO-readyNPTconnection• Supply,return,andautoresethighlimitwatersensors• Universalventconnection(CPVC/PVC,PP)• Fluegastemperaturesensoranddifferentialpressureswitch• 30PSIsafetyreliefvalve• Pre-installedhangingbracketandwallmountkit• Fieldadjustableforhighaltitudewithminimalderate• Thermostatic DHW mixing valve(K2FTC-155combionly)
SafetyReliefValvePressure,Water–30PSIstd.ASMEcertified“H”.Maxallowabletemperaturesetting210ºF.Targetsetpointis180°F,manualresethighlimitsetpointis210°F.Boilersshippedsetfornaturalgas.Aboveperformanceisforelevationsto2000’.Consultmanualforinstructionsandperformanceforinstallationsupto10,100’.Allowableventlengthsupto135ft.
Typical Venting Configurations (Horizontal and Vertical)
Horizontal2-pipelowprofile
Horizontal2-pipeconcentric
Illustrationsareforrepresentationonly.Forcompleteventinginformation,pleaseseeInstallationmanual.
Vertical2-pipe
Vertical2-pipeconcentric
Horizontal2-pipe
Hybrid
Verticalexhaust/sealedB-ventforcombustionair
*DHWflowrateofoptionalcombi-equippedmodelK2FTC-155is4.0GPM@70°TR
Accessories:• SageZoneControl(P/N:104590-01)• Wirelessadapteroutdoorreset(PN:105121-01)• LWCOkit(P/N:100592-01or105591-01)• Servicepartsrepairkit(P/N:107118-01)• Kit,CPVCstarterandPVCventterminations: (2”P/N:107039-01)(3”P/N:107039-02)
Control Access Panel
33-5/16”Gas Connection1/2”
CondensateConnection
Condensate Trap Cleanout
Drain Valve
VentConnection
Relief Valve
Air IntakeConnection
Temperature/Pressure
Gauge
Alternate Return/InletWater Connection
(heating-only models)
ServiceAccess
Panel
AlternateSupply/Outlet
Water Connection(heating-only models)
Return/Inlet Water
Connection1”
Supply/OutletWater Connection - 1”
Outsideof Wall
Insideof Wall
19-13/16”
A
Dimensions (Inches)
Model A
K2FT-085 20
K2FT-110 20
K2FT-155 20
K2FT-205 21
K2FT-270 21
K2FTC-155 23
ASM
E
H
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