o Factory tested

o Easy service

• Swing-away burner door

• Low draft loss

• Top access cleanoutcover

• Plug-in wiring harness

o High efficiency oil burner

• Flame retention headdesign

• Solenoid valve

• PSC motor

• Solid state ignitor

o Rear flue outlet

o Cast iron sections

o Insulated heavy-gaugesteel jacket

o Limited lifetime warranty

I~IWilliamson

aSBOil-fired Steam Boilerso Factory-packaged

o 1.00 to 2.00 GPH Input

o Optional tankless heater

RATINGS

Boiler I=B=R burner DOE Net I=B=R DOE Flue Minimum I=B=R Boiler Draft lossmodel capacity heating steam seasonal outlet Chimney water through

number capacity ratings efficiency size (x 15' high) content boiler

- GPli<D MBH@ Sq.Ft.@ MBH@ %AFUE (Round) Rectangle Round (Gallons @ Inchesw.e.normalwatertine)

058-3-100 1.00 116 363 I 87 82.1 7" 8" x 8" 6" 10.7 .000

058-4-110 1.10 129 404 97 82.0 7" 8" x 8" 6" 12.5 .010

058-4-125 1.25 145 454 109 81.7 7" 8/1 x B" 6" 12.5 .010I

058-5-135 1.35 158 492 119 81.5 7" 811 x 8" 7" 14.2 .010

058-5-150 1.50 175 546 I 131 81.4 7" 8" x 8" 7" 14.2 .010

058-6-175 1.75 204 638 153 81.1 7" 8" x 8" 7" 16.0 .000

058-6-200 2.00 232 725 174 81.4 7" 8" X 8" 7" 16.0 .015

<D Basedon 140,000Btuhper gallon,#2 fuel oil. @ Net I=B=Rratingsare basedon net installedradiationof sufficient quantityfor the requirementsof the build-@ Basedon standardtest proceduresprescribedby the UnitedStatesDepartmentof ing and nothing needbeaddedfor normal piping andpickup. Ratingsare basedon a piping and pickup

Energy,with combustionconditionsof 13% C02 and-0.02" w.e. draft. allowanceof 1.333. Additionalallowanceshould bemadefor unusualpiping and pickup loads.

®DOE

DIMENSIONS

Boiler Optional I=W=Hmodel tankless Intermittent

heater draw rating® (40'Fto 140'F)

I aSH 3.25 GPMI

E 3.50 GPM

! 35-S-29aSH 3.75 GPM

-aSH 4.00 GPM

I Tankless heater tappings are WNPT, with 3,4" NPT tapping for tank-less temperature control.

ALL DIMENSIONS IN INCHES

Drain valve

CD Supply piping one (note 1)® Supply piping two, OSB-6 only (note 1)@ Return piping (note 1)@) Relief valve, SA" NPT@ Vent connection - 7" diameter

__ ORDER CODE,--------- OS=Oil Steam Boiler

B=Boiler

OSB -

,------ Number of Sections

6 1755 1504 1253 - 100

Input in GPH #2 Fuel Oil

4

Supply tapping(s)

---r9\1,

7

290/"

Note1: Boilersupplytappingsare2Yi' NPT.Returntappingis 1Yi'NPTon all boiler sizes. Install one 2W' supply riser formodelsOSB-3,OS8-4andOS8-5:two 2Y2'supplyrisersforsizeOSB-6.

Note 2: If field-installingafloat lowwatercutoff, it mustbeinstalledinthegaugeglasstappings.Noothertappingsareusableforfloatlowwatercutoffs.

• Pressure gauge• Siphon• Gauge glass, gauge cocks and guards• 15 PSIG ASME relief valve• Drain valve• Barometric damper

OPTIONAL• Two-stage oil burner fuel unit• Tankless heater, shipped in separate

carton

~t::::::J8201 W. Calumet Road • Milwaukee, WI 53223

Williamsonwww.williamson-thermoflo.com Form W-007 (03/04)

IBurner: B=Becketl

c-carnn R=Riello,(Shipped in

separate box)

Probe Low~IWater Culoff

B - P- W

1Ys

@ Pressure limit control® Oil burner (shipped in separate carton)® Probe-type low water cutoff® Tankless coil & temp. control (when used)® Pressure gauge

EQUIPMENT• Factory tested• Factory-assembled cast iron section

assembly, including aluminized steel fluecollector, swing-away burner mountingdoor, refractory blanket and recessedtarget wall in combustion chamber

• Flame-retention oil burner (Beckett AFG,or Carlin EZ, or Riello)

• High limit pressure control• Probe low water cutoff

WARRANTY• Ten-year limited warranty on cast iron

sections• 3-year limited warranty on parts• Optional 5- or 10-year parts and labor

warranty