OSB 2 SERIES User Manual

6 Part Number 550-110-772/0816
OSB Series 2 Oil-Fired Steam Boilers – Boiler Manual
3 Connect breeching
Connect breeching
 Longhorizontalbreechings,excessive numberof
tees and elbows, or other obstructions restricting
combustion gas flow can result in possibility
of condensation, flue gas leakage and carbon
monoxide emissions, which can lead to severe
personal injury or death.
1. SeeFigure2a.Backoutlet(Standard).
 ForTopoutlet(availableonlywithoptional“TopVentService
Kit”,SeeSection12“ReplacementParts”)SeeFigure2b.
2. Connectfull-sizedbreechingwhenpossible.SeeTable3.
3. Connection must be made above bottom of chimney to avoid
blockage. Breeching must not enter chimney far enough to
causeobstruction.Usethimbleorslipjointwherebreeching
enters chimney to allow removal for cleaning.
4. When burner and boiler are properly installed, draft overfire
willbeapproximately-0.01”to-0.02”W.C.Installbarometric
controlinbreeching,percontrolmanufacturer’sinstructions,
whenexcessdraft needs to be relievedorto comply with
applicablecodesandregulations.Usedraftgaugetoadjust
proper opening.
5. Aninduceddraftfanforthechimneymaybenecessaryif:
• Excessiveresistancetoowofcombustiongasescanbe
expected.
• Cross-sectionalareaofchimneyissmallerthanminimum
recommended.
• Chimneyheightislessthanrecommended.
• Sealallventjoints.Interlockburnerwithfanoperation.
Figure 2a Standard back outlet chimney and breeching
connections
Typical location for
Barometric Control
(Also see Control
Manufacturer’s
Instructions)
Flue Pipe
Bracket
(one on each
side of pipe)
Table 3 Chimney and breeching minimum sizes
Boiler
model
number
Minimum
breeching
diameter
Note 1
Minimum
chimney size
Minimum
chimney
height
Rectangle
Note 2
Round
OSB-3 5” 8” x 8” 6” 15’
OSB-4 6” 8” x 8” 6” 15’
OSB-5 6” 8” x 8” 7” 15’
OSB-6 7” 8” x 8” 7” 15’
Notes:
1. Flue collar on boiler is 7.00” diameter.
2. 6-3/4” x 6-3/4” inside liner
Figure 2b Top outlet breeching connection
(only with optional “Top Vent Service Kit” ).
Typical location for
Barometric Control
(Also see Control
Manufacturer’s
Instructions)
Flue Pipe Bracket
(one on each side of pipe)

OSB 2 SERIES Specifications

General

Brand	OSB
Model	2 SERIES
Category	Boiler
Language	English