Burnham K2WTC - Page 65

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VII. Venting I. Assembly of Stainless Steel Vent Systems (continued)
d. Whenexiblestainlesssteelpipeisusedforcombustionproductventing,itmustbeinstalledatverticalornearvertical
orientation.Thiswillinsurepropercondensateowbacktowardstheboiler.
e. Followexiblestainlesssteelpipemanufacturerspecicinstructionsregardingapplication/listing,permits,minimum
clearancestocombustibles,installationdetails(properjointassembly,pipesupportandrouting,gasketandtting
installation, optional tooling availability/usage, routing through masonry combination of combustion product venting and
combustion air supply).
f. Whenthereisaconictbetweenexiblestainlesssteelpipemanufacturerinstallationinstructionsandboilerinstallation,
Operating and Service Instructions, the more restrictive instructions shall govern.
WARNING
Asphyxiation Hazard. Flexible stainless steel vent must be installed only in an UNUSED chimney ue. A
chimney ue in considered UNUSED when it is not being used for any appliance venting. If chimney is a
multiple ue type where one of the multiple ue is being used for an appliance venting, the exible stainless
vent installation is permitted through an adjacent, unused ue providing a local authority having jurisdiction
approves such installation.
Asphyxiation Hazard. Flexible stainless steel pipe must be installed at vertical or near vertical plane when
used for combustion product venting. Failure to do so will result in improper condensate drainage towards
the boiler and possible subsequent vent pipe blockage.