Install Instructions

Part Number 550-142-902/1016
CGi
GAS-FIRED WATER BOILER — SERIES 3 — Boiler Manual
17
Venting — direct exhaust — termination3e
Figure 12 Vent termination minimum clearances
Follow instructions on this page when determin-
ing vent location to avoid possibility of severe
personal injury, death or substantial property
damage.
1. Locatetheboilerandventpenetrationthroughthewallso
all requirements on this page and in Figure 12 will be met.
Alsofollowventmanufacturer’sinstructions.
2. Gaseswillformwhiteplumeinwinter.Plumecouldobstruct
window view.
3. Prevailing winds could cause freezing of condensate and wa-
ter/ice buildup on vent termination, building, plants or roof.
Ice buildup on vent termination can cause boiler shutdown
and building freeze up.
4. Winds over 31 mph can cause nuisance boiler shutdown if
boiler is sidewall vented. This could result in loss of heat to
building, causing freeze up.
5. Locateorguardventterminationtopreventcondensatefrom
damaging exterior surfaces.
6. Locatetheventterminationwellawayfromtrees,shrubs,and
decorative items.
7. Locateorguardventtopreventaccidentalcontactbypeople
or pets.
8. Do not terminate vent in windowwell,stairwell,alcove,
courtyard, or other recessed areas.
9. Donotwraporinsulateventpipeorttings.
10.Donotterminateventaboveanydoororwindow.Condensate
can freeze, causing ice formations.
11.Donotconnect:
• Anyotherappliancetoventpipe.
• Multipleboilerstoacommonventpipe.
The vent termination must be located to meet all requirements below (also applies to vertical vent terminations). The minimum
distancefromadjacentpublicwalkways,adjacentbuildings,openablewindowsandbuildingintheNationalFuelGasCode,ANSI
Z223.1/NFPA54and/ortheNaturalGasandPropaneInstallationCode,CAN/CSAB149.1.Theventterminationclearancesbelow
areforU.S.A.,forCanadianventterminationclearancespleaserefertotherequirementsofCSAB149.1NaturalGasandPropane
InstallationCode.Considerationshouldbegiventoavoidpossibledamagecausedbyventplumesandcondensatewhenchoosing
aventingcongurationandlocation.Maintainaminimumclearanceof4ft.(1.22m)horizontallyfrom,andinnocase
aboveor
below, unless a 4 ft. (1.22m) horizontal distance is maintained, from electrical meters, gas meters, regulators, and relief equipment.
12. Canadian installations —See B149.1 or B149.2 Natural
GasandPropaneInstallationCode.Terminateventnoless
than 6 feet from another combustion air inlet, 3 feet from
any other building opening, and 3 feet from any gas service
regulator.
13.See
Figure 12, showing that the vent must terminate:
• morethan4feetbelowortosideofalldoorsorwindows.
• morethan1footabovegradeoranticipatedsnowline.
• atleast7feetabovepublicwalkway.
• 3feetaboveanyforcedairintakewithin10feet.
14.Ventmustalsoterminate:
• atleast6feetawayfromadjacentwalls.
• nocloserthan5feetbelowroofoverhang.
• atminimumof4feethorizontally(andinnocase
above or below unless a 4 foot horizontal distance is
maintained) from electric meters, gas meters, regula-
tors, relief valves, and other equipment.
15.Siteconditionsmaydictategreaterclearances.
16.Donotextendexposedventpipeoutsideofbuildingmore
than 4 feet.
 Condensatecouldfreezeandblockventpipe.
A gas vent extending through an exterior
wall shall not terminate adjacent to the wall
or below building extensions such as eaves,
parapets, balconies or decks. Failure to comply
could result in severe personal injury, death or
substantial property damage.