Williamson Series 2 - Page 10

10
Part Number 550-142-785/0812
GWI Series 2 Gas-Fired Water Boilers – Boiler Manual
Direct exhaust venting continued
1. Locatetheboilerandventpenetrationthroughthewallsoall
requirementsonthispageandinFigures 4 and 5 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
water/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, court-
yard, or other recessed areas.
9. Do not wrap or insulate vent pipe or fittings.
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.
12.Canadianinstallations—SeeB149.1orB149.2Installation
Code.Terminateventnolessthan6feetfromanothercom-
bustionairinlet,3feetfromanyotherbuildingopening,and
3feetfromanygasserviceregulator.
13. See Figures 4 and 5, showing that the vent must terminate:
• atleast7feetabovepublicwalkway.
• 3feetaboveanyforcedairintakewithin10feet.
• morethan4feetbelowortosideofalldoorsorwindows.
• morethan1footabovegradeoranticipatedsnowline.
14. Vent must also terminate:
• atleast6feetawayfromadjacentwalls.
• nocloserthan5feetbelowroofoverhang.
• atleast4feethorizontally(andinnocaseaboveorbelow
unless a 4 foot horizontaldistance is maintained) from
electricmeters,gasmeters,regulators,reliefvalves,and
otherequipment.
15. Site conditions may dictate greater clearances.
16.Donotextendexposedventpipeoutsideofbuilding.Conden-
sate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,overhangs,balconiesor
decks.Failuretocomplycouldresultinsevereper-
sonal injury, death or substantial property damage.
Vent termination location
Follow instructions on this page when determining
ventlocationtoavoidpossibilityofseverepersonal
injury, death or substantial property damage.
Figure 4 Maintain minimum clearances from public
walkways and building air openings
Figure 5 Maintain minimum clearances from doors,
windows and snow line
3 Vent installation continued