Weil-McLain CGi Series 3 Installation And Maintenance Manual page 17

CG i
GAS-FIRED wATER BOILER- sERIEs a -
Boiler Manual
3e
Venting - direct exhaust - termination
I&
WARNING!
Follow instructions on this page
when detem1ining vent location to
avoid possibility of severe personal
injury, death or substantial property
damage.
l. Locate the boiler and vent penetration through the
wall so all requirements o n this page and in Fig-
ure 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 freezi ng of condensate
and water/ice buildup on vent termination, building,
plants or roof.
Ice
buildup on vent terminatio n can
cause boiler shutdown and building freeze up.
4. Winds over 3 1 mph can cause nuisance boiler shut-
down 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 con·
densate 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 fittings.
l 0. Do not terminate vent above any door or window.
Condensate can fre. e .ze, causing ice formations.
11 .
Do not connect
Any o ther appliance to vent pipe.
Multiple boilers to a commo n vent pipe.
Figure 12 Vent termination minimum clearances
Optional Snorkeling
Part Number
550-142-780/0712
12.
Canadian installations - See
Bl49.
1 or
Bl49.2
Installatio n Code. Tem1inate vent no less than 6
feet from another combustion air inlet, 3 fe. e t from
any other building opening, and 3 feet fro m any gas
service regulator.
13. See Figure 12, showing that the vent must temli-
nate:
more than
4
feet below or to side of all doors
or windows.
more than
I
foot above grade or anticipated
snow line.
at least 7 feet above public walkway.
3 feet above any forced air intake within I 0
feet.
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.
IS. Site conditions may dictate greater clearances.
16. Do no t extend exposed vent pipe outside of building
more than 4 feet.
Condensate could freeze and block vent pipe.
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WARNING!
A gas vent extending through an
exterior wall shall notterminate ad-
jacent to the wall or below building
extensions such as eaves, parapets,
balconies o r decks. Failure to com-
ply could result in severe personal
injury, death or substantial property
dan1age.
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