Weil-McLain GOLD CGs - Manual (Page 11)

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Part Number 550-141-873/0502 11
Follow instructions on this page
when determining vent location to
avoid possibility of severe personal
injury, death or substantial property
damage.
6. Vertical direct vent — vent termination
1. Locate the boiler and vent penetration through the
roof so all requirements on this page will be met.
Also follow vent manufacturer’s instructions.
2. Gases will form white plume in winter. Plume could
obstruct window view of nearby windows in multi-
story buildings.
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 freezeup.
4. Locate or guard vent termination to prevent
condensate from damaging exterior surfaces.
5. Locate the vent termination well away from trees,
shrubs, and decorative items.
6. Locate or guard vent to prevent accidental contact
by people or pets.
7. Do not terminate vent in window well, stairwell,
alcove, courtyard, or other recessed areas.
8. Do not wrap or insulate vent pipe or fittings.
9. Do not connect:
• Any other appliance to vent pipe.
• Multiple boilers to a common vent pipe.
10. Canadian installations — See B149.1 or B149.2
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.
11. The vent must terminate:
• more than 1 foot below or to side of all doors
or windows.
• more than 1 foot above grade or anticipated
snow line.
• 3 feet above any forced air intake within 10
feet.
12. 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.
13. Site conditions may dictate greater clearances.
Do not terminate the vent adjacent
to a wall or below any building
extension such as eaves, parapets,
balconies or decks. Failure to
comply could result in severe
personal injury, death or substantial
property damage.
14. Multiple boilers may be vented with vent
terminations at the same height. Space
terminations to provide a minimum of 1 foot
between pipes for U.S. installations. For Canadian
installations, provide clearances required by
B149.1 or B149.2 Installation Code.
7. Installation guidelines
1. Codes — Install vent and combustion air piping in
compliance with all applicable national, state, local
or provincial codes.
2. Do not connect:
• Any other appliance to combustion air or vent
piping.
• Any other appliance into or through chimney
when using existing chimney as raceway.
• Multiple boilers into common vent.
3. Vent length limits — Position boiler as close as
possible to vertical vent/air run. Do not exceed vent
length limits given in Section 8 of this supplement.
B-vent limit is 30 feet. Vent or air max. lengths are:
• CGs-3 & CGs-4: Max 55 equivalent feet
• CGs-5 & CGs-6: Max 45 equivalent feet
4. Materials and construction —
• Seal all B-vent combustion air joints with
approved silicone sealant (Dow Corning 700™
or 732™, General Electric 108 or 800, or sealant
specified by vent pipe manufacturer.
B-vent
sections must be straight — no elbows .
• Construct vent joints per vent manufacturer’s
instructions, including use of their specified
sealant. Vent pipe routed inside B-vent must
also be fitted with vent clamps with elastomer
grippers, installed per
section 9 of this
supplement.
• Use only one of the approved vent systems listed
in Table 2. Do not mix types of vent material.
CSA certification will be void.
5. Install boiler per CGs Boiler Manual.