Columbia CDVB-100, Инструкция по установке, эксплуатации и обслуживанию, Страница: 24 / 44

24
VERTICAL VENT PIPE INSTALLATION INSTRUCTIONS
• Do not connect boiler to any portion of vent system
which operates under positive pressure. Positive
pressure will result with CATEGORY III or IV appliances
connected to vent.
• Do not connect vent connector to chimney flue serving a
fireplace.
E. VERTICAL VENT OR CHIMNEY
• Vents and chimneys usually extend vertically with
offsets not exceeding 45-degrees. Consider vent pipe
runs more than 45-degrees as horizontal runs. Include
their length in total horizontal run.
• Designer and installer must provide appropriately sized
common vent for all appliances connected to it. (Ref. to
figure 17, on page 17 or the latest revision of the NFGC)
• Connect this CATEGORY I boiler only to vent systems
with other CATEGORY I appliances.
!
WARNING
Do not connect CATEGORY I boiler to vent
system used by CATEGORY III and IV
appliance. Do not connect it to vents with
mechanical draft systems operating at positive
pressure. Improper venting could allow
combustion products to collect in structure
during use, resulting in damage, injury or
death.
F. CHIMNEY LINING
• Use suitably sized Type B1 vent liner or suitable
corrigated liner. See figure 17 page 24.
!
WARNING
Support vent liner in masonry chimney.
Maintain at least 1" clearance on all sides
to reduce possibility of condensate in vent.
Condensate may cause vent to deteriorate
allowing combustion products to collect in
structure, which could result in injury or
death. See figure 17 page 24.
!
WARNING
Vent liner must not block opening where other
appliance's vent connectors enter chimney.
Blocked openings will cause combustion
products to collect in structure, resulting in
damage, injury or death.
!
WARNING
Do not use unlined masonry chimneys. These
increase risk of condensate formation, which
may cause chimney to deteriorate, allowing
combustion products to collect in structure,
resulting in damage, injury or death.
G. VENT TERMINATION
• Terminate all vertical vents with a listed vent cap or roof
assembly unless local codes require otherwise.
• See vent cap or roof assembly manufacturer’s
instructions.
• Locate vent termination (vent cap or roof assembly) in
an area without positive pressures or eddy currents.
Eddy currents occur when air swirls over roof peaks.
They cause down-drafts and adversely affect vent
operation. See figure 19 page 24.
• Some vent terminations or caps protect against eddy
currents and down-drafts. Consult their manufacturer’s
instructions.
• Vent terminations or caps should usually be at least
the same size as the vent. They may be larger if the
installation warrants.
• Vent systems must end at least five feet above the
highest gas appliance connection.
• Vent pipe must extend at least three feet above the
point where it passes through the roof.
• Vent termination must be at least two feet higher than
any portion of building within ten feet horizontal and
vent termination must be at least two feet higher than
roof peaks within ten feet horizontal. See figures 20
and 21 page 24 .
• Some vent cap manufacturers offer vent caps that allow
reduced clearances. Consult their instructions.
!
WARNING
Failure to properly terminate vent chimney
systems could allow combustion products
to collect in structure, resulting in injury or
death.
• Terminate venting system at least three feet above any
forced-air building inlet within ten feet. Consider doors,
windows and gravity air building inlets. Locate vent
termination at least four feet below, four horizontal feet
from or one foot above any of these openings.