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WARNING:
▶ Improper venting of the GB162 boiler can result in
excessive levels of carbon monoxide which can
result in severe personal injury or death. The boiler
must be vented in accordance with the 'Venting of
Equipment' section of the latest edition of ANSI Z
223.1 / NFPA 54 Natural Fuel Gas Code and/or the
'Venting systems and air supply for appliances'
section of the latest version of CAN/CGA B149.1
Natural Gas and Propane Installation Code in Canada
and in accordance with all applicable local building
codes.
NOTICE
▶ To avoid moisture and frost build-up and to maintain
clearances to openings on adjacent homes, 45° and
90° elbows or tees may be attached to the end of the
vent termination pipe to direct exhaust plumes away
from the adjacent structure. The total allowable vent
length, maximum number of elbows and distance to
air intake restrictions must be adhered to.
6.9
Multiple boiler vent terminal clearance
Vertical terminations:
The combustion air inlet pipe must terminate in a downward position
using 2 × 90° elbows. The combustion air inlet pipe shall terminate at
least 3 ft (914 mm). horizontally from the center line of the exhaust
vent, this is to prevent cross contamination of flue gases into the
combustion air stream.
Terminate all exhaust vents at the same height and all combustion air
inlets at the same height, while maintaining the minimum 36" (914 mm)
height clearance from the exhaust to the down turned 90° elbow and
combustion air inlet.
Exhaust vent termination edge shall be at least 24" (610 mm) from the
edge of the air inlet pipe of an adjacent heater. Exhaust vent
terminations shall be placed at a minimum of 12" (305 mm) center to
center ( fig. 33 and fig. 34).
Air intake terminations may be placed adjacent to each other.
The combustion air inlet is part of the direct vent system and not
classified as a forced air inlet.
Logamax plus GB162-L.B. 80 kW / 100 kW – 6720645916 (2014/10)
Fig. 33 Vertical terminations
[1]
minimum 12" (305 mm)
[2]
minimum 36" (914 mm)
[3]
minimum 36" (914 mm)
[4]
minimum 12" (305 mm)
[5]
minimum 36" (915 mm)
[6]
minimum 24" (610 mm)
Horizontal terminations:
Combustion air inlet elbow must terminate at least 12"(305 mm) below
exhaust elbow or outlet, but not exceed 15" (381 mm) maximum
separation ( fig. 34).
Horizontal termination shall not extend beyond 18" from the building
(based on minimum 12" (305 mm) required separation between intake
and exhaust). Exhaust vent vertical rise shall not extend beyond 39"
(991 mm) from building penetration to termination elbow ( fig. 34).
Condensate could freeze and block vent pipe.
Terminate all exhaust vents at the same height and all combustion air
inlets at the same height, while maintaining the minimum 12" (305 mm)
vertical height clearance from between exhaust and combustion air
inlet. Exhaust vent termination edge shall be at least 12" (305 mm)
laterally from the edge of the air inlet pipe of an adjacent heater.
The combustion air inlet is part of the direct vent system and not
classified as a forced air inlet.
6
Installation
6 720 645 916-030.1N
23
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