Installation manual

PART 6: VENTING, COMBUSTION AIR & CONDENSATE REMOVAL (CONTINUED)
D. EXHAUST VENT AND INTAKE AIR VENT
PIPE LOCATION
Please refer to chart below for U.L.-approved
stainless steel adapters and terminations.
1. Determine exhaust vent location:
• Total length of vent may not exceed the
limits specified in the venting Sizing
Section.
• The vent piping for this boiler is approved
for zero clearance to combustible
construction.
• See illustration within this section of
clearances for location of exit terminals of
direct-vent venting systems.
• Avoid terminating exhaust vent near
shrubs, air conditioners or other objects
that will obstruct the exhaust stream.
• The flue products coming from the
exhaust vent will creat a large plume
when the boiler is in operation. Avoid
venting in areas that will affect
neighboring buildings or be considered
objectionable.
• The boiler vent system shall terminate at
least 3 feet (0.9 m) above any forced air
intake located within 10 ft (3 m). Note:
this does not apply to the combustion air
intake of a direct-vent appliance.
• Provide a minimum of 1 foot distance
from any door, operable window, or
gravity intake into any building.
• Provide a minimum of 1 foot clearance
from the bottom of the exhaust above the
expected snow accumulation level. Snow
removal may be necessary to maintain
clearance.
• Provide 4 feet horizontal clearance from
electrical meters, gas meters, gas
regulators, relief equipment, exhaust fans
and inlets. In no case shall the exit
terminal be above or below the
aforementioned equipment unless the 4
foot horizontal distance is maintained.
• Do not locate the exhaust over public
walkways where condensate could drip
and/or freeze and create a nuisance or
hazard.
• When adjacent to a public walkway,
locate exit terminal at least 7 feet above
grade.
• Do not locate the exhaust directly under
roof overhangs to prevent icicles from
forming.
• Provide 6 feet clearance from the inside
corner of vertical walls, chimneys, etc., as
well as horizontal corners created by roof
overhangs.
2. Determine air intake vent location.
• Provide 1 foot clearance from the bottom
of the intake air vent and the level of
maximum snow accumulation. Snow
removal may be necessary to maintain
clearances.
• Do not locate intake air vent in a parking area
where machinery may damage the pipe.
• Follow required minimum clearances
located in Fig. 6-3, 6-4, 6-5.
3. Determine location of Condensate Piping
This boiler is a high efficiency appliance,
therefore the boiler produces condensate.
Condensate is a by-product of the boiler
combustion process. A condensate
collection system with an internal float switch
n
WARNING
You must not use “B” Vent in an exhaust
application. ‘B’ vent is for intake applications
only. Failure to do so will result in serious injury
or death.
n
WARNING
Both exhaust and intake air vents must exit
from the same side of the building to assure
correct appliance operation.
n
WARNING
You must insert the provided intake and exhaust
screen at your vent terminations to prevent
blockage caused by birds or debris.
GAS-FIRED HOT WATER SUPPLY BOILER Boiler Manual
30