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Vent piping outside the Building is permitted under the following conditions:
1. The maximum length outside the building is 20 feet.
2. Only 3” pipe can be used.
3. All normal termination clearances
are maintained.
4. All exterior exhaust vent pipes are
insulated with 3.5”-ID, ½”-thick
Closed Cell Foamed Polyolefin
Tubing
i.e., “
Tundra Seal Plus”
or
equivalent.
5. The pipe is supported every 24”
6. The exhaust and inlet are sloped
back to the boiler ½ ” elevation for
every foot.
4.0 CONDENSATE DRAIN
This unit produces water as a
product of combustion. Much of this
water condenses on the heat
exchanger and in the venting
system. All exhaust piping must be
on a slope back to the boiler ¼” per
linear foot of vent. Steps must be taken to ensure that condensate does not collect in the venting
system. Condensate must be drained from the boiler into a household drain.
Note: check with your municipality, or local gas company to determine if disposal of combustion
condensate is permitted. In the State of Massachusetts the condensate must be neutralized
prior to entering a drain.
The following are important notes that must be taken into
consideration when constructing the condensate system:
•
DO NOT
run condensate line outside. A frozen or blocked
drain will cause the condensate to fill the combustion
chamber. This will result in a no heat condition, as the unit
will shut down, and damage to the flame sensor, and
components can occur.
•
NEVER
use copper, steel, or galvanized piping in the
construction of the condensate system.
•
When a condensate pump is used or required, select a
pump that is designed for residential furnaces.
Warning
Failure to properly connect the condensate
line will cause combustion gases to enter the
room, possibly causing serious injury to
occupants or death.
Insulation
“Tundra Seal
Plus” 3.5” ID. ½”
thick
Supports every 24”
12” plus
allowance
above grade
Exhaust
Inlet
Maximum of 20 feet is
permitted for outside a
building using 3” pipe
ONLY.
Apply plate here
Gas Vent Directly Below
Keep Free of Obstructions
Condensate
from Boiler
Bottom
Panel
Condensate
Trap & drain
Condensate drain
pipe must
not
be
sealed to allow
overflow, if blocked.
Condensate
Siphon