DuraVent Type B Gas Vent - Manual (Page 18)

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for example), the halogenated compounds
get into the combustion air. When they are
burned, they form compounds that cause
corrosion. The corrective action in this case, is
to isolate the appliance, and get the air supply
from outside, or an uncontaminated area.
(b) condensate may be caused by incorrect
sizing of the vent system. Follow the
procedures in the various sizing publications
to obtain the correct sizes for connectors
and vents. Other causes are: excessive
lateral runs, too many elbows, cold attics and
crawl spaces, and large areas of the exterior
portions of the venting system exposed to cold
weather. as a general rule, laterals should
be held to a minimum, and be no longer than
75% of the vertical height of the system.
condensate may initially appear as beads on
the outside of the connector or vent.
7. Construction. Laterals, offsets, and
vertical components should be securely
supported with wall straps, as previously
described. components of the vent which
are in occupied areas should be enclosed to
prevent accidental contact and damage to the
vent system. Ensure that insulation, building
materials, or debris do not extend into the
required clearance spaces. In cold climates,
the exterior portions of the vent should be
enclosed in a chase. Outside portions of the
vent system with may be painted with high
temperature paint to help prevent rusting and
corrosion on the exterior surfaces.
MAINTENANCE
1. an annual inspection is required to maintain
warranty of your DuraVent B-Vent system.
you will need to inspect the cap, Vent pipe,
connector pipe, and the connection to the
appliance.
2. Verify that the sealant around the Flashing
and Storm collar is intact. Reseal as needed.
Remove cap. Hold cap by the collar only, and
unlock by twisting counterclockwise, and then
pull up. Grabbing the cap by the outer edge
or top can cause damage to the cap.
3. Inspect cap for any physical damage or
damage from corrosion. Look for any foreign
material inside the cap or vent. (Example:
bird’s nest, leaves, etc.)
4. Shine a light down inside of the vent pipe.
Look for any evidence of damage, corrosion
or excessive condensation. also, look for
any disconnected sections of the vent pipe
or connector pipe. Refer to the installation
instructions to reconnect pipe sections. If pipe
sections are damaged or corroded, replace
immediately!
5. Replace cap by grabbing cap (by collar
only), and slide onto pipe section and twist-
locking (clockwise).
6. Inspect appliance connector and make
sure that the vent is securely connected to the
appliance.
7. Damaged or corroded parts should be
replaced immediately! Failure to do so can
lead to an extremely hazardous situation!
8. Follow your appliance manufacturer’s
recommended instructions for inspection your
appliance.