Burnham 2PV Series Installation, Operating And Service Instructions page 14

h. Once the installation is complete, operate
appliance and inspect all joints to ensure that fl ue
gases and/or liquid condensate will not escape.
H.
Horizontal (Through Wall) Vent Installation.
1. Maintain minimum ¼ inch per foot slope in
horizontal runs. Slope pipe down toward vent
terminal. Position weld seams in vent pipes in all
horizontal runs at the top to avoid condensate from
lying on the seams.
2. Vent terminal location restricted per following:
a. Minimum 12 inches above grade plus normally
expected snow accumulation level, or 7 feet
above grade if located adjacent to public
walkway. Do not install over public walkway
where local experience indicates condensate or
vapor from Category III appliances creates a
nuisance or hazard.
b. Minimum 3 feet above any forced air inlet
located within 10 feet.
c. Minimum 4 foot below, 4 foot horizontally from,
or 1 foot above any door, window, or gravity air
inlet.
d. Minimum 4 feet (6 feet in Canada) horizontally
from, and in no case above or below, unless a
14
Figure 9: Recommendations for Thimble and Wall Penetration
4-foot horizontal distance is maintained, from
electric meters, gas meters, regulators and relief
equipment.
e. Minimum 12 inches from overhang or corner.
3. Use wall thimble when passing through combustible
outside wall (thimble use optional for
noncombustible wall). Insert thimble through wall
from outside. Secure outside fl ange to wall with
nails or screws, and seal with adhesive material.
Install inside fl ange to inside wall, secure with nails
or screws, and seal with adhesive material.
4. For noncombustible wall when thimble is not used
size opening such that female (bell) end with
locking band attached cannot pass through.
5. Join vent terminal to vent pipe. Locate vent
terminal 3 inches (minimum) and 6 inches
(recommended) from wall when joined to inside
vent piping. See Figure 9. Vent terminal clearance
to vinyl wall surfaces is 6 inches.
6. Insert vent pipe through thimble/opening from
outside and join to vent system. Apply sealant
between vent pipe and opening/thimble to provide
weathertight seal.