Reznor LDAP Unit Installation Manual - Manual (Page 19)

Form I-LDAP, P/N 207733R6, Page 19
7) Vent Terminal (Pipe
and Vent Cap)
The vent terminal pipe must be either Category III vent pipe or double-wall
(Type B). Terminate the vent pipe with a Reznor Option CC1 vent cap. A differ-
ent style vent cap could cause nuisance problems or unsafe conditions. The
vent cap must be the same diameter as the vent pipe.
See FIGURE 11 for requirements of a vertical vent terminal. See FIGURE 12
and the clearance table for requirements of a horizontal vent terminal.
FIGURE 12 -
Horizontal Vent
Terminal
(NOTE: Read all
measurements; drawing
is not proportional.)
Vent Pipe
(Comply with
Requirements
1) and 2) on
pages 16-17.)
Horizontal Vent Terminal Clearances
A vent cap is required. Maintain a minimum
clearance of 12 inches (305mm) from the wall
to the vent terminal cap for stability under wind
conditions.
Products of combustion can cause discoloration
of some building finishes and deterioration of
masonry materials. Applying a clear silicone
sealant that is normally used to protect concrete
driveways can protect masonry materials. If
discoloration is an esthetic problem, relocate the
vent or install a vertical vent.
Structure
Minimum Clearances for Vent Termination
Location (all directions unless specified)
Forced air inlet within 10 ft (3.1M) 3 ft (0.9M) above
Combustion air inlet of another
appliance
6 ft (1.8M)
Door, window, or gravity air inlet (any
building opening)
4 ft (1.2M) horizontally
4 ft (1.2M) below
1 ft (305mm) above
Electric meter, gas meter*, gas
regulator*, and relief equipment
U.S. - 4 ft (1.2M) horizontally
Canada - 6 ft (1.8M) horizontally)
Gas regulator * U.S. - 3 ft (0.9M); Canada - 6 ft (1.8M)
Adjoining building or parapet 6 ft (1.8M)
Adjacent public walkways 7 ft (2.1M) above
Grade (ground level) 1 ft (305mm) above**
*Do not terminate the vent directly above a gas meter or service regulator.
** Consider local snow depth conditions. The vent must be at least 6” (152mm)
higher than anticipated snow depth.
FIGURE 11 - Vertical
Vent Terminal
(
NOTE: Read all
measurements; drawing
is not proportional.)
Roof -
pitched
from
0 to 45°
Approved clearance thimble is required
when flue pipe extends through combustible
materials. Follow the requirementsof the
thimble and/or the vent pipe manufacturer.
Vertical flue extension must
be 6” (152mm) higher than
anticipated snow depth but
no less than 2 ft (610mm) above
the roof.
Roof Flashing
6” (152mm) minimum
Parapet or
Adjoining Building
6 ft (1.8M)
minimum
Double-Wall* or Category III
Terminal Vent Pipe*
Reznor (Option CC1)
Vent Cap
Vent Pipe (Comply with Requirements
1) and 2) on pages 16-17.)
*Follow the instructions in Require-
ment 4), to join a double-wall vent
terminal section to a single-wall
vent run and to the vent cap.