Reznor UDBP Option - Installation - Power Venting - Manual (Page 8)

Form I-UD-V-PV, Page 8
3.7 Vent Terminal (cont’d)
Commercial/Industrial Installation
Models UDAP and UDBP - ALL Sizes
FIGURE 3 - Horizontal Vent Terminal - Commercial/Industrial Installation
( NOTE: Read all measurements; drawing is not proportional.)
TABLE 6 - Horizontal Vent
Terminal Clearances
A Reznor ® Option CC1 vent cap is
required. Maintain a clearance of 6 to
12 inches (152-305mm) 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*,
U.S. - 4 ft (1.2M) horizontally
Gas regulator * U.S. - 3 ft (0.9M)
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.
Approved clearance thimble is required when flue pipe extends through combustible
materials. Follow the requirements of the thimble and/or the vent pipe manufacturer.
Pitch flue pipe down
toward outlet 1/4” per foot
for condensate drainage.
(NOTE: Slope applies to
entire horizontal vent run.)
6” to 12”
(152 to 305 mm)
Wall
Roof or Building Overhang
3 ft (1M)
minimum
6 ft (1.8M) minimum
Reznor (Option CC1)
or Equivalent Vent
Cap - note positions
of vent cap openings
(shaded areas)
Parapet or
Adjoining Building
Double-Wall* Vent Pipe
Vent Pipe
(Comply
with Re-
quirements
in 3.1 & 3.2
on page 6.)
*Follow the instructions in Addendum Section A, page 10,
to join a double-wall vent terminal section to a single-wall
vent run and to the vent cap.
6” (152mm) minimum
3. Venting Requirements and Instructions - Commercial/Industrial Installation
- applies to ALL Sizes of Models UDAP and UDBP (cont’d)