Reznor PDH Option - Installation - Venting Instructions - Manual (Page 4)

Form I-PDH-V, PN 211409R2, Page 4
Venting Requirements (cont’d)
FIGURE 2 - Horizontal Vent Terminal ( NOTE: Read all measurements; drawing is not proportional.)
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” (152 mm)
Minimum
Wall
Roof or Building Overhang
3 ft (1M)
Minimum
PDH Sizes 75-225
4 ft (1.2M) minimum;
PDH Sizes 250-400A
6 ft (1.8M) minimum
Reznor (Option CC1)
or Equivalent Vent Cap -
Note positions of vent
cap openings (shaded
areas).
Parapet or
Adjoining Building
Vent Pipe Run
(Comply with
Requirements
No. 1 and 2
on pages 1-2.)
*Follow the instructions in Addendum pages 5-6, to join the double-wall vent terminal
section to a single-wall vent pipe run and to the vent cap. If vent run is Category III,
make secure,sealed joint that best suits type of Category III pipe being used.
6” (152mm) Minimum
*Double-Wall (Type B)
Vent Pipe
*Follow the instructions in Addendum pages 5-7, to join the double-wall vent terminal
section to a single-wall vent pipe run and to the vent cap. If vent run is double-wall (Type
B), join to terminal section following pipe manufacturer’s instructions. If vent run is
Category III, make secure, sealed joint that best suits type of Category III pipe being used.
Roof -
pitched
from
0 to 45°
Approved clearance thimble is required
when flue pipe extends through combustible
materials. Follow the requirements of 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
(field supplied)
6” (152mm) minimum
Parapet or
Adjoining Building
PDH Sizes 75-225
4 ft (1.2M) Minimum;
PDH Sizes 250-400A
6 ft (1.8M) Minimum
*Double-Wall
(Type B) Vent Pipe
Reznor (Option CC1)
or equivalent vent cap
Vent Pipe (Comply with Requirements
No. 1 and No. 2 on pages 1- 2.)
FIGURE 3 - Vertical Vent Terminal ( NOTE: Read all measurements; drawing is not proportional.)
Vertical Vent Terminal