14
Nondirect Vent Installation—Upflow Installations
■
Refer to appropriate tables for proper pipe size, vent length
and the number of elbows allowed.
■
Refer to “Materials” in “Plan Vent System” for the proper
venting material.
■
An inlet air restrictor plate found in the plastic bag containing
these Installation Instructions and the User’s Information
Manual must be installed in all nondirect vent installations.
See “Inlet Air Restrictor Plate” in “Venting Requirements.”
Attach a 90° elbow (not supplied) to the inlet coupler and
install the inlet air restrictor plate inside the elbow.
■
The flue pipe screen, designed to keep objects out of the flue
pipe (see “Flue Pipe Screen” in “Venting Requirements”),
should be installed at the termination of the flue pipe.
NOTE: Do not place an additional flue pipe screen in the
intake termination because the air intake may freeze shut.
Nondirect Vent—Upflow (Horizontal Venting)
Nondirect Vent Upflow (Vertical Venting)
A. Run pitch =
¹⁄₄
" (6.4 mm) per foot minimum
B. Flue pipe screen (inside flue pipe)
C. 6" (15.2 cm)
D. 12" (30.5 cm) minimum clearance. Adjust
height to expected snow level based on
local conditions.
E. Air intake pipe
F. Condensate collar
G. Inlet air restrictor
plate (inside
inlet coupler)
H. Flue pipe
(CLOSED)
DRAIN
HOLE
T
H
RU.
59.69/56.64
B
D
H
A
G
F
C
E
A. Flue pipe screen (inside flue pipe)
B. Storm collar
C. Flashing
D. Flue pipe
E. Air intake pipe
F. Inlet air restrictor plate (inside inlet
coupler)
G. Condensate collar
H. Run pitch =
¹⁄₄
" (6.4 mm) per
foot minimum
I. 12" (30.5 cm) minimum
clearance. Adjust height to
expected snow level based on
local conditions.
H
I
B
A
C
D
E
F
G
