Reznor VR Option - Installation - Dual Vent Kit - Manual (Page 3)

Form RZ-NA-I-VR/TRPA-DV, P/N 120733 (Rev 3), Page 3
FIGURE 4A - Horizontal
Dual Vent Terminal
Concentric vent pipes, 4" inner
and 6" outer, are both single-wall
vent pipe.
FIGURE 3 - Attach 4" and
6" vent terminal pipes
concentrically
NOTE: Drawing
is not proportional;
read all dimensions.
Parapet or
Adjoining Building
Roof or Building Overhang
3 ft (.9M)
minimum
18” (457mm)
minimum 6” (152mm) minimum to combustible material
6 ft (1.8M)
maximum
6 ft (1.8M)
minimum
Approved clearance thimble is required
when flue pipe extends through combus-
tible materials. Follow the requirements
of the thimble and/or vent pipe manu-
facturer.
Pitch pipe down toward
outlet 1/4” per foot for
condensate to drain.
Dual Vent
Adapter
Box
12” (305mm) minimum
Following the same procedure, install any additional sections of 4" pipe. The
overall length of the 4"-diameter inner pipe must be at least 12" (305mm) longer
than the outer concentric pipe.
Slide the outer, 6"-diameter vent terminal pipe over the 4" pipe. Attach and se-
cure the 6" outer pipe to the collar on the adapter box using three non-corrosive
screws (the same as the 4" pipe) and seal the joint.
Follow the same procedure for additional joints.
3. Install the Dual Vent Adapter Box Indoors with Attached Concentric
Vent Pipe Exiting through the Roof or Wall
Follow the requirements in either FIGURE 4A or 4B to select a location for the
vent terminal.
Maintain a clearance of 18 inches (457mm) from the wall to the 6" 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 nor-
mally used to protect concrete driveways can protect masonry materials. If dis-
coloration is an esthetic problem, relocate the vent or install a vertical vent.
Horizontal Vent
Clearance Table
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 4 ft (1.2M) horizontally
(any building opening) 4 ft (1.2M) below
1 ft (305mm) above
Electric meter, gas meter **, 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
The vent must be at least 6" (152mm) higher than anticipated snow depth.
*If the heater is approved for installation with outside combustion air; see the heater
intallation manual (see References, page 1).
**Do not terminate the vent directly above a gas meter or service regulator.