Reznor UEAS Unit Installation Manual - Manual (Page 24)

THIRD, Attach the bird guard on the
exhaust (vent) terminal with the
sheetmetal screws provided.
FIRST, Install the
Combustion Air Inlet.
1) Slide the combustion air
inlet down over the vent pipe.
2) Fasten bottom of inlet to
the combustion air pipe with
sheetmetal screws. Be sure
not to penetrate the vent pipe.
SECOND, Slide the rubber rain cover
down over the end of the 4” vent pipe
until it is seated flush on the top of the
combustion air inlet. Do not seal
with silicone or tape.
FIGURE 19 - Install Combustion Air
Inlet, Rain Collar, and Bird Screen
Flashing
(field-supplied)
6” (152mm) -
Height of the
Concentric
Adapter Box
Wall or
Adjoining
Building
6 ft (1.8M) minimum
11” (279mm)
*18”
(457mm)
minimum
4 ft (1.2M)
maximum
Roof
*Inlet air cap must be at least 6”
higher than anticipated snow depth.
Use brackets and field-supplied
hardware to attach the
box to underside of roof.
12” (305mm) minimum
Cold Climate NOTE:
In geographic areas where
the design ambient is -10°F
or lower, this minimum
height is 24” (610mm).
2-5/16” (59mm)
Combustion
Air Pipe
Vent Pipe
Concentric
Adapter Box
Roof
Combustion
Air Inlets
Bird Guard installed
on the Vent (flue
exhaust) Terminal
Flashing
(field-supplied)
One piece, 4” dia,
Schedule 40,
CPVC or PVC
Vent Pipe
Verify that rain
collar is seated
properly.
Silicone Ring
FIGURE 20 - Typical Installation of a Model UEAS High Efficiency, Separated-Combustion
Unit with a Vertical Vent/Combustion Air Terminal (Option CC2)
Rear
View
Side View
Installation of the vertical vent and combustion air system on your separated-combustion unit is complete. Verify compli-
ance with all venting installation requirements, pages 12-17, and FIGURE 20.
7. Attach the indoor combustion air pipe. Use field-supplied
sheetmetal screws to attach the single-wall combustion air pipe
run to the collar on the concentric adapter box. Seal with tape
or sealant.
8. On the outside, install the combustion air inlet, the rain
collar, the bird screen, and field-supplied flashing.
8a) Slide the combustion air inlet over the vent pipe and fasten
the collar to the combustion air pipe with sheetmetal screws.
Seal the joint with tape or sealant. See FIGURE 19.
8b) To prevent rain water leakage, slide the rain collar over the
end of the 4” vent pipe and seat it flush on the top of combustion
air inlet. Do not use sealant.
8c) Attach the bird guard with the two sheetmetal screws pro-
vided (See FIGURE 19.
8d) On the outside (See FIGURE 18), flash the combustion air
pipe to the roof. Flashing is field-supplied.
7.2.3 VERTICAL VENT TERMINAL Installation (cont’d)
7.2 Venting and Combustion Air (cont’d) 7.0 Mechanical
(cont’d)
7.0 Mechanical
(cont’d)
Form I-UEAS, Page 24