0 mechanical (cont’d) 7.0 mechanical (cont’d), 2 venting and combustion air (cont’d) – Reznor UEAS Unit Installation Manual User Manual

Page 24

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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

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