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Form I-CAUA, P/N 164771 R8, Page 12

FIGURE 5 - Concentric Adapter Box Description, Dimensions, and Airow

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View of Vent Terminal

Connection Side

Concentric

Adapter Box

Airow

Collar for connecting

indoor portion of the

combustion air pipe

Opening for double-wall vent

pipe to pass through the box.

Collar for attaching

outside concentric

portion of the

combustion air pipe

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Concentric

Adapter Box

Dimensions

All separated combustion installations require a concentric adapter box as illustrated

in FIGURE 5.

The concentric adapter box is included in the vent/combustion air kit. Installation

instructions depend on whether the vent system is horizontal (Option CC6) or vertical

(Option CC2).

8) Concentric Adapter Box

View of Heater Connection Side

When vent pipe diameters differ, join the pipes with a taper-type reducer. Refer to FIG-

URE 6A, 6B, or 6C for pipe connection requirements at the concentric adapter box.

Do NOT make actual connections until after reading the instructions and length require-

ments for installing the vent/combustion air kit. The connection requirements are

the same for both vertical and horizontal systems, but pipe length requirements

vary.

6.0 Mechanical

(cont'd)

6.2 Venting and

Combustion Air

(cont'd)

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 43 44

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