Reznor CAUA Unit Installation Manual User Manual

Page 9

Form I-CAUA, P/N 164771 R8, Page 9

Installation should be done by a qualified agency in accordance with these instruc-

tions. The qualified service agency installing the vent or vent/combustion air system is

responsible for the installation.
The venting or venting/combustion air systems illustrated in this manual are the only

ones approved for a Model CAUA heater.

Decide which Venting

System to Install:

Separated-Combustion -

A separated-combustion installation

requires a vent/

combustion air system that uses a power venter to

duct combustion air from out-

doors and exhaust flue products to the outdoors. A vent/combustion air kit, Option

CC2 or CC6, is required. Follow the instructions in Paragraph 6.2.1 beginning below.

Power-Vented -

A power-vented installation uses a power venter to draw

com-

bustion air from the indoor space and exhaust flue products to the outdoors. A vent

cap, Option CC1 or equivalent, is required. Follow the instructions in Paragraph 6.2.2,

beginning on page 20.



A minimum length of 12"

(305mm) of straight pipe

always required at

the venter outlet.

FIGURE 3 - Venter

Outlet and Combustion

Air Pipe Collars

Venter Outlet - 5 Sizes 150, 200, 250; 6 Sizes 300, 350,

400 -- 12 (305mm) of straight pipe is required at the outlet.

Use tin snips to cut

out the hole for the

combustion air pipe.

Collar for connecting

combustion air pipe

5 Sizes 150, 200;

6 Sizes 250, 300,

350, 400.

2) Venter Outlet and

Combustion Air

Inlet

6.2.1. Venting and Combustion Air Requirements for a Separated Combustion Installation

(must use either Option CC2 or CC6)

All pipe is field supplied. Requirements are listed for both vent pipe and combustion

air inlet pipe.

Vent Pipe

1) Type of Pipe

• Vent pipe approved for a Category III appliance

OR single-wall, 26-gauge or

heavier galvanized (or a material of equivalent durability and corrosion resistance)

vent pipe is

required between the heater and the concentric adapter box.

• Double-wall (Type B) vent pipe is

required for the vent terminal section. The length

of pipe that extends through the box and runs concentric through the combustion

air pipe

must be one-piece with no joints.

• Sealed, single-wall galvanized combustion air pipe is recommended.

Combustion Air Pipe

TABLE 6 -

Venter and

Inlet Collar

Sizes

Use tin snips or aviation shears to cut out the hole in the top of the heater (See

FIG-

URE 3). Insert the pipe down through the hole and attach it to the collar inside the

heater. Seal the joint. (Larger size heaters have oval collars. If the collar is oval, form

the pipe to fit the collar.)

Combustion

Air Inlet Collar

Size

150

200

250

300

350

400

Venter

Outlet

inches

127

152

Combustion

Air Inlet

inches

127

152