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Form I-CAUA, P/N 164771 R8, Page 27

FIGURE 20 -

Dimensions of

Optional Mixing

Box - inches (mm)



















































Note: Damper

frame ts in the inlet

opening.

TABLE 20 - Mixing Box

Dimensions - inches (mm)

CAUA

Size

150, 200

250, 300,

350, 400

A 38 (965) 50 (1270)

B 22-3/4 (578) 36-1/2 (927)

C 7-5/8 (194) 6-3/4 (171)

A discharge plenum adds 49-15/16" (1268mm) to the height of the heater. (If installing

Option CD62, this height includes the cooling coil.)

The optional mounting base is designed to support a Model CAUA 350 or The optional

mounting base is designed to support a Model CAUA 350 or 400 heater while providing

an inlet for return air. The mounting base is designed to be used with an optional dis-

charge plenum (Paragraph 6.4.1) creating a "packaged stand-alone" heating or heat-

ing/cooling upow system which can be used in an air turnover application.

However, if the installation requires it, the mounting base may also be used with dis-

charge ductwork.

The mounting base has guarded openings on all four sides and is available with

optional 1" at disposable, 1" permanent aluminum, or 1" pleated disposable lters.

The base is designed for a fairly open area and must have at least three of the four

sides open.

The base adds 36-1/2" (927mm) to the overall height.

6.3.3 Inlet Base, Option AVA (Sizes 350 and 400 only)

Inlet

Base

CAUA

Discharge

Plenum

FIGURE 21 - Inlet Base

and Discharge Plenum

Options

The discharge duct connects to the top of the heater or to the outlet of the optional

cooling coil cabinet. See FIGURES 22A and 22B. Connect the ductwork plenum to the

duct ange as illustrated in FIGURE 22B.

1) The duct connection on the top of the heater has a 90° ange.

2) The duct may either have no ange or a 90° ange.

3) Position ductwork around the outside of the heater ange.

4) If the ductwork has a ange, drill holes vertically through duct ange into the top

of the heater and secure with sheetmetal screws. If the ductwork does not have

a ange, drill holes horizontally through the ductwork and the heater ange;

secure with sheetmetal screws.

6.4.1 Discharge Duct Connection

6.4 Discharge Air

Installation NOTE: If being

installed as a makeup

air unit with two-stage

control (Option AG3),

see Paragraph 6.4.3 for

instructions on installing the

duct sensor.

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 43 44

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