Bryant DURAPAC PLUS SERIES 542J User Manual

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VII. STEP 7 — MAKE OUTDOOR-AIR INLET ADJUSTMENTS

A. Manual Outdoor-Air Damper

All units (except those equipped with a factory-installed
EconoMi$erIV) have a manual outdoor-air damper to provide
ventilation air. Damper can be preset to admit up to 25% out-
door air into return-air compartment. To adjust, loosen
securing screws and move damper to desired setting. Then
retighten screws to secure damper (Fig. 14).

VIII. STEP 8 — INSTALL OUTDOOR-AIR HOOD

IMPORTANT:

If the unit is equipped with the optional

EconoMi$erIV component, move the outdoor-air tempera-
ture sensor prior to installing the outdoor-air hood. See the
Optional EconoMi$erIV section for more information.

The same type of factory-installed hood is used on units with
25% air ventilation and units with an EconoMi$erIV.

NOTE:

The hood top panel, upper and lower filter retainers,

hood drain pan, and filter support bracket are secured oppo-
site the outdoor coil end of the unit. The screens, hood side
panels, remaining section of filter support bracket, seal strip,
and all other hardware are in a package located inside the
return-air filter access panel (Fig. 15).

1. Attach seal strip to upper filter retainer. See Fig. 16.

2. Assemble hood top panel and side panels, upper filter

retainer, and hood drain pan (Fig. 17).

3. Secure lower filter retainer and long section of filter

support bracket to unit. See Fig. 17.

4. Loosen sheet metal screws for base unit top panel

located above outdoor-air inlet opening, and remove

screws for hood side panels located on the sides of the
outdoor-air inlet opening.

5. Match notches in hood top panel to unit top panel

screws. Insert hood flange between unit top panel
flange and unit. Tighten screws.

6. Hold hood side panel flanges flat against unit, and

install screws removed in Step 4.

7. Insert outdoor-air inlet screens and spacer in channel

created by lower filter retainer and filter support
bracket.

8. Attach remaining short section of filter support

bracket.

IX. STEP 9 — INSTALL ALL ACCESSORIES

After all the factory-installed options have been adjusted,
install all field-installed accessories. Refer to the accessory
installation instructions included with each accessory.

Fig. 14 — 25% Outdoor-Air Section Details

Fig. 15 — Outdoor-Air Hood Component Location

Fig. 16 — Seal Strip Location

(Air Hood Cross-Sectional View)

NOTE: The outdoor-air hood comes with a baffle which is not used on
these units. Discard the baffle.

Fig. 17 — Outdoor-Air Hood Details

HOOD TOP
PANEL

HOOD SIDE
PANELS (2)

LOWER
FILTER
RETAINER

FILTER SUPPORT
BRACKET

HOOD DRAIN PAN

UPPER FILTER RETAINER

LOWER FILTER
RETAINER

FILTER SUPPORT
BRACKET