Step 7 - Make Outdoor-Air Inlet Adjustments; Manual Outdoor-Air Damper; Step 8 - Install Outdoor-Air Hood; Step 9 - Install All Accessories - Carrier 50HJQ014 Installation, Start-Up And Service Instructions Manual

NOTE: The disconnect takes the place of TB-1 as shown on the unit
wiring diagram label and the component arrangement label.
Fig. 13 — Optional Non-Fused Disconnect Wiring
Step 7 — Make Outdoor-Air Inlet Adjustments
MANUAL OUTDOOR-AIR DAMPER — All units (except
those equipped with a factory-installed economizer) have a
manual outdoor-air damper to provide ventilation air. Damper
can be preset to admit up to 25% outdoor air into return-air
compartment. To adjust, loosen securing screws and move
damper to desired setting. Then retighten screws to secure
damper (Fig. 14).
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 economizer.
NOTE: The hood top panel, upper and lower filter retainers,
hood drain pan, and filter support bracket are secured opposite
the condenser 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 re-
tainer, and hood drain pan (Fig. 17).
3. Secure lower filter retainer and 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 cre-
ated by lower filter retainer and filter support bracket.
Step 9 — Install All Accessories —
factory-installed options have been adjusted, install all field-
installed accessories. Refer to the accessory installation instruc-
tions included with each accessory.
MOTORMASTER® I CONTROL INSTALLATION
6T3 4T2 2T1 LOAD
Install Field-Fabricated Wind Baffles — Wind baffles must
be field-fabricated for all units to ensure proper cooling cycle
operation at low ambient temperatures. See Fig. 18 for baffle
details. Use 20-gage, galvanized sheet metal, or similar
corrosion-resistant metal for baffles. Use field-supplied screws
to attach baffles to unit. Screws should be
5
/ -in. long. Drill required screw holes for mounting baffles.
8
5L3 3L2 1L1 LINE
Fig. 15 — Outdoor-Air Hood Component Location
After all the
10
Fig. 14 — 25% Outdoor-Air Section Details
Fig. 16 — Seal Strip Location
(Air Hood Cross-Sectional View)
1 / -in. diameter and
4