Typical Access Panel Locations; Outdoor-Air Hood Details; Horizontal Durablade Economizer Installation; Horizontal Discharge Block-Off Plate - Carrier 48HJD005-007 Installation, Start-Up And Service Instructions Manual

9. Replace outdoor-air opening panel using screws from
Step 2. Replace filter access panel. Ensure the filter ac-
cess panel slides along the tracks and is securely engaged.
10. Fasten hood top and side plate assembly (Fig. 14) to
outdoor-air opening panel with screws provided.
11. Place knob supplied with economizer on OAT. See
Fig. 20. Set for 3° F below indoor room thermostat set-
ting. If accessory enthalpy control (EC) is used in place of
OAT, see instructions shipped with EC for installation
and adjustment. See Fig. 20.
12. Connect OAT per Fig. 21.
13. Slide outdoor-air inlet screen into screen track on hood
side plate. While holding screen in place, fasten screen re-
tainer to hood using screws provided.
NOTE: Refer to Fig. 22 for economizer barometric relief
damper characteristics.
FILTER
ACCESS
PANEL
Fig. 13 — Typical Access Panel Locations
Fig. 14 — Outdoor-Air Hood Details
COMPRESSOR
OUTDOOR-AIR
ACCESS
OPENING
PANEL
ECONOMIZER ECONOMIZER
CONTROL BOARD PLUG
SHIPPING
SCREW
Fig. 15 — Durablade Economizer Installed in Unit
ECONOMIZER
CONTROL
BOARD
BAROMETRIC
RELIEF
DAMPER
ECONOMIZER
PLUG
ECONOMIZER
MOTOR
Fig. 16 — Horizontal Durablade Economizer
Fig. 17 — Horizontal Discharge Block-Off Plate
13
ECONOMIZER TOP
MOTOR SCREW
Installation
BLOCK-OFF PLATE