Carrier 50HJQ004-007 Installation, Start-Up And Service Instructions Manual page 13

Fig. 13 — Horizontal Discharge Block-Off Plate
U-SHAPED ECONOMIZER
HOLE CONTROL ECONOMIZER
BOARD PLUG
(NOT
SHOWN)
WIRING
HARNESS
Fig. 14 — Durablade Economizer Installed in Unit
Example:
Given — Negative Pressure . . . . . . . . . . . . . . . . . . . . . . 0.2 in. wg
Outdoor Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .900 cfm
Determine — Setting = 5 in.
Fig. 15 — Durablade Economizer
Minimum Position Setting
BLOCK-OFF PLATE
ECONOMIZER TOP
MOTOR SCREW
BAROMETRIC
RELIEF DAMPER
SHIPPING
SCREW
POSITION SETTING
BRACKET
TOP
OUTSIDE AIR
SCREEN
ENTHALPY
CONTROL
HOOD
Fig. 16 — Outdoor-Air Thermostat/Enthalpy
Control Installation
13
OAT
(TERMINALS ARE UP)
UNIT