Bryant 551B Series Installation, Start-Up And Service Instructions Manual page 14

Fig. 14 — Outdoor-Air Hood Details
Fig. 15 — Varislide™ Economizer Installed in Unit
ECONOMIZER
CONTROL
BOARD
WIRING
HARNESS
BAROMETRIC
RELIEF
DAMPER
ECONOMIZER
MOTOR
Fig. 16 — Horizontal Varislide Economizer Installation
Example:
Given —
Negative Pressure . . . . . . . . . . . . . . . . . . . . . . . . 0.2 in. wg
Outdoor Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 cfm
Determine —
Setting = 5 in.
Fig. 17 — Varislide Economizer Minimum
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Position Setting