Bryant 551B Series Installation, Start-Up And Service Instructions Manual page 16

7. Determine the enthalpy changeover set point from
Fig. 22. The enthalpy changeover set point should be
set to return the outdoor air damper to the minimum
position when enthlapy rises above the set point. The
settings are A, B, C, and D. Set the enthalpy change-
over per the setting in Fig. 22.
8. Replace the outdoor-air opening panel using screws from
Step 2. Replace filter access panel. Ensure the filter
access panel slides along the tracks and is securely en-
gaged. See Fig. 23.
9. Fasten hood top and side plate assembly (Fig. 24) to
outdoor-air opening panel with screws provided.
10. Slide outdoor-air inlet screen into screen track on hood
side plate. While holding screen in place, fasten screen
retainer to hood using screws provided. See Fig. 25.
Fig. 21 — PARABLADE Economizer Installed in Unit
CONTROL POINT
CONTROL
(APPROX. DEG.)
CURVE
AT 50% RH
A 73 (23)
B 70 (21)
C 67 (19)
D 63 (17)
Fig. 22 — Enthalpy Settings For PARABLADE Economizer
Fig. 23 — Panels Reinstalled on Unit
Fig. 24 — Outdoor-Air Hood Installed on Unit
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