NOTE: Top/rear dampers shown. For both top/rear and bottom/rear
dampers, adjust the connecting rod so that one damper is closed when
the other is open.
OUTDOOR AIR DAMPER
(CW OPENING)
PARALLEL AXIS
BETWEEN
DAMPERS
RETURN AIR
DAMPER
(CW OPENING)
30 DEGREES CW
FROM PARALLEL
AXIS
ACTUATOR
MIXING BOX
30 DEGREES CCW
FROM PERPENDICULAR
AXIS
CONNECTING ROD
TYPICAL DAMPER
SECONDARY LINKAGE
TYPICAL DAMPER SECONDARY LINKAGE
LEGEND
CCW — Counterclockwise
CW — Clockwise
Fig. 36 — Mixing Box/Filter Mixing Box, Typical Damper Arrangement
Fig. 37 — Mixing Box/Filter Mixing Box, Sizes 07-21 —
Typical Damper Arrangement (Top and Rear)
46
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