McQuay RAH 047C Installation And Maintenance Manual page 43

Face and Bypass Dampers
Face and bypass dampers are available in a flat arrangement
for use with heating coils and standard face area cooling coils,
as well as a staggered arrangement for large face area cooling
coils. The damper sets are linked through a jack shaft for
connection to a single actuator (factory or field installed).
Figure 49: Face and Bypass Dampers, RDS 800C–802C Only
Face and
Bypass
Damper
Figure 50: Face and Bypass Dampers, Staggered Arrangement—RAH 047C–077C Only
Open
90°
Stroke
.25"
(6mm)
.75" (76mm)
(19mm)
McQuay IM 987
Closed
Airflow
3.00"
Mechanical Installation
Airflow
Face Dampers
Open
.75"
(19mm)
90°
Stroke
3.00"
(76mm)
Face Dampers
Closed
Face Damper
Bypass Damper
43