10 18-HD66D1-4
Discharge
Temp
Sensor
6” Min.
2” Min.
6” Min.
Static
Pressure
Probe
(Supply)
Static
Pressure
Probe
(Return)
Mount Supply Air and Return Air Static Pressure Probes
OPTIONAL: Static Pressure probes
are only required when using Auto Zone
Sizing.
The supply static pressure sensor must
be mounted a minimum of 6” above the
unit cabinet and the return probe must
be mounted a minimum of 6” below the
unit cabinet. Additional distance from
the cabinet is preferred when possible.
Mount the probes in a central area
of duct away from turns, transitions,
take offs or other areas of potential
turbulence.
Drill a hole of 1/4” minimum to accept
the Static Pressure probes.
Insert and mount the sensor as
shown. Insulate the sensor to prevent
condensation.
NOTE: The static probes are used for
Automatic Zone Sizing and are placed
outside the Coil and Electronic Air
Cleaner (if used). The static pressure
reading references external duct static;
not the overall system static imposed
upon the blower motor.
4
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