Trane Technologies IntelliPak Signature SCWF Installation, Operation And Maintenance Manual page 70

Controls
• The outside air damper closes
• The SERVICE light at the remote zone sensor option
turns on.
• A LEATPD diagnostic displays at the human interface
panel.
If the LEATPD is on a water-cooled unit without factory-
installed heat, it is wired to the WSM. It will trip if the
entering water temperature falls to 34°F, open the
economizer valve, and energize the pump output.
High Duct Temp Thermostat Option On Units
with a TCI
The high duct temperature thermostats are binary input
devices used on units with a Trane communication
interface module (TCI).They provide a high limit unit
shutdown and require a manual reset. The thermostats are
factory set to open if the supply air temperature reaches
240°F, or the return air temperature reaches 135°F. Once
tripped, the thermostat requires a manual reset. Reset by
70
pressing the sensor's reset button when the air
temperature decreases approximately 25°F below the
cutout point.
Filter Switch
A binary input device that measures the pressure
differential across the unit filters. It is mounted in the filter
section and is connected to the RTM. A diagnostic
SERVICE signal is sent to the remote panel if the pressure
differential across the filters is at least 0.5" w.c. The
contacts will automatically open when the pressure
differential across the filters decrease to 0.4" w.c. The
switch differential can be field adjusted between 0.17" w.c.
to 5.0" w.c. ± 0.05" w.c.
High Duct Static Switch Option
The high duct static switch is field-mounted in the ductwork
or plenums with smoke dampers. It will cause a manual
reset diagnostic if the duct static exceeds the pre-set static
limit. The static limit is adjustable at the HI.
SCXF-SVX01T-EN