System Input Devices & Functions - Trane TC*150-301 Installation Operation & Maintenance

General Information
the closed position any time that power is lost to the unit. It is capable of delivering up to 25 inch
pounds of torque and is powered by 24 VAC.
RTCI -- ReliaTel™ Trane Communication Interface (Optional)
This module is used when the application calls for an ICSTM building management type control
system. It allows the control and monitoring of the system through an ICS panel.
The module can be ordered from the factory or ordered as a kit to be field installed. Follow the
installation instruction that ships with each kit when field installation is necessary.
RLCI - ReliaTel™ LonTalk Communication Interface (Optional)
This module is used when the application calls for an ICSTM building management type control
system that is LonTalk. It allows the control and monitoring of the system through an ICS panel.
The module can be ordered from the factory or ordered as a kit to be field installed. Follow the
installation instruction that ships with each kit when field installation is necessary.
RTOM – ReliaTel™ Options Module (Optional)
The RTOM monitors the supply fan proving, clogged filter, supply air temperature, exhaust fan
setpoint, supply air tempering, Frostat™ and smoke detector. Refer to system input devices and
functions for operation.
System Input Devices & Functions
The RTRM must have a zone sensor or thermostat input in order to operate the unit. The flexibility
of having several mode capabilities depends upon the type of zone sensor or thermostat selected
to interface with the RTRM.
The descriptions of the following basic Input Devices used within the RTRM network are to acquaint
the operator with their function as they interface with the various modules. Refer to the unit's
electrical schematic for the specific module connections.
The following controls are available from the factory for field installation.
Supply Fan Failure Input (Optional)
The Fan Failure Switch can be connected to sense indoor fan operation, FFS (Fan Failure Switch).
If air flow through the unit is not proven by the differential pressure switch connected to the RTOM
(factory set point 0.07 " w.c.) within 40 seconds nominally, the RTRM will shut off all mechanical
operations, lock the system out, send a diagnostic to ICS, and the SERVICE output will flash. The
system will remain locked out until a reset is initiated either manually or through ICS.
Clogged Filter Switch (Optional)
The unit mounted clogged filter switch monitors the pressure differential across the return air
filters. It is mounted in the filter section and is connected to the RTOM. 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 decreases to
approximately 0.4" w.c. The clogged filter output is energized when the supply fan is operating and
the clogged filter switch has been closed for at least 2 minutes. The system will continue to operate
regardless of the status of the filter switch.
Please note that on units equiped with factory installed MERV 13 filters, a clogged filter switch with
different pressure settings will be installed. This switch will close when the differential pressure
is approximately 0.8' w.c. and open when the differential falls to 0.7" w.c.
Compressor Disable (CPR1/2)
This input incorporates the low pressure control (LPC) of each refrigeration circuit and can be
activated by opening a field supplied contact installed on the LTB.
8 RT-SVX25C-EN