Setpoint Potentiometers - Trane ReliaTel Diagnostic Manual

ReliaTel Option Module (RTOM)
Smoke detector contacts are open during normal operation. When closed, the unit shuts down
immediately. When the contacts are re-opened, the unit will automatically restart.
Note: Ventilation override option will override smoke detector input through the RTOM.
J8 Input:
Relative Humidity Sensor provides input to reheat for dehumidification.
J9 Input:
Reheat Enable Input provides a binary input to configure the unit for Reheat.
J10 Input:
Humidistat provides binary input to energize the reheat valve for dehumidification. When the
humidistat is satisfied, the reheat valve is de-energized (3 - 25 ton units only).
J12 Input:
Heat Pump Low Ambient Limit Config provides a configuration input to disable compressor
heating on heat pumps when the Outdoor Temperature falls below 1.4F . Compressor Heating is re-
enabled when the Outdoor Temperature rises to 3.5F .
Alarm Indication Config provides a configuration input to determine which diagnostics will
energize the Alarm Indication output. If Open, the Alarm Indication output will energize whenever
the RTRM System LED is blinking a 2-blink error code. If Closed to common, the Alarm Indication
output will energize whenever any key system component is locked out (Cooling, Heating, etc.)
Alarm Indication Output provides a 24vac output when the system is in an alarm condition as
determined by the Alarm Indication config.

Setpoint Potentiometers

Exhaust setpoint potentiometer sets the point to which the exhaust fan will come on. It can be
set from 0% (exhaust is always on unless overridden off) to 100% (exhaust fan comes on when
economizer is 100% outside air). Turn clockwise to increase setpoint.
Discharge Air Heat Setpoint Potentiometer sets the Discharge Air Heat Setpoint on units
configured with Modulating Gas Heat under thermostat control.
SA Reheat Setpoint Potentiometer - For 27.5-50T V3 units, used to set the Supply Air Reheat
setpoint for units with Modulating Dehumidification.
Dehumid. Setpoint - For units with reheat (On/Off and Modulating) installed, used to set the
space humidity setpoint used for dehumidification control.
Note: For RTOM v3.0 and later, test point "hooks" are included on the module next to each setpoint
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potentiometer to allow a more accurate setup. Connect a DC volt meter to the test point and
ground to verify the setpoint desired according to the tables below:
RT-SVD03G-EN