RT-SVX36G-EN
15
General Information
Modulating Dehumidification Module MDM
(Optional 1U107 - used with Dehumidification Control)
The MDM supports specific control inputs and outputs for Modulating Dehumidification control
including Modulating Reheat and Cooling valve control as well as the Reheat Pumpout Relay
output.The Modulating Dehumidification control Algorithm provides control requests to the MDM
to accomplish proper Dehumidification control.
Ventilation Override Module
(VOM - Optional 1U51)
Important:
The ventilation override system should not be used to signal the presence of smoke
caused by a fire as it is not intended nor designed to do so.
The Ventilation Override module initiates specified functions such as; space pressurization,
exhaust, purge, purge with duct pressure control, and unit off when any one of the five (5) binary
inputs to the module are activated. The compressors and condenser fans are disabled during the
ventilation operation. If more than one ventilation sequence is activated, the one with the highest
priority is initiated.
Interprocessor Communications Board
(IPCB - Optional 1U55 used with the Optional Remote Human Interface)
The Interprocessor Communication Board expands communications from the rooftop unit UCM
network to a Remote Human Interface Panel. DIP switch settings on the IPCB module for this
application should be; Switches 1 and 2 “Off”, Switch 3 “On”.
LonTalk/BACnet Communication Interface Module
(LCI/BCI - Optional 1U54/1U104 - used on units with Trane ICSTM or 3rd party
Building Automation Systems)
The LonTalk or BACnet Communication Interface modules expand communications from the unit
UCM network to a Trane Tracer Summit or a 3rd party building automation system and allow
external setpoint and configuration adjustment and monitoring of status and diagnostics.
Exhaust/Comparative Enthalpy Module
(ECEM - Optional 1U52 used on units with Statitrac and/or comparative
enthalpy options)
The Exhaust/Comparative Enthalpy module receives information from the return air humidity
sensor, the outside air humidity sensor, and the return air temperature sensor to utilize the lowest
possible humidity level when considering economizer operation. In addition, it receives space
pressure information which is used to maintain the space pressure to within the setpoint control
band. Refer to
