General Information
18 RT-SVX24J-EN
Unit Control Modules
Unit control modules are microelectronic circuit boards
designed to perform specific unit functions.The control
modules, through proportional/integral control
algorithms, provide the best possible comfort level for the
customer.They are mounted in the control panel and are
factory wired to their respective internal components.
The control modules receive and interpret information
from other unit modules, sensors, remote panels, and
customer binary contacts to satisfy the applicable request
for economizing, mechanical cooling, heating, and
ventilation. Figure 9 illustrates the typical location of each
designated module.
Figure 7. Unit component layout and “ship with” locations
Return/
Exhaust
Fan
Outside Air
Dampers
Supply Fan
Condenser
Fans
Compressor
Section
Heating
Section
Exhaust Damper
Hood
Evap Coil
Evap Coil
Controls
Variable
Frquency
Drive (VFD)
Filter Section
Reheat Coil Option
Outside Air
Dampers
Return Air Dampers
Flue Vent
Access
Variable
Frquency
Drive (VFD)
Hot Water/Steam
Hydronic Connection
Outside Air
Static Kit and
sensors
Figure 8. Space temperature averaging with multiple
sensors
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