Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual page 27

General Information
terminate setpoint, the heat will turn off when the occ zone heat setpoint is reached, but it will stay
in DWU mode and cycle the heat to maintain setpoint.
Unoccupied Heating - Zone Temperature
When a Discharge Temperature Control unit is equipped with gas, electric, or hydronic heat and is
in the unoccupied mode, the zone temperature will be controlled to within the customers specified
setpoint deadband. During an unoccupied mode for a VAV unit, the VAV box/unocc relay will be in
the unoccupied position and the VFD/IGV output will be at 100%. This means that if there is a call
for heat (or cool) and the supply fan comes on, it will be at full airflow and the VAV boxes in the
space will need to be 100% open as signaled by the VAV box/unocc relay.
Supply Air Tempering
On Discharge Temperature Control units equipped with "Modulating Heat" , if the supply air
temperature falls 10°F below the supply air temperature setpoint, the hydronic heat valve will
modulate to maintain the supply air temperature to within the low end of the setpoint deadband.
Supply Duct Static Pressure Control (Occupied)
The RTM relies on input from the duct pressure transducer when a unit is equipped with Inlet Guide
Vanes or a Variable Frequency Drive to position the Inlet Guide Vanes or set the supply fan speed
to maintain the supply duct static pressure to within the static pressure setpoint deadband. See
Figure 3, p. 26.
RT-SVX36G-EN 27