Installation - Mechanical
34
PKG-SVX027A-EN
Make duct connections to the unit with a flexible material
such as heavy canvas. If a fire hazard exists, Trane
recommends using Flex weave 1000, type FW30 or
equivalent canvas. Use three inches for return duct and
three inches for discharge duct. Keep material loose to
absorb fan vibration.
•
If using return ductwork to the unit, secure it with three
inches of flexible duct connector.
•
Extend discharge duct upward without change in size
or direction for at least three fan diameters.
•
Use 3" flexible duct connection on discharge ductwork.
Run the ductwork straight from the opening for a
minimum of three fan diameters. See
Figure 28, p. 34
.
Extend remaining ductwork as far as possible without
changing size or direction. Do not make abrupt turns or
transitions near the unit due to increased noise and
excessive static losses. Use elbows with splitters or
turning vanes to minimize static losses.
Poorly constructed turning vanes may cause airflow
generated noise. Align the fan outlet properly with the
ductwork to decrease noise levels in the duct and to
increase fan performance. To complete trunk ductwork to
the VAV terminal units, refer to the VAV box manuals for
specific requirements. Check total external static
pressures against fan characteristics to be sure the
required airflow is available throughout the ductwork.
To achieve maximum acoustical performance, minimize
the duct static pressure setpoint.
Final Installation
1. Ensure all 3D-Intelliclamp™ have been installed.
2. Connect static pressure tubing located to the right of
the control panel:
a. Discharge static
b. Filter inlet
c. Filter outlet
3. Complete field wiring connections on field terminal
strip:
a. E-Stop
b. Occupied
c. External auto/stop
d. Entering air temperature
Figure 28.
Duct connection recommendations
3 Fan
Diameters
Duct
Discharge
3-inch
Duct
Flexible
Air
Return
Figure 29.
3D-Intelliclamp™
Figure 30.
Static pressure tube
