Duct Connections; Final Installation; Electrical Installation - Trane SCWM Series Installation, Operation And Maintenance Manual

Duct Connections

Return air enters the rear of the unit and conditioned supply
air discharges through the top. Attach supply air ductwork
directly to the unit's top panel, around the fan discharge
opening. A duct collar is not provided.
Install all air ducts according to the National Fire Protection
Association standards for the Installation of Air
Conditioning and Ventilation Systems other than
Residence Type (NFPA 90A) and Residence Type Warm
Air Heating and Air Conditioning Systems (NFPA 90B).
Make duct connections to the unit with a flexible material
such as heavy canvas. If a fire hazard exists, Trane
recommends using Flexweave 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. 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.
Figure 33. 3D-Intelliclamp™
2. Connect static pressure tubing located to the right of
PKG-SVX027D-EN
the control panel:
a. Discharge static
b. Filter inlet
c. Filter outlet
Figure 34. Static pressure tube
3. Complete field wiring connections on field terminal
strip:
a. E-Stop
b. Occupied
c. External auto/stop
d. Entering air temperature
e. Discharge air temperature

Electrical Installation

WARNING
Live Electrical Components!
Failure to follow all electrical safety precautions when
exposed to live electrical components could result in
death or serious injury.
When it is necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been properly trained in
handling live electrical components perform these
tasks.
1. With main power still dis-connected.
a. Circuit breakers on.
b. Place fuses in fan fuse holder.
c. One fuse pulled on control power transformer
primary.
d. Fan fuse holders connected, ie, closed.
e. Variable speed compressor fuses installed.
2. At the terminal block or disconnect switch.
Installation - Mechanical
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