Trane UniTrane Installation, Operation And Maintenance Manual page 128

Routine Maintenance
Replacing Motors
NOTICE:
Heavy Object!
Support the fan board when removing it from the unit.
Failure to properly support fan board may result in
minor to moderate personal injury.
Removing Fan Board
Motors are attached to the fan boards with screws at the
rear of the motors. Fan wheels are attached with Allen
screws on the fan hubs. In most applications, it is
necessary to remove the fan board to change out the
motor. The fan board is easily removable, with screws on
the front left and right edges of fan boards (vertical units
- see the figure below) or on the front left underside and
front right underside of the fan board (horizontal units -
see Figure 106).
Vertical Units
Figure 104. Routing motor and crossover harnesses for
vertical units
Grommet
Crossover harness wiring
Motor harness wiring
• In vertical units, wiring to the motor transitions from
the control panel onto a trough onto the fan board.
• The motor harnesses are routed through holes at the
motor location below the fan board and into the
motors with a latching multi-plug.
• The crossover harnesses, which are used to make
connections to the piping side of the unit, are routed in
the same manner but continue to the piping side
entirely through the trough on the fan board.
• On vertical fan-coil units with drain pans, a drain pan
support covers most of the wiring. Please be sure to
128
TQC verify that
wire protection covers
sharp edges
remove or secure the wiring before removing fan
board.
• Fan board attachment screws are located on the front
left and right edges of fan boards, and may be
concealed by gasketing.
Figure 105. Fan board attachment screw
Horizontal Units
Figure 106. Routing motor and crossover harnesses for
horizontal units
Grommet
Crossover harness wiring
Motor harness wiring
• In horizontal units, wiring to the motor is routed below
the fan board but is wire-tied to the fan board for
harness management and to avoid sharp edges.
• The motor harnesses terminate at the motor location
with a latching multi-plug.
TQC verify that
wire protection covers
sharp edges
UNT-SVX07J-EN