Trane SFHJ090-162 - If All of the Fans Are Rotating Backwards

Unit Startup
114 RT-SVX24J-EN
If all of the fans are rotating backwards;
a. Press the STOP key at the Human Interface Module
in the unit control panel to stop the fan operation.
b. Open the field supplied disconnect switch upstream
of the rooftop unit. Lock the disconnect switch in the
open position while working at the unit.
c. Interchange any two of the field connected main
power wires at the unit terminal block or the factory
mounted disconnect switch.
Note: Interchanging “Load” side power wires at the fan
contactors will only affect the individual fan
rotation. Ensure that the voltage phase sequence at
the main terminal block or the factory mounted
disconnect switch is ABC as outlined in the
“Electrical Phasing” section.
If some of the fans are rotating backwards;
a. Press the STOP key at the Human Interface Module
in the unit control panel to stop the fan operation.
b. Open the field supplied disconnect switch upstream
of the rooftop unit. Lock the disconnect switch in the
open position while working at the unit.
c. Interchange any two of the fan motor leads at the
contactor for each fan that is rotating backwards.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
Figure 69. Air-cooled (90-150 tons)/evaporative (100-162 tons) condenser fan locations with human interface
designator
2B9
2B11
2B10
2B12
2B14
2B15
2B13
2B16
2B9 1K9
01K101B2
2B11 1K10
4K121B2
11K131B2
21K141B2
2B15 1K12
2B16 1K1
Condenser Fan Motor Designator
Condenser Fan contactor
Designator
120 TON
130 TON
150 TON
2B5
2B6
2B5 1K4*
*1K16B2
Condenser Fan Motor Designator
Condenser Fan contactor
Designator
100 TON
118 TON
128 TON
140 TON
162 TON
*Note: 2B5 and 2B6 are initiated with operation of
1K4 and 1K1 compressor contactors.